MagickCore 6.9.13-53
Convert, Edit, Or Compose Bitmap Images
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draw.c
1/*
2%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3% %
4% %
5% %
6% DDDD RRRR AAA W W %
7% D D R R A A W W %
8% D D RRRR AAAAA W W W %
9% D D R RN A A WW WW %
10% DDDD R R A A W W %
11% %
12% %
13% MagickCore Image Drawing Methods %
14% %
15% %
16% Software Design %
17% Cristy %
18% July 1998 %
19% %
20% %
21% Copyright 1999 ImageMagick Studio LLC, a non-profit organization %
22% dedicated to making software imaging solutions freely available. %
23% %
24% You may not use this file except in compliance with the License. You may %
25% obtain a copy of the License at %
26% %
27% https://imagemagick.org/license/ %
28% %
29% Unless required by applicable law or agreed to in writing, software %
30% distributed under the License is distributed on an "AS IS" BASIS, %
31% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
32% See the License for the specific language governing permissions and %
33% limitations under the License. %
34% %
35%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
36%
37% Bill Radcliffe of Corbis (www.corbis.com) contributed the polygon
38% rendering code based on Paul Heckbert's "Concave Polygon Scan Conversion",
39% Graphics Gems, 1990. Leonard Rosenthal and David Harr of Appligent
40% (www.appligent.com) contributed the dash pattern, linecap stroking
41% algorithm, and minor rendering improvements.
42%
43*/
44␌
45/*
46 Include declarations.
47*/
48#include "magick/studio.h"
49#include "magick/annotate.h"
50#include "magick/artifact.h"
51#include "magick/blob.h"
52#include "magick/cache.h"
53#include "magick/cache-private.h"
54#include "magick/cache-view.h"
55#include "magick/channel.h"
56#include "magick/color.h"
57#include "magick/color-private.h"
58#include "magick/colorspace.h"
59#include "magick/colorspace-private.h"
60#include "magick/composite.h"
61#include "magick/composite-private.h"
62#include "magick/constitute.h"
63#include "magick/constitute-private.h"
64#include "magick/draw.h"
65#include "magick/draw-private.h"
66#include "magick/enhance.h"
67#include "magick/exception.h"
68#include "magick/exception-private.h"
69#include "magick/gem.h"
70#include "magick/geometry.h"
71#include "magick/image-private.h"
72#include "magick/list.h"
73#include "magick/log.h"
74#include "magick/magick.h"
75#include "magick/memory-private.h"
76#include "magick/monitor.h"
77#include "magick/monitor-private.h"
78#include "magick/option.h"
79#include "magick/paint.h"
80#include "magick/pixel-accessor.h"
81#include "magick/pixel-private.h"
82#include "magick/property.h"
83#include "magick/resample.h"
84#include "magick/resample-private.h"
85#include "magick/resource_.h"
86#include "magick/splay-tree.h"
87#include "magick/string_.h"
88#include "magick/string-private.h"
89#include "magick/thread-private.h"
90#include "magick/token.h"
91#include "magick/transform.h"
92#include "magick/utility.h"
93␌
94/*
95 Define declarations.
96*/
97#define AntialiasThreshold (1.0/3.0)
98#define BezierQuantum 200
99#define PrimitiveExtentPad 4296.0
100#define MaxBezierCoordinates 67108864
101#define ThrowPointExpectedException(image,token) \
102{ \
103 (void) ThrowMagickException(&(image)->exception,GetMagickModule(),DrawError, \
104 "NonconformingDrawingPrimitiveDefinition","`%s'",token); \
105 status=MagickFalse; \
106 break; \
107}
108␌
109/*
110 Typedef declarations.
111*/
112typedef struct _EdgeInfo
113{
114 SegmentInfo
115 bounds;
116
117 double
118 scanline;
119
120 PointInfo
121 *points;
122
123 size_t
124 number_points;
125
126 ssize_t
127 direction;
128
129 MagickBooleanType
130 ghostline;
131
132 size_t
133 highwater;
134} EdgeInfo;
135
136typedef struct _ElementInfo
137{
138 double
139 cx,
140 cy,
141 major,
142 minor,
143 angle;
144} ElementInfo;
145
146typedef struct _MVGInfo
147{
148 PrimitiveInfo
149 **primitive_info;
150
151 size_t
152 *extent;
153
154 ssize_t
155 offset;
156
157 PointInfo
158 point;
159
160 ExceptionInfo
161 *exception;
162} MVGInfo;
163
164typedef struct _PolygonInfo
165{
166 EdgeInfo
167 *edges;
168
169 size_t
170 number_edges;
171} PolygonInfo;
172
173typedef enum
174{
175 MoveToCode,
176 OpenCode,
177 GhostlineCode,
178 LineToCode,
179 EndCode
180} PathInfoCode;
181
182typedef struct _PathInfo
183{
184 PointInfo
185 point;
186
187 PathInfoCode
188 code;
189} PathInfo;
190␌
191/*
192 Forward declarations.
193*/
194static Image
195 *DrawClippingMask(Image *,const DrawInfo *,const char *,const char *,
196 ExceptionInfo *);
197
198static MagickBooleanType
199 DrawStrokePolygon(Image *,const DrawInfo *,const PrimitiveInfo *),
200 RenderMVGContent(Image *,const DrawInfo *,const size_t),
201 TraceArc(MVGInfo *,const PointInfo,const PointInfo,const PointInfo),
202 TraceArcPath(MVGInfo *,const PointInfo,const PointInfo,const PointInfo,
203 const double,const MagickBooleanType,const MagickBooleanType),
204 TraceBezier(MVGInfo *,const size_t),
205 TraceCircle(MVGInfo *,const PointInfo,const PointInfo),
206 TraceEllipse(MVGInfo *,const PointInfo,const PointInfo,const PointInfo),
207 TraceLine(PrimitiveInfo *,const PointInfo,const PointInfo),
208 TraceRectangle(PrimitiveInfo *,const PointInfo,const PointInfo),
209 TraceRoundRectangle(MVGInfo *,const PointInfo,const PointInfo,PointInfo),
210 TraceSquareLinecap(PrimitiveInfo *,const size_t,const double);
211
212static PrimitiveInfo
213 *TraceStrokePolygon(const DrawInfo *,const PrimitiveInfo *,ExceptionInfo *);
214
215static ssize_t
216 TracePath(Image *,MVGInfo *,const char *);
217␌
218/*
219%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
220% %
221% %
222% %
223% A c q u i r e D r a w I n f o %
224% %
225% %
226% %
227%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
228%
229% AcquireDrawInfo() returns a DrawInfo structure properly initialized.
230%
231% The format of the AcquireDrawInfo method is:
232%
233% DrawInfo *AcquireDrawInfo(void)
234%
235*/
236MagickExport DrawInfo *AcquireDrawInfo(void)
237{
238 DrawInfo
239 *draw_info;
240
241 draw_info=(DrawInfo *) AcquireCriticalMemory(sizeof(*draw_info));
242 GetDrawInfo((ImageInfo *) NULL,draw_info);
243 return(draw_info);
244}
245␌
246/*
247%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
248% %
249% %
250% %
251% C l o n e D r a w I n f o %
252% %
253% %
254% %
255%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
256%
257% CloneDrawInfo() makes a copy of the given draw_info structure. If NULL
258% is specified, a new DrawInfo structure is created initialized to default
259% values.
260%
261% The format of the CloneDrawInfo method is:
262%
263% DrawInfo *CloneDrawInfo(const ImageInfo *image_info,
264% const DrawInfo *draw_info)
265%
266% A description of each parameter follows:
267%
268% o image_info: the image info.
269%
270% o draw_info: the draw info.
271%
272*/
273MagickExport DrawInfo *CloneDrawInfo(const ImageInfo *image_info,
274 const DrawInfo *draw_info)
275{
276 DrawInfo
277 *clone_info;
278
279 clone_info=(DrawInfo *) AcquireCriticalMemory(sizeof(*clone_info));
280 GetDrawInfo(image_info,clone_info);
281 if (draw_info == (DrawInfo *) NULL)
282 return(clone_info);
283 if (draw_info->id != (char *) NULL)
284 (void) CloneString(&clone_info->id,draw_info->id);
285 if (draw_info->primitive != (char *) NULL)
286 (void) CloneString(&clone_info->primitive,draw_info->primitive);
287 if (draw_info->geometry != (char *) NULL)
288 (void) CloneString(&clone_info->geometry,draw_info->geometry);
289 clone_info->compliance=draw_info->compliance;
290 clone_info->viewbox=draw_info->viewbox;
291 clone_info->affine=draw_info->affine;
292 clone_info->gravity=draw_info->gravity;
293 clone_info->fill=draw_info->fill;
294 clone_info->stroke=draw_info->stroke;
295 clone_info->stroke_width=draw_info->stroke_width;
296 if (draw_info->fill_pattern != (Image *) NULL)
297 clone_info->fill_pattern=CloneImage(draw_info->fill_pattern,0,0,MagickTrue,
298 &draw_info->fill_pattern->exception);
299 else
300 if (draw_info->tile != (Image *) NULL)
301 clone_info->fill_pattern=CloneImage(draw_info->tile,0,0,MagickTrue,
302 &draw_info->tile->exception);
303 clone_info->tile=NewImageList(); /* tile is deprecated */
304 if (draw_info->stroke_pattern != (Image *) NULL)
305 clone_info->stroke_pattern=CloneImage(draw_info->stroke_pattern,0,0,
306 MagickTrue,&draw_info->stroke_pattern->exception);
307 clone_info->stroke_antialias=draw_info->stroke_antialias;
308 clone_info->text_antialias=draw_info->text_antialias;
309 clone_info->fill_rule=draw_info->fill_rule;
310 clone_info->linecap=draw_info->linecap;
311 clone_info->linejoin=draw_info->linejoin;
312 clone_info->miterlimit=draw_info->miterlimit;
313 clone_info->dash_offset=draw_info->dash_offset;
314 clone_info->decorate=draw_info->decorate;
315 clone_info->compose=draw_info->compose;
316 if (draw_info->text != (char *) NULL)
317 (void) CloneString(&clone_info->text,draw_info->text);
318 if (draw_info->font != (char *) NULL)
319 (void) CloneString(&clone_info->font,draw_info->font);
320 if (draw_info->metrics != (char *) NULL)
321 (void) CloneString(&clone_info->metrics,draw_info->metrics);
322 if (draw_info->family != (char *) NULL)
323 (void) CloneString(&clone_info->family,draw_info->family);
324 clone_info->style=draw_info->style;
325 clone_info->stretch=draw_info->stretch;
326 clone_info->weight=draw_info->weight;
327 if (draw_info->encoding != (char *) NULL)
328 (void) CloneString(&clone_info->encoding,draw_info->encoding);
329 clone_info->pointsize=draw_info->pointsize;
330 clone_info->kerning=draw_info->kerning;
331 clone_info->interline_spacing=draw_info->interline_spacing;
332 clone_info->interword_spacing=draw_info->interword_spacing;
333 clone_info->direction=draw_info->direction;
334 if (draw_info->density != (char *) NULL)
335 (void) CloneString(&clone_info->density,draw_info->density);
336 clone_info->align=draw_info->align;
337 clone_info->undercolor=draw_info->undercolor;
338 clone_info->border_color=draw_info->border_color;
339 if (draw_info->server_name != (char *) NULL)
340 (void) CloneString(&clone_info->server_name,draw_info->server_name);
341 if (draw_info->dash_pattern != (double *) NULL)
342 {
343 ssize_t
344 x;
345
346 for (x=0; fabs(draw_info->dash_pattern[x]) >= MagickEpsilon; x++) ;
347 clone_info->dash_pattern=(double *) AcquireQuantumMemory((size_t) (2*x+2),
348 sizeof(*clone_info->dash_pattern));
349 if (clone_info->dash_pattern == (double *) NULL)
350 ThrowFatalException(ResourceLimitFatalError,
351 "UnableToAllocateDashPattern");
352 (void) memset(clone_info->dash_pattern,0,(size_t) (2*x+2)*
353 sizeof(*clone_info->dash_pattern));
354 (void) memcpy(clone_info->dash_pattern,draw_info->dash_pattern,(size_t)
355 (x+1)*sizeof(*clone_info->dash_pattern));
356 }
357 clone_info->gradient=draw_info->gradient;
358 if (draw_info->gradient.stops != (StopInfo *) NULL)
359 {
360 size_t
361 number_stops;
362
363 number_stops=clone_info->gradient.number_stops;
364 clone_info->gradient.stops=(StopInfo *) AcquireQuantumMemory((size_t)
365 number_stops,sizeof(*clone_info->gradient.stops));
366 if (clone_info->gradient.stops == (StopInfo *) NULL)
367 ThrowFatalException(ResourceLimitFatalError,
368 "UnableToAllocateDashPattern");
369 (void) memcpy(clone_info->gradient.stops,draw_info->gradient.stops,
370 (size_t) number_stops*sizeof(*clone_info->gradient.stops));
371 }
372 clone_info->bounds=draw_info->bounds;
373 clone_info->fill_opacity=draw_info->fill_opacity;
374 clone_info->stroke_opacity=draw_info->stroke_opacity;
375 clone_info->element_reference=draw_info->element_reference;
376 clone_info->clip_path=draw_info->clip_path;
377 clone_info->clip_units=draw_info->clip_units;
378 if (draw_info->clip_mask != (char *) NULL)
379 (void) CloneString(&clone_info->clip_mask,draw_info->clip_mask);
380 if (draw_info->clipping_mask != (Image *) NULL)
381 clone_info->clipping_mask=CloneImage(draw_info->clipping_mask,0,0,
382 MagickTrue,&draw_info->clipping_mask->exception);
383 if (draw_info->composite_mask != (Image *) NULL)
384 clone_info->composite_mask=CloneImage(draw_info->composite_mask,0,0,
385 MagickTrue,&draw_info->composite_mask->exception);
386 clone_info->render=draw_info->render;
387 clone_info->debug=draw_info->debug;
388 return(clone_info);
389}
390␌
391/*
392%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
393% %
394% %
395% %
396+ C o n v e r t P a t h T o P o l y g o n %
397% %
398% %
399% %
400%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
401%
402% ConvertPathToPolygon() converts a path to the more efficient sorted
403% rendering form.
404%
405% The format of the ConvertPathToPolygon method is:
406%
407% PolygonInfo *ConvertPathToPolygon(const PathInfo *path_info,
408% ExceptionInfo *exception)
409%
410% A description of each parameter follows:
411%
412% o ConvertPathToPolygon() returns the path in a more efficient sorted
413% rendering form of type PolygonInfo.
414%
415% o draw_info: Specifies a pointer to an DrawInfo structure.
416%
417% o path_info: Specifies a pointer to an PathInfo structure.
418%
419% o exception: return any errors or warnings in this structure.
420%
421*/
422
423static PolygonInfo *DestroyPolygonInfo(PolygonInfo *polygon_info)
424{
425 ssize_t
426 i;
427
428 if (polygon_info->edges != (EdgeInfo *) NULL)
429 {
430 for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
431 if (polygon_info->edges[i].points != (PointInfo *) NULL)
432 polygon_info->edges[i].points=(PointInfo *)
433 RelinquishMagickMemory(polygon_info->edges[i].points);
434 polygon_info->edges=(EdgeInfo *) RelinquishMagickMemory(
435 polygon_info->edges);
436 }
437 return((PolygonInfo *) RelinquishMagickMemory(polygon_info));
438}
439
440#if defined(__cplusplus) || defined(c_plusplus)
441extern "C" {
442#endif
443
444static int DrawCompareEdges(const void *p_edge,const void *q_edge)
445{
446#define DrawCompareEdge(p,q) \
447{ \
448 if (((p)-(q)) < 0.0) \
449 return(-1); \
450 if (((p)-(q)) > 0.0) \
451 return(1); \
452}
453
454 const PointInfo
455 *p,
456 *q;
457
458 /*
459 Edge sorting for right-handed coordinate system.
460 */
461 p=((const EdgeInfo *) p_edge)->points;
462 q=((const EdgeInfo *) q_edge)->points;
463 DrawCompareEdge(p[0].y,q[0].y);
464 DrawCompareEdge(p[0].x,q[0].x);
465 DrawCompareEdge((p[1].x-p[0].x)*(q[1].y-q[0].y),(p[1].y-p[0].y)*
466 (q[1].x-q[0].x));
467 DrawCompareEdge(p[1].y,q[1].y);
468 DrawCompareEdge(p[1].x,q[1].x);
469 return(0);
470}
471
472#if defined(__cplusplus) || defined(c_plusplus)
473}
474#endif
475
476static void LogPolygonInfo(const PolygonInfo *polygon_info)
477{
478 EdgeInfo
479 *p;
480
481 ssize_t
482 i,
483 j;
484
485 (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin active-edge");
486 p=polygon_info->edges;
487 for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
488 {
489 (void) LogMagickEvent(DrawEvent,GetMagickModule()," edge %.20g:",
490 (double) i);
491 (void) LogMagickEvent(DrawEvent,GetMagickModule()," direction: %s",
492 p->direction != MagickFalse ? "down" : "up");
493 (void) LogMagickEvent(DrawEvent,GetMagickModule()," ghostline: %s",
494 p->ghostline != MagickFalse ? "transparent" : "opaque");
495 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
496 " bounds: %g,%g - %g,%g",p->bounds.x1,p->bounds.y1,
497 p->bounds.x2,p->bounds.y2);
498 for (j=0; j < (ssize_t) p->number_points; j++)
499 (void) LogMagickEvent(DrawEvent,GetMagickModule()," %g,%g",
500 p->points[j].x,p->points[j].y);
501 p++;
502 }
503 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end active-edge");
504}
505
506static void ReversePoints(PointInfo *points,const size_t number_points)
507{
508 PointInfo
509 point;
510
511 ssize_t
512 i;
513
514 for (i=0; i < (ssize_t) (number_points >> 1); i++)
515 {
516 point=points[i];
517 points[i]=points[number_points-(i+1)];
518 points[number_points-(i+1)]=point;
519 }
520}
521
522static PolygonInfo *ConvertPathToPolygon(const PathInfo *path_info,
523 ExceptionInfo *exception)
524{
525 long
526 direction,
527 next_direction;
528
529 PointInfo
530 point,
531 *points;
532
533 PolygonInfo
534 *polygon_info;
535
536 SegmentInfo
537 bounds;
538
539 ssize_t
540 i,
541 n;
542
543 MagickBooleanType
544 ghostline;
545
546 size_t
547 edge,
548 number_edges,
549 number_points;
550
551 /*
552 Convert a path to the more efficient sorted rendering form.
553 */
554 polygon_info=(PolygonInfo *) AcquireMagickMemory(sizeof(*polygon_info));
555 if (polygon_info == (PolygonInfo *) NULL)
556 {
557 (void) ThrowMagickException(exception,GetMagickModule(),
558 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
559 return((PolygonInfo *) NULL);
560 }
561 number_edges=16;
562 polygon_info->edges=(EdgeInfo *) AcquireQuantumMemory(number_edges,
563 sizeof(*polygon_info->edges));
564 if (polygon_info->edges == (EdgeInfo *) NULL)
565 {
566 (void) ThrowMagickException(exception,GetMagickModule(),
567 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
568 return(DestroyPolygonInfo(polygon_info));
569 }
570 (void) memset(polygon_info->edges,0,number_edges*
571 sizeof(*polygon_info->edges));
572 direction=0;
573 edge=0;
574 ghostline=MagickFalse;
575 n=0;
576 number_points=0;
577 points=(PointInfo *) NULL;
578 (void) memset(&point,0,sizeof(point));
579 (void) memset(&bounds,0,sizeof(bounds));
580 polygon_info->edges[edge].number_points=(size_t) n;
581 polygon_info->edges[edge].scanline=0.0;
582 polygon_info->edges[edge].highwater=0;
583 polygon_info->edges[edge].ghostline=ghostline;
584 polygon_info->edges[edge].direction=(ssize_t) direction;
585 polygon_info->edges[edge].points=points;
586 polygon_info->edges[edge].bounds=bounds;
587 polygon_info->number_edges=0;
588 for (i=0; path_info[i].code != EndCode; i++)
589 {
590 if ((path_info[i].code == MoveToCode) || (path_info[i].code == OpenCode) ||
591 (path_info[i].code == GhostlineCode))
592 {
593 /*
594 Move to.
595 */
596 if ((points != (PointInfo *) NULL) && (n >= 2))
597 {
598 if (edge == number_edges)
599 {
600 number_edges<<=1;
601 polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
602 polygon_info->edges,(size_t) number_edges,
603 sizeof(*polygon_info->edges));
604 if (polygon_info->edges == (EdgeInfo *) NULL)
605 {
606 (void) ThrowMagickException(exception,GetMagickModule(),
607 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
608 points=(PointInfo *) RelinquishMagickMemory(points);
609 return(DestroyPolygonInfo(polygon_info));
610 }
611 }
612 polygon_info->edges[edge].number_points=(size_t) n;
613 polygon_info->edges[edge].scanline=(-1.0);
614 polygon_info->edges[edge].highwater=0;
615 polygon_info->edges[edge].ghostline=ghostline;
616 polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
617 if (direction < 0)
618 ReversePoints(points,(size_t) n);
619 polygon_info->edges[edge].points=points;
620 polygon_info->edges[edge].bounds=bounds;
621 polygon_info->edges[edge].bounds.y1=points[0].y;
622 polygon_info->edges[edge].bounds.y2=points[n-1].y;
623 points=(PointInfo *) NULL;
624 ghostline=MagickFalse;
625 edge++;
626 polygon_info->number_edges=edge;
627 }
628 if (points == (PointInfo *) NULL)
629 {
630 number_points=16;
631 points=(PointInfo *) AcquireQuantumMemory((size_t) number_points,
632 sizeof(*points));
633 if (points == (PointInfo *) NULL)
634 {
635 (void) ThrowMagickException(exception,GetMagickModule(),
636 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
637 return(DestroyPolygonInfo(polygon_info));
638 }
639 }
640 ghostline=path_info[i].code == GhostlineCode ? MagickTrue : MagickFalse;
641 point=path_info[i].point;
642 points[0]=point;
643 bounds.x1=point.x;
644 bounds.x2=point.x;
645 direction=0;
646 n=1;
647 continue;
648 }
649 /*
650 Line to.
651 */
652 next_direction=((path_info[i].point.y > point.y) ||
653 ((fabs(path_info[i].point.y-point.y) < MagickEpsilon) &&
654 (path_info[i].point.x > point.x))) ? 1 : -1;
655 if ((points != (PointInfo *) NULL) && (direction != 0) &&
656 (direction != next_direction))
657 {
658 /*
659 New edge.
660 */
661 point=points[n-1];
662 if (edge == number_edges)
663 {
664 number_edges<<=1;
665 polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
666 polygon_info->edges,(size_t) number_edges,
667 sizeof(*polygon_info->edges));
668 if (polygon_info->edges == (EdgeInfo *) NULL)
669 {
670 (void) ThrowMagickException(exception,GetMagickModule(),
671 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
672 points=(PointInfo *) RelinquishMagickMemory(points);
673 return(DestroyPolygonInfo(polygon_info));
674 }
675 }
676 polygon_info->edges[edge].number_points=(size_t) n;
677 polygon_info->edges[edge].scanline=(-1.0);
678 polygon_info->edges[edge].highwater=0;
679 polygon_info->edges[edge].ghostline=ghostline;
680 polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
681 if (direction < 0)
682 ReversePoints(points,(size_t) n);
683 polygon_info->edges[edge].points=points;
684 polygon_info->edges[edge].bounds=bounds;
685 polygon_info->edges[edge].bounds.y1=points[0].y;
686 polygon_info->edges[edge].bounds.y2=points[n-1].y;
687 polygon_info->number_edges=edge+1;
688 points=(PointInfo *) NULL;
689 number_points=16;
690 points=(PointInfo *) AcquireQuantumMemory((size_t) number_points,
691 sizeof(*points));
692 if (points == (PointInfo *) NULL)
693 {
694 (void) ThrowMagickException(exception,GetMagickModule(),
695 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
696 return(DestroyPolygonInfo(polygon_info));
697 }
698 n=1;
699 ghostline=MagickFalse;
700 points[0]=point;
701 bounds.x1=point.x;
702 bounds.x2=point.x;
703 edge++;
704 }
705 direction=next_direction;
706 if (points == (PointInfo *) NULL)
707 continue;
708 if (n == (ssize_t) number_points)
709 {
710 number_points<<=1;
711 points=(PointInfo *) ResizeQuantumMemory(points,(size_t) number_points,
712 sizeof(*points));
713 if (points == (PointInfo *) NULL)
714 {
715 (void) ThrowMagickException(exception,GetMagickModule(),
716 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
717 return(DestroyPolygonInfo(polygon_info));
718 }
719 }
720 point=path_info[i].point;
721 points[n]=point;
722 if (point.x < bounds.x1)
723 bounds.x1=point.x;
724 if (point.x > bounds.x2)
725 bounds.x2=point.x;
726 n++;
727 }
728 if (points != (PointInfo *) NULL)
729 {
730 if (n < 2)
731 points=(PointInfo *) RelinquishMagickMemory(points);
732 else
733 {
734 if (edge == number_edges)
735 {
736 number_edges<<=1;
737 polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
738 polygon_info->edges,(size_t) number_edges,
739 sizeof(*polygon_info->edges));
740 if (polygon_info->edges == (EdgeInfo *) NULL)
741 {
742 (void) ThrowMagickException(exception,GetMagickModule(),
743 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
744 return(DestroyPolygonInfo(polygon_info));
745 }
746 }
747 polygon_info->edges[edge].number_points=(size_t) n;
748 polygon_info->edges[edge].scanline=(-1.0);
749 polygon_info->edges[edge].highwater=0;
750 polygon_info->edges[edge].ghostline=ghostline;
751 polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
752 if (direction < 0)
753 ReversePoints(points,(size_t) n);
754 polygon_info->edges[edge].points=points;
755 polygon_info->edges[edge].bounds=bounds;
756 polygon_info->edges[edge].bounds.y1=points[0].y;
757 polygon_info->edges[edge].bounds.y2=points[n-1].y;
758 points=(PointInfo *) NULL;
759 ghostline=MagickFalse;
760 edge++;
761 polygon_info->number_edges=edge;
762 }
763 }
764 polygon_info->number_edges=edge;
765 polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(polygon_info->edges,
766 polygon_info->number_edges,sizeof(*polygon_info->edges));
767 if (polygon_info->edges == (EdgeInfo *) NULL)
768 {
769 (void) ThrowMagickException(exception,GetMagickModule(),
770 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
771 return(DestroyPolygonInfo(polygon_info));
772 }
773 for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
774 {
775 EdgeInfo
776 *edge_info;
777
778 edge_info=polygon_info->edges+i;
779 edge_info->points=(PointInfo *) ResizeQuantumMemory(edge_info->points,
780 edge_info->number_points,sizeof(*edge_info->points));
781 if (edge_info->points == (PointInfo *) NULL)
782 {
783 (void) ThrowMagickException(exception,GetMagickModule(),
784 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
785 return(DestroyPolygonInfo(polygon_info));
786 }
787 }
788 qsort(polygon_info->edges,(size_t) polygon_info->number_edges,
789 sizeof(*polygon_info->edges),DrawCompareEdges);
790 if ((GetLogEventMask() & DrawEvent) != 0)
791 LogPolygonInfo(polygon_info);
792 return(polygon_info);
793}
794␌
795/*
796%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
797% %
798% %
799% %
800+ C o n v e r t P r i m i t i v e T o P a t h %
801% %
802% %
803% %
804%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
805%
806% ConvertPrimitiveToPath() converts a PrimitiveInfo structure into a vector
807% path structure.
808%
809% The format of the ConvertPrimitiveToPath method is:
810%
811% PathInfo *ConvertPrimitiveToPath(const DrawInfo *draw_info,
812% const PrimitiveInfo *primitive_info,ExceptionInfo *exception)
813%
814% A description of each parameter follows:
815%
816% o ConvertPrimitiveToPath() returns a vector path structure of type
817% PathInfo.
818%
819% o draw_info: a structure of type DrawInfo.
820%
821% o primitive_info: Specifies a pointer to an PrimitiveInfo structure.
822%
823%
824*/
825
826static void LogPathInfo(const PathInfo *path_info)
827{
828 const PathInfo
829 *p;
830
831 (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin vector-path");
832 for (p=path_info; p->code != EndCode; p++)
833 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
834 " %g,%g %s",p->point.x,p->point.y,p->code == GhostlineCode ?
835 "moveto ghostline" : p->code == OpenCode ? "moveto open" :
836 p->code == MoveToCode ? "moveto" : p->code == LineToCode ? "lineto" :
837 "?");
838 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end vector-path");
839}
840
841static PathInfo *ConvertPrimitiveToPath(
842 const DrawInfo *magick_unused(draw_info),const PrimitiveInfo *primitive_info,
843 ExceptionInfo *exception)
844{
845 MagickBooleanType
846 closed_subpath;
847
848 PathInfo
849 *path_info;
850
851 PathInfoCode
852 code;
853
854 PointInfo
855 p,
856 q;
857
858 ssize_t
859 i,
860 n;
861
862 ssize_t
863 coordinates,
864 start;
865
866 magick_unreferenced(draw_info);
867
868 /*
869 Converts a PrimitiveInfo structure into a vector path structure.
870 */
871 switch (primitive_info->primitive)
872 {
873 case PointPrimitive:
874 case ColorPrimitive:
875 case MattePrimitive:
876 case TextPrimitive:
877 case ImagePrimitive:
878 return((PathInfo *) NULL);
879 default:
880 break;
881 }
882 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
883 path_info=(PathInfo *) AcquireQuantumMemory((size_t) (3UL*i+1UL),
884 sizeof(*path_info));
885 if (path_info == (PathInfo *) NULL)
886 {
887 (void) ThrowMagickException(exception,GetMagickModule(),
888 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
889 return((PathInfo *) NULL);
890 }
891 coordinates=0;
892 closed_subpath=MagickFalse;
893 n=0;
894 p.x=(-1.0);
895 p.y=(-1.0);
896 q.x=(-1.0);
897 q.y=(-1.0);
898 start=0;
899 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
900 {
901 code=LineToCode;
902 if (coordinates <= 0)
903 {
904 /*
905 New subpath.
906 */
907 coordinates=(ssize_t) primitive_info[i].coordinates;
908 p=primitive_info[i].point;
909 start=n;
910 code=MoveToCode;
911 closed_subpath=primitive_info[i].closed_subpath;
912 }
913 coordinates--;
914 if ((code == MoveToCode) || (coordinates <= 0) ||
915 (fabs(q.x-primitive_info[i].point.x) >= MagickEpsilon) ||
916 (fabs(q.y-primitive_info[i].point.y) >= MagickEpsilon))
917 {
918 /*
919 Eliminate duplicate points.
920 */
921 path_info[n].code=code;
922 path_info[n].point=primitive_info[i].point;
923 q=primitive_info[i].point;
924 n++;
925 }
926 if (coordinates > 0)
927 continue; /* next point in current subpath */
928 if (closed_subpath != MagickFalse)
929 {
930 closed_subpath=MagickFalse;
931 continue;
932 }
933 /*
934 Mark the p point as open if the subpath is not closed.
935 */
936 path_info[start].code=OpenCode;
937 path_info[n].code=GhostlineCode;
938 path_info[n].point=primitive_info[i].point;
939 n++;
940 path_info[n].code=LineToCode;
941 path_info[n].point=p;
942 n++;
943 }
944 path_info[n].code=EndCode;
945 path_info[n].point.x=0.0;
946 path_info[n].point.y=0.0;
947 if (IsEventLogging() != MagickFalse)
948 LogPathInfo(path_info);
949 path_info=(PathInfo *) ResizeQuantumMemory(path_info,(size_t) (n+1),
950 sizeof(*path_info));
951 return(path_info);
952}
953␌
954/*
955%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
956% %
957% %
958% %
959% D e s t r o y D r a w I n f o %
960% %
961% %
962% %
963%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
964%
965% DestroyDrawInfo() deallocates memory associated with an DrawInfo structure.
966%
967% The format of the DestroyDrawInfo method is:
968%
969% DrawInfo *DestroyDrawInfo(DrawInfo *draw_info)
970%
971% A description of each parameter follows:
972%
973% o draw_info: the draw info.
974%
975*/
976MagickExport DrawInfo *DestroyDrawInfo(DrawInfo *draw_info)
977{
978 assert(draw_info != (DrawInfo *) NULL);
979 assert(draw_info->signature == MagickCoreSignature);
980 if (IsEventLogging() != MagickFalse)
981 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
982 if (draw_info->id != (char *) NULL)
983 draw_info->id=DestroyString(draw_info->id);
984 if (draw_info->primitive != (char *) NULL)
985 draw_info->primitive=DestroyString(draw_info->primitive);
986 if (draw_info->text != (char *) NULL)
987 draw_info->text=DestroyString(draw_info->text);
988 if (draw_info->geometry != (char *) NULL)
989 draw_info->geometry=DestroyString(draw_info->geometry);
990 if (draw_info->tile != (Image *) NULL)
991 draw_info->tile=DestroyImage(draw_info->tile);
992 if (draw_info->fill_pattern != (Image *) NULL)
993 draw_info->fill_pattern=DestroyImage(draw_info->fill_pattern);
994 if (draw_info->stroke_pattern != (Image *) NULL)
995 draw_info->stroke_pattern=DestroyImage(draw_info->stroke_pattern);
996 if (draw_info->font != (char *) NULL)
997 draw_info->font=DestroyString(draw_info->font);
998 if (draw_info->metrics != (char *) NULL)
999 draw_info->metrics=DestroyString(draw_info->metrics);
1000 if (draw_info->family != (char *) NULL)
1001 draw_info->family=DestroyString(draw_info->family);
1002 if (draw_info->encoding != (char *) NULL)
1003 draw_info->encoding=DestroyString(draw_info->encoding);
1004 if (draw_info->density != (char *) NULL)
1005 draw_info->density=DestroyString(draw_info->density);
1006 if (draw_info->server_name != (char *) NULL)
1007 draw_info->server_name=(char *)
1008 RelinquishMagickMemory(draw_info->server_name);
1009 if (draw_info->dash_pattern != (double *) NULL)
1010 draw_info->dash_pattern=(double *) RelinquishMagickMemory(
1011 draw_info->dash_pattern);
1012 if (draw_info->gradient.stops != (StopInfo *) NULL)
1013 draw_info->gradient.stops=(StopInfo *) RelinquishMagickMemory(
1014 draw_info->gradient.stops);
1015 if (draw_info->clip_mask != (char *) NULL)
1016 draw_info->clip_mask=DestroyString(draw_info->clip_mask);
1017 if (draw_info->clipping_mask != (Image *) NULL)
1018 draw_info->clipping_mask=DestroyImage(draw_info->clipping_mask);
1019 if (draw_info->composite_mask != (Image *) NULL)
1020 draw_info->composite_mask=DestroyImage(draw_info->composite_mask);
1021 if (draw_info->image_info != (ImageInfo *) NULL)
1022 draw_info->image_info=DestroyImageInfo(draw_info->image_info);
1023 draw_info->signature=(~MagickCoreSignature);
1024 draw_info=(DrawInfo *) RelinquishMagickMemory(draw_info);
1025 return(draw_info);
1026}
1027␌
1028/*
1029%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1030% %
1031% %
1032% %
1033% D r a w A f f i n e I m a g e %
1034% %
1035% %
1036% %
1037%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1038%
1039% DrawAffineImage() composites the source over the destination image as
1040% dictated by the affine transform.
1041%
1042% The format of the DrawAffineImage method is:
1043%
1044% MagickBooleanType DrawAffineImage(Image *image,const Image *source,
1045% const AffineMatrix *affine)
1046%
1047% A description of each parameter follows:
1048%
1049% o image: the image.
1050%
1051% o source: the source image.
1052%
1053% o affine: the affine transform.
1054%
1055*/
1056
1057static SegmentInfo AffineEdge(const Image *image,const AffineMatrix *affine,
1058 const double y,const SegmentInfo *edge)
1059{
1060 double
1061 intercept,
1062 z;
1063
1064 double
1065 x;
1066
1067 SegmentInfo
1068 inverse_edge;
1069
1070 /*
1071 Determine left and right edges.
1072 */
1073 inverse_edge.x1=edge->x1;
1074 inverse_edge.y1=edge->y1;
1075 inverse_edge.x2=edge->x2;
1076 inverse_edge.y2=edge->y2;
1077 z=affine->ry*y+affine->tx;
1078 if (affine->sx >= MagickEpsilon)
1079 {
1080 intercept=(-z/affine->sx);
1081 x=intercept;
1082 if (x > inverse_edge.x1)
1083 inverse_edge.x1=x;
1084 intercept=(-z+(double) image->columns)/affine->sx;
1085 x=intercept;
1086 if (x < inverse_edge.x2)
1087 inverse_edge.x2=x;
1088 }
1089 else
1090 if (affine->sx < -MagickEpsilon)
1091 {
1092 intercept=(-z+(double) image->columns)/affine->sx;
1093 x=intercept;
1094 if (x > inverse_edge.x1)
1095 inverse_edge.x1=x;
1096 intercept=(-z/affine->sx);
1097 x=intercept;
1098 if (x < inverse_edge.x2)
1099 inverse_edge.x2=x;
1100 }
1101 else
1102 if ((z < 0.0) || ((size_t) floor(z+0.5) >= image->columns))
1103 {
1104 inverse_edge.x2=edge->x1;
1105 return(inverse_edge);
1106 }
1107 /*
1108 Determine top and bottom edges.
1109 */
1110 z=affine->sy*y+affine->ty;
1111 if (affine->rx >= MagickEpsilon)
1112 {
1113 intercept=(-z/affine->rx);
1114 x=intercept;
1115 if (x > inverse_edge.x1)
1116 inverse_edge.x1=x;
1117 intercept=(-z+(double) image->rows)/affine->rx;
1118 x=intercept;
1119 if (x < inverse_edge.x2)
1120 inverse_edge.x2=x;
1121 }
1122 else
1123 if (affine->rx < -MagickEpsilon)
1124 {
1125 intercept=(-z+(double) image->rows)/affine->rx;
1126 x=intercept;
1127 if (x > inverse_edge.x1)
1128 inverse_edge.x1=x;
1129 intercept=(-z/affine->rx);
1130 x=intercept;
1131 if (x < inverse_edge.x2)
1132 inverse_edge.x2=x;
1133 }
1134 else
1135 if ((z < 0.0) || ((size_t) floor(z+0.5) >= image->rows))
1136 {
1137 inverse_edge.x2=edge->x2;
1138 return(inverse_edge);
1139 }
1140 return(inverse_edge);
1141}
1142
1143static AffineMatrix InverseAffineMatrix(const AffineMatrix *affine)
1144{
1145 AffineMatrix
1146 inverse_affine;
1147
1148 double
1149 determinant;
1150
1151 determinant=MagickSafeReciprocal(affine->sx*affine->sy-affine->rx*
1152 affine->ry);
1153 inverse_affine.sx=determinant*affine->sy;
1154 inverse_affine.rx=determinant*(-affine->rx);
1155 inverse_affine.ry=determinant*(-affine->ry);
1156 inverse_affine.sy=determinant*affine->sx;
1157 inverse_affine.tx=(-affine->tx)*inverse_affine.sx-affine->ty*
1158 inverse_affine.ry;
1159 inverse_affine.ty=(-affine->tx)*inverse_affine.rx-affine->ty*
1160 inverse_affine.sy;
1161 return(inverse_affine);
1162}
1163
1164MagickExport MagickBooleanType DrawAffineImage(Image *image,
1165 const Image *source,const AffineMatrix *affine)
1166{
1167 AffineMatrix
1168 inverse_affine;
1169
1170 CacheView
1171 *image_view,
1172 *source_view;
1173
1174 ExceptionInfo
1175 *exception;
1176
1177 MagickBooleanType
1178 status;
1179
1180 MagickPixelPacket
1181 zero;
1182
1183 PointInfo
1184 extent[4],
1185 min,
1186 max,
1187 point;
1188
1189 ssize_t
1190 i;
1191
1192 SegmentInfo
1193 edge;
1194
1195 ssize_t
1196 start,
1197 stop,
1198 y;
1199
1200 /*
1201 Determine bounding box.
1202 */
1203 assert(image != (Image *) NULL);
1204 assert(image->signature == MagickCoreSignature);
1205 assert(source != (const Image *) NULL);
1206 assert(source->signature == MagickCoreSignature);
1207 if (IsEventLogging() != MagickFalse)
1208 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1209 assert(affine != (AffineMatrix *) NULL);
1210 extent[0].x=0.0;
1211 extent[0].y=0.0;
1212 extent[1].x=(double) source->columns;
1213 extent[1].y=0.0;
1214 extent[2].x=(double) source->columns;
1215 extent[2].y=(double) source->rows;
1216 extent[3].x=0.0;
1217 extent[3].y=(double) source->rows;
1218 for (i=0; i < 4; i++)
1219 {
1220 point=extent[i];
1221 extent[i].x=point.x*affine->sx+point.y*affine->ry+affine->tx;
1222 extent[i].y=point.x*affine->rx+point.y*affine->sy+affine->ty;
1223 }
1224 min=extent[0];
1225 max=extent[0];
1226 for (i=1; i < 4; i++)
1227 {
1228 if (min.x > extent[i].x)
1229 min.x=extent[i].x;
1230 if (min.y > extent[i].y)
1231 min.y=extent[i].y;
1232 if (max.x < extent[i].x)
1233 max.x=extent[i].x;
1234 if (max.y < extent[i].y)
1235 max.y=extent[i].y;
1236 }
1237 /*
1238 Affine transform image.
1239 */
1240 if (SetImageStorageClass(image,DirectClass) == MagickFalse)
1241 return(MagickFalse);
1242 status=MagickTrue;
1243 edge.x1=min.x;
1244 edge.y1=min.y;
1245 edge.x2=max.x;
1246 edge.y2=max.y;
1247 inverse_affine=InverseAffineMatrix(affine);
1248 if (edge.y1 < 0.0)
1249 edge.y1=0.0;
1250 if (edge.y2 > (image->rows-1.0))
1251 edge.y2=image->rows-1.0;
1252 GetMagickPixelPacket(image,&zero);
1253 exception=(&image->exception);
1254 start=CastDoubleToLong(ceil(edge.y1-0.5));
1255 stop=CastDoubleToLong(floor(edge.y2+0.5));
1256 source_view=AcquireVirtualCacheView(source,exception);
1257 image_view=AcquireAuthenticCacheView(image,exception);
1258#if defined(MAGICKCORE_OPENMP_SUPPORT)
1259 #pragma omp parallel for schedule(static) shared(status) \
1260 magick_number_threads(source,image,stop-start,1)
1261#endif
1262 for (y=start; y <= stop; y++)
1263 {
1264 IndexPacket
1265 *magick_restrict indexes;
1266
1267 MagickPixelPacket
1268 composite,
1269 pixel;
1270
1271 PointInfo
1272 point;
1273
1274 PixelPacket
1275 *magick_restrict q;
1276
1277 SegmentInfo
1278 inverse_edge;
1279
1280 ssize_t
1281 x,
1282 x_offset;
1283
1284 if (status == MagickFalse)
1285 continue;
1286 inverse_edge=AffineEdge(source,&inverse_affine,(double) y,&edge);
1287 if (inverse_edge.x2 < inverse_edge.x1)
1288 continue;
1289 if (inverse_edge.x1 < 0.0)
1290 inverse_edge.x1=0.0;
1291 if (inverse_edge.x2 > image->columns-1.0)
1292 inverse_edge.x2=image->columns-1.0;
1293 q=GetCacheViewAuthenticPixels(image_view,CastDoubleToLong(
1294 ceil(inverse_edge.x1-0.5)),y,(size_t) CastDoubleToLong(floor(
1295 inverse_edge.x2+0.5)-ceil(inverse_edge.x1-0.5)+1),1,exception);
1296 if (q == (PixelPacket *) NULL)
1297 continue;
1298 indexes=GetCacheViewAuthenticIndexQueue(image_view);
1299 pixel=zero;
1300 composite=zero;
1301 x_offset=0;
1302 for (x=CastDoubleToLong(ceil(inverse_edge.x1-0.5));
1303 x <= CastDoubleToLong(floor(inverse_edge.x2+0.5)); x++)
1304 {
1305 point.x=(double) x*inverse_affine.sx+y*inverse_affine.ry+
1306 inverse_affine.tx;
1307 point.y=(double) x*inverse_affine.rx+y*inverse_affine.sy+
1308 inverse_affine.ty;
1309 status=InterpolateMagickPixelPacket(source,source_view,
1310 UndefinedInterpolatePixel,point.x,point.y,&pixel,exception);
1311 if (status == MagickFalse)
1312 break;
1313 SetMagickPixelPacket(image,q,indexes+x_offset,&composite);
1314 MagickPixelCompositeOver(&pixel,pixel.opacity,&composite,
1315 composite.opacity,&composite);
1316 SetPixelPacket(image,&composite,q,indexes+x_offset);
1317 x_offset++;
1318 q++;
1319 }
1320 if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
1321 status=MagickFalse;
1322 }
1323 source_view=DestroyCacheView(source_view);
1324 image_view=DestroyCacheView(image_view);
1325 return(status);
1326}
1327␌
1328/*
1329%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1330% %
1331% %
1332% %
1333+ D r a w B o u n d i n g R e c t a n g l e s %
1334% %
1335% %
1336% %
1337%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1338%
1339% DrawBoundingRectangles() draws the bounding rectangles on the image. This
1340% is only useful for developers debugging the rendering algorithm.
1341%
1342% The format of the DrawBoundingRectangles method is:
1343%
1344% MagickBooleanType DrawBoundingRectangles(Image *image,
1345% const DrawInfo *draw_info,PolygonInfo *polygon_info)
1346%
1347% A description of each parameter follows:
1348%
1349% o image: the image.
1350%
1351% o draw_info: the draw info.
1352%
1353% o polygon_info: Specifies a pointer to a PolygonInfo structure.
1354%
1355*/
1356
1357static MagickBooleanType DrawBoundingRectangles(Image *image,
1358 const DrawInfo *draw_info,const PolygonInfo *polygon_info)
1359{
1360 double
1361 mid;
1362
1363 DrawInfo
1364 *clone_info;
1365
1366 MagickStatusType
1367 status;
1368
1369 PointInfo
1370 end,
1371 resolution,
1372 start;
1373
1374 PrimitiveInfo
1375 primitive_info[6];
1376
1377 ssize_t
1378 i;
1379
1380 SegmentInfo
1381 bounds;
1382
1383 ssize_t
1384 coordinates;
1385
1386 (void) memset(primitive_info,0,sizeof(primitive_info));
1387 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1388 status=QueryColorDatabase("#0000",&clone_info->fill,&image->exception);
1389 if (status == MagickFalse)
1390 {
1391 clone_info=DestroyDrawInfo(clone_info);
1392 return(MagickFalse);
1393 }
1394 resolution.x=96.0;
1395 resolution.y=96.0;
1396 if (clone_info->density != (char *) NULL)
1397 {
1398 GeometryInfo
1399 geometry_info;
1400
1401 MagickStatusType
1402 flags;
1403
1404 flags=ParseGeometry(clone_info->density,&geometry_info);
1405 if ((flags & RhoValue) != 0)
1406 resolution.x=geometry_info.rho;
1407 resolution.y=resolution.x;
1408 if ((flags & SigmaValue) != 0)
1409 resolution.y=geometry_info.sigma;
1410 }
1411 mid=(resolution.x/96.0)*ExpandAffine(&clone_info->affine)*
1412 clone_info->stroke_width/2.0;
1413 bounds.x1=0.0;
1414 bounds.y1=0.0;
1415 bounds.x2=0.0;
1416 bounds.y2=0.0;
1417 if (polygon_info != (PolygonInfo *) NULL)
1418 {
1419 bounds=polygon_info->edges[0].bounds;
1420 for (i=1; i < (ssize_t) polygon_info->number_edges; i++)
1421 {
1422 if (polygon_info->edges[i].bounds.x1 < (double) bounds.x1)
1423 bounds.x1=polygon_info->edges[i].bounds.x1;
1424 if (polygon_info->edges[i].bounds.y1 < (double) bounds.y1)
1425 bounds.y1=polygon_info->edges[i].bounds.y1;
1426 if (polygon_info->edges[i].bounds.x2 > (double) bounds.x2)
1427 bounds.x2=polygon_info->edges[i].bounds.x2;
1428 if (polygon_info->edges[i].bounds.y2 > (double) bounds.y2)
1429 bounds.y2=polygon_info->edges[i].bounds.y2;
1430 }
1431 bounds.x1-=mid;
1432 bounds.x1=bounds.x1 < 0.0 ? 0.0 : bounds.x1 >= (double)
1433 image->columns ? (double) image->columns-1 : bounds.x1;
1434 bounds.y1-=mid;
1435 bounds.y1=bounds.y1 < 0.0 ? 0.0 : bounds.y1 >= (double)
1436 image->rows ? (double) image->rows-1 : bounds.y1;
1437 bounds.x2+=mid;
1438 bounds.x2=bounds.x2 < 0.0 ? 0.0 : bounds.x2 >= (double)
1439 image->columns ? (double) image->columns-1 : bounds.x2;
1440 bounds.y2+=mid;
1441 bounds.y2=bounds.y2 < 0.0 ? 0.0 : bounds.y2 >= (double)
1442 image->rows ? (double) image->rows-1 : bounds.y2;
1443 for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
1444 {
1445 if (polygon_info->edges[i].direction != 0)
1446 status=QueryColorDatabase("#f00",&clone_info->stroke,
1447 &image->exception);
1448 else
1449 status=QueryColorDatabase("#0f0",&clone_info->stroke,
1450 &image->exception);
1451 if (status == MagickFalse)
1452 break;
1453 start.x=(double) (polygon_info->edges[i].bounds.x1-mid);
1454 start.y=(double) (polygon_info->edges[i].bounds.y1-mid);
1455 end.x=(double) (polygon_info->edges[i].bounds.x2+mid);
1456 end.y=(double) (polygon_info->edges[i].bounds.y2+mid);
1457 primitive_info[0].primitive=RectanglePrimitive;
1458 status&=TraceRectangle(primitive_info,start,end);
1459 primitive_info[0].method=ReplaceMethod;
1460 coordinates=(ssize_t) primitive_info[0].coordinates;
1461 primitive_info[coordinates].primitive=UndefinedPrimitive;
1462 status=DrawPrimitive(image,clone_info,primitive_info);
1463 if (status == MagickFalse)
1464 break;
1465 }
1466 if (i < (ssize_t) polygon_info->number_edges)
1467 {
1468 clone_info=DestroyDrawInfo(clone_info);
1469 return(status == 0 ? MagickFalse : MagickTrue);
1470 }
1471 }
1472 status=QueryColorDatabase("#00f",&clone_info->stroke,&image->exception);
1473 if (status == MagickFalse)
1474 {
1475 clone_info=DestroyDrawInfo(clone_info);
1476 return(MagickFalse);
1477 }
1478 start.x=(double) (bounds.x1-mid);
1479 start.y=(double) (bounds.y1-mid);
1480 end.x=(double) (bounds.x2+mid);
1481 end.y=(double) (bounds.y2+mid);
1482 primitive_info[0].primitive=RectanglePrimitive;
1483 status&=TraceRectangle(primitive_info,start,end);
1484 primitive_info[0].method=ReplaceMethod;
1485 coordinates=(ssize_t) primitive_info[0].coordinates;
1486 primitive_info[coordinates].primitive=UndefinedPrimitive;
1487 status=DrawPrimitive(image,clone_info,primitive_info);
1488 clone_info=DestroyDrawInfo(clone_info);
1489 return(status == 0 ? MagickFalse : MagickTrue);
1490}
1491␌
1492/*
1493%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1494% %
1495% %
1496% %
1497% D r a w C l i p P a t h %
1498% %
1499% %
1500% %
1501%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1502%
1503% DrawClipPath() draws the clip path on the image mask.
1504%
1505% The format of the DrawClipPath method is:
1506%
1507% MagickBooleanType DrawClipPath(Image *image,const DrawInfo *draw_info,
1508% const char *id)
1509%
1510% A description of each parameter follows:
1511%
1512% o image: the image.
1513%
1514% o draw_info: the draw info.
1515%
1516% o id: the clip path id.
1517%
1518*/
1519MagickExport MagickBooleanType DrawClipPath(Image *image,
1520 const DrawInfo *draw_info,const char *id)
1521{
1522 const char
1523 *clip_path;
1524
1525 Image
1526 *clipping_mask;
1527
1528 MagickBooleanType
1529 status;
1530
1531 clip_path=GetImageArtifact(image,id);
1532 if (clip_path == (const char *) NULL)
1533 return(MagickFalse);
1534 clipping_mask=DrawClippingMask(image,draw_info,draw_info->clip_mask,clip_path,
1535 &image->exception);
1536 if (clipping_mask == (Image *) NULL)
1537 return(MagickFalse);
1538 status=SetImageClipMask(image,clipping_mask);
1539 clipping_mask=DestroyImage(clipping_mask);
1540 return(status);
1541}
1542␌
1543/*
1544%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1545% %
1546% %
1547% %
1548% D r a w C l i p p i n g M a s k %
1549% %
1550% %
1551% %
1552%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1553%
1554% DrawClippingMask() draws the clip path and returns it as an image clipping
1555% mask.
1556%
1557% The format of the DrawClippingMask method is:
1558%
1559% Image *DrawClippingMask(Image *image,const DrawInfo *draw_info,
1560% const char *id,const char *clip_path,ExceptionInfo *exception)
1561%
1562% A description of each parameter follows:
1563%
1564% o image: the image.
1565%
1566% o draw_info: the draw info.
1567%
1568% o id: the clip path id.
1569%
1570% o clip_path: the clip path.
1571%
1572% o exception: return any errors or warnings in this structure.
1573%
1574*/
1575static Image *DrawClippingMask(Image *image,const DrawInfo *draw_info,
1576 const char *id,const char *clip_path,ExceptionInfo *exception)
1577{
1578 DrawInfo
1579 *clone_info;
1580
1581 Image
1582 *clip_mask;
1583
1584 MagickStatusType
1585 status;
1586
1587 /*
1588 Draw a clip path.
1589 */
1590 assert(image != (Image *) NULL);
1591 assert(image->signature == MagickCoreSignature);
1592 assert(draw_info != (const DrawInfo *) NULL);
1593 if (IsEventLogging() != MagickFalse)
1594 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1595 clip_mask=AcquireImage((const ImageInfo *) NULL);
1596 status=SetImageExtent(clip_mask,image->columns,image->rows);
1597 if (status == MagickFalse)
1598 return(DestroyImage(clip_mask));
1599 status=SetImageClipMask(image,(Image *) NULL);
1600 status=QueryColorCompliance("#0000",AllCompliance,
1601 &clip_mask->background_color,exception);
1602 clip_mask->background_color.opacity=(Quantum) TransparentOpacity;
1603 status=SetImageBackgroundColor(clip_mask);
1604 if (draw_info->debug != MagickFalse)
1605 (void) LogMagickEvent(DrawEvent,GetMagickModule(),"\nbegin clip-path %s",
1606 id);
1607 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1608 (void) CloneString(&clone_info->primitive,clip_path);
1609 status=QueryColorCompliance("#ffffff",AllCompliance,&clone_info->fill,
1610 exception);
1611 if (clone_info->clip_mask != (char *) NULL)
1612 clone_info->clip_mask=DestroyString(clone_info->clip_mask);
1613 (void) QueryColorCompliance("#00000000",AllCompliance,&clone_info->stroke,
1614 exception);
1615 clone_info->stroke_width=0.0;
1616 clone_info->opacity=OpaqueOpacity;
1617 clone_info->clip_path=MagickTrue;
1618 status=RenderMVGContent(clip_mask,clone_info,0);
1619 clone_info=DestroyDrawInfo(clone_info);
1620 status&=SeparateImageChannel(clip_mask,TrueAlphaChannel);
1621 if (draw_info->compliance != SVGCompliance)
1622 status&=NegateImage(clip_mask,MagickFalse);
1623 if (status == MagickFalse)
1624 clip_mask=DestroyImage(clip_mask);
1625 if (draw_info->debug != MagickFalse)
1626 (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end clip-path");
1627 return(clip_mask);
1628}
1629␌
1630/*
1631%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1632% %
1633% %
1634% %
1635% D r a w C o m p o s i t e M a s k %
1636% %
1637% %
1638% %
1639%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1640%
1641% DrawCompositeMask() draws the mask path and returns it as an image mask.
1642%
1643% The format of the DrawCompositeMask method is:
1644%
1645% Image *DrawCompositeMask(Image *image,const DrawInfo *draw_info,
1646% const char *id,const char *mask_path,ExceptionInfo *exception)
1647%
1648% A description of each parameter follows:
1649%
1650% o image: the image.
1651%
1652% o draw_info: the draw info.
1653%
1654% o id: the mask path id.
1655%
1656% o mask_path: the mask path.
1657%
1658% o exception: return any errors or warnings in this structure.
1659%
1660*/
1661static Image *DrawCompositeMask(Image *image,const DrawInfo *draw_info,
1662 const char *id,const char *mask_path,ExceptionInfo *exception)
1663{
1664 Image
1665 *composite_mask;
1666
1667 DrawInfo
1668 *clone_info;
1669
1670 MagickStatusType
1671 status;
1672
1673 /*
1674 Draw a mask path.
1675 */
1676 assert(image != (Image *) NULL);
1677 assert(image->signature == MagickCoreSignature);
1678 assert(draw_info != (const DrawInfo *) NULL);
1679 if (IsEventLogging() != MagickFalse)
1680 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1681 composite_mask=AcquireImage((const ImageInfo *) NULL);
1682 status=SetImageExtent(composite_mask,image->columns,image->rows);
1683 if (status == MagickFalse)
1684 return(DestroyImage(composite_mask));
1685 status=SetImageMask(image,(Image *) NULL);
1686 status=QueryColorCompliance("#0000",AllCompliance,
1687 &composite_mask->background_color,exception);
1688 composite_mask->background_color.opacity=(Quantum) TransparentOpacity;
1689 (void) SetImageBackgroundColor(composite_mask);
1690 if (draw_info->debug != MagickFalse)
1691 (void) LogMagickEvent(DrawEvent,GetMagickModule(),"\nbegin mask-path %s",
1692 id);
1693 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1694 (void) CloneString(&clone_info->primitive,mask_path);
1695 status=QueryColorCompliance("#ffffff",AllCompliance,&clone_info->fill,
1696 exception);
1697 status=QueryColorCompliance("#00000000",AllCompliance,&clone_info->stroke,
1698 exception);
1699 clone_info->stroke_width=0.0;
1700 clone_info->opacity=OpaqueOpacity;
1701 status=RenderMVGContent(composite_mask,clone_info,0);
1702 clone_info=DestroyDrawInfo(clone_info);
1703 status&=SeparateImageChannel(composite_mask,TrueAlphaChannel);
1704 status&=NegateImage(composite_mask,MagickFalse);
1705 if (status == MagickFalse)
1706 composite_mask=DestroyImage(composite_mask);
1707 if (draw_info->debug != MagickFalse)
1708 (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end mask-path");
1709 return(composite_mask);
1710}
1711␌
1712/*
1713%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1714% %
1715% %
1716% %
1717+ D r a w D a s h P o l y g o n %
1718% %
1719% %
1720% %
1721%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1722%
1723% DrawDashPolygon() draws a dashed polygon (line, rectangle, ellipse) on the
1724% image while respecting the dash offset and dash pattern attributes.
1725%
1726% The format of the DrawDashPolygon method is:
1727%
1728% MagickBooleanType DrawDashPolygon(const DrawInfo *draw_info,
1729% const PrimitiveInfo *primitive_info,Image *image)
1730%
1731% A description of each parameter follows:
1732%
1733% o draw_info: the draw info.
1734%
1735% o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
1736%
1737% o image: the image.
1738%
1739%
1740*/
1741static MagickBooleanType DrawDashPolygon(const DrawInfo *draw_info,
1742 const PrimitiveInfo *primitive_info,Image *image)
1743{
1744 double
1745 dx,
1746 dy,
1747 length,
1748 maximum_length,
1749 offset,
1750 scale,
1751 total_length;
1752
1753 DrawInfo
1754 *clone_info;
1755
1756 MagickStatusType
1757 status;
1758
1759 PrimitiveInfo
1760 *dash_polygon;
1761
1762 ssize_t
1763 i;
1764
1765 size_t
1766 number_vertices;
1767
1768 ssize_t
1769 j,
1770 n;
1771
1772 assert(draw_info != (const DrawInfo *) NULL);
1773 if (draw_info->debug != MagickFalse)
1774 (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-dash");
1775 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
1776 number_vertices=(size_t) i;
1777 dash_polygon=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
1778 (2UL*number_vertices+32UL),sizeof(*dash_polygon));
1779 if (dash_polygon == (PrimitiveInfo *) NULL)
1780 {
1781 (void) ThrowMagickException(&image->exception,GetMagickModule(),
1782 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
1783 return(MagickFalse);
1784 }
1785 (void) memset(dash_polygon,0,(2UL*number_vertices+32UL)*
1786 sizeof(*dash_polygon));
1787 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1788 clone_info->miterlimit=0;
1789 dash_polygon[0]=primitive_info[0];
1790 dash_polygon[0].closed_subpath=MagickFalse;
1791 scale=ExpandAffine(&draw_info->affine);
1792 length=scale*draw_info->dash_pattern[0];
1793 offset=fabs(draw_info->dash_offset) >= MagickEpsilon ?
1794 scale*draw_info->dash_offset : 0.0;
1795 j=1;
1796 for (n=0; offset > 0.0; j=0)
1797 {
1798 if (draw_info->dash_pattern[n] <= 0.0)
1799 break;
1800 length=scale*(draw_info->dash_pattern[n]+(n == 0 ? -0.5 : 0.5));
1801 if (offset > length)
1802 {
1803 offset-=length;
1804 n++;
1805 length=scale*draw_info->dash_pattern[n];
1806 continue;
1807 }
1808 if (offset < length)
1809 {
1810 length-=offset;
1811 offset=0.0;
1812 break;
1813 }
1814 offset=0.0;
1815 n++;
1816 }
1817 status=MagickTrue;
1818 maximum_length=0.0;
1819 total_length=0.0;
1820 for (i=1; (i < (ssize_t) number_vertices) && (length >= 0.0); i++)
1821 {
1822 dx=primitive_info[i].point.x-primitive_info[i-1].point.x;
1823 dy=primitive_info[i].point.y-primitive_info[i-1].point.y;
1824 maximum_length=hypot(dx,dy);
1825 if (maximum_length > (double) (MaxBezierCoordinates >> 2))
1826 continue;
1827 if (fabs(length) < MagickEpsilon)
1828 {
1829 if (fabs(draw_info->dash_pattern[n]) >= MagickEpsilon)
1830 n++;
1831 if (fabs(draw_info->dash_pattern[n]) < MagickEpsilon)
1832 n=0;
1833 length=scale*draw_info->dash_pattern[n];
1834 }
1835 for (total_length=0.0; (length >= 0.0) && (maximum_length >= (total_length+length)); )
1836 {
1837 total_length+=length;
1838 if ((n & 0x01) != 0)
1839 {
1840 dash_polygon[0]=primitive_info[0];
1841 dash_polygon[0].closed_subpath=MagickFalse;
1842 dash_polygon[0].point.x=(double) (primitive_info[i-1].point.x+dx*
1843 total_length*MagickSafeReciprocal(maximum_length));
1844 dash_polygon[0].point.y=(double) (primitive_info[i-1].point.y+dy*
1845 total_length*MagickSafeReciprocal(maximum_length));
1846 j=1;
1847 }
1848 else
1849 {
1850 if ((j+1) > (ssize_t) number_vertices)
1851 break;
1852 dash_polygon[j]=primitive_info[i-1];
1853 dash_polygon[j].closed_subpath=MagickFalse;
1854 dash_polygon[j].point.x=(double) (primitive_info[i-1].point.x+dx*
1855 total_length*MagickSafeReciprocal(maximum_length));
1856 dash_polygon[j].point.y=(double) (primitive_info[i-1].point.y+dy*
1857 total_length*MagickSafeReciprocal(maximum_length));
1858 dash_polygon[j].coordinates=1;
1859 j++;
1860 dash_polygon[0].coordinates=(size_t) j;
1861 dash_polygon[j].primitive=UndefinedPrimitive;
1862 status&=DrawStrokePolygon(image,clone_info,dash_polygon);
1863 if (status == MagickFalse)
1864 break;
1865 }
1866 if (fabs(draw_info->dash_pattern[n]) >= MagickEpsilon)
1867 n++;
1868 if (fabs(draw_info->dash_pattern[n]) < MagickEpsilon)
1869 n=0;
1870 length=scale*draw_info->dash_pattern[n];
1871 }
1872 length-=(maximum_length-total_length);
1873 if ((n & 0x01) != 0)
1874 continue;
1875 dash_polygon[j]=primitive_info[i];
1876 dash_polygon[j].coordinates=1;
1877 j++;
1878 }
1879 if ((status != MagickFalse) && (total_length < maximum_length) &&
1880 ((n & 0x01) == 0) && (j > 1))
1881 {
1882 dash_polygon[j]=primitive_info[i-1];
1883 dash_polygon[j].closed_subpath=MagickFalse;
1884 dash_polygon[j].point.x+=MagickEpsilon;
1885 dash_polygon[j].point.y+=MagickEpsilon;
1886 dash_polygon[j].coordinates=1;
1887 j++;
1888 dash_polygon[0].coordinates=(size_t) j;
1889 dash_polygon[j].primitive=UndefinedPrimitive;
1890 status&=DrawStrokePolygon(image,clone_info,dash_polygon);
1891 }
1892 dash_polygon=(PrimitiveInfo *) RelinquishMagickMemory(dash_polygon);
1893 clone_info=DestroyDrawInfo(clone_info);
1894 if (draw_info->debug != MagickFalse)
1895 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-dash");
1896 return(status != 0 ? MagickTrue : MagickFalse);
1897}
1898␌
1899/*
1900%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1901% %
1902% %
1903% %
1904% D r a w G r a d i e n t I m a g e %
1905% %
1906% %
1907% %
1908%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1909%
1910% DrawGradientImage() draws a linear gradient on the image.
1911%
1912% The format of the DrawGradientImage method is:
1913%
1914% MagickBooleanType DrawGradientImage(Image *image,
1915% const DrawInfo *draw_info)
1916%
1917% A description of each parameter follows:
1918%
1919% o image: the image.
1920%
1921% o draw_info: the draw info.
1922%
1923*/
1924
1925static inline double GetStopColorOffset(const GradientInfo *gradient,
1926 const ssize_t x,const ssize_t y)
1927{
1928 switch (gradient->type)
1929 {
1930 case UndefinedGradient:
1931 case LinearGradient:
1932 {
1933 double
1934 gamma,
1935 length,
1936 offset,
1937 scale;
1938
1939 PointInfo
1940 p,
1941 q;
1942
1943 const SegmentInfo
1944 *gradient_vector;
1945
1946 gradient_vector=(&gradient->gradient_vector);
1947 p.x=gradient_vector->x2-gradient_vector->x1;
1948 p.y=gradient_vector->y2-gradient_vector->y1;
1949 q.x=(double) x-gradient_vector->x1;
1950 q.y=(double) y-gradient_vector->y1;
1951 length=sqrt(q.x*q.x+q.y*q.y);
1952 gamma=sqrt(p.x*p.x+p.y*p.y)*length;
1953 gamma=MagickSafeReciprocal(gamma);
1954 scale=p.x*q.x+p.y*q.y;
1955 offset=gamma*scale*length;
1956 return(offset);
1957 }
1958 case RadialGradient:
1959 {
1960 PointInfo
1961 v;
1962
1963 if (gradient->spread == RepeatSpread)
1964 {
1965 v.x=(double) x-gradient->center.x;
1966 v.y=(double) y-gradient->center.y;
1967 return(sqrt(v.x*v.x+v.y*v.y));
1968 }
1969 v.x=(double) (((x-gradient->center.x)*cos(DegreesToRadians(
1970 gradient->angle)))+((y-gradient->center.y)*sin(DegreesToRadians(
1971 gradient->angle))))*MagickSafeReciprocal(gradient->radii.x);
1972 v.y=(double) (((x-gradient->center.x)*sin(DegreesToRadians(
1973 gradient->angle)))-((y-gradient->center.y)*cos(DegreesToRadians(
1974 gradient->angle))))*MagickSafeReciprocal(gradient->radii.y);
1975 return(sqrt(v.x*v.x+v.y*v.y));
1976 }
1977 }
1978 return(0.0);
1979}
1980
1981MagickExport MagickBooleanType DrawGradientImage(Image *image,
1982 const DrawInfo *draw_info)
1983{
1984 CacheView
1985 *image_view;
1986
1987 const GradientInfo
1988 *gradient;
1989
1990 const SegmentInfo
1991 *gradient_vector;
1992
1993 double
1994 length;
1995
1996 ExceptionInfo
1997 *exception;
1998
1999 MagickBooleanType
2000 status;
2001
2002 MagickPixelPacket
2003 zero;
2004
2005 PointInfo
2006 point;
2007
2008 RectangleInfo
2009 bounding_box;
2010
2011 ssize_t
2012 height,
2013 y;
2014
2015 /*
2016 Draw linear or radial gradient on image.
2017 */
2018 assert(image != (Image *) NULL);
2019 assert(image->signature == MagickCoreSignature);
2020 assert(draw_info != (const DrawInfo *) NULL);
2021 if (IsEventLogging() != MagickFalse)
2022 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2023 gradient=(&draw_info->gradient);
2024 gradient_vector=(&gradient->gradient_vector);
2025 point.x=gradient_vector->x2-gradient_vector->x1;
2026 point.y=gradient_vector->y2-gradient_vector->y1;
2027 length=sqrt(point.x*point.x+point.y*point.y);
2028 bounding_box=gradient->bounding_box;
2029 status=MagickTrue;
2030 exception=(&image->exception);
2031 GetMagickPixelPacket(image,&zero);
2032 image_view=AcquireAuthenticCacheView(image,exception);
2033 height=(size_t) (bounding_box.y+bounding_box.height);
2034#if defined(MAGICKCORE_OPENMP_SUPPORT)
2035 #pragma omp parallel for schedule(static) shared(status) \
2036 magick_number_threads(image,image,height,1)
2037#endif
2038 for (y=bounding_box.y; y < (ssize_t) height; y++)
2039 {
2040 double
2041 alpha,
2042 offset;
2043
2044 MagickPixelPacket
2045 composite,
2046 pixel;
2047
2048 IndexPacket
2049 *magick_restrict indexes;
2050
2051 PixelPacket
2052 *magick_restrict q;
2053
2054 ssize_t
2055 i,
2056 j,
2057 width,
2058 x;
2059
2060 if (status == MagickFalse)
2061 continue;
2062 q=GetCacheViewAuthenticPixels(image_view,bounding_box.x,y,(size_t)
2063 bounding_box.width,1,exception);
2064 if (q == (PixelPacket *) NULL)
2065 {
2066 status=MagickFalse;
2067 continue;
2068 }
2069 indexes=GetCacheViewAuthenticIndexQueue(image_view);
2070 pixel=zero;
2071 composite=zero;
2072 offset=GetStopColorOffset(gradient,0,y);
2073 if (gradient->type != RadialGradient)
2074 offset*=MagickSafeReciprocal(length);
2075 width=(size_t) (bounding_box.x+bounding_box.width);
2076 for (x=bounding_box.x; x < (ssize_t) width; x++)
2077 {
2078 SetMagickPixelPacket(image,q,indexes+x,&pixel);
2079 switch (gradient->spread)
2080 {
2081 case UndefinedSpread:
2082 case PadSpread:
2083 {
2084 if ((x != CastDoubleToLong(ceil(gradient_vector->x1-0.5))) ||
2085 (y != CastDoubleToLong(ceil(gradient_vector->y1-0.5))))
2086 {
2087 offset=GetStopColorOffset(gradient,x,y);
2088 if (gradient->type != RadialGradient)
2089 offset*=MagickSafeReciprocal(length);
2090 }
2091 for (i=0; i < (ssize_t) gradient->number_stops; i++)
2092 if (offset < gradient->stops[i].offset)
2093 break;
2094 if ((offset < 0.0) || (i == 0))
2095 composite=gradient->stops[0].color;
2096 else
2097 if ((offset > 1.0) || (i == (ssize_t) gradient->number_stops))
2098 composite=gradient->stops[gradient->number_stops-1].color;
2099 else
2100 {
2101 j=i;
2102 i--;
2103 alpha=(offset-gradient->stops[i].offset)/
2104 (gradient->stops[j].offset-gradient->stops[i].offset);
2105 MagickPixelCompositeBlend(&gradient->stops[i].color,1.0-alpha,
2106 &gradient->stops[j].color,alpha,&composite);
2107 }
2108 break;
2109 }
2110 case ReflectSpread:
2111 {
2112 if ((x != CastDoubleToLong(ceil(gradient_vector->x1-0.5))) ||
2113 (y != CastDoubleToLong(ceil(gradient_vector->y1-0.5))))
2114 {
2115 offset=GetStopColorOffset(gradient,x,y);
2116 if (gradient->type != RadialGradient)
2117 offset*=MagickSafeReciprocal(length);
2118 }
2119 if (offset < 0.0)
2120 offset=(-offset);
2121 if ((ssize_t) fmod(offset,2.0) == 0)
2122 offset=fmod(offset,1.0);
2123 else
2124 offset=1.0-fmod(offset,1.0);
2125 for (i=0; i < (ssize_t) gradient->number_stops; i++)
2126 if (offset < gradient->stops[i].offset)
2127 break;
2128 if (i == 0)
2129 composite=gradient->stops[0].color;
2130 else
2131 if (i == (ssize_t) gradient->number_stops)
2132 composite=gradient->stops[gradient->number_stops-1].color;
2133 else
2134 {
2135 j=i;
2136 i--;
2137 alpha=(offset-gradient->stops[i].offset)/
2138 (gradient->stops[j].offset-gradient->stops[i].offset);
2139 MagickPixelCompositeBlend(&gradient->stops[i].color,1.0-alpha,
2140 &gradient->stops[j].color,alpha,&composite);
2141 }
2142 break;
2143 }
2144 case RepeatSpread:
2145 {
2146 double
2147 repeat;
2148
2149 MagickBooleanType
2150 antialias;
2151
2152 antialias=MagickFalse;
2153 repeat=0.0;
2154 if ((x != CastDoubleToLong(ceil(gradient_vector->x1-0.5))) ||
2155 (y != CastDoubleToLong(ceil(gradient_vector->y1-0.5))))
2156 {
2157 offset=GetStopColorOffset(gradient,x,y);
2158 if (gradient->type == LinearGradient)
2159 {
2160 repeat=fmod(offset,length);
2161 if (repeat < 0.0)
2162 repeat=length-fmod(-repeat,length);
2163 else
2164 repeat=fmod(offset,length);
2165 antialias=(repeat < length) && ((repeat+1.0) > length) ?
2166 MagickTrue : MagickFalse;
2167 offset=MagickSafeReciprocal(length)*repeat;
2168 }
2169 else
2170 {
2171 repeat=fmod(offset,(double) gradient->radius);
2172 if (repeat < 0.0)
2173 repeat=gradient->radius-fmod(-repeat,
2174 (double) gradient->radius);
2175 else
2176 repeat=fmod(offset,(double) gradient->radius);
2177 antialias=repeat+1.0 > gradient->radius ? MagickTrue :
2178 MagickFalse;
2179 offset=repeat*MagickSafeReciprocal(gradient->radius);
2180 }
2181 }
2182 for (i=0; i < (ssize_t) gradient->number_stops; i++)
2183 if (offset < gradient->stops[i].offset)
2184 break;
2185 if (i == 0)
2186 composite=gradient->stops[0].color;
2187 else
2188 if (i == (ssize_t) gradient->number_stops)
2189 composite=gradient->stops[gradient->number_stops-1].color;
2190 else
2191 {
2192 j=i;
2193 i--;
2194 alpha=(offset-gradient->stops[i].offset)/
2195 (gradient->stops[j].offset-gradient->stops[i].offset);
2196 if (antialias != MagickFalse)
2197 {
2198 if (gradient->type == LinearGradient)
2199 alpha=length-repeat;
2200 else
2201 alpha=gradient->radius-repeat;
2202 i=0;
2203 j=(ssize_t) gradient->number_stops-1L;
2204 }
2205 MagickPixelCompositeBlend(&gradient->stops[i].color,1.0-alpha,
2206 &gradient->stops[j].color,alpha,&composite);
2207 }
2208 break;
2209 }
2210 }
2211 MagickPixelCompositeOver(&composite,composite.opacity,&pixel,
2212 pixel.opacity,&pixel);
2213 SetPixelPacket(image,&pixel,q,indexes+x);
2214 q++;
2215 }
2216 if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
2217 status=MagickFalse;
2218 }
2219 image_view=DestroyCacheView(image_view);
2220 return(status);
2221}
2222␌
2223/*
2224%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2225% %
2226% %
2227% %
2228% D r a w I m a g e %
2229% %
2230% %
2231% %
2232%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2233%
2234% DrawImage() draws a graphic primitive on your image. The primitive
2235% may be represented as a string or filename. Precede the filename with an
2236% "at" sign (@) and the contents of the file are drawn on the image. You
2237% can affect how text is drawn by setting one or more members of the draw
2238% info structure.
2239%
2240% The format of the DrawImage method is:
2241%
2242% MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info)
2243%
2244% A description of each parameter follows:
2245%
2246% o image: the image.
2247%
2248% o draw_info: the draw info.
2249%
2250*/
2251
2252static inline MagickBooleanType CheckPrimitiveExtent(MVGInfo *mvg_info,
2253 const double pad)
2254{
2255 double
2256 proposed_extent;
2257
2258 PrimitiveInfo
2259 *primitive_info;
2260
2261 size_t
2262 extent;
2263
2264 ssize_t
2265 i;
2266
2267 if ((mvg_info == (MVGInfo *) NULL) ||
2268 (mvg_info->primitive_info == (PrimitiveInfo **) NULL) ||
2269 (*mvg_info->primitive_info == (PrimitiveInfo *) NULL) ||
2270 (mvg_info->extent == (size_t *) NULL))
2271 return(MagickFalse);
2272 proposed_extent=mvg_info->offset+pad+PrimitiveExtentPad+1.0;
2273 if ((proposed_extent <= 0.0) || (proposed_extent > (double) MAGICK_SIZE_MAX))
2274 return(MagickFalse);
2275 extent=CastDoubleToSizeT(ceil(proposed_extent));
2276 if (extent <= *mvg_info->extent)
2277 return(MagickTrue);
2278 if (extent > (GetMaxMemoryRequest()/sizeof(PrimitiveInfo)))
2279 return(MagickFalse);
2280 primitive_info=(PrimitiveInfo *) ResizeQuantumMemory(
2281 *mvg_info->primitive_info,extent+1,sizeof(PrimitiveInfo));
2282 if (primitive_info == (PrimitiveInfo *) NULL)
2283 {
2284 /*
2285 Create a stack to unwind; report failure.
2286 */
2287 extent=(size_t) PrimitiveExtentPad;
2288 primitive_info=(PrimitiveInfo *) AcquireCriticalMemory(extent*
2289 sizeof(*primitive_info));
2290 (void) memset(primitive_info,0,extent*sizeof(*primitive_info));
2291 *mvg_info->primitive_info=primitive_info;
2292 *mvg_info->extent=extent;
2293 mvg_info->offset=0;
2294 ThrowMagickException(mvg_info->exception,GetMagickModule(),
2295 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
2296 return(MagickFalse);
2297 }
2298 primitive_info[extent].primitive=UndefinedPrimitive;
2299 primitive_info[extent].text=(char *) NULL;
2300 /*
2301 Commit updated buffer.
2302 */
2303 for (i=(ssize_t) *mvg_info->extent; i < (ssize_t) extent; i++)
2304 {
2305 primitive_info[i].primitive=UndefinedPrimitive;
2306 primitive_info[i].text=(char *) NULL;
2307 }
2308 *mvg_info->primitive_info=primitive_info;
2309 *mvg_info->extent=extent;
2310 return(MagickTrue);
2311}
2312
2313static inline double GetDrawValue(const char *magick_restrict string,
2314 char **magick_restrict sentinel)
2315{
2316 char
2317 **magick_restrict q;
2318
2319 double
2320 value;
2321
2322 q=sentinel;
2323 value=InterpretLocaleValue(string,q);
2324 sentinel=q;
2325 return(value);
2326}
2327
2328static int MVGMacroCompare(const void *target,const void *source)
2329{
2330 const char
2331 *p,
2332 *q;
2333
2334 p=(const char *) target;
2335 q=(const char *) source;
2336 return(strcmp(p,q));
2337}
2338
2339static SplayTreeInfo *GetMVGMacros(const char *primitive,
2340 ExceptionInfo *exception)
2341{
2342 char
2343 *macro,
2344 *token;
2345
2346 const char
2347 *q;
2348
2349 size_t
2350 extent;
2351
2352 SplayTreeInfo
2353 *macros;
2354
2355 /*
2356 Scan graphic primitives for definitions and classes.
2357 */
2358 if (primitive == (const char *) NULL)
2359 return((SplayTreeInfo *) NULL);
2360 macros=NewSplayTree(MVGMacroCompare,RelinquishMagickMemory,
2361 RelinquishMagickMemory);
2362 macro=AcquireString(primitive);
2363 token=AcquireString(primitive);
2364 extent=strlen(token)+MagickPathExtent;
2365 for (q=primitive; *q != '\0'; )
2366 {
2367 if (GetNextToken(q,&q,extent,token) < 1)
2368 break;
2369 if (*token == '\0')
2370 break;
2371 if (LocaleCompare("push",token) == 0)
2372 {
2373 const char
2374 *end,
2375 *start;
2376
2377 (void) GetNextToken(q,&q,extent,token);
2378 if (*q == '"')
2379 {
2380 char
2381 name[MagickPathExtent];
2382
2383 const char
2384 *p;
2385
2386 ssize_t
2387 n;
2388
2389 /*
2390 Named macro (e.g. push graphic-context "wheel").
2391 */
2392 (void) GetNextToken(q,&q,extent,token);
2393 start=q;
2394 end=q;
2395 (void) CopyMagickString(name,token,MagickPathExtent);
2396 n=1;
2397 for (p=q; *p != '\0'; )
2398 {
2399 if (GetNextToken(p,&p,extent,token) < 1)
2400 break;
2401 if (*token == '\0')
2402 break;
2403 if (LocaleCompare(token,"pop") == 0)
2404 {
2405 end=p-strlen(token)-1;
2406 n--;
2407 }
2408 if (LocaleCompare(token,"push") == 0)
2409 {
2410 if (n++ > MagickMaxRecursionDepth)
2411 {
2412 (void) ThrowMagickException(exception,GetMagickModule(),
2413 DrawError,"VectorGraphicsNestedTooDeeply","`%s'",token);
2414 break;
2415 }
2416 }
2417 if ((n == 0) && (end >= start))
2418 {
2419 size_t
2420 length=(size_t) (end-start);
2421
2422 /*
2423 Extract macro.
2424 */
2425 (void) GetNextToken(p,&p,extent,token);
2426 if (length > 0)
2427 {
2428 (void) CopyMagickString(macro,start,length);
2429 (void) AddValueToSplayTree(macros,ConstantString(name),
2430 ConstantString(macro));
2431 }
2432 break;
2433 }
2434 }
2435 }
2436 }
2437 }
2438 token=DestroyString(token);
2439 macro=DestroyString(macro);
2440 return(macros);
2441}
2442
2443static inline MagickBooleanType IsValidListChar(int c)
2444{
2445 if ((c >= '0') && (c <= '9'))
2446 return(MagickTrue);
2447 switch (c)
2448 {
2449 case '.':
2450 case '+':
2451 case '-':
2452 case ',':
2453 case ' ':
2454 case '\t':
2455 case '\r':
2456 case '\n':
2457 break;
2458 default:
2459 return(MagickFalse);
2460 }
2461 return(MagickTrue);
2462}
2463
2464static inline MagickBooleanType IsValidPoint(const char *point)
2465{
2466 char
2467 *p;
2468
2469 double
2470 value;
2471
2472 value=GetDrawValue(point,&p);
2473 return((fabs(value) < MagickEpsilon) && (p == point) ? MagickFalse :
2474 MagickTrue);
2475}
2476
2477static inline MagickBooleanType TracePoint(PrimitiveInfo *primitive_info,
2478 const PointInfo point)
2479{
2480 primitive_info->point=point;
2481 primitive_info->coordinates=1;
2482 primitive_info->closed_subpath=MagickFalse;
2483 primitive_info->text=(char *) NULL;
2484 return(MagickTrue);
2485}
2486
2487static MagickBooleanType RenderMVGContent(Image *image,
2488 const DrawInfo *draw_info,const size_t depth)
2489{
2490#define RenderImageTag "Render/Image"
2491
2492 AffineMatrix
2493 affine,
2494 current;
2495
2496 char
2497 key[2*MaxTextExtent],
2498 keyword[MaxTextExtent],
2499 geometry[MaxTextExtent],
2500 name[MaxTextExtent],
2501 *next_token,
2502 pattern[MaxTextExtent],
2503 *primitive,
2504 *token;
2505
2506 const char
2507 *p,
2508 *q;
2509
2510 double
2511 angle,
2512 coordinates,
2513 cursor,
2514 factor,
2515 primitive_extent;
2516
2517 DrawInfo
2518 *clone_info,
2519 **graphic_context;
2520
2521 MagickBooleanType
2522 proceed;
2523
2524 MagickStatusType
2525 status;
2526
2527 MVGInfo
2528 mvg_info;
2529
2530 PointInfo
2531 point;
2532
2533 PixelPacket
2534 start_color;
2535
2536 PrimitiveInfo
2537 *primitive_info;
2538
2539 PrimitiveType
2540 primitive_type;
2541
2542 SegmentInfo
2543 bounds;
2544
2545 size_t
2546 extent,
2547 number_points;
2548
2549 SplayTreeInfo
2550 *macros;
2551
2552 ssize_t
2553 classDepth = 0,
2554 defsDepth,
2555 i,
2556 j,
2557 k,
2558 n,
2559 symbolDepth,
2560 x;
2561
2562 TypeMetric
2563 metrics;
2564
2565 assert(image != (Image *) NULL);
2566 assert(image->signature == MagickCoreSignature);
2567 assert(draw_info != (DrawInfo *) NULL);
2568 assert(draw_info->signature == MagickCoreSignature);
2569 if (IsEventLogging() != MagickFalse)
2570 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2571 if (depth > MagickMaxRecursionDepth)
2572 ThrowBinaryImageException(DrawError,"VectorGraphicsNestedTooDeeply",
2573 image->filename);
2574 if ((draw_info->primitive == (char *) NULL) ||
2575 (*draw_info->primitive == '\0'))
2576 return(MagickFalse);
2577 if (draw_info->debug != MagickFalse)
2578 (void) LogMagickEvent(DrawEvent,GetMagickModule(),"begin draw-image");
2579 if (SetImageStorageClass(image,DirectClass) == MagickFalse)
2580 return(MagickFalse);
2581 if (image->matte == MagickFalse)
2582 {
2583 status=SetImageAlphaChannel(image,OpaqueAlphaChannel);
2584 if (status == MagickFalse)
2585 return(MagickFalse);
2586 }
2587 primitive=(char *) NULL;
2588 if ((*draw_info->primitive == '@') && (strlen(draw_info->primitive) > 1) &&
2589 (*(draw_info->primitive+1) != '-') && (depth == 0))
2590 primitive=FileToString(draw_info->primitive,~0UL,&image->exception);
2591 else
2592 primitive=AcquireString(draw_info->primitive);
2593 if (primitive == (char *) NULL)
2594 return(MagickFalse);
2595 primitive_extent=(double) strlen(primitive);
2596 (void) SetImageArtifact(image,"mvg:vector-graphics",primitive);
2597 n=0;
2598 /*
2599 Allocate primitive info memory.
2600 */
2601 graphic_context=(DrawInfo **) AcquireMagickMemory(sizeof(*graphic_context));
2602 if (graphic_context == (DrawInfo **) NULL)
2603 {
2604 primitive=DestroyString(primitive);
2605 ThrowBinaryImageException(ResourceLimitError,"MemoryAllocationFailed",
2606 image->filename);
2607 }
2608 number_points=(size_t) PrimitiveExtentPad;
2609 primitive_info=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
2610 (number_points+1),sizeof(*primitive_info));
2611 if (primitive_info == (PrimitiveInfo *) NULL)
2612 {
2613 primitive=DestroyString(primitive);
2614 for ( ; n >= 0; n--)
2615 graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
2616 graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
2617 ThrowBinaryImageException(ResourceLimitError,"MemoryAllocationFailed",
2618 image->filename);
2619 }
2620 (void) memset(primitive_info,0,(size_t) (number_points+1)*
2621 sizeof(*primitive_info));
2622 (void) memset(&mvg_info,0,sizeof(mvg_info));
2623 mvg_info.primitive_info=(&primitive_info);
2624 mvg_info.extent=(&number_points);
2625 mvg_info.exception=(&image->exception);
2626 graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,draw_info);
2627 graphic_context[n]->viewbox=image->page;
2628 if ((image->page.width == 0) || (image->page.height == 0))
2629 {
2630 graphic_context[n]->viewbox.width=image->columns;
2631 graphic_context[n]->viewbox.height=image->rows;
2632 }
2633 token=AcquireString(primitive);
2634 extent=strlen(token)+MaxTextExtent;
2635 cursor=0.0;
2636 defsDepth=0;
2637 symbolDepth=0;
2638 macros=GetMVGMacros(primitive,&image->exception);
2639 status=QueryColorDatabase("#000000",&start_color,&image->exception);
2640 for (q=primitive; *q != '\0'; )
2641 {
2642 /*
2643 Interpret graphic primitive.
2644 */
2645 if (GetNextToken(q,&q,MaxTextExtent,keyword) < 1)
2646 break;
2647 if (*keyword == '\0')
2648 break;
2649 if (*keyword == '#')
2650 {
2651 /*
2652 Comment.
2653 */
2654 while ((*q != '\n') && (*q != '\0'))
2655 q++;
2656 continue;
2657 }
2658 p=q-strlen(keyword)-1;
2659 primitive_type=UndefinedPrimitive;
2660 current=graphic_context[n]->affine;
2661 GetAffineMatrix(&affine);
2662 *token='\0';
2663 switch (*keyword)
2664 {
2665 case ';':
2666 break;
2667 case 'a':
2668 case 'A':
2669 {
2670 if (LocaleCompare("affine",keyword) == 0)
2671 {
2672 (void) GetNextToken(q,&q,extent,token);
2673 affine.sx=GetDrawValue(token,&next_token);
2674 if (token == next_token)
2675 ThrowPointExpectedException(image,token);
2676 (void) GetNextToken(q,&q,extent,token);
2677 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
2678 ThrowPointExpectedException(image,token);
2679 if (*token == ',')
2680 (void) GetNextToken(q,&q,extent,token);
2681 affine.ry=GetDrawValue(token,&next_token);
2682 if (token == next_token)
2683 ThrowPointExpectedException(image,token);
2684 (void) GetNextToken(q,&q,extent,token);
2685 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
2686 ThrowPointExpectedException(image,token);
2687 if (*token == ',')
2688 (void) GetNextToken(q,&q,extent,token);
2689 affine.rx=GetDrawValue(token,&next_token);
2690 if (token == next_token)
2691 ThrowPointExpectedException(image,token);
2692 (void) GetNextToken(q,&q,extent,token);
2693 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
2694 ThrowPointExpectedException(image,token);
2695 if (*token == ',')
2696 (void) GetNextToken(q,&q,extent,token);
2697 affine.sy=GetDrawValue(token,&next_token);
2698 if (token == next_token)
2699 ThrowPointExpectedException(image,token);
2700 (void) GetNextToken(q,&q,extent,token);
2701 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
2702 ThrowPointExpectedException(image,token);
2703 if (*token == ',')
2704 (void) GetNextToken(q,&q,extent,token);
2705 affine.tx=GetDrawValue(token,&next_token);
2706 if (token == next_token)
2707 ThrowPointExpectedException(image,token);
2708 (void) GetNextToken(q,&q,extent,token);
2709 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
2710 ThrowPointExpectedException(image,token);
2711 if (*token == ',')
2712 (void) GetNextToken(q,&q,extent,token);
2713 affine.ty=GetDrawValue(token,&next_token);
2714 if (token == next_token)
2715 ThrowPointExpectedException(image,token);
2716 break;
2717 }
2718 if (LocaleCompare("arc",keyword) == 0)
2719 {
2720 primitive_type=ArcPrimitive;
2721 break;
2722 }
2723 status=MagickFalse;
2724 break;
2725 }
2726 case 'b':
2727 case 'B':
2728 {
2729 if (LocaleCompare("bezier",keyword) == 0)
2730 {
2731 primitive_type=BezierPrimitive;
2732 break;
2733 }
2734 if (LocaleCompare("border-color",keyword) == 0)
2735 {
2736 (void) GetNextToken(q,&q,extent,token);
2737 status&=QueryColorDatabase(token,&graphic_context[n]->border_color,
2738 &image->exception);
2739 break;
2740 }
2741 status=MagickFalse;
2742 break;
2743 }
2744 case 'c':
2745 case 'C':
2746 {
2747 if (LocaleCompare("class",keyword) == 0)
2748 {
2749 const char
2750 *mvg_class;
2751
2752 (void) GetNextToken(q,&q,extent,token);
2753 if ((*token == '\0') || (*token == ';'))
2754 {
2755 status=MagickFalse;
2756 break;
2757 }
2758 /*
2759 Identify recursion.
2760 */
2761 for (i=0; i <= n; i++)
2762 if (LocaleCompare(token,graphic_context[i]->id) == 0)
2763 break;
2764 if (i <= n)
2765 break;
2766 if (classDepth++ > MagickMaxRecursionDepth)
2767 {
2768 (void) ThrowMagickException(&image->exception,GetMagickModule(),
2769 DrawError,"VectorGraphicsNestedTooDeeply","`%s'",token);
2770 status=MagickFalse;
2771 break;
2772 }
2773 mvg_class=(const char *) GetValueFromSplayTree(macros,token);
2774 if ((graphic_context[n]->render != MagickFalse) &&
2775 (mvg_class != (const char *) NULL) && (p > primitive))
2776 {
2777 char
2778 *elements;
2779
2780 ssize_t
2781 offset;
2782
2783 /*
2784 Inject class elements in stream.
2785 */
2786 (void) CloneString(&graphic_context[n]->id,token);
2787 offset=(ssize_t) (p-primitive);
2788 elements=AcquireString(primitive);
2789 elements[offset]='\0';
2790 (void) ConcatenateString(&elements,mvg_class);
2791 (void) ConcatenateString(&elements,"\n");
2792 (void) ConcatenateString(&elements,q);
2793 primitive=DestroyString(primitive);
2794 primitive=elements;
2795 q=primitive+offset;
2796 }
2797 break;
2798 }
2799 if (LocaleCompare("clip-path",keyword) == 0)
2800 {
2801 const char
2802 *clip_path;
2803
2804 /*
2805 Take a node from within the MVG document, and duplicate it here.
2806 */
2807 (void) GetNextToken(q,&q,extent,token);
2808 if (*token == '\0')
2809 {
2810 status=MagickFalse;
2811 break;
2812 }
2813 (void) CloneString(&graphic_context[n]->clip_mask,token);
2814 clip_path=(const char *) GetValueFromSplayTree(macros,token);
2815 if (clip_path != (const char *) NULL)
2816 {
2817 if (graphic_context[n]->clipping_mask != (Image *) NULL)
2818 graphic_context[n]->clipping_mask=
2819 DestroyImage(graphic_context[n]->clipping_mask);
2820 graphic_context[n]->clipping_mask=DrawClippingMask(image,
2821 graphic_context[n],token,clip_path,&image->exception);
2822 if (graphic_context[n]->compliance != SVGCompliance)
2823 {
2824 const char
2825 *clip_path;
2826
2827 clip_path=(const char *) GetValueFromSplayTree(macros,
2828 graphic_context[n]->clip_mask);
2829 if (clip_path != (const char *) NULL)
2830 (void) SetImageArtifact(image,
2831 graphic_context[n]->clip_mask,clip_path);
2832 status&=DrawClipPath(image,graphic_context[n],
2833 graphic_context[n]->clip_mask);
2834 }
2835 }
2836 break;
2837 }
2838 if (LocaleCompare("clip-rule",keyword) == 0)
2839 {
2840 ssize_t
2841 fill_rule;
2842
2843 (void) GetNextToken(q,&q,extent,token);
2844 fill_rule=ParseCommandOption(MagickFillRuleOptions,MagickFalse,
2845 token);
2846 if (fill_rule == -1)
2847 {
2848 status=MagickFalse;
2849 break;
2850 }
2851 graphic_context[n]->fill_rule=(FillRule) fill_rule;
2852 break;
2853 }
2854 if (LocaleCompare("clip-units",keyword) == 0)
2855 {
2856 ssize_t
2857 clip_units;
2858
2859 (void) GetNextToken(q,&q,extent,token);
2860 clip_units=ParseCommandOption(MagickClipPathOptions,MagickFalse,
2861 token);
2862 if (clip_units == -1)
2863 {
2864 status=MagickFalse;
2865 break;
2866 }
2867 graphic_context[n]->clip_units=(ClipPathUnits) clip_units;
2868 if (clip_units == ObjectBoundingBox)
2869 {
2870 GetAffineMatrix(&current);
2871 affine.sx=draw_info->bounds.x2;
2872 affine.sy=draw_info->bounds.y2;
2873 affine.tx=draw_info->bounds.x1;
2874 affine.ty=draw_info->bounds.y1;
2875 break;
2876 }
2877 break;
2878 }
2879 if (LocaleCompare("circle",keyword) == 0)
2880 {
2881 primitive_type=CirclePrimitive;
2882 break;
2883 }
2884 if (LocaleCompare("color",keyword) == 0)
2885 {
2886 primitive_type=ColorPrimitive;
2887 break;
2888 }
2889 if (LocaleCompare("compliance",keyword) == 0)
2890 {
2891 /*
2892 MVG compliance associates a clipping mask with an image; SVG
2893 compliance associates a clipping mask with a graphics context.
2894 */
2895 (void) GetNextToken(q,&q,extent,token);
2896 graphic_context[n]->compliance=(ComplianceType) ParseCommandOption(
2897 MagickComplianceOptions,MagickFalse,token);
2898 break;
2899 }
2900 if (LocaleCompare("currentColor",keyword) == 0)
2901 {
2902 (void) GetNextToken(q,&q,extent,token);
2903 break;
2904 }
2905 status=MagickFalse;
2906 break;
2907 }
2908 case 'd':
2909 case 'D':
2910 {
2911 if (LocaleCompare("decorate",keyword) == 0)
2912 {
2913 ssize_t
2914 decorate;
2915
2916 (void) GetNextToken(q,&q,extent,token);
2917 decorate=ParseCommandOption(MagickDecorateOptions,MagickFalse,
2918 token);
2919 if (decorate == -1)
2920 {
2921 status=MagickFalse;
2922 break;
2923 }
2924 graphic_context[n]->decorate=(DecorationType) decorate;
2925 break;
2926 }
2927 if (LocaleCompare("density",keyword) == 0)
2928 {
2929 (void) GetNextToken(q,&q,extent,token);
2930 (void) CloneString(&graphic_context[n]->density,token);
2931 break;
2932 }
2933 if (LocaleCompare("direction",keyword) == 0)
2934 {
2935 ssize_t
2936 direction;
2937
2938 (void) GetNextToken(q,&q,extent,token);
2939 direction=ParseCommandOption(MagickDirectionOptions,MagickFalse,
2940 token);
2941 if (direction == -1)
2942 status=MagickFalse;
2943 else
2944 graphic_context[n]->direction=(DirectionType) direction;
2945 break;
2946 }
2947 status=MagickFalse;
2948 break;
2949 }
2950 case 'e':
2951 case 'E':
2952 {
2953 if (LocaleCompare("ellipse",keyword) == 0)
2954 {
2955 primitive_type=EllipsePrimitive;
2956 break;
2957 }
2958 if (LocaleCompare("encoding",keyword) == 0)
2959 {
2960 (void) GetNextToken(q,&q,extent,token);
2961 (void) CloneString(&graphic_context[n]->encoding,token);
2962 break;
2963 }
2964 status=MagickFalse;
2965 break;
2966 }
2967 case 'f':
2968 case 'F':
2969 {
2970 if (LocaleCompare("fill",keyword) == 0)
2971 {
2972 const char
2973 *mvg_class;
2974
2975 (void) GetNextToken(q,&q,extent,token);
2976 if (graphic_context[n]->clip_path != MagickFalse)
2977 break;
2978 mvg_class=(const char *) GetValueFromSplayTree(macros,token);
2979 if (mvg_class != (const char *) NULL)
2980 {
2981 (void) DrawPatternPath(image,draw_info,mvg_class,
2982 &graphic_context[n]->fill_pattern);
2983 break;
2984 }
2985 (void) FormatLocaleString(pattern,MaxTextExtent,"%s",token);
2986 if (GetImageArtifact(image,pattern) != (const char *) NULL)
2987 {
2988 (void) DrawPatternPath(image,draw_info,token,
2989 &graphic_context[n]->fill_pattern);
2990 break;
2991 }
2992 status&=QueryColorDatabase(token,&graphic_context[n]->fill,
2993 &image->exception);
2994 if (graphic_context[n]->fill_opacity != (double) OpaqueOpacity)
2995 graphic_context[n]->fill.opacity=ClampToQuantum(
2996 graphic_context[n]->fill_opacity);
2997 break;
2998 }
2999 if (LocaleCompare("fill-opacity",keyword) == 0)
3000 {
3001 double
3002 opacity;
3003
3004 (void) GetNextToken(q,&q,extent,token);
3005 if (graphic_context[n]->clip_path != MagickFalse)
3006 break;
3007 factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
3008 opacity=MagickMin(MagickMax(factor*
3009 GetDrawValue(token,&next_token),0.0),1.0);
3010 if (token == next_token)
3011 ThrowPointExpectedException(image,token);
3012 if (graphic_context[n]->compliance == SVGCompliance)
3013 graphic_context[n]->fill_opacity*=(1.0-opacity);
3014 else
3015 graphic_context[n]->fill_opacity=((MagickRealType) QuantumRange-
3016 graphic_context[n]->fill_opacity)*(1.0-opacity);
3017 if (graphic_context[n]->fill.opacity != TransparentOpacity)
3018 graphic_context[n]->fill.opacity=(Quantum)
3019 graphic_context[n]->fill_opacity;
3020 else
3021 graphic_context[n]->fill.opacity=ClampToQuantum((MagickRealType)
3022 QuantumRange*(1.0-opacity));
3023 break;
3024 }
3025 if (LocaleCompare("fill-rule",keyword) == 0)
3026 {
3027 ssize_t
3028 fill_rule;
3029
3030 (void) GetNextToken(q,&q,extent,token);
3031 fill_rule=ParseCommandOption(MagickFillRuleOptions,MagickFalse,
3032 token);
3033 if (fill_rule == -1)
3034 {
3035 status=MagickFalse;
3036 break;
3037 }
3038 graphic_context[n]->fill_rule=(FillRule) fill_rule;
3039 break;
3040 }
3041 if (LocaleCompare("font",keyword) == 0)
3042 {
3043 (void) GetNextToken(q,&q,extent,token);
3044 (void) CloneString(&graphic_context[n]->font,token);
3045 if (LocaleCompare("none",token) == 0)
3046 graphic_context[n]->font=(char *) RelinquishMagickMemory(
3047 graphic_context[n]->font);
3048 break;
3049 }
3050 if (LocaleCompare("font-family",keyword) == 0)
3051 {
3052 (void) GetNextToken(q,&q,extent,token);
3053 (void) CloneString(&graphic_context[n]->family,token);
3054 break;
3055 }
3056 if (LocaleCompare("font-size",keyword) == 0)
3057 {
3058 (void) GetNextToken(q,&q,extent,token);
3059 graphic_context[n]->pointsize=GetDrawValue(token,&next_token);
3060 if (token == next_token)
3061 ThrowPointExpectedException(image,token);
3062 break;
3063 }
3064 if (LocaleCompare("font-stretch",keyword) == 0)
3065 {
3066 ssize_t
3067 stretch;
3068
3069 (void) GetNextToken(q,&q,extent,token);
3070 stretch=ParseCommandOption(MagickStretchOptions,MagickFalse,token);
3071 if (stretch == -1)
3072 {
3073 status=MagickFalse;
3074 break;
3075 }
3076 graphic_context[n]->stretch=(StretchType) stretch;
3077 break;
3078 }
3079 if (LocaleCompare("font-style",keyword) == 0)
3080 {
3081 ssize_t
3082 style;
3083
3084 (void) GetNextToken(q,&q,extent,token);
3085 style=ParseCommandOption(MagickStyleOptions,MagickFalse,token);
3086 if (style == -1)
3087 {
3088 status=MagickFalse;
3089 break;
3090 }
3091 graphic_context[n]->style=(StyleType) style;
3092 break;
3093 }
3094 if (LocaleCompare("font-weight",keyword) == 0)
3095 {
3096 ssize_t
3097 weight;
3098
3099 (void) GetNextToken(q,&q,extent,token);
3100 weight=ParseCommandOption(MagickWeightOptions,MagickFalse,token);
3101 if (weight == -1)
3102 weight=(ssize_t) StringToUnsignedLong(token);
3103 graphic_context[n]->weight=(size_t) weight;
3104 break;
3105 }
3106 status=MagickFalse;
3107 break;
3108 }
3109 case 'g':
3110 case 'G':
3111 {
3112 if (LocaleCompare("gradient-units",keyword) == 0)
3113 {
3114 (void) GetNextToken(q,&q,extent,token);
3115 break;
3116 }
3117 if (LocaleCompare("gravity",keyword) == 0)
3118 {
3119 ssize_t
3120 gravity;
3121
3122 (void) GetNextToken(q,&q,extent,token);
3123 gravity=ParseCommandOption(MagickGravityOptions,MagickFalse,token);
3124 if (gravity == -1)
3125 {
3126 status=MagickFalse;
3127 break;
3128 }
3129 graphic_context[n]->gravity=(GravityType) gravity;
3130 break;
3131 }
3132 status=MagickFalse;
3133 break;
3134 }
3135 case 'i':
3136 case 'I':
3137 {
3138 if (LocaleCompare("image",keyword) == 0)
3139 {
3140 ssize_t
3141 compose;
3142
3143 primitive_type=ImagePrimitive;
3144 (void) GetNextToken(q,&q,extent,token);
3145 compose=ParseCommandOption(MagickComposeOptions,MagickFalse,token);
3146 if (compose == -1)
3147 {
3148 status=MagickFalse;
3149 break;
3150 }
3151 graphic_context[n]->compose=(CompositeOperator) compose;
3152 break;
3153 }
3154 if (LocaleCompare("interline-spacing",keyword) == 0)
3155 {
3156 (void) GetNextToken(q,&q,extent,token);
3157 graphic_context[n]->interline_spacing=GetDrawValue(token,
3158 &next_token);
3159 if (token == next_token)
3160 ThrowPointExpectedException(image,token);
3161 break;
3162 }
3163 if (LocaleCompare("interword-spacing",keyword) == 0)
3164 {
3165 (void) GetNextToken(q,&q,extent,token);
3166 graphic_context[n]->interword_spacing=GetDrawValue(token,
3167 &next_token);
3168 if (token == next_token)
3169 ThrowPointExpectedException(image,token);
3170 break;
3171 }
3172 status=MagickFalse;
3173 break;
3174 }
3175 case 'k':
3176 case 'K':
3177 {
3178 if (LocaleCompare("kerning",keyword) == 0)
3179 {
3180 (void) GetNextToken(q,&q,extent,token);
3181 graphic_context[n]->kerning=GetDrawValue(token,&next_token);
3182 if (token == next_token)
3183 ThrowPointExpectedException(image,token);
3184 break;
3185 }
3186 status=MagickFalse;
3187 break;
3188 }
3189 case 'l':
3190 case 'L':
3191 {
3192 if (LocaleCompare("letter-spacing",keyword) == 0)
3193 {
3194 (void) GetNextToken(q,&q,extent,token);
3195 if (IsValidPoint(token) == MagickFalse)
3196 break;
3197 clone_info=CloneDrawInfo((ImageInfo *) NULL,graphic_context[n]);
3198 clone_info->text=AcquireString(" ");
3199 status&=GetTypeMetrics(image,clone_info,&metrics);
3200 graphic_context[n]->kerning=metrics.width*
3201 GetDrawValue(token,&next_token);
3202 clone_info=DestroyDrawInfo(clone_info);
3203 if (token == next_token)
3204 ThrowPointExpectedException(image,token);
3205 break;
3206 }
3207 if (LocaleCompare("line",keyword) == 0)
3208 {
3209 primitive_type=LinePrimitive;
3210 break;
3211 }
3212 status=MagickFalse;
3213 break;
3214 }
3215 case 'm':
3216 case 'M':
3217 {
3218 if (LocaleCompare("mask",keyword) == 0)
3219 {
3220 const char
3221 *mask_path;
3222
3223 /*
3224 Take a node from within the MVG document, and duplicate it here.
3225 */
3226 (void) GetNextToken(q,&q,extent,token);
3227 mask_path=(const char *) GetValueFromSplayTree(macros,token);
3228 if (mask_path != (const char *) NULL)
3229 {
3230 if (graphic_context[n]->composite_mask != (Image *) NULL)
3231 graphic_context[n]->composite_mask=
3232 DestroyImage(graphic_context[n]->composite_mask);
3233 graphic_context[n]->composite_mask=DrawCompositeMask(image,
3234 graphic_context[n],token,mask_path,&image->exception);
3235 if (graphic_context[n]->compliance != SVGCompliance)
3236 status=SetImageMask(image,graphic_context[n]->composite_mask);
3237 }
3238 break;
3239 }
3240 if (LocaleCompare("matte",keyword) == 0)
3241 {
3242 primitive_type=MattePrimitive;
3243 break;
3244 }
3245 status=MagickFalse;
3246 break;
3247 }
3248 case 'o':
3249 case 'O':
3250 {
3251 if (LocaleCompare("offset",keyword) == 0)
3252 {
3253 (void) GetNextToken(q,&q,extent,token);
3254 break;
3255 }
3256 if (LocaleCompare("opacity",keyword) == 0)
3257 {
3258 double
3259 opacity;
3260
3261 (void) GetNextToken(q,&q,extent,token);
3262 if (graphic_context[n]->clip_path != MagickFalse)
3263 break;
3264 factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
3265 opacity=1.0-MagickMin(MagickMax(factor*
3266 GetDrawValue(token,&next_token),0.0),1.0);
3267 if (token == next_token)
3268 ThrowPointExpectedException(image,token);
3269 if (graphic_context[n]->compliance == SVGCompliance)
3270 {
3271 graphic_context[n]->fill_opacity*=opacity;
3272 graphic_context[n]->stroke_opacity*=opacity;
3273 }
3274 else
3275 {
3276 graphic_context[n]->fill_opacity=(double) QuantumRange*opacity;
3277 graphic_context[n]->stroke_opacity=(double) QuantumRange*
3278 opacity;
3279 }
3280 if (graphic_context[n]->fill.opacity != (double) TransparentOpacity)
3281 {
3282 graphic_context[n]->fill.opacity=
3283 graphic_context[n]->fill_opacity;
3284 graphic_context[n]->stroke.opacity=
3285 graphic_context[n]->stroke_opacity;
3286 }
3287 else
3288 {
3289 graphic_context[n]->fill.opacity=(MagickRealType)
3290 ClampToQuantum((double) QuantumRange*opacity);
3291 graphic_context[n]->stroke.opacity=(MagickRealType)
3292 ClampToQuantum((double) QuantumRange*opacity);
3293 }
3294 break;
3295 }
3296 status=MagickFalse;
3297 break;
3298 }
3299 case 'p':
3300 case 'P':
3301 {
3302 if (LocaleCompare("path",keyword) == 0)
3303 {
3304 primitive_type=PathPrimitive;
3305 break;
3306 }
3307 if (LocaleCompare("point",keyword) == 0)
3308 {
3309 primitive_type=PointPrimitive;
3310 break;
3311 }
3312 if (LocaleCompare("polyline",keyword) == 0)
3313 {
3314 primitive_type=PolylinePrimitive;
3315 break;
3316 }
3317 if (LocaleCompare("polygon",keyword) == 0)
3318 {
3319 primitive_type=PolygonPrimitive;
3320 break;
3321 }
3322 if (LocaleCompare("pop",keyword) == 0)
3323 {
3324 if (GetNextToken(q,&q,extent,token) < 1)
3325 break;
3326 if (LocaleCompare("class",token) == 0)
3327 break;
3328 if (LocaleCompare("clip-path",token) == 0)
3329 break;
3330 if (LocaleCompare("defs",token) == 0)
3331 {
3332 defsDepth--;
3333 graphic_context[n]->render=defsDepth > 0 ? MagickFalse :
3334 MagickTrue;
3335 break;
3336 }
3337 if (LocaleCompare("gradient",token) == 0)
3338 break;
3339 if (LocaleCompare("graphic-context",token) == 0)
3340 {
3341 if (n <= 0)
3342 {
3343 (void) ThrowMagickException(&image->exception,
3344 GetMagickModule(),DrawError,
3345 "UnbalancedGraphicContextPushPop","`%s'",token);
3346 status=MagickFalse;
3347 n=0;
3348 break;
3349 }
3350 if ((graphic_context[n]->clip_mask != (char *) NULL) &&
3351 (graphic_context[n]->compliance != SVGCompliance))
3352 if (LocaleCompare(graphic_context[n]->clip_mask,
3353 graphic_context[n-1]->clip_mask) != 0)
3354 status=SetImageClipMask(image,(Image *) NULL);
3355 graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
3356 n--;
3357 break;
3358 }
3359 if (LocaleCompare("mask",token) == 0)
3360 break;
3361 if (LocaleCompare("pattern",token) == 0)
3362 break;
3363 if (LocaleCompare("symbol",token) == 0)
3364 {
3365 symbolDepth--;
3366 graphic_context[n]->render=symbolDepth > 0 ? MagickFalse :
3367 MagickTrue;
3368 break;
3369 }
3370 status=MagickFalse;
3371 break;
3372 }
3373 if (LocaleCompare("push",keyword) == 0)
3374 {
3375 if (GetNextToken(q,&q,extent,token) < 1)
3376 break;
3377 if (LocaleCompare("class",token) == 0)
3378 {
3379 /*
3380 Class context.
3381 */
3382 for (p=q; *q != '\0'; )
3383 {
3384 if (GetNextToken(q,&q,extent,token) < 1)
3385 break;
3386 if (LocaleCompare(token,"pop") != 0)
3387 continue;
3388 (void) GetNextToken(q,(const char **) NULL,extent,token);
3389 if (LocaleCompare(token,"class") != 0)
3390 continue;
3391 break;
3392 }
3393 (void) GetNextToken(q,&q,extent,token);
3394 break;
3395 }
3396 if (LocaleCompare("clip-path",token) == 0)
3397 {
3398 (void) GetNextToken(q,&q,extent,token);
3399 for (p=q; *q != '\0'; )
3400 {
3401 if (GetNextToken(q,&q,extent,token) < 1)
3402 break;
3403 if (LocaleCompare(token,"pop") != 0)
3404 continue;
3405 (void) GetNextToken(q,(const char **) NULL,extent,token);
3406 if (LocaleCompare(token,"clip-path") != 0)
3407 continue;
3408 break;
3409 }
3410 if ((q == (char *) NULL) || (p == (char *) NULL) || ((q-4) < p))
3411 {
3412 status=MagickFalse;
3413 break;
3414 }
3415 (void) GetNextToken(q,&q,extent,token);
3416 break;
3417 }
3418 if (LocaleCompare("defs",token) == 0)
3419 {
3420 defsDepth++;
3421 graphic_context[n]->render=defsDepth > 0 ? MagickFalse :
3422 MagickTrue;
3423 break;
3424 }
3425 if (LocaleCompare("gradient",token) == 0)
3426 {
3427 char
3428 key[2*MaxTextExtent],
3429 name[MaxTextExtent],
3430 type[MaxTextExtent];
3431
3432 SegmentInfo
3433 segment;
3434
3435 (void) GetNextToken(q,&q,extent,token);
3436 (void) CopyMagickString(name,token,MaxTextExtent);
3437 (void) GetNextToken(q,&q,extent,token);
3438 (void) CopyMagickString(type,token,MaxTextExtent);
3439 (void) GetNextToken(q,&q,extent,token);
3440 segment.x1=GetDrawValue(token,&next_token);
3441 if (token == next_token)
3442 ThrowPointExpectedException(image,token);
3443 (void) GetNextToken(q,&q,extent,token);
3444 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
3445 ThrowPointExpectedException(image,token);
3446 if (*token == ',')
3447 (void) GetNextToken(q,&q,extent,token);
3448 segment.y1=GetDrawValue(token,&next_token);
3449 if (token == next_token)
3450 ThrowPointExpectedException(image,token);
3451 (void) GetNextToken(q,&q,extent,token);
3452 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
3453 ThrowPointExpectedException(image,token);
3454 if (*token == ',')
3455 (void) GetNextToken(q,&q,extent,token);
3456 segment.x2=GetDrawValue(token,&next_token);
3457 if (token == next_token)
3458 ThrowPointExpectedException(image,token);
3459 (void) GetNextToken(q,&q,extent,token);
3460 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
3461 ThrowPointExpectedException(image,token);
3462 if (*token == ',')
3463 (void) GetNextToken(q,&q,extent,token);
3464 segment.y2=GetDrawValue(token,&next_token);
3465 if (token == next_token)
3466 ThrowPointExpectedException(image,token);
3467 if (LocaleCompare(type,"radial") == 0)
3468 {
3469 (void) GetNextToken(q,&q,extent,token);
3470 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
3471 ThrowPointExpectedException(image,token);
3472 if (*token == ',')
3473 (void) GetNextToken(q,&q,extent,token);
3474 }
3475 for (p=q; *q != '\0'; )
3476 {
3477 if (GetNextToken(q,&q,extent,token) < 1)
3478 break;
3479 if (LocaleCompare(token,"pop") != 0)
3480 continue;
3481 (void) GetNextToken(q,(const char **) NULL,extent,token);
3482 if (LocaleCompare(token,"gradient") != 0)
3483 continue;
3484 break;
3485 }
3486 if ((q == (char *) NULL) || (*q == '\0') ||
3487 (p == (char *) NULL) || ((q-4) < p) ||
3488 ((size_t) (q-p+4+1) > extent))
3489 {
3490 status=MagickFalse;
3491 break;
3492 }
3493 (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
3494 bounds.x1=graphic_context[n]->affine.sx*segment.x1+
3495 graphic_context[n]->affine.ry*segment.y1+
3496 graphic_context[n]->affine.tx;
3497 bounds.y1=graphic_context[n]->affine.rx*segment.x1+
3498 graphic_context[n]->affine.sy*segment.y1+
3499 graphic_context[n]->affine.ty;
3500 bounds.x2=graphic_context[n]->affine.sx*segment.x2+
3501 graphic_context[n]->affine.ry*segment.y2+
3502 graphic_context[n]->affine.tx;
3503 bounds.y2=graphic_context[n]->affine.rx*segment.x2+
3504 graphic_context[n]->affine.sy*segment.y2+
3505 graphic_context[n]->affine.ty;
3506 (void) FormatLocaleString(key,MaxTextExtent,"%s",name);
3507 (void) SetImageArtifact(image,key,token);
3508 (void) FormatLocaleString(key,MaxTextExtent,"%s-type",name);
3509 (void) SetImageArtifact(image,key,type);
3510 (void) FormatLocaleString(key,MaxTextExtent,"%s-geometry",name);
3511 (void) FormatLocaleString(geometry,MaxTextExtent,
3512 "%gx%g%+.15g%+.15g",
3513 MagickMax(fabs(bounds.x2-bounds.x1+1.0),1.0),
3514 MagickMax(fabs(bounds.y2-bounds.y1+1.0),1.0),
3515 bounds.x1,bounds.y1);
3516 (void) SetImageArtifact(image,key,geometry);
3517 (void) GetNextToken(q,&q,extent,token);
3518 break;
3519 }
3520 if (LocaleCompare("graphic-context",token) == 0)
3521 {
3522 n++;
3523 graphic_context=(DrawInfo **) ResizeQuantumMemory(
3524 graphic_context,(size_t) (n+1),sizeof(*graphic_context));
3525 if (graphic_context == (DrawInfo **) NULL)
3526 {
3527 (void) ThrowMagickException(&image->exception,
3528 GetMagickModule(),ResourceLimitError,
3529 "MemoryAllocationFailed","`%s'",image->filename);
3530 status=MagickFalse;
3531 break;
3532 }
3533 graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,
3534 graphic_context[n-1]);
3535 if (*q == '"')
3536 {
3537 (void) GetNextToken(q,&q,extent,token);
3538 (void) CloneString(&graphic_context[n]->id,token);
3539 }
3540 if (n > MagickMaxRecursionDepth)
3541 {
3542 (void) ThrowMagickException(&image->exception,
3543 GetMagickModule(),DrawError,
3544 "VectorGraphicsNestedTooDeeply","`%s'",image->filename);
3545 status=MagickFalse;
3546 }
3547 break;
3548 }
3549 if (LocaleCompare("mask",token) == 0)
3550 {
3551 (void) GetNextToken(q,&q,extent,token);
3552 break;
3553 }
3554 if (LocaleCompare("pattern",token) == 0)
3555 {
3556 RectangleInfo
3557 bounds;
3558
3559 (void) GetNextToken(q,&q,extent,token);
3560 (void) CopyMagickString(name,token,MaxTextExtent);
3561 (void) GetNextToken(q,&q,extent,token);
3562 bounds.x=CastDoubleToLong(ceil(GetDrawValue(token,
3563 &next_token)-0.5));
3564 if (token == next_token)
3565 ThrowPointExpectedException(image,token);
3566 (void) GetNextToken(q,&q,extent,token);
3567 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
3568 ThrowPointExpectedException(image,token);
3569 if (*token == ',')
3570 (void) GetNextToken(q,&q,extent,token);
3571 bounds.y=CastDoubleToLong(ceil(GetDrawValue(token,
3572 &next_token)-0.5));
3573 if (token == next_token)
3574 ThrowPointExpectedException(image,token);
3575 (void) GetNextToken(q,&q,extent,token);
3576 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
3577 ThrowPointExpectedException(image,token);
3578 if (*token == ',')
3579 (void) GetNextToken(q,&q,extent,token);
3580 bounds.width=CastDoubleToUnsigned(GetDrawValue(token,
3581 &next_token)+0.5);
3582 if (token == next_token)
3583 ThrowPointExpectedException(image,token);
3584 (void) GetNextToken(q,&q,extent,token);
3585 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
3586 ThrowPointExpectedException(image,token);
3587 if (*token == ',')
3588 (void) GetNextToken(q,&q,extent,token);
3589 bounds.height=CastDoubleToUnsigned(GetDrawValue(token,
3590 &next_token)+0.5);
3591 if (token == next_token)
3592 ThrowPointExpectedException(image,token);
3593 for (p=q; *q != '\0'; )
3594 {
3595 if (GetNextToken(q,&q,extent,token) < 1)
3596 break;
3597 if (LocaleCompare(token,"pop") != 0)
3598 continue;
3599 (void) GetNextToken(q,(const char **) NULL,extent,token);
3600 if (LocaleCompare(token,"pattern") != 0)
3601 continue;
3602 break;
3603 }
3604 if ((q == (char *) NULL) || (p == (char *) NULL) ||
3605 ((q-4) < p) || ((size_t) (q-p+4+1) > extent))
3606 {
3607 status=MagickFalse;
3608 break;
3609 }
3610 (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
3611 (void) FormatLocaleString(key,MaxTextExtent,"%s",name);
3612 (void) SetImageArtifact(image,key,token);
3613 (void) FormatLocaleString(key,MaxTextExtent,"%s-geometry",name);
3614 (void) FormatLocaleString(geometry,MaxTextExtent,
3615 "%.20gx%.20g%+.20g%+.20g",(double) bounds.width,(double)
3616 bounds.height,(double) bounds.x,(double) bounds.y);
3617 (void) SetImageArtifact(image,key,geometry);
3618 (void) GetNextToken(q,&q,extent,token);
3619 break;
3620 }
3621 if (LocaleCompare("symbol",token) == 0)
3622 {
3623 symbolDepth++;
3624 graphic_context[n]->render=symbolDepth > 0 ? MagickFalse :
3625 MagickTrue;
3626 break;
3627 }
3628 status=MagickFalse;
3629 break;
3630 }
3631 status=MagickFalse;
3632 break;
3633 }
3634 case 'r':
3635 case 'R':
3636 {
3637 if (LocaleCompare("rectangle",keyword) == 0)
3638 {
3639 primitive_type=RectanglePrimitive;
3640 break;
3641 }
3642 if (LocaleCompare("rotate",keyword) == 0)
3643 {
3644 (void) GetNextToken(q,&q,extent,token);
3645 angle=GetDrawValue(token,&next_token);
3646 if (token == next_token)
3647 ThrowPointExpectedException(image,token);
3648 affine.sx=cos(DegreesToRadians(fmod((double) angle,360.0)));
3649 affine.rx=sin(DegreesToRadians(fmod((double) angle,360.0)));
3650 affine.ry=(-sin(DegreesToRadians(fmod((double) angle,360.0))));
3651 affine.sy=cos(DegreesToRadians(fmod((double) angle,360.0)));
3652 break;
3653 }
3654 if (LocaleCompare("roundRectangle",keyword) == 0)
3655 {
3656 primitive_type=RoundRectanglePrimitive;
3657 break;
3658 }
3659 status=MagickFalse;
3660 break;
3661 }
3662 case 's':
3663 case 'S':
3664 {
3665 if (LocaleCompare("scale",keyword) == 0)
3666 {
3667 (void) GetNextToken(q,&q,extent,token);
3668 affine.sx=GetDrawValue(token,&next_token);
3669 if (token == next_token)
3670 ThrowPointExpectedException(image,token);
3671 (void) GetNextToken(q,&q,extent,token);
3672 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
3673 ThrowPointExpectedException(image,token);
3674 if (*token == ',')
3675 (void) GetNextToken(q,&q,extent,token);
3676 affine.sy=GetDrawValue(token,&next_token);
3677 if (token == next_token)
3678 ThrowPointExpectedException(image,token);
3679 break;
3680 }
3681 if (LocaleCompare("skewX",keyword) == 0)
3682 {
3683 (void) GetNextToken(q,&q,extent,token);
3684 angle=GetDrawValue(token,&next_token);
3685 if (token == next_token)
3686 ThrowPointExpectedException(image,token);
3687 affine.ry=sin(DegreesToRadians(angle));
3688 break;
3689 }
3690 if (LocaleCompare("skewY",keyword) == 0)
3691 {
3692 (void) GetNextToken(q,&q,extent,token);
3693 angle=GetDrawValue(token,&next_token);
3694 if (token == next_token)
3695 ThrowPointExpectedException(image,token);
3696 affine.rx=(-tan(DegreesToRadians(angle)/2.0));
3697 break;
3698 }
3699 if (LocaleCompare("stop-color",keyword) == 0)
3700 {
3701 GradientType
3702 type;
3703
3704 PixelPacket
3705 stop_color;
3706
3707 (void) GetNextToken(q,&q,extent,token);
3708 status&=QueryColorDatabase(token,&stop_color,&image->exception);
3709 type=LinearGradient;
3710 if (draw_info->gradient.type == RadialGradient)
3711 type=RadialGradient;
3712 (void) GradientImage(image,type,PadSpread,&start_color,&stop_color);
3713 start_color=stop_color;
3714 (void) GetNextToken(q,&q,extent,token);
3715 break;
3716 }
3717 if (LocaleCompare("stroke",keyword) == 0)
3718 {
3719 const char
3720 *mvg_class;
3721
3722 (void) GetNextToken(q,&q,extent,token);
3723 if (graphic_context[n]->clip_path != MagickFalse)
3724 break;
3725 mvg_class=(const char *) GetValueFromSplayTree(macros,token);
3726 if (mvg_class != (const char *) NULL)
3727 {
3728 (void) DrawPatternPath(image,draw_info,mvg_class,
3729 &graphic_context[n]->stroke_pattern);
3730 break;
3731 }
3732 (void) FormatLocaleString(pattern,MaxTextExtent,"%s",token);
3733 if (GetImageArtifact(image,pattern) != (const char *) NULL)
3734 {
3735 (void) DrawPatternPath(image,draw_info,token,
3736 &graphic_context[n]->stroke_pattern);
3737 break;
3738 }
3739 status&=QueryColorDatabase(token,&graphic_context[n]->stroke,
3740 &image->exception);
3741 if (graphic_context[n]->stroke_opacity != (MagickRealType) OpaqueOpacity)
3742 graphic_context[n]->stroke.opacity=ClampToQuantum(
3743 graphic_context[n]->stroke_opacity);
3744 break;
3745 }
3746 if (LocaleCompare("stroke-antialias",keyword) == 0)
3747 {
3748 (void) GetNextToken(q,&q,extent,token);
3749 graphic_context[n]->stroke_antialias=StringToLong(token) != 0 ?
3750 MagickTrue : MagickFalse;
3751 break;
3752 }
3753 if (LocaleCompare("stroke-dasharray",keyword) == 0)
3754 {
3755 if (graphic_context[n]->dash_pattern != (double *) NULL)
3756 graphic_context[n]->dash_pattern=(double *)
3757 RelinquishMagickMemory(graphic_context[n]->dash_pattern);
3758 if (IsValidPoint(q) != MagickFalse)
3759 {
3760 const char
3761 *p;
3762
3763 p=q;
3764 (void) GetNextToken(p,&p,extent,token);
3765 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
3766 ThrowPointExpectedException(image,token);
3767 if (*token == ',')
3768 (void) GetNextToken(p,&p,extent,token);
3769 for (x=0; IsValidPoint(token) != MagickFalse; x++)
3770 {
3771 (void) GetNextToken(p,&p,extent,token);
3772 if (*token == ',')
3773 (void) GetNextToken(p,&p,extent,token);
3774 }
3775 graphic_context[n]->dash_pattern=(double *)
3776 AcquireQuantumMemory((size_t) (2*x+2),
3777 sizeof(*graphic_context[n]->dash_pattern));
3778 if (graphic_context[n]->dash_pattern == (double *) NULL)
3779 {
3780 (void) ThrowMagickException(&image->exception,
3781 GetMagickModule(),ResourceLimitError,
3782 "MemoryAllocationFailed","`%s'",image->filename);
3783 status=MagickFalse;
3784 break;
3785 }
3786 (void) memset(graphic_context[n]->dash_pattern,0,(size_t)
3787 (2*x+2)*sizeof(*graphic_context[n]->dash_pattern));
3788 for (j=0; j < x; j++)
3789 {
3790 (void) GetNextToken(q,&q,extent,token);
3791 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
3792 ThrowPointExpectedException(image,token);
3793 if (*token == ',')
3794 (void) GetNextToken(q,&q,extent,token);
3795 graphic_context[n]->dash_pattern[j]=GetDrawValue(token,
3796 &next_token);
3797 if (token == next_token)
3798 ThrowPointExpectedException(image,token);
3799 if (graphic_context[n]->dash_pattern[j] <= 0.0)
3800 status=MagickFalse;
3801 }
3802 if (((x & 0x01) != 0) && (j == x))
3803 for ( ; j < (2*x); j++)
3804 graphic_context[n]->dash_pattern[j]=
3805 graphic_context[n]->dash_pattern[j-x];
3806 graphic_context[n]->dash_pattern[j]=0.0;
3807 break;
3808 }
3809 (void) GetNextToken(q,&q,extent,token);
3810 break;
3811 }
3812 if (LocaleCompare("stroke-dashoffset",keyword) == 0)
3813 {
3814 (void) GetNextToken(q,&q,extent,token);
3815 graphic_context[n]->dash_offset=GetDrawValue(token,&next_token);
3816 if (token == next_token)
3817 ThrowPointExpectedException(image,token);
3818 break;
3819 }
3820 if (LocaleCompare("stroke-linecap",keyword) == 0)
3821 {
3822 ssize_t
3823 linecap;
3824
3825 (void) GetNextToken(q,&q,extent,token);
3826 linecap=ParseCommandOption(MagickLineCapOptions,MagickFalse,token);
3827 if (linecap == -1)
3828 {
3829 status=MagickFalse;
3830 break;
3831 }
3832 graphic_context[n]->linecap=(LineCap) linecap;
3833 break;
3834 }
3835 if (LocaleCompare("stroke-linejoin",keyword) == 0)
3836 {
3837 ssize_t
3838 linejoin;
3839
3840 (void) GetNextToken(q,&q,extent,token);
3841 linejoin=ParseCommandOption(MagickLineJoinOptions,MagickFalse,
3842 token);
3843 if (linejoin == -1)
3844 {
3845 status=MagickFalse;
3846 break;
3847 }
3848 graphic_context[n]->linejoin=(LineJoin) linejoin;
3849 break;
3850 }
3851 if (LocaleCompare("stroke-miterlimit",keyword) == 0)
3852 {
3853 (void) GetNextToken(q,&q,extent,token);
3854 graphic_context[n]->miterlimit=StringToUnsignedLong(token);
3855 break;
3856 }
3857 if (LocaleCompare("stroke-opacity",keyword) == 0)
3858 {
3859 double
3860 opacity;
3861
3862 (void) GetNextToken(q,&q,extent,token);
3863 if (graphic_context[n]->clip_path != MagickFalse)
3864 break;
3865 factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
3866 opacity=MagickMin(MagickMax(factor*
3867 GetDrawValue(token,&next_token),0.0),1.0);
3868 if (token == next_token)
3869 ThrowPointExpectedException(image,token);
3870 if (graphic_context[n]->compliance == SVGCompliance)
3871 graphic_context[n]->stroke_opacity*=(1.0-opacity);
3872 else
3873 graphic_context[n]->stroke_opacity=((MagickRealType) QuantumRange-
3874 graphic_context[n]->stroke_opacity)*(1.0-opacity);
3875 if (graphic_context[n]->stroke.opacity != TransparentOpacity)
3876 graphic_context[n]->stroke.opacity=(Quantum)
3877 graphic_context[n]->stroke_opacity;
3878 else
3879 graphic_context[n]->stroke.opacity=ClampToQuantum(
3880 (MagickRealType) QuantumRange*opacity);
3881 break;
3882 }
3883 if (LocaleCompare("stroke-width",keyword) == 0)
3884 {
3885 (void) GetNextToken(q,&q,extent,token);
3886 if (graphic_context[n]->clip_path != MagickFalse)
3887 break;
3888 graphic_context[n]->stroke_width=GetDrawValue(token,&next_token);
3889 if ((token == next_token) ||
3890 (graphic_context[n]->stroke_width < 0.0))
3891 ThrowPointExpectedException(image,token);
3892 break;
3893 }
3894 status=MagickFalse;
3895 break;
3896 }
3897 case 't':
3898 case 'T':
3899 {
3900 if (LocaleCompare("text",keyword) == 0)
3901 {
3902 primitive_type=TextPrimitive;
3903 cursor=0.0;
3904 break;
3905 }
3906 if (LocaleCompare("text-align",keyword) == 0)
3907 {
3908 ssize_t
3909 align;
3910
3911 (void) GetNextToken(q,&q,extent,token);
3912 align=ParseCommandOption(MagickAlignOptions,MagickFalse,token);
3913 if (align == -1)
3914 {
3915 status=MagickFalse;
3916 break;
3917 }
3918 graphic_context[n]->align=(AlignType) align;
3919 break;
3920 }
3921 if (LocaleCompare("text-anchor",keyword) == 0)
3922 {
3923 ssize_t
3924 align;
3925
3926 (void) GetNextToken(q,&q,extent,token);
3927 align=ParseCommandOption(MagickAlignOptions,MagickFalse,token);
3928 if (align == -1)
3929 {
3930 status=MagickFalse;
3931 break;
3932 }
3933 graphic_context[n]->align=(AlignType) align;
3934 break;
3935 }
3936 if (LocaleCompare("text-antialias",keyword) == 0)
3937 {
3938 (void) GetNextToken(q,&q,extent,token);
3939 graphic_context[n]->text_antialias=StringToLong(token) != 0 ?
3940 MagickTrue : MagickFalse;
3941 break;
3942 }
3943 if (LocaleCompare("text-undercolor",keyword) == 0)
3944 {
3945 (void) GetNextToken(q,&q,extent,token);
3946 status&=QueryColorDatabase(token,&graphic_context[n]->undercolor,
3947 &image->exception);
3948 break;
3949 }
3950 if (LocaleCompare("translate",keyword) == 0)
3951 {
3952 (void) GetNextToken(q,&q,extent,token);
3953 affine.tx=GetDrawValue(token,&next_token);
3954 if (token == next_token)
3955 ThrowPointExpectedException(image,token);
3956 (void) GetNextToken(q,&q,extent,token);
3957 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
3958 ThrowPointExpectedException(image,token);
3959 if (*token == ',')
3960 (void) GetNextToken(q,&q,extent,token);
3961 affine.ty=GetDrawValue(token,&next_token);
3962 if (token == next_token)
3963 ThrowPointExpectedException(image,token);
3964 break;
3965 }
3966 status=MagickFalse;
3967 break;
3968 }
3969 case 'u':
3970 case 'U':
3971 {
3972 if (LocaleCompare("use",keyword) == 0)
3973 {
3974 const char
3975 *use;
3976
3977 /*
3978 Get a macro from the MVG document, and "use" it here.
3979 */
3980 (void) GetNextToken(q,&q,extent,token);
3981 use=(const char *) GetValueFromSplayTree(macros,token);
3982 if (use != (const char *) NULL)
3983 {
3984 clone_info=CloneDrawInfo((ImageInfo *) NULL,graphic_context[n]);
3985 (void) CloneString(&clone_info->primitive,use);
3986 status=RenderMVGContent(image,clone_info,depth+1);
3987 clone_info=DestroyDrawInfo(clone_info);
3988 }
3989 break;
3990 }
3991 status=MagickFalse;
3992 break;
3993 }
3994 case 'v':
3995 case 'V':
3996 {
3997 if (LocaleCompare("viewbox",keyword) == 0)
3998 {
3999 (void) GetNextToken(q,&q,extent,token);
4000 graphic_context[n]->viewbox.x=CastDoubleToLong(ceil(
4001 GetDrawValue(token,&next_token)-0.5));
4002 if (token == next_token)
4003 ThrowPointExpectedException(image,token);
4004 (void) GetNextToken(q,&q,extent,token);
4005 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
4006 ThrowPointExpectedException(image,token);
4007 if (*token == ',')
4008 (void) GetNextToken(q,&q,extent,token);
4009 graphic_context[n]->viewbox.y=CastDoubleToLong(ceil(
4010 GetDrawValue(token,&next_token)-0.5));
4011 if (token == next_token)
4012 ThrowPointExpectedException(image,token);
4013 (void) GetNextToken(q,&q,extent,token);
4014 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
4015 ThrowPointExpectedException(image,token);
4016 if (*token == ',')
4017 (void) GetNextToken(q,&q,extent,token);
4018 graphic_context[n]->viewbox.width=CastDoubleToUnsigned(
4019 GetDrawValue(token,&next_token)+0.5);
4020 if (token == next_token)
4021 ThrowPointExpectedException(image,token);
4022 (void) GetNextToken(q,&q,extent,token);
4023 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
4024 ThrowPointExpectedException(image,token);
4025 if (*token == ',')
4026 (void) GetNextToken(q,&q,extent,token);
4027 graphic_context[n]->viewbox.height=CastDoubleToUnsigned(
4028 GetDrawValue(token,&next_token)+0.5);
4029 if (token == next_token)
4030 ThrowPointExpectedException(image,token);
4031 break;
4032 }
4033 status=MagickFalse;
4034 break;
4035 }
4036 case 'w':
4037 case 'W':
4038 {
4039 if (LocaleCompare("word-spacing",keyword) == 0)
4040 {
4041 (void) GetNextToken(q,&q,extent,token);
4042 graphic_context[n]->interword_spacing=GetDrawValue(token,
4043 &next_token);
4044 if (token == next_token)
4045 ThrowPointExpectedException(image,token);
4046 break;
4047 }
4048 status=MagickFalse;
4049 break;
4050 }
4051 default:
4052 {
4053 status=MagickFalse;
4054 break;
4055 }
4056 }
4057 if (status == MagickFalse)
4058 break;
4059 if ((fabs(affine.sx-1.0) >= MagickEpsilon) ||
4060 (fabs(affine.rx) >= MagickEpsilon) || (fabs(affine.ry) >= MagickEpsilon) ||
4061 (fabs(affine.sy-1.0) >= MagickEpsilon) ||
4062 (fabs(affine.tx) >= MagickEpsilon) || (fabs(affine.ty) >= MagickEpsilon))
4063 {
4064 graphic_context[n]->affine.sx=current.sx*affine.sx+current.ry*affine.rx;
4065 graphic_context[n]->affine.rx=current.rx*affine.sx+current.sy*affine.rx;
4066 graphic_context[n]->affine.ry=current.sx*affine.ry+current.ry*affine.sy;
4067 graphic_context[n]->affine.sy=current.rx*affine.ry+current.sy*affine.sy;
4068 graphic_context[n]->affine.tx=current.sx*affine.tx+current.ry*affine.ty+
4069 current.tx;
4070 graphic_context[n]->affine.ty=current.rx*affine.tx+current.sy*affine.ty+
4071 current.ty;
4072 }
4073 if (primitive_type == UndefinedPrimitive)
4074 {
4075 if ((draw_info->debug != MagickFalse) && (q > p))
4076 (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int)
4077 (q-p-1),p);
4078 continue;
4079 }
4080 /*
4081 Parse the primitive attributes.
4082 */
4083 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
4084 if (primitive_info[i].text != (char *) NULL)
4085 primitive_info[i].text=DestroyString(primitive_info[i].text);
4086 i=0;
4087 mvg_info.offset=i;
4088 j=0;
4089 primitive_info[0].primitive=primitive_type;
4090 primitive_info[0].point.x=0.0;
4091 primitive_info[0].point.y=0.0;
4092 primitive_info[0].coordinates=0;
4093 primitive_info[0].method=FloodfillMethod;
4094 primitive_info[0].closed_subpath=MagickFalse;
4095 for (x=0; *q != '\0'; x++)
4096 {
4097 /*
4098 Define points.
4099 */
4100 if (IsValidPoint(q) == MagickFalse)
4101 break;
4102 (void) GetNextToken(q,&q,extent,token);
4103 point.x=GetDrawValue(token,&next_token);
4104 if (token == next_token)
4105 ThrowPointExpectedException(image,token);
4106 (void) GetNextToken(q,&q,extent,token);
4107 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
4108 ThrowPointExpectedException(image,token);
4109 if (*token == ',')
4110 (void) GetNextToken(q,&q,extent,token);
4111 point.y=GetDrawValue(token,&next_token);
4112 if (token == next_token)
4113 ThrowPointExpectedException(image,token);
4114 (void) GetNextToken(q,(const char **) NULL,extent,token);
4115 if (*token == ',')
4116 (void) GetNextToken(q,&q,extent,token);
4117 primitive_info[i].primitive=primitive_type;
4118 primitive_info[i].point=point;
4119 primitive_info[i].coordinates=0;
4120 primitive_info[i].method=FloodfillMethod;
4121 primitive_info[i].closed_subpath=MagickFalse;
4122 i++;
4123 mvg_info.offset=i;
4124 if (i < (ssize_t) number_points)
4125 continue;
4126 status&=CheckPrimitiveExtent(&mvg_info,(double) number_points);
4127 primitive_info=(*mvg_info.primitive_info);
4128 if (status == MagickFalse)
4129 break;
4130 }
4131 if (status == MagickFalse)
4132 break;
4133 if (primitive_info[j].text != (char *) NULL)
4134 primitive_info[j].text=DestroyString(primitive_info[j].text);
4135 primitive_info[j].primitive=primitive_type;
4136 primitive_info[j].coordinates=(size_t) x;
4137 primitive_info[j].method=FloodfillMethod;
4138 primitive_info[j].closed_subpath=MagickFalse;
4139 /*
4140 Circumscribe primitive within a circle.
4141 */
4142 bounds.x1=primitive_info[j].point.x;
4143 bounds.y1=primitive_info[j].point.y;
4144 bounds.x2=primitive_info[j].point.x;
4145 bounds.y2=primitive_info[j].point.y;
4146 for (k=1; k < (ssize_t) primitive_info[j].coordinates; k++)
4147 {
4148 point=primitive_info[j+k].point;
4149 if (point.x < bounds.x1)
4150 bounds.x1=point.x;
4151 if (point.y < bounds.y1)
4152 bounds.y1=point.y;
4153 if (point.x > bounds.x2)
4154 bounds.x2=point.x;
4155 if (point.y > bounds.y2)
4156 bounds.y2=point.y;
4157 }
4158 /*
4159 Speculate how many points our primitive might consume.
4160 */
4161 coordinates=(double) primitive_info[j].coordinates;
4162 switch (primitive_type)
4163 {
4164 case RectanglePrimitive:
4165 {
4166 coordinates*=5.0;
4167 break;
4168 }
4169 case RoundRectanglePrimitive:
4170 {
4171 double
4172 alpha,
4173 beta,
4174 radius;
4175
4176 alpha=bounds.x2-bounds.x1;
4177 beta=bounds.y2-bounds.y1;
4178 radius=hypot(alpha,beta);
4179 coordinates*=5.0;
4180 coordinates+=2.0*((size_t) ceil((double) MagickPI*radius))+6.0*
4181 BezierQuantum+360.0;
4182 break;
4183 }
4184 case BezierPrimitive:
4185 {
4186 coordinates=(BezierQuantum*(double) primitive_info[j].coordinates);
4187 break;
4188 }
4189 case PathPrimitive:
4190 {
4191 char
4192 *s,
4193 *t;
4194
4195 (void) GetNextToken(q,&q,extent,token);
4196 coordinates=1.0;
4197 t=token;
4198 for (s=token; *s != '\0'; s=t)
4199 {
4200 double
4201 value;
4202
4203 value=GetDrawValue(s,&t);
4204 (void) value;
4205 if (s == t)
4206 {
4207 t++;
4208 continue;
4209 }
4210 coordinates++;
4211 }
4212 for (s=token; *s != '\0'; s++)
4213 if (strspn(s,"AaCcQqSsTt") != 0)
4214 coordinates+=(20.0*BezierQuantum)+360.0;
4215 break;
4216 }
4217 default:
4218 break;
4219 }
4220 if (status == MagickFalse)
4221 break;
4222 if (((size_t) (i+coordinates)) >= number_points)
4223 {
4224 /*
4225 Resize based on speculative points required by primitive.
4226 */
4227 number_points+=coordinates+1;
4228 if (number_points < (size_t) coordinates)
4229 {
4230 (void) ThrowMagickException(&image->exception,GetMagickModule(),
4231 ResourceLimitError,"MemoryAllocationFailed","`%s'",
4232 image->filename);
4233 status=MagickFalse;
4234 break;
4235 }
4236 mvg_info.offset=i;
4237 status&=CheckPrimitiveExtent(&mvg_info,(double) number_points);
4238 primitive_info=(*mvg_info.primitive_info);
4239 if (status == MagickFalse)
4240 break;
4241 }
4242 status&=CheckPrimitiveExtent(&mvg_info,PrimitiveExtentPad);
4243 primitive_info=(*mvg_info.primitive_info);
4244 if (status == MagickFalse)
4245 break;
4246 mvg_info.offset=j;
4247 switch (primitive_type)
4248 {
4249 case PointPrimitive:
4250 default:
4251 {
4252 if (primitive_info[j].coordinates != 1)
4253 {
4254 status=MagickFalse;
4255 break;
4256 }
4257 status&=TracePoint(primitive_info+j,primitive_info[j].point);
4258 primitive_info=(*mvg_info.primitive_info);
4259 if (status == MagickFalse)
4260 break;
4261 i=(ssize_t) (j+primitive_info[j].coordinates);
4262 break;
4263 }
4264 case LinePrimitive:
4265 {
4266 if (primitive_info[j].coordinates != 2)
4267 {
4268 status=MagickFalse;
4269 break;
4270 }
4271 status&=TraceLine(primitive_info+j,primitive_info[j].point,
4272 primitive_info[j+1].point);
4273 primitive_info=(*mvg_info.primitive_info);
4274 if (status == MagickFalse)
4275 break;
4276 i=(ssize_t) (j+primitive_info[j].coordinates);
4277 break;
4278 }
4279 case RectanglePrimitive:
4280 {
4281 if (primitive_info[j].coordinates != 2)
4282 {
4283 status=MagickFalse;
4284 break;
4285 }
4286 status&=TraceRectangle(primitive_info+j,primitive_info[j].point,
4287 primitive_info[j+1].point);
4288 primitive_info=(*mvg_info.primitive_info);
4289 if (status == MagickFalse)
4290 break;
4291 i=(ssize_t) (j+primitive_info[j].coordinates);
4292 break;
4293 }
4294 case RoundRectanglePrimitive:
4295 {
4296 if (primitive_info[j].coordinates != 3)
4297 {
4298 status=MagickFalse;
4299 break;
4300 }
4301 if ((primitive_info[j+2].point.x < 0.0) ||
4302 (primitive_info[j+2].point.y < 0.0))
4303 {
4304 status=MagickFalse;
4305 break;
4306 }
4307 if ((primitive_info[j+1].point.x-primitive_info[j].point.x) < 0.0)
4308 {
4309 status=MagickFalse;
4310 break;
4311 }
4312 if ((primitive_info[j+1].point.y-primitive_info[j].point.y) < 0.0)
4313 {
4314 status=MagickFalse;
4315 break;
4316 }
4317 status&=TraceRoundRectangle(&mvg_info,primitive_info[j].point,
4318 primitive_info[j+1].point,primitive_info[j+2].point);
4319 primitive_info=(*mvg_info.primitive_info);
4320 if (status == MagickFalse)
4321 break;
4322 i=(ssize_t) (j+primitive_info[j].coordinates);
4323 break;
4324 }
4325 case ArcPrimitive:
4326 {
4327 if (primitive_info[j].coordinates != 3)
4328 {
4329 status=MagickFalse;
4330 break;
4331 }
4332 status&=TraceArc(&mvg_info,primitive_info[j].point,
4333 primitive_info[j+1].point,primitive_info[j+2].point);
4334 primitive_info=(*mvg_info.primitive_info);
4335 if (status == MagickFalse)
4336 break;
4337 i=(ssize_t) (j+primitive_info[j].coordinates);
4338 break;
4339 }
4340 case EllipsePrimitive:
4341 {
4342 if (primitive_info[j].coordinates != 3)
4343 {
4344 status=MagickFalse;
4345 break;
4346 }
4347 if ((primitive_info[j+1].point.x < 0.0) ||
4348 (primitive_info[j+1].point.y < 0.0))
4349 {
4350 status=MagickFalse;
4351 break;
4352 }
4353 status&=TraceEllipse(&mvg_info,primitive_info[j].point,
4354 primitive_info[j+1].point,primitive_info[j+2].point);
4355 primitive_info=(*mvg_info.primitive_info);
4356 if (status == MagickFalse)
4357 break;
4358 i=(ssize_t) (j+primitive_info[j].coordinates);
4359 break;
4360 }
4361 case CirclePrimitive:
4362 {
4363 if (primitive_info[j].coordinates != 2)
4364 {
4365 status=MagickFalse;
4366 break;
4367 }
4368 status&=TraceCircle(&mvg_info,primitive_info[j].point,
4369 primitive_info[j+1].point);
4370 primitive_info=(*mvg_info.primitive_info);
4371 if (status == MagickFalse)
4372 break;
4373 i=(ssize_t) (j+primitive_info[j].coordinates);
4374 break;
4375 }
4376 case PolylinePrimitive:
4377 {
4378 if (primitive_info[j].coordinates < 1)
4379 {
4380 status=MagickFalse;
4381 break;
4382 }
4383 break;
4384 }
4385 case PolygonPrimitive:
4386 {
4387 if (primitive_info[j].coordinates < 3)
4388 {
4389 status=MagickFalse;
4390 break;
4391 }
4392 primitive_info[i]=primitive_info[j];
4393 primitive_info[i].coordinates=0;
4394 primitive_info[j].coordinates++;
4395 primitive_info[j].closed_subpath=MagickTrue;
4396 i++;
4397 break;
4398 }
4399 case BezierPrimitive:
4400 {
4401 if (primitive_info[j].coordinates < 3)
4402 {
4403 status=MagickFalse;
4404 break;
4405 }
4406 status&=TraceBezier(&mvg_info,primitive_info[j].coordinates);
4407 primitive_info=(*mvg_info.primitive_info);
4408 if (status == MagickFalse)
4409 break;
4410 i=(ssize_t) (j+primitive_info[j].coordinates);
4411 break;
4412 }
4413 case PathPrimitive:
4414 {
4415 coordinates=(double) TracePath(image,&mvg_info,token);
4416 primitive_info=(*mvg_info.primitive_info);
4417 if (status == MagickFalse)
4418 break;
4419 if (coordinates < 0.0)
4420 {
4421 status=MagickFalse;
4422 break;
4423 }
4424 i=(ssize_t) (j+coordinates);
4425 break;
4426 }
4427 case ColorPrimitive:
4428 case MattePrimitive:
4429 {
4430 ssize_t
4431 method;
4432
4433 if (primitive_info[j].coordinates != 1)
4434 {
4435 status=MagickFalse;
4436 break;
4437 }
4438 (void) GetNextToken(q,&q,extent,token);
4439 method=ParseCommandOption(MagickMethodOptions,MagickFalse,token);
4440 if (method == -1)
4441 {
4442 status=MagickFalse;
4443 break;
4444 }
4445 primitive_info[j].method=(PaintMethod) method;
4446 break;
4447 }
4448 case TextPrimitive:
4449 {
4450 char
4451 geometry[MagickPathExtent];
4452
4453 if (primitive_info[j].coordinates != 1)
4454 {
4455 status=MagickFalse;
4456 break;
4457 }
4458 if (*token != ',')
4459 (void) GetNextToken(q,&q,extent,token);
4460 (void) CloneString(&primitive_info[j].text,token);
4461 /*
4462 Compute text cursor offset.
4463 */
4464 clone_info=CloneDrawInfo((ImageInfo *) NULL,graphic_context[n]);
4465 if ((fabs(mvg_info.point.x-primitive_info->point.x) < MagickEpsilon) &&
4466 (fabs(mvg_info.point.y-primitive_info->point.y) < MagickEpsilon))
4467 {
4468 mvg_info.point=primitive_info->point;
4469 primitive_info->point.x+=cursor;
4470 }
4471 else
4472 {
4473 mvg_info.point=primitive_info->point;
4474 cursor=0.0;
4475 }
4476 (void) FormatLocaleString(geometry,MagickPathExtent,"%+f%+f",
4477 primitive_info->point.x,primitive_info->point.y);
4478 clone_info->render=MagickFalse;
4479 clone_info->text=AcquireString(token);
4480 status&=GetTypeMetrics(image,clone_info,&metrics);
4481 clone_info=DestroyDrawInfo(clone_info);
4482 cursor+=metrics.width;
4483 if (graphic_context[n]->compliance != SVGCompliance)
4484 cursor=0.0;
4485 break;
4486 }
4487 case ImagePrimitive:
4488 {
4489 if (primitive_info[j].coordinates != 2)
4490 {
4491 status=MagickFalse;
4492 break;
4493 }
4494 (void) GetNextToken(q,&q,extent,token);
4495 (void) CloneString(&primitive_info[j].text,token);
4496 break;
4497 }
4498 }
4499 mvg_info.offset=i;
4500 if (status == 0)
4501 break;
4502 primitive_info[i].primitive=UndefinedPrimitive;
4503 if ((draw_info->debug != MagickFalse) && (q > p))
4504 (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int) (q-p),p);
4505 /*
4506 Sanity check.
4507 */
4508 status&=CheckPrimitiveExtent(&mvg_info,ExpandAffine(
4509 &graphic_context[n]->affine));
4510 primitive_info=(*mvg_info.primitive_info);
4511 if (status == 0)
4512 break;
4513 status&=CheckPrimitiveExtent(&mvg_info,(double)
4514 graphic_context[n]->stroke_width);
4515 primitive_info=(*mvg_info.primitive_info);
4516 if (status == 0)
4517 break;
4518 if (i == 0)
4519 continue;
4520 /*
4521 Transform points.
4522 */
4523 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
4524 {
4525 point=primitive_info[i].point;
4526 primitive_info[i].point.x=graphic_context[n]->affine.sx*point.x+
4527 graphic_context[n]->affine.ry*point.y+graphic_context[n]->affine.tx;
4528 primitive_info[i].point.y=graphic_context[n]->affine.rx*point.x+
4529 graphic_context[n]->affine.sy*point.y+graphic_context[n]->affine.ty;
4530 point=primitive_info[i].point;
4531 if (point.x < graphic_context[n]->bounds.x1)
4532 graphic_context[n]->bounds.x1=point.x;
4533 if (point.y < graphic_context[n]->bounds.y1)
4534 graphic_context[n]->bounds.y1=point.y;
4535 if (point.x > graphic_context[n]->bounds.x2)
4536 graphic_context[n]->bounds.x2=point.x;
4537 if (point.y > graphic_context[n]->bounds.y2)
4538 graphic_context[n]->bounds.y2=point.y;
4539 if (primitive_info[i].primitive == ImagePrimitive)
4540 break;
4541 if (i >= (ssize_t) number_points)
4542 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
4543 }
4544 if (graphic_context[n]->render != MagickFalse)
4545 {
4546 if ((n != 0) && (graphic_context[n]->compliance != SVGCompliance) &&
4547 (graphic_context[n]->clip_mask != (char *) NULL) &&
4548 (LocaleCompare(graphic_context[n]->clip_mask,
4549 graphic_context[n-1]->clip_mask) != 0))
4550 {
4551 const char
4552 *clip_path;
4553
4554 clip_path=(const char *) GetValueFromSplayTree(macros,
4555 graphic_context[n]->clip_mask);
4556 if (clip_path != (const char *) NULL)
4557 (void) SetImageArtifact(image,graphic_context[n]->clip_mask,
4558 clip_path);
4559 status&=DrawClipPath(image,graphic_context[n],
4560 graphic_context[n]->clip_mask);
4561 }
4562 status&=DrawPrimitive(image,graphic_context[n],primitive_info);
4563 }
4564 proceed=SetImageProgress(image,RenderImageTag,q-primitive,(MagickSizeType)
4565 primitive_extent);
4566 if (proceed == MagickFalse)
4567 break;
4568 if (status == 0)
4569 break;
4570 }
4571 if (draw_info->debug != MagickFalse)
4572 (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end draw-image");
4573 /*
4574 Relinquish resources.
4575 */
4576 macros=DestroySplayTree(macros);
4577 token=DestroyString(token);
4578 if (primitive_info != (PrimitiveInfo *) NULL)
4579 {
4580 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
4581 if (primitive_info[i].text != (char *) NULL)
4582 primitive_info[i].text=DestroyString(primitive_info[i].text);
4583 primitive_info=(PrimitiveInfo *) RelinquishMagickMemory(primitive_info);
4584 }
4585 primitive=DestroyString(primitive);
4586 for ( ; n >= 0; n--)
4587 graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
4588 graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
4589 if (status == MagickFalse)
4590 ThrowBinaryImageException(DrawError,
4591 "NonconformingDrawingPrimitiveDefinition",keyword);
4592 return(status != 0 ? MagickTrue : MagickFalse);
4593}
4594
4595MagickExport MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info)
4596{
4597 return(RenderMVGContent(image,draw_info,0));
4598}
4599␌
4600/*
4601%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4602% %
4603% %
4604% %
4605% D r a w P a t t e r n P a t h %
4606% %
4607% %
4608% %
4609%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4610%
4611% DrawPatternPath() draws a pattern.
4612%
4613% The format of the DrawPatternPath method is:
4614%
4615% MagickBooleanType DrawPatternPath(Image *image,const DrawInfo *draw_info,
4616% const char *name,Image **pattern)
4617%
4618% A description of each parameter follows:
4619%
4620% o image: the image.
4621%
4622% o draw_info: the draw info.
4623%
4624% o name: the pattern name.
4625%
4626% o image: the image.
4627%
4628*/
4629MagickExport MagickBooleanType DrawPatternPath(Image *image,
4630 const DrawInfo *draw_info,const char *name,Image **pattern)
4631{
4632 char
4633 property[MaxTextExtent];
4634
4635 const char
4636 *geometry,
4637 *path,
4638 *type;
4639
4640 DrawInfo
4641 *clone_info;
4642
4643 ImageInfo
4644 *image_info;
4645
4646 MagickBooleanType
4647 status;
4648
4649 assert(image != (Image *) NULL);
4650 assert(image->signature == MagickCoreSignature);
4651 assert(draw_info != (const DrawInfo *) NULL);
4652 if (IsEventLogging() != MagickFalse)
4653 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
4654 assert(name != (const char *) NULL);
4655 (void) FormatLocaleString(property,MaxTextExtent,"%s",name);
4656 path=GetImageArtifact(image,property);
4657 if (path == (const char *) NULL)
4658 return(MagickFalse);
4659 (void) FormatLocaleString(property,MaxTextExtent,"%s-geometry",name);
4660 geometry=GetImageArtifact(image,property);
4661 if (geometry == (const char *) NULL)
4662 return(MagickFalse);
4663 if ((*pattern) != (Image *) NULL)
4664 *pattern=DestroyImage(*pattern);
4665 image_info=AcquireImageInfo();
4666 image_info->size=AcquireString(geometry);
4667 *pattern=AcquireImage(image_info);
4668 image_info=DestroyImageInfo(image_info);
4669 (void) QueryColorDatabase("#00000000",&(*pattern)->background_color,
4670 &image->exception);
4671 (void) SetImageBackgroundColor(*pattern);
4672 if (draw_info->debug != MagickFalse)
4673 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4674 "begin pattern-path %s %s",name,geometry);
4675 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4676 if (clone_info->fill_pattern != (Image *) NULL)
4677 clone_info->fill_pattern=DestroyImage(clone_info->fill_pattern);
4678 if (clone_info->stroke_pattern != (Image *) NULL)
4679 clone_info->stroke_pattern=DestroyImage(clone_info->stroke_pattern);
4680 (void) FormatLocaleString(property,MaxTextExtent,"%s-type",name);
4681 type=GetImageArtifact(image,property);
4682 if (type != (const char *) NULL)
4683 clone_info->gradient.type=(GradientType) ParseCommandOption(
4684 MagickGradientOptions,MagickFalse,type);
4685 (void) CloneString(&clone_info->primitive,path);
4686 status=RenderMVGContent(*pattern,clone_info,0);
4687 clone_info=DestroyDrawInfo(clone_info);
4688 if (draw_info->debug != MagickFalse)
4689 (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end pattern-path");
4690 return(status);
4691}
4692␌
4693/*
4694%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4695% %
4696% %
4697% %
4698+ D r a w P o l y g o n P r i m i t i v e %
4699% %
4700% %
4701% %
4702%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4703%
4704% DrawPolygonPrimitive() draws a polygon on the image.
4705%
4706% The format of the DrawPolygonPrimitive method is:
4707%
4708% MagickBooleanType DrawPolygonPrimitive(Image *image,
4709% const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
4710%
4711% A description of each parameter follows:
4712%
4713% o image: the image.
4714%
4715% o draw_info: the draw info.
4716%
4717% o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
4718%
4719*/
4720
4721static PolygonInfo **DestroyPolygonTLS(PolygonInfo **polygon_info)
4722{
4723 ssize_t
4724 i;
4725
4726 assert(polygon_info != (PolygonInfo **) NULL);
4727 for (i=0; i < (ssize_t) GetMagickResourceLimit(ThreadResource); i++)
4728 if (polygon_info[i] != (PolygonInfo *) NULL)
4729 polygon_info[i]=DestroyPolygonInfo(polygon_info[i]);
4730 polygon_info=(PolygonInfo **) RelinquishMagickMemory(polygon_info);
4731 return(polygon_info);
4732}
4733
4734static PolygonInfo **AcquirePolygonTLS(const DrawInfo *draw_info,
4735 const PrimitiveInfo *primitive_info,ExceptionInfo *exception)
4736{
4737 PathInfo
4738 *magick_restrict path_info;
4739
4740 PolygonInfo
4741 **polygon_info;
4742
4743 size_t
4744 number_threads;
4745
4746 number_threads=(size_t) GetMagickResourceLimit(ThreadResource);
4747 polygon_info=(PolygonInfo **) AcquireQuantumMemory(number_threads,
4748 sizeof(*polygon_info));
4749 if (polygon_info == (PolygonInfo **) NULL)
4750 {
4751 (void) ThrowMagickException(exception,GetMagickModule(),
4752 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4753 return((PolygonInfo **) NULL);
4754 }
4755 (void) memset(polygon_info,0,number_threads*sizeof(*polygon_info));
4756 path_info=ConvertPrimitiveToPath(draw_info,primitive_info,exception);
4757 if (path_info == (PathInfo *) NULL)
4758 return(DestroyPolygonTLS(polygon_info));
4759 polygon_info[0]=ConvertPathToPolygon(path_info,exception);
4760 if (polygon_info[0] == (PolygonInfo *) NULL)
4761 {
4762 (void) ThrowMagickException(exception,GetMagickModule(),
4763 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4764 return(DestroyPolygonTLS(polygon_info));
4765 }
4766 path_info=(PathInfo *) RelinquishMagickMemory(path_info);
4767 return(polygon_info);
4768}
4769
4770static MagickBooleanType AcquirePolygonEdgesTLS(PolygonInfo **polygon_info,
4771 const size_t number_threads,ExceptionInfo *exception)
4772{
4773 ssize_t
4774 i;
4775
4776 for (i=1; i < (ssize_t) number_threads; i++)
4777 {
4778 EdgeInfo
4779 *edge_info;
4780
4781 ssize_t
4782 j;
4783
4784 polygon_info[i]=(PolygonInfo *) AcquireMagickMemory(
4785 sizeof(*polygon_info[i]));
4786 if (polygon_info[i] == (PolygonInfo *) NULL)
4787 {
4788 (void) ThrowMagickException(exception,GetMagickModule(),
4789 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4790 return(MagickFalse);
4791 }
4792 polygon_info[i]->number_edges=0;
4793 edge_info=polygon_info[0]->edges;
4794 polygon_info[i]->edges=(EdgeInfo *) AcquireQuantumMemory(
4795 polygon_info[0]->number_edges,sizeof(*edge_info));
4796 if (polygon_info[i]->edges == (EdgeInfo *) NULL)
4797 {
4798 (void) ThrowMagickException(exception,GetMagickModule(),
4799 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4800 return(MagickFalse);
4801 }
4802 (void) memcpy(polygon_info[i]->edges,edge_info,
4803 polygon_info[0]->number_edges*sizeof(*edge_info));
4804 for (j=0; j < (ssize_t) polygon_info[i]->number_edges; j++)
4805 polygon_info[i]->edges[j].points=(PointInfo *) NULL;
4806 polygon_info[i]->number_edges=polygon_info[0]->number_edges;
4807 for (j=0; j < (ssize_t) polygon_info[i]->number_edges; j++)
4808 {
4809 edge_info=polygon_info[0]->edges+j;
4810 polygon_info[i]->edges[j].points=(PointInfo *) AcquireQuantumMemory(
4811 edge_info->number_points,sizeof(*edge_info));
4812 if (polygon_info[i]->edges[j].points == (PointInfo *) NULL)
4813 {
4814 (void) ThrowMagickException(exception,GetMagickModule(),
4815 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4816 return(MagickFalse);
4817 }
4818 (void) memcpy(polygon_info[i]->edges[j].points,edge_info->points,
4819 edge_info->number_points*sizeof(*edge_info->points));
4820 }
4821 }
4822 return(MagickTrue);
4823}
4824
4825static size_t DestroyEdge(PolygonInfo *polygon_info,const ssize_t edge)
4826{
4827 assert(edge < (ssize_t) polygon_info->number_edges);
4828 polygon_info->edges[edge].points=(PointInfo *) RelinquishMagickMemory(
4829 polygon_info->edges[edge].points);
4830 polygon_info->number_edges--;
4831 if (edge < (ssize_t) polygon_info->number_edges)
4832 (void) memmove(polygon_info->edges+edge,polygon_info->edges+edge+1,
4833 (size_t) (polygon_info->number_edges-edge)*sizeof(*polygon_info->edges));
4834 return(polygon_info->number_edges);
4835}
4836
4837static double GetOpacityPixel(PolygonInfo *polygon_info,const double mid,
4838 const MagickBooleanType fill,const FillRule fill_rule,const ssize_t x,
4839 const ssize_t y,double *stroke_opacity)
4840{
4841 double
4842 alpha,
4843 beta,
4844 distance,
4845 subpath_opacity;
4846
4847 PointInfo
4848 delta;
4849
4850 EdgeInfo
4851 *p;
4852
4853 const PointInfo
4854 *q;
4855
4856 ssize_t
4857 i;
4858
4859 ssize_t
4860 j,
4861 winding_number;
4862
4863 /*
4864 Compute fill & stroke opacity for this (x,y) point.
4865 */
4866 *stroke_opacity=0.0;
4867 subpath_opacity=0.0;
4868 p=polygon_info->edges;
4869 for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
4870 {
4871 if ((double) y <= (p->bounds.y1-mid-0.5))
4872 break;
4873 if ((double) y > (p->bounds.y2+mid+0.5))
4874 {
4875 p--;
4876 (void) DestroyEdge(polygon_info,j--);
4877 continue;
4878 }
4879 if (((double) x <= (p->bounds.x1-mid-0.5)) ||
4880 ((double) x > (p->bounds.x2+mid+0.5)))
4881 continue;
4882 i=(ssize_t) MagickMax((double) p->highwater,1.0);
4883 for ( ; i < (ssize_t) p->number_points; i++)
4884 {
4885 if ((double) y <= (p->points[i-1].y-mid-0.5))
4886 break;
4887 if ((double) y > (p->points[i].y+mid+0.5))
4888 continue;
4889 if (p->scanline != (double) y)
4890 {
4891 p->scanline=(double) y;
4892 p->highwater=(size_t) i;
4893 }
4894 /*
4895 Compute distance between a point and an edge.
4896 */
4897 q=p->points+i-1;
4898 delta.x=(q+1)->x-q->x;
4899 delta.y=(q+1)->y-q->y;
4900 beta=delta.x*(x-q->x)+delta.y*(y-q->y);
4901 if (beta <= 0.0)
4902 {
4903 delta.x=(double) x-q->x;
4904 delta.y=(double) y-q->y;
4905 distance=delta.x*delta.x+delta.y*delta.y;
4906 }
4907 else
4908 {
4909 alpha=delta.x*delta.x+delta.y*delta.y;
4910 if (beta >= alpha)
4911 {
4912 delta.x=(double) x-(q+1)->x;
4913 delta.y=(double) y-(q+1)->y;
4914 distance=delta.x*delta.x+delta.y*delta.y;
4915 }
4916 else
4917 {
4918 alpha=MagickSafeReciprocal(alpha);
4919 beta=delta.x*(y-q->y)-delta.y*(x-q->x);
4920 distance=alpha*beta*beta;
4921 }
4922 }
4923 /*
4924 Compute stroke & subpath opacity.
4925 */
4926 beta=0.0;
4927 if (p->ghostline == MagickFalse)
4928 {
4929 alpha=mid+0.5;
4930 if ((*stroke_opacity < 1.0) &&
4931 (distance <= ((alpha+0.25)*(alpha+0.25))))
4932 {
4933 alpha=mid-0.5;
4934 if (distance <= ((alpha+0.25)*(alpha+0.25)))
4935 *stroke_opacity=1.0;
4936 else
4937 {
4938 beta=1.0;
4939 if (fabs(distance-1.0) >= MagickEpsilon)
4940 beta=sqrt((double) distance);
4941 alpha=beta-mid-0.5;
4942 if (*stroke_opacity < ((alpha-0.25)*(alpha-0.25)))
4943 *stroke_opacity=(alpha-0.25)*(alpha-0.25);
4944 }
4945 }
4946 }
4947 if ((fill == MagickFalse) || (distance > 1.0) || (subpath_opacity >= 1.0))
4948 continue;
4949 if (distance <= 0.0)
4950 {
4951 subpath_opacity=1.0;
4952 continue;
4953 }
4954 if (distance > 1.0)
4955 continue;
4956 if (fabs(beta) < MagickEpsilon)
4957 {
4958 beta=1.0;
4959 if (fabs(distance-1.0) >= MagickEpsilon)
4960 beta=sqrt(distance);
4961 }
4962 alpha=beta-1.0;
4963 if (subpath_opacity < (alpha*alpha))
4964 subpath_opacity=alpha*alpha;
4965 }
4966 }
4967 /*
4968 Compute fill opacity.
4969 */
4970 if (fill == MagickFalse)
4971 return(0.0);
4972 if (subpath_opacity >= 1.0)
4973 return(1.0);
4974 /*
4975 Determine winding number.
4976 */
4977 winding_number=0;
4978 p=polygon_info->edges;
4979 for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
4980 {
4981 if ((double) y <= p->bounds.y1)
4982 break;
4983 if (((double) y > p->bounds.y2) || ((double) x <= p->bounds.x1))
4984 continue;
4985 if ((double) x > p->bounds.x2)
4986 {
4987 winding_number+=p->direction != 0 ? 1 : -1;
4988 continue;
4989 }
4990 i=(ssize_t) MagickMax((double) p->highwater,1.0);
4991 for ( ; i < (ssize_t) (p->number_points-1); i++)
4992 if ((double) y <= p->points[i].y)
4993 break;
4994 q=p->points+i-1;
4995 if ((((q+1)->x-q->x)*(y-q->y)) <= (((q+1)->y-q->y)*(x-q->x)))
4996 winding_number+=p->direction != 0 ? 1 : -1;
4997 }
4998 if (fill_rule != NonZeroRule)
4999 {
5000 if ((MagickAbsoluteValue(winding_number) & 0x01) != 0)
5001 return(1.0);
5002 }
5003 else
5004 if (MagickAbsoluteValue(winding_number) != 0)
5005 return(1.0);
5006 return(subpath_opacity);
5007}
5008
5009static MagickBooleanType DrawPolygonPrimitive(Image *image,
5010 const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5011{
5012 typedef struct _ExtentInfo
5013 {
5014 ssize_t
5015 x1,
5016 y1,
5017 x2,
5018 y2;
5019 } ExtentInfo;
5020
5021 CacheView
5022 *image_view;
5023
5024 const char
5025 *artifact;
5026
5027 double
5028 mid;
5029
5030 ExceptionInfo
5031 *exception;
5032
5033 ExtentInfo
5034 poly_extent;
5035
5036 MagickBooleanType
5037 fill,
5038 status;
5039
5040 PolygonInfo
5041 **magick_restrict polygon_info;
5042
5043 EdgeInfo
5044 *p;
5045
5046 SegmentInfo
5047 bounds;
5048
5049 size_t
5050 number_threads = 1;
5051
5052 ssize_t
5053 i,
5054 y;
5055
5056 assert(image != (Image *) NULL);
5057 assert(image->signature == MagickCoreSignature);
5058 assert(draw_info != (DrawInfo *) NULL);
5059 assert(draw_info->signature == MagickCoreSignature);
5060 assert(primitive_info != (PrimitiveInfo *) NULL);
5061 if (IsEventLogging() != MagickFalse)
5062 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
5063 if (primitive_info->coordinates <= 1)
5064 return(MagickTrue);
5065 /*
5066 Compute bounding box.
5067 */
5068 polygon_info=AcquirePolygonTLS(draw_info,primitive_info,&image->exception);
5069 if (polygon_info == (PolygonInfo **) NULL)
5070 return(MagickFalse);
5071 if (draw_info->debug != MagickFalse)
5072 (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-polygon");
5073 fill=(primitive_info->method == FillToBorderMethod) ||
5074 (primitive_info->method == FloodfillMethod) ? MagickTrue : MagickFalse;
5075 mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
5076 bounds=polygon_info[0]->edges[0].bounds;
5077 artifact=GetImageArtifact(image,"draw:render-bounding-rectangles");
5078 if (IsStringTrue(artifact) != MagickFalse)
5079 (void) DrawBoundingRectangles(image,draw_info,polygon_info[0]);
5080 for (i=1; i < (ssize_t) polygon_info[0]->number_edges; i++)
5081 {
5082 p=polygon_info[0]->edges+i;
5083 if (p->bounds.x1 < bounds.x1)
5084 bounds.x1=p->bounds.x1;
5085 if (p->bounds.y1 < bounds.y1)
5086 bounds.y1=p->bounds.y1;
5087 if (p->bounds.x2 > bounds.x2)
5088 bounds.x2=p->bounds.x2;
5089 if (p->bounds.y2 > bounds.y2)
5090 bounds.y2=p->bounds.y2;
5091 }
5092 bounds.x1-=(mid+1.0);
5093 bounds.y1-=(mid+1.0);
5094 bounds.x2+=(mid+1.0);
5095 bounds.y2+=(mid+1.0);
5096 if ((bounds.x1 >= (double) image->columns) ||
5097 (bounds.y1 >= (double) image->rows) ||
5098 (bounds.x2 <= 0.0) || (bounds.y2 <= 0.0))
5099 {
5100 polygon_info=DestroyPolygonTLS(polygon_info);
5101 return(MagickTrue); /* virtual polygon */
5102 }
5103 bounds.x1=bounds.x1 < 0.0 ? 0.0 : bounds.x1 >= (double) image->columns-1.0 ?
5104 (double) image->columns-1.0 : bounds.x1;
5105 bounds.y1=bounds.y1 < 0.0 ? 0.0 : bounds.y1 >= (double) image->rows-1.0 ?
5106 (double) image->rows-1.0 : bounds.y1;
5107 bounds.x2=bounds.x2 < 0.0 ? 0.0 : bounds.x2 >= (double) image->columns-1.0 ?
5108 (double) image->columns-1.0 : bounds.x2;
5109 bounds.y2=bounds.y2 < 0.0 ? 0.0 : bounds.y2 >= (double) image->rows-1.0 ?
5110 (double) image->rows-1.0 : bounds.y2;
5111 poly_extent.x1=CastDoubleToLong(ceil(bounds.x1-0.5));
5112 poly_extent.y1=CastDoubleToLong(ceil(bounds.y1-0.5));
5113 poly_extent.x2=CastDoubleToLong(floor(bounds.x2+0.5));
5114 poly_extent.y2=CastDoubleToLong(floor(bounds.y2+0.5));
5115 number_threads=GetMagickNumberThreads(image,image,poly_extent.y2-
5116 poly_extent.y1+1,1);
5117 status=AcquirePolygonEdgesTLS(polygon_info,number_threads,&image->exception);
5118 if (status == MagickFalse)
5119 {
5120 polygon_info=DestroyPolygonTLS(polygon_info);
5121 return(status);
5122 }
5123 status=MagickTrue;
5124 exception=(&image->exception);
5125 image_view=AcquireAuthenticCacheView(image,exception);
5126 if ((primitive_info->coordinates == 1) ||
5127 (polygon_info[0]->number_edges == 0))
5128 {
5129 /*
5130 Draw point.
5131 */
5132#if defined(MAGICKCORE_OPENMP_SUPPORT)
5133 #pragma omp parallel for schedule(static) shared(status) \
5134 num_threads(number_threads)
5135#endif
5136 for (y=poly_extent.y1; y <= poly_extent.y2; y++)
5137 {
5138 MagickBooleanType
5139 sync;
5140
5141 PixelPacket
5142 *magick_restrict q;
5143
5144 ssize_t
5145 x;
5146
5147 if (status == MagickFalse)
5148 continue;
5149 x=poly_extent.x1;
5150 q=GetCacheViewAuthenticPixels(image_view,x,y,(size_t) (poly_extent.x2-
5151 x+1),1,exception);
5152 if (q == (PixelPacket *) NULL)
5153 {
5154 status=MagickFalse;
5155 continue;
5156 }
5157 for ( ; x <= poly_extent.x2; x++)
5158 {
5159 if ((x == CastDoubleToLong(ceil(primitive_info->point.x-0.5))) &&
5160 (y == CastDoubleToLong(ceil(primitive_info->point.y-0.5))))
5161 (void) GetFillColor(draw_info,x-poly_extent.x1,y-poly_extent.y1,q);
5162 q++;
5163 }
5164 sync=SyncCacheViewAuthenticPixels(image_view,exception);
5165 if (sync == MagickFalse)
5166 status=MagickFalse;
5167 }
5168 image_view=DestroyCacheView(image_view);
5169 polygon_info=DestroyPolygonTLS(polygon_info);
5170 if (draw_info->debug != MagickFalse)
5171 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5172 " end draw-polygon");
5173 return(status);
5174 }
5175 /*
5176 Draw polygon or line.
5177 */
5178 poly_extent.y1=CastDoubleToLong(ceil(bounds.y1-0.5));
5179 poly_extent.y2=CastDoubleToLong(floor(bounds.y2+0.5));
5180#if defined(MAGICKCORE_OPENMP_SUPPORT)
5181 #pragma omp parallel for schedule(static) shared(status) \
5182 num_threads(number_threads)
5183#endif
5184 for (y=poly_extent.y1; y <= poly_extent.y2; y++)
5185 {
5186 const int
5187 id = GetOpenMPThreadId();
5188
5189 PixelPacket
5190 fill_color,
5191 stroke_color;
5192
5193 PixelPacket
5194 *magick_restrict q;
5195
5196 ssize_t
5197 x;
5198
5199 if (status == MagickFalse)
5200 continue;
5201 q=GetCacheViewAuthenticPixels(image_view,poly_extent.x1,y,(size_t)
5202 (poly_extent.x2-poly_extent.x1+1),1,exception);
5203 if (q == (PixelPacket *) NULL)
5204 {
5205 status=MagickFalse;
5206 continue;
5207 }
5208 for (x=poly_extent.x1; x <= poly_extent.x2; x++)
5209 {
5210 double
5211 fill_opacity,
5212 stroke_opacity;
5213
5214 /*
5215 Fill and/or stroke.
5216 */
5217 fill_opacity=GetOpacityPixel(polygon_info[id],mid,fill,
5218 draw_info->fill_rule,x,y,&stroke_opacity);
5219 if (draw_info->stroke_antialias == MagickFalse)
5220 {
5221 fill_opacity=fill_opacity >= AntialiasThreshold ? 1.0 : 0.0;
5222 stroke_opacity=stroke_opacity >= AntialiasThreshold ? 1.0 : 0.0;
5223 }
5224 (void) GetFillColor(draw_info,x-poly_extent.x1,y-poly_extent.y1,
5225 &fill_color);
5226 fill_opacity=(double) ((MagickRealType) QuantumRange-fill_opacity*
5227 ((MagickRealType) QuantumRange-(MagickRealType) fill_color.opacity));
5228 MagickCompositeOver(&fill_color,(MagickRealType) fill_opacity,q,
5229 (MagickRealType) q->opacity,q);
5230 (void) GetStrokeColor(draw_info,x-poly_extent.x1,y-poly_extent.y1,
5231 &stroke_color);
5232 stroke_opacity=(double) ((MagickRealType) QuantumRange-stroke_opacity*
5233 ((MagickRealType) QuantumRange-(MagickRealType) stroke_color.opacity));
5234 MagickCompositeOver(&stroke_color,(MagickRealType) stroke_opacity,q,
5235 (MagickRealType) q->opacity,q);
5236 q++;
5237 }
5238 if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
5239 status=MagickFalse;
5240 }
5241 image_view=DestroyCacheView(image_view);
5242 polygon_info=DestroyPolygonTLS(polygon_info);
5243 if (draw_info->debug != MagickFalse)
5244 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-polygon");
5245 return(status);
5246}
5247␌
5248/*
5249%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5250% %
5251% %
5252% %
5253% D r a w P r i m i t i v e %
5254% %
5255% %
5256% %
5257%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5258%
5259% DrawPrimitive() draws a primitive (line, rectangle, ellipse) on the image.
5260%
5261% The format of the DrawPrimitive method is:
5262%
5263% MagickBooleanType DrawPrimitive(Image *image,const DrawInfo *draw_info,
5264% PrimitiveInfo *primitive_info)
5265%
5266% A description of each parameter follows:
5267%
5268% o image: the image.
5269%
5270% o draw_info: the draw info.
5271%
5272% o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
5273%
5274*/
5275static void LogPrimitiveInfo(const PrimitiveInfo *primitive_info)
5276{
5277 const char
5278 *methods[] =
5279 {
5280 "point",
5281 "replace",
5282 "floodfill",
5283 "filltoborder",
5284 "reset",
5285 "?"
5286 };
5287
5288 PointInfo
5289 p,
5290 q,
5291 point;
5292
5293 ssize_t
5294 i,
5295 x;
5296
5297 ssize_t
5298 coordinates,
5299 y;
5300
5301 x=CastDoubleToLong(ceil(primitive_info->point.x-0.5));
5302 y=CastDoubleToLong(ceil(primitive_info->point.y-0.5));
5303 switch (primitive_info->primitive)
5304 {
5305 case PointPrimitive:
5306 {
5307 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5308 "PointPrimitive %.20g,%.20g %s",(double) x,(double) y,
5309 methods[primitive_info->method]);
5310 return;
5311 }
5312 case ColorPrimitive:
5313 {
5314 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5315 "ColorPrimitive %.20g,%.20g %s",(double) x,(double) y,
5316 methods[primitive_info->method]);
5317 return;
5318 }
5319 case MattePrimitive:
5320 {
5321 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5322 "MattePrimitive %.20g,%.20g %s",(double) x,(double) y,
5323 methods[primitive_info->method]);
5324 return;
5325 }
5326 case TextPrimitive:
5327 {
5328 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5329 "TextPrimitive %.20g,%.20g",(double) x,(double) y);
5330 return;
5331 }
5332 case ImagePrimitive:
5333 {
5334 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5335 "ImagePrimitive %.20g,%.20g",(double) x,(double) y);
5336 return;
5337 }
5338 default:
5339 break;
5340 }
5341 coordinates=0;
5342 p=primitive_info[0].point;
5343 q.x=(-1.0);
5344 q.y=(-1.0);
5345 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
5346 {
5347 point=primitive_info[i].point;
5348 if (coordinates <= 0)
5349 {
5350 coordinates=(ssize_t) primitive_info[i].coordinates;
5351 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5352 " begin open (%.20g)",(double) coordinates);
5353 p=point;
5354 }
5355 point=primitive_info[i].point;
5356 if ((fabs(q.x-point.x) >= MagickEpsilon) ||
5357 (fabs(q.y-point.y) >= MagickEpsilon))
5358 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5359 " %.20g: %.18g,%.18g",(double) coordinates,point.x,point.y);
5360 else
5361 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5362 " %.20g: %g %g (duplicate)",(double) coordinates,point.x,point.y);
5363 q=point;
5364 coordinates--;
5365 if (coordinates > 0)
5366 continue;
5367 if ((fabs(p.x-point.x) >= MagickEpsilon) ||
5368 (fabs(p.y-point.y) >= MagickEpsilon))
5369 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end last (%.20g)",
5370 (double) coordinates);
5371 else
5372 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end open (%.20g)",
5373 (double) coordinates);
5374 }
5375}
5376
5377MagickExport MagickBooleanType DrawPrimitive(Image *image,
5378 const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5379{
5380 CacheView
5381 *image_view;
5382
5383 ExceptionInfo
5384 *exception;
5385
5386 MagickStatusType
5387 status;
5388
5389 ssize_t
5390 i,
5391 x;
5392
5393 ssize_t
5394 y;
5395
5396 if (draw_info->debug != MagickFalse)
5397 {
5398 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5399 " begin draw-primitive");
5400 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5401 " affine: %g,%g,%g,%g,%g,%g",draw_info->affine.sx,
5402 draw_info->affine.rx,draw_info->affine.ry,draw_info->affine.sy,
5403 draw_info->affine.tx,draw_info->affine.ty);
5404 }
5405 exception=(&image->exception);
5406 status=MagickTrue;
5407 if ((IsGrayColorspace(image->colorspace) != MagickFalse) &&
5408 ((IsPixelGray(&draw_info->fill) == MagickFalse) ||
5409 (IsPixelGray(&draw_info->stroke) == MagickFalse)))
5410 status=SetImageColorspace(image,sRGBColorspace);
5411 if (draw_info->compliance == SVGCompliance)
5412 {
5413 status&=SetImageClipMask(image,draw_info->clipping_mask);
5414 status&=SetImageMask(image,draw_info->composite_mask);
5415 }
5416 x=CastDoubleToLong(ceil(primitive_info->point.x-0.5));
5417 y=CastDoubleToLong(ceil(primitive_info->point.y-0.5));
5418 image_view=AcquireAuthenticCacheView(image,exception);
5419 switch (primitive_info->primitive)
5420 {
5421 case ColorPrimitive:
5422 {
5423 switch (primitive_info->method)
5424 {
5425 case PointMethod:
5426 default:
5427 {
5428 PixelPacket
5429 *q;
5430
5431 q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
5432 if (q == (PixelPacket *) NULL)
5433 break;
5434 (void) GetFillColor(draw_info,x,y,q);
5435 status&=SyncCacheViewAuthenticPixels(image_view,exception);
5436 break;
5437 }
5438 case ReplaceMethod:
5439 {
5440 PixelPacket
5441 target;
5442
5443 status&=GetOneCacheViewVirtualPixel(image_view,x,y,&target,exception);
5444 for (y=0; y < (ssize_t) image->rows; y++)
5445 {
5446 PixelPacket
5447 *magick_restrict q;
5448
5449 q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
5450 exception);
5451 if (q == (PixelPacket *) NULL)
5452 break;
5453 for (x=0; x < (ssize_t) image->columns; x++)
5454 {
5455 if (IsColorSimilar(image,q,&target) == MagickFalse)
5456 {
5457 q++;
5458 continue;
5459 }
5460 (void) GetFillColor(draw_info,x,y,q);
5461 q++;
5462 }
5463 status&=SyncCacheViewAuthenticPixels(image_view,exception);
5464 if (status == MagickFalse)
5465 break;
5466 }
5467 break;
5468 }
5469 case FloodfillMethod:
5470 case FillToBorderMethod:
5471 {
5472 MagickPixelPacket
5473 target;
5474
5475 status&=GetOneVirtualMagickPixel(image,x,y,&target,exception);
5476 if (primitive_info->method == FillToBorderMethod)
5477 {
5478 target.red=(MagickRealType) draw_info->border_color.red;
5479 target.green=(MagickRealType) draw_info->border_color.green;
5480 target.blue=(MagickRealType) draw_info->border_color.blue;
5481 }
5482 status&=FloodfillPaintImage(image,DefaultChannels,draw_info,&target,x,
5483 y,primitive_info->method == FloodfillMethod ? MagickFalse :
5484 MagickTrue);
5485 break;
5486 }
5487 case ResetMethod:
5488 {
5489 for (y=0; y < (ssize_t) image->rows; y++)
5490 {
5491 PixelPacket
5492 *magick_restrict q;
5493
5494 ssize_t
5495 x;
5496
5497 q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
5498 exception);
5499 if (q == (PixelPacket *) NULL)
5500 break;
5501 for (x=0; x < (ssize_t) image->columns; x++)
5502 {
5503 (void) GetFillColor(draw_info,x,y,q);
5504 q++;
5505 }
5506 status&=SyncCacheViewAuthenticPixels(image_view,exception);
5507 if (status == MagickFalse)
5508 break;
5509 }
5510 break;
5511 }
5512 }
5513 break;
5514 }
5515 case MattePrimitive:
5516 {
5517 if (image->matte == MagickFalse)
5518 status&=SetImageAlphaChannel(image,OpaqueAlphaChannel);
5519 switch (primitive_info->method)
5520 {
5521 case PointMethod:
5522 default:
5523 {
5524 PixelPacket
5525 pixel;
5526
5527 PixelPacket
5528 *q;
5529
5530 q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
5531 if (q == (PixelPacket *) NULL)
5532 break;
5533 (void) GetFillColor(draw_info,x,y,&pixel);
5534 SetPixelOpacity(q,pixel.opacity);
5535 status&=SyncCacheViewAuthenticPixels(image_view,exception);
5536 break;
5537 }
5538 case ReplaceMethod:
5539 {
5540 PixelPacket
5541 pixel,
5542 target;
5543
5544 status&=GetOneCacheViewVirtualPixel(image_view,x,y,&target,exception);
5545 for (y=0; y < (ssize_t) image->rows; y++)
5546 {
5547 PixelPacket
5548 *magick_restrict q;
5549
5550 ssize_t
5551 x;
5552
5553 q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
5554 exception);
5555 if (q == (PixelPacket *) NULL)
5556 break;
5557 for (x=0; x < (ssize_t) image->columns; x++)
5558 {
5559 if (IsColorSimilar(image,q,&target) == MagickFalse)
5560 {
5561 q++;
5562 continue;
5563 }
5564 (void) GetFillColor(draw_info,x,y,&pixel);
5565 SetPixelOpacity(q,pixel.opacity);
5566 q++;
5567 }
5568 status&=SyncCacheViewAuthenticPixels(image_view,exception);
5569 if (status == MagickFalse)
5570 break;
5571 }
5572 break;
5573 }
5574 case FloodfillMethod:
5575 case FillToBorderMethod:
5576 {
5577 MagickPixelPacket
5578 target;
5579
5580 status&=GetOneVirtualMagickPixel(image,x,y,&target,exception);
5581 if (primitive_info->method == FillToBorderMethod)
5582 {
5583 target.red=(MagickRealType) draw_info->border_color.red;
5584 target.green=(MagickRealType) draw_info->border_color.green;
5585 target.blue=(MagickRealType) draw_info->border_color.blue;
5586 }
5587 status&=FloodfillPaintImage(image,OpacityChannel,draw_info,&target,x,
5588 y,primitive_info->method == FloodfillMethod ? MagickFalse :
5589 MagickTrue);
5590 break;
5591 }
5592 case ResetMethod:
5593 {
5594 PixelPacket
5595 pixel;
5596
5597 for (y=0; y < (ssize_t) image->rows; y++)
5598 {
5599 PixelPacket
5600 *magick_restrict q;
5601
5602 ssize_t
5603 x;
5604
5605 q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
5606 exception);
5607 if (q == (PixelPacket *) NULL)
5608 break;
5609 for (x=0; x < (ssize_t) image->columns; x++)
5610 {
5611 (void) GetFillColor(draw_info,x,y,&pixel);
5612 SetPixelOpacity(q,pixel.opacity);
5613 q++;
5614 }
5615 status&=SyncCacheViewAuthenticPixels(image_view,exception);
5616 if (status == MagickFalse)
5617 break;
5618 }
5619 break;
5620 }
5621 }
5622 break;
5623 }
5624 case ImagePrimitive:
5625 {
5626 AffineMatrix
5627 affine;
5628
5629 char
5630 composite_geometry[MaxTextExtent];
5631
5632 Image
5633 *composite_image,
5634 *composite_images;
5635
5636 ImageInfo
5637 *clone_info;
5638
5639 RectangleInfo
5640 geometry;
5641
5642 ssize_t
5643 x1,
5644 y1;
5645
5646 if (primitive_info->text == (char *) NULL)
5647 break;
5648 clone_info=AcquireImageInfo();
5649 composite_images=(Image *) NULL;
5650 if (LocaleNCompare(primitive_info->text,"data:",5) == 0)
5651 composite_images=ReadInlineImage(clone_info,primitive_info->text,
5652 &image->exception);
5653 else
5654 if (*primitive_info->text != '\0')
5655 {
5656 /*
5657 Read composite image.
5658 */
5659 (void) CopyMagickString(clone_info->filename,primitive_info->text,
5660 MagickPathExtent);
5661 (void) SetImageInfo(clone_info,1,exception);
5662 (void) CopyMagickString(clone_info->filename,primitive_info->text,
5663 MagickPathExtent);
5664 if (clone_info->size != (char *) NULL)
5665 clone_info->size=DestroyString(clone_info->size);
5666 if (clone_info->extract != (char *) NULL)
5667 clone_info->extract=DestroyString(clone_info->extract);
5668 composite_images=StrictReadImage(clone_info,exception);
5669 }
5670 clone_info=DestroyImageInfo(clone_info);
5671 if (composite_images == (Image *) NULL)
5672 {
5673 status=0;
5674 break;
5675 }
5676 composite_image=RemoveFirstImageFromList(&composite_images);
5677 composite_images=DestroyImageList(composite_images);
5678 (void) SetImageProgressMonitor(composite_image,(MagickProgressMonitor)
5679 NULL,(void *) NULL);
5680 x1=CastDoubleToLong(ceil(primitive_info[1].point.x-0.5));
5681 y1=CastDoubleToLong(ceil(primitive_info[1].point.y-0.5));
5682 if (((x1 != 0L) && (x1 != (ssize_t) composite_image->columns)) ||
5683 ((y1 != 0L) && (y1 != (ssize_t) composite_image->rows)))
5684 {
5685 char
5686 geometry[MaxTextExtent];
5687
5688 /*
5689 Resize image.
5690 */
5691 (void) FormatLocaleString(geometry,MaxTextExtent,"%gx%g!",
5692 primitive_info[1].point.x,primitive_info[1].point.y);
5693 composite_image->filter=image->filter;
5694 status&=TransformImage(&composite_image,(char *) NULL,geometry);
5695 }
5696 if (composite_image->matte == MagickFalse)
5697 status&=SetImageAlphaChannel(composite_image,OpaqueAlphaChannel);
5698 if (draw_info->opacity != OpaqueOpacity)
5699 status&=SetImageOpacity(composite_image,draw_info->opacity);
5700 SetGeometry(image,&geometry);
5701 image->gravity=draw_info->gravity;
5702 geometry.x=x;
5703 geometry.y=y;
5704 (void) FormatLocaleString(composite_geometry,MaxTextExtent,
5705 "%.20gx%.20g%+.20g%+.20g",(double) composite_image->columns,(double)
5706 composite_image->rows,(double) geometry.x,(double) geometry.y);
5707 (void) ParseGravityGeometry(image,composite_geometry,&geometry,
5708 &image->exception);
5709 affine=draw_info->affine;
5710 affine.tx=(double) geometry.x;
5711 affine.ty=(double) geometry.y;
5712 composite_image->interpolate=image->interpolate;
5713 if ((draw_info->compose == OverCompositeOp) ||
5714 (draw_info->compose == SrcOverCompositeOp))
5715 status&=DrawAffineImage(image,composite_image,&affine);
5716 else
5717 status&=CompositeImage(image,draw_info->compose,composite_image,
5718 geometry.x,geometry.y);
5719 composite_image=DestroyImage(composite_image);
5720 break;
5721 }
5722 case PointPrimitive:
5723 {
5724 PixelPacket
5725 fill_color;
5726
5727 PixelPacket
5728 *q;
5729
5730 if ((y < 0) || (y >= (ssize_t) image->rows))
5731 break;
5732 if ((x < 0) || (x >= (ssize_t) image->columns))
5733 break;
5734 q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
5735 if (q == (PixelPacket *) NULL)
5736 break;
5737 (void) GetFillColor(draw_info,x,y,&fill_color);
5738 MagickCompositeOver(&fill_color,(MagickRealType) fill_color.opacity,q,
5739 (MagickRealType) q->opacity,q);
5740 status&=SyncCacheViewAuthenticPixels(image_view,exception);
5741 break;
5742 }
5743 case TextPrimitive:
5744 {
5745 char
5746 geometry[MaxTextExtent];
5747
5748 DrawInfo
5749 *clone_info;
5750
5751 if (primitive_info->text == (char *) NULL)
5752 break;
5753 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
5754 (void) CloneString(&clone_info->text,primitive_info->text);
5755 (void) FormatLocaleString(geometry,MaxTextExtent,"%+f%+f",
5756 primitive_info->point.x,primitive_info->point.y);
5757 (void) CloneString(&clone_info->geometry,geometry);
5758 status&=AnnotateImage(image,clone_info);
5759 clone_info=DestroyDrawInfo(clone_info);
5760 break;
5761 }
5762 default:
5763 {
5764 double
5765 mid,
5766 scale;
5767
5768 DrawInfo
5769 *clone_info;
5770
5771 if (IsEventLogging() != MagickFalse)
5772 LogPrimitiveInfo(primitive_info);
5773 scale=ExpandAffine(&draw_info->affine);
5774 if ((draw_info->dash_pattern != (double *) NULL) &&
5775 (fabs(draw_info->dash_pattern[0]) >= MagickEpsilon) &&
5776 (fabs(scale*draw_info->stroke_width) >= MagickEpsilon) &&
5777 (draw_info->stroke.opacity != (Quantum) TransparentOpacity))
5778 {
5779 /*
5780 Draw dash polygon.
5781 */
5782 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
5783 clone_info->stroke_width=0.0;
5784 clone_info->stroke.opacity=(Quantum) TransparentOpacity;
5785 status&=DrawPolygonPrimitive(image,clone_info,primitive_info);
5786 clone_info=DestroyDrawInfo(clone_info);
5787 if (status != MagickFalse)
5788 status&=DrawDashPolygon(draw_info,primitive_info,image);
5789 break;
5790 }
5791 mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
5792 if ((mid > 1.0) &&
5793 ((draw_info->stroke.opacity != (Quantum) TransparentOpacity) ||
5794 (draw_info->stroke_pattern != (Image *) NULL)))
5795 {
5796 double
5797 x,
5798 y;
5799
5800 MagickBooleanType
5801 closed_path;
5802
5803 /*
5804 Draw strokes while respecting line cap/join attributes.
5805 */
5806 closed_path=primitive_info[0].closed_subpath;
5807 i=(ssize_t) primitive_info[0].coordinates;
5808 x=fabs(primitive_info[i-1].point.x-primitive_info[0].point.x);
5809 y=fabs(primitive_info[i-1].point.y-primitive_info[0].point.y);
5810 if ((x < MagickEpsilon) && (y < MagickEpsilon))
5811 closed_path=MagickTrue;
5812 if ((((draw_info->linecap == RoundCap) ||
5813 (closed_path != MagickFalse)) &&
5814 (draw_info->linejoin == RoundJoin)) ||
5815 (primitive_info[i].primitive != UndefinedPrimitive))
5816 {
5817 status&=DrawPolygonPrimitive(image,draw_info,primitive_info);
5818 break;
5819 }
5820 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
5821 clone_info->stroke_width=0.0;
5822 clone_info->stroke.opacity=(Quantum) TransparentOpacity;
5823 status&=DrawPolygonPrimitive(image,clone_info,primitive_info);
5824 clone_info=DestroyDrawInfo(clone_info);
5825 if (status != MagickFalse)
5826 status&=DrawStrokePolygon(image,draw_info,primitive_info);
5827 break;
5828 }
5829 status&=DrawPolygonPrimitive(image,draw_info,primitive_info);
5830 break;
5831 }
5832 }
5833 image_view=DestroyCacheView(image_view);
5834 if (draw_info->compliance == SVGCompliance)
5835 {
5836 status&=SetImageClipMask(image,(Image *) NULL);
5837 status&=SetImageMask(image,(Image *) NULL);
5838 }
5839 if (draw_info->debug != MagickFalse)
5840 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-primitive");
5841 return(status != 0 ? MagickTrue : MagickFalse);
5842}
5843␌
5844/*
5845%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5846% %
5847% %
5848% %
5849+ D r a w S t r o k e P o l y g o n %
5850% %
5851% %
5852% %
5853%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5854%
5855% DrawStrokePolygon() draws a stroked polygon (line, rectangle, ellipse) on
5856% the image while respecting the line cap and join attributes.
5857%
5858% The format of the DrawStrokePolygon method is:
5859%
5860% MagickBooleanType DrawStrokePolygon(Image *image,
5861% const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5862%
5863% A description of each parameter follows:
5864%
5865% o image: the image.
5866%
5867% o draw_info: the draw info.
5868%
5869% o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
5870%
5871%
5872*/
5873
5874static MagickBooleanType DrawRoundLinecap(Image *image,
5875 const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5876{
5877 PrimitiveInfo
5878 linecap[5];
5879
5880 ssize_t
5881 i;
5882
5883 if (primitive_info->coordinates < 1)
5884 return(MagickFalse);
5885 for (i=0; i < 4; i++)
5886 linecap[i]=(*primitive_info);
5887 linecap[0].coordinates=4;
5888 linecap[1].point.x+=2.0*MagickEpsilon;
5889 linecap[2].point.x+=2.0*MagickEpsilon;
5890 linecap[2].point.y+=2.0*MagickEpsilon;
5891 linecap[3].point.y+=2.0*MagickEpsilon;
5892 linecap[4].primitive=UndefinedPrimitive;
5893 return(DrawPolygonPrimitive(image,draw_info,linecap));
5894}
5895
5896static MagickBooleanType DrawStrokePolygon(Image *image,
5897 const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5898{
5899 DrawInfo
5900 *clone_info;
5901
5902 MagickBooleanType
5903 closed_path;
5904
5905 MagickStatusType
5906 status;
5907
5908 PrimitiveInfo
5909 *stroke_polygon;
5910
5911 const PrimitiveInfo
5912 *p,
5913 *q;
5914
5915 /*
5916 Draw stroked polygon.
5917 */
5918 if (draw_info->debug != MagickFalse)
5919 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5920 " begin draw-stroke-polygon");
5921 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
5922 clone_info->fill=draw_info->stroke;
5923 if (clone_info->fill_pattern != (Image *) NULL)
5924 clone_info->fill_pattern=DestroyImage(clone_info->fill_pattern);
5925 if (clone_info->stroke_pattern != (Image *) NULL)
5926 clone_info->fill_pattern=CloneImage(clone_info->stroke_pattern,0,0,
5927 MagickTrue,&clone_info->stroke_pattern->exception);
5928 clone_info->stroke.opacity=(Quantum) TransparentOpacity;
5929 clone_info->stroke_width=0.0;
5930 clone_info->fill_rule=NonZeroRule;
5931 status=MagickTrue;
5932 for (p=primitive_info; p->primitive != UndefinedPrimitive; p+=(ptrdiff_t) p->coordinates)
5933 {
5934 if (p->coordinates == 1)
5935 continue;
5936 stroke_polygon=TraceStrokePolygon(draw_info,p,&image->exception);
5937 if (stroke_polygon == (PrimitiveInfo *) NULL)
5938 {
5939 status=0;
5940 break;
5941 }
5942 status&=DrawPolygonPrimitive(image,clone_info,stroke_polygon);
5943 stroke_polygon=(PrimitiveInfo *) RelinquishMagickMemory(stroke_polygon);
5944 if (status == 0)
5945 break;
5946 q=p+p->coordinates-1;
5947 closed_path=p->closed_subpath;
5948 if ((draw_info->linecap == RoundCap) && (closed_path == MagickFalse))
5949 {
5950 status&=DrawRoundLinecap(image,draw_info,p);
5951 status&=DrawRoundLinecap(image,draw_info,q);
5952 }
5953 }
5954 clone_info=DestroyDrawInfo(clone_info);
5955 if (draw_info->debug != MagickFalse)
5956 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5957 " end draw-stroke-polygon");
5958 return(status != 0 ? MagickTrue : MagickFalse);
5959}
5960␌
5961/*
5962%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5963% %
5964% %
5965% %
5966% G e t A f f i n e M a t r i x %
5967% %
5968% %
5969% %
5970%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5971%
5972% GetAffineMatrix() returns an AffineMatrix initialized to the identity
5973% matrix.
5974%
5975% The format of the GetAffineMatrix method is:
5976%
5977% void GetAffineMatrix(AffineMatrix *affine_matrix)
5978%
5979% A description of each parameter follows:
5980%
5981% o affine_matrix: the affine matrix.
5982%
5983*/
5984MagickExport void GetAffineMatrix(AffineMatrix *affine_matrix)
5985{
5986 assert(affine_matrix != (AffineMatrix *) NULL);
5987 if (IsEventLogging() != MagickFalse)
5988 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
5989 (void) memset(affine_matrix,0,sizeof(*affine_matrix));
5990 affine_matrix->sx=1.0;
5991 affine_matrix->sy=1.0;
5992}
5993␌
5994/*
5995%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5996% %
5997% %
5998% %
5999+ G e t D r a w I n f o %
6000% %
6001% %
6002% %
6003%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6004%
6005% GetDrawInfo() initializes draw_info to default values from image_info.
6006%
6007% The format of the GetDrawInfo method is:
6008%
6009% void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
6010%
6011% A description of each parameter follows:
6012%
6013% o image_info: the image info..
6014%
6015% o draw_info: the draw info.
6016%
6017*/
6018MagickExport void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
6019{
6020 char
6021 *next_token;
6022
6023 const char
6024 *option;
6025
6026 ExceptionInfo
6027 *exception;
6028
6029 /*
6030 Initialize draw attributes.
6031 */
6032 assert(draw_info != (DrawInfo *) NULL);
6033 if (IsEventLogging() != MagickFalse)
6034 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
6035 (void) memset(draw_info,0,sizeof(*draw_info));
6036 draw_info->image_info=CloneImageInfo(image_info);
6037 GetAffineMatrix(&draw_info->affine);
6038 exception=AcquireExceptionInfo();
6039 (void) QueryColorDatabase("#000F",&draw_info->fill,exception);
6040 (void) QueryColorDatabase("#FFF0",&draw_info->stroke,exception);
6041 draw_info->stroke_antialias=draw_info->image_info->antialias;
6042 draw_info->stroke_width=1.0;
6043 draw_info->fill_rule=EvenOddRule;
6044 draw_info->opacity=OpaqueOpacity;
6045 draw_info->fill_opacity=OpaqueOpacity;
6046 draw_info->stroke_opacity=OpaqueOpacity;
6047 draw_info->linecap=ButtCap;
6048 draw_info->linejoin=MiterJoin;
6049 draw_info->miterlimit=10;
6050 draw_info->decorate=NoDecoration;
6051 if (draw_info->image_info->font != (char *) NULL)
6052 draw_info->font=AcquireString(draw_info->image_info->font);
6053 if (draw_info->image_info->density != (char *) NULL)
6054 draw_info->density=AcquireString(draw_info->image_info->density);
6055 draw_info->text_antialias=draw_info->image_info->antialias;
6056 draw_info->pointsize=12.0;
6057 if (fabs(draw_info->image_info->pointsize) >= MagickEpsilon)
6058 draw_info->pointsize=draw_info->image_info->pointsize;
6059 draw_info->undercolor.opacity=(Quantum) TransparentOpacity;
6060 draw_info->border_color=draw_info->image_info->border_color;
6061 draw_info->compose=OverCompositeOp;
6062 if (draw_info->image_info->server_name != (char *) NULL)
6063 draw_info->server_name=AcquireString(draw_info->image_info->server_name);
6064 draw_info->render=MagickTrue;
6065 draw_info->clip_path=MagickFalse;
6066 draw_info->debug=(GetLogEventMask() & (DrawEvent | AnnotateEvent)) != 0 ?
6067 MagickTrue : MagickFalse;
6068 option=GetImageOption(draw_info->image_info,"direction");
6069 if (option != (const char *) NULL)
6070 draw_info->direction=(DirectionType) ParseCommandOption(
6071 MagickDirectionOptions,MagickFalse,option);
6072 else
6073 draw_info->direction=UndefinedDirection;
6074 option=GetImageOption(draw_info->image_info,"encoding");
6075 if (option != (const char *) NULL)
6076 (void) CloneString(&draw_info->encoding,option);
6077 option=GetImageOption(draw_info->image_info,"family");
6078 if (option != (const char *) NULL)
6079 (void) CloneString(&draw_info->family,option);
6080 option=GetImageOption(draw_info->image_info,"fill");
6081 if (option != (const char *) NULL)
6082 (void) QueryColorDatabase(option,&draw_info->fill,exception);
6083 option=GetImageOption(draw_info->image_info,"gravity");
6084 if (option != (const char *) NULL)
6085 draw_info->gravity=(GravityType) ParseCommandOption(MagickGravityOptions,
6086 MagickFalse,option);
6087 option=GetImageOption(draw_info->image_info,"interline-spacing");
6088 if (option != (const char *) NULL)
6089 draw_info->interline_spacing=GetDrawValue(option,&next_token);
6090 option=GetImageOption(draw_info->image_info,"interword-spacing");
6091 if (option != (const char *) NULL)
6092 draw_info->interword_spacing=GetDrawValue(option,&next_token);
6093 option=GetImageOption(draw_info->image_info,"kerning");
6094 if (option != (const char *) NULL)
6095 draw_info->kerning=GetDrawValue(option,&next_token);
6096 option=GetImageOption(draw_info->image_info,"stroke");
6097 if (option != (const char *) NULL)
6098 (void) QueryColorDatabase(option,&draw_info->stroke,exception);
6099 option=GetImageOption(draw_info->image_info,"strokewidth");
6100 if (option != (const char *) NULL)
6101 draw_info->stroke_width=GetDrawValue(option,&next_token);
6102 option=GetImageOption(draw_info->image_info,"style");
6103 if (option != (const char *) NULL)
6104 draw_info->style=(StyleType) ParseCommandOption(MagickStyleOptions,
6105 MagickFalse,option);
6106 option=GetImageOption(draw_info->image_info,"undercolor");
6107 if (option != (const char *) NULL)
6108 (void) QueryColorDatabase(option,&draw_info->undercolor,exception);
6109 option=GetImageOption(draw_info->image_info,"weight");
6110 if (option != (const char *) NULL)
6111 {
6112 ssize_t
6113 weight;
6114
6115 weight=ParseCommandOption(MagickWeightOptions,MagickFalse,option);
6116 if (weight == -1)
6117 weight=(ssize_t) StringToUnsignedLong(option);
6118 draw_info->weight=(size_t) weight;
6119 }
6120 exception=DestroyExceptionInfo(exception);
6121 draw_info->signature=MagickCoreSignature;
6122}
6123␌
6124/*
6125%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6126% %
6127% %
6128% %
6129+ P e r m u t a t e %
6130% %
6131% %
6132% %
6133%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6134%
6135% Permutate() returns the permutation of the (n,k).
6136%
6137% The format of the Permutate method is:
6138%
6139% void Permutate(ssize_t n,ssize_t k)
6140%
6141% A description of each parameter follows:
6142%
6143% o n:
6144%
6145% o k:
6146%
6147%
6148*/
6149static inline double Permutate(const ssize_t n,const ssize_t k)
6150{
6151 double
6152 r;
6153
6154 ssize_t
6155 i;
6156
6157 r=1.0;
6158 for (i=k+1; i <= n; i++)
6159 r*=i;
6160 for (i=1; i <= (n-k); i++)
6161 r/=i;
6162 return(r);
6163}
6164␌
6165/*
6166%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6167% %
6168% %
6169% %
6170+ T r a c e P r i m i t i v e %
6171% %
6172% %
6173% %
6174%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6175%
6176% TracePrimitive is a collection of methods for generating graphic
6177% primitives such as arcs, ellipses, paths, etc.
6178%
6179*/
6180
6181static MagickBooleanType TraceArc(MVGInfo *mvg_info,const PointInfo start,
6182 const PointInfo end,const PointInfo degrees)
6183{
6184 PointInfo
6185 center,
6186 radius;
6187
6188 center.x=0.5*(end.x+start.x);
6189 center.y=0.5*(end.y+start.y);
6190 radius.x=fabs(center.x-start.x);
6191 radius.y=fabs(center.y-start.y);
6192 return(TraceEllipse(mvg_info,center,radius,degrees));
6193}
6194
6195static MagickBooleanType TraceArcPath(MVGInfo *mvg_info,const PointInfo start,
6196 const PointInfo end,const PointInfo arc,const double angle,
6197 const MagickBooleanType large_arc,const MagickBooleanType sweep)
6198{
6199 double
6200 alpha,
6201 beta,
6202 delta,
6203 factor,
6204 gamma,
6205 theta;
6206
6207 MagickStatusType
6208 status;
6209
6210 PointInfo
6211 center,
6212 points[3],
6213 radii;
6214
6215 double
6216 cosine,
6217 sine;
6218
6219 PrimitiveInfo
6220 *primitive_info;
6221
6222 PrimitiveInfo
6223 *p;
6224
6225 ssize_t
6226 i;
6227
6228 size_t
6229 arc_segments;
6230
6231 ssize_t
6232 offset;
6233
6234 offset=mvg_info->offset;
6235 primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6236 primitive_info->coordinates=0;
6237 if ((fabs(start.x-end.x) < MagickEpsilon) &&
6238 (fabs(start.y-end.y) < MagickEpsilon))
6239 return(TracePoint(primitive_info,end));
6240 radii.x=fabs(arc.x);
6241 radii.y=fabs(arc.y);
6242 if ((radii.x < MagickEpsilon) || (radii.y < MagickEpsilon))
6243 return(TraceLine(primitive_info,start,end));
6244 cosine=cos(DegreesToRadians(fmod((double) angle,360.0)));
6245 sine=sin(DegreesToRadians(fmod((double) angle,360.0)));
6246 center.x=(double) (cosine*(end.x-start.x)/2+sine*(end.y-start.y)/2);
6247 center.y=(double) (cosine*(end.y-start.y)/2-sine*(end.x-start.x)/2);
6248 delta=(center.x*center.x)/(radii.x*radii.x)+(center.y*center.y)/
6249 (radii.y*radii.y);
6250 if (delta < MagickEpsilon)
6251 return(TraceLine(primitive_info,start,end));
6252 if (delta > 1.0)
6253 {
6254 radii.x*=sqrt((double) delta);
6255 radii.y*=sqrt((double) delta);
6256 }
6257 points[0].x=(double) (cosine*start.x/radii.x+sine*start.y/radii.x);
6258 points[0].y=(double) (cosine*start.y/radii.y-sine*start.x/radii.y);
6259 points[1].x=(double) (cosine*end.x/radii.x+sine*end.y/radii.x);
6260 points[1].y=(double) (cosine*end.y/radii.y-sine*end.x/radii.y);
6261 alpha=points[1].x-points[0].x;
6262 beta=points[1].y-points[0].y;
6263 if (fabs(alpha*alpha+beta*beta) < MagickEpsilon)
6264 return(TraceLine(primitive_info,start,end));
6265 factor=MagickSafeReciprocal(alpha*alpha+beta*beta)-0.25;
6266 if (factor <= 0.0)
6267 factor=0.0;
6268 else
6269 {
6270 factor=sqrt((double) factor);
6271 if (sweep == large_arc)
6272 factor=(-factor);
6273 }
6274 center.x=(double) ((points[0].x+points[1].x)/2-factor*beta);
6275 center.y=(double) ((points[0].y+points[1].y)/2+factor*alpha);
6276 alpha=atan2(points[0].y-center.y,points[0].x-center.x);
6277 theta=atan2(points[1].y-center.y,points[1].x-center.x)-alpha;
6278 if ((theta < 0.0) && (sweep != MagickFalse))
6279 theta+=2.0*MagickPI;
6280 else
6281 if ((theta > 0.0) && (sweep == MagickFalse))
6282 theta-=2.0*MagickPI;
6283 arc_segments=(size_t) CastDoubleToLong(ceil(fabs((double) (theta/(0.5*
6284 MagickPI+MagickEpsilon)))));
6285 p=primitive_info;
6286 status=MagickTrue;
6287 for (i=0; i < (ssize_t) arc_segments; i++)
6288 {
6289 beta=0.5*((alpha+(i+1)*theta/arc_segments)-(alpha+i*theta/arc_segments));
6290 gamma=(8.0/3.0)*sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))*
6291 sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))/
6292 sin(fmod((double) beta,DegreesToRadians(360.0)));
6293 points[0].x=(double) (center.x+cos(fmod((double) (alpha+(double) i*theta/
6294 arc_segments),DegreesToRadians(360.0)))-gamma*sin(fmod((double) (alpha+
6295 (double) i*theta/arc_segments),DegreesToRadians(360.0))));
6296 points[0].y=(double) (center.y+sin(fmod((double) (alpha+(double) i*theta/
6297 arc_segments),DegreesToRadians(360.0)))+gamma*cos(fmod((double) (alpha+
6298 (double) i*theta/arc_segments),DegreesToRadians(360.0))));
6299 points[2].x=(double) (center.x+cos(fmod((double) (alpha+(double) (i+1)*
6300 theta/arc_segments),DegreesToRadians(360.0))));
6301 points[2].y=(double) (center.y+sin(fmod((double) (alpha+(double) (i+1)*
6302 theta/arc_segments),DegreesToRadians(360.0))));
6303 points[1].x=(double) (points[2].x+gamma*sin(fmod((double) (alpha+(double)
6304 (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
6305 points[1].y=(double) (points[2].y-gamma*cos(fmod((double) (alpha+(double)
6306 (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
6307 p->point.x=(p == primitive_info) ? start.x : (p-1)->point.x;
6308 p->point.y=(p == primitive_info) ? start.y : (p-1)->point.y;
6309 (p+1)->point.x=(double) (cosine*radii.x*points[0].x-sine*radii.y*
6310 points[0].y);
6311 (p+1)->point.y=(double) (sine*radii.x*points[0].x+cosine*radii.y*
6312 points[0].y);
6313 (p+2)->point.x=(double) (cosine*radii.x*points[1].x-sine*radii.y*
6314 points[1].y);
6315 (p+2)->point.y=(double) (sine*radii.x*points[1].x+cosine*radii.y*
6316 points[1].y);
6317 (p+3)->point.x=(double) (cosine*radii.x*points[2].x-sine*radii.y*
6318 points[2].y);
6319 (p+3)->point.y=(double) (sine*radii.x*points[2].x+cosine*radii.y*
6320 points[2].y);
6321 if (i == (ssize_t) (arc_segments-1))
6322 (p+3)->point=end;
6323 status&=TraceBezier(mvg_info,4);
6324 if (status == 0)
6325 break;
6326 p=(*mvg_info->primitive_info)+(ptrdiff_t) mvg_info->offset;
6327 mvg_info->offset+=p->coordinates;
6328 p+=(ptrdiff_t) p->coordinates;
6329 }
6330 if (status == 0)
6331 return(MagickFalse);
6332 mvg_info->offset=offset;
6333 primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6334 primitive_info->coordinates=(size_t) (p-primitive_info);
6335 primitive_info->closed_subpath=MagickFalse;
6336 for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
6337 {
6338 p->primitive=primitive_info->primitive;
6339 p--;
6340 }
6341 return(MagickTrue);
6342}
6343
6344static MagickBooleanType TraceBezier(MVGInfo *mvg_info,
6345 const size_t number_coordinates)
6346{
6347 double
6348 alpha,
6349 *coefficients,
6350 weight;
6351
6352 PointInfo
6353 end,
6354 point,
6355 *points;
6356
6357 PrimitiveInfo
6358 *primitive_info;
6359
6360 PrimitiveInfo
6361 *p;
6362
6363 ssize_t
6364 i,
6365 j;
6366
6367 size_t
6368 control_points,
6369 quantum;
6370
6371 /*
6372 Allocate coefficients.
6373 */
6374 primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6375 quantum=number_coordinates;
6376 for (i=0; i < (ssize_t) number_coordinates; i++)
6377 {
6378 for (j=i+1; j < (ssize_t) number_coordinates; j++)
6379 {
6380 alpha=fabs(primitive_info[j].point.x-primitive_info[i].point.x);
6381 if (alpha > (double) GetMaxMemoryRequest())
6382 {
6383 (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
6384 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
6385 return(MagickFalse);
6386 }
6387 if (alpha > (double) quantum)
6388 quantum=(size_t) alpha;
6389 alpha=fabs(primitive_info[j].point.y-primitive_info[i].point.y);
6390 if (alpha > (double) quantum)
6391 quantum=(size_t) alpha;
6392 }
6393 }
6394 primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6395 quantum=MagickMin(quantum/number_coordinates,BezierQuantum);
6396 if (quantum > (double) GetMaxMemoryRequest())
6397 {
6398 (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
6399 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
6400 return(MagickFalse);
6401 }
6402 coefficients=(double *) AcquireQuantumMemory(number_coordinates,
6403 sizeof(*coefficients));
6404 points=(PointInfo *) AcquireQuantumMemory(quantum,number_coordinates*
6405 sizeof(*points));
6406 if ((coefficients == (double *) NULL) || (points == (PointInfo *) NULL))
6407 {
6408 if (points != (PointInfo *) NULL)
6409 points=(PointInfo *) RelinquishMagickMemory(points);
6410 if (coefficients != (double *) NULL)
6411 coefficients=(double *) RelinquishMagickMemory(coefficients);
6412 (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
6413 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
6414 return(MagickFalse);
6415 }
6416 control_points=quantum*number_coordinates;
6417 if (CheckPrimitiveExtent(mvg_info,(double) control_points+1) == MagickFalse)
6418 {
6419 points=(PointInfo *) RelinquishMagickMemory(points);
6420 coefficients=(double *) RelinquishMagickMemory(coefficients);
6421 return(MagickFalse);
6422 }
6423 primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6424 /*
6425 Compute bezier points.
6426 */
6427 end=primitive_info[number_coordinates-1].point;
6428 for (i=0; i < (ssize_t) number_coordinates; i++)
6429 coefficients[i]=Permutate((ssize_t) number_coordinates-1,i);
6430 weight=0.0;
6431 for (i=0; i < (ssize_t) control_points; i++)
6432 {
6433 p=primitive_info;
6434 point.x=0.0;
6435 point.y=0.0;
6436 alpha=pow((double) (1.0-weight),(double) number_coordinates-1.0);
6437 for (j=0; j < (ssize_t) number_coordinates; j++)
6438 {
6439 point.x+=alpha*coefficients[j]*p->point.x;
6440 point.y+=alpha*coefficients[j]*p->point.y;
6441 alpha*=weight/(1.0-weight);
6442 p++;
6443 }
6444 points[i]=point;
6445 weight+=1.0/control_points;
6446 }
6447 /*
6448 Bezier curves are just short segmented polys.
6449 */
6450 p=primitive_info;
6451 for (i=0; i < (ssize_t) control_points; i++)
6452 {
6453 if (TracePoint(p,points[i]) == MagickFalse)
6454 {
6455 points=(PointInfo *) RelinquishMagickMemory(points);
6456 coefficients=(double *) RelinquishMagickMemory(coefficients);
6457 return(MagickFalse);
6458 }
6459 p+=(ptrdiff_t) p->coordinates;
6460 }
6461 if (TracePoint(p,end) == MagickFalse)
6462 {
6463 points=(PointInfo *) RelinquishMagickMemory(points);
6464 coefficients=(double *) RelinquishMagickMemory(coefficients);
6465 return(MagickFalse);
6466 }
6467 p+=(ptrdiff_t) p->coordinates;
6468 primitive_info->coordinates=(size_t) (p-primitive_info);
6469 primitive_info->closed_subpath=MagickFalse;
6470 for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
6471 {
6472 p->primitive=primitive_info->primitive;
6473 p--;
6474 }
6475 points=(PointInfo *) RelinquishMagickMemory(points);
6476 coefficients=(double *) RelinquishMagickMemory(coefficients);
6477 return(MagickTrue);
6478}
6479
6480static MagickBooleanType TraceCircle(MVGInfo *mvg_info,const PointInfo start,
6481 const PointInfo end)
6482{
6483 double
6484 alpha,
6485 beta,
6486 radius;
6487
6488 PointInfo
6489 offset,
6490 degrees;
6491
6492 alpha=end.x-start.x;
6493 beta=end.y-start.y;
6494 radius=hypot((double) alpha,(double) beta);
6495 offset.x=(double) radius;
6496 offset.y=(double) radius;
6497 degrees.x=0.0;
6498 degrees.y=360.0;
6499 return(TraceEllipse(mvg_info,start,offset,degrees));
6500}
6501
6502static MagickBooleanType TraceEllipse(MVGInfo *mvg_info,const PointInfo center,
6503 const PointInfo radii,const PointInfo arc)
6504{
6505 double
6506 coordinates,
6507 delta,
6508 step,
6509 x,
6510 y;
6511
6512 PointInfo
6513 angle,
6514 point;
6515
6516 PrimitiveInfo
6517 *primitive_info;
6518
6519 PrimitiveInfo
6520 *p;
6521
6522 ssize_t
6523 i;
6524
6525 /*
6526 Ellipses are just short segmented polys.
6527 */
6528 primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6529 primitive_info->coordinates=0;
6530 if ((fabs(radii.x) < MagickEpsilon) || (fabs(radii.y) < MagickEpsilon))
6531 return(MagickTrue);
6532 delta=MagickSafeReciprocal(MagickMax(radii.x,radii.y));
6533 step=MagickPI/(MagickPI*MagickSafeReciprocal(delta))/8.0;
6534 angle.x=DegreesToRadians(arc.x);
6535 y=arc.y;
6536 while (y < arc.x)
6537 y+=360.0;
6538 angle.y=DegreesToRadians(y);
6539 coordinates=ceil((angle.y-angle.x)/step+1.0);
6540 if (CheckPrimitiveExtent(mvg_info,coordinates+1) == MagickFalse)
6541 return(MagickFalse);
6542 i=0;
6543 primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6544 for (p=primitive_info; angle.x < angle.y; angle.x+=step)
6545 {
6546 point.x=cos(fmod(angle.x,DegreesToRadians(360.0)))*radii.x+center.x;
6547 point.y=sin(fmod(angle.x,DegreesToRadians(360.0)))*radii.y+center.y;
6548 if (i++ >= (ssize_t) coordinates)
6549 break;
6550 if (TracePoint(p,point) == MagickFalse)
6551 return(MagickFalse);
6552 p+=(ptrdiff_t) p->coordinates;
6553 }
6554 point.x=cos(fmod(angle.y,DegreesToRadians(360.0)))*radii.x+center.x;
6555 point.y=sin(fmod(angle.y,DegreesToRadians(360.0)))*radii.y+center.y;
6556 if (TracePoint(p,point) == MagickFalse)
6557 return(MagickFalse);
6558 p+=(ptrdiff_t) p->coordinates;
6559 primitive_info->coordinates=(size_t) (p-primitive_info);
6560 primitive_info->closed_subpath=MagickFalse;
6561 x=fabs(primitive_info[0].point.x-
6562 primitive_info[primitive_info->coordinates-1].point.x);
6563 y=fabs(primitive_info[0].point.y-
6564 primitive_info[primitive_info->coordinates-1].point.y);
6565 if ((x < MagickEpsilon) && (y < MagickEpsilon))
6566 primitive_info->closed_subpath=MagickTrue;
6567 for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
6568 {
6569 p->primitive=primitive_info->primitive;
6570 p--;
6571 }
6572 return(MagickTrue);
6573}
6574
6575static MagickBooleanType TraceLine(PrimitiveInfo *primitive_info,
6576 const PointInfo start,const PointInfo end)
6577{
6578 if (TracePoint(primitive_info,start) == MagickFalse)
6579 return(MagickFalse);
6580 if (TracePoint(primitive_info+1,end) == MagickFalse)
6581 return(MagickFalse);
6582 (primitive_info+1)->primitive=primitive_info->primitive;
6583 primitive_info->coordinates=2;
6584 primitive_info->closed_subpath=MagickFalse;
6585 return(MagickTrue);
6586}
6587
6588static ssize_t TracePath(Image *image,MVGInfo *mvg_info,const char *path)
6589{
6590 char
6591 *next_token,
6592 token[MaxTextExtent] = "";
6593
6594 const char
6595 *p;
6596
6597 double
6598 x,
6599 y;
6600
6601 int
6602 attribute,
6603 last_attribute;
6604
6605 MagickStatusType
6606 status;
6607
6608 PointInfo
6609 end = {0.0, 0.0},
6610 points[4] = { {0.0, 0.0}, {0.0, 0.0}, {0.0, 0.0}, {0.0, 0.0} },
6611 point = {0.0, 0.0},
6612 start = {0.0, 0.0};
6613
6614 PrimitiveInfo
6615 *primitive_info;
6616
6617 PrimitiveType
6618 primitive_type;
6619
6620 PrimitiveInfo
6621 *q;
6622
6623 ssize_t
6624 i;
6625
6626 size_t
6627 number_coordinates,
6628 z_count;
6629
6630 ssize_t
6631 subpath_offset;
6632
6633 subpath_offset=mvg_info->offset;
6634 primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6635 status=MagickTrue;
6636 attribute=0;
6637 number_coordinates=0;
6638 z_count=0;
6639 *token='\0';
6640 primitive_type=primitive_info->primitive;
6641 q=primitive_info;
6642 for (p=path; *p != '\0'; )
6643 {
6644 if (status == MagickFalse)
6645 break;
6646 while (isspace((int) ((unsigned char) *p)) != 0)
6647 p++;
6648 if (*p == '\0')
6649 break;
6650 last_attribute=attribute;
6651 attribute=(int) (*p++);
6652 switch (attribute)
6653 {
6654 case 'a':
6655 case 'A':
6656 {
6657 double
6658 angle = 0.0;
6659
6660 MagickBooleanType
6661 large_arc = MagickFalse,
6662 sweep = MagickFalse;
6663
6664 PointInfo
6665 arc = {0.0, 0.0};
6666
6667 /*
6668 Elliptical arc.
6669 */
6670 do
6671 {
6672 (void) GetNextToken(p,&p,MaxTextExtent,token);
6673 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6674 ThrowPointExpectedException(image,token);
6675 if (*token == ',')
6676 (void) GetNextToken(p,&p,MaxTextExtent,token);
6677 arc.x=GetDrawValue(token,&next_token);
6678 if (token == next_token)
6679 ThrowPointExpectedException(image,token);
6680 (void) GetNextToken(p,&p,MaxTextExtent,token);
6681 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6682 ThrowPointExpectedException(image,token);
6683 if (*token == ',')
6684 (void) GetNextToken(p,&p,MaxTextExtent,token);
6685 arc.y=GetDrawValue(token,&next_token);
6686 if (token == next_token)
6687 ThrowPointExpectedException(image,token);
6688 (void) GetNextToken(p,&p,MaxTextExtent,token);
6689 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6690 ThrowPointExpectedException(image,token);
6691 if (*token == ',')
6692 (void) GetNextToken(p,&p,MaxTextExtent,token);
6693 angle=GetDrawValue(token,&next_token);
6694 if (token == next_token)
6695 ThrowPointExpectedException(image,token);
6696 (void) GetNextToken(p,&p,MaxTextExtent,token);
6697 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6698 ThrowPointExpectedException(image,token);
6699 if (*token == ',')
6700 (void) GetNextToken(p,&p,MaxTextExtent,token);
6701 large_arc=StringToLong(token) != 0 ? MagickTrue : MagickFalse;
6702 (void) GetNextToken(p,&p,MaxTextExtent,token);
6703 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6704 ThrowPointExpectedException(image,token);
6705 if (*token == ',')
6706 (void) GetNextToken(p,&p,MaxTextExtent,token);
6707 sweep=StringToLong(token) != 0 ? MagickTrue : MagickFalse;
6708 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6709 ThrowPointExpectedException(image,token);
6710 if (*token == ',')
6711 (void) GetNextToken(p,&p,MaxTextExtent,token);
6712 (void) GetNextToken(p,&p,MaxTextExtent,token);
6713 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6714 ThrowPointExpectedException(image,token);
6715 if (*token == ',')
6716 (void) GetNextToken(p,&p,MaxTextExtent,token);
6717 x=GetDrawValue(token,&next_token);
6718 if (token == next_token)
6719 ThrowPointExpectedException(image,token);
6720 (void) GetNextToken(p,&p,MaxTextExtent,token);
6721 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6722 ThrowPointExpectedException(image,token);
6723 if (*token == ',')
6724 (void) GetNextToken(p,&p,MaxTextExtent,token);
6725 y=GetDrawValue(token,&next_token);
6726 if (token == next_token)
6727 ThrowPointExpectedException(image,token);
6728 end.x=(double) (attribute == (int) 'A' ? x : point.x+x);
6729 end.y=(double) (attribute == (int) 'A' ? y : point.y+y);
6730 status&=TraceArcPath(mvg_info,point,end,arc,angle,large_arc,sweep);
6731 q=(*mvg_info->primitive_info)+mvg_info->offset;
6732 mvg_info->offset+=q->coordinates;
6733 q+=(ptrdiff_t) q->coordinates;
6734 point=end;
6735 while (isspace((int) ((unsigned char) *p)) != 0)
6736 p++;
6737 if (*p == ',')
6738 p++;
6739 } while (IsValidPoint(p) != MagickFalse);
6740 break;
6741 }
6742 case 'c':
6743 case 'C':
6744 {
6745 /*
6746 Cubic Bézier curve.
6747 */
6748 do
6749 {
6750 points[0]=point;
6751 for (i=1; i < 4; i++)
6752 {
6753 (void) GetNextToken(p,&p,MaxTextExtent,token);
6754 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6755 ThrowPointExpectedException(image,token);
6756 if (*token == ',')
6757 (void) GetNextToken(p,&p,MaxTextExtent,token);
6758 x=GetDrawValue(token,&next_token);
6759 if (token == next_token)
6760 ThrowPointExpectedException(image,token);
6761 (void) GetNextToken(p,&p,MaxTextExtent,token);
6762 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6763 ThrowPointExpectedException(image,token);
6764 if (*token == ',')
6765 (void) GetNextToken(p,&p,MaxTextExtent,token);
6766 y=GetDrawValue(token,&next_token);
6767 if (token == next_token)
6768 ThrowPointExpectedException(image,token);
6769 end.x=(double) (attribute == (int) 'C' ? x : point.x+x);
6770 end.y=(double) (attribute == (int) 'C' ? y : point.y+y);
6771 points[i]=end;
6772 }
6773 for (i=0; i < 4; i++)
6774 (q+i)->point=points[i];
6775 if (TraceBezier(mvg_info,4) == MagickFalse)
6776 return(-1);
6777 q=(*mvg_info->primitive_info)+mvg_info->offset;
6778 mvg_info->offset+=q->coordinates;
6779 q+=(ptrdiff_t) q->coordinates;
6780 point=end;
6781 while (isspace((int) ((unsigned char) *p)) != 0)
6782 p++;
6783 if (*p == ',')
6784 p++;
6785 } while (IsValidPoint(p) != MagickFalse);
6786 break;
6787 }
6788 case 'H':
6789 case 'h':
6790 {
6791 do
6792 {
6793 (void) GetNextToken(p,&p,MaxTextExtent,token);
6794 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6795 ThrowPointExpectedException(image,token);
6796 if (*token == ',')
6797 (void) GetNextToken(p,&p,MaxTextExtent,token);
6798 x=GetDrawValue(token,&next_token);
6799 if (token == next_token)
6800 ThrowPointExpectedException(image,token);
6801 point.x=(double) (attribute == (int) 'H' ? x: point.x+x);
6802 if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6803 return(-1);
6804 q=(*mvg_info->primitive_info)+mvg_info->offset;
6805 if (TracePoint(q,point) == MagickFalse)
6806 return(-1);
6807 mvg_info->offset+=q->coordinates;
6808 q+=(ptrdiff_t) q->coordinates;
6809 while (isspace((int) ((unsigned char) *p)) != 0)
6810 p++;
6811 if (*p == ',')
6812 p++;
6813 } while (IsValidPoint(p) != MagickFalse);
6814 break;
6815 }
6816 case 'l':
6817 case 'L':
6818 {
6819 /*
6820 Line to.
6821 */
6822 do
6823 {
6824 (void) GetNextToken(p,&p,MaxTextExtent,token);
6825 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6826 ThrowPointExpectedException(image,token);
6827 if (*token == ',')
6828 (void) GetNextToken(p,&p,MaxTextExtent,token);
6829 x=GetDrawValue(token,&next_token);
6830 if (token == next_token)
6831 ThrowPointExpectedException(image,token);
6832 (void) GetNextToken(p,&p,MaxTextExtent,token);
6833 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6834 ThrowPointExpectedException(image,token);
6835 if (*token == ',')
6836 (void) GetNextToken(p,&p,MaxTextExtent,token);
6837 y=GetDrawValue(token,&next_token);
6838 if (token == next_token)
6839 ThrowPointExpectedException(image,token);
6840 point.x=(double) (attribute == (int) 'L' ? x : point.x+x);
6841 point.y=(double) (attribute == (int) 'L' ? y : point.y+y);
6842 if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6843 return(-1);
6844 q=(*mvg_info->primitive_info)+mvg_info->offset;
6845 if (TracePoint(q,point) == MagickFalse)
6846 return(-1);
6847 mvg_info->offset+=q->coordinates;
6848 q+=(ptrdiff_t) q->coordinates;
6849 while (isspace((int) ((unsigned char) *p)) != 0)
6850 p++;
6851 if (*p == ',')
6852 p++;
6853 } while (IsValidPoint(p) != MagickFalse);
6854 break;
6855 }
6856 case 'M':
6857 case 'm':
6858 {
6859 /*
6860 Move to.
6861 */
6862 if (mvg_info->offset != subpath_offset)
6863 {
6864 primitive_info=(*mvg_info->primitive_info)+subpath_offset;
6865 primitive_info->coordinates=(size_t) (q-primitive_info);
6866 number_coordinates+=primitive_info->coordinates;
6867 primitive_info=q;
6868 subpath_offset=mvg_info->offset;
6869 }
6870 i=0;
6871 do
6872 {
6873 (void) GetNextToken(p,&p,MaxTextExtent,token);
6874 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6875 ThrowPointExpectedException(image,token);
6876 if (*token == ',')
6877 (void) GetNextToken(p,&p,MaxTextExtent,token);
6878 x=GetDrawValue(token,&next_token);
6879 if (token == next_token)
6880 ThrowPointExpectedException(image,token);
6881 (void) GetNextToken(p,&p,MaxTextExtent,token);
6882 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6883 ThrowPointExpectedException(image,token);
6884 if (*token == ',')
6885 (void) GetNextToken(p,&p,MaxTextExtent,token);
6886 y=GetDrawValue(token,&next_token);
6887 if (token == next_token)
6888 ThrowPointExpectedException(image,token);
6889 point.x=(double) (attribute == (int) 'M' ? x : point.x+x);
6890 point.y=(double) (attribute == (int) 'M' ? y : point.y+y);
6891 if (i == 0)
6892 start=point;
6893 i++;
6894 if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6895 return(-1);
6896 q=(*mvg_info->primitive_info)+mvg_info->offset;
6897 if (TracePoint(q,point) == MagickFalse)
6898 return(-1);
6899 mvg_info->offset+=q->coordinates;
6900 q+=(ptrdiff_t) q->coordinates;
6901 while (isspace((int) ((unsigned char) *p)) != 0)
6902 p++;
6903 if (*p == ',')
6904 p++;
6905 } while (IsValidPoint(p) != MagickFalse);
6906 break;
6907 }
6908 case 'q':
6909 case 'Q':
6910 {
6911 /*
6912 Quadratic Bézier curve.
6913 */
6914 do
6915 {
6916 points[0]=point;
6917 for (i=1; i < 3; i++)
6918 {
6919 (void) GetNextToken(p,&p,MaxTextExtent,token);
6920 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6921 ThrowPointExpectedException(image,token);
6922 if (*token == ',')
6923 (void) GetNextToken(p,&p,MaxTextExtent,token);
6924 x=GetDrawValue(token,&next_token);
6925 if (token == next_token)
6926 ThrowPointExpectedException(image,token);
6927 (void) GetNextToken(p,&p,MaxTextExtent,token);
6928 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6929 ThrowPointExpectedException(image,token);
6930 if (*token == ',')
6931 (void) GetNextToken(p,&p,MaxTextExtent,token);
6932 y=GetDrawValue(token,&next_token);
6933 if (token == next_token)
6934 ThrowPointExpectedException(image,token);
6935 if (*p == ',')
6936 p++;
6937 end.x=(double) (attribute == (int) 'Q' ? x : point.x+x);
6938 end.y=(double) (attribute == (int) 'Q' ? y : point.y+y);
6939 points[i]=end;
6940 }
6941 for (i=0; i < 3; i++)
6942 (q+i)->point=points[i];
6943 if (TraceBezier(mvg_info,3) == MagickFalse)
6944 return(-1);
6945 q=(*mvg_info->primitive_info)+mvg_info->offset;
6946 mvg_info->offset+=q->coordinates;
6947 q+=(ptrdiff_t) q->coordinates;
6948 point=end;
6949 while (isspace((int) ((unsigned char) *p)) != 0)
6950 p++;
6951 if (*p == ',')
6952 p++;
6953 } while (IsValidPoint(p) != MagickFalse);
6954 break;
6955 }
6956 case 's':
6957 case 'S':
6958 {
6959 /*
6960 Cubic Bézier curve.
6961 */
6962 do
6963 {
6964 points[0]=points[3];
6965 points[1].x=2.0*points[3].x-points[2].x;
6966 points[1].y=2.0*points[3].y-points[2].y;
6967 for (i=2; i < 4; i++)
6968 {
6969 (void) GetNextToken(p,&p,MaxTextExtent,token);
6970 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6971 ThrowPointExpectedException(image,token);
6972 if (*token == ',')
6973 (void) GetNextToken(p,&p,MaxTextExtent,token);
6974 x=GetDrawValue(token,&next_token);
6975 if (token == next_token)
6976 ThrowPointExpectedException(image,token);
6977 (void) GetNextToken(p,&p,MaxTextExtent,token);
6978 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
6979 ThrowPointExpectedException(image,token);
6980 if (*token == ',')
6981 (void) GetNextToken(p,&p,MaxTextExtent,token);
6982 y=GetDrawValue(token,&next_token);
6983 if (token == next_token)
6984 ThrowPointExpectedException(image,token);
6985 if (*p == ',')
6986 p++;
6987 end.x=(double) (attribute == (int) 'S' ? x : point.x+x);
6988 end.y=(double) (attribute == (int) 'S' ? y : point.y+y);
6989 points[i]=end;
6990 }
6991 if (strchr("CcSs",last_attribute) == (char *) NULL)
6992 {
6993 points[0]=point;
6994 points[1]=point;
6995 }
6996 for (i=0; i < 4; i++)
6997 (q+i)->point=points[i];
6998 if (TraceBezier(mvg_info,4) == MagickFalse)
6999 return(-1);
7000 q=(*mvg_info->primitive_info)+mvg_info->offset;
7001 mvg_info->offset+=q->coordinates;
7002 q+=(ptrdiff_t) q->coordinates;
7003 point=end;
7004 last_attribute=attribute;
7005 while (isspace((int) ((unsigned char) *p)) != 0)
7006 p++;
7007 if (*p == ',')
7008 p++;
7009 } while (IsValidPoint(p) != MagickFalse);
7010 break;
7011 }
7012 case 't':
7013 case 'T':
7014 {
7015 /*
7016 Quadratic Bézier curve.
7017 */
7018 do
7019 {
7020 points[0]=points[2];
7021 points[1].x=2.0*points[2].x-points[1].x;
7022 points[1].y=2.0*points[2].y-points[1].y;
7023 for (i=2; i < 3; i++)
7024 {
7025 (void) GetNextToken(p,&p,MaxTextExtent,token);
7026 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
7027 ThrowPointExpectedException(image,token);
7028 if (*token == ',')
7029 (void) GetNextToken(p,&p,MaxTextExtent,token);
7030 x=GetDrawValue(token,&next_token);
7031 if (token == next_token)
7032 ThrowPointExpectedException(image,token);
7033 (void) GetNextToken(p,&p,MaxTextExtent,token);
7034 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
7035 ThrowPointExpectedException(image,token);
7036 if (*token == ',')
7037 (void) GetNextToken(p,&p,MaxTextExtent,token);
7038 y=GetDrawValue(token,&next_token);
7039 if (token == next_token)
7040 ThrowPointExpectedException(image,token);
7041 end.x=(double) (attribute == (int) 'T' ? x : point.x+x);
7042 end.y=(double) (attribute == (int) 'T' ? y : point.y+y);
7043 points[i]=end;
7044 }
7045 if (status == MagickFalse)
7046 break;
7047 if (strchr("QqTt",last_attribute) == (char *) NULL)
7048 {
7049 points[0]=point;
7050 points[1]=point;
7051 }
7052 for (i=0; i < 3; i++)
7053 (q+i)->point=points[i];
7054 if (TraceBezier(mvg_info,3) == MagickFalse)
7055 return(-1);
7056 q=(*mvg_info->primitive_info)+mvg_info->offset;
7057 mvg_info->offset+=q->coordinates;
7058 q+=(ptrdiff_t) q->coordinates;
7059 point=end;
7060 last_attribute=attribute;
7061 while (isspace((int) ((unsigned char) *p)) != 0)
7062 p++;
7063 if (*p == ',')
7064 p++;
7065 } while (IsValidPoint(p) != MagickFalse);
7066 break;
7067 }
7068 case 'v':
7069 case 'V':
7070 {
7071 /*
7072 Line to.
7073 */
7074 do
7075 {
7076 (void) GetNextToken(p,&p,MaxTextExtent,token);
7077 if (IsValidListChar((int) ((unsigned char) *token)) == MagickFalse)
7078 ThrowPointExpectedException(image,token);
7079 if (*token == ',')
7080 (void) GetNextToken(p,&p,MaxTextExtent,token);
7081 y=GetDrawValue(token,&next_token);
7082 if (token == next_token)
7083 ThrowPointExpectedException(image,token);
7084 point.y=(double) (attribute == (int) 'V' ? y : point.y+y);
7085 if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
7086 return(-1);
7087 q=(*mvg_info->primitive_info)+mvg_info->offset;
7088 if (TracePoint(q,point) == MagickFalse)
7089 return(-1);
7090 mvg_info->offset+=q->coordinates;
7091 q+=(ptrdiff_t) q->coordinates;
7092 while (isspace((int) ((unsigned char) *p)) != 0)
7093 p++;
7094 if (*p == ',')
7095 p++;
7096 } while (IsValidPoint(p) != MagickFalse);
7097 break;
7098 }
7099 case 'z':
7100 case 'Z':
7101 {
7102 /*
7103 Close path.
7104 */
7105 point=start;
7106 if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
7107 return(-1);
7108 q=(*mvg_info->primitive_info)+mvg_info->offset;
7109 if (TracePoint(q,point) == MagickFalse)
7110 return(-1);
7111 mvg_info->offset+=q->coordinates;
7112 q+=(ptrdiff_t) q->coordinates;
7113 primitive_info=(*mvg_info->primitive_info)+subpath_offset;
7114 primitive_info->coordinates=(size_t) (q-primitive_info);
7115 primitive_info->closed_subpath=MagickTrue;
7116 number_coordinates+=primitive_info->coordinates;
7117 primitive_info=q;
7118 subpath_offset=mvg_info->offset;
7119 z_count++;
7120 break;
7121 }
7122 default:
7123 {
7124 ThrowPointExpectedException(image,token);
7125 break;
7126 }
7127 }
7128 }
7129 if (status == MagickFalse)
7130 return(-1);
7131 primitive_info=(*mvg_info->primitive_info)+subpath_offset;
7132 primitive_info->coordinates=(size_t) (q-primitive_info);
7133 number_coordinates+=primitive_info->coordinates;
7134 for (i=0; i < (ssize_t) number_coordinates; i++)
7135 {
7136 q--;
7137 q->primitive=primitive_type;
7138 if (z_count > 1)
7139 q->method=FillToBorderMethod;
7140 }
7141 q=primitive_info;
7142 return((ssize_t) number_coordinates);
7143}
7144
7145static MagickBooleanType TraceRectangle(PrimitiveInfo *primitive_info,
7146 const PointInfo start,const PointInfo end)
7147{
7148 PointInfo
7149 point;
7150
7151 PrimitiveInfo
7152 *p;
7153
7154 ssize_t
7155 i;
7156
7157 p=primitive_info;
7158 if (TracePoint(p,start) == MagickFalse)
7159 return(MagickFalse);
7160 p+=(ptrdiff_t) p->coordinates;
7161 point.x=start.x;
7162 point.y=end.y;
7163 if (TracePoint(p,point) == MagickFalse)
7164 return(MagickFalse);
7165 p+=(ptrdiff_t) p->coordinates;
7166 if (TracePoint(p,end) == MagickFalse)
7167 return(MagickFalse);
7168 p+=(ptrdiff_t) p->coordinates;
7169 point.x=end.x;
7170 point.y=start.y;
7171 if (TracePoint(p,point) == MagickFalse)
7172 return(MagickFalse);
7173 p+=(ptrdiff_t) p->coordinates;
7174 if (TracePoint(p,start) == MagickFalse)
7175 return(MagickFalse);
7176 p+=(ptrdiff_t) p->coordinates;
7177 primitive_info->coordinates=(size_t) (p-primitive_info);
7178 primitive_info->closed_subpath=MagickTrue;
7179 for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
7180 {
7181 p->primitive=primitive_info->primitive;
7182 p--;
7183 }
7184 return(MagickTrue);
7185}
7186
7187static MagickBooleanType TraceRoundRectangle(MVGInfo *mvg_info,
7188 const PointInfo start,const PointInfo end,PointInfo arc)
7189{
7190 PointInfo
7191 degrees,
7192 point,
7193 segment;
7194
7195 PrimitiveInfo
7196 *primitive_info;
7197
7198 PrimitiveInfo
7199 *p;
7200
7201 ssize_t
7202 i;
7203
7204 ssize_t
7205 offset;
7206
7207 offset=mvg_info->offset;
7208 segment.x=fabs(end.x-start.x);
7209 segment.y=fabs(end.y-start.y);
7210 if ((segment.x < MagickEpsilon) || (segment.y < MagickEpsilon))
7211 {
7212 (*mvg_info->primitive_info+mvg_info->offset)->coordinates=0;
7213 return(MagickTrue);
7214 }
7215 if (arc.x > (0.5*segment.x))
7216 arc.x=0.5*segment.x;
7217 if (arc.y > (0.5*segment.y))
7218 arc.y=0.5*segment.y;
7219 point.x=start.x+segment.x-arc.x;
7220 point.y=start.y+arc.y;
7221 degrees.x=270.0;
7222 degrees.y=360.0;
7223 if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
7224 return(MagickFalse);
7225 p=(*mvg_info->primitive_info)+(ptrdiff_t) mvg_info->offset;
7226 mvg_info->offset+=p->coordinates;
7227 point.x=start.x+segment.x-arc.x;
7228 point.y=start.y+segment.y-arc.y;
7229 degrees.x=0.0;
7230 degrees.y=90.0;
7231 if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
7232 return(MagickFalse);
7233 p=(*mvg_info->primitive_info)+(ptrdiff_t) mvg_info->offset;
7234 mvg_info->offset+=p->coordinates;
7235 point.x=start.x+arc.x;
7236 point.y=start.y+segment.y-arc.y;
7237 degrees.x=90.0;
7238 degrees.y=180.0;
7239 if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
7240 return(MagickFalse);
7241 p=(*mvg_info->primitive_info)+(ptrdiff_t) mvg_info->offset;
7242 mvg_info->offset+=p->coordinates;
7243 point.x=start.x+arc.x;
7244 point.y=start.y+arc.y;
7245 degrees.x=180.0;
7246 degrees.y=270.0;
7247 if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
7248 return(MagickFalse);
7249 p=(*mvg_info->primitive_info)+(ptrdiff_t) mvg_info->offset;
7250 mvg_info->offset+=p->coordinates;
7251 if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
7252 return(MagickFalse);
7253 p=(*mvg_info->primitive_info)+(ptrdiff_t) mvg_info->offset;
7254 if (TracePoint(p,(*mvg_info->primitive_info+offset)->point) == MagickFalse)
7255 return(MagickFalse);
7256 p+=(ptrdiff_t) p->coordinates;
7257 mvg_info->offset=offset;
7258 primitive_info=(*mvg_info->primitive_info)+offset;
7259 primitive_info->coordinates=(size_t) (p-primitive_info);
7260 primitive_info->closed_subpath=MagickTrue;
7261 for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
7262 {
7263 p->primitive=primitive_info->primitive;
7264 p--;
7265 }
7266 return(MagickTrue);
7267}
7268
7269static MagickBooleanType TraceSquareLinecap(PrimitiveInfo *primitive_info,
7270 const size_t number_vertices,const double offset)
7271{
7272 double
7273 distance;
7274
7275 double
7276 dx,
7277 dy;
7278
7279 ssize_t
7280 i;
7281
7282 ssize_t
7283 j;
7284
7285 dx=0.0;
7286 dy=0.0;
7287 for (i=1; i < (ssize_t) number_vertices; i++)
7288 {
7289 dx=primitive_info[0].point.x-primitive_info[i].point.x;
7290 dy=primitive_info[0].point.y-primitive_info[i].point.y;
7291 if ((fabs((double) dx) >= MagickEpsilon) ||
7292 (fabs((double) dy) >= MagickEpsilon))
7293 break;
7294 }
7295 if (i == (ssize_t) number_vertices)
7296 i=(ssize_t) number_vertices-1L;
7297 distance=hypot((double) dx,(double) dy);
7298 primitive_info[0].point.x=(double) (primitive_info[i].point.x+
7299 dx*(distance+offset)/distance);
7300 primitive_info[0].point.y=(double) (primitive_info[i].point.y+
7301 dy*(distance+offset)/distance);
7302 for (j=(ssize_t) number_vertices-2; j >= 0; j--)
7303 {
7304 dx=primitive_info[number_vertices-1].point.x-primitive_info[j].point.x;
7305 dy=primitive_info[number_vertices-1].point.y-primitive_info[j].point.y;
7306 if ((fabs((double) dx) >= MagickEpsilon) ||
7307 (fabs((double) dy) >= MagickEpsilon))
7308 break;
7309 }
7310 distance=hypot((double) dx,(double) dy);
7311 primitive_info[number_vertices-1].point.x=(double) (primitive_info[j].point.x+
7312 dx*(distance+offset)/distance);
7313 primitive_info[number_vertices-1].point.y=(double) (primitive_info[j].point.y+
7314 dy*(distance+offset)/distance);
7315 return(MagickTrue);
7316}
7317
7318static PrimitiveInfo *TraceStrokePolygon(const DrawInfo *draw_info,
7319 const PrimitiveInfo *primitive_info,ExceptionInfo *exception)
7320{
7321#define MaxStrokePad (6*BezierQuantum+360)
7322#define CheckPathExtent(pad_p,pad_q) \
7323{ \
7324 if ((pad_p) > MaxBezierCoordinates) \
7325 stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p); \
7326 else \
7327 if ((ssize_t) (p+(pad_p)) >= (ssize_t) extent_p) \
7328 { \
7329 if (~extent_p < (pad_p)) \
7330 stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p); \
7331 else \
7332 { \
7333 extent_p+=(pad_p); \
7334 stroke_p=(PointInfo *) ResizeQuantumMemory(stroke_p,extent_p+ \
7335 MaxStrokePad,sizeof(*stroke_p)); \
7336 } \
7337 } \
7338 if ((pad_q) > MaxBezierCoordinates) \
7339 stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q); \
7340 else \
7341 if ((ssize_t) (q+(pad_q)) >= (ssize_t) extent_q) \
7342 { \
7343 if (~extent_q < (pad_q)) \
7344 stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q); \
7345 else \
7346 { \
7347 extent_q+=(pad_q); \
7348 stroke_q=(PointInfo *) ResizeQuantumMemory(stroke_q,extent_q+ \
7349 MaxStrokePad,sizeof(*stroke_q)); \
7350 } \
7351 } \
7352 if ((stroke_p == (PointInfo *) NULL) || (stroke_q == (PointInfo *) NULL)) \
7353 { \
7354 if (stroke_p != (PointInfo *) NULL) \
7355 stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p); \
7356 if (stroke_q != (PointInfo *) NULL) \
7357 stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q); \
7358 polygon_primitive=(PrimitiveInfo *) \
7359 RelinquishMagickMemory(polygon_primitive); \
7360 (void) ThrowMagickException(exception,GetMagickModule(), \
7361 ResourceLimitError,"MemoryAllocationFailed","`%s'",""); \
7362 return((PrimitiveInfo *) NULL); \
7363 } \
7364}
7365
7366 typedef struct _StrokeSegment
7367 {
7368 double
7369 p,
7370 q;
7371 } StrokeSegment;
7372
7373 double
7374 delta_theta,
7375 dot_product,
7376 mid,
7377 miterlimit;
7378
7379 MagickBooleanType
7380 closed_path;
7381
7382 PointInfo
7383 box_p[5],
7384 box_q[5],
7385 center,
7386 offset,
7387 *stroke_p,
7388 *stroke_q;
7389
7390 PrimitiveInfo
7391 *polygon_primitive,
7392 *stroke_polygon;
7393
7394 ssize_t
7395 i;
7396
7397 size_t
7398 arc_segments,
7399 extent_p,
7400 extent_q,
7401 number_vertices;
7402
7403 ssize_t
7404 j,
7405 n,
7406 p,
7407 q;
7408
7409 StrokeSegment
7410 dx = {0.0, 0.0},
7411 dy = {0.0, 0.0},
7412 inverse_slope = {0.0, 0.0},
7413 slope = {0.0, 0.0},
7414 theta = {0.0, 0.0};
7415
7416 /*
7417 Allocate paths.
7418 */
7419 number_vertices=primitive_info->coordinates;
7420 polygon_primitive=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
7421 number_vertices+2UL,sizeof(*polygon_primitive));
7422 if (polygon_primitive == (PrimitiveInfo *) NULL)
7423 {
7424 (void) ThrowMagickException(exception,GetMagickModule(),
7425 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
7426 return((PrimitiveInfo *) NULL);
7427 }
7428 (void) memcpy(polygon_primitive,primitive_info,(size_t) number_vertices*
7429 sizeof(*polygon_primitive));
7430 offset.x=primitive_info[number_vertices-1].point.x-primitive_info[0].point.x;
7431 offset.y=primitive_info[number_vertices-1].point.y-primitive_info[0].point.y;
7432 closed_path=(fabs(offset.x) < MagickEpsilon) &&
7433 (fabs(offset.y) < MagickEpsilon) ? MagickTrue : MagickFalse;
7434 if ((draw_info->linejoin == MiterJoin) ||
7435 ((draw_info->linejoin == RoundJoin) && (closed_path != MagickFalse)))
7436 {
7437 polygon_primitive[number_vertices]=primitive_info[1];
7438 number_vertices++;
7439 }
7440 polygon_primitive[number_vertices].primitive=UndefinedPrimitive;
7441 /*
7442 Compute the slope for the first line segment, p.
7443 */
7444 closed_path=primitive_info[0].closed_subpath;
7445 dx.p=0.0;
7446 dy.p=0.0;
7447 for (n=1; n < (ssize_t) number_vertices; n++)
7448 {
7449 dx.p=polygon_primitive[n].point.x-polygon_primitive[0].point.x;
7450 dy.p=polygon_primitive[n].point.y-polygon_primitive[0].point.y;
7451 if ((fabs(dx.p) >= MagickEpsilon) || (fabs(dy.p) >= MagickEpsilon))
7452 break;
7453 }
7454 if (n == (ssize_t) number_vertices)
7455 {
7456 if ((draw_info->linecap != RoundCap) || (closed_path != MagickFalse))
7457 {
7458 /*
7459 Zero length subpath.
7460 */
7461 stroke_polygon=(PrimitiveInfo *) AcquireCriticalMemory(
7462 sizeof(*stroke_polygon));
7463 stroke_polygon[0]=polygon_primitive[0];
7464 stroke_polygon[0].coordinates=0;
7465 polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(
7466 polygon_primitive);
7467 return(stroke_polygon);
7468 }
7469 n=(ssize_t) number_vertices-1L;
7470 }
7471 extent_p=2*number_vertices;
7472 extent_q=2*number_vertices;
7473 stroke_p=(PointInfo *) AcquireQuantumMemory((size_t) extent_p+MaxStrokePad,
7474 sizeof(*stroke_p));
7475 stroke_q=(PointInfo *) AcquireQuantumMemory((size_t) extent_q+MaxStrokePad,
7476 sizeof(*stroke_q));
7477 if ((stroke_p == (PointInfo *) NULL) || (stroke_q == (PointInfo *) NULL))
7478 {
7479 if (stroke_p != (PointInfo *) NULL)
7480 stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p);
7481 if (stroke_q != (PointInfo *) NULL)
7482 stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q);
7483 polygon_primitive=(PrimitiveInfo *)
7484 RelinquishMagickMemory(polygon_primitive);
7485 (void) ThrowMagickException(exception,GetMagickModule(),
7486 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
7487 return((PrimitiveInfo *) NULL);
7488 }
7489 slope.p=0.0;
7490 inverse_slope.p=0.0;
7491 if (fabs(dx.p) < MagickEpsilon)
7492 {
7493 if (dx.p >= 0.0)
7494 slope.p=dy.p < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
7495 else
7496 slope.p=dy.p < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
7497 }
7498 else
7499 if (fabs(dy.p) < MagickEpsilon)
7500 {
7501 if (dy.p >= 0.0)
7502 inverse_slope.p=dx.p < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
7503 else
7504 inverse_slope.p=dx.p < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
7505 }
7506 else
7507 {
7508 slope.p=dy.p/dx.p;
7509 inverse_slope.p=(-1.0*MagickSafeReciprocal(slope.p));
7510 }
7511 mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
7512 miterlimit=(double) (draw_info->miterlimit*draw_info->miterlimit*mid*mid);
7513 if ((draw_info->linecap == SquareCap) && (closed_path == MagickFalse))
7514 (void) TraceSquareLinecap(polygon_primitive,number_vertices,mid);
7515 offset.x=sqrt((double) (mid*mid/(inverse_slope.p*inverse_slope.p+1.0)));
7516 offset.y=(double) (offset.x*inverse_slope.p);
7517 if ((dy.p*offset.x-dx.p*offset.y) > 0.0)
7518 {
7519 box_p[0].x=polygon_primitive[0].point.x-offset.x;
7520 box_p[0].y=polygon_primitive[0].point.y-offset.x*inverse_slope.p;
7521 box_p[1].x=polygon_primitive[n].point.x-offset.x;
7522 box_p[1].y=polygon_primitive[n].point.y-offset.x*inverse_slope.p;
7523 box_q[0].x=polygon_primitive[0].point.x+offset.x;
7524 box_q[0].y=polygon_primitive[0].point.y+offset.x*inverse_slope.p;
7525 box_q[1].x=polygon_primitive[n].point.x+offset.x;
7526 box_q[1].y=polygon_primitive[n].point.y+offset.x*inverse_slope.p;
7527 }
7528 else
7529 {
7530 box_p[0].x=polygon_primitive[0].point.x+offset.x;
7531 box_p[0].y=polygon_primitive[0].point.y+offset.y;
7532 box_p[1].x=polygon_primitive[n].point.x+offset.x;
7533 box_p[1].y=polygon_primitive[n].point.y+offset.y;
7534 box_q[0].x=polygon_primitive[0].point.x-offset.x;
7535 box_q[0].y=polygon_primitive[0].point.y-offset.y;
7536 box_q[1].x=polygon_primitive[n].point.x-offset.x;
7537 box_q[1].y=polygon_primitive[n].point.y-offset.y;
7538 }
7539 /*
7540 Create strokes for the line join attribute: bevel, miter, round.
7541 */
7542 p=0;
7543 q=0;
7544 stroke_q[p++]=box_q[0];
7545 stroke_p[q++]=box_p[0];
7546 for (i=(ssize_t) n+1; i < (ssize_t) number_vertices; i++)
7547 {
7548 /*
7549 Compute the slope for this line segment, q.
7550 */
7551 dx.q=polygon_primitive[i].point.x-polygon_primitive[n].point.x;
7552 dy.q=polygon_primitive[i].point.y-polygon_primitive[n].point.y;
7553 dot_product=dx.q*dx.q+dy.q*dy.q;
7554 if (dot_product < 0.25)
7555 continue;
7556 slope.q=0.0;
7557 inverse_slope.q=0.0;
7558 if (fabs(dx.q) < MagickEpsilon)
7559 {
7560 if (dx.q >= 0.0)
7561 slope.q=dy.q < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
7562 else
7563 slope.q=dy.q < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
7564 }
7565 else
7566 if (fabs(dy.q) < MagickEpsilon)
7567 {
7568 if (dy.q >= 0.0)
7569 inverse_slope.q=dx.q < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
7570 else
7571 inverse_slope.q=dx.q < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
7572 }
7573 else
7574 {
7575 slope.q=dy.q/dx.q;
7576 inverse_slope.q=(-1.0*MagickSafeReciprocal(slope.q));
7577 }
7578 offset.x=sqrt((double) (mid*mid/(inverse_slope.q*inverse_slope.q+1.0)));
7579 offset.y=(double) (offset.x*inverse_slope.q);
7580 dot_product=dy.q*offset.x-dx.q*offset.y;
7581 if (dot_product > 0.0)
7582 {
7583 box_p[2].x=polygon_primitive[n].point.x-offset.x;
7584 box_p[2].y=polygon_primitive[n].point.y-offset.y;
7585 box_p[3].x=polygon_primitive[i].point.x-offset.x;
7586 box_p[3].y=polygon_primitive[i].point.y-offset.y;
7587 box_q[2].x=polygon_primitive[n].point.x+offset.x;
7588 box_q[2].y=polygon_primitive[n].point.y+offset.y;
7589 box_q[3].x=polygon_primitive[i].point.x+offset.x;
7590 box_q[3].y=polygon_primitive[i].point.y+offset.y;
7591 }
7592 else
7593 {
7594 box_p[2].x=polygon_primitive[n].point.x+offset.x;
7595 box_p[2].y=polygon_primitive[n].point.y+offset.y;
7596 box_p[3].x=polygon_primitive[i].point.x+offset.x;
7597 box_p[3].y=polygon_primitive[i].point.y+offset.y;
7598 box_q[2].x=polygon_primitive[n].point.x-offset.x;
7599 box_q[2].y=polygon_primitive[n].point.y-offset.y;
7600 box_q[3].x=polygon_primitive[i].point.x-offset.x;
7601 box_q[3].y=polygon_primitive[i].point.y-offset.y;
7602 }
7603 if (fabs((double) (slope.p-slope.q)) < MagickEpsilon)
7604 {
7605 box_p[4]=box_p[1];
7606 box_q[4]=box_q[1];
7607 }
7608 else
7609 {
7610 box_p[4].x=(double) ((slope.p*box_p[0].x-box_p[0].y-slope.q*box_p[3].x+
7611 box_p[3].y)/(slope.p-slope.q));
7612 box_p[4].y=(double) (slope.p*(box_p[4].x-box_p[0].x)+box_p[0].y);
7613 box_q[4].x=(double) ((slope.p*box_q[0].x-box_q[0].y-slope.q*box_q[3].x+
7614 box_q[3].y)/(slope.p-slope.q));
7615 box_q[4].y=(double) (slope.p*(box_q[4].x-box_q[0].x)+box_q[0].y);
7616 }
7617 CheckPathExtent(MaxStrokePad,MaxStrokePad);
7618 dot_product=dx.q*dy.p-dx.p*dy.q;
7619 if (dot_product <= 0.0)
7620 switch (draw_info->linejoin)
7621 {
7622 case BevelJoin:
7623 {
7624 stroke_q[q++]=box_q[1];
7625 stroke_q[q++]=box_q[2];
7626 dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7627 (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7628 if (dot_product <= miterlimit)
7629 stroke_p[p++]=box_p[4];
7630 else
7631 {
7632 stroke_p[p++]=box_p[1];
7633 stroke_p[p++]=box_p[2];
7634 }
7635 break;
7636 }
7637 case MiterJoin:
7638 {
7639 dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7640 (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7641 if (dot_product <= miterlimit)
7642 {
7643 stroke_q[q++]=box_q[4];
7644 stroke_p[p++]=box_p[4];
7645 }
7646 else
7647 {
7648 stroke_q[q++]=box_q[1];
7649 stroke_q[q++]=box_q[2];
7650 stroke_p[p++]=box_p[1];
7651 stroke_p[p++]=box_p[2];
7652 }
7653 break;
7654 }
7655 case RoundJoin:
7656 {
7657 dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7658 (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7659 if (dot_product <= miterlimit)
7660 stroke_p[p++]=box_p[4];
7661 else
7662 {
7663 stroke_p[p++]=box_p[1];
7664 stroke_p[p++]=box_p[2];
7665 }
7666 center=polygon_primitive[n].point;
7667 theta.p=atan2(box_q[1].y-center.y,box_q[1].x-center.x);
7668 theta.q=atan2(box_q[2].y-center.y,box_q[2].x-center.x);
7669 if (theta.q < theta.p)
7670 theta.q+=2.0*MagickPI;
7671 arc_segments=(size_t) CastDoubleToLong(ceil((double) ((theta.q-
7672 theta.p)/(2.0*sqrt(MagickSafeReciprocal(mid))))));
7673 CheckPathExtent(MaxStrokePad,arc_segments+MaxStrokePad);
7674 stroke_q[q].x=box_q[1].x;
7675 stroke_q[q].y=box_q[1].y;
7676 q++;
7677 for (j=1; j < (ssize_t) arc_segments; j++)
7678 {
7679 delta_theta=(double) (j*(theta.q-theta.p)/arc_segments);
7680 stroke_q[q].x=(double) (center.x+mid*cos(fmod((double)
7681 (theta.p+delta_theta),DegreesToRadians(360.0))));
7682 stroke_q[q].y=(double) (center.y+mid*sin(fmod((double)
7683 (theta.p+delta_theta),DegreesToRadians(360.0))));
7684 q++;
7685 }
7686 stroke_q[q++]=box_q[2];
7687 break;
7688 }
7689 default:
7690 break;
7691 }
7692 else
7693 switch (draw_info->linejoin)
7694 {
7695 case BevelJoin:
7696 {
7697 stroke_p[p++]=box_p[1];
7698 stroke_p[p++]=box_p[2];
7699 dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7700 (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7701 if (dot_product <= miterlimit)
7702 stroke_q[q++]=box_q[4];
7703 else
7704 {
7705 stroke_q[q++]=box_q[1];
7706 stroke_q[q++]=box_q[2];
7707 }
7708 break;
7709 }
7710 case MiterJoin:
7711 {
7712 dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7713 (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7714 if (dot_product <= miterlimit)
7715 {
7716 stroke_q[q++]=box_q[4];
7717 stroke_p[p++]=box_p[4];
7718 }
7719 else
7720 {
7721 stroke_q[q++]=box_q[1];
7722 stroke_q[q++]=box_q[2];
7723 stroke_p[p++]=box_p[1];
7724 stroke_p[p++]=box_p[2];
7725 }
7726 break;
7727 }
7728 case RoundJoin:
7729 {
7730 dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7731 (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7732 if (dot_product <= miterlimit)
7733 stroke_q[q++]=box_q[4];
7734 else
7735 {
7736 stroke_q[q++]=box_q[1];
7737 stroke_q[q++]=box_q[2];
7738 }
7739 center=polygon_primitive[n].point;
7740 theta.p=atan2(box_p[1].y-center.y,box_p[1].x-center.x);
7741 theta.q=atan2(box_p[2].y-center.y,box_p[2].x-center.x);
7742 if (theta.p < theta.q)
7743 theta.p+=2.0*MagickPI;
7744 arc_segments=(size_t) CastDoubleToLong(ceil((double) ((theta.p-
7745 theta.q)/(2.0*sqrt((double) (MagickSafeReciprocal(mid)))))));
7746 CheckPathExtent(arc_segments+MaxStrokePad,MaxStrokePad);
7747 stroke_p[p++]=box_p[1];
7748 for (j=1; j < (ssize_t) arc_segments; j++)
7749 {
7750 delta_theta=(double) (j*(theta.q-theta.p)/arc_segments);
7751 stroke_p[p].x=(double) (center.x+mid*cos(fmod((double)
7752 (theta.p+delta_theta),DegreesToRadians(360.0))));
7753 stroke_p[p].y=(double) (center.y+mid*sin(fmod((double)
7754 (theta.p+delta_theta),DegreesToRadians(360.0))));
7755 p++;
7756 }
7757 stroke_p[p++]=box_p[2];
7758 break;
7759 }
7760 default:
7761 break;
7762 }
7763 slope.p=slope.q;
7764 inverse_slope.p=inverse_slope.q;
7765 box_p[0]=box_p[2];
7766 box_p[1]=box_p[3];
7767 box_q[0]=box_q[2];
7768 box_q[1]=box_q[3];
7769 dx.p=dx.q;
7770 dy.p=dy.q;
7771 n=i;
7772 }
7773 stroke_p[p++]=box_p[1];
7774 stroke_q[q++]=box_q[1];
7775 /*
7776 Trace stroked polygon.
7777 */
7778 stroke_polygon=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
7779 (p+q+2UL*closed_path+2UL),sizeof(*stroke_polygon));
7780 if (stroke_polygon == (PrimitiveInfo *) NULL)
7781 {
7782 (void) ThrowMagickException(exception,GetMagickModule(),
7783 ResourceLimitError,"MemoryAllocationFailed","`%s'","");
7784 stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p);
7785 stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q);
7786 polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(
7787 polygon_primitive);
7788 return(stroke_polygon);
7789 }
7790 for (i=0; i < (ssize_t) p; i++)
7791 {
7792 stroke_polygon[i]=polygon_primitive[0];
7793 stroke_polygon[i].point=stroke_p[i];
7794 }
7795 if (closed_path != MagickFalse)
7796 {
7797 stroke_polygon[i]=polygon_primitive[0];
7798 stroke_polygon[i].point=stroke_polygon[0].point;
7799 i++;
7800 }
7801 for ( ; i < (ssize_t) (p+q+closed_path); i++)
7802 {
7803 stroke_polygon[i]=polygon_primitive[0];
7804 stroke_polygon[i].point=stroke_q[p+q+closed_path-(i+1)];
7805 }
7806 if (closed_path != MagickFalse)
7807 {
7808 stroke_polygon[i]=polygon_primitive[0];
7809 stroke_polygon[i].point=stroke_polygon[p+closed_path].point;
7810 i++;
7811 }
7812 stroke_polygon[i]=polygon_primitive[0];
7813 stroke_polygon[i].point=stroke_polygon[0].point;
7814 i++;
7815 stroke_polygon[i].primitive=UndefinedPrimitive;
7816 stroke_polygon[0].coordinates=(size_t) (p+q+2*closed_path+1);
7817 stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p);
7818 stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q);
7819 polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(polygon_primitive);
7820 return(stroke_polygon);
7821}
_EdgeInfo
Definition draw.c:113
_ElementInfo
Definition draw.c:137
_MVGInfo
Definition draw.c:147
_PathInfo
Definition draw.c:183
_PolygonInfo
Definition draw.c:165