Legacy ImageMagick Discussions Archive

additional info:

Quantum is defined in: /usr/include/ImageMagick-6/magick/magick-type.h
58 typedef ssize_t SignedQuantum;
59 #if defined(MAGICKCORE_HDRI_SUPPORT)
60 typedef float Quantum;
61 #define QuantumRange 255.0
62 #define QuantumFormat "%g"
63 #else
64 typedef unsigned char Quantum ...

hello again to the forum,

I'm trying to extract the ColorMapIndex of a PNG-/GIF-image for any seperate pixel. received help on my last question - it was possible to read the index for some special produced png-images - but it doesn't work in general.

asuming the "MagickGetImageColors(wand ...

thank you for reply ... I didn't recognized that function so far.

it seems to work with a testimage.PNG produced by convert :D but the same testimage formated as a GIF - it doesn't (using a palette with only 7 colors).

IndexPacket PixelGetIndex(const PixelWand *wand)

as i mentioned the ...

hi,
unluckely I'm a complete newbe using the magickwand within c-lang. first of all my magickwand-version is the debian-sid (8:6.8.9.9-7.2)

I tried to generate a small test image with 3 colors in it.
$ convert -size 4x4 xc:red xc:green xc:blue +append a.png
$ identify -format "%k %wx%h %f\n" a.png ...