Blend mode: Linear-dodge in php

[gormonn]

Hello!
To composite images i use:

Code: Select all

$canvas->compositeimage($image, Imagick::COMPOSITE_MULTIPLY, 10, 150);

http://php.net/manual/ru/imagick.compositeimage.php

How to use that with blend mode "Linear-dodge"?

[fmw42]

Moved to Imagick forum

[gormonn]

sorry, misunderstood

[fmw42]

Apparently, from http://us3.php.net/manual/en/imagick.co ... ompositeop, they did not implement linear_dodge. Imagick is not well maintained and does not have all the options in Imagemagick. You may have to use PHP exec() to do that.

[fmw42]

sorry, misunderstood

This is the specific forum dedicated to Imagick

[fmw42]

The closest I see is colordodge. You could try that. Otherwise, use PHP exec() with the command line version of the code you want to implement.

[fmw42]

According to http://www.imagemagick.org/Usage/compose/#lineardodge, it is the same as -compose plus, except for partially transparent pixels.

[gormonn]

Hmm... okay... but imageck haven't constant with that blend mode:
http://php.net/manual/ru/imagick.constants.php

That is why I asked a question there.
I do not understand how to write the correct command.
I tried to understand anything from the documentation, but did not understand, and therefore do nothing at random to failed:

Code: Select all

$cmd = convert '.$result.' img/ach/mozg4.png -compose linear-dodge -define compose:args=100,0 -composite img.png';
exec($cmd);

[gormonn]

According to http://www.imagemagick.org/Usage/compose/#lineardodge, it is the same as -compose plus, except for partially transparent pixels.

Hmm... ok, Thank you! i'l try it!

[fmw42]

Yes, that is correct. Imagick does NOT have that mode. So you have two choices.

1) try using COMPOSITE_PLUS
2) use PHP exec()

-define compose:args=100,0

That will choose one or the other image. So it will do nothing useful. You would have to use some mix, such as 50,50.

[gormonn]

COMPOSITE_PLUS helped!
Thank you so much, fmw42! Or how you real name? Fred?
You saved me from sleepless nights!
Happiness and success to you!