Icon-Compositor 0.0
How to change an icon's color
One method of changing an icon's color may be found in a
combination of the monochrome function and the multiply operator, but
that can look a little flat. It loses the shadows and
highlights. To calculate an overlay which contains the
highlights and shadows, we want the difference between the
image and its average.
This doesn't look like much yet, until we put it over the top of a solid
color...
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icomp '(
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change_color_icon_overlay.png |
over |
red |
) | masked_by( |
dragon.png * 0 |
)' -o |
change_icon_color_red.png |
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This can all be done in a single script file, with no temporary
overlay file, like this:
d = dragon.png;
ov = difference(d, pixel_average(d), 10);
mk = d * 0;
(ov over red) | masked_by(mk)
You can use this technique to generate icons of about 16 million
other colors... 
See Also
difference, masked_by, monochrome, multiply, over, pixel_average,
