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Thanks everyone for your suggestions.As for changing image colors, you could do that with imlib2 as well... though maybe pixel by pixel. The probalem you may run into is if they have anti-aliased text, which will make wholesale color-swapping difficult.
Using one of the libraries recommended, I believe I can walk the directory, load each gif image and then loop through each pixel, changing all solid colors from e.g. blue (0,0,255) to green (0,255,00) .
But, as Anthony pointed out, I will have the problem of the text being antialiased.
So if I have a blue button with yellow text, I know how to transform the blue and yellow to what I want, but I'll also have a gradient of pixels surrounding them with colors in between blue and yellow.
Is there a way to figure out what the yellowish or blueish antialiasing pixels should map to in the new graphic?
Would I have to dig down deep into understanding antialiasing algorithms, or is there a simpler way to use something like a color wheel/whatever it's RGB analog would be?
John Sequeira http://radio.weblogs.com/0103492/
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