On Feb 17, 2005, at 11:32 PM, David Niemeijer wrote:
Is there a way I can use quartz to colorize a bitmap image? Or, if
not, is there a non-QD way to do that with Carbon or cocoa calls?
One thing that may do what you want is an image mask. Instead of
creating a regular image with your bitmap data, create a mask image
(e.g., CGImageMaskCreate). When you draw a mask image, the context's
current fill color will be used where ever you have colored pixels in
the mask. In some cases you may have to invert the mask to get the
result you want. You can do this by supplying an inverted decode array
when creating the image (e.g., float decode[] = {1.0, 0.0}).
Regards,
Nick Nallick
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