Hi Bert,
I have quite a hard time understanding how to use color maps. And I really did not find any helpful documentation on them for Squeak.
One example I found in the image is in BitBlt class>>exampleColorMap. But I don't know how to use it with a Form/BitBlt, well, and what the heck they are actually doing there... In most occasions they used the Bitmap class instead of ColorMap and I couldn't find anything to convert.
Could you provide a simple code example on how to modify the color map of a Form? Or any other pointers....
Thanks a lot, Matthias
Am Sat, 22 Nov 2008 01:58:33 +0100 schrieb Bert Freudenberg bert@freudenbergs.de:
On 22.11.2008, at 01:15, Matthias Korn wrote:
Hi,
thanks for your hints. I also found ColorForm>>replaceColor:with: which does what you describe. But it is unfortunately not what I was looking for. I wasn't very clear in my original post:
I (now) have a gray-scale image which I want to colorize, that is I want to change the hue of the image and not just replace a color with another (or floodfill for that matter).
Hope you guys have some ideas. I tried searching with the Method Finder, but my poor english didn't take me very far.
Use a color map. Your grayscale image could be 8 bits, so with a 256 entries palette you can map that to any color(s) you want. Color maps are used in ColorForm, or directly with BitBlt.
- Bert -
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