Yes, I know a shader can do it. I was just wondering if there was a way to do it without a shader. I'm already using OpenGL, and this is entirely in memory.
Alan Wolfe wrote:
are you going to save it again to memory or just display it?im not much of a graphics programmer but how about a pixel shader that took both your source texture and a 1x256 texture.Since all the colors are the same you could use the Red component of your source image as a texture index into your 1x256 color (basically the 1x256 would act as your color lookup table).Render this to a texture, and then bam you have your texture to re-use. Or, if the cost of doing this in real time isn't too bad, you could just have your shader do this translation each frame.What you think?
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