PF_RGB -> PF_A8 -> GL_ALPHA

BlitzMax Forums/BlitzMax Programming/PF_RGB -> PF_A8 -> GL_ALPHA

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Leadwerks
 #1
I want to load a pixmap in any format, convert the pixels to an PF_A8 alpha map, based on pixel brightness, and then create a GL_ALPHA texture from that.

Can someone explain how this works? Thank you.


PF_RGBA8888 -> PF_A8 -> GL_ALPHA does work, BTW, so it seems the faulty step is in converting RGB888 and I8 to A8.