Thread: Blend problem
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Old 11-21-06, 08:50 AM   #1
JeroenH
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Join Date: Nov 2006
Posts: 2
Default Blend problem

Hi,

I use glBlendColor (0,0,0,1) to set the alpha value to 1. Then i do a glBlendFunc (GL_CONSTANT_ALPHA, GL_ONE_MINUS_CONSTANT_ALPHA).

However the glBlendColor does not really set the alpha value. When i read it out after the call to glBlendColor, it is still 0. Therefore I see no image on the screen when I do a glDrawPixels(..) (because the src var of glBlendFunc = 0 and the dst var = 1, so the image to draw is complete transparent).

Does anyone know this problem, or has a solution for it ?

Grtz,
Jeroen.
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