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[speeder]

I want to make a OpenGL fixed function fullscreen blur, but I am failing to figure how to copy textures within OpenGL (I am using ClanLIB too)

My logic  (that I fail to implement) is:

Render screen to "texture A"
copy "texture A" scaled down to "texture B"
copy "texture B" alpha blended and scaled up back on "texture A"

[Polly]

You probably want to use either glGetTexImage or glCopyTexSubImage2D. Or use the Accumulation Buffer