WGL: WGL_ARB_render_texture speedup
thunderbird2k at gmx.net
Sun Jul 29 07:18:26 CDT 2007
This patch greatly improves the performance of WGL_ARB_render_texture. Before
I used glReadPixels to copy data from the pbuffer to system memory, later on
I copied it back to a texture. I knew the real solution was the use of
glCopyTexImage2D (which saves the gpu->cpu->gpu copying) but I wasn't able to
get it working partly due to some bugs in the old pbuffer code.
The new code is a lot faster. Some demos have become 5x faster or more! All
demos still work.
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