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[directx9] asynchronous gpu pixel upload


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#1 punkcoders   Members   -  Reputation: 137

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Posted 19 September 2013 - 07:45 AM

Hello,

 

I'm working on procedural surfaces and textures (software rendering)

 

I've tested several ways to do it ( texture with DYNAMIC_USAGE, backbuffer with DONOTWAIT in LockRect() function, updateTexture() / updateSurface()... )

 

Whatever approach i use, i have cpu-cycles-spoiling, seems that the cpu is looping waiting gpu has finished copying the pixels.

 

I found in openGL a tool made to avoid this cpu-spoil (Pixel Buffer Object) based on a double-buffer, so cpu doesn't need to wait the end of copy... i'd like to do the equivalent in directx.



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