My setup:
- NVIDIA Quadro p6000 (used for GPUDirect)
- AJA video card (SDI feed from camera and SDI output to the TV)
I am trying to figure out what is the purpose of GPUDirect (in my specific case) if I can achieve the same amount of copying and the same performance using glTexSubImage2D() to fill the GPU texture with any system memory and glGetTextureImageEXT() to get the texture data from the GPU back to any part of system memory.