Double buffer rendering on DX and GL - (4.3?) #1366
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use DXGI_SWAP_EFFECT_FLIP_DISCARD for the swapeffect buffer count to 2, 3 when vsync is on (recommended setup but can tune this)
set shader model for opengl devices (going to be needed later for shader editor)
marauder2k7
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DX Changes
use DXGI_SWAP_EFFECT_FLIP_DISCARD for the swapeffect
buffer count to 2, 3 when vsync is on (recommended setup but can tune this)
prevBackBuffer added to gfxd3d11windowTarget to swap to for postfx or targets etc.
GL Changes
use SDL window in double buffered mode
dynamic version picking (minimum of 3.3)
TODO: pointer to previous buffer render.