--TheGoop
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Clearing the backbuffer QUICK in DX7
No, I dont think there is a betterway then the blit color fill. Clearing the backbuffer is just inherintely slow because there is so much space to fill. The best advice I can give you is just to avoid screen clears.
If you're targeting 3D accelerated computers, you could always try drawing a screen-sized polygon of the desired color.
What is the fastest was to clear the backbuffer? In the SDK documentation, it says the bltcolorfill is a "quick way to erase a background", but it shaved about 5 fps off my total in some tests. Is there a better way to do this?
This is all D3D-specific.
The quickest way should be the IDirect3DDevice7::Clear() method.
This is the preferred way of clearing the render target, so driver-writers will (or at least should) optimize this for their particular card.
Some cards have special rendertarget-clearing hardware, others use their triangle-rendering hardware to clear the backbuffer. Whichever is optimal for the hardware is what is probably implemented.
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