Bitwise operators and native integer support are only available in PS
4.0 (DX10 only).
Also, recall that pixel shaders do not have direct access to the
destination pixels, so readback to a VRAM texture is still required (and
even that can be slow, not as bad as VRAM->sysmem, but still slow).
Chris
[EMAIL PROTECTED] wrote:
Wouldn't it be possible to accalerate XOR with shaders?
Although bit-operations are not supported as far as I know, couldn't they be
emulated with integer instructions? Should still be way faster than the current
readback+upload approach.
lg Clemens
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