wined3d: Emulate clipplanes in ARB if the NV extensions are not available.

This patch tries to find a free texture coordinate to load up to 4 clip coordinates into the pixel shader, and uses KIL to throw away fragments that are cut by a clipplane. If no free texture coordinate is found, clipping is not done. If more than 4 clipplanes are used, only the first 4 are actually enabled. That should be pretty rare though.

wined3d: Emulate clipplanes in ARB if the NV extensions are not available.
b2f09fd2 · Stefan Doesinger · Alexandre Julliard · 7baf7c65 · b2f09fd2
Commit b2f09fd2 authored Jun 17, 2009 by Stefan Doesinger Committed by Alexandre Julliard Jun 19, 2009
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arb_program_shader.c dlls/wined3d/arb_program_shader.c +125 -13

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--- a/dlls/wined3d/arb_program_shader.c
+++ b/dlls/wined3d/arb_program_shader.c