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authorMarek Olšák <maraeo@gmail.com>2010-05-08 05:26:31 +0200
committerMarek Olšák <maraeo@gmail.com>2010-05-08 23:03:45 +0200
commite812c0439cc6a6ee7b0cda33d30dc5cbc9159733 (patch)
tree0384b4fa7fed631c76ba1c29bfc9878b5317c99c /src/mesa/drivers/dri/r300/compiler
parent35a6df573090e31d9eb921d6863b0939458f880c (diff)
r300/compiler: fake equal/notequal for shadow samplers
This is actually better than a real implementation, which would be useless due to inaccuracy (I know because I've tried to implement it).
Diffstat (limited to 'src/mesa/drivers/dri/r300/compiler')
-rw-r--r--src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c b/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c
index f7c54d0fe8..53154f7fbb 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c
@@ -162,6 +162,13 @@ int radeonTransformTEX(
inst_mad->U.I.SrcReg[tex].Index = tmp_texsample;
inst_mad->U.I.SrcReg[tex].Swizzle = compiler->state.unit[inst->U.I.TexSrcUnit].depth_texture_swizzle;
+ /* Fake EQUAL/NOTEQUAL, it seems to pass some tests suprisingly. */
+ if (comparefunc == RC_COMPARE_FUNC_EQUAL) {
+ comparefunc = RC_COMPARE_FUNC_GEQUAL;
+ } else if (comparefunc == RC_COMPARE_FUNC_NOTEQUAL) {
+ comparefunc = RC_COMPARE_FUNC_LESS;
+ }
+
/* Recall that SrcReg[0] is r, SrcReg[tex] is tex and:
* LESS: r < tex <=> -tex+r < 0
* GEQUAL: r >= tex <=> not (-tex+r < 0)