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authorMarek Olšák <[email protected]>2011-03-08 07:36:40 +0100
committerMarek Olšák <[email protected]>2011-03-08 07:36:40 +0100
commit4dfcf3c4fe6edd1785348f4f6fc1ef0af2fff6f6 (patch)
tree5d5ebc83068a4f6c53aceeb73011bf386838e478 /src/mesa/drivers/dri/r300
parent94818d4c6ac6585f6b036f9a8bf550f73b7ae4b4 (diff)
r300/compiler: fix equal and notequal shadow compare functions
Diffstat (limited to 'src/mesa/drivers/dri/r300')
-rw-r--r--src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c34
1 files changed, 16 insertions, 18 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 a58ef06b86f..33f9b066976 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c
@@ -33,14 +33,14 @@
/* Series of transformations to be done on textures. */
static struct rc_src_register shadow_ambient(struct r300_fragment_program_compiler *compiler,
- int tmu)
+ int tmu)
{
struct rc_src_register reg = { 0, };
if (compiler->enable_shadow_ambient) {
reg.File = RC_FILE_CONSTANT;
reg.Index = rc_constants_add_state(&compiler->Base.Program.Constants,
- RC_STATE_SHADOW_AMBIENT, tmu);
+ RC_STATE_SHADOW_AMBIENT, tmu);
reg.Swizzle = RC_SWIZZLE_WWWW;
} else {
reg.File = RC_FILE_NONE;
@@ -137,13 +137,6 @@ int radeonTransformTEX(
(compiler->state.unit[inst->U.I.TexSrcUnit].compare_mode_enabled))) {
rc_compare_func comparefunc = compiler->state.unit[inst->U.I.TexSrcUnit].texture_compare_func;
- /* Fake EQUAL/NOTEQUAL, they are equal to NEVER/ALWAYS due to precision issues anyway. */
- if (comparefunc == RC_COMPARE_FUNC_EQUAL) {
- comparefunc = RC_COMPARE_FUNC_NEVER;
- } else if (comparefunc == RC_COMPARE_FUNC_NOTEQUAL) {
- comparefunc = RC_COMPARE_FUNC_ALWAYS;
- }
-
if (comparefunc == RC_COMPARE_FUNC_NEVER || comparefunc == RC_COMPARE_FUNC_ALWAYS) {
inst->U.I.Opcode = RC_OPCODE_MOV;
@@ -157,7 +150,7 @@ int radeonTransformTEX(
return 1;
} else {
struct rc_instruction * inst_rcp = NULL;
- struct rc_instruction *inst_mul, *inst_cmp, *inst_add;
+ struct rc_instruction *inst_mul, *inst_add, *inst_cmp, *inst_cmp2, *inst_mul2;
unsigned tmp_texsample;
unsigned tmp_sum;
int pass, fail;
@@ -212,22 +205,27 @@ int radeonTransformTEX(
inst_add->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_WWWW;
inst_add->U.I.SrcReg[1].File = RC_FILE_TEMPORARY;
inst_add->U.I.SrcReg[1].Index = tmp_texsample;
- inst_add->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_WWWW;
+ inst_add->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_XXXX;
- /* Recall that SrcReg[0] is r, SrcReg[tex] is tex and:
+ /* Note that SrcReg[0] is r, SrcReg[1] is tex and:
* LESS: r < tex <=> -tex+r < 0
* GEQUAL: r >= tex <=> not (-tex+r < 0)
* GREATER: r > tex <=> tex-r < 0
* LEQUAL: r <= tex <=> not ( tex-r < 0)
- *
- * This negates either r or tex: */
- if (comparefunc == RC_COMPARE_FUNC_LESS || comparefunc == RC_COMPARE_FUNC_GEQUAL)
+ * EQUAL: GEQUAL
+ * NOTEQUAL:LESS
+ */
+
+ /* This negates either r or tex: */
+ if (comparefunc == RC_COMPARE_FUNC_LESS || comparefunc == RC_COMPARE_FUNC_GEQUAL ||
+ comparefunc == RC_COMPARE_FUNC_EQUAL || comparefunc == RC_COMPARE_FUNC_NOTEQUAL)
inst_add->U.I.SrcReg[1].Negate = inst_add->U.I.SrcReg[1].Negate ^ RC_MASK_XYZW;
else
inst_add->U.I.SrcReg[0].Negate = inst_add->U.I.SrcReg[0].Negate ^ RC_MASK_XYZW;
/* This negates the whole expresion: */
- if (comparefunc == RC_COMPARE_FUNC_LESS || comparefunc == RC_COMPARE_FUNC_GREATER) {
+ if (comparefunc == RC_COMPARE_FUNC_LESS || comparefunc == RC_COMPARE_FUNC_GREATER ||
+ comparefunc == RC_COMPARE_FUNC_NOTEQUAL) {
pass = 1;
fail = 2;
} else {
@@ -241,8 +239,8 @@ int radeonTransformTEX(
inst_cmp->U.I.SrcReg[0].File = RC_FILE_TEMPORARY;
inst_cmp->U.I.SrcReg[0].Index = tmp_sum;
inst_cmp->U.I.SrcReg[0].Swizzle =
- combine_swizzles(RC_SWIZZLE_WWWW,
- compiler->state.unit[inst->U.I.TexSrcUnit].depth_texture_swizzle);
+ combine_swizzles(RC_SWIZZLE_WWWW,
+ compiler->state.unit[inst->U.I.TexSrcUnit].depth_texture_swizzle);
inst_cmp->U.I.SrcReg[pass].File = RC_FILE_NONE;
inst_cmp->U.I.SrcReg[pass].Swizzle = RC_SWIZZLE_1111;
inst_cmp->U.I.SrcReg[fail] = shadow_ambient(compiler, inst->U.I.TexSrcUnit);