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authorMarek Olšák <[email protected]>2014-10-16 16:21:54 +0200
committerMarek Olšák <[email protected]>2014-10-21 22:01:16 +0200
commit9ec305ead7750c7f91c79b043584c1997bacd9a7 (patch)
tree40711b45a068fab073286a231f149a2e1e6f31f7
parente8764a46731aaa20d6c7bc98d227e1a94fafbf5b (diff)
glsl_to_tgsi: fix the value of gl_FrontFacing with native integers
We must convert it to boolean from the DX9 float encoding that Gallium specifies. Later, we should probably define that FACE should be 0 or ~0 if native integers are supported. Cc: 10.2 10.3 <[email protected]> Reviewed-by: Eric Anholt <[email protected]>
-rw-r--r--src/mesa/state_tracker/st_glsl_to_tgsi.cpp14
1 files changed, 9 insertions, 5 deletions
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index a0da9f6353c..21f4cb8cbe2 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -4781,15 +4781,19 @@ emit_wpos(struct st_context *st,
* saturating the value to [0,1] does the job.
*/
static void
-emit_face_var(struct st_translate *t)
+emit_face_var(struct gl_context *ctx, struct st_translate *t)
{
struct ureg_program *ureg = t->ureg;
struct ureg_dst face_temp = ureg_DECL_temporary(ureg);
struct ureg_src face_input = t->inputs[t->inputMapping[VARYING_SLOT_FACE]];
- /* MOV_SAT face_temp, input[face] */
- face_temp = ureg_saturate(face_temp);
- ureg_MOV(ureg, face_temp, face_input);
+ if (ctx->Const.NativeIntegers) {
+ ureg_FSGE(ureg, face_temp, face_input, ureg_imm1f(ureg, 0));
+ }
+ else {
+ /* MOV_SAT face_temp, input[face] */
+ ureg_MOV(ureg, ureg_saturate(face_temp), face_input);
+ }
/* Use face_temp as face input from here on: */
t->inputs[t->inputMapping[VARYING_SLOT_FACE]] = ureg_src(face_temp);
@@ -4909,7 +4913,7 @@ st_translate_program(
}
if (proginfo->InputsRead & VARYING_BIT_FACE)
- emit_face_var(t);
+ emit_face_var(ctx, t);
/*
* Declare output attributes.