diff options
| author | Marek Olšák <marek.olsak@amd.com> | 2014-10-16 16:21:54 +0200 |
|---|---|---|
| committer | Marek Olšák <marek.olsak@amd.com> | 2014-10-21 22:01:16 +0200 |
| commit | 9ec305ead7750c7f91c79b043584c1997bacd9a7 (patch) | |
| tree | 40711b45a068fab073286a231f149a2e1e6f31f7 /src | |
| parent | e8764a46731aaa20d6c7bc98d227e1a94fafbf5b (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 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 14 |
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. |