diff options
| -rw-r--r-- | src/mesa/main/texenvprogram.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/mesa/main/texenvprogram.c b/src/mesa/main/texenvprogram.c index 3736138b9ed..847db5cfb64 100644 --- a/src/mesa/main/texenvprogram.c +++ b/src/mesa/main/texenvprogram.c @@ -1113,7 +1113,7 @@ static struct ureg emit_texenv(struct texenv_fragment_program *p, GLuint unit) { struct state_key *key = p->state; - GLboolean saturate = (unit < p->last_tex_stage); + GLboolean saturate; GLuint rgb_shift, alpha_shift; struct ureg out, shift; struct ureg dest; @@ -1141,6 +1141,11 @@ emit_texenv(struct texenv_fragment_program *p, GLuint unit) break; } + /* If we'll do rgb/alpha shifting don't saturate in emit_combine(). + * We don't want to clamp twice. + */ + saturate = !(rgb_shift || alpha_shift); + /* If this is the very last calculation, emit direct to output reg: */ if (key->separate_specular || @@ -1189,6 +1194,7 @@ emit_texenv(struct texenv_fragment_program *p, GLuint unit) /* Deal with the final shift: */ if (alpha_shift || rgb_shift) { + saturate = GL_TRUE; /* always saturate at this point */ if (rgb_shift == alpha_shift) { shift = register_scalar_const(p, (GLfloat)(1<<rgb_shift)); } |