summaryrefslogtreecommitdiffstats
path: root/src/mesa/main
diff options
context:
space:
mode:
Diffstat (limited to 'src/mesa/main')
-rw-r--r--src/mesa/main/texenvprogram.c86
1 files changed, 53 insertions, 33 deletions
diff --git a/src/mesa/main/texenvprogram.c b/src/mesa/main/texenvprogram.c
index 0c2caa0169e..73681b1a6b2 100644
--- a/src/mesa/main/texenvprogram.c
+++ b/src/mesa/main/texenvprogram.c
@@ -82,9 +82,8 @@ struct texenv_fragment_program {
struct fragment_program *program;
GLcontext *ctx;
- GLuint temp_used_for_txp; /* Temps which have been the result of a texture
- * operation.
- */
+ GLuint alu_temps; /* Track texture indirections, see spec. */
+ GLuint temps_output; /* Track texture indirections, see spec. */
GLuint temp_in_use; /* Tracks temporary regs which are in
* use.
@@ -144,10 +143,9 @@ static struct ureg get_temp( struct texenv_fragment_program *p )
{
int bit;
- /* First try and reuse temps which have been used for texture
- * results:
+ /* First try and reuse temps which have been used already:
*/
- bit = ffs( ~p->temp_in_use & p->temp_used_for_txp );
+ bit = ffs( ~p->temp_in_use & p->alu_temps );
/* Then any unused temporary:
*/
@@ -167,17 +165,17 @@ static struct ureg get_tex_temp( struct texenv_fragment_program *p )
{
int bit;
- /* First try to find availble temp not previously used as a texture
- * result:
+ /* First try to find availble temp not previously used (to avoid
+ * starting a new texture indirection). According to the spec, the
+ * ~p->temps_output isn't necessary, but will keep it there for
+ * now:
*/
- bit = ffs( ~p->temp_in_use & ~p->temp_used_for_txp );
+ bit = ffs( ~p->temp_in_use & ~p->alu_temps & ~p->temps_output );
/* Then any unused temporary:
*/
- if (!bit) {
+ if (!bit)
bit = ffs( ~p->temp_in_use );
- p->program->NumTexIndirections++;
- }
if (!bit) {
fprintf(stderr, "%s: out of temporaries\n", __FILE__);
@@ -185,7 +183,6 @@ static struct ureg get_tex_temp( struct texenv_fragment_program *p )
}
p->temp_in_use |= 1<<(bit-1);
- p->temp_used_for_txp |= 1<<(bit-1);
return make_ureg(PROGRAM_TEMPORARY, (bit-1));
}
@@ -280,6 +277,11 @@ emit_op(struct texenv_fragment_program *p,
emit_dst( &inst->DstReg, dest, mask );
+ /* Accounting for indirection tracking:
+ */
+ if (dest.file == PROGRAM_TEMPORARY)
+ p->temps_output |= 1 << dest.idx;
+
return inst;
}
@@ -295,6 +297,20 @@ static struct ureg emit_arith( struct texenv_fragment_program *p,
{
emit_op(p, op, dest, mask, saturate, src0, src1, src2);
+ /* Accounting for indirection tracking:
+ */
+ if (src0.file == PROGRAM_TEMPORARY)
+ p->alu_temps |= 1 << src0.idx;
+
+ if (!is_undef(src1) && src1.file == PROGRAM_TEMPORARY)
+ p->alu_temps |= 1 << src1.idx;
+
+ if (!is_undef(src2) && src2.file == PROGRAM_TEMPORARY)
+ p->alu_temps |= 1 << src2.idx;
+
+ if (dest.file == PROGRAM_TEMPORARY)
+ p->alu_temps |= 1 << dest.idx;
+
p->program->NumAluInstructions++;
return dest;
}
@@ -319,10 +335,15 @@ static struct ureg emit_texld( struct texenv_fragment_program *p,
p->program->NumTexInstructions++;
- if (coord.file != PROGRAM_INPUT &&
- (coord.idx < FRAG_ATTRIB_TEX0 ||
- coord.idx > FRAG_ATTRIB_TEX7)) {
+ /* Is this a texture indirection?
+ */
+ if ((coord.file == PROGRAM_TEMPORARY &&
+ (p->temps_output & (1<<coord.idx))) ||
+ (dest.file == PROGRAM_TEMPORARY &&
+ (p->alu_temps & (1<<dest.idx)))) {
p->program->NumTexIndirections++;
+ p->temps_output = 0;
+ p->alu_temps = 0;
}
return dest;
@@ -529,7 +550,7 @@ static struct ureg emit_combine( struct texenv_fragment_program *p,
{
int nr = nr_args(mode);
struct ureg src[3];
- struct ureg tmp;
+ struct ureg tmp, half;
int i;
for (i = 0; i < nr; i++)
@@ -549,11 +570,11 @@ static struct ureg emit_combine( struct texenv_fragment_program *p,
src[0], src[1], undef );
case GL_ADD_SIGNED:
/* tmp = arg0 + arg1
- * result = tmp + -.5
+ * result = tmp - .5
*/
- tmp = register_scalar_const(p, .5);
- emit_arith( p, FP_OPCODE_ADD, dest, mask, 0, src[0], src[1], undef );
- emit_arith( p, FP_OPCODE_SUB, dest, mask, saturate, dest, tmp, undef );
+ half = register_scalar_const(p, .5);
+ emit_arith( p, FP_OPCODE_ADD, tmp, mask, 0, src[0], src[1], undef );
+ emit_arith( p, FP_OPCODE_SUB, dest, mask, saturate, tmp, half, undef );
return dest;
case GL_INTERPOLATE:
/* Arg0 * (Arg2) + Arg1 * (1-Arg2) -- note arguments are reordered:
@@ -594,16 +615,6 @@ static struct ureg emit_combine( struct texenv_fragment_program *p,
}
}
-static struct ureg get_dest( struct texenv_fragment_program *p, int unit )
-{
- if (p->ctx->_TriangleCaps & DD_SEPARATE_SPECULAR)
- return get_temp( p );
- else if (unit != p->last_tex_stage)
- return get_temp( p );
- else
- return make_ureg(PROGRAM_OUTPUT, FRAG_OUTPUT_COLR);
-}
-
static struct ureg emit_texenv( struct texenv_fragment_program *p, int unit )
@@ -612,7 +623,7 @@ static struct ureg emit_texenv( struct texenv_fragment_program *p, int unit )
GLuint saturate = (unit < p->last_tex_stage);
GLuint rgb_shift, alpha_shift;
struct ureg out, shift;
- struct ureg dest = get_dest(p, unit);
+ struct ureg dest;
if (!texUnit->_ReallyEnabled) {
return get_source(p, GL_PREVIOUS, 0);
@@ -635,6 +646,15 @@ static struct ureg emit_texenv( struct texenv_fragment_program *p, int unit )
break;
}
+ /* If this is the very last calculation, emit direct to output reg:
+ */
+ if ((p->ctx->_TriangleCaps & DD_SEPARATE_SPECULAR) ||
+ unit != p->last_tex_stage ||
+ alpha_shift ||
+ rgb_shift)
+ dest = get_temp( p );
+ else
+ dest = make_ureg(PROGRAM_OUTPUT, FRAG_OUTPUT_COLR);
/* Emit the RGB and A combine ops
*/
@@ -734,7 +754,7 @@ void _mesa_UpdateTexEnvProgram( GLcontext *ctx )
p.program->Parameters = _mesa_new_parameter_list();
p.program->InputsRead = 0;
- p.program->OutputsWritten = 0;
+ p.program->OutputsWritten = 1 << FRAG_OUTPUT_COLR;
p.src_texture = undef;
p.src_previous = undef;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 13:34:10 +0000