OpenHarmony/third_party_mesa3d
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Don't always declare frag shader INPUT[0] as fragment position.

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We were doing this for the sake of softpipe and the tgsi intergrepter since
we always need the fragment position and W-coordinate information in order
to compute fragment interpolants.
But that's not appropriate for hardware drivers.
The tgsi interpreter now get x,y,w information from a separate tgsi_exec_vector
variable setup by softpipe.
The new pipe_shader_state->input_map[] defines how vert shader outputs map
to frag shader inputs.  It may go away though, since one can also examine
the semantic label on frag shader input[0] to figure things out.
This commit is contained in:
Brian
2007-12-14 11:00:46 -07:00
parent 23e36c2dfb
commit e785f190f0
12 changed files with 323 additions and 229 deletions
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25
src/mesa/state_tracker/st_program.c
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@@ -47,7 +47,7 @@
#include "st_mesa_to_tgsi.h"
#define TGSI_DEBUG 0
#define TGSI_DEBUG 01
/**
@@ -283,16 +283,17 @@ st_translate_fragment_program(struct st_context *st,
const struct cso_fragment_shader *cso;
GLuint interpMode[16]; /* XXX size? */
GLuint attr;
GLbitfield inputsRead = stfp->Base.Base.InputsRead;
/* For software rendering, we always need the fragment input position
* in order to calculate interpolated values.
* For i915, we always want to emit the semantic info for position.
*/
inputsRead |= FRAG_BIT_WPOS;
const GLbitfield inputsRead = stfp->Base.Base.InputsRead;
GLuint vslot = 0;
memset(&fs, 0, sizeof(fs));
/* which vertex output goes to the first fragment input: */
if (inputsRead & FRAG_BIT_WPOS)
vslot = 0;
else
vslot = 1;
/*
* Convert Mesa program inputs to TGSI input register semantics.
*/
@@ -300,15 +301,17 @@ st_translate_fragment_program(struct st_context *st,
if (inputsRead & (1 << attr)) {
const GLuint slot = fs.num_inputs;
fs.num_inputs++;
defaultInputMapping[attr] = slot;
fs.input_map[slot] = vslot++;
fs.num_inputs++;
switch (attr) {
case FRAG_ATTRIB_WPOS:
fs.input_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
fs.input_semantic_index[slot] = 0;
interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
break;
case FRAG_ATTRIB_COL0:
fs.input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;