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_atom_shader.c
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@@ -151,8 +151,7 @@ find_translated_vp(struct st_context *st,
{
static const GLuint UNUSED = ~0;
struct translated_vertex_program *xvp;
const GLbitfield fragInputsRead
= stfp->Base.Base.InputsRead | FRAG_BIT_WPOS;
const GLbitfield fragInputsRead = stfp->Base.Base.InputsRead;
/*
* Translate fragment program if needed.
@@ -206,6 +205,7 @@ find_translated_vp(struct st_context *st,
if (xvp->serialNo != stvp->serialNo) {
GLuint outAttr, dummySlot;
const GLbitfield outputsWritten = stvp->Base.Base.OutputsWritten;
GLuint numVpOuts = 0;
/* Compute mapping of vertex program outputs to slots, which depends
* on the fragment program's input->slot mapping.
@@ -214,11 +214,24 @@ find_translated_vp(struct st_context *st,
/* set default: */
xvp->output_to_slot[outAttr] = UNUSED;
if (outputsWritten & (1 << outAttr)) {
if (outAttr == VERT_RESULT_HPOS) {
/* always put xformed position into slot zero */
xvp->output_to_slot[VERT_RESULT_HPOS] = 0;
numVpOuts++;
}
else if (outputsWritten & (1 << outAttr)) {
/* see if the frag prog wants this vert output */
GLint fpIn = vp_out_to_fp_in(outAttr);
if (fpIn >= 0) {
xvp->output_to_slot[outAttr] = stfp->input_to_slot[fpIn];
GLint fpInAttrib = vp_out_to_fp_in(outAttr);
if (fpInAttrib >= 0) {
GLuint fpInSlot = stfp->input_to_slot[fpInAttrib];
GLuint vpOutSlot = stfp->fs->state.input_map[fpInSlot];
xvp->output_to_slot[outAttr] = vpOutSlot;
numVpOuts++;
}
else if (outAttr == VERT_RESULT_BFC0 ||
outAttr == VERT_RESULT_BFC1) {
/* backface colors go into last slots */
xvp->output_to_slot[outAttr] = numVpOuts++;
}
}
}