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/*
* Copyright 2017 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "tgsi/tgsi_from_mesa.h"
#include "pipe/p_compiler.h"
/**
* Determine the semantic index that is used when the given varying is mapped
* to TGSI_SEMANTIC_GENERIC.
*/
unsigned
tgsi_get_generic_gl_varying_index(gl_varying_slot attr,
bool needs_texcoord_semantic)
{
if (attr >= VARYING_SLOT_VAR0) {
if (needs_texcoord_semantic)
return attr - VARYING_SLOT_VAR0;
else
return 9 + (attr - VARYING_SLOT_VAR0);
}
if (attr == VARYING_SLOT_PNTC) {
assert(!needs_texcoord_semantic);
return 8;
}
if (attr >= VARYING_SLOT_TEX0 && attr <= VARYING_SLOT_TEX7) {
assert(!needs_texcoord_semantic);
return attr - VARYING_SLOT_TEX0;
}
assert(0);
return 0;
}
/**
* Determine the semantic name and index used for the given varying.
*/
void
tgsi_get_gl_varying_semantic(gl_varying_slot attr,
bool needs_texcoord_semantic,
unsigned *semantic_name,
unsigned *semantic_index)
{
switch (attr) {
case VARYING_SLOT_POS:
*semantic_name = TGSI_SEMANTIC_POSITION;
*semantic_index = 0;
break;
case VARYING_SLOT_COL0:
*semantic_name = TGSI_SEMANTIC_COLOR;
*semantic_index = 0;
break;
case VARYING_SLOT_COL1:
*semantic_name = TGSI_SEMANTIC_COLOR;
*semantic_index = 1;
break;
case VARYING_SLOT_BFC0:
*semantic_name = TGSI_SEMANTIC_BCOLOR;
*semantic_index = 0;
break;
case VARYING_SLOT_BFC1:
*semantic_name = TGSI_SEMANTIC_BCOLOR;
*semantic_index = 1;
break;
case VARYING_SLOT_FOGC:
*semantic_name = TGSI_SEMANTIC_FOG;
*semantic_index = 0;
break;
case VARYING_SLOT_PSIZ:
*semantic_name = TGSI_SEMANTIC_PSIZE;
*semantic_index = 0;
break;
case VARYING_SLOT_CLIP_DIST0:
*semantic_name = TGSI_SEMANTIC_CLIPDIST;
*semantic_index = 0;
break;
case VARYING_SLOT_CLIP_DIST1:
*semantic_name = TGSI_SEMANTIC_CLIPDIST;
*semantic_index = 1;
break;
case VARYING_SLOT_CULL_DIST0:
case VARYING_SLOT_CULL_DIST1:
/* these should have been lowered by GLSL */
assert(0);
break;
case VARYING_SLOT_EDGE:
*semantic_name = TGSI_SEMANTIC_EDGEFLAG;
*semantic_index = 0;
break;
case VARYING_SLOT_CLIP_VERTEX:
*semantic_name = TGSI_SEMANTIC_CLIPVERTEX;
*semantic_index = 0;
break;
case VARYING_SLOT_LAYER:
*semantic_name = TGSI_SEMANTIC_LAYER;
*semantic_index = 0;
break;
case VARYING_SLOT_VIEWPORT:
*semantic_name = TGSI_SEMANTIC_VIEWPORT_INDEX;
*semantic_index = 0;
break;
case VARYING_SLOT_PNTC:
*semantic_name = TGSI_SEMANTIC_PCOORD;
*semantic_index = 0;
break;
case VARYING_SLOT_TEX0:
case VARYING_SLOT_TEX1:
case VARYING_SLOT_TEX2:
case VARYING_SLOT_TEX3:
case VARYING_SLOT_TEX4:
case VARYING_SLOT_TEX5:
case VARYING_SLOT_TEX6:
case VARYING_SLOT_TEX7:
if (needs_texcoord_semantic) {
*semantic_name = TGSI_SEMANTIC_TEXCOORD;
*semantic_index = attr - VARYING_SLOT_TEX0;
break;
}
/* fall through */
case VARYING_SLOT_VAR0:
default:
assert(attr >= VARYING_SLOT_VAR0 ||
(attr >= VARYING_SLOT_TEX0 && attr <= VARYING_SLOT_TEX7));
*semantic_name = TGSI_SEMANTIC_GENERIC;
*semantic_index =
tgsi_get_generic_gl_varying_index(attr, needs_texcoord_semantic);
break;
}
}
/**
* Determine the semantic name and index used for the given fragment shader
* result.
*/
void
tgsi_get_gl_frag_result_semantic(gl_frag_result frag_result,
unsigned *semantic_name,
unsigned *semantic_index)
{
if (frag_result >= FRAG_RESULT_DATA0) {
*semantic_name = TGSI_SEMANTIC_COLOR;
*semantic_index = frag_result - FRAG_RESULT_DATA0;
return;
}
*semantic_index = 0;
switch (frag_result) {
case FRAG_RESULT_DEPTH:
*semantic_name = TGSI_SEMANTIC_POSITION;
break;
case FRAG_RESULT_STENCIL:
*semantic_name = TGSI_SEMANTIC_STENCIL;
break;
case FRAG_RESULT_COLOR:
*semantic_name = TGSI_SEMANTIC_COLOR;
break;
case FRAG_RESULT_SAMPLE_MASK:
*semantic_name = TGSI_SEMANTIC_SAMPLEMASK;
break;
default:
assert(false);
}
}
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