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/**************************************************************************
*
* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* 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 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 TUNGSTEN GRAPHICS AND/OR ITS 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.
*
**************************************************************************/
/*
* Authors:
* Keith Whitwell <keith@tungstengraphics.com>
* Brian Paul
*/
#include "shader/prog_parameter.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "pipe/p_winsys.h"
#include "pipe/tgsi/mesa/mesa_to_tgsi.h"
#include "pipe/tgsi/exec/tgsi_dump.h"
#include "st_context.h"
#include "st_cache.h"
#include "st_atom.h"
#include "st_program.h"
#define TGSI_DEBUG 1
/**
* Translate a Mesa fragment shader into a TGSI shader.
* \return pointer to cached pipe_shader object.
*/
const struct cso_fragment_shader *
st_translate_fragment_shader(struct st_context *st,
struct st_fragment_program *stfp)
{
GLuint outputMapping[FRAG_RESULT_MAX];
GLuint inputMapping[PIPE_MAX_SHADER_INPUTS];
struct pipe_shader_state fs;
const struct cso_fragment_shader *cso;
GLuint interpMode[16]; /* XXX size? */
GLuint attr;
GLbitfield inputsRead = stfp->Base.Base.InputsRead;
/* Check if all fragment programs need the fragment position (in order
* to do perspective-corrected interpolation).
*/
if (st->pipe->get_param(st->pipe, PIPE_PARAM_FS_NEEDS_POS))
inputsRead |= FRAG_BIT_WPOS;
memset(&fs, 0, sizeof(fs));
/*
* Convert Mesa program inputs to TGSI input register semantics.
*/
for (attr = 0; attr < FRAG_ATTRIB_MAX; attr++) {
if (inputsRead & (1 << attr)) {
inputMapping[attr] = fs.num_inputs;
switch (attr) {
case FRAG_ATTRIB_WPOS:
fs.input_semantic_name[fs.num_inputs] = TGSI_SEMANTIC_POSITION;
fs.input_semantic_index[fs.num_inputs] = 0;
interpMode[fs.num_inputs] = TGSI_INTERPOLATE_CONSTANT;
break;
case FRAG_ATTRIB_COL0:
fs.input_semantic_name[fs.num_inputs] = TGSI_SEMANTIC_COLOR;
fs.input_semantic_index[fs.num_inputs] = 0;
interpMode[fs.num_inputs] = TGSI_INTERPOLATE_LINEAR;
break;
case FRAG_ATTRIB_COL1:
fs.input_semantic_name[fs.num_inputs] = TGSI_SEMANTIC_COLOR;
fs.input_semantic_index[fs.num_inputs] = 1;
interpMode[fs.num_inputs] = TGSI_INTERPOLATE_LINEAR;
break;
case FRAG_ATTRIB_FOGC:
fs.input_semantic_name[fs.num_inputs] = TGSI_SEMANTIC_FOG;
fs.input_semantic_index[fs.num_inputs] = 0;
interpMode[fs.num_inputs] = TGSI_INTERPOLATE_PERSPECTIVE;
break;
case FRAG_ATTRIB_TEX0:
case FRAG_ATTRIB_TEX1:
case FRAG_ATTRIB_TEX2:
case FRAG_ATTRIB_TEX3:
case FRAG_ATTRIB_TEX4:
case FRAG_ATTRIB_TEX5:
case FRAG_ATTRIB_TEX6:
case FRAG_ATTRIB_TEX7:
fs.input_semantic_name[fs.num_inputs] = TGSI_SEMANTIC_GENERIC;
fs.input_semantic_index[fs.num_inputs] = attr - FRAG_ATTRIB_TEX0;
interpMode[fs.num_inputs] = TGSI_INTERPOLATE_PERSPECTIVE;
break;
case FRAG_ATTRIB_VAR0:
/* fall-through */
default:
fs.input_semantic_name[fs.num_inputs] = TGSI_SEMANTIC_GENERIC;
fs.input_semantic_index[fs.num_inputs] = attr - FRAG_ATTRIB_VAR0;
interpMode[fs.num_inputs] = TGSI_INTERPOLATE_PERSPECTIVE;
}
fs.num_inputs++;
}
}
/*
* Semantics for outputs
*/
for (attr = 0; attr < FRAG_RESULT_MAX; attr++) {
if (stfp->Base.Base.OutputsWritten & (1 << attr)) {
switch (attr) {
case FRAG_RESULT_DEPR:
fs.output_semantic_name[fs.num_outputs] = TGSI_SEMANTIC_POSITION;
outputMapping[attr] = fs.num_outputs;
break;
case FRAG_RESULT_COLR:
fs.output_semantic_name[fs.num_outputs] = TGSI_SEMANTIC_COLOR;
outputMapping[attr] = fs.num_outputs;
break;
default:
assert(0);
}
fs.num_outputs++;
}
}
/* XXX: fix static allocation of tokens:
*/
tgsi_mesa_compile_fp_program( &stfp->Base,
fs.num_inputs,
inputMapping,
fs.input_semantic_name,
fs.input_semantic_index,
interpMode,
outputMapping,
stfp->tokens, ST_FP_MAX_TOKENS );
fs.tokens = &stfp->tokens[0];
cso = st_cached_fs_state(st, &fs);
stfp->fs = cso;
if (TGSI_DEBUG)
tgsi_dump( stfp->tokens, 0/*TGSI_DUMP_VERBOSE*/ );
stfp->dirty = 0;
return cso;
}
static void update_fs( struct st_context *st )
{
struct st_fragment_program *stfp = NULL;
/* find active shader and params. Changes to this Mesa state
* should be covered by ST_NEW_FRAGMENT_PROGRAM, thanks to the
* logic in st_cb_program.c
*/
if (st->ctx->Shader.CurrentProgram &&
st->ctx->Shader.CurrentProgram->LinkStatus &&
st->ctx->Shader.CurrentProgram->FragmentProgram) {
struct gl_fragment_program *f
= st->ctx->Shader.CurrentProgram->FragmentProgram;
stfp = st_fragment_program(f);
}
else {
assert(st->ctx->FragmentProgram._Current);
stfp = st_fragment_program(st->ctx->FragmentProgram._Current);
}
/* if new binding, or shader has changed */
if (st->fp != stfp || stfp->dirty) {
if (stfp->dirty)
(void) st_translate_fragment_shader( st, stfp );
/* Bind the vertex program and TGSI shader */
st->fp = stfp;
st->state.fs = stfp->fs;
st->pipe->bind_fs_state(st->pipe, st->state.fs->data);
}
}
const struct st_tracked_state st_update_fs = {
.name = "st_update_fs",
.dirty = {
.mesa = 0,
.st = ST_NEW_FRAGMENT_PROGRAM,
},
.update = update_fs
};
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