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/**************************************************************************
*
* Copyright 2007 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.
*
**************************************************************************/
/*
* Generate fragment programs to implement pixel transfer ops, such as
* scale/bias, colormatrix, colortable, convolution...
*
* Authors:
* Brian Paul
*/
#include "main/imports.h"
#include "main/image.h"
#include "main/macros.h"
#include "shader/program.h"
#include "shader/prog_instruction.h"
#include "shader/prog_parameter.h"
#include "shader/prog_print.h"
#include "st_context.h"
struct state_key
{
GLuint scaleAndBias:1;
GLuint colorMatrix:1;
#if 0
GLfloat Maps[3][256][4];
int NumMaps;
GLint NumStages;
pipeline_stage Stages[STAGE_MAX];
GLboolean StagesUsed[STAGE_MAX];
GLfloat Scale1[4], Bias1[4];
GLfloat Scale2[4], Bias2[4];
#endif
};
static GLboolean
is_identity(const GLfloat m[16])
{
GLuint i;
for (i = 0; i < 16; i++) {
const int row = i % 4, col = i / 4;
const float val = (row == col);
if (m[i] != val)
return GL_FALSE;
}
return GL_TRUE;
}
static void
make_state_key(GLcontext *ctx, struct state_key *key)
{
/*GLuint i, j;*/
memset(key, 0, sizeof(*key));
if (ctx->Pixel.RedBias != 0.0 || ctx->Pixel.RedScale != 1.0 ||
ctx->Pixel.GreenBias != 0.0 || ctx->Pixel.GreenScale != 1.0 ||
ctx->Pixel.BlueBias != 0.0 || ctx->Pixel.BlueScale != 1.0 ||
ctx->Pixel.AlphaBias != 0.0 || ctx->Pixel.AlphaScale != 1.0) {
key->scaleAndBias = 1;
}
if (!is_identity(ctx->ColorMatrixStack.Top->m)) {
key->colorMatrix = 1;
}
}
#define MAX_INST 100
/**
* Returns a fragment program which implements the current pixel transfer ops.
*/
static struct gl_fragment_program *
get_pixel_transfer_program(GLcontext *ctx, const struct state_key *key)
{
struct prog_instruction inst[MAX_INST];
struct gl_program_parameter_list *params;
struct gl_fragment_program *fp;
GLuint ic = 0;
fp = (struct gl_fragment_program *)
ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
if (!fp)
return NULL;
params = _mesa_new_parameter_list();
/* TEX result.color, fragment.texcoord[0], texture[0], 2D; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_TEX;
inst[ic].DstReg.File = PROGRAM_OUTPUT;
inst[ic].DstReg.Index = FRAG_RESULT_COLR;
inst[ic].SrcReg[0].File = PROGRAM_INPUT;
inst[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
inst[ic].TexSrcUnit = 0;
inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
ic++;
fp->Base.InputsRead = (1 << FRAG_ATTRIB_TEX0);
fp->Base.OutputsWritten = (1 << FRAG_RESULT_COLR);
/* MAD result.color, result.color, scale, bias; */
if (key->scaleAndBias) {
static const gl_state_index scale_state[STATE_LENGTH] =
{ STATE_INTERNAL, STATE_PT_SCALE, 0, 0, 0 };
static const gl_state_index bias_state[STATE_LENGTH] =
{ STATE_INTERNAL, STATE_PT_BIAS, 0, 0, 0 };
GLfloat scale[4], bias[4];
GLint scale_p, bias_p;
scale[0] = ctx->Pixel.RedScale;
scale[1] = ctx->Pixel.GreenScale;
scale[2] = ctx->Pixel.BlueScale;
scale[3] = ctx->Pixel.AlphaScale;
bias[0] = ctx->Pixel.RedBias;
bias[1] = ctx->Pixel.GreenBias;
bias[2] = ctx->Pixel.BlueBias;
bias[3] = ctx->Pixel.AlphaBias;
scale_p = _mesa_add_state_reference(params, scale_state);
bias_p = _mesa_add_state_reference(params, bias_state);
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_MAD;
inst[ic].DstReg.File = PROGRAM_OUTPUT;
inst[ic].DstReg.Index = FRAG_RESULT_COLR;
inst[ic].SrcReg[0].File = PROGRAM_OUTPUT;
inst[ic].SrcReg[0].Index = FRAG_RESULT_COLR;
inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
inst[ic].SrcReg[1].Index = scale_p;
inst[ic].SrcReg[2].File = PROGRAM_STATE_VAR;
inst[ic].SrcReg[2].Index = bias_p;
ic++;
}
if (key->colorMatrix) {
static const gl_state_index row0_state[STATE_LENGTH] =
{ STATE_COLOR_MATRIX, 0, 0, 0, 0 };
static const gl_state_index row1_state[STATE_LENGTH] =
{ STATE_COLOR_MATRIX, 0, 1, 1, 0 };
static const gl_state_index row2_state[STATE_LENGTH] =
{ STATE_COLOR_MATRIX, 0, 2, 2, 0 };
static const gl_state_index row3_state[STATE_LENGTH] =
{ STATE_COLOR_MATRIX, 0, 3, 3, 0 };
GLint row0_p = _mesa_add_state_reference(params, row0_state);
GLint row1_p = _mesa_add_state_reference(params, row1_state);
GLint row2_p = _mesa_add_state_reference(params, row2_state);
GLint row3_p = _mesa_add_state_reference(params, row3_state);
/* MOV temp0, result.color; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_MOV;
inst[ic].DstReg.File = PROGRAM_TEMPORARY;
inst[ic].DstReg.Index = 0;
inst[ic].SrcReg[0].File = PROGRAM_OUTPUT;
inst[ic].SrcReg[0].Index = FRAG_RESULT_COLR;
ic++;
/* DP4 result.color.x, tmp0, matrow0; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_DP4;
inst[ic].DstReg.File = PROGRAM_OUTPUT;
inst[ic].DstReg.Index = FRAG_RESULT_COLR;
inst[ic].DstReg.WriteMask = WRITEMASK_X;
inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
inst[ic].SrcReg[0].Index = 0;
inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
inst[ic].SrcReg[1].Index = row0_p;
ic++;
/* DP4 result.color.y, tmp0, matrow1; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_DP4;
inst[ic].DstReg.File = PROGRAM_OUTPUT;
inst[ic].DstReg.Index = FRAG_RESULT_COLR;
inst[ic].DstReg.WriteMask = WRITEMASK_Y;
inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
inst[ic].SrcReg[0].Index = 0;
inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
inst[ic].SrcReg[1].Index = row1_p;
ic++;
/* DP4 result.color.z, tmp0, matrow2; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_DP4;
inst[ic].DstReg.File = PROGRAM_OUTPUT;
inst[ic].DstReg.Index = FRAG_RESULT_COLR;
inst[ic].DstReg.WriteMask = WRITEMASK_Z;
inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
inst[ic].SrcReg[0].Index = 0;
inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
inst[ic].SrcReg[1].Index = row2_p;
ic++;
/* DP4 result.color.w, tmp0, matrow3; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_DP4;
inst[ic].DstReg.File = PROGRAM_OUTPUT;
inst[ic].DstReg.Index = FRAG_RESULT_COLR;
inst[ic].DstReg.WriteMask = WRITEMASK_W;
inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
inst[ic].SrcReg[0].Index = 0;
inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
inst[ic].SrcReg[1].Index = row3_p;
ic++;
}
/* END; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_END;
ic++;
assert(ic <= MAX_INST);
fp->Base.Instructions = _mesa_alloc_instructions(ic);
if (!fp->Base.Instructions) {
_mesa_error(ctx, GL_OUT_OF_MEMORY,
"generating pixel transfer program");
return NULL;
}
_mesa_copy_instructions(fp->Base.Instructions, inst, ic);
fp->Base.NumInstructions = ic;
fp->Base.Parameters = params;
#if 0
printf("========= pixel transfer prog\n");
_mesa_print_program(&fp->Base);
_mesa_print_parameter_list(fp->Base.Parameters);
#endif
return fp;
}
static void
update_pixel_transfer(struct st_context *st)
{
struct state_key key;
struct gl_fragment_program *fp;
make_state_key(st->ctx, &key);
fp = (struct gl_fragment_program *)
_mesa_search_program_cache(st->pixel_transfer_cache, &key, sizeof(key));
if (!fp) {
fp = get_pixel_transfer_program(st->ctx, &key);
_mesa_program_cache_insert(st->ctx, st->pixel_transfer_cache,
&key, sizeof(key), &fp->Base);
}
st->pixel_transfer_program = fp;
}
const struct st_tracked_state st_update_pixel_transfer = {
.name = "st_update_pixel_transfer",
.dirty = {
.mesa = _NEW_PIXEL | _NEW_COLOR_MATRIX,
.st = 0,
},
.update = update_pixel_transfer
};
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