[Mesa-dev] [PATCH 2/7] st/mesa: implement GL_ATI_fragment_shader
Ian Romanick
idr at freedesktop.org
Sat Feb 6 03:07:22 UTC 2016
On 02/05/2016 01:11 PM, Miklós Máté wrote:
> v2: fix arithmetic for special opcodes
> (based on comments from Marek and Ilia),
> fix fog state, cleanup
> ---
> src/mesa/Makefile.sources | 1 +
> src/mesa/program/program.h | 2 +
> src/mesa/state_tracker/st_atifs_to_tgsi.c | 734 ++++++++++++++++++++++++++++++
> src/mesa/state_tracker/st_atifs_to_tgsi.h | 65 +++
> src/mesa/state_tracker/st_atom_constbuf.c | 14 +
> src/mesa/state_tracker/st_atom_shader.c | 5 +-
> src/mesa/state_tracker/st_cb_drawpixels.c | 1 +
> src/mesa/state_tracker/st_cb_program.c | 36 +-
> src/mesa/state_tracker/st_program.c | 30 +-
> src/mesa/state_tracker/st_program.h | 4 +
> 10 files changed, 889 insertions(+), 3 deletions(-)
> create mode 100644 src/mesa/state_tracker/st_atifs_to_tgsi.c
> create mode 100644 src/mesa/state_tracker/st_atifs_to_tgsi.h
>
> diff --git a/src/mesa/Makefile.sources b/src/mesa/Makefile.sources
> index ffe560f..23fe42a 100644
> --- a/src/mesa/Makefile.sources
> +++ b/src/mesa/Makefile.sources
> @@ -393,6 +393,7 @@ VBO_FILES = \
> vbo/vbo_split_inplace.c
>
> STATETRACKER_FILES = \
> + state_tracker/st_atifs_to_tgsi.c \
> state_tracker/st_atom_array.c \
> state_tracker/st_atom_atomicbuf.c \
> state_tracker/st_atom_blend.c \
> diff --git a/src/mesa/program/program.h b/src/mesa/program/program.h
> index 24e0597..09e6928 100644
> --- a/src/mesa/program/program.h
> +++ b/src/mesa/program/program.h
> @@ -172,6 +172,8 @@ _mesa_program_enum_to_shader_stage(GLenum v)
> return MESA_SHADER_VERTEX;
> case GL_FRAGMENT_PROGRAM_ARB:
> return MESA_SHADER_FRAGMENT;
> + case GL_FRAGMENT_SHADER_ATI:
> + return MESA_SHADER_FRAGMENT;
> case GL_GEOMETRY_PROGRAM_NV:
> return MESA_SHADER_GEOMETRY;
> case GL_TESS_CONTROL_PROGRAM_NV:
> diff --git a/src/mesa/state_tracker/st_atifs_to_tgsi.c b/src/mesa/state_tracker/st_atifs_to_tgsi.c
> new file mode 100644
> index 0000000..fe303f6
> --- /dev/null
> +++ b/src/mesa/state_tracker/st_atifs_to_tgsi.c
> @@ -0,0 +1,734 @@
> +/*
> + * Copyright (C) 2016 Miklós Máté
> + *
> + * 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, sublicense,
> + * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS 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 "main/mtypes.h"
> +#include "main/atifragshader.h"
> +#include "main/texobj.h"
> +#include "main/errors.h"
> +#include "program/prog_parameter.h"
> +
> +#include "tgsi/tgsi_transform.h"
> +#include "tgsi/tgsi_ureg.h"
> +#include "util/u_math.h"
> +#include "util/u_memory.h"
> +
> +#include "st_program.h"
> +#include "st_atifs_to_tgsi.h"
> +
> +/**
> + * Intermediate state used during shader translation.
> + */
> +struct st_translate {
> + struct ureg_program *ureg;
> + struct gl_context *ctx;
> + struct ati_fragment_shader *atifs;
> +
> + struct ureg_dst temps[MAX_PROGRAM_TEMPS];
> + struct ureg_src *constants;
> + struct ureg_dst outputs[PIPE_MAX_SHADER_OUTPUTS];
> + struct ureg_src inputs[PIPE_MAX_SHADER_INPUTS];
> + struct ureg_src samplers[PIPE_MAX_SAMPLERS];
> +
> + const GLuint *inputMapping;
> + const GLuint *outputMapping;
> +
> + unsigned current_pass;
> +
> + bool regs_written[MAX_NUM_PASSES_ATI][MAX_NUM_FRAGMENT_REGISTERS_ATI];
> +
> + boolean error;
> +};
> +
> +struct instruction_desc {
> + unsigned TGSI_opcode;
> + const char *name;
> + unsigned char arg_count;
> + unsigned char special; /* no 1:1 corresponding TGSI instruction */
> +};
> +
> +static struct instruction_desc inst_desc[] = {
> + {TGSI_OPCODE_MOV, "MOV", 1, 0},
> + {TGSI_OPCODE_NOP, "UND", 0, 0}, /* unused */
> + {TGSI_OPCODE_ADD, "ADD", 2, 0},
> + {TGSI_OPCODE_MUL, "MUL", 2, 0},
> + {TGSI_OPCODE_SUB, "SUB", 2, 0},
> + {TGSI_OPCODE_DP3, "DOT3", 2, 0},
> + {TGSI_OPCODE_DP4, "DOT4", 2, 0},
> + {TGSI_OPCODE_MAD, "MAD", 3, 0},
> + {TGSI_OPCODE_LRP, "LERP", 3, 0},
> + {TGSI_OPCODE_NOP, "CND", 3, 1},
> + {TGSI_OPCODE_NOP, "CND0", 3, 2},
> + {TGSI_OPCODE_NOP, "DOT2_ADD", 3, 3}
> +};
> +
> +static struct ureg_dst get_temp(struct st_translate *t, unsigned index)
> +{
> + if (ureg_dst_is_undef(t->temps[index]))
> + t->temps[index] = ureg_DECL_temporary(t->ureg);
> + return t->temps[index];
> +}
> +
> +static struct ureg_src apply_swizzle(struct st_translate *t,
> + struct ureg_src src, GLuint swizzle)
> +{
> + if (swizzle == GL_SWIZZLE_STR_ATI) {
> + return src;
> + } else if (swizzle == GL_SWIZZLE_STQ_ATI) {
> + return ureg_swizzle(src,
> + TGSI_SWIZZLE_X, TGSI_SWIZZLE_Y, TGSI_SWIZZLE_W, TGSI_SWIZZLE_Z);
> + } else {
> + struct ureg_dst tmp[2];
> + struct ureg_src imm[3];
> +
> + tmp[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI);
> + tmp[1] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI+1);
> + imm[0] = src;
> + imm[1] = ureg_imm4f(t->ureg, 1.0, 1.0, 0.0, 0.0);
> + imm[2] = ureg_imm4f(t->ureg, 0.0, 0.0, 1.0, 1.0);
> + ureg_insn(t->ureg, TGSI_OPCODE_MAD, &tmp[0], 1, imm, 3);
> +
> + if (swizzle == GL_SWIZZLE_STR_DR_ATI)
> + imm[0] = ureg_swizzle(src,
> + TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z);
> + else
> + imm[0] = ureg_swizzle(src,
> + TGSI_SWIZZLE_W, TGSI_SWIZZLE_W, TGSI_SWIZZLE_W, TGSI_SWIZZLE_W);
> + ureg_insn(t->ureg, TGSI_OPCODE_RCP, &tmp[1], 1, &imm[0], 1);
> +
> + imm[0] = ureg_src(tmp[0]);
> + imm[1] = ureg_src(tmp[1]);
> + ureg_insn(t->ureg, TGSI_OPCODE_MUL, &tmp[0], 1, imm, 2);
> +
> + return ureg_src(tmp[0]);
> + }
> +}
> +
> +/**
> + * Map mesa texture target to TGSI texture target.
> + * Copied from st_mesa_to_tgsi.c
> + */
> +static unsigned translate_texture_target(GLuint textarget)
> +{
> + /* the shadow part is omitted */
> + switch( textarget ) {
> + case TEXTURE_2D_MULTISAMPLE_INDEX: return TGSI_TEXTURE_2D_MSAA;
> + case TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX: return TGSI_TEXTURE_2D_ARRAY_MSAA;
> + case TEXTURE_BUFFER_INDEX: return TGSI_TEXTURE_BUFFER;
> + case TEXTURE_1D_INDEX: return TGSI_TEXTURE_1D;
> + case TEXTURE_2D_INDEX: return TGSI_TEXTURE_2D;
> + case TEXTURE_3D_INDEX: return TGSI_TEXTURE_3D;
> + case TEXTURE_CUBE_INDEX: return TGSI_TEXTURE_CUBE;
> + case TEXTURE_CUBE_ARRAY_INDEX: return TGSI_TEXTURE_CUBE_ARRAY;
> + case TEXTURE_RECT_INDEX: return TGSI_TEXTURE_RECT;
> + case TEXTURE_1D_ARRAY_INDEX: return TGSI_TEXTURE_1D_ARRAY;
> + case TEXTURE_2D_ARRAY_INDEX: return TGSI_TEXTURE_2D_ARRAY;
> + case TEXTURE_EXTERNAL_INDEX: return TGSI_TEXTURE_2D;
> + default:
> + debug_assert( 0 );
> + return TGSI_TEXTURE_1D;
> + }
> +}
> +
> +static
> +gl_texture_index get_texture_target_index(struct gl_context *ctx,
> + const unsigned r)
> +{
> + struct gl_texture_object *texObj = ctx->Texture.Unit[r]._Current;
> +
> + if (texObj) {
> + return _mesa_tex_target_to_index(ctx, texObj->Target);
> + } else {
> + /* fallback for missing texture */
> + return TEXTURE_2D_INDEX;
> + }
> +}
> +
> +static struct ureg_src get_source(struct st_translate *t, GLuint src_type)
> +{
> + if (src_type >= GL_REG_0_ATI && src_type <= GL_REG_5_ATI) {
> + if (t->regs_written[t->current_pass][src_type - GL_REG_0_ATI])
> + return ureg_src(get_temp(t, src_type - GL_REG_0_ATI));
> + else
> + return ureg_imm1f(t->ureg, 0.0);
> + } else if (src_type >= GL_CON_0_ATI && src_type <= GL_CON_7_ATI) {
> + return t->constants[src_type - GL_CON_0_ATI];
> + } else if (src_type == GL_ZERO) {
> + return ureg_imm1f(t->ureg, 0.0);
> + } else if (src_type == GL_ONE) {
> + return ureg_imm1f(t->ureg, 1.0);
> + } else if (src_type == GL_PRIMARY_COLOR_ARB) {
> + return t->inputs[t->inputMapping[VARYING_SLOT_COL0]];
> + } else if (src_type == GL_SECONDARY_INTERPOLATOR_ATI) {
> + return t->inputs[t->inputMapping[VARYING_SLOT_COL1]];
> + } else {
> + assert(!"unknown source");
Perhaps use unreachable() instead? The core Mesa code should prevent this.
Also... this might be better as a switch instead of a chain of
if-else-statements. Too bad we can't use the GCC ... extension for
ranged case labels.
https://gcc.gnu.org/onlinedocs/gcc/Case-Ranges.html
> + return ureg_imm1f(t->ureg, 0.0);
> + }
> +}
> +
> +static struct ureg_src prepare_argument(struct st_translate *t, const unsigned argId,
> + const struct atifragshader_src_register *srcReg)
> +{
> + struct ureg_src src = get_source(t, srcReg->Index);
> + struct ureg_dst arg = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI+argId);
> +
> + switch (srcReg->argRep) {
> + case GL_NONE:
> + break;
> + case GL_RED:
> + src = ureg_swizzle(src,
> + TGSI_SWIZZLE_X, TGSI_SWIZZLE_X, TGSI_SWIZZLE_X, TGSI_SWIZZLE_X);
> + break;
> + case GL_GREEN:
> + src = ureg_swizzle(src,
> + TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Y);
> + break;
> + case GL_BLUE:
> + src = ureg_swizzle(src,
> + TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z);
> + break;
> + case GL_ALPHA:
> + src = ureg_swizzle(src,
> + TGSI_SWIZZLE_W, TGSI_SWIZZLE_W, TGSI_SWIZZLE_W, TGSI_SWIZZLE_W);
> + break;
> + }
> + ureg_insn(t->ureg, TGSI_OPCODE_MOV, &arg, 1, &src, 1);
> +
> + if (srcReg->argMod & GL_COMP_BIT_ATI) {
> + struct ureg_src modsrc[2];
> + modsrc[0] = ureg_imm1f(t->ureg, 1.0);
> + modsrc[1] = ureg_src(arg);
> +
> + ureg_insn(t->ureg, TGSI_OPCODE_SUB, &arg, 1, modsrc, 2);
> + }
> + if (srcReg->argMod & GL_BIAS_BIT_ATI) {
> + struct ureg_src modsrc[2];
> + modsrc[0] = ureg_src(arg);
> + modsrc[1] = ureg_imm1f(t->ureg, 0.5);
> +
> + ureg_insn(t->ureg, TGSI_OPCODE_SUB, &arg, 1, modsrc, 2);
> + }
> + if (srcReg->argMod & GL_2X_BIT_ATI) {
> + struct ureg_src modsrc[2];
> + modsrc[0] = ureg_src(arg);
> + modsrc[1] = ureg_src(arg);
> +
> + ureg_insn(t->ureg, TGSI_OPCODE_ADD, &arg, 1, modsrc, 2);
> + }
> + if (srcReg->argMod & GL_NEGATE_BIT_ATI) {
> + struct ureg_src modsrc[2];
> + modsrc[0] = ureg_src(arg);
> + modsrc[1] = ureg_imm1f(t->ureg, -1.0);
> +
> + ureg_insn(t->ureg, TGSI_OPCODE_MUL, &arg, 1, modsrc, 2);
> + }
> + return ureg_src(arg);
> +}
> +
> +/* These instructions need special treatment */
> +static void emit_special_inst(struct st_translate *t, struct instruction_desc *desc,
> + struct ureg_dst *dst, struct ureg_src *args, unsigned argcount)
> +{
> + struct ureg_dst tmp[1];
> + struct ureg_src src[3];
> +
> + if (desc->special == 1) { /* CND */
> + tmp[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI+2); /* re-purpose a3 */
> + src[0] = ureg_imm1f(t->ureg, 0.5f);
> + src[1] = args[2];
> + ureg_insn(t->ureg, TGSI_OPCODE_SUB, tmp, 1, src, 2);
> + src[0] = ureg_src(tmp[0]);
> + src[1] = args[0];
> + src[2] = args[1];
> + ureg_insn(t->ureg, TGSI_OPCODE_CMP, dst, 1, src, 3);
> + } else if (desc->special == 2) { /* CND0 */
> + src[0] = args[2];
> + src[1] = args[1];
> + src[2] = args[0];
> + ureg_insn(t->ureg, TGSI_OPCODE_CMP, dst, 1, src, 3);
> + } else if (desc->special == 3) { /* DOT2_ADD */
> + /* note: DP2A is not implemented in most pipe drivers */
> + tmp[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI); /* re-purpose a1 */
> + src[0] = args[0];
> + src[1] = args[1];
> + ureg_insn(t->ureg, TGSI_OPCODE_DP2, tmp, 1, src, 2);
> + src[0] = ureg_src(tmp[0]);
> + src[1] = ureg_swizzle(args[2],
> + TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z);
> + ureg_insn(t->ureg, TGSI_OPCODE_ADD, dst, 1, src, 2);
> + }
> +}
> +
> +static void emit_arith_inst(struct st_translate *t,
> + struct instruction_desc *desc,
> + struct ureg_dst *dst, struct ureg_src *args, unsigned argcount)
> +{
> + if (desc->special) {
> + return emit_special_inst(t, desc, dst, args, argcount);
> + }
> +
> + ureg_insn(t->ureg, desc->TGSI_opcode, dst, 1, args, argcount);
> +}
> +
> +static void emit_dstmod(struct st_translate *t,
> + struct ureg_dst dst, GLuint dstMod)
> +{
> + float imm = 1.0;
> + struct ureg_src src[3];
> +
> + if (dstMod == GL_NONE) {
> + return;
> + }
> +
> + if (dstMod & GL_2X_BIT_ATI) {
Is it even valid to have more than one bit set? If code in core Mesa
validates that only a single bit is set, this could be come a switch or
a look-up table. That would let you have everything line up without
deviating from Mesa style. :)
> + imm = 2.0f;
> + } else if (dstMod & GL_4X_BIT_ATI) {
> + imm = 4.0f;
> + } else if (dstMod & GL_8X_BIT_ATI) {
> + imm = 8.0f;
> + } else if (dstMod & GL_HALF_BIT_ATI) {
> + imm = 0.5f;
> + } else if (dstMod & GL_QUARTER_BIT_ATI) {
> + imm = 0.25f;
> + } else if (dstMod & GL_EIGHTH_BIT_ATI) {
> + imm = 0.125f;
> + }
> +
> + src[0] = ureg_src(dst);
> + src[1] = ureg_imm1f(t->ureg, imm);
> + if (dstMod & GL_SATURATE_BIT_ATI) {
> + dst = ureg_saturate(dst);
> + }
> + ureg_insn(t->ureg, TGSI_OPCODE_MUL, &dst, 1, src, 2);
> +}
> +
> +/**
> + * Compile one setup instruction to TGSI instructions.
> + */
> +static void compile_setupinst(struct gl_context *ctx,
> + struct st_translate *t,
> + const unsigned r,
> + const struct atifs_setupinst *texinst)
> +{
> + struct ureg_dst dst[1];
> + struct ureg_src src[2];
> +
> + if (!texinst->Opcode)
> + return;
> +
> + dst[0] = get_temp(t, r);
> +
> + GLuint pass_tex = texinst->src;
> +
> + if (pass_tex >= GL_TEXTURE0_ARB && pass_tex <= GL_TEXTURE7_ARB) {
> + unsigned attr = pass_tex - GL_TEXTURE0_ARB + VARYING_SLOT_TEX0;
> +
> + src[0] = t->inputs[t->inputMapping[attr]];
> + } else if (pass_tex >= GL_REG_0_ATI && pass_tex <= GL_REG_5_ATI) {
> + unsigned reg = pass_tex - GL_REG_0_ATI;
> +
> + /* the frontend already validated that REG is only allowed in second pass */
> + if (t->regs_written[0][reg]) {
> + src[0] = ureg_src(t->temps[reg]);
> + } else {
> + src[0] = ureg_imm1f(t->ureg, 0.0);
> + }
> + }
> + src[0] = apply_swizzle(t, src[0], texinst->swizzle);
> +
> + if (texinst->Opcode == ATI_FRAGMENT_SHADER_SAMPLE_OP) {
> + /* use the current texture target for the sample operation
> + * note: this implementation doesn't support re-using an ATI_fs
> + * with different texture targets
> + */
> + gl_texture_index index = get_texture_target_index(ctx, r);
> + unsigned target = translate_texture_target(index);
> +
> + /* by default texture and sampler indexes are the same */
> + src[1] = t->samplers[r];
> + ureg_tex_insn(t->ureg, TGSI_OPCODE_TEX, dst, 1, target,
> + NULL, 0, src, 2);
> + } else if (texinst->Opcode == ATI_FRAGMENT_SHADER_PASS_OP) {
> + ureg_insn(t->ureg, TGSI_OPCODE_MOV, dst, 1, src, 1);
> + }
> +
> + t->regs_written[t->current_pass][r] = true;
> +}
> +
> +/**
> + * Compile one arithmetic operation COLOR&ALPHA pair into TGSI instructions.
> + */
> +static void compile_instruction(struct st_translate *t,
> + const struct atifs_instruction *inst)
> +{
> + unsigned optype;
> +
> + for (optype=0; optype<2; optype++) { /* color, alpha */
> + struct instruction_desc *desc;
> + struct ureg_dst dst[1];
> + struct ureg_src args[3]; /* arguments for the main operation */
> + unsigned arg;
> + unsigned dstreg = inst->DstReg[optype].Index - GL_REG_0_ATI;
> +
> + if (!inst->Opcode[optype])
> + continue;
> +
> + desc = &inst_desc[inst->Opcode[optype]-GL_MOV_ATI];
> +
> + /* prepare the arguments */
> + for (arg=0; arg<desc->arg_count; arg++) {
> + if (arg >= inst->ArgCount[optype]) {
> + _mesa_warning(t->ctx, "Using 0 for missing argument %d of %s\n",
> + arg, desc->name);
> + args[arg] = ureg_imm1f(t->ureg, 0.0);
> + } else {
> + args[arg] = prepare_argument(t, arg,
> + &inst->SrcReg[optype][arg]);
> + }
> + }
> +
> + /* prepare dst */
> + dst[0] = get_temp(t, dstreg);
> +
> + if (optype)
> + dst[0] = ureg_writemask(dst[0], TGSI_WRITEMASK_W);
> + else {
> + GLuint dstMask = inst->DstReg[optype].dstMask;
> + if (dstMask == GL_NONE)
> + dst[0] = ureg_writemask(dst[0], TGSI_WRITEMASK_XYZ);
> + else
> + dst[0] = ureg_writemask(dst[0], dstMask); /* the enum values match */
> + }
> +
> + /* emit the main instruction */
> + emit_arith_inst(t, desc, dst, args, arg);
> +
> + emit_dstmod(t, *dst, inst->DstReg[optype].dstMod);
> +
> + t->regs_written[t->current_pass][dstreg] = true;
> + }
> +}
> +
> +/*static void add_tint(struct st_translate *t, float r, float g, float b)
> +{
> + struct ureg_dst dst[1];
> + struct ureg_src src[2];
> + dst[0] = t->temps[0];
> + src[0] = ureg_src(t->temps[0]);
> + src[1] = ureg_imm4f(t->ureg, r, g, b, 1.0);
> + ureg_insn(t->ureg, TGSI_OPCODE_MUL, dst, 1, src, 2);
> +}*/
> +
> +static void apply_fog(struct st_translate *t)
> +{
> + struct gl_fog_attrib *fog = &t->ctx->Fog;
> + struct ureg_src oparams = t->constants[8];
> + struct ureg_src fogcolor = t->constants[9];
> + /* this is a single float in the X coordinate */
> + struct ureg_src fogcoord = t->inputs[t->inputMapping[VARYING_SLOT_FOGC]];
> +
> + struct ureg_dst dst[1];
> + struct ureg_src src[3];
> +
> + /* compute the 1 component fog factor f */
> + if (fog->Mode == GL_LINEAR) {
> + /* formula: f = (end - z) / (end - start)
> + * with optimized parameters: f = MAD(fogcoord, oparams.x, oparams.y)
> + */
> + dst[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI);
> + src[0] = fogcoord;
> + src[1] = ureg_swizzle(oparams,
> + TGSI_SWIZZLE_X, TGSI_SWIZZLE_X, TGSI_SWIZZLE_X, TGSI_SWIZZLE_X);
> + src[2] = ureg_swizzle(oparams,
> + TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Y);
> +
> + ureg_insn(t->ureg, TGSI_OPCODE_MAD, dst, 1, src, 3);
> + } else if (fog->Mode == GL_EXP) {
> + /* formula: f = exp(-dens * z)
> + * with optimized parameters:
> + * f = MUL(fogcoord, oparams.z); f= EX2(-f)
> + */
> + dst[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI);
> + src[0] = fogcoord;
> + src[1] = ureg_swizzle(oparams,
> + TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z);
> + ureg_insn(t->ureg, TGSI_OPCODE_MUL, dst, 1, src, 2);
> + dst[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI);
> + src[0] = ureg_negate(ureg_src(dst[0]));
> + ureg_insn(t->ureg, TGSI_OPCODE_EX2, dst, 1, src, 1);
> + } else if (fog->Mode == GL_EXP2) {
> + /* formula: f = exp(-(dens * z)^2)
> + * with optimized parameters:
> + * f = MUL(fogcoord, oparams.w); f=MUL(f, f); f= EX2(-f)
> + */
> + dst[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI);
> + src[0] = fogcoord;
> + src[1] = ureg_swizzle(oparams,
> + TGSI_SWIZZLE_W, TGSI_SWIZZLE_W, TGSI_SWIZZLE_W, TGSI_SWIZZLE_W);
> + ureg_insn(t->ureg, TGSI_OPCODE_MUL, dst, 1, src, 2);
> + dst[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI);
> + src[0] = ureg_src(dst[0]);
> + ureg_insn(t->ureg, TGSI_OPCODE_MUL, dst, 1, src, 2);
> + dst[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI);
> + src[0] = ureg_negate(ureg_src(dst[0]));
> + ureg_insn(t->ureg, TGSI_OPCODE_EX2, dst, 1, src, 1);
> + }
> +
> + dst[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI);
> + src[0] = ureg_src(dst[0]);
> + src[1] = ureg_imm1f(t->ureg, 0.0f);
> + src[2] = ureg_imm1f(t->ureg, 1.0f);
> + ureg_insn(t->ureg, TGSI_OPCODE_CLAMP, dst, 1, src, 3);
> +
> + dst[0] = t->temps[0];
> + src[0] = ureg_swizzle(ureg_src(get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI)),
> + TGSI_SWIZZLE_X, TGSI_SWIZZLE_X, TGSI_SWIZZLE_X, TGSI_SWIZZLE_Y);
> + src[1] = ureg_src(t->temps[0]);
> + src[2] = fogcolor;
> + ureg_insn(t->ureg, TGSI_OPCODE_LRP, dst, 1, src, 3);
> +}
> +
> +static void finalize_shader(struct st_translate *t, unsigned numPasses)
> +{
> + struct ureg_dst dst[1] = { { 0 } };
> + struct ureg_src src[1] = { { 0 } };
> +
> + if (t->regs_written[numPasses-1][0]) {
> + if (t->ctx->Fog.Enabled)
> + apply_fog(t);
> +
> + /*add_tint(t, 1, 0, 1);*/
> +
> + /* copy the result into the OUT slot */
> + dst[0] = t->outputs[t->outputMapping[FRAG_RESULT_COLOR]];
> + src[0] = ureg_src(t->temps[0]);
> + ureg_insn(t->ureg, TGSI_OPCODE_MOV, dst, 1, src, 1);
> + }
> +
> + /* signal the end of the program */
> + ureg_insn(t->ureg, TGSI_OPCODE_END, dst, 0, src, 0);
> +}
> +
> +/**
> + * Called when a new variant is needed, we need to translate
> + * the ATI fragment shader to TGSI
> + */
> +enum pipe_error
> +st_translate_atifs_program(
> + struct gl_context *ctx,
> + struct ureg_program *ureg,
> + struct ati_fragment_shader *atifs,
> + struct gl_program *program,
> + GLuint numInputs,
> + const GLuint inputMapping[],
> + const ubyte inputSemanticName[],
> + const ubyte inputSemanticIndex[],
> + const GLuint interpMode[],
> + GLuint numOutputs,
> + const GLuint outputMapping[],
> + const ubyte outputSemanticName[],
> + const ubyte outputSemanticIndex[])
> +{
> + enum pipe_error ret = PIPE_OK;
> +
> + unsigned pass, i, r;
> +
> + struct st_translate translate, *t;
> + t = &translate;
> + memset(t, 0, sizeof *t);
> +
> + t->inputMapping = inputMapping;
> + t->outputMapping = outputMapping;
> + t->ureg = ureg;
> + t->ctx = ctx;
> + t->atifs = atifs;
> +
> + /*
> + * Declare input attributes.
> + */
> + for (i = 0; i < numInputs; i++) {
> + t->inputs[i] = ureg_DECL_fs_input(ureg,
> + inputSemanticName[i],
> + inputSemanticIndex[i],
> + interpMode[i]);
> + }
> +
> + /*
> + * Declare output attributes:
> + * we always have numOutputs=1 and it's FRAG_RESULT_COLOR
> + */
> + t->outputs[0] = ureg_DECL_output( ureg,
> + TGSI_SEMANTIC_COLOR,
> + outputSemanticIndex[0] );
> +
> + /* Emit constants and immediates. Mesa uses a single index space
> + * for these, so we put all the translated regs in t->constants.
> + */
> + if (program->Parameters) {
> + t->constants = calloc( program->Parameters->NumParameters,
> + sizeof t->constants[0] );
> + if (t->constants == NULL) {
> + ret = PIPE_ERROR_OUT_OF_MEMORY;
> + goto out;
> + }
> +
> + for (i = 0; i < program->Parameters->NumParameters; i++) {
> + switch (program->Parameters->Parameters[i].Type) {
> + case PROGRAM_STATE_VAR:
> + case PROGRAM_UNIFORM:
> + t->constants[i] = ureg_DECL_constant( ureg, i );
> + break;
> +
> + case PROGRAM_CONSTANT:
> + t->constants[i] =
> + ureg_DECL_immediate( ureg,
> + (const float*)program->Parameters->ParameterValues[i],
> + 4 );
> + break;
> + default:
> + break;
> + }
> + }
> + }
> +
> + /* texture samplers */
> + for (i = 0; i < ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits; i++) {
> + if (program->SamplersUsed & (1 << i)) {
> + t->samplers[i] = ureg_DECL_sampler( ureg, i );
> +
> + /* fix texture targets that are not 2D * /
> + / * note: this implementation doesn't support re-using an ATI_fs
> + * with different texture targets
> + */
> + gl_texture_index index = get_texture_target_index(ctx, i);
> + if (index != TEXTURE_2D_INDEX) {
> + program->TexturesUsed[i] &= ~TEXTURE_2D_BIT;
> + program->TexturesUsed[i] |= (1 << index);
> + }
> + }
> + }
> +
> + /* emit instructions */
> + for (pass=0; pass<atifs->NumPasses; pass++) {
> + t->current_pass = pass;
> + for (r=0; r<MAX_NUM_FRAGMENT_REGISTERS_ATI; r++) {
> + struct atifs_setupinst *texinst = &atifs->SetupInst[pass][r];
> + compile_setupinst(ctx, t, r, texinst);
> + }
> + for (i=0; i<atifs->numArithInstr[pass]; i++) {
> + struct atifs_instruction *inst = &atifs->Instructions[pass][i];
> + compile_instruction(t, inst);
> + }
> + }
> +
> + finalize_shader(t, atifs->NumPasses);
> +
> +out:
> + free(t->constants);
> +
> + if (t->error) {
> + debug_printf("%s: translate error flag set\n", __func__);
> + }
> +
> + return ret;
> +}
> +
> +/**
> + * Called in ProgramStringNotify, we need to fill the metadata of the
> + * gl_program attached to the ati_fragment_shader
> + */
> +void
> +st_init_atifs_prog(struct gl_context *ctx, struct gl_program *prog)
> +{
> + /* we know this is st_fragment_program, because of st_new_ati_fs() */
> + struct st_fragment_program *stfp = (struct st_fragment_program *) prog;
> + struct ati_fragment_shader *atifs = stfp->ati_fs;
> +
> + unsigned pass, i, r, optype, arg;
> +
> + static const gl_state_index fog_params_state[STATE_LENGTH] =
> + {STATE_INTERNAL, STATE_FOG_PARAMS_OPTIMIZED, 0, 0, 0};
> + static const gl_state_index fog_color[STATE_LENGTH] =
> + {STATE_FOG_COLOR, 0, 0, 0, 0};
> +
> + prog->InputsRead = 0;
> + prog->OutputsWritten = BITFIELD64_BIT(FRAG_RESULT_COLOR);
> + prog->SamplersUsed = 0;
> + prog->Parameters = _mesa_new_parameter_list();
> +
> + /* fill in InputsRead, SamplersUsed, TexturesUsed */
> + for (pass=0; pass<atifs->NumPasses; pass++) {
> + for (r=0; r<MAX_NUM_FRAGMENT_REGISTERS_ATI; r++) {
> + struct atifs_setupinst *texinst = &atifs->SetupInst[pass][r];
> + GLuint pass_tex = texinst->src;
> +
> + if (texinst->Opcode == ATI_FRAGMENT_SHADER_SAMPLE_OP) {
> + /* mark which texcoords are used */
> + prog->InputsRead |= BITFIELD64_BIT(VARYING_SLOT_TEX0 + pass_tex - GL_TEXTURE0_ARB);
> + /* by default there is 1:1 mapping between samplers and textures */
> + prog->SamplersUsed |= (1 << r);
> + /* the target is unknown here, it will be fixed in the draw call */
> + prog->TexturesUsed[r] = TEXTURE_2D_BIT;
> + } else if (texinst->Opcode == ATI_FRAGMENT_SHADER_PASS_OP) {
> + if (pass_tex >= GL_TEXTURE0_ARB && pass_tex <= GL_TEXTURE7_ARB) {
> + prog->InputsRead |= BITFIELD64_BIT(VARYING_SLOT_TEX0 + pass_tex - GL_TEXTURE0_ARB);
> + }
> + }
> + }
> + }
> + for (pass=0; pass<atifs->NumPasses; pass++) {
> + for (i=0; i<atifs->numArithInstr[pass]; i++) {
> + struct atifs_instruction *inst = &atifs->Instructions[pass][i];
> +
> + for (optype=0; optype<2; optype++) { /* color, alpha */
> + if (inst->Opcode[optype]) {
> + for (arg=0; arg<inst->ArgCount[optype]; arg++) {
> + GLint index = inst->SrcReg[optype][arg].Index;
> + if (index == GL_PRIMARY_COLOR_EXT) {
> + prog->InputsRead |= BITFIELD64_BIT(VARYING_SLOT_COL0);
> + } else if (index == GL_SECONDARY_INTERPOLATOR_ATI) {
> + /* note: ATI_fragment_shader.txt never specifies what
> + * GL_SECONDARY_INTERPOLATOR_ATI is, swrast uses
> + * VARYING_SLOT_COL1 for this input */
> + prog->InputsRead |= BITFIELD64_BIT(VARYING_SLOT_COL1);
> + }
> + }
> + }
> + }
> + }
> + }
> + /* We may need fog */
> + prog->InputsRead |= BITFIELD64_BIT(VARYING_SLOT_FOGC);
> +
> + /* we always have 8 ATI_fs constants, and the fog params */
> + for (i=0; i<8; i++) {
> + _mesa_add_parameter(prog->Parameters, PROGRAM_UNIFORM,
> + NULL, 4, GL_FLOAT, NULL, NULL);
> + }
> + _mesa_add_state_reference(prog->Parameters, fog_params_state);
> + _mesa_add_state_reference(prog->Parameters, fog_color);
> +
> + prog->NumInstructions = 0;
> + prog->NumTemporaries = 6+3; /* 6 registers, 3 input temps for arith ops */
> + prog->NumParameters = 8+2; /* the number of constants + state variables */
> +}
> +
> diff --git a/src/mesa/state_tracker/st_atifs_to_tgsi.h b/src/mesa/state_tracker/st_atifs_to_tgsi.h
> new file mode 100644
> index 0000000..0ed4195
> --- /dev/null
> +++ b/src/mesa/state_tracker/st_atifs_to_tgsi.h
> @@ -0,0 +1,65 @@
> +/*
> + * Copyright (C) 2016 Miklós Máté
> + *
> + * 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, sublicense,
> + * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS 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.
> + */
> +
> +#ifndef ST_ATIFS_TO_TGSI_H
> +#define ST_ATIFS_TO_TGSI_H
> +
> +#if defined __cplusplus
> +extern "C" {
> +#endif
> +
> +#include "main/glheader.h"
> +
> +#include "pipe/p_compiler.h"
> +#include "pipe/p_defines.h"
> +
> +struct gl_context;
> +struct gl_program;
> +struct tgsi_token;
> +struct ureg_program;
> +
> +enum pipe_error
> +st_translate_atifs_program(
> + struct gl_context *ctx,
> + struct ureg_program *ureg,
> + struct ati_fragment_shader *atifs,
> + struct gl_program *program,
> + GLuint numInputs,
> + const GLuint inputMapping[],
> + const ubyte inputSemanticName[],
> + const ubyte inputSemanticIndex[],
> + const GLuint interpMode[],
> + GLuint numOutputs,
> + const GLuint outputMapping[],
> + const ubyte outputSemanticName[],
> + const ubyte outputSemanticIndex[]);
> +
> +
> +void
> +st_init_atifs_prog(struct gl_context *ctx, struct gl_program *prog);
> +
> +
> +#if defined __cplusplus
> +} /* extern "C" */
> +#endif
> +
> +#endif /* ST_ATIFS_TO_TGSI_H */
> diff --git a/src/mesa/state_tracker/st_atom_constbuf.c b/src/mesa/state_tracker/st_atom_constbuf.c
> index 66811d2..3982e6b 100644
> --- a/src/mesa/state_tracker/st_atom_constbuf.c
> +++ b/src/mesa/state_tracker/st_atom_constbuf.c
> @@ -63,6 +63,20 @@ void st_upload_constants( struct st_context *st,
> shader_type == PIPE_SHADER_TESS_CTRL ||
> shader_type == PIPE_SHADER_TESS_EVAL);
>
> + /* update the ATI constants before rendering */
> + struct ati_fragment_shader *ati_fs = st->fp->ati_fs;
> + if (shader_type == PIPE_SHADER_FRAGMENT && ati_fs) {
> + unsigned c;
> + for (c=0; c<8; c++) {
> + if (ati_fs->LocalConstDef & (1 << c))
> + memcpy(params->ParameterValues[c],
> + ati_fs->Constants[c], sizeof(GLfloat) * 4);
> + else
> + memcpy(params->ParameterValues[c],
> + st->ctx->ATIFragmentShader.GlobalConstants[c], sizeof(GLfloat) * 4);
> + }
> + }
> +
> /* update constants */
> if (params && params->NumParameters) {
> struct pipe_constant_buffer cb;
> diff --git a/src/mesa/state_tracker/st_atom_shader.c b/src/mesa/state_tracker/st_atom_shader.c
> index 0f9ea10..ce4b607 100644
> --- a/src/mesa/state_tracker/st_atom_shader.c
> +++ b/src/mesa/state_tracker/st_atom_shader.c
> @@ -81,6 +81,9 @@ update_fp( struct st_context *st )
> SYSTEM_BIT_SAMPLE_POS)) &&
> _mesa_get_min_invocations_per_fragment(st->ctx, &stfp->Base, true) > 1;
>
> + if (stfp->ati_fs)
> + key.fog = st->ctx->Fog.Enabled;
> +
> st->fp_variant = st_get_fp_variant(st, stfp, &key);
>
> st_reference_fragprog(st, &st->fp, stfp);
> @@ -93,7 +96,7 @@ update_fp( struct st_context *st )
> const struct st_tracked_state st_update_fp = {
> "st_update_fp", /* name */
> { /* dirty */
> - _NEW_BUFFERS | _NEW_MULTISAMPLE, /* mesa */
> + _NEW_BUFFERS | _NEW_MULTISAMPLE | _NEW_FOG, /* mesa */
> ST_NEW_FRAGMENT_PROGRAM /* st */
> },
> update_fp /* update */
> diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c
> index 04a9de0..95cca41 100644
> --- a/src/mesa/state_tracker/st_cb_drawpixels.c
> +++ b/src/mesa/state_tracker/st_cb_drawpixels.c
> @@ -1309,6 +1309,7 @@ blit_copy_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
> !ctx->FragmentProgram.Enabled &&
> !ctx->VertexProgram.Enabled &&
> !ctx->_Shader->CurrentProgram[MESA_SHADER_FRAGMENT] &&
> + !ctx->ATIFragmentShader._Enabled &&
> ctx->DrawBuffer->_NumColorDrawBuffers == 1 &&
> !ctx->Query.CondRenderQuery &&
> !ctx->Query.CurrentOcclusionObject) {
> diff --git a/src/mesa/state_tracker/st_cb_program.c b/src/mesa/state_tracker/st_cb_program.c
> index 2c4eccf..2de554e 100644
> --- a/src/mesa/state_tracker/st_cb_program.c
> +++ b/src/mesa/state_tracker/st_cb_program.c
> @@ -35,6 +35,7 @@
> #include "main/enums.h"
> #include "main/shaderapi.h"
> #include "program/prog_instruction.h"
> +#include "program/prog_parameter.h"
> #include "program/program.h"
>
> #include "cso_cache/cso_context.h"
> @@ -46,6 +47,7 @@
> #include "st_mesa_to_tgsi.h"
> #include "st_cb_program.h"
> #include "st_glsl_to_tgsi.h"
> +#include "st_atifs_to_tgsi.h"
>
>
>
> @@ -278,6 +280,22 @@ st_program_string_notify( struct gl_context *ctx,
> if (st->tep == sttep)
> st->dirty.st |= ST_NEW_TESSEVAL_PROGRAM;
> }
> + else if (target == GL_FRAGMENT_SHADER_ATI) {
> + assert(prog);
> +
> + struct st_fragment_program *stfp = (struct st_fragment_program *) prog;
> + assert(stfp->ati_fs);
> + assert(stfp->ati_fs->Program == prog);
> +
> + st_init_atifs_prog(ctx, prog);
> +
> + st_release_fp_variants(st, stfp);
> +
> + /* deliberately no translate here */
> +
> + if (st->fp == stfp)
> + st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
> + }
>
> if (ST_DEBUG & DEBUG_PRECOMPILE ||
> st->shader_has_one_variant[stage])
> @@ -286,6 +304,21 @@ st_program_string_notify( struct gl_context *ctx,
> return GL_TRUE;
> }
>
> +/**
> + * Called via ctx->Driver.NewATIfs()
> + * Called in glEndFragmentShaderATI()
> + */
> +static struct gl_program *
> +st_new_ati_fs( struct gl_context *ctx,
> + struct ati_fragment_shader *curProg)
> +{
> + struct gl_program *prog = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB,
> + curProg->Id);
> + struct st_fragment_program *stfp = (struct st_fragment_program *)prog;
> + stfp->ati_fs = curProg;
> + return prog;
> +}
> +
>
> /**
> * Plug in the program and shader-related device driver functions.
> @@ -299,6 +332,7 @@ st_init_program_functions(struct dd_function_table *functions)
> functions->DeleteProgram = st_delete_program;
> functions->IsProgramNative = st_is_program_native;
> functions->ProgramStringNotify = st_program_string_notify;
> -
> + functions->NewATIfs = st_new_ati_fs;
> +
> functions->LinkShader = st_link_shader;
> }
> diff --git a/src/mesa/state_tracker/st_program.c b/src/mesa/state_tracker/st_program.c
> index b395454..8640863 100644
> --- a/src/mesa/state_tracker/st_program.c
> +++ b/src/mesa/state_tracker/st_program.c
> @@ -53,6 +53,7 @@
> #include "st_context.h"
> #include "st_program.h"
> #include "st_mesa_to_tgsi.h"
> +#include "st_atifs_to_tgsi.h"
> #include "cso_cache/cso_context.h"
>
>
> @@ -846,7 +847,23 @@ st_translate_fragment_program(struct st_context *st,
>
> free_glsl_to_tgsi_visitor(stfp->glsl_to_tgsi);
> stfp->glsl_to_tgsi = NULL;
> - } else
> + } else if (stfp->ati_fs)
> + st_translate_atifs_program(st->ctx,
> + ureg,
> + stfp->ati_fs,
> + &stfp->Base.Base,
> + /* inputs */
> + fs_num_inputs,
> + inputMapping,
> + input_semantic_name,
> + input_semantic_index,
> + interpMode,
> + /* outputs */
> + fs_num_outputs,
> + outputMapping,
> + fs_output_semantic_name,
> + fs_output_semantic_index);
> + else
> st_translate_mesa_program(st->ctx,
> TGSI_PROCESSOR_FRAGMENT,
> ureg,
> @@ -880,6 +897,12 @@ st_create_fp_variant(struct st_context *st,
> if (!variant)
> return NULL;
>
> + if (stfp->ati_fs) {
> + /* this is in the draw call, because we denied to precompile */
> + if (!st_translate_fragment_program(st, stfp))
> + return NULL;
> + }
> +
> tgsi.tokens = stfp->tgsi.tokens;
>
> assert(!(key->bitmap && key->drawpixels));
> @@ -1821,6 +1844,11 @@ st_precompile_shader_variant(struct st_context *st,
> struct st_fragment_program *p = (struct st_fragment_program *)prog;
> struct st_fp_variant_key key;
>
> + if (p->ati_fs) {
> + /* deny precompile */
> + return;
> + }
> +
> memset(&key, 0, sizeof(key));
> key.st = st->has_shareable_shaders ? NULL : st;
> st_get_fp_variant(st, p, &key);
> diff --git a/src/mesa/state_tracker/st_program.h b/src/mesa/state_tracker/st_program.h
> index a745315..822ece6 100644
> --- a/src/mesa/state_tracker/st_program.h
> +++ b/src/mesa/state_tracker/st_program.h
> @@ -65,6 +65,9 @@ struct st_fp_variant_key
>
> /** for ARB_sample_shading */
> GLuint persample_shading:1;
> +
> + /** needed for ATI_fragment_shader */
> + GLuint fog:1;
> };
>
>
> @@ -99,6 +102,7 @@ struct st_fragment_program
> struct gl_fragment_program Base;
> struct pipe_shader_state tgsi;
> struct glsl_to_tgsi_visitor* glsl_to_tgsi;
> + struct ati_fragment_shader *ati_fs;
>
> struct st_fp_variant *variants;
> };
>
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