--- /dev/null
+/*
+ * 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/errors.h"
+#include "program/prog_parameter.h"
+
+#include "tgsi/tgsi_ureg.h"
+#include "tgsi/tgsi_scan.h"
+#include "tgsi/tgsi_transform.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 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;
+};
+
+static const struct instruction_desc inst_desc[] = {
+ {TGSI_OPCODE_MOV, "MOV", 1},
+ {TGSI_OPCODE_NOP, "UND", 0}, /* unused */
+ {TGSI_OPCODE_ADD, "ADD", 2},
+ {TGSI_OPCODE_MUL, "MUL", 2},
+ {TGSI_OPCODE_SUB, "SUB", 2},
+ {TGSI_OPCODE_DP3, "DOT3", 2},
+ {TGSI_OPCODE_DP4, "DOT4", 2},
+ {TGSI_OPCODE_MAD, "MAD", 3},
+ {TGSI_OPCODE_LRP, "LERP", 3},
+ {TGSI_OPCODE_NOP, "CND", 3},
+ {TGSI_OPCODE_NOP, "CND0", 3},
+ {TGSI_OPCODE_NOP, "DOT2_ADD", 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, 1.0f, 1.0f, 0.0f, 0.0f);
+ imm[2] = ureg_imm4f(t->ureg, 0.0f, 0.0f, 1.0f, 1.0f);
+ ureg_insn(t->ureg, TGSI_OPCODE_MAD, &tmp[0], 1, imm, 3);
+
+ if (swizzle == GL_SWIZZLE_STR_DR_ATI) {
+ imm[0] = ureg_scalar(src, TGSI_SWIZZLE_Z);
+ } else {
+ imm[0] = ureg_scalar(src, 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]);
+ }
+}
+
+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, 0.0f);
+ }
+ } 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, 0.0f);
+ } else if (src_type == GL_ONE) {
+ return ureg_imm1f(t->ureg, 1.0f);
+ } 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 {
+ /* frontend prevents this */
+ unreachable("unknown source");
+ }
+}
+
+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_scalar(src, TGSI_SWIZZLE_X);
+ break;
+ case GL_GREEN:
+ src = ureg_scalar(src, TGSI_SWIZZLE_Y);
+ break;
+ case GL_BLUE:
+ src = ureg_scalar(src, TGSI_SWIZZLE_Z);
+ break;
+ case GL_ALPHA:
+ src = ureg_scalar(src, 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, 1.0f);
+ 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, 0.5f);
+
+ 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, -1.0f);
+
+ 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, const 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 (!strcmp(desc->name, "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 (!strcmp(desc->name, "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 (!strcmp(desc->name, "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_scalar(args[2], TGSI_SWIZZLE_Z);
+ ureg_insn(t->ureg, TGSI_OPCODE_ADD, dst, 1, src, 2);
+ }
+}
+
+static void
+emit_arith_inst(struct st_translate *t,
+ const struct instruction_desc *desc,
+ struct ureg_dst *dst, struct ureg_src *args, unsigned argcount)
+{
+ if (desc->TGSI_opcode == TGSI_OPCODE_NOP) {
+ 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;
+ struct ureg_src src[3];
+ GLuint scale = dstMod & ~GL_SATURATE_BIT_ATI;
+
+ if (dstMod == GL_NONE) {
+ return;
+ }
+
+ switch (scale) {
+ case GL_2X_BIT_ATI:
+ imm = 2.0f;
+ break;
+ case GL_4X_BIT_ATI:
+ imm = 4.0f;
+ break;
+ case GL_8X_BIT_ATI:
+ imm = 8.0f;
+ break;
+ case GL_HALF_BIT_ATI:
+ imm = 0.5f;
+ break;
+ case GL_QUARTER_BIT_ATI:
+ imm = 0.25f;
+ break;
+ case GL_EIGHTH_BIT_ATI:
+ imm = 0.125f;
+ break;
+ default:
+ imm = 1.0f;
+ }
+
+ 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 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, 0.0f);
+ }
+ }
+ src[0] = apply_swizzle(t, src[0], texinst->swizzle);
+
+ if (texinst->Opcode == ATI_FRAGMENT_SHADER_SAMPLE_OP) {
+ /* by default texture and sampler indexes are the same */
+ src[1] = t->samplers[r];
+ /* the texture target is still unknown, it will be fixed in the draw call */
+ ureg_tex_insn(t->ureg, TGSI_OPCODE_TEX, dst, 1, TGSI_TEXTURE_2D,
+ 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 */
+ const 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(0, "Using 0 for missing argument %d of %s\n",
+ arg, desc->name);
+ args[arg] = ureg_imm1f(t->ureg, 0.0f);
+ } 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
+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]) {
+ /* 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 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->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 < MAX_NUM_FRAGMENT_REGISTERS_ATI; i++) {
+ if (program->SamplersUsed & (1 << i)) {
+ t->samplers[i] = ureg_DECL_sampler(ureg, i);
+ /* the texture target is still unknown, it will be fixed in the draw call */
+ ureg_DECL_sampler_view(ureg, i, TGSI_TEXTURE_2D,
+ TGSI_RETURN_TYPE_FLOAT,
+ TGSI_RETURN_TYPE_FLOAT,
+ TGSI_RETURN_TYPE_FLOAT,
+ TGSI_RETURN_TYPE_FLOAT);
+ }
+ }
+
+ /* 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(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 the ATI_fs constants, and the fog params */
+ for (i = 0; i < MAX_NUM_FRAGMENT_CONSTANTS_ATI; 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 = MAX_NUM_FRAGMENT_REGISTERS_ATI + 3; /* 3 input temps for arith ops */
+ prog->NumParameters = MAX_NUM_FRAGMENT_CONSTANTS_ATI + 2; /* 2 state variables for fog */
+}
+
+
+struct tgsi_atifs_transform {
+ struct tgsi_transform_context base;
+ struct tgsi_shader_info info;
+ const struct st_fp_variant_key *key;
+ bool first_instruction_emitted;
+ unsigned fog_factor_temp;
+ unsigned fog_clamp_imm;
+};
+
+static inline struct tgsi_atifs_transform *
+tgsi_atifs_transform(struct tgsi_transform_context *tctx)
+{
+ return (struct tgsi_atifs_transform *)tctx;
+}
+
+/* copied from st_cb_drawpixels_shader.c */
+static void
+set_src(struct tgsi_full_instruction *inst, unsigned i, unsigned file, unsigned index,
+ unsigned x, unsigned y, unsigned z, unsigned w)
+{
+ inst->Src[i].Register.File = file;
+ inst->Src[i].Register.Index = index;
+ inst->Src[i].Register.SwizzleX = x;
+ inst->Src[i].Register.SwizzleY = y;
+ inst->Src[i].Register.SwizzleZ = z;
+ inst->Src[i].Register.SwizzleW = w;
+}
+
+#define SET_SRC(inst, i, file, index, x, y, z, w) \
+ set_src(inst, i, file, index, TGSI_SWIZZLE_##x, TGSI_SWIZZLE_##y, \
+ TGSI_SWIZZLE_##z, TGSI_SWIZZLE_##w)
+
+static void
+transform_decl(struct tgsi_transform_context *tctx,
+ struct tgsi_full_declaration *decl)
+{
+ struct tgsi_atifs_transform *ctx = tgsi_atifs_transform(tctx);
+
+ if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) {
+ /* fix texture target */
+ unsigned newtarget = ctx->key->texture_targets[decl->Range.First];
+ if (newtarget)
+ decl->SamplerView.Resource = newtarget;
+ }
+
+ tctx->emit_declaration(tctx, decl);
+}
+
+static void
+transform_instr(struct tgsi_transform_context *tctx,
+ struct tgsi_full_instruction *current_inst)
+{
+ struct tgsi_atifs_transform *ctx = tgsi_atifs_transform(tctx);
+
+ if (ctx->first_instruction_emitted)
+ goto transform_inst;
+
+ ctx->first_instruction_emitted = true;
+
+ if (ctx->key->fog) {
+ /* add a new temp for the fog factor */
+ ctx->fog_factor_temp = ctx->info.file_max[TGSI_FILE_TEMPORARY] + 1;
+ tgsi_transform_temp_decl(tctx, ctx->fog_factor_temp);
+
+ /* add immediates for clamp */
+ ctx->fog_clamp_imm = ctx->info.immediate_count;
+ tgsi_transform_immediate_decl(tctx, 1.0f, 0.0f, 0.0f, 0.0f);
+ }
+
+transform_inst:
+ if (current_inst->Instruction.Opcode == TGSI_OPCODE_TEX) {
+ /* fix texture target */
+ unsigned newtarget = ctx->key->texture_targets[current_inst->Src[1].Register.Index];
+ if (newtarget)
+ current_inst->Texture.Texture = newtarget;
+
+ } else if (ctx->key->fog && current_inst->Instruction.Opcode == TGSI_OPCODE_MOV &&
+ current_inst->Dst[0].Register.File == TGSI_FILE_OUTPUT) {
+ struct tgsi_full_instruction inst;
+ unsigned i;
+ int fogc_index = -1;
+
+ /* find FOGC input */
+ for (i = 0; i < ctx->info.num_inputs; i++) {
+ if (ctx->info.input_semantic_name[i] == TGSI_SEMANTIC_FOG) {
+ fogc_index = i;
+ break;
+ }
+ }
+ if (fogc_index < 0) {
+ /* should never be reached, because fog coord input is always declared */
+ tctx->emit_instruction(tctx, current_inst);
+ return;
+ }
+
+ /* compute the 1 component fog factor f */
+ if (ctx->key->fog == 1) {
+ /* LINEAR formula: f = (end - z) / (end - start)
+ * with optimized parameters:
+ * f = MAD(fogcoord, oparams.x, oparams.y)
+ */
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_MAD;
+ inst.Instruction.NumDstRegs = 1;
+ inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
+ inst.Dst[0].Register.Index = ctx->fog_factor_temp;
+ inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
+ inst.Instruction.NumSrcRegs = 3;
+ SET_SRC(&inst, 0, TGSI_FILE_INPUT, fogc_index, X, Y, Z, W);
+ SET_SRC(&inst, 1, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI, X, X, X, X);
+ SET_SRC(&inst, 2, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI, Y, Y, Y, Y);
+ tctx->emit_instruction(tctx, &inst);
+ } else if (ctx->key->fog == 2) {
+ /* EXP formula: f = exp(-dens * z)
+ * with optimized parameters:
+ * f = MUL(fogcoord, oparams.z); f= EX2(-f)
+ */
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_MUL;
+ inst.Instruction.NumDstRegs = 1;
+ inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
+ inst.Dst[0].Register.Index = ctx->fog_factor_temp;
+ inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
+ inst.Instruction.NumSrcRegs = 2;
+ SET_SRC(&inst, 0, TGSI_FILE_INPUT, fogc_index, X, Y, Z, W);
+ SET_SRC(&inst, 1, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI, Z, Z, Z, Z);
+ tctx->emit_instruction(tctx, &inst);
+
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_EX2;
+ inst.Instruction.NumDstRegs = 1;
+ inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
+ inst.Dst[0].Register.Index = ctx->fog_factor_temp;
+ inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
+ inst.Instruction.NumSrcRegs = 1;
+ SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
+ inst.Src[0].Register.Negate = 1;
+ tctx->emit_instruction(tctx, &inst);
+ } else if (ctx->key->fog == 3) {
+ /* EXP2 formula: f = exp(-(dens * z)^2)
+ * with optimized parameters:
+ * f = MUL(fogcoord, oparams.w); f=MUL(f, f); f= EX2(-f)
+ */
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_MUL;
+ inst.Instruction.NumDstRegs = 1;
+ inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
+ inst.Dst[0].Register.Index = ctx->fog_factor_temp;
+ inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
+ inst.Instruction.NumSrcRegs = 2;
+ SET_SRC(&inst, 0, TGSI_FILE_INPUT, fogc_index, X, Y, Z, W);
+ SET_SRC(&inst, 1, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI, W, W, W, W);
+ tctx->emit_instruction(tctx, &inst);
+
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_MUL;
+ inst.Instruction.NumDstRegs = 1;
+ inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
+ inst.Dst[0].Register.Index = ctx->fog_factor_temp;
+ inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
+ inst.Instruction.NumSrcRegs = 2;
+ SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
+ SET_SRC(&inst, 1, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
+ tctx->emit_instruction(tctx, &inst);
+
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_EX2;
+ inst.Instruction.NumDstRegs = 1;
+ inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
+ inst.Dst[0].Register.Index = ctx->fog_factor_temp;
+ inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
+ inst.Instruction.NumSrcRegs = 1;
+ SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
+ inst.Src[0].Register.Negate ^= 1;
+ tctx->emit_instruction(tctx, &inst);
+ }
+ /* f = CLAMP(f, 0.0, 1.0) */
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_CLAMP;
+ inst.Instruction.NumDstRegs = 1;
+ inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
+ inst.Dst[0].Register.Index = ctx->fog_factor_temp;
+ inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
+ inst.Instruction.NumSrcRegs = 3;
+ SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
+ SET_SRC(&inst, 1, TGSI_FILE_IMMEDIATE, ctx->fog_clamp_imm, Y, Y, Y, Y); // 0.0
+ SET_SRC(&inst, 2, TGSI_FILE_IMMEDIATE, ctx->fog_clamp_imm, X, X, X, X); // 1.0
+ tctx->emit_instruction(tctx, &inst);
+
+ /* REG0 = LRP(f, REG0, fogcolor) */
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_LRP;
+ inst.Instruction.NumDstRegs = 1;
+ inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
+ inst.Dst[0].Register.Index = 0;
+ inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
+ inst.Instruction.NumSrcRegs = 3;
+ SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, X, X, Y);
+ SET_SRC(&inst, 1, TGSI_FILE_TEMPORARY, 0, X, Y, Z, W);
+ SET_SRC(&inst, 2, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI + 1, X, Y, Z, W);
+ tctx->emit_instruction(tctx, &inst);
+ }
+
+ tctx->emit_instruction(tctx, current_inst);
+}
+
+/*
+ * A post-process step in the draw call to fix texture targets and
+ * insert code for fog.
+ */
+const struct tgsi_token *
+st_fixup_atifs(const struct tgsi_token *tokens,
+ const struct st_fp_variant_key *key)
+{
+ struct tgsi_atifs_transform ctx;
+ struct tgsi_token *newtoks;
+ int newlen;
+
+ memset(&ctx, 0, sizeof(ctx));
+ ctx.base.transform_declaration = transform_decl;
+ ctx.base.transform_instruction = transform_instr;
+ ctx.key = key;
+ tgsi_scan_shader(tokens, &ctx.info);
+
+ newlen = tgsi_num_tokens(tokens) + 30;
+ newtoks = tgsi_alloc_tokens(newlen);
+ if (!newtoks)
+ return NULL;
+
+ tgsi_transform_shader(tokens, newtoks, newlen, &ctx.base);
+ return newtoks;
+}
+
projects / mesa.git / commitdiff