1/* 2 * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com> 3 * Joakim Sindholt <opensource@zhasha.com> 4 * Copyright 2009 Marek Olšák <maraeo@gmail.com> 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * on the rights to use, copy, modify, merge, publish, distribute, sub 10 * license, and/or sell copies of the Software, and to permit persons to whom 11 * the Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 23 * USE OR OTHER DEALINGS IN THE SOFTWARE. */ 24 25#include "util/format/u_format.h" 26#include "util/u_math.h" 27#include "util/u_memory.h" 28 29#include "tgsi/tgsi_dump.h" 30#include "tgsi/tgsi_ureg.h" 31 32#include "r300_cb.h" 33#include "r300_context.h" 34#include "r300_emit.h" 35#include "r300_screen.h" 36#include "r300_fs.h" 37#include "r300_reg.h" 38#include "r300_texture.h" 39#include "r300_tgsi_to_rc.h" 40 41#include "compiler/radeon_compiler.h" 42 43/* Convert info about FS input semantics to r300_shader_semantics. */ 44void r300_shader_read_fs_inputs(struct tgsi_shader_info* info, 45 struct r300_shader_semantics* fs_inputs) 46{ 47 int i; 48 unsigned index; 49 50 r300_shader_semantics_reset(fs_inputs); 51 52 for (i = 0; i < info->num_inputs; i++) { 53 index = info->input_semantic_index[i]; 54 55 switch (info->input_semantic_name[i]) { 56 case TGSI_SEMANTIC_COLOR: 57 assert(index < ATTR_COLOR_COUNT); 58 fs_inputs->color[index] = i; 59 break; 60 61 case TGSI_SEMANTIC_GENERIC: 62 assert(index < ATTR_GENERIC_COUNT); 63 fs_inputs->generic[index] = i; 64 break; 65 66 case TGSI_SEMANTIC_FOG: 67 assert(index == 0); 68 fs_inputs->fog = i; 69 break; 70 71 case TGSI_SEMANTIC_POSITION: 72 assert(index == 0); 73 fs_inputs->wpos = i; 74 break; 75 76 case TGSI_SEMANTIC_FACE: 77 assert(index == 0); 78 fs_inputs->face = i; 79 break; 80 81 default: 82 fprintf(stderr, "r300: FP: Unknown input semantic: %i\n", 83 info->input_semantic_name[i]); 84 } 85 } 86} 87 88static void find_output_registers(struct r300_fragment_program_compiler * compiler, 89 struct r300_fragment_shader_code *shader) 90{ 91 unsigned i; 92 93 /* Mark the outputs as not present initially */ 94 compiler->OutputColor[0] = shader->info.num_outputs; 95 compiler->OutputColor[1] = shader->info.num_outputs; 96 compiler->OutputColor[2] = shader->info.num_outputs; 97 compiler->OutputColor[3] = shader->info.num_outputs; 98 compiler->OutputDepth = shader->info.num_outputs; 99 100 /* Now see where they really are. */ 101 for(i = 0; i < shader->info.num_outputs; ++i) { 102 switch(shader->info.output_semantic_name[i]) { 103 case TGSI_SEMANTIC_COLOR: 104 compiler->OutputColor[shader->info.output_semantic_index[i]] = i; 105 break; 106 case TGSI_SEMANTIC_POSITION: 107 compiler->OutputDepth = i; 108 break; 109 } 110 } 111} 112 113static void allocate_hardware_inputs( 114 struct r300_fragment_program_compiler * c, 115 void (*allocate)(void * data, unsigned input, unsigned hwreg), 116 void * mydata) 117{ 118 struct r300_shader_semantics* inputs = 119 (struct r300_shader_semantics*)c->UserData; 120 int i, reg = 0; 121 122 /* Allocate input registers. */ 123 for (i = 0; i < ATTR_COLOR_COUNT; i++) { 124 if (inputs->color[i] != ATTR_UNUSED) { 125 allocate(mydata, inputs->color[i], reg++); 126 } 127 } 128 if (inputs->face != ATTR_UNUSED) { 129 allocate(mydata, inputs->face, reg++); 130 } 131 for (i = 0; i < ATTR_GENERIC_COUNT; i++) { 132 if (inputs->generic[i] != ATTR_UNUSED) { 133 allocate(mydata, inputs->generic[i], reg++); 134 } 135 } 136 if (inputs->fog != ATTR_UNUSED) { 137 allocate(mydata, inputs->fog, reg++); 138 } 139 if (inputs->wpos != ATTR_UNUSED) { 140 allocate(mydata, inputs->wpos, reg++); 141 } 142} 143 144void r300_fragment_program_get_external_state( 145 struct r300_context* r300, 146 struct r300_fragment_program_external_state* state) 147{ 148 struct r300_textures_state *texstate = r300->textures_state.state; 149 unsigned i; 150 151 state->alpha_to_one = r300->alpha_to_one && r300->msaa_enable; 152 153 for (i = 0; i < texstate->sampler_state_count; i++) { 154 struct r300_sampler_state *s = texstate->sampler_states[i]; 155 struct r300_sampler_view *v = texstate->sampler_views[i]; 156 struct r300_resource *t; 157 158 if (!s || !v) { 159 continue; 160 } 161 162 t = r300_resource(v->base.texture); 163 164 if (s->state.compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE) { 165 state->unit[i].compare_mode_enabled = 1; 166 167 /* Fortunately, no need to translate this. */ 168 state->unit[i].texture_compare_func = s->state.compare_func; 169 } 170 171 /* Pass texture swizzling to the compiler, some lowering passes need it. */ 172 if (state->unit[i].compare_mode_enabled) { 173 state->unit[i].texture_swizzle = 174 RC_MAKE_SWIZZLE(v->swizzle[0], v->swizzle[1], 175 v->swizzle[2], v->swizzle[3]); 176 } 177 178 /* XXX this should probably take into account STR, not just S. */ 179 if (t->tex.is_npot) { 180 switch (s->state.wrap_s) { 181 case PIPE_TEX_WRAP_REPEAT: 182 state->unit[i].wrap_mode = RC_WRAP_REPEAT; 183 break; 184 185 case PIPE_TEX_WRAP_MIRROR_REPEAT: 186 state->unit[i].wrap_mode = RC_WRAP_MIRRORED_REPEAT; 187 break; 188 189 case PIPE_TEX_WRAP_MIRROR_CLAMP: 190 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE: 191 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER: 192 state->unit[i].wrap_mode = RC_WRAP_MIRRORED_CLAMP; 193 break; 194 195 default: 196 state->unit[i].wrap_mode = RC_WRAP_NONE; 197 } 198 199 if (t->b.target == PIPE_TEXTURE_3D) 200 state->unit[i].clamp_and_scale_before_fetch = TRUE; 201 } 202 } 203} 204 205static void r300_translate_fragment_shader( 206 struct r300_context* r300, 207 struct r300_fragment_shader_code* shader, 208 const struct tgsi_token *tokens); 209 210static void r300_dummy_fragment_shader( 211 struct r300_context* r300, 212 struct r300_fragment_shader_code* shader) 213{ 214 struct pipe_shader_state state; 215 struct ureg_program *ureg; 216 struct ureg_dst out; 217 struct ureg_src imm; 218 219 /* Make a simple fragment shader which outputs (0, 0, 0, 1) */ 220 ureg = ureg_create(PIPE_SHADER_FRAGMENT); 221 out = ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 0); 222 imm = ureg_imm4f(ureg, 0, 0, 0, 1); 223 224 ureg_MOV(ureg, out, imm); 225 ureg_END(ureg); 226 227 state.tokens = ureg_finalize(ureg); 228 229 shader->dummy = TRUE; 230 r300_translate_fragment_shader(r300, shader, state.tokens); 231 232 ureg_destroy(ureg); 233} 234 235static void r300_emit_fs_code_to_buffer( 236 struct r300_context *r300, 237 struct r300_fragment_shader_code *shader) 238{ 239 struct rX00_fragment_program_code *generic_code = &shader->code; 240 unsigned imm_count = shader->immediates_count; 241 unsigned imm_first = shader->externals_count; 242 unsigned imm_end = generic_code->constants.Count; 243 struct rc_constant *constants = generic_code->constants.Constants; 244 unsigned i; 245 CB_LOCALS; 246 247 if (r300->screen->caps.is_r500) { 248 struct r500_fragment_program_code *code = &generic_code->code.r500; 249 250 shader->cb_code_size = 19 + 251 ((code->inst_end + 1) * 6) + 252 imm_count * 7 + 253 code->int_constant_count * 2; 254 255 NEW_CB(shader->cb_code, shader->cb_code_size); 256 OUT_CB_REG(R500_US_CONFIG, R500_ZERO_TIMES_ANYTHING_EQUALS_ZERO); 257 OUT_CB_REG(R500_US_PIXSIZE, code->max_temp_idx); 258 OUT_CB_REG(R500_US_FC_CTRL, code->us_fc_ctrl); 259 for(i = 0; i < code->int_constant_count; i++){ 260 OUT_CB_REG(R500_US_FC_INT_CONST_0 + (i * 4), 261 code->int_constants[i]); 262 } 263 OUT_CB_REG(R500_US_CODE_RANGE, 264 R500_US_CODE_RANGE_ADDR(0) | R500_US_CODE_RANGE_SIZE(code->inst_end)); 265 OUT_CB_REG(R500_US_CODE_OFFSET, 0); 266 OUT_CB_REG(R500_US_CODE_ADDR, 267 R500_US_CODE_START_ADDR(0) | R500_US_CODE_END_ADDR(code->inst_end)); 268 269 OUT_CB_REG(R500_GA_US_VECTOR_INDEX, R500_GA_US_VECTOR_INDEX_TYPE_INSTR); 270 OUT_CB_ONE_REG(R500_GA_US_VECTOR_DATA, (code->inst_end + 1) * 6); 271 for (i = 0; i <= code->inst_end; i++) { 272 OUT_CB(code->inst[i].inst0); 273 OUT_CB(code->inst[i].inst1); 274 OUT_CB(code->inst[i].inst2); 275 OUT_CB(code->inst[i].inst3); 276 OUT_CB(code->inst[i].inst4); 277 OUT_CB(code->inst[i].inst5); 278 } 279 280 /* Emit immediates. */ 281 if (imm_count) { 282 for(i = imm_first; i < imm_end; ++i) { 283 if (constants[i].Type == RC_CONSTANT_IMMEDIATE) { 284 const float *data = constants[i].u.Immediate; 285 286 OUT_CB_REG(R500_GA_US_VECTOR_INDEX, 287 R500_GA_US_VECTOR_INDEX_TYPE_CONST | 288 (i & R500_GA_US_VECTOR_INDEX_MASK)); 289 OUT_CB_ONE_REG(R500_GA_US_VECTOR_DATA, 4); 290 OUT_CB_TABLE(data, 4); 291 } 292 } 293 } 294 } else { /* r300 */ 295 struct r300_fragment_program_code *code = &generic_code->code.r300; 296 unsigned int alu_length = code->alu.length; 297 unsigned int alu_iterations = ((alu_length - 1) / 64) + 1; 298 unsigned int tex_length = code->tex.length; 299 unsigned int tex_iterations = 300 tex_length > 0 ? ((tex_length - 1) / 32) + 1 : 0; 301 unsigned int iterations = 302 alu_iterations > tex_iterations ? alu_iterations : tex_iterations; 303 unsigned int bank = 0; 304 305 shader->cb_code_size = 15 + 306 /* R400_US_CODE_BANK */ 307 (r300->screen->caps.is_r400 ? 2 * (iterations + 1): 0) + 308 /* R400_US_CODE_EXT */ 309 (r300->screen->caps.is_r400 ? 2 : 0) + 310 /* R300_US_ALU_{RGB,ALPHA}_{INST,ADDR}_0, R400_US_ALU_EXT_ADDR_0 */ 311 (code->r390_mode ? (5 * alu_iterations) : 4) + 312 /* R400_US_ALU_EXT_ADDR_[0-63] */ 313 (code->r390_mode ? (code->alu.length) : 0) + 314 /* R300_US_ALU_{RGB,ALPHA}_{INST,ADDR}_0 */ 315 code->alu.length * 4 + 316 /* R300_US_TEX_INST_0, R300_US_TEX_INST_[0-31] */ 317 (code->tex.length > 0 ? code->tex.length + tex_iterations : 0) + 318 imm_count * 5; 319 320 NEW_CB(shader->cb_code, shader->cb_code_size); 321 322 OUT_CB_REG(R300_US_CONFIG, code->config); 323 OUT_CB_REG(R300_US_PIXSIZE, code->pixsize); 324 OUT_CB_REG(R300_US_CODE_OFFSET, code->code_offset); 325 326 if (code->r390_mode) { 327 OUT_CB_REG(R400_US_CODE_EXT, code->r400_code_offset_ext); 328 } else if (r300->screen->caps.is_r400) { 329 /* This register appears to affect shaders even if r390_mode is 330 * disabled, so it needs to be set to 0 for shaders that 331 * don't use r390_mode. */ 332 OUT_CB_REG(R400_US_CODE_EXT, 0); 333 } 334 335 OUT_CB_REG_SEQ(R300_US_CODE_ADDR_0, 4); 336 OUT_CB_TABLE(code->code_addr, 4); 337 338 do { 339 unsigned int bank_alu_length = (alu_length < 64 ? alu_length : 64); 340 unsigned int bank_alu_offset = bank * 64; 341 unsigned int bank_tex_length = (tex_length < 32 ? tex_length : 32); 342 unsigned int bank_tex_offset = bank * 32; 343 344 if (r300->screen->caps.is_r400) { 345 OUT_CB_REG(R400_US_CODE_BANK, code->r390_mode ? 346 (bank << R400_BANK_SHIFT) | R400_R390_MODE_ENABLE : 0);//2 347 } 348 349 if (bank_alu_length > 0) { 350 OUT_CB_REG_SEQ(R300_US_ALU_RGB_INST_0, bank_alu_length); 351 for (i = 0; i < bank_alu_length; i++) 352 OUT_CB(code->alu.inst[i + bank_alu_offset].rgb_inst); 353 354 OUT_CB_REG_SEQ(R300_US_ALU_RGB_ADDR_0, bank_alu_length); 355 for (i = 0; i < bank_alu_length; i++) 356 OUT_CB(code->alu.inst[i + bank_alu_offset].rgb_addr); 357 358 OUT_CB_REG_SEQ(R300_US_ALU_ALPHA_INST_0, bank_alu_length); 359 for (i = 0; i < bank_alu_length; i++) 360 OUT_CB(code->alu.inst[i + bank_alu_offset].alpha_inst); 361 362 OUT_CB_REG_SEQ(R300_US_ALU_ALPHA_ADDR_0, bank_alu_length); 363 for (i = 0; i < bank_alu_length; i++) 364 OUT_CB(code->alu.inst[i + bank_alu_offset].alpha_addr); 365 366 if (code->r390_mode) { 367 OUT_CB_REG_SEQ(R400_US_ALU_EXT_ADDR_0, bank_alu_length); 368 for (i = 0; i < bank_alu_length; i++) 369 OUT_CB(code->alu.inst[i + bank_alu_offset].r400_ext_addr); 370 } 371 } 372 373 if (bank_tex_length > 0) { 374 OUT_CB_REG_SEQ(R300_US_TEX_INST_0, bank_tex_length); 375 OUT_CB_TABLE(code->tex.inst + bank_tex_offset, bank_tex_length); 376 } 377 378 alu_length -= bank_alu_length; 379 tex_length -= bank_tex_length; 380 bank++; 381 } while(code->r390_mode && (alu_length > 0 || tex_length > 0)); 382 383 /* R400_US_CODE_BANK needs to be reset to 0, otherwise some shaders 384 * will be rendered incorrectly. */ 385 if (r300->screen->caps.is_r400) { 386 OUT_CB_REG(R400_US_CODE_BANK, 387 code->r390_mode ? R400_R390_MODE_ENABLE : 0); 388 } 389 390 /* Emit immediates. */ 391 if (imm_count) { 392 for(i = imm_first; i < imm_end; ++i) { 393 if (constants[i].Type == RC_CONSTANT_IMMEDIATE) { 394 const float *data = constants[i].u.Immediate; 395 396 OUT_CB_REG_SEQ(R300_PFS_PARAM_0_X + i * 16, 4); 397 OUT_CB(pack_float24(data[0])); 398 OUT_CB(pack_float24(data[1])); 399 OUT_CB(pack_float24(data[2])); 400 OUT_CB(pack_float24(data[3])); 401 } 402 } 403 } 404 } 405 406 OUT_CB_REG(R300_FG_DEPTH_SRC, shader->fg_depth_src); 407 OUT_CB_REG(R300_US_W_FMT, shader->us_out_w); 408 END_CB; 409} 410 411static void r300_translate_fragment_shader( 412 struct r300_context* r300, 413 struct r300_fragment_shader_code* shader, 414 const struct tgsi_token *tokens) 415{ 416 struct r300_fragment_program_compiler compiler; 417 struct tgsi_to_rc ttr; 418 int wpos, face; 419 unsigned i; 420 421 tgsi_scan_shader(tokens, &shader->info); 422 r300_shader_read_fs_inputs(&shader->info, &shader->inputs); 423 424 wpos = shader->inputs.wpos; 425 face = shader->inputs.face; 426 427 /* Setup the compiler. */ 428 memset(&compiler, 0, sizeof(compiler)); 429 rc_init(&compiler.Base, &r300->fs_regalloc_state); 430 DBG_ON(r300, DBG_FP) ? compiler.Base.Debug |= RC_DBG_LOG : 0; 431 432 compiler.code = &shader->code; 433 compiler.state = shader->compare_state; 434 if (!shader->dummy) 435 compiler.Base.debug = &r300->debug; 436 compiler.Base.is_r500 = r300->screen->caps.is_r500; 437 compiler.Base.is_r400 = r300->screen->caps.is_r400; 438 compiler.Base.disable_optimizations = DBG_ON(r300, DBG_NO_OPT); 439 compiler.Base.has_half_swizzles = TRUE; 440 compiler.Base.has_presub = TRUE; 441 compiler.Base.has_omod = TRUE; 442 compiler.Base.needs_trig_input_transform = DBG_ON(r300, DBG_USE_TGSI); 443 compiler.Base.max_temp_regs = 444 compiler.Base.is_r500 ? 128 : (compiler.Base.is_r400 ? 64 : 32); 445 compiler.Base.max_constants = compiler.Base.is_r500 ? 256 : 32; 446 compiler.Base.max_alu_insts = 447 (compiler.Base.is_r500 || compiler.Base.is_r400) ? 512 : 64; 448 compiler.Base.max_tex_insts = 449 (compiler.Base.is_r500 || compiler.Base.is_r400) ? 512 : 32; 450 compiler.AllocateHwInputs = &allocate_hardware_inputs; 451 compiler.UserData = &shader->inputs; 452 453 find_output_registers(&compiler, shader); 454 455 shader->write_all = 456 shader->info.properties[TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS]; 457 458 if (compiler.Base.Debug & RC_DBG_LOG) { 459 DBG(r300, DBG_FP, "r300: Initial fragment program\n"); 460 tgsi_dump(tokens, 0); 461 } 462 463 /* Translate TGSI to our internal representation */ 464 ttr.compiler = &compiler.Base; 465 ttr.info = &shader->info; 466 ttr.use_half_swizzles = TRUE; 467 468 r300_tgsi_to_rc(&ttr, tokens); 469 470 if (ttr.error) { 471 fprintf(stderr, "r300 FP: Cannot translate a shader. " 472 "Using a dummy shader instead.\n"); 473 r300_dummy_fragment_shader(r300, shader); 474 return; 475 } 476 477 if (!r300->screen->caps.is_r500 || 478 compiler.Base.Program.Constants.Count > 200) { 479 compiler.Base.remove_unused_constants = TRUE; 480 } 481 482 /** 483 * Transform the program to support WPOS. 484 * 485 * Introduce a small fragment at the start of the program that will be 486 * the only code that directly reads the WPOS input. 487 * All other code pieces that reference that input will be rewritten 488 * to read from a newly allocated temporary. */ 489 if (wpos != ATTR_UNUSED) { 490 /* Moving the input to some other reg is not really necessary. */ 491 rc_transform_fragment_wpos(&compiler.Base, wpos, wpos, TRUE); 492 } 493 494 if (face != ATTR_UNUSED) { 495 rc_transform_fragment_face(&compiler.Base, face); 496 } 497 498 /* Invoke the compiler */ 499 r3xx_compile_fragment_program(&compiler); 500 501 if (compiler.Base.Error) { 502 fprintf(stderr, "r300 FP: Compiler Error:\n%sUsing a dummy shader" 503 " instead.\n", compiler.Base.ErrorMsg); 504 505 if (shader->dummy) { 506 fprintf(stderr, "r300 FP: Cannot compile the dummy shader! " 507 "Giving up...\n"); 508 abort(); 509 } 510 511 rc_destroy(&compiler.Base); 512 r300_dummy_fragment_shader(r300, shader); 513 return; 514 } 515 516 /* Shaders with zero instructions are invalid, 517 * use the dummy shader instead. */ 518 if (shader->code.code.r500.inst_end == -1) { 519 rc_destroy(&compiler.Base); 520 r300_dummy_fragment_shader(r300, shader); 521 return; 522 } 523 524 /* Initialize numbers of constants for each type. */ 525 shader->externals_count = 0; 526 for (i = 0; 527 i < shader->code.constants.Count && 528 shader->code.constants.Constants[i].Type == RC_CONSTANT_EXTERNAL; i++) { 529 shader->externals_count = i+1; 530 } 531 shader->immediates_count = 0; 532 shader->rc_state_count = 0; 533 534 for (i = shader->externals_count; i < shader->code.constants.Count; i++) { 535 switch (shader->code.constants.Constants[i].Type) { 536 case RC_CONSTANT_IMMEDIATE: 537 ++shader->immediates_count; 538 break; 539 case RC_CONSTANT_STATE: 540 ++shader->rc_state_count; 541 break; 542 default: 543 assert(0); 544 } 545 } 546 547 /* Setup shader depth output. */ 548 if (shader->code.writes_depth) { 549 shader->fg_depth_src = R300_FG_DEPTH_SRC_SHADER; 550 shader->us_out_w = R300_W_FMT_W24 | R300_W_SRC_US; 551 } else { 552 shader->fg_depth_src = R300_FG_DEPTH_SRC_SCAN; 553 shader->us_out_w = R300_W_FMT_W0 | R300_W_SRC_US; 554 } 555 556 /* And, finally... */ 557 rc_destroy(&compiler.Base); 558 559 /* Build the command buffer. */ 560 r300_emit_fs_code_to_buffer(r300, shader); 561} 562 563boolean r300_pick_fragment_shader(struct r300_context *r300, 564 struct r300_fragment_shader* fs, 565 struct r300_fragment_program_external_state *state) 566{ 567 struct r300_fragment_shader_code* ptr; 568 569 if (!fs->first) { 570 /* Build the fragment shader for the first time. */ 571 fs->first = fs->shader = CALLOC_STRUCT(r300_fragment_shader_code); 572 573 memcpy(&fs->shader->compare_state, state, sizeof(*state)); 574 r300_translate_fragment_shader(r300, fs->shader, fs->state.tokens); 575 return TRUE; 576 577 } else { 578 /* Check if the currently-bound shader has been compiled 579 * with the texture-compare state we need. */ 580 if (memcmp(&fs->shader->compare_state, state, sizeof(*state)) != 0) { 581 /* Search for the right shader. */ 582 ptr = fs->first; 583 while (ptr) { 584 if (memcmp(&ptr->compare_state, state, sizeof(*state)) == 0) { 585 if (fs->shader != ptr) { 586 fs->shader = ptr; 587 return TRUE; 588 } 589 /* The currently-bound one is OK. */ 590 return FALSE; 591 } 592 ptr = ptr->next; 593 } 594 595 /* Not found, gotta compile a new one. */ 596 ptr = CALLOC_STRUCT(r300_fragment_shader_code); 597 ptr->next = fs->first; 598 fs->first = fs->shader = ptr; 599 600 memcpy(&ptr->compare_state, state, sizeof(*state)); 601 r300_translate_fragment_shader(r300, ptr, fs->state.tokens); 602 return TRUE; 603 } 604 } 605 606 return FALSE; 607} 608