GrDrawTarget.cpp revision 97805382d89b717de3355312a79a957ea4a864c9
1 2/* 3 * Copyright 2010 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 11#include "GrDrawTarget.h" 12#include "GrGpuVertex.h" 13#include "GrIndexBuffer.h" 14#include "GrRenderTarget.h" 15#include "GrTexture.h" 16#include "GrVertexBuffer.h" 17 18namespace { 19 20/** 21 * This function generates some masks that we like to have known at compile 22 * time. When the number of stages or tex coords is bumped or the way bits 23 * are defined in GrDrawTarget.h changes this funcion should be rerun to 24 * generate the new masks. (We attempted to force the compiler to generate the 25 * masks using recursive templates but always wound up with static initializers 26 * under gcc, even if they were just a series of immediate->memory moves.) 27 * 28 */ 29void gen_mask_arrays(GrVertexLayout* stageTexCoordMasks, 30 GrVertexLayout* stageMasks, 31 GrVertexLayout* texCoordMasks) { 32 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 33 stageTexCoordMasks[s] = 0; 34 for (int t = 0; t < GrDrawState::kMaxTexCoords; ++t) { 35 stageTexCoordMasks[s] |= GrDrawTarget::StageTexCoordVertexLayoutBit(s, t); 36 } 37 stageMasks[s] = stageTexCoordMasks[s] | GrDrawTarget::StagePosAsTexCoordVertexLayoutBit(s); 38 } 39 for (int t = 0; t < GrDrawState::kMaxTexCoords; ++t) { 40 texCoordMasks[t] = 0; 41 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 42 texCoordMasks[t] |= GrDrawTarget::StageTexCoordVertexLayoutBit(s, t); 43 } 44 } 45} 46 47/** 48 * Run this function to generate the code that declares the global masks. 49 */ 50void gen_globals() { 51 GrVertexLayout stageTexCoordMasks[GrDrawState::kNumStages]; 52 GrVertexLayout stageMasks[GrDrawState::kNumStages]; 53 GrVertexLayout texCoordMasks[GrDrawState::kMaxTexCoords]; 54 gen_mask_arrays(stageTexCoordMasks, stageMasks, texCoordMasks); 55 56 GrPrintf("const GrVertexLayout gStageTexCoordMasks[] = {\n"); 57 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 58 GrPrintf(" 0x%x,\n", stageTexCoordMasks[s]); 59 } 60 GrPrintf("};\n"); 61 GrPrintf("GR_STATIC_ASSERT(GrDrawState::kNumStages == GR_ARRAY_COUNT(gStageTexCoordMasks));\n\n"); 62 GrPrintf("const GrVertexLayout gStageMasks[] = {\n"); 63 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 64 GrPrintf(" 0x%x,\n", stageMasks[s]); 65 } 66 GrPrintf("};\n"); 67 GrPrintf("GR_STATIC_ASSERT(GrDrawState::kNumStages == GR_ARRAY_COUNT(gStageMasks));\n\n"); 68 GrPrintf("const GrVertexLayout gTexCoordMasks[] = {\n"); 69 for (int t = 0; t < GrDrawState::kMaxTexCoords; ++t) { 70 GrPrintf(" 0x%x,\n", texCoordMasks[t]); 71 } 72 GrPrintf("};\n"); 73 GrPrintf("GR_STATIC_ASSERT(GrDrawState::kMaxTexCoords == GR_ARRAY_COUNT(gTexCoordMasks));\n"); 74} 75 76/* These values were generated by the above function */ 77const GrVertexLayout gStageTexCoordMasks[] = { 78 0x49, 79 0x92, 80 0x124 81}; 82 83GR_STATIC_ASSERT(GrDrawState::kNumStages == GR_ARRAY_COUNT(gStageTexCoordMasks)); 84const GrVertexLayout gStageMasks[] = { 85 0x249, 86 0x492, 87 0x924 88}; 89 90GR_STATIC_ASSERT(GrDrawState::kNumStages == GR_ARRAY_COUNT(gStageMasks)); 91const GrVertexLayout gTexCoordMasks[] = { 92 0x7, 93 0x38, 94 0x1c0, 95}; 96GR_STATIC_ASSERT(GrDrawState::kMaxTexCoords == GR_ARRAY_COUNT(gTexCoordMasks)); 97 98bool check_layout(GrVertexLayout layout) { 99 // can only have 1 or 0 bits set for each stage. 100 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 101 int stageBits = layout & gStageMasks[s]; 102 if (stageBits && !GrIsPow2(stageBits)) { 103 return false; 104 } 105 } 106 return true; 107} 108 109int num_tex_coords(GrVertexLayout layout) { 110 int cnt = 0; 111 // figure out how many tex coordinates are present 112 for (int t = 0; t < GrDrawState::kMaxTexCoords; ++t) { 113 if (gTexCoordMasks[t] & layout) { 114 ++cnt; 115 } 116 } 117 return cnt; 118} 119 120} //unnamed namespace 121 122size_t GrDrawTarget::VertexSize(GrVertexLayout vertexLayout) { 123 GrAssert(check_layout(vertexLayout)); 124 125 size_t vecSize = (vertexLayout & kTextFormat_VertexLayoutBit) ? 126 sizeof(GrGpuTextVertex) : 127 sizeof(GrPoint); 128 129 size_t size = vecSize; // position 130 size += num_tex_coords(vertexLayout) * vecSize; 131 if (vertexLayout & kColor_VertexLayoutBit) { 132 size += sizeof(GrColor); 133 } 134 if (vertexLayout & kCoverage_VertexLayoutBit) { 135 size += sizeof(GrColor); 136 } 137 if (vertexLayout & kEdge_VertexLayoutBit) { 138 size += 4 * sizeof(GrScalar); 139 } 140 return size; 141} 142 143//////////////////////////////////////////////////////////////////////////////// 144 145/** 146 * Functions for computing offsets of various components from the layout 147 * bitfield. 148 * 149 * Order of vertex components: 150 * Position 151 * Tex Coord 0 152 * ... 153 * Tex Coord GrDrawState::kMaxTexCoords-1 154 * Color 155 * Coverage 156 */ 157 158int GrDrawTarget::VertexStageCoordOffset(int stage, GrVertexLayout vertexLayout) { 159 GrAssert(check_layout(vertexLayout)); 160 if (StagePosAsTexCoordVertexLayoutBit(stage) & vertexLayout) { 161 return 0; 162 } 163 int tcIdx = VertexTexCoordsForStage(stage, vertexLayout); 164 if (tcIdx >= 0) { 165 166 int vecSize = (vertexLayout & kTextFormat_VertexLayoutBit) ? 167 sizeof(GrGpuTextVertex) : 168 sizeof(GrPoint); 169 int offset = vecSize; // position 170 // figure out how many tex coordinates are present and precede this one. 171 for (int t = 0; t < tcIdx; ++t) { 172 if (gTexCoordMasks[t] & vertexLayout) { 173 offset += vecSize; 174 } 175 } 176 return offset; 177 } 178 179 return -1; 180} 181 182int GrDrawTarget::VertexColorOffset(GrVertexLayout vertexLayout) { 183 GrAssert(check_layout(vertexLayout)); 184 185 if (vertexLayout & kColor_VertexLayoutBit) { 186 int vecSize = (vertexLayout & kTextFormat_VertexLayoutBit) ? 187 sizeof(GrGpuTextVertex) : 188 sizeof(GrPoint); 189 return vecSize * (num_tex_coords(vertexLayout) + 1); //+1 for pos 190 } 191 return -1; 192} 193 194int GrDrawTarget::VertexCoverageOffset(GrVertexLayout vertexLayout) { 195 GrAssert(check_layout(vertexLayout)); 196 197 if (vertexLayout & kCoverage_VertexLayoutBit) { 198 int vecSize = (vertexLayout & kTextFormat_VertexLayoutBit) ? 199 sizeof(GrGpuTextVertex) : 200 sizeof(GrPoint); 201 202 int offset = vecSize * (num_tex_coords(vertexLayout) + 1); 203 if (vertexLayout & kColor_VertexLayoutBit) { 204 offset += sizeof(GrColor); 205 } 206 return offset; 207 } 208 return -1; 209} 210 211int GrDrawTarget::VertexEdgeOffset(GrVertexLayout vertexLayout) { 212 GrAssert(check_layout(vertexLayout)); 213 214 // edge pts are after the pos, tex coords, and color 215 if (vertexLayout & kEdge_VertexLayoutBit) { 216 int vecSize = (vertexLayout & kTextFormat_VertexLayoutBit) ? 217 sizeof(GrGpuTextVertex) : 218 sizeof(GrPoint); 219 int offset = vecSize * (num_tex_coords(vertexLayout) + 1); //+1 for pos 220 if (vertexLayout & kColor_VertexLayoutBit) { 221 offset += sizeof(GrColor); 222 } 223 if (vertexLayout & kCoverage_VertexLayoutBit) { 224 offset += sizeof(GrColor); 225 } 226 return offset; 227 } 228 return -1; 229} 230 231int GrDrawTarget::VertexSizeAndOffsetsByIdx( 232 GrVertexLayout vertexLayout, 233 int texCoordOffsetsByIdx[GrDrawState::kMaxTexCoords], 234 int* colorOffset, 235 int* coverageOffset, 236 int* edgeOffset) { 237 GrAssert(check_layout(vertexLayout)); 238 239 int vecSize = (vertexLayout & kTextFormat_VertexLayoutBit) ? 240 sizeof(GrGpuTextVertex) : 241 sizeof(GrPoint); 242 int size = vecSize; // position 243 244 for (int t = 0; t < GrDrawState::kMaxTexCoords; ++t) { 245 if (gTexCoordMasks[t] & vertexLayout) { 246 if (NULL != texCoordOffsetsByIdx) { 247 texCoordOffsetsByIdx[t] = size; 248 } 249 size += vecSize; 250 } else { 251 if (NULL != texCoordOffsetsByIdx) { 252 texCoordOffsetsByIdx[t] = -1; 253 } 254 } 255 } 256 if (kColor_VertexLayoutBit & vertexLayout) { 257 if (NULL != colorOffset) { 258 *colorOffset = size; 259 } 260 size += sizeof(GrColor); 261 } else { 262 if (NULL != colorOffset) { 263 *colorOffset = -1; 264 } 265 } 266 if (kCoverage_VertexLayoutBit & vertexLayout) { 267 if (NULL != coverageOffset) { 268 *coverageOffset = size; 269 } 270 size += sizeof(GrColor); 271 } else { 272 if (NULL != coverageOffset) { 273 *coverageOffset = -1; 274 } 275 } 276 if (kEdge_VertexLayoutBit & vertexLayout) { 277 if (NULL != edgeOffset) { 278 *edgeOffset = size; 279 } 280 size += 4 * sizeof(GrScalar); 281 } else { 282 if (NULL != edgeOffset) { 283 *edgeOffset = -1; 284 } 285 } 286 return size; 287} 288 289int GrDrawTarget::VertexSizeAndOffsetsByStage( 290 GrVertexLayout vertexLayout, 291 int texCoordOffsetsByStage[GrDrawState::kNumStages], 292 int* colorOffset, 293 int* coverageOffset, 294 int* edgeOffset) { 295 GrAssert(check_layout(vertexLayout)); 296 297 int texCoordOffsetsByIdx[GrDrawState::kMaxTexCoords]; 298 int size = VertexSizeAndOffsetsByIdx(vertexLayout, 299 (NULL == texCoordOffsetsByStage) ? 300 NULL : 301 texCoordOffsetsByIdx, 302 colorOffset, 303 coverageOffset, 304 edgeOffset); 305 if (NULL != texCoordOffsetsByStage) { 306 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 307 int tcIdx; 308 if (StagePosAsTexCoordVertexLayoutBit(s) & vertexLayout) { 309 texCoordOffsetsByStage[s] = 0; 310 } else if ((tcIdx = VertexTexCoordsForStage(s, vertexLayout)) >= 0) { 311 texCoordOffsetsByStage[s] = texCoordOffsetsByIdx[tcIdx]; 312 } else { 313 texCoordOffsetsByStage[s] = -1; 314 } 315 } 316 } 317 return size; 318} 319 320//////////////////////////////////////////////////////////////////////////////// 321 322bool GrDrawTarget::VertexUsesStage(int stage, GrVertexLayout vertexLayout) { 323 GrAssert(stage < GrDrawState::kNumStages); 324 GrAssert(check_layout(vertexLayout)); 325 return !!(gStageMasks[stage] & vertexLayout); 326} 327 328bool GrDrawTarget::VertexUsesTexCoordIdx(int coordIndex, 329 GrVertexLayout vertexLayout) { 330 GrAssert(coordIndex < GrDrawState::kMaxTexCoords); 331 GrAssert(check_layout(vertexLayout)); 332 return !!(gTexCoordMasks[coordIndex] & vertexLayout); 333} 334 335int GrDrawTarget::VertexTexCoordsForStage(int stage, 336 GrVertexLayout vertexLayout) { 337 GrAssert(stage < GrDrawState::kNumStages); 338 GrAssert(check_layout(vertexLayout)); 339 int bit = vertexLayout & gStageTexCoordMasks[stage]; 340 if (bit) { 341 // figure out which set of texture coordates is used 342 // bits are ordered T0S0, T0S1, T0S2, ..., T1S0, T1S1, ... 343 // and start at bit 0. 344 GR_STATIC_ASSERT(sizeof(GrVertexLayout) <= sizeof(uint32_t)); 345 return (32 - Gr_clz(bit) - 1) / GrDrawState::kNumStages; 346 } 347 return -1; 348} 349 350//////////////////////////////////////////////////////////////////////////////// 351 352void GrDrawTarget::VertexLayoutUnitTest() { 353 // Ensure that our globals mask arrays are correct 354 GrVertexLayout stageTexCoordMasks[GrDrawState::kNumStages]; 355 GrVertexLayout stageMasks[GrDrawState::kNumStages]; 356 GrVertexLayout texCoordMasks[GrDrawState::kMaxTexCoords]; 357 gen_mask_arrays(stageTexCoordMasks, stageMasks, texCoordMasks); 358 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 359 GrAssert(stageTexCoordMasks[s] == gStageTexCoordMasks[s]); 360 GrAssert(stageMasks[s] == gStageMasks[s]); 361 } 362 for (int t = 0; t < GrDrawState::kMaxTexCoords; ++t) { 363 GrAssert(texCoordMasks[t] == gTexCoordMasks[t]); 364 } 365 366 // not necessarily exhaustive 367 static bool run; 368 if (!run) { 369 run = true; 370 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 371 372 GrAssert(!VertexUsesStage(s, 0)); 373 GrAssert(-1 == VertexStageCoordOffset(s, 0)); 374 GrVertexLayout stageMask = 0; 375 for (int t = 0; t < GrDrawState::kMaxTexCoords; ++t) { 376 stageMask |= StageTexCoordVertexLayoutBit(s,t); 377 } 378 GrAssert(1 == GrDrawState::kMaxTexCoords || 379 !check_layout(stageMask)); 380 GrAssert(gStageTexCoordMasks[s] == stageMask); 381 stageMask |= StagePosAsTexCoordVertexLayoutBit(s); 382 GrAssert(gStageMasks[s] == stageMask); 383 GrAssert(!check_layout(stageMask)); 384 } 385 for (int t = 0; t < GrDrawState::kMaxTexCoords; ++t) { 386 GrVertexLayout tcMask = 0; 387 GrAssert(!VertexUsesTexCoordIdx(t, 0)); 388 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 389 tcMask |= StageTexCoordVertexLayoutBit(s,t); 390 GrAssert(VertexUsesStage(s, tcMask)); 391 GrAssert(sizeof(GrPoint) == VertexStageCoordOffset(s, tcMask)); 392 GrAssert(VertexUsesTexCoordIdx(t, tcMask)); 393 GrAssert(2*sizeof(GrPoint) == VertexSize(tcMask)); 394 GrAssert(t == VertexTexCoordsForStage(s, tcMask)); 395 for (int s2 = s + 1; s2 < GrDrawState::kNumStages; ++s2) { 396 GrAssert(-1 == VertexStageCoordOffset(s2, tcMask)); 397 GrAssert(!VertexUsesStage(s2, tcMask)); 398 GrAssert(-1 == VertexTexCoordsForStage(s2, tcMask)); 399 400 #if GR_DEBUG 401 GrVertexLayout posAsTex = tcMask | StagePosAsTexCoordVertexLayoutBit(s2); 402 #endif 403 GrAssert(0 == VertexStageCoordOffset(s2, posAsTex)); 404 GrAssert(VertexUsesStage(s2, posAsTex)); 405 GrAssert(2*sizeof(GrPoint) == VertexSize(posAsTex)); 406 GrAssert(-1 == VertexTexCoordsForStage(s2, posAsTex)); 407 GrAssert(-1 == VertexEdgeOffset(posAsTex)); 408 } 409 GrAssert(-1 == VertexEdgeOffset(tcMask)); 410 GrAssert(-1 == VertexColorOffset(tcMask)); 411 GrAssert(-1 == VertexCoverageOffset(tcMask)); 412 #if GR_DEBUG 413 GrVertexLayout withColor = tcMask | kColor_VertexLayoutBit; 414 #endif 415 GrAssert(-1 == VertexCoverageOffset(withColor)); 416 GrAssert(2*sizeof(GrPoint) == VertexColorOffset(withColor)); 417 GrAssert(2*sizeof(GrPoint) + sizeof(GrColor) == VertexSize(withColor)); 418 #if GR_DEBUG 419 GrVertexLayout withEdge = tcMask | kEdge_VertexLayoutBit; 420 #endif 421 GrAssert(-1 == VertexColorOffset(withEdge)); 422 GrAssert(2*sizeof(GrPoint) == VertexEdgeOffset(withEdge)); 423 GrAssert(4*sizeof(GrPoint) == VertexSize(withEdge)); 424 #if GR_DEBUG 425 GrVertexLayout withColorAndEdge = withColor | kEdge_VertexLayoutBit; 426 #endif 427 GrAssert(2*sizeof(GrPoint) == VertexColorOffset(withColorAndEdge)); 428 GrAssert(2*sizeof(GrPoint) + sizeof(GrColor) == VertexEdgeOffset(withColorAndEdge)); 429 GrAssert(4*sizeof(GrPoint) + sizeof(GrColor) == VertexSize(withColorAndEdge)); 430 #if GR_DEBUG 431 GrVertexLayout withCoverage = tcMask | kCoverage_VertexLayoutBit; 432 #endif 433 GrAssert(-1 == VertexColorOffset(withCoverage)); 434 GrAssert(2*sizeof(GrPoint) == VertexCoverageOffset(withCoverage)); 435 GrAssert(2*sizeof(GrPoint) + sizeof(GrColor) == VertexSize(withCoverage)); 436 #if GR_DEBUG 437 GrVertexLayout withCoverageAndColor = tcMask | kCoverage_VertexLayoutBit | 438 kColor_VertexLayoutBit; 439 #endif 440 GrAssert(2*sizeof(GrPoint) == VertexColorOffset(withCoverageAndColor)); 441 GrAssert(2*sizeof(GrPoint) + sizeof(GrColor) == VertexCoverageOffset(withCoverageAndColor)); 442 GrAssert(2*sizeof(GrPoint) + 2 * sizeof(GrColor) == VertexSize(withCoverageAndColor)); 443 } 444 GrAssert(gTexCoordMasks[t] == tcMask); 445 GrAssert(check_layout(tcMask)); 446 447 int stageOffsets[GrDrawState::kNumStages]; 448 int colorOffset; 449 int edgeOffset; 450 int coverageOffset; 451 int size; 452 size = VertexSizeAndOffsetsByStage(tcMask, 453 stageOffsets, &colorOffset, 454 &coverageOffset, &edgeOffset); 455 GrAssert(2*sizeof(GrPoint) == size); 456 GrAssert(-1 == colorOffset); 457 GrAssert(-1 == coverageOffset); 458 GrAssert(-1 == edgeOffset); 459 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 460 GrAssert(VertexUsesStage(s, tcMask)); 461 GrAssert(sizeof(GrPoint) == stageOffsets[s]); 462 GrAssert(sizeof(GrPoint) == VertexStageCoordOffset(s, tcMask)); 463 } 464 } 465 } 466} 467 468//////////////////////////////////////////////////////////////////////////////// 469 470#define DEBUG_INVAL_BUFFER 0xdeadcafe 471#define DEBUG_INVAL_START_IDX -1 472 473GrDrawTarget::GrDrawTarget() { 474#if GR_DEBUG 475 VertexLayoutUnitTest(); 476#endif 477 GeometrySrcState& geoSrc = fGeoSrcStateStack.push_back(); 478#if GR_DEBUG 479 geoSrc.fVertexCount = DEBUG_INVAL_START_IDX; 480 geoSrc.fVertexBuffer = (GrVertexBuffer*)DEBUG_INVAL_BUFFER; 481 geoSrc.fIndexCount = DEBUG_INVAL_START_IDX; 482 geoSrc.fIndexBuffer = (GrIndexBuffer*)DEBUG_INVAL_BUFFER; 483#endif 484 geoSrc.fVertexSrc = kNone_GeometrySrcType; 485 geoSrc.fIndexSrc = kNone_GeometrySrcType; 486} 487 488GrDrawTarget::~GrDrawTarget() { 489 GrAssert(1 == fGeoSrcStateStack.count()); 490 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 491 GrAssert(kNone_GeometrySrcType == geoSrc.fIndexSrc); 492 GrAssert(kNone_GeometrySrcType == geoSrc.fVertexSrc); 493} 494 495void GrDrawTarget::releaseGeometry() { 496 int popCnt = fGeoSrcStateStack.count() - 1; 497 while (popCnt) { 498 this->popGeometrySource(); 499 --popCnt; 500 } 501 this->resetVertexSource(); 502 this->resetIndexSource(); 503} 504 505void GrDrawTarget::setClip(const GrClip& clip) { 506 clipWillBeSet(clip); 507 fClip = clip; 508} 509 510const GrClip& GrDrawTarget::getClip() const { 511 return fClip; 512} 513 514void GrDrawTarget::saveCurrentDrawState(SavedDrawState* state) const { 515 state->fState.set(fCurrDrawState); 516} 517 518void GrDrawTarget::restoreDrawState(const SavedDrawState& state) { 519 fCurrDrawState = *state.fState.get(); 520} 521 522void GrDrawTarget::copyDrawState(const GrDrawTarget& srcTarget) { 523 fCurrDrawState = srcTarget.fCurrDrawState; 524} 525 526bool GrDrawTarget::reserveVertexSpace(GrVertexLayout vertexLayout, 527 int vertexCount, 528 void** vertices) { 529 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 530 bool acquired = false; 531 if (vertexCount > 0) { 532 GrAssert(NULL != vertices); 533 this->releasePreviousVertexSource(); 534 geoSrc.fVertexSrc = kNone_GeometrySrcType; 535 536 acquired = this->onReserveVertexSpace(vertexLayout, 537 vertexCount, 538 vertices); 539 } 540 if (acquired) { 541 geoSrc.fVertexSrc = kReserved_GeometrySrcType; 542 geoSrc.fVertexCount = vertexCount; 543 geoSrc.fVertexLayout = vertexLayout; 544 } else if (NULL != vertices) { 545 *vertices = NULL; 546 } 547 return acquired; 548} 549 550bool GrDrawTarget::reserveIndexSpace(int indexCount, 551 void** indices) { 552 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 553 bool acquired = false; 554 if (indexCount > 0) { 555 GrAssert(NULL != indices); 556 this->releasePreviousIndexSource(); 557 geoSrc.fIndexSrc = kNone_GeometrySrcType; 558 559 acquired = this->onReserveIndexSpace(indexCount, indices); 560 } 561 if (acquired) { 562 geoSrc.fIndexSrc = kReserved_GeometrySrcType; 563 geoSrc.fIndexCount = indexCount; 564 } else if (NULL != indices) { 565 *indices = NULL; 566 } 567 return acquired; 568 569} 570 571bool GrDrawTarget::reserveVertexAndIndexSpace(GrVertexLayout vertexLayout, 572 int vertexCount, 573 int indexCount, 574 void** vertices, 575 void** indices) { 576 this->willReserveVertexAndIndexSpace(vertexLayout, vertexCount, indexCount); 577 if (vertexCount) { 578 if (!this->reserveVertexSpace(vertexLayout, vertexCount, vertices)) { 579 if (indexCount) { 580 this->resetIndexSource(); 581 } 582 return false; 583 } 584 } 585 if (indexCount) { 586 if (!this->reserveIndexSpace(indexCount, indices)) { 587 if (vertexCount) { 588 this->resetVertexSource(); 589 } 590 return false; 591 } 592 } 593 return true; 594} 595 596bool GrDrawTarget::geometryHints(GrVertexLayout vertexLayout, 597 int32_t* vertexCount, 598 int32_t* indexCount) const { 599 if (NULL != vertexCount) { 600 *vertexCount = -1; 601 } 602 if (NULL != indexCount) { 603 *indexCount = -1; 604 } 605 return false; 606} 607 608void GrDrawTarget::releasePreviousVertexSource() { 609 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 610 switch (geoSrc.fVertexSrc) { 611 case kNone_GeometrySrcType: 612 break; 613 case kArray_GeometrySrcType: 614 this->releaseVertexArray(); 615 break; 616 case kReserved_GeometrySrcType: 617 this->releaseReservedVertexSpace(); 618 break; 619 case kBuffer_GeometrySrcType: 620 geoSrc.fVertexBuffer->unref(); 621#if GR_DEBUG 622 geoSrc.fVertexBuffer = (GrVertexBuffer*)DEBUG_INVAL_BUFFER; 623#endif 624 break; 625 default: 626 GrCrash("Unknown Vertex Source Type."); 627 break; 628 } 629} 630 631void GrDrawTarget::releasePreviousIndexSource() { 632 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 633 switch (geoSrc.fIndexSrc) { 634 case kNone_GeometrySrcType: // these two don't require 635 break; 636 case kArray_GeometrySrcType: 637 this->releaseIndexArray(); 638 break; 639 case kReserved_GeometrySrcType: 640 this->releaseReservedIndexSpace(); 641 break; 642 case kBuffer_GeometrySrcType: 643 geoSrc.fIndexBuffer->unref(); 644#if GR_DEBUG 645 geoSrc.fIndexBuffer = (GrIndexBuffer*)DEBUG_INVAL_BUFFER; 646#endif 647 break; 648 default: 649 GrCrash("Unknown Index Source Type."); 650 break; 651 } 652} 653 654void GrDrawTarget::setVertexSourceToArray(GrVertexLayout vertexLayout, 655 const void* vertexArray, 656 int vertexCount) { 657 this->releasePreviousVertexSource(); 658 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 659 geoSrc.fVertexSrc = kArray_GeometrySrcType; 660 geoSrc.fVertexLayout = vertexLayout; 661 geoSrc.fVertexCount = vertexCount; 662 this->onSetVertexSourceToArray(vertexArray, vertexCount); 663} 664 665void GrDrawTarget::setIndexSourceToArray(const void* indexArray, 666 int indexCount) { 667 this->releasePreviousIndexSource(); 668 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 669 geoSrc.fIndexSrc = kArray_GeometrySrcType; 670 geoSrc.fIndexCount = indexCount; 671 this->onSetIndexSourceToArray(indexArray, indexCount); 672} 673 674void GrDrawTarget::setVertexSourceToBuffer(GrVertexLayout vertexLayout, 675 const GrVertexBuffer* buffer) { 676 this->releasePreviousVertexSource(); 677 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 678 geoSrc.fVertexSrc = kBuffer_GeometrySrcType; 679 geoSrc.fVertexBuffer = buffer; 680 buffer->ref(); 681 geoSrc.fVertexLayout = vertexLayout; 682} 683 684void GrDrawTarget::setIndexSourceToBuffer(const GrIndexBuffer* buffer) { 685 this->releasePreviousIndexSource(); 686 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 687 geoSrc.fIndexSrc = kBuffer_GeometrySrcType; 688 geoSrc.fIndexBuffer = buffer; 689 buffer->ref(); 690} 691 692void GrDrawTarget::resetVertexSource() { 693 this->releasePreviousVertexSource(); 694 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 695 geoSrc.fVertexSrc = kNone_GeometrySrcType; 696} 697 698void GrDrawTarget::resetIndexSource() { 699 this->releasePreviousIndexSource(); 700 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 701 geoSrc.fIndexSrc = kNone_GeometrySrcType; 702} 703 704void GrDrawTarget::pushGeometrySource() { 705 this->geometrySourceWillPush(); 706 GeometrySrcState& newState = fGeoSrcStateStack.push_back(); 707 newState.fIndexSrc = kNone_GeometrySrcType; 708 newState.fVertexSrc = kNone_GeometrySrcType; 709#if GR_DEBUG 710 newState.fVertexCount = ~0; 711 newState.fVertexBuffer = (GrVertexBuffer*)~0; 712 newState.fIndexCount = ~0; 713 newState.fIndexBuffer = (GrIndexBuffer*)~0; 714#endif 715} 716 717void GrDrawTarget::popGeometrySource() { 718 const GeometrySrcState& geoSrc = this->getGeomSrc(); 719 // if popping last element then pops are unbalanced with pushes 720 GrAssert(fGeoSrcStateStack.count() > 1); 721 722 this->geometrySourceWillPop(fGeoSrcStateStack.fromBack(1)); 723 this->releasePreviousVertexSource(); 724 this->releasePreviousIndexSource(); 725 fGeoSrcStateStack.pop_back(); 726} 727 728//////////////////////////////////////////////////////////////////////////////// 729 730bool GrDrawTarget::checkDraw(GrPrimitiveType type, int startVertex, 731 int startIndex, int vertexCount, 732 int indexCount) const { 733#if GR_DEBUG 734 const GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 735 int maxVertex = startVertex + vertexCount; 736 int maxValidVertex; 737 switch (geoSrc.fVertexSrc) { 738 case kNone_GeometrySrcType: 739 GrCrash("Attempting to draw without vertex src."); 740 case kReserved_GeometrySrcType: // fallthrough 741 case kArray_GeometrySrcType: 742 maxValidVertex = geoSrc.fVertexCount; 743 break; 744 case kBuffer_GeometrySrcType: 745 maxValidVertex = geoSrc.fVertexBuffer->sizeInBytes() / 746 VertexSize(geoSrc.fVertexLayout); 747 break; 748 } 749 if (maxVertex > maxValidVertex) { 750 GrCrash("Drawing outside valid vertex range."); 751 } 752 if (indexCount > 0) { 753 int maxIndex = startIndex + indexCount; 754 int maxValidIndex; 755 switch (geoSrc.fIndexSrc) { 756 case kNone_GeometrySrcType: 757 GrCrash("Attempting to draw indexed geom without index src."); 758 case kReserved_GeometrySrcType: // fallthrough 759 case kArray_GeometrySrcType: 760 maxValidIndex = geoSrc.fIndexCount; 761 break; 762 case kBuffer_GeometrySrcType: 763 maxValidIndex = geoSrc.fIndexBuffer->sizeInBytes() / sizeof(uint16_t); 764 break; 765 } 766 if (maxIndex > maxValidIndex) { 767 GrCrash("Index reads outside valid index range."); 768 } 769 } 770#endif 771 const GrDrawState& drawState = this->getDrawState(); 772 if (NULL == drawState.getRenderTarget()) { 773 return false; 774 } 775 if (GrPixelConfigIsUnpremultiplied(drawState.getRenderTarget()->config())) { 776 if (kOne_BlendCoeff != drawState.getSrcBlendCoeff() || 777 kZero_BlendCoeff != drawState.getDstBlendCoeff()) { 778 return false; 779 } 780 } 781 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 782 // We don't support using unpremultiplied textures with filters (other 783 // than nearest). Alpha-premulling is not distributive WRT to filtering. 784 // We'd have to filter each texel before filtering. We could do this for 785 // our custom filters but we would also have to disable bilerp and do 786 // a custom bilerp in the shader. Until Skia itself supports unpremul 787 // configs there is no pressure to implement this. 788 if (this->isStageEnabled(s) && 789 GrPixelConfigIsUnpremultiplied(drawState.getTexture(s)->config()) && 790 GrSamplerState::kNearest_Filter != 791 drawState.getSampler(s).getFilter()) { 792 return false; 793 } 794 } 795 return true; 796} 797 798void GrDrawTarget::drawIndexed(GrPrimitiveType type, int startVertex, 799 int startIndex, int vertexCount, 800 int indexCount) { 801 if (indexCount > 0 && 802 this->checkDraw(type, startVertex, startIndex, 803 vertexCount, indexCount)) { 804 this->onDrawIndexed(type, startVertex, startIndex, 805 vertexCount, indexCount); 806 } 807} 808 809void GrDrawTarget::drawNonIndexed(GrPrimitiveType type, 810 int startVertex, 811 int vertexCount) { 812 if (vertexCount > 0 && 813 this->checkDraw(type, startVertex, -1, vertexCount, -1)) { 814 this->onDrawNonIndexed(type, startVertex, vertexCount); 815 } 816} 817 818//////////////////////////////////////////////////////////////////////////////// 819 820// Some blend modes allow folding a partial coverage value into the color's 821// alpha channel, while others will blend incorrectly. 822bool GrDrawTarget::canTweakAlphaForCoverage() const { 823 /** 824 * The fractional coverage is f 825 * The src and dst coeffs are Cs and Cd 826 * The dst and src colors are S and D 827 * We want the blend to compute: f*Cs*S + (f*Cd + (1-f))D 828 * By tweaking the source color's alpha we're replacing S with S'=fS. It's 829 * obvious that that first term will always be ok. The second term can be 830 * rearranged as [1-(1-Cd)f]D. By substituing in the various possbilities 831 * for Cd we find that only 1, ISA, and ISC produce the correct depth 832 * coeffecient in terms of S' and D. 833 */ 834 GrBlendCoeff dstCoeff = this->getDrawState().getDstBlendCoeff(); 835 return kOne_BlendCoeff == dstCoeff || 836 kISA_BlendCoeff == dstCoeff || 837 kISC_BlendCoeff == dstCoeff; 838} 839 840 841bool GrDrawTarget::srcAlphaWillBeOne() const { 842 const GrVertexLayout& layout = this->getGeomSrc().fVertexLayout; 843 const GrDrawState& drawState = this->getDrawState(); 844 845 // Check if per-vertex or constant color may have partial alpha 846 if ((layout & kColor_VertexLayoutBit) || 847 0xff != GrColorUnpackA(drawState.getColor())) { 848 return false; 849 } 850 // Check if color filter could introduce an alpha 851 // (TODO: Consider being more aggressive with regards to detecting 0xff 852 // final alpha from color filter). 853 if (SkXfermode::kDst_Mode != drawState.getColorFilterMode()) { 854 return false; 855 } 856 // Check if a color stage could create a partial alpha 857 for (int s = 0; s < drawState.getFirstCoverageStage(); ++s) { 858 if (StageWillBeUsed(s, layout, fCurrDrawState)) { 859 GrAssert(NULL != drawState.getTexture(s)); 860 GrPixelConfig config = drawState.getTexture(s)->config(); 861 if (!GrPixelConfigIsOpaque(config)) { 862 return false; 863 } 864 } 865 } 866 return true; 867} 868 869GrDrawTarget::BlendOptFlags 870GrDrawTarget::getBlendOpts(bool forceCoverage, 871 GrBlendCoeff* srcCoeff, 872 GrBlendCoeff* dstCoeff) const { 873 874 const GrVertexLayout& layout = this->getGeomSrc().fVertexLayout; 875 const GrDrawState& drawState = this->getDrawState(); 876 877 GrBlendCoeff bogusSrcCoeff, bogusDstCoeff; 878 if (NULL == srcCoeff) { 879 srcCoeff = &bogusSrcCoeff; 880 } 881 *srcCoeff = drawState.getSrcBlendCoeff(); 882 883 if (NULL == dstCoeff) { 884 dstCoeff = &bogusDstCoeff; 885 } 886 *dstCoeff = drawState.getDstBlendCoeff(); 887 888 // We don't ever expect source coeffecients to reference the source 889 GrAssert(kSA_BlendCoeff != *srcCoeff && 890 kISA_BlendCoeff != *srcCoeff && 891 kSC_BlendCoeff != *srcCoeff && 892 kISC_BlendCoeff != *srcCoeff); 893 // same for dst 894 GrAssert(kDA_BlendCoeff != *dstCoeff && 895 kIDA_BlendCoeff != *dstCoeff && 896 kDC_BlendCoeff != *dstCoeff && 897 kIDC_BlendCoeff != *dstCoeff); 898 899 if (drawState.isColorWriteDisabled()) { 900 *srcCoeff = kZero_BlendCoeff; 901 *dstCoeff = kOne_BlendCoeff; 902 } 903 904 bool srcAIsOne = this->srcAlphaWillBeOne(); 905 bool dstCoeffIsOne = kOne_BlendCoeff == *dstCoeff || 906 (kSA_BlendCoeff == *dstCoeff && srcAIsOne); 907 bool dstCoeffIsZero = kZero_BlendCoeff == *dstCoeff || 908 (kISA_BlendCoeff == *dstCoeff && srcAIsOne); 909 910 911 // When coeffs are (0,1) there is no reason to draw at all, unless 912 // stenciling is enabled. Having color writes disabled is effectively 913 // (0,1). The same applies when coverage is known to be 0. 914 if ((kZero_BlendCoeff == *srcCoeff && dstCoeffIsOne) || 915 (!(layout & kCoverage_VertexLayoutBit) && 916 0 == drawState.getCoverage())) { 917 if (drawState.getStencil().doesWrite()) { 918 return kDisableBlend_BlendOptFlag | 919 kEmitTransBlack_BlendOptFlag; 920 } else { 921 return kSkipDraw_BlendOptFlag; 922 } 923 } 924 925 // check for coverage due to constant coverage, per-vertex coverage, 926 // edge aa or coverage texture stage 927 bool hasCoverage = forceCoverage || 928 0xffffffff != drawState.getCoverage() || 929 drawState.getNumAAEdges() > 0 || 930 (layout & kCoverage_VertexLayoutBit) || 931 (layout & kEdge_VertexLayoutBit); 932 for (int s = drawState.getFirstCoverageStage(); 933 !hasCoverage && s < GrDrawState::kNumStages; 934 ++s) { 935 if (StageWillBeUsed(s, layout, fCurrDrawState)) { 936 hasCoverage = true; 937 } 938 } 939 940 // if we don't have coverage we can check whether the dst 941 // has to read at all. If not, we'll disable blending. 942 if (!hasCoverage) { 943 if (dstCoeffIsZero) { 944 if (kOne_BlendCoeff == *srcCoeff) { 945 // if there is no coverage and coeffs are (1,0) then we 946 // won't need to read the dst at all, it gets replaced by src 947 return kDisableBlend_BlendOptFlag; 948 } else if (kZero_BlendCoeff == *srcCoeff) { 949 // if the op is "clear" then we don't need to emit a color 950 // or blend, just write transparent black into the dst. 951 *srcCoeff = kOne_BlendCoeff; 952 *dstCoeff = kZero_BlendCoeff; 953 return kDisableBlend_BlendOptFlag | 954 kEmitTransBlack_BlendOptFlag; 955 } 956 } 957 } else { 958 // check whether coverage can be safely rolled into alpha 959 // of if we can skip color computation and just emit coverage 960 if (this->canTweakAlphaForCoverage()) { 961 return kCoverageAsAlpha_BlendOptFlag; 962 } 963 if (dstCoeffIsZero) { 964 if (kZero_BlendCoeff == *srcCoeff) { 965 // the source color is not included in the blend 966 // the dst coeff is effectively zero so blend works out to: 967 // (c)(0)D + (1-c)D = (1-c)D. 968 *dstCoeff = kISA_BlendCoeff; 969 return kEmitCoverage_BlendOptFlag; 970 } else if (srcAIsOne) { 971 // the dst coeff is effectively zero so blend works out to: 972 // cS + (c)(0)D + (1-c)D = cS + (1-c)D. 973 // If Sa is 1 then we can replace Sa with c 974 // and set dst coeff to 1-Sa. 975 *dstCoeff = kISA_BlendCoeff; 976 return kCoverageAsAlpha_BlendOptFlag; 977 } 978 } else if (dstCoeffIsOne) { 979 // the dst coeff is effectively one so blend works out to: 980 // cS + (c)(1)D + (1-c)D = cS + D. 981 *dstCoeff = kOne_BlendCoeff; 982 return kCoverageAsAlpha_BlendOptFlag; 983 } 984 } 985 return kNone_BlendOpt; 986} 987 988bool GrDrawTarget::willUseHWAALines() const { 989 // there is a conflict between using smooth lines and our use of 990 // premultiplied alpha. Smooth lines tweak the incoming alpha value 991 // but not in a premul-alpha way. So we only use them when our alpha 992 // is 0xff and tweaking the color for partial coverage is OK 993 if (!fCaps.fHWAALineSupport || 994 !this->getDrawState().isHWAntialiasState()) { 995 return false; 996 } 997 BlendOptFlags opts = this->getBlendOpts(); 998 return (kDisableBlend_BlendOptFlag & opts) && 999 (kCoverageAsAlpha_BlendOptFlag & opts); 1000} 1001 1002bool GrDrawTarget::canApplyCoverage() const { 1003 // we can correctly apply coverage if a) we have dual source blending 1004 // or b) one of our blend optimizations applies. 1005 return this->getCaps().fDualSourceBlendingSupport || 1006 kNone_BlendOpt != this->getBlendOpts(true); 1007} 1008 1009bool GrDrawTarget::drawWillReadDst() const { 1010 return SkToBool((kDisableBlend_BlendOptFlag | kSkipDraw_BlendOptFlag) & 1011 this->getBlendOpts()); 1012} 1013 1014 1015//////////////////////////////////////////////////////////////////////////////// 1016 1017void GrDrawTarget::drawRect(const GrRect& rect, 1018 const GrMatrix* matrix, 1019 StageMask stageMask, 1020 const GrRect* srcRects[], 1021 const GrMatrix* srcMatrices[]) { 1022 GrVertexLayout layout = GetRectVertexLayout(stageMask, srcRects); 1023 1024 AutoReleaseGeometry geo(this, layout, 4, 0); 1025 if (!geo.succeeded()) { 1026 GrPrintf("Failed to get space for vertices!\n"); 1027 return; 1028 } 1029 1030 SetRectVertices(rect, matrix, srcRects, 1031 srcMatrices, layout, geo.vertices()); 1032 1033 drawNonIndexed(kTriangleFan_PrimitiveType, 0, 4); 1034} 1035 1036GrVertexLayout GrDrawTarget::GetRectVertexLayout(StageMask stageMask, 1037 const GrRect* srcRects[]) { 1038 GrVertexLayout layout = 0; 1039 1040 for (int i = 0; i < GrDrawState::kNumStages; ++i) { 1041 int numTC = 0; 1042 if (stageMask & (1 << i)) { 1043 if (NULL != srcRects && NULL != srcRects[i]) { 1044 layout |= StageTexCoordVertexLayoutBit(i, numTC); 1045 ++numTC; 1046 } else { 1047 layout |= StagePosAsTexCoordVertexLayoutBit(i); 1048 } 1049 } 1050 } 1051 return layout; 1052} 1053 1054void GrDrawTarget::clipWillBeSet(const GrClip& clip) { 1055} 1056 1057void GrDrawTarget::SetRectVertices(const GrRect& rect, 1058 const GrMatrix* matrix, 1059 const GrRect* srcRects[], 1060 const GrMatrix* srcMatrices[], 1061 GrVertexLayout layout, 1062 void* vertices) { 1063#if GR_DEBUG 1064 // check that the layout and srcRects agree 1065 for (int i = 0; i < GrDrawState::kNumStages; ++i) { 1066 if (VertexTexCoordsForStage(i, layout) >= 0) { 1067 GR_DEBUGASSERT(NULL != srcRects && NULL != srcRects[i]); 1068 } else { 1069 GR_DEBUGASSERT(NULL == srcRects || NULL == srcRects[i]); 1070 } 1071 } 1072#endif 1073 1074 int stageOffsets[GrDrawState::kNumStages]; 1075 int vsize = VertexSizeAndOffsetsByStage(layout, stageOffsets, 1076 NULL, NULL, NULL); 1077 1078 GrTCast<GrPoint*>(vertices)->setRectFan(rect.fLeft, rect.fTop, 1079 rect.fRight, rect.fBottom, 1080 vsize); 1081 if (NULL != matrix) { 1082 matrix->mapPointsWithStride(GrTCast<GrPoint*>(vertices), vsize, 4); 1083 } 1084 1085 for (int i = 0; i < GrDrawState::kNumStages; ++i) { 1086 if (stageOffsets[i] > 0) { 1087 GrPoint* coords = GrTCast<GrPoint*>(GrTCast<intptr_t>(vertices) + 1088 stageOffsets[i]); 1089 coords->setRectFan(srcRects[i]->fLeft, srcRects[i]->fTop, 1090 srcRects[i]->fRight, srcRects[i]->fBottom, 1091 vsize); 1092 if (NULL != srcMatrices && NULL != srcMatrices[i]) { 1093 srcMatrices[i]->mapPointsWithStride(coords, vsize, 4); 1094 } 1095 } 1096 } 1097} 1098 1099//////////////////////////////////////////////////////////////////////////////// 1100 1101GrDrawTarget::AutoStateRestore::AutoStateRestore() { 1102 fDrawTarget = NULL; 1103} 1104 1105GrDrawTarget::AutoStateRestore::AutoStateRestore(GrDrawTarget* target) { 1106 fDrawTarget = target; 1107 if (NULL != fDrawTarget) { 1108 fDrawTarget->saveCurrentDrawState(&fDrawState); 1109 } 1110} 1111 1112GrDrawTarget::AutoStateRestore::~AutoStateRestore() { 1113 if (NULL != fDrawTarget) { 1114 fDrawTarget->restoreDrawState(fDrawState); 1115 } 1116} 1117 1118void GrDrawTarget::AutoStateRestore::set(GrDrawTarget* target) { 1119 if (target != fDrawTarget) { 1120 if (NULL != fDrawTarget) { 1121 fDrawTarget->restoreDrawState(fDrawState); 1122 } 1123 if (NULL != target) { 1124 target->saveCurrentDrawState(&fDrawState); 1125 } 1126 fDrawTarget = target; 1127 } 1128} 1129 1130//////////////////////////////////////////////////////////////////////////////// 1131 1132GrDrawTarget::AutoDeviceCoordDraw::AutoDeviceCoordDraw( 1133 GrDrawTarget* target, 1134 GrDrawState::StageMask stageMask) { 1135 GrAssert(NULL != target); 1136 GrDrawState* drawState = target->drawState(); 1137 1138 fDrawTarget = target; 1139 fViewMatrix = drawState->getViewMatrix(); 1140 fStageMask = stageMask; 1141 if (fStageMask) { 1142 GrMatrix invVM; 1143 if (fViewMatrix.invert(&invVM)) { 1144 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 1145 if (fStageMask & (1 << s)) { 1146 fSamplerMatrices[s] = drawState->getSampler(s).getMatrix(); 1147 } 1148 } 1149 drawState->preConcatSamplerMatrices(fStageMask, invVM); 1150 } else { 1151 // sad trombone sound 1152 fStageMask = 0; 1153 } 1154 } 1155 drawState->setViewMatrix(GrMatrix::I()); 1156} 1157 1158GrDrawTarget::AutoDeviceCoordDraw::~AutoDeviceCoordDraw() { 1159 GrDrawState* drawState = fDrawTarget->drawState(); 1160 drawState->setViewMatrix(fViewMatrix); 1161 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 1162 if (fStageMask & (1 << s)) { 1163 *drawState->sampler(s)->matrix() = fSamplerMatrices[s]; 1164 } 1165 } 1166} 1167 1168//////////////////////////////////////////////////////////////////////////////// 1169 1170GrDrawTarget::AutoReleaseGeometry::AutoReleaseGeometry( 1171 GrDrawTarget* target, 1172 GrVertexLayout vertexLayout, 1173 int vertexCount, 1174 int indexCount) { 1175 fTarget = NULL; 1176 this->set(target, vertexLayout, vertexCount, indexCount); 1177} 1178 1179GrDrawTarget::AutoReleaseGeometry::AutoReleaseGeometry() { 1180 fTarget = NULL; 1181} 1182 1183GrDrawTarget::AutoReleaseGeometry::~AutoReleaseGeometry() { 1184 this->reset(); 1185} 1186 1187bool GrDrawTarget::AutoReleaseGeometry::set(GrDrawTarget* target, 1188 GrVertexLayout vertexLayout, 1189 int vertexCount, 1190 int indexCount) { 1191 this->reset(); 1192 fTarget = target; 1193 bool success = true; 1194 if (NULL != fTarget) { 1195 fTarget = target; 1196 success = target->reserveVertexAndIndexSpace(vertexLayout, 1197 vertexCount, 1198 indexCount, 1199 &fVertices, 1200 &fIndices); 1201 if (!success) { 1202 fTarget = NULL; 1203 this->reset(); 1204 } 1205 } 1206 GrAssert(success == (NULL != fTarget)); 1207 return success; 1208} 1209 1210void GrDrawTarget::AutoReleaseGeometry::reset() { 1211 if (NULL != fTarget) { 1212 if (NULL != fVertices) { 1213 fTarget->resetVertexSource(); 1214 } 1215 if (NULL != fIndices) { 1216 fTarget->resetIndexSource(); 1217 } 1218 fTarget = NULL; 1219 } 1220 fVertices = NULL; 1221 fIndices = NULL; 1222} 1223 1224void GrDrawTarget::Caps::print() const { 1225 static const char* gNY[] = {"NO", "YES"}; 1226 GrPrintf("8 Bit Palette Support : %s\n", gNY[f8BitPaletteSupport]); 1227 GrPrintf("NPOT Texture Tile Support : %s\n", gNY[fNPOTTextureTileSupport]); 1228 GrPrintf("Two Sided Stencil Support : %s\n", gNY[fTwoSidedStencilSupport]); 1229 GrPrintf("Stencil Wrap Ops Support : %s\n", gNY[fStencilWrapOpsSupport]); 1230 GrPrintf("HW AA Lines Support : %s\n", gNY[fHWAALineSupport]); 1231 GrPrintf("Shader Derivative Support : %s\n", gNY[fShaderDerivativeSupport]); 1232 GrPrintf("Geometry Shader Support : %s\n", gNY[fGeometryShaderSupport]); 1233 GrPrintf("FSAA Support : %s\n", gNY[fFSAASupport]); 1234 GrPrintf("Dual Source Blending Support: %s\n", gNY[fDualSourceBlendingSupport]); 1235 GrPrintf("Buffer Lock Support : %s\n", gNY[fBufferLockSupport]); 1236 GrPrintf("Max Texture Size : %d\n", fMaxTextureSize); 1237 GrPrintf("Max Render Target Size : %d\n", fMaxRenderTargetSize); 1238} 1239 1240