GrDrawTarget.cpp revision e3d7095c2374a423815e662020459832f389a40f
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 if (vertexCount) { 577 if (!this->reserveVertexSpace(vertexLayout, vertexCount, vertices)) { 578 if (indexCount) { 579 this->resetIndexSource(); 580 } 581 return false; 582 } 583 } 584 if (indexCount) { 585 if (!this->reserveIndexSpace(indexCount, indices)) { 586 if (vertexCount) { 587 this->resetVertexSource(); 588 } 589 return false; 590 } 591 } 592 return true; 593} 594 595bool GrDrawTarget::geometryHints(GrVertexLayout vertexLayout, 596 int32_t* vertexCount, 597 int32_t* indexCount) const { 598 if (NULL != vertexCount) { 599 *vertexCount = -1; 600 } 601 if (NULL != indexCount) { 602 *indexCount = -1; 603 } 604 return false; 605} 606 607void GrDrawTarget::releasePreviousVertexSource() { 608 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 609 switch (geoSrc.fVertexSrc) { 610 case kNone_GeometrySrcType: 611 break; 612 case kArray_GeometrySrcType: 613 this->releaseVertexArray(); 614 break; 615 case kReserved_GeometrySrcType: 616 this->releaseReservedVertexSpace(); 617 break; 618 case kBuffer_GeometrySrcType: 619 geoSrc.fVertexBuffer->unref(); 620#if GR_DEBUG 621 geoSrc.fVertexBuffer = (GrVertexBuffer*)DEBUG_INVAL_BUFFER; 622#endif 623 break; 624 default: 625 GrCrash("Unknown Vertex Source Type."); 626 break; 627 } 628} 629 630void GrDrawTarget::releasePreviousIndexSource() { 631 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 632 switch (geoSrc.fIndexSrc) { 633 case kNone_GeometrySrcType: // these two don't require 634 break; 635 case kArray_GeometrySrcType: 636 this->releaseIndexArray(); 637 break; 638 case kReserved_GeometrySrcType: 639 this->releaseReservedIndexSpace(); 640 break; 641 case kBuffer_GeometrySrcType: 642 geoSrc.fIndexBuffer->unref(); 643#if GR_DEBUG 644 geoSrc.fIndexBuffer = (GrIndexBuffer*)DEBUG_INVAL_BUFFER; 645#endif 646 break; 647 default: 648 GrCrash("Unknown Index Source Type."); 649 break; 650 } 651} 652 653void GrDrawTarget::setVertexSourceToArray(GrVertexLayout vertexLayout, 654 const void* vertexArray, 655 int vertexCount) { 656 this->releasePreviousVertexSource(); 657 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 658 geoSrc.fVertexSrc = kArray_GeometrySrcType; 659 geoSrc.fVertexLayout = vertexLayout; 660 geoSrc.fVertexCount = vertexCount; 661 this->onSetVertexSourceToArray(vertexArray, vertexCount); 662} 663 664void GrDrawTarget::setIndexSourceToArray(const void* indexArray, 665 int indexCount) { 666 this->releasePreviousIndexSource(); 667 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 668 geoSrc.fIndexSrc = kArray_GeometrySrcType; 669 geoSrc.fIndexCount = indexCount; 670 this->onSetIndexSourceToArray(indexArray, indexCount); 671} 672 673void GrDrawTarget::setVertexSourceToBuffer(GrVertexLayout vertexLayout, 674 const GrVertexBuffer* buffer) { 675 this->releasePreviousVertexSource(); 676 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 677 geoSrc.fVertexSrc = kBuffer_GeometrySrcType; 678 geoSrc.fVertexBuffer = buffer; 679 buffer->ref(); 680 geoSrc.fVertexLayout = vertexLayout; 681} 682 683void GrDrawTarget::setIndexSourceToBuffer(const GrIndexBuffer* buffer) { 684 this->releasePreviousIndexSource(); 685 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 686 geoSrc.fIndexSrc = kBuffer_GeometrySrcType; 687 geoSrc.fIndexBuffer = buffer; 688 buffer->ref(); 689} 690 691void GrDrawTarget::resetVertexSource() { 692 this->releasePreviousVertexSource(); 693 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 694 geoSrc.fVertexSrc = kNone_GeometrySrcType; 695} 696 697void GrDrawTarget::resetIndexSource() { 698 this->releasePreviousIndexSource(); 699 GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 700 geoSrc.fIndexSrc = kNone_GeometrySrcType; 701} 702 703void GrDrawTarget::pushGeometrySource() { 704 this->geometrySourceWillPush(); 705 GeometrySrcState& newState = fGeoSrcStateStack.push_back(); 706 newState.fIndexSrc = kNone_GeometrySrcType; 707 newState.fVertexSrc = kNone_GeometrySrcType; 708#if GR_DEBUG 709 newState.fVertexCount = ~0; 710 newState.fVertexBuffer = (GrVertexBuffer*)~0; 711 newState.fIndexCount = ~0; 712 newState.fIndexBuffer = (GrIndexBuffer*)~0; 713#endif 714} 715 716void GrDrawTarget::popGeometrySource() { 717 const GeometrySrcState& geoSrc = this->getGeomSrc(); 718 // if popping last element then pops are unbalanced with pushes 719 GrAssert(fGeoSrcStateStack.count() > 1); 720 721 this->geometrySourceWillPop(fGeoSrcStateStack.fromBack(1)); 722 this->releasePreviousVertexSource(); 723 this->releasePreviousIndexSource(); 724 fGeoSrcStateStack.pop_back(); 725} 726 727//////////////////////////////////////////////////////////////////////////////// 728 729bool GrDrawTarget::checkDraw(GrPrimitiveType type, int startVertex, 730 int startIndex, int vertexCount, 731 int indexCount) const { 732#if GR_DEBUG 733 const GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); 734 int maxVertex = startVertex + vertexCount; 735 int maxValidVertex; 736 switch (geoSrc.fVertexSrc) { 737 case kNone_GeometrySrcType: 738 GrCrash("Attempting to draw without vertex src."); 739 case kReserved_GeometrySrcType: // fallthrough 740 case kArray_GeometrySrcType: 741 maxValidVertex = geoSrc.fVertexCount; 742 break; 743 case kBuffer_GeometrySrcType: 744 maxValidVertex = geoSrc.fVertexBuffer->sizeInBytes() / 745 VertexSize(geoSrc.fVertexLayout); 746 break; 747 } 748 if (maxVertex > maxValidVertex) { 749 GrCrash("Drawing outside valid vertex range."); 750 } 751 if (indexCount > 0) { 752 int maxIndex = startIndex + indexCount; 753 int maxValidIndex; 754 switch (geoSrc.fIndexSrc) { 755 case kNone_GeometrySrcType: 756 GrCrash("Attempting to draw indexed geom without index src."); 757 case kReserved_GeometrySrcType: // fallthrough 758 case kArray_GeometrySrcType: 759 maxValidIndex = geoSrc.fIndexCount; 760 break; 761 case kBuffer_GeometrySrcType: 762 maxValidIndex = geoSrc.fIndexBuffer->sizeInBytes() / sizeof(uint16_t); 763 break; 764 } 765 if (maxIndex > maxValidIndex) { 766 GrCrash("Index reads outside valid index range."); 767 } 768 } 769#endif 770 const GrDrawState& drawState = this->getDrawState(); 771 if (NULL == drawState.getRenderTarget()) { 772 return false; 773 } 774 if (GrPixelConfigIsUnpremultiplied(drawState.getRenderTarget()->config())) { 775 if (kOne_BlendCoeff != drawState.getSrcBlendCoeff() || 776 kZero_BlendCoeff != drawState.getDstBlendCoeff()) { 777 return false; 778 } 779 } 780 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 781 // We don't support using unpremultiplied textures with filters (other 782 // than nearest). Alpha-premulling is not distributive WRT to filtering. 783 // We'd have to filter each texel before filtering. We could do this for 784 // our custom filters but we would also have to disable bilerp and do 785 // a custom bilerp in the shader. Until Skia itself supports unpremul 786 // configs there is no pressure to implement this. 787 if (this->isStageEnabled(s) && 788 GrPixelConfigIsUnpremultiplied(drawState.getTexture(s)->config()) && 789 GrSamplerState::kNearest_Filter != 790 drawState.getSampler(s).getFilter()) { 791 return false; 792 } 793 } 794 return true; 795} 796 797void GrDrawTarget::drawIndexed(GrPrimitiveType type, int startVertex, 798 int startIndex, int vertexCount, 799 int indexCount) { 800 if (indexCount > 0 && 801 this->checkDraw(type, startVertex, startIndex, 802 vertexCount, indexCount)) { 803 this->onDrawIndexed(type, startVertex, startIndex, 804 vertexCount, indexCount); 805 } 806} 807 808void GrDrawTarget::drawNonIndexed(GrPrimitiveType type, 809 int startVertex, 810 int vertexCount) { 811 if (vertexCount > 0 && 812 this->checkDraw(type, startVertex, -1, vertexCount, -1)) { 813 this->onDrawNonIndexed(type, startVertex, vertexCount); 814 } 815} 816 817//////////////////////////////////////////////////////////////////////////////// 818 819// Some blend modes allow folding a partial coverage value into the color's 820// alpha channel, while others will blend incorrectly. 821bool GrDrawTarget::canTweakAlphaForCoverage() const { 822 /** 823 * The fractional coverage is f 824 * The src and dst coeffs are Cs and Cd 825 * The dst and src colors are S and D 826 * We want the blend to compute: f*Cs*S + (f*Cd + (1-f))D 827 * By tweaking the source color's alpha we're replacing S with S'=fS. It's 828 * obvious that that first term will always be ok. The second term can be 829 * rearranged as [1-(1-Cd)f]D. By substituing in the various possbilities 830 * for Cd we find that only 1, ISA, and ISC produce the correct depth 831 * coeffecient in terms of S' and D. 832 */ 833 GrBlendCoeff dstCoeff = this->getDrawState().getDstBlendCoeff(); 834 return kOne_BlendCoeff == dstCoeff || 835 kISA_BlendCoeff == dstCoeff || 836 kISC_BlendCoeff == dstCoeff; 837} 838 839 840bool GrDrawTarget::srcAlphaWillBeOne() const { 841 const GrVertexLayout& layout = this->getGeomSrc().fVertexLayout; 842 const GrDrawState& drawState = this->getDrawState(); 843 844 // Check if per-vertex or constant color may have partial alpha 845 if ((layout & kColor_VertexLayoutBit) || 846 0xff != GrColorUnpackA(drawState.getColor())) { 847 return false; 848 } 849 // Check if color filter could introduce an alpha 850 // (TODO: Consider being more aggressive with regards to detecting 0xff 851 // final alpha from color filter). 852 if (SkXfermode::kDst_Mode != drawState.getColorFilterMode()) { 853 return false; 854 } 855 // Check if a color stage could create a partial alpha 856 for (int s = 0; s < drawState.getFirstCoverageStage(); ++s) { 857 if (StageWillBeUsed(s, layout, fCurrDrawState)) { 858 GrAssert(NULL != drawState.getTexture(s)); 859 GrPixelConfig config = drawState.getTexture(s)->config(); 860 if (!GrPixelConfigIsOpaque(config)) { 861 return false; 862 } 863 } 864 } 865 return true; 866} 867 868GrDrawTarget::BlendOptFlags 869GrDrawTarget::getBlendOpts(bool forceCoverage, 870 GrBlendCoeff* srcCoeff, 871 GrBlendCoeff* dstCoeff) const { 872 873 const GrVertexLayout& layout = this->getGeomSrc().fVertexLayout; 874 const GrDrawState& drawState = this->getDrawState(); 875 876 GrBlendCoeff bogusSrcCoeff, bogusDstCoeff; 877 if (NULL == srcCoeff) { 878 srcCoeff = &bogusSrcCoeff; 879 } 880 *srcCoeff = drawState.getSrcBlendCoeff(); 881 882 if (NULL == dstCoeff) { 883 dstCoeff = &bogusDstCoeff; 884 } 885 *dstCoeff = drawState.getDstBlendCoeff(); 886 887 // We don't ever expect source coeffecients to reference the source 888 GrAssert(kSA_BlendCoeff != *srcCoeff && 889 kISA_BlendCoeff != *srcCoeff && 890 kSC_BlendCoeff != *srcCoeff && 891 kISC_BlendCoeff != *srcCoeff); 892 // same for dst 893 GrAssert(kDA_BlendCoeff != *dstCoeff && 894 kIDA_BlendCoeff != *dstCoeff && 895 kDC_BlendCoeff != *dstCoeff && 896 kIDC_BlendCoeff != *dstCoeff); 897 898 if (drawState.isColorWriteDisabled()) { 899 *srcCoeff = kZero_BlendCoeff; 900 *dstCoeff = kOne_BlendCoeff; 901 } 902 903 bool srcAIsOne = this->srcAlphaWillBeOne(); 904 bool dstCoeffIsOne = kOne_BlendCoeff == *dstCoeff || 905 (kSA_BlendCoeff == *dstCoeff && srcAIsOne); 906 bool dstCoeffIsZero = kZero_BlendCoeff == *dstCoeff || 907 (kISA_BlendCoeff == *dstCoeff && srcAIsOne); 908 909 910 // When coeffs are (0,1) there is no reason to draw at all, unless 911 // stenciling is enabled. Having color writes disabled is effectively 912 // (0,1). The same applies when coverage is known to be 0. 913 if ((kZero_BlendCoeff == *srcCoeff && dstCoeffIsOne) || 914 (!(layout & kCoverage_VertexLayoutBit) && 915 0 == drawState.getCoverage())) { 916 if (drawState.getStencil().doesWrite()) { 917 return kDisableBlend_BlendOptFlag | 918 kEmitTransBlack_BlendOptFlag; 919 } else { 920 return kSkipDraw_BlendOptFlag; 921 } 922 } 923 924 // check for coverage due to constant coverage, per-vertex coverage, 925 // edge aa or coverage texture stage 926 bool hasCoverage = forceCoverage || 927 0xffffffff != drawState.getCoverage() || 928 drawState.getNumAAEdges() > 0 || 929 (layout & kCoverage_VertexLayoutBit) || 930 (layout & kEdge_VertexLayoutBit); 931 for (int s = drawState.getFirstCoverageStage(); 932 !hasCoverage && s < GrDrawState::kNumStages; 933 ++s) { 934 if (StageWillBeUsed(s, layout, fCurrDrawState)) { 935 hasCoverage = true; 936 } 937 } 938 939 // if we don't have coverage we can check whether the dst 940 // has to read at all. If not, we'll disable blending. 941 if (!hasCoverage) { 942 if (dstCoeffIsZero) { 943 if (kOne_BlendCoeff == *srcCoeff) { 944 // if there is no coverage and coeffs are (1,0) then we 945 // won't need to read the dst at all, it gets replaced by src 946 return kDisableBlend_BlendOptFlag; 947 } else if (kZero_BlendCoeff == *srcCoeff) { 948 // if the op is "clear" then we don't need to emit a color 949 // or blend, just write transparent black into the dst. 950 *srcCoeff = kOne_BlendCoeff; 951 *dstCoeff = kZero_BlendCoeff; 952 return kDisableBlend_BlendOptFlag | 953 kEmitTransBlack_BlendOptFlag; 954 } 955 } 956 } else { 957 // check whether coverage can be safely rolled into alpha 958 // of if we can skip color computation and just emit coverage 959 if (this->canTweakAlphaForCoverage()) { 960 return kCoverageAsAlpha_BlendOptFlag; 961 } 962 if (dstCoeffIsZero) { 963 if (kZero_BlendCoeff == *srcCoeff) { 964 // the source color is not included in the blend 965 // the dst coeff is effectively zero so blend works out to: 966 // (c)(0)D + (1-c)D = (1-c)D. 967 *dstCoeff = kISA_BlendCoeff; 968 return kEmitCoverage_BlendOptFlag; 969 } else if (srcAIsOne) { 970 // the dst coeff is effectively zero so blend works out to: 971 // cS + (c)(0)D + (1-c)D = cS + (1-c)D. 972 // If Sa is 1 then we can replace Sa with c 973 // and set dst coeff to 1-Sa. 974 *dstCoeff = kISA_BlendCoeff; 975 return kCoverageAsAlpha_BlendOptFlag; 976 } 977 } else if (dstCoeffIsOne) { 978 // the dst coeff is effectively one so blend works out to: 979 // cS + (c)(1)D + (1-c)D = cS + D. 980 *dstCoeff = kOne_BlendCoeff; 981 return kCoverageAsAlpha_BlendOptFlag; 982 } 983 } 984 return kNone_BlendOpt; 985} 986 987bool GrDrawTarget::willUseHWAALines() const { 988 // there is a conflict between using smooth lines and our use of 989 // premultiplied alpha. Smooth lines tweak the incoming alpha value 990 // but not in a premul-alpha way. So we only use them when our alpha 991 // is 0xff and tweaking the color for partial coverage is OK 992 if (!fCaps.fHWAALineSupport || 993 !this->getDrawState().isHWAntialiasState()) { 994 return false; 995 } 996 BlendOptFlags opts = this->getBlendOpts(); 997 return (kDisableBlend_BlendOptFlag & opts) && 998 (kCoverageAsAlpha_BlendOptFlag & opts); 999} 1000 1001bool GrDrawTarget::canApplyCoverage() const { 1002 // we can correctly apply coverage if a) we have dual source blending 1003 // or b) one of our blend optimizations applies. 1004 return this->getCaps().fDualSourceBlendingSupport || 1005 kNone_BlendOpt != this->getBlendOpts(true); 1006} 1007 1008bool GrDrawTarget::drawWillReadDst() const { 1009 return SkToBool((kDisableBlend_BlendOptFlag | kSkipDraw_BlendOptFlag) & 1010 this->getBlendOpts()); 1011} 1012 1013 1014//////////////////////////////////////////////////////////////////////////////// 1015 1016void GrDrawTarget::drawRect(const GrRect& rect, 1017 const GrMatrix* matrix, 1018 StageMask stageMask, 1019 const GrRect* srcRects[], 1020 const GrMatrix* srcMatrices[]) { 1021 GrVertexLayout layout = GetRectVertexLayout(stageMask, srcRects); 1022 1023 AutoReleaseGeometry geo(this, layout, 4, 0); 1024 if (!geo.succeeded()) { 1025 GrPrintf("Failed to get space for vertices!\n"); 1026 return; 1027 } 1028 1029 SetRectVertices(rect, matrix, srcRects, 1030 srcMatrices, layout, geo.vertices()); 1031 1032 drawNonIndexed(kTriangleFan_PrimitiveType, 0, 4); 1033} 1034 1035GrVertexLayout GrDrawTarget::GetRectVertexLayout(StageMask stageMask, 1036 const GrRect* srcRects[]) { 1037 GrVertexLayout layout = 0; 1038 1039 for (int i = 0; i < GrDrawState::kNumStages; ++i) { 1040 int numTC = 0; 1041 if (stageMask & (1 << i)) { 1042 if (NULL != srcRects && NULL != srcRects[i]) { 1043 layout |= StageTexCoordVertexLayoutBit(i, numTC); 1044 ++numTC; 1045 } else { 1046 layout |= StagePosAsTexCoordVertexLayoutBit(i); 1047 } 1048 } 1049 } 1050 return layout; 1051} 1052 1053void GrDrawTarget::clipWillBeSet(const GrClip& clip) { 1054} 1055 1056void GrDrawTarget::SetRectVertices(const GrRect& rect, 1057 const GrMatrix* matrix, 1058 const GrRect* srcRects[], 1059 const GrMatrix* srcMatrices[], 1060 GrVertexLayout layout, 1061 void* vertices) { 1062#if GR_DEBUG 1063 // check that the layout and srcRects agree 1064 for (int i = 0; i < GrDrawState::kNumStages; ++i) { 1065 if (VertexTexCoordsForStage(i, layout) >= 0) { 1066 GR_DEBUGASSERT(NULL != srcRects && NULL != srcRects[i]); 1067 } else { 1068 GR_DEBUGASSERT(NULL == srcRects || NULL == srcRects[i]); 1069 } 1070 } 1071#endif 1072 1073 int stageOffsets[GrDrawState::kNumStages]; 1074 int vsize = VertexSizeAndOffsetsByStage(layout, stageOffsets, 1075 NULL, NULL, NULL); 1076 1077 GrTCast<GrPoint*>(vertices)->setRectFan(rect.fLeft, rect.fTop, 1078 rect.fRight, rect.fBottom, 1079 vsize); 1080 if (NULL != matrix) { 1081 matrix->mapPointsWithStride(GrTCast<GrPoint*>(vertices), vsize, 4); 1082 } 1083 1084 for (int i = 0; i < GrDrawState::kNumStages; ++i) { 1085 if (stageOffsets[i] > 0) { 1086 GrPoint* coords = GrTCast<GrPoint*>(GrTCast<intptr_t>(vertices) + 1087 stageOffsets[i]); 1088 coords->setRectFan(srcRects[i]->fLeft, srcRects[i]->fTop, 1089 srcRects[i]->fRight, srcRects[i]->fBottom, 1090 vsize); 1091 if (NULL != srcMatrices && NULL != srcMatrices[i]) { 1092 srcMatrices[i]->mapPointsWithStride(coords, vsize, 4); 1093 } 1094 } 1095 } 1096} 1097 1098//////////////////////////////////////////////////////////////////////////////// 1099 1100GrDrawTarget::AutoStateRestore::AutoStateRestore() { 1101 fDrawTarget = NULL; 1102} 1103 1104GrDrawTarget::AutoStateRestore::AutoStateRestore(GrDrawTarget* target) { 1105 fDrawTarget = target; 1106 if (NULL != fDrawTarget) { 1107 fDrawTarget->saveCurrentDrawState(&fDrawState); 1108 } 1109} 1110 1111GrDrawTarget::AutoStateRestore::~AutoStateRestore() { 1112 if (NULL != fDrawTarget) { 1113 fDrawTarget->restoreDrawState(fDrawState); 1114 } 1115} 1116 1117void GrDrawTarget::AutoStateRestore::set(GrDrawTarget* target) { 1118 if (target != fDrawTarget) { 1119 if (NULL != fDrawTarget) { 1120 fDrawTarget->restoreDrawState(fDrawState); 1121 } 1122 if (NULL != target) { 1123 target->saveCurrentDrawState(&fDrawState); 1124 } 1125 fDrawTarget = target; 1126 } 1127} 1128 1129//////////////////////////////////////////////////////////////////////////////// 1130 1131GrDrawTarget::AutoDeviceCoordDraw::AutoDeviceCoordDraw( 1132 GrDrawTarget* target, 1133 GrDrawState::StageMask stageMask) { 1134 GrAssert(NULL != target); 1135 GrDrawState* drawState = target->drawState(); 1136 1137 fDrawTarget = target; 1138 fViewMatrix = drawState->getViewMatrix(); 1139 fStageMask = stageMask; 1140 if (fStageMask) { 1141 GrMatrix invVM; 1142 if (fViewMatrix.invert(&invVM)) { 1143 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 1144 if (fStageMask & (1 << s)) { 1145 fSamplerMatrices[s] = drawState->getSampler(s).getMatrix(); 1146 } 1147 } 1148 drawState->preConcatSamplerMatrices(fStageMask, invVM); 1149 } else { 1150 // sad trombone sound 1151 fStageMask = 0; 1152 } 1153 } 1154 drawState->setViewMatrix(GrMatrix::I()); 1155} 1156 1157GrDrawTarget::AutoDeviceCoordDraw::~AutoDeviceCoordDraw() { 1158 GrDrawState* drawState = fDrawTarget->drawState(); 1159 drawState->setViewMatrix(fViewMatrix); 1160 for (int s = 0; s < GrDrawState::kNumStages; ++s) { 1161 if (fStageMask & (1 << s)) { 1162 *drawState->sampler(s)->matrix() = fSamplerMatrices[s]; 1163 } 1164 } 1165} 1166 1167//////////////////////////////////////////////////////////////////////////////// 1168 1169GrDrawTarget::AutoReleaseGeometry::AutoReleaseGeometry( 1170 GrDrawTarget* target, 1171 GrVertexLayout vertexLayout, 1172 int vertexCount, 1173 int indexCount) { 1174 fTarget = NULL; 1175 this->set(target, vertexLayout, vertexCount, indexCount); 1176} 1177 1178GrDrawTarget::AutoReleaseGeometry::AutoReleaseGeometry() { 1179 fTarget = NULL; 1180} 1181 1182GrDrawTarget::AutoReleaseGeometry::~AutoReleaseGeometry() { 1183 this->reset(); 1184} 1185 1186bool GrDrawTarget::AutoReleaseGeometry::set(GrDrawTarget* target, 1187 GrVertexLayout vertexLayout, 1188 int vertexCount, 1189 int indexCount) { 1190 this->reset(); 1191 fTarget = target; 1192 bool success = true; 1193 if (NULL != fTarget) { 1194 fTarget = target; 1195 success = target->reserveVertexAndIndexSpace(vertexLayout, 1196 vertexCount, 1197 indexCount, 1198 &fVertices, 1199 &fIndices); 1200 if (!success) { 1201 fTarget = NULL; 1202 this->reset(); 1203 } 1204 } 1205 GrAssert(success == (NULL != fTarget)); 1206 return success; 1207} 1208 1209void GrDrawTarget::AutoReleaseGeometry::reset() { 1210 if (NULL != fTarget) { 1211 if (NULL != fVertices) { 1212 fTarget->resetVertexSource(); 1213 } 1214 if (NULL != fIndices) { 1215 fTarget->resetIndexSource(); 1216 } 1217 fTarget = NULL; 1218 } 1219 fVertices = NULL; 1220 fIndices = NULL; 1221} 1222 1223void GrDrawTarget::Caps::print() const { 1224 static const char* gNY[] = {"NO", "YES"}; 1225 GrPrintf("8 Bit Palette Support : %s\n", gNY[f8BitPaletteSupport]); 1226 GrPrintf("NPOT Texture Tile Support : %s\n", gNY[fNPOTTextureTileSupport]); 1227 GrPrintf("Two Sided Stencil Support : %s\n", gNY[fTwoSidedStencilSupport]); 1228 GrPrintf("Stencil Wrap Ops Support : %s\n", gNY[fStencilWrapOpsSupport]); 1229 GrPrintf("HW AA Lines Support : %s\n", gNY[fHWAALineSupport]); 1230 GrPrintf("Shader Derivative Support : %s\n", gNY[fShaderDerivativeSupport]); 1231 GrPrintf("Geometry Shader Support : %s\n", gNY[fGeometryShaderSupport]); 1232 GrPrintf("FSAA Support : %s\n", gNY[fFSAASupport]); 1233 GrPrintf("Dual Source Blending Support: %s\n", gNY[fDualSourceBlendingSupport]); 1234 GrPrintf("Buffer Lock Support : %s\n", gNY[fBufferLockSupport]); 1235 GrPrintf("Max Texture Size : %d\n", fMaxTextureSize); 1236 GrPrintf("Max Render Target Size : %d\n", fMaxRenderTargetSize); 1237} 1238 1239