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| 1 /* |
| 2 * Copyright 2016 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #include "GrMSAAPathRenderer.h" |
| 9 |
| 10 #include "GrBatchFlushState.h" |
| 11 #include "GrDefaultGeoProcFactory.h" |
| 12 #include "GrPathStencilSettings.h" |
| 13 #include "GrPathUtils.h" |
| 14 #include "GrPipelineBuilder.h" |
| 15 #include "GrMesh.h" |
| 16 #include "SkGeometry.h" |
| 17 #include "SkTraceEvent.h" |
| 18 #include "glsl/GrGLSLGeometryProcessor.h" |
| 19 #include "glsl/GrGLSLFragmentShaderBuilder.h" |
| 20 #include "glsl/GrGLSLVertexShaderBuilder.h" |
| 21 #include "glsl/GrGLSLProgramDataManager.h" |
| 22 #include "glsl/GrGLSLUtil.h" |
| 23 #include "gl/GrGLVaryingHandler.h" |
| 24 #include "batches/GrRectBatchFactory.h" |
| 25 #include "batches/GrVertexBatch.h" |
| 26 |
| 27 static const float kTolerance = 0.5f; |
| 28 |
| 29 //////////////////////////////////////////////////////////////////////////////// |
| 30 // Helpers for drawPath |
| 31 |
| 32 static inline bool single_pass_path(const SkPath& path, const SkStrokeRec& strok
e) { |
| 33 if (!path.isInverseFillType()) { |
| 34 return path.isConvex(); |
| 35 } |
| 36 return false; |
| 37 } |
| 38 |
| 39 GrPathRenderer::StencilSupport |
| 40 GrMSAAPathRenderer::onGetStencilSupport(const SkPath& path, const GrStrokeInfo&
stroke) const { |
| 41 if (single_pass_path(path, stroke)) { |
| 42 return GrPathRenderer::kNoRestriction_StencilSupport; |
| 43 } else { |
| 44 return GrPathRenderer::kStencilOnly_StencilSupport; |
| 45 } |
| 46 } |
| 47 |
| 48 struct MSAALineVertices { |
| 49 struct Vertex { |
| 50 SkPoint fPosition; |
| 51 SkColor fColor; |
| 52 }; |
| 53 Vertex* vertices; |
| 54 Vertex* nextVertex; |
| 55 #ifdef SK_DEBUG |
| 56 Vertex* verticesEnd; |
| 57 #endif |
| 58 uint16_t* indices; |
| 59 uint16_t* nextIndex; |
| 60 }; |
| 61 |
| 62 struct MSAAQuadVertices { |
| 63 struct Vertex { |
| 64 SkPoint fPosition; |
| 65 SkPoint fUV; |
| 66 SkColor fColor; |
| 67 }; |
| 68 Vertex* vertices; |
| 69 Vertex* nextVertex; |
| 70 #ifdef SK_DEBUG |
| 71 Vertex* verticesEnd; |
| 72 #endif |
| 73 uint16_t* indices; |
| 74 uint16_t* nextIndex; |
| 75 }; |
| 76 |
| 77 static inline void append_contour_edge_indices(uint16_t fanCenterIdx, |
| 78 uint16_t edgeV0Idx, |
| 79 MSAALineVertices& lines) { |
| 80 *(lines.nextIndex++) = fanCenterIdx; |
| 81 *(lines.nextIndex++) = edgeV0Idx; |
| 82 *(lines.nextIndex++) = edgeV0Idx + 1; |
| 83 } |
| 84 |
| 85 static inline void add_quad(MSAALineVertices& lines, MSAAQuadVertices& quads, co
nst SkPoint pts[], |
| 86 SkColor color, bool indexed, uint16_t subpathLineIdx
Start) { |
| 87 SkASSERT(lines.nextVertex < lines.verticesEnd); |
| 88 *lines.nextVertex = { pts[2], color }; |
| 89 if (indexed) { |
| 90 int prevIdx = (uint16_t) (lines.nextVertex - lines.vertices - 1); |
| 91 if (prevIdx > subpathLineIdxStart) { |
| 92 append_contour_edge_indices(subpathLineIdxStart, prevIdx, lines); |
| 93 } |
| 94 } |
| 95 lines.nextVertex++; |
| 96 |
| 97 SkASSERT(quads.nextVertex + 2 < quads.verticesEnd); |
| 98 // the texture coordinates are drawn from the Loop-Blinn rendering algorithm |
| 99 *(quads.nextVertex++) = { pts[0], SkPoint::Make(0.0, 0.0), color }; |
| 100 *(quads.nextVertex++) = { pts[1], SkPoint::Make(0.5, 0.0), color }; |
| 101 *(quads.nextVertex++) = { pts[2], SkPoint::Make(1.0, 1.0), color }; |
| 102 if (indexed) { |
| 103 uint16_t offset = (uint16_t) (quads.nextVertex - quads.vertices) - 3; |
| 104 *(quads.nextIndex++) = offset++; |
| 105 *(quads.nextIndex++) = offset++; |
| 106 *(quads.nextIndex++) = offset++; |
| 107 } |
| 108 } |
| 109 |
| 110 class MSAAQuadProcessor : public GrGeometryProcessor { |
| 111 public: |
| 112 static GrGeometryProcessor* Create(const SkMatrix& viewMatrix) { |
| 113 return new MSAAQuadProcessor(viewMatrix); |
| 114 } |
| 115 |
| 116 virtual ~MSAAQuadProcessor() {} |
| 117 |
| 118 const char* name() const override { return "MSAAQuadProcessor"; } |
| 119 |
| 120 const Attribute* inPosition() const { return fInPosition; } |
| 121 const Attribute* inUV() const { return fInUV; } |
| 122 const Attribute* inColor() const { return fInColor; } |
| 123 const SkMatrix& viewMatrix() const { return fViewMatrix; } |
| 124 const SkMatrix& localMatrix() const { return SkMatrix::I(); } |
| 125 |
| 126 class GLSLProcessor : public GrGLSLGeometryProcessor { |
| 127 public: |
| 128 GLSLProcessor(const GrGeometryProcessor& qpr) {} |
| 129 |
| 130 void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override { |
| 131 const MSAAQuadProcessor& qp = args.fGP.cast<MSAAQuadProcessor>(); |
| 132 GrGLSLVertexBuilder* vsBuilder = args.fVertBuilder; |
| 133 GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler; |
| 134 GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; |
| 135 |
| 136 // emit attributes |
| 137 varyingHandler->emitAttributes(qp); |
| 138 varyingHandler->addPassThroughAttribute(qp.inColor(), args.fOutputCo
lor); |
| 139 |
| 140 GrGLSLVertToFrag uv(kVec2f_GrSLType); |
| 141 varyingHandler->addVarying("uv", &uv, kHigh_GrSLPrecision); |
| 142 vsBuilder->codeAppendf("%s = %s;", uv.vsOut(), qp.inUV()->fName); |
| 143 |
| 144 // Setup position |
| 145 this->setupPosition(vsBuilder, uniformHandler, gpArgs, qp.inPosition
()->fName, |
| 146 qp.viewMatrix(), &fViewMatrixUniform); |
| 147 |
| 148 // emit transforms |
| 149 this->emitTransforms(vsBuilder, varyingHandler, uniformHandler, gpAr
gs->fPositionVar, |
| 150 qp.inPosition()->fName, SkMatrix::I(), args.fTr
ansformsIn, |
| 151 args.fTransformsOut); |
| 152 |
| 153 GrGLSLPPFragmentBuilder* fsBuilder = args.fFragBuilder; |
| 154 fsBuilder->codeAppendf("if (%s.x * %s.x >= %s.y) discard;", uv.fsIn(
), uv.fsIn(), |
| 155 uv.fsIn(
)); |
| 156 fsBuilder->codeAppendf("%s = vec4(1.0);", args.fOutputCoverage); |
| 157 } |
| 158 |
| 159 static inline void GenKey(const GrGeometryProcessor& gp, |
| 160 const GrGLSLCaps&, |
| 161 GrProcessorKeyBuilder* b) { |
| 162 const MSAAQuadProcessor& qp = gp.cast<MSAAQuadProcessor>(); |
| 163 uint32_t key = 0; |
| 164 key |= qp.viewMatrix().hasPerspective() ? 0x1 : 0x0; |
| 165 key |= qp.viewMatrix().isIdentity() ? 0x2: 0x0; |
| 166 b->add32(key); |
| 167 } |
| 168 |
| 169 virtual void setData(const GrGLSLProgramDataManager& pdman, |
| 170 const GrPrimitiveProcessor& gp) override { |
| 171 const MSAAQuadProcessor& qp = gp.cast<MSAAQuadProcessor>(); |
| 172 if (!qp.viewMatrix().isIdentity()) { |
| 173 float viewMatrix[3 * 3]; |
| 174 GrGLSLGetMatrix<3>(viewMatrix, qp.viewMatrix()); |
| 175 pdman.setMatrix3f(fViewMatrixUniform, viewMatrix); |
| 176 } |
| 177 } |
| 178 |
| 179 void setTransformData(const GrPrimitiveProcessor& primProc, |
| 180 const GrGLSLProgramDataManager& pdman, |
| 181 int index, |
| 182 const SkTArray<const GrCoordTransform*, true>& tra
nsforms) override { |
| 183 this->setTransformDataHelper<MSAAQuadProcessor>(primProc, pdman, ind
ex, transforms); |
| 184 } |
| 185 |
| 186 private: |
| 187 typedef GrGLSLGeometryProcessor INHERITED; |
| 188 |
| 189 UniformHandle fViewMatrixUniform; |
| 190 }; |
| 191 |
| 192 virtual void getGLSLProcessorKey(const GrGLSLCaps& caps, |
| 193 GrProcessorKeyBuilder* b) const override { |
| 194 GLSLProcessor::GenKey(*this, caps, b); |
| 195 } |
| 196 |
| 197 virtual GrGLSLPrimitiveProcessor* createGLSLInstance(const GrGLSLCaps&) cons
t override { |
| 198 return new GLSLProcessor(*this); |
| 199 } |
| 200 |
| 201 private: |
| 202 MSAAQuadProcessor(const SkMatrix& viewMatrix) |
| 203 : fViewMatrix(viewMatrix) { |
| 204 this->initClassID<MSAAQuadProcessor>(); |
| 205 fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVe
rtexAttribType, |
| 206 kHigh_GrSLPrecision)); |
| 207 fInUV = &this->addVertexAttrib(Attribute("inUV", kVec2f_GrVertexAttribTy
pe, |
| 208 kHigh_GrSLPrecision)); |
| 209 fInColor = &this->addVertexAttrib(Attribute("inColor", kVec4ub_GrVertexA
ttribType)); |
| 210 this->setSampleShading(1.0f); |
| 211 } |
| 212 |
| 213 const Attribute* fInPosition; |
| 214 const Attribute* fInUV; |
| 215 const Attribute* fInColor; |
| 216 SkMatrix fViewMatrix; |
| 217 |
| 218 GR_DECLARE_GEOMETRY_PROCESSOR_TEST; |
| 219 |
| 220 typedef GrGeometryProcessor INHERITED; |
| 221 }; |
| 222 |
| 223 class MSAAPathBatch : public GrVertexBatch { |
| 224 public: |
| 225 DEFINE_BATCH_CLASS_ID |
| 226 |
| 227 struct Geometry { |
| 228 GrColor fColor; |
| 229 SkPath fPath; |
| 230 SkScalar fTolerance; |
| 231 }; |
| 232 |
| 233 static MSAAPathBatch* Create(const Geometry& geometry, const SkMatrix& viewM
atrix, |
| 234 const SkRect& devBounds) { |
| 235 return new MSAAPathBatch(geometry, viewMatrix, devBounds); |
| 236 } |
| 237 |
| 238 const char* name() const override { return "MSAAPathBatch"; } |
| 239 |
| 240 void computePipelineOptimizations(GrInitInvariantOutput* color, |
| 241 GrInitInvariantOutput* coverage, |
| 242 GrBatchToXPOverrides* overrides) const ove
rride { |
| 243 // When this is called on a batch, there is only one geometry bundle |
| 244 color->setKnownFourComponents(fGeoData[0].fColor); |
| 245 coverage->setKnownSingleComponent(0xff); |
| 246 } |
| 247 |
| 248 bool isValid() const { |
| 249 return !fIsIndexed || fMaxLineIndices <= SK_MaxU16; |
| 250 } |
| 251 |
| 252 private: |
| 253 void initBatchTracker(const GrXPOverridesForBatch& overrides) override { |
| 254 // Handle any color overrides |
| 255 if (!overrides.readsColor()) { |
| 256 fGeoData[0].fColor = GrColor_ILLEGAL; |
| 257 } |
| 258 overrides.getOverrideColorIfSet(&fGeoData[0].fColor); |
| 259 } |
| 260 |
| 261 void computeWorstCasePointCount(const SkPath& path, int* subpaths, SkScalar
tol, |
| 262 int* outLinePointCount, int* outQuadPointCou
nt) const { |
| 263 int linePointCount = 0; |
| 264 int quadPointCount = 0; |
| 265 *subpaths = 1; |
| 266 |
| 267 bool first = true; |
| 268 |
| 269 SkPath::Iter iter(path, false); |
| 270 SkPath::Verb verb; |
| 271 |
| 272 SkPoint pts[4]; |
| 273 while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| 274 switch (verb) { |
| 275 case SkPath::kLine_Verb: |
| 276 linePointCount += 1; |
| 277 break; |
| 278 case SkPath::kConic_Verb: { |
| 279 SkScalar weight = iter.conicWeight(); |
| 280 SkAutoConicToQuads converter; |
| 281 converter.computeQuads(pts, weight, kTolerance); |
| 282 int quadPts = converter.countQuads(); |
| 283 linePointCount += quadPts; |
| 284 quadPointCount += 3 * quadPts; |
| 285 } |
| 286 case SkPath::kQuad_Verb: |
| 287 linePointCount += 1; |
| 288 quadPointCount += 3; |
| 289 break; |
| 290 case SkPath::kCubic_Verb: { |
| 291 SkSTArray<15, SkPoint, true> quadPts; |
| 292 GrPathUtils::convertCubicToQuads(pts, kTolerance, &quadPts); |
| 293 int count = quadPts.count(); |
| 294 linePointCount += count / 3; |
| 295 quadPointCount += count; |
| 296 break; |
| 297 } |
| 298 case SkPath::kMove_Verb: |
| 299 linePointCount += 1; |
| 300 if (!first) { |
| 301 ++(*subpaths); |
| 302 } |
| 303 break; |
| 304 default: |
| 305 break; |
| 306 } |
| 307 first = false; |
| 308 } |
| 309 *outLinePointCount = linePointCount; |
| 310 *outQuadPointCount = quadPointCount; |
| 311 } |
| 312 |
| 313 void onPrepareDraws(Target* target) const override { |
| 314 SkASSERT(this->isValid()); |
| 315 if (fMaxLineVertices == 0) { |
| 316 SkASSERT(fMaxQuadVertices == 0); |
| 317 return; |
| 318 } |
| 319 |
| 320 GrPrimitiveType primitiveType = fIsIndexed ? kTriangles_GrPrimitiveType |
| 321 : kTriangleFan_GrPrimitiveTyp
e; |
| 322 |
| 323 // allocate vertex / index buffers |
| 324 const GrBuffer* lineVertexBuffer; |
| 325 int firstLineVertex; |
| 326 MSAALineVertices lines; |
| 327 size_t lineVertexStride = sizeof(MSAALineVertices::Vertex); |
| 328 lines.vertices = (MSAALineVertices::Vertex*) target->makeVertexSpace(lin
eVertexStride, |
| 329 fMa
xLineVertices, |
| 330 &li
neVertexBuffer, |
| 331 &fi
rstLineVertex); |
| 332 if (!lines.vertices) { |
| 333 SkDebugf("Could not allocate vertices\n"); |
| 334 return; |
| 335 } |
| 336 lines.nextVertex = lines.vertices; |
| 337 SkDEBUGCODE(lines.verticesEnd = lines.vertices + fMaxLineVertices;) |
| 338 |
| 339 MSAAQuadVertices quads; |
| 340 size_t quadVertexStride = sizeof(MSAAQuadVertices::Vertex); |
| 341 SkAutoFree quadVertexPtr(sk_malloc_throw(fMaxQuadVertices * quadVertexSt
ride)); |
| 342 quads.vertices = (MSAAQuadVertices::Vertex*) quadVertexPtr.get(); |
| 343 quads.nextVertex = quads.vertices; |
| 344 SkDEBUGCODE(quads.verticesEnd = quads.vertices + fMaxQuadVertices;) |
| 345 |
| 346 const GrBuffer* lineIndexBuffer = nullptr; |
| 347 int firstLineIndex; |
| 348 if (fIsIndexed) { |
| 349 lines.indices = target->makeIndexSpace(fMaxLineIndices, &lineIndexBu
ffer, |
| 350 &firstLineIndex); |
| 351 if (!lines.indices) { |
| 352 SkDebugf("Could not allocate indices\n"); |
| 353 return; |
| 354 } |
| 355 lines.nextIndex = lines.indices; |
| 356 } else { |
| 357 lines.indices = nullptr; |
| 358 lines.nextIndex = nullptr; |
| 359 } |
| 360 |
| 361 SkAutoFree quadIndexPtr; |
| 362 if (fIsIndexed) { |
| 363 quads.indices = (uint16_t*) sk_malloc_throw(fMaxQuadIndices * sizeof
(uint16_t)); |
| 364 quadIndexPtr.set(quads.indices); |
| 365 quads.nextIndex = quads.indices; |
| 366 } else { |
| 367 quads.indices = nullptr; |
| 368 quads.nextIndex = nullptr; |
| 369 } |
| 370 |
| 371 // fill buffers |
| 372 for (int i = 0; i < fGeoData.count(); i++) { |
| 373 const Geometry& args = fGeoData[i]; |
| 374 |
| 375 if (!this->createGeom(lines, |
| 376 quads, |
| 377 args.fPath, |
| 378 args.fTolerance, |
| 379 fViewMatrix, |
| 380 args.fColor, |
| 381 fIsIndexed)) { |
| 382 return; |
| 383 } |
| 384 } |
| 385 int lineVertexOffset = (int) (lines.nextVertex - lines.vertices); |
| 386 int lineIndexOffset = (int) (lines.nextIndex - lines.indices); |
| 387 SkASSERT(lineVertexOffset <= fMaxLineVertices && lineIndexOffset <= fMax
LineIndices); |
| 388 int quadVertexOffset = (int) (quads.nextVertex - quads.vertices); |
| 389 int quadIndexOffset = (int) (quads.nextIndex - quads.indices); |
| 390 SkASSERT(quadVertexOffset <= fMaxQuadVertices && quadIndexOffset <= fMax
QuadIndices); |
| 391 |
| 392 if (lineVertexOffset) { |
| 393 SkAutoTUnref<const GrGeometryProcessor> lineGP; |
| 394 { |
| 395 using namespace GrDefaultGeoProcFactory; |
| 396 lineGP.reset(GrDefaultGeoProcFactory::Create(Color(Color::kAttri
bute_Type), |
| 397 Coverage(255), |
| 398 LocalCoords(LocalCo
ords::kUnused_Type), |
| 399 fViewMatrix)); |
| 400 } |
| 401 SkASSERT(lineVertexStride == lineGP->getVertexStride()); |
| 402 |
| 403 GrMesh lineMeshes; |
| 404 if (fIsIndexed) { |
| 405 lineMeshes.initIndexed(primitiveType, lineVertexBuffer, lineInde
xBuffer, |
| 406 firstLineVertex, firstLineIndex, lineVe
rtexOffset, |
| 407 lineIndexOffset); |
| 408 } else { |
| 409 lineMeshes.init(primitiveType, lineVertexBuffer, firstLineVertex
, |
| 410 lineVertexOffset); |
| 411 } |
| 412 target->draw(lineGP, lineMeshes); |
| 413 } |
| 414 |
| 415 if (quadVertexOffset) { |
| 416 SkAutoTUnref<const GrGeometryProcessor> quadGP(MSAAQuadProcessor::Cr
eate(fViewMatrix)); |
| 417 SkASSERT(quadVertexStride == quadGP->getVertexStride()); |
| 418 |
| 419 const GrBuffer* quadVertexBuffer; |
| 420 int firstQuadVertex; |
| 421 MSAAQuadVertices::Vertex* quadVertices = (MSAAQuadVertices::Vertex*)
|
| 422 target->makeVertexSpace(quadVertexStride, quadVertexOffset,
&quadVertexBuffer, |
| 423 &firstQuadVertex); |
| 424 memcpy(quadVertices, quads.vertices, quadVertexStride * quadVertexOf
fset); |
| 425 GrMesh quadMeshes; |
| 426 if (fIsIndexed) { |
| 427 const GrBuffer* quadIndexBuffer; |
| 428 int firstQuadIndex; |
| 429 uint16_t* quadIndices = (uint16_t*) target->makeIndexSpace(quadI
ndexOffset, |
| 430 &quad
IndexBuffer, |
| 431 &firs
tQuadIndex); |
| 432 memcpy(quadIndices, quads.indices, sizeof(uint16_t) * quadIndexO
ffset); |
| 433 quadMeshes.initIndexed(kTriangles_GrPrimitiveType, quadVertexBuf
fer, |
| 434 quadIndexBuffer, firstQuadVertex, firstQu
adIndex, |
| 435 quadVertexOffset, quadIndexOffset); |
| 436 } else { |
| 437 quadMeshes.init(kTriangles_GrPrimitiveType, quadVertexBuffer, fi
rstQuadVertex, |
| 438 quadVertexOffset); |
| 439 } |
| 440 target->draw(quadGP, quadMeshes); |
| 441 } |
| 442 } |
| 443 |
| 444 SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; } |
| 445 |
| 446 MSAAPathBatch(const Geometry& geometry, const SkMatrix& viewMatrix, const Sk
Rect& devBounds) |
| 447 : INHERITED(ClassID()) |
| 448 , fViewMatrix(viewMatrix) { |
| 449 fGeoData.push_back(geometry); |
| 450 this->setBounds(devBounds); |
| 451 int contourCount; |
| 452 this->computeWorstCasePointCount(geometry.fPath, &contourCount, kToleran
ce, |
| 453 &fMaxLineVertices, &fMaxQuadVertices); |
| 454 fMaxLineIndices = fMaxLineVertices * 3; |
| 455 fMaxQuadIndices = fMaxQuadVertices * 3; |
| 456 fIsIndexed = contourCount > 1; |
| 457 } |
| 458 |
| 459 bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override { |
| 460 MSAAPathBatch* that = t->cast<MSAAPathBatch>(); |
| 461 if (!GrPipeline::CanCombine(*this->pipeline(), this->bounds(), *that->pi
peline(), |
| 462 that->bounds(), caps)) { |
| 463 return false; |
| 464 } |
| 465 |
| 466 if (!fViewMatrix.cheapEqualTo(that->fViewMatrix)) { |
| 467 return false; |
| 468 } |
| 469 |
| 470 if ((fMaxLineIndices + that->fMaxLineIndices > SK_MaxU16) || |
| 471 (fMaxQuadIndices + that->fMaxQuadIndices > SK_MaxU16)) { |
| 472 return false; |
| 473 } |
| 474 |
| 475 fGeoData.push_back_n(that->geoData()->count(), that->geoData()->begin())
; |
| 476 this->joinBounds(that->bounds()); |
| 477 fIsIndexed = true; |
| 478 fMaxLineVertices += that->fMaxLineVertices; |
| 479 fMaxQuadVertices += that->fMaxQuadVertices; |
| 480 fMaxLineIndices += that->fMaxLineIndices; |
| 481 fMaxQuadIndices += that->fMaxQuadIndices; |
| 482 return true; |
| 483 } |
| 484 |
| 485 bool createGeom(MSAALineVertices& lines, |
| 486 MSAAQuadVertices& quads, |
| 487 const SkPath& path, |
| 488 SkScalar srcSpaceTol, |
| 489 const SkMatrix& m, |
| 490 SkColor color, |
| 491 bool isIndexed) const { |
| 492 { |
| 493 uint16_t subpathIdxStart = (uint16_t) (lines.nextVertex - lines.vert
ices); |
| 494 |
| 495 SkPoint pts[4]; |
| 496 |
| 497 bool first = true; |
| 498 SkPath::Iter iter(path, false); |
| 499 |
| 500 bool done = false; |
| 501 while (!done) { |
| 502 SkPath::Verb verb = iter.next(pts); |
| 503 switch (verb) { |
| 504 case SkPath::kMove_Verb: |
| 505 if (!first) { |
| 506 uint16_t currIdx = (uint16_t) (lines.nextVertex - li
nes.vertices); |
| 507 subpathIdxStart = currIdx; |
| 508 } |
| 509 SkASSERT(lines.nextVertex < lines.verticesEnd); |
| 510 *(lines.nextVertex++) = { pts[0], color }; |
| 511 break; |
| 512 case SkPath::kLine_Verb: |
| 513 if (isIndexed) { |
| 514 uint16_t prevIdx = (uint16_t) (lines.nextVertex - li
nes.vertices - 1); |
| 515 if (prevIdx > subpathIdxStart) { |
| 516 append_contour_edge_indices(subpathIdxStart, pre
vIdx, lines); |
| 517 } |
| 518 } |
| 519 SkASSERT(lines.nextVertex < lines.verticesEnd); |
| 520 *(lines.nextVertex++) = { pts[1], color }; |
| 521 break; |
| 522 case SkPath::kConic_Verb: { |
| 523 SkScalar weight = iter.conicWeight(); |
| 524 SkAutoConicToQuads converter; |
| 525 const SkPoint* quadPts = converter.computeQuads(pts, wei
ght, |
| 526 kToleran
ce); |
| 527 for (int i = 0; i < converter.countQuads(); ++i) { |
| 528 add_quad(lines, quads, quadPts + i * 2, color, isInd
exed, |
| 529 subpathIdxStart); |
| 530 } |
| 531 break; |
| 532 } |
| 533 case SkPath::kQuad_Verb: { |
| 534 add_quad(lines, quads, pts, color, isIndexed, subpathIdx
Start); |
| 535 break; |
| 536 } |
| 537 case SkPath::kCubic_Verb: { |
| 538 SkSTArray<15, SkPoint, true> quadPts; |
| 539 GrPathUtils::convertCubicToQuads(pts, kTolerance, &quadP
ts); |
| 540 int count = quadPts.count(); |
| 541 for (int i = 0; i < count; i += 3) { |
| 542 add_quad(lines, quads, &quadPts[i], color, isIndexed
, subpathIdxStart); |
| 543 } |
| 544 break; |
| 545 } |
| 546 case SkPath::kClose_Verb: |
| 547 break; |
| 548 case SkPath::kDone_Verb: |
| 549 done = true; |
| 550 } |
| 551 first = false; |
| 552 } |
| 553 } |
| 554 return true; |
| 555 } |
| 556 |
| 557 SkSTArray<1, Geometry, true> fGeoData; |
| 558 |
| 559 SkMatrix fViewMatrix; |
| 560 int fMaxLineVertices; |
| 561 int fMaxQuadVertices; |
| 562 int fMaxLineIndices; |
| 563 int fMaxQuadIndices; |
| 564 bool fIsIndexed; |
| 565 |
| 566 typedef GrVertexBatch INHERITED; |
| 567 }; |
| 568 |
| 569 bool GrMSAAPathRenderer::internalDrawPath(GrDrawTarget* target, |
| 570 GrPipelineBuilder* pipelineBuilder, |
| 571 GrColor color, |
| 572 const SkMatrix& viewMatrix, |
| 573 const SkPath& path, |
| 574 const GrStrokeInfo& origStroke, |
| 575 bool stencilOnly) { |
| 576 SkTCopyOnFirstWrite<GrStrokeInfo> stroke(origStroke); |
| 577 |
| 578 const GrXPFactory* xpFactory = pipelineBuilder->getXPFactory(); |
| 579 SkAutoTUnref<const GrXPFactory> backupXPFactory(SkSafeRef(xpFactory)); |
| 580 // face culling doesn't make sense here |
| 581 SkASSERT(GrPipelineBuilder::kBoth_DrawFace == pipelineBuilder->getDrawFace()
); |
| 582 |
| 583 int passCount = 0; |
| 584 const GrStencilSettings* passes[3]; |
| 585 GrPipelineBuilder::DrawFace drawFace[3]; |
| 586 bool reverse = false; |
| 587 bool lastPassIsBounds; |
| 588 |
| 589 if (single_pass_path(path, *stroke)) { |
| 590 passCount = 1; |
| 591 if (stencilOnly) { |
| 592 passes[0] = &gDirectToStencil; |
| 593 } else { |
| 594 passes[0] = nullptr; |
| 595 } |
| 596 drawFace[0] = GrPipelineBuilder::kBoth_DrawFace; |
| 597 lastPassIsBounds = false; |
| 598 } else { |
| 599 switch (path.getFillType()) { |
| 600 case SkPath::kInverseEvenOdd_FillType: |
| 601 reverse = true; |
| 602 // fallthrough |
| 603 case SkPath::kEvenOdd_FillType: |
| 604 passes[0] = &gEOStencilPass; |
| 605 if (stencilOnly) { |
| 606 passCount = 1; |
| 607 lastPassIsBounds = false; |
| 608 } else { |
| 609 passCount = 2; |
| 610 lastPassIsBounds = true; |
| 611 if (reverse) { |
| 612 passes[1] = &gInvEOColorPass; |
| 613 } else { |
| 614 passes[1] = &gEOColorPass; |
| 615 } |
| 616 } |
| 617 drawFace[0] = drawFace[1] = GrPipelineBuilder::kBoth_DrawFace; |
| 618 break; |
| 619 |
| 620 case SkPath::kInverseWinding_FillType: |
| 621 reverse = true; |
| 622 // fallthrough |
| 623 case SkPath::kWinding_FillType: |
| 624 passes[0] = &gWindStencilSeparateWithWrap; |
| 625 passCount = 2; |
| 626 drawFace[0] = GrPipelineBuilder::kBoth_DrawFace; |
| 627 if (stencilOnly) { |
| 628 lastPassIsBounds = false; |
| 629 --passCount; |
| 630 } else { |
| 631 lastPassIsBounds = true; |
| 632 drawFace[passCount-1] = GrPipelineBuilder::kBoth_DrawFace; |
| 633 if (reverse) { |
| 634 passes[passCount-1] = &gInvWindColorPass; |
| 635 } else { |
| 636 passes[passCount-1] = &gWindColorPass; |
| 637 } |
| 638 } |
| 639 break; |
| 640 default: |
| 641 SkDEBUGFAIL("Unknown path fFill!"); |
| 642 return false; |
| 643 } |
| 644 } |
| 645 |
| 646 SkRect devBounds; |
| 647 GetPathDevBounds(path, pipelineBuilder->getRenderTarget(), viewMatrix, &devB
ounds); |
| 648 |
| 649 for (int p = 0; p < passCount; ++p) { |
| 650 pipelineBuilder->setDrawFace(drawFace[p]); |
| 651 if (passes[p]) { |
| 652 *pipelineBuilder->stencil() = *passes[p]; |
| 653 } |
| 654 |
| 655 if (lastPassIsBounds && (p == passCount-1)) { |
| 656 // Reset the XP Factory on pipelineBuilder |
| 657 pipelineBuilder->setXPFactory(backupXPFactory); |
| 658 SkRect bounds; |
| 659 SkMatrix localMatrix = SkMatrix::I(); |
| 660 if (reverse) { |
| 661 SkASSERT(pipelineBuilder->getRenderTarget()); |
| 662 // draw over the dev bounds (which will be the whole dst surface
for inv fill). |
| 663 bounds = devBounds; |
| 664 SkMatrix vmi; |
| 665 // mapRect through persp matrix may not be correct |
| 666 if (!viewMatrix.hasPerspective() && viewMatrix.invert(&vmi)) { |
| 667 vmi.mapRect(&bounds); |
| 668 } else { |
| 669 if (!viewMatrix.invert(&localMatrix)) { |
| 670 return false; |
| 671 } |
| 672 } |
| 673 } else { |
| 674 bounds = path.getBounds(); |
| 675 } |
| 676 const SkMatrix& viewM = (reverse && viewMatrix.hasPerspective()) ? S
kMatrix::I() : |
| 677 v
iewMatrix; |
| 678 SkAutoTUnref<GrDrawBatch> batch( |
| 679 GrRectBatchFactory::CreateNonAAFill(color, viewM, bounds, nu
llptr, |
| 680 &localMatrix)); |
| 681 target->drawBatch(*pipelineBuilder, batch); |
| 682 } else { |
| 683 if (passCount > 1) { |
| 684 pipelineBuilder->setDisableColorXPFactory(); |
| 685 } |
| 686 |
| 687 MSAAPathBatch::Geometry geometry; |
| 688 geometry.fColor = color; |
| 689 geometry.fPath = path; |
| 690 geometry.fTolerance = kTolerance; |
| 691 |
| 692 SkAutoTUnref<MSAAPathBatch> batch(MSAAPathBatch::Create(geometry, vi
ewMatrix, |
| 693 devBounds)); |
| 694 if (batch->isValid()) { |
| 695 target->drawBatch(*pipelineBuilder, batch); |
| 696 } |
| 697 else { |
| 698 return false; |
| 699 } |
| 700 } |
| 701 } |
| 702 return true; |
| 703 } |
| 704 |
| 705 bool GrMSAAPathRenderer::onCanDrawPath(const CanDrawPathArgs& args) const { |
| 706 return !IsStrokeHairlineOrEquivalent(*args.fStroke, *args.fViewMatrix, nullp
tr) && |
| 707 !args.fAntiAlias; |
| 708 } |
| 709 |
| 710 bool GrMSAAPathRenderer::onDrawPath(const DrawPathArgs& args) { |
| 711 GR_AUDIT_TRAIL_AUTO_FRAME(args.fTarget->getAuditTrail(), "GrMSAAPathRenderer
::onDrawPath"); |
| 712 SkPath path; |
| 713 GrStrokeInfo stroke(*args.fStroke); |
| 714 if (stroke.isDashed()) { |
| 715 if (!stroke.applyDashToPath(&path, &stroke, *args.fPath)) { |
| 716 return false; |
| 717 } |
| 718 } else { |
| 719 path = *args.fPath; |
| 720 } |
| 721 if (!stroke.isFillStyle()) { |
| 722 stroke.setResScale(SkScalarAbs(args.fViewMatrix->getMaxScale())); |
| 723 if (!stroke.applyToPath(&path, path)) { |
| 724 return false; |
| 725 } |
| 726 stroke.setFillStyle(); |
| 727 } |
| 728 return this->internalDrawPath(args.fTarget, |
| 729 args.fPipelineBuilder, |
| 730 args.fColor, |
| 731 *args.fViewMatrix, |
| 732 path, |
| 733 stroke, |
| 734 false); |
| 735 } |
| 736 |
| 737 void GrMSAAPathRenderer::onStencilPath(const StencilPathArgs& args) { |
| 738 GR_AUDIT_TRAIL_AUTO_FRAME(args.fTarget->getAuditTrail(),"GrMSAAPathRenderer:
:onStencilPath"); |
| 739 SkASSERT(SkPath::kInverseEvenOdd_FillType != args.fPath->getFillType()); |
| 740 SkASSERT(SkPath::kInverseWinding_FillType != args.fPath->getFillType()); |
| 741 this->internalDrawPath(args.fTarget, args.fPipelineBuilder, GrColor_WHITE, *
args.fViewMatrix, |
| 742 *args.fPath, *args.fStroke, true); |
| 743 } |
| 744 |
| 745 ////////////////////////////////////////////////////////////////////////////////
/////////////////// |
OLD | NEW |