| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "src/gpu/GrDefaultGeoProcFactory.h" |
| |
| #include "include/core/SkRefCnt.h" |
| #include "src/core/SkArenaAlloc.h" |
| #include "src/gpu/GrCaps.h" |
| #include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h" |
| #include "src/gpu/glsl/GrGLSLGeometryProcessor.h" |
| #include "src/gpu/glsl/GrGLSLUniformHandler.h" |
| #include "src/gpu/glsl/GrGLSLVarying.h" |
| #include "src/gpu/glsl/GrGLSLVertexGeoBuilder.h" |
| |
| /* |
| * The default Geometry Processor simply takes position and multiplies it by the uniform view |
| * matrix. It also leaves coverage untouched. Behind the scenes, we may add per vertex color or |
| * local coords. |
| */ |
| |
| enum GPFlag { |
| kColorAttribute_GPFlag = 0x1, |
| kColorAttributeIsWide_GPFlag = 0x2, |
| kLocalCoordAttribute_GPFlag = 0x4, |
| kCoverageAttribute_GPFlag = 0x8, |
| kCoverageAttributeTweak_GPFlag = 0x10, |
| }; |
| |
| class DefaultGeoProc : public GrGeometryProcessor { |
| public: |
| static GrGeometryProcessor* Make(SkArenaAlloc* arena, |
| uint32_t gpTypeFlags, |
| const SkPMColor4f& color, |
| const SkMatrix& viewMatrix, |
| const SkMatrix& localMatrix, |
| bool localCoordsWillBeRead, |
| uint8_t coverage) { |
| return arena->make([&](void* ptr) { |
| return new (ptr) DefaultGeoProc(gpTypeFlags, color, viewMatrix, localMatrix, coverage, |
| localCoordsWillBeRead); |
| }); |
| } |
| |
| const char* name() const override { return "DefaultGeometryProcessor"; } |
| |
| const SkPMColor4f& color() const { return fColor; } |
| bool hasVertexColor() const { return fInColor.isInitialized(); } |
| const SkMatrix& viewMatrix() const { return fViewMatrix; } |
| const SkMatrix& localMatrix() const { return fLocalMatrix; } |
| bool localCoordsWillBeRead() const { return fLocalCoordsWillBeRead; } |
| uint8_t coverage() const { return fCoverage; } |
| bool hasVertexCoverage() const { return fInCoverage.isInitialized(); } |
| |
| class GLSLProcessor : public GrGLSLGeometryProcessor { |
| public: |
| GLSLProcessor() |
| : fViewMatrixPrev(SkMatrix::InvalidMatrix()) |
| , fLocalMatrixPrev(SkMatrix::InvalidMatrix()) |
| , fColor(SK_PMColor4fILLEGAL) |
| , fCoverage(0xff) {} |
| |
| void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override { |
| const DefaultGeoProc& gp = args.fGeomProc.cast<DefaultGeoProc>(); |
| GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder; |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; |
| GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler; |
| GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; |
| |
| // emit attributes |
| varyingHandler->emitAttributes(gp); |
| |
| bool tweakAlpha = SkToBool(gp.fFlags & kCoverageAttributeTweak_GPFlag); |
| SkASSERT(!tweakAlpha || gp.hasVertexCoverage()); |
| |
| // Setup pass through color |
| fragBuilder->codeAppendf("half4 %s;", args.fOutputColor); |
| if (gp.hasVertexColor() || tweakAlpha) { |
| GrGLSLVarying varying(kHalf4_GrSLType); |
| varyingHandler->addVarying("color", &varying); |
| |
| // Start with the attribute or with uniform color |
| if (gp.hasVertexColor()) { |
| vertBuilder->codeAppendf("half4 color = %s;", gp.fInColor.name()); |
| } else { |
| const char* colorUniformName; |
| fColorUniform = uniformHandler->addUniform(nullptr, |
| kVertex_GrShaderFlag, |
| kHalf4_GrSLType, |
| "Color", |
| &colorUniformName); |
| vertBuilder->codeAppendf("half4 color = %s;", colorUniformName); |
| } |
| |
| // Optionally fold coverage into alpha (color). |
| if (tweakAlpha) { |
| vertBuilder->codeAppendf("color = color * %s;", gp.fInCoverage.name()); |
| } |
| vertBuilder->codeAppendf("%s = color;\n", varying.vsOut()); |
| fragBuilder->codeAppendf("%s = %s;", args.fOutputColor, varying.fsIn()); |
| } else { |
| this->setupUniformColor(fragBuilder, uniformHandler, args.fOutputColor, |
| &fColorUniform); |
| } |
| |
| // Setup position |
| WriteOutputPosition(vertBuilder, |
| uniformHandler, |
| *args.fShaderCaps, |
| gpArgs, |
| gp.fInPosition.name(), |
| gp.viewMatrix(), |
| &fViewMatrixUniform); |
| |
| // emit transforms using either explicit local coords or positions |
| if (gp.fInLocalCoords.isInitialized()) { |
| SkASSERT(gp.localMatrix().isIdentity()); |
| gpArgs->fLocalCoordVar = gp.fInLocalCoords.asShaderVar(); |
| } else if (gp.fLocalCoordsWillBeRead) { |
| WriteLocalCoord(vertBuilder, |
| uniformHandler, |
| *args.fShaderCaps, |
| gpArgs, |
| gp.fInPosition.asShaderVar(), |
| gp.localMatrix(), |
| &fLocalMatrixUniform); |
| } |
| |
| // Setup coverage as pass through |
| if (gp.hasVertexCoverage() && !tweakAlpha) { |
| fragBuilder->codeAppendf("half alpha = 1.0;"); |
| varyingHandler->addPassThroughAttribute(gp.fInCoverage, "alpha"); |
| fragBuilder->codeAppendf("half4 %s = half4(alpha);", args.fOutputCoverage); |
| } else if (gp.coverage() == 0xff) { |
| fragBuilder->codeAppendf("const half4 %s = half4(1);", args.fOutputCoverage); |
| } else { |
| const char* fragCoverage; |
| fCoverageUniform = uniformHandler->addUniform(nullptr, |
| kFragment_GrShaderFlag, |
| kHalf_GrSLType, |
| "Coverage", |
| &fragCoverage); |
| fragBuilder->codeAppendf("half4 %s = half4(%s);", |
| args.fOutputCoverage, fragCoverage); |
| } |
| } |
| |
| static inline void GenKey(const GrGeometryProcessor& gp, |
| const GrShaderCaps& shaderCaps, |
| GrProcessorKeyBuilder* b) { |
| const DefaultGeoProc& def = gp.cast<DefaultGeoProc>(); |
| uint32_t key = def.fFlags; |
| key |= (def.coverage() == 0xff) ? 0x80 : 0; |
| key |= def.localCoordsWillBeRead() ? 0x100 : 0; |
| |
| bool usesLocalMatrix = def.localCoordsWillBeRead() && |
| !def.fInLocalCoords.isInitialized(); |
| key = AddMatrixKeys(shaderCaps, |
| key, |
| def.viewMatrix(), |
| usesLocalMatrix ? def.localMatrix() : SkMatrix::I()); |
| b->add32(key); |
| } |
| |
| void setData(const GrGLSLProgramDataManager& pdman, |
| const GrShaderCaps& shaderCaps, |
| const GrGeometryProcessor& geomProc) override { |
| const DefaultGeoProc& dgp = geomProc.cast<DefaultGeoProc>(); |
| |
| SetTransform(pdman, shaderCaps, fViewMatrixUniform, dgp.viewMatrix(), &fViewMatrixPrev); |
| SetTransform(pdman, |
| shaderCaps, |
| fLocalMatrixUniform, |
| dgp.localMatrix(), |
| &fLocalMatrixPrev); |
| |
| if (!dgp.hasVertexColor() && dgp.color() != fColor) { |
| pdman.set4fv(fColorUniform, 1, dgp.color().vec()); |
| fColor = dgp.color(); |
| } |
| |
| if (dgp.coverage() != fCoverage && !dgp.hasVertexCoverage()) { |
| pdman.set1f(fCoverageUniform, GrNormalizeByteToFloat(dgp.coverage())); |
| fCoverage = dgp.coverage(); |
| } |
| } |
| |
| private: |
| SkMatrix fViewMatrixPrev; |
| SkMatrix fLocalMatrixPrev; |
| SkPMColor4f fColor; |
| uint8_t fCoverage; |
| UniformHandle fViewMatrixUniform; |
| UniformHandle fLocalMatrixUniform; |
| UniformHandle fColorUniform; |
| UniformHandle fCoverageUniform; |
| |
| using INHERITED = GrGLSLGeometryProcessor; |
| }; |
| |
| void getGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const override { |
| GLSLProcessor::GenKey(*this, caps, b); |
| } |
| |
| GrGLSLGeometryProcessor* createGLSLInstance(const GrShaderCaps&) const override { |
| return new GLSLProcessor(); |
| } |
| |
| private: |
| DefaultGeoProc(uint32_t gpTypeFlags, |
| const SkPMColor4f& color, |
| const SkMatrix& viewMatrix, |
| const SkMatrix& localMatrix, |
| uint8_t coverage, |
| bool localCoordsWillBeRead) |
| : INHERITED(kDefaultGeoProc_ClassID) |
| , fColor(color) |
| , fViewMatrix(viewMatrix) |
| , fLocalMatrix(localMatrix) |
| , fCoverage(coverage) |
| , fFlags(gpTypeFlags) |
| , fLocalCoordsWillBeRead(localCoordsWillBeRead) { |
| fInPosition = {"inPosition", kFloat2_GrVertexAttribType, kFloat2_GrSLType}; |
| if (fFlags & kColorAttribute_GPFlag) { |
| fInColor = MakeColorAttribute("inColor", |
| SkToBool(fFlags & kColorAttributeIsWide_GPFlag)); |
| } |
| if (fFlags & kLocalCoordAttribute_GPFlag) { |
| fInLocalCoords = {"inLocalCoord", kFloat2_GrVertexAttribType, |
| kFloat2_GrSLType}; |
| } |
| if (fFlags & kCoverageAttribute_GPFlag) { |
| fInCoverage = {"inCoverage", kFloat_GrVertexAttribType, kHalf_GrSLType}; |
| } |
| this->setVertexAttributes(&fInPosition, 4); |
| } |
| |
| Attribute fInPosition; |
| Attribute fInColor; |
| Attribute fInLocalCoords; |
| Attribute fInCoverage; |
| SkPMColor4f fColor; |
| SkMatrix fViewMatrix; |
| SkMatrix fLocalMatrix; |
| uint8_t fCoverage; |
| uint32_t fFlags; |
| bool fLocalCoordsWillBeRead; |
| |
| GR_DECLARE_GEOMETRY_PROCESSOR_TEST |
| |
| using INHERITED = GrGeometryProcessor; |
| }; |
| |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(DefaultGeoProc); |
| |
| #if GR_TEST_UTILS |
| GrGeometryProcessor* DefaultGeoProc::TestCreate(GrProcessorTestData* d) { |
| uint32_t flags = 0; |
| if (d->fRandom->nextBool()) { |
| flags |= kColorAttribute_GPFlag; |
| } |
| if (d->fRandom->nextBool()) { |
| flags |= kColorAttributeIsWide_GPFlag; |
| } |
| if (d->fRandom->nextBool()) { |
| flags |= kCoverageAttribute_GPFlag; |
| if (d->fRandom->nextBool()) { |
| flags |= kCoverageAttributeTweak_GPFlag; |
| } |
| } |
| if (d->fRandom->nextBool()) { |
| flags |= kLocalCoordAttribute_GPFlag; |
| } |
| |
| GrColor color = GrRandomColor(d->fRandom); |
| SkMatrix viewMtx = GrTest::TestMatrix(d->fRandom); |
| SkMatrix localMtx = GrTest::TestMatrix(d->fRandom); |
| bool readsLocalCoords = d->fRandom->nextBool(); |
| uint8_t coverage = GrRandomCoverage(d->fRandom); |
| return DefaultGeoProc::Make(d->allocator(), |
| flags, |
| SkPMColor4f::FromBytes_RGBA(color), |
| viewMtx, |
| localMtx, |
| readsLocalCoords, |
| coverage); |
| } |
| #endif |
| |
| GrGeometryProcessor* GrDefaultGeoProcFactory::Make(SkArenaAlloc* arena, |
| const Color& color, |
| const Coverage& coverage, |
| const LocalCoords& localCoords, |
| const SkMatrix& viewMatrix) { |
| uint32_t flags = 0; |
| if (Color::kPremulGrColorAttribute_Type == color.fType) { |
| flags |= kColorAttribute_GPFlag; |
| } else if (Color::kPremulWideColorAttribute_Type == color.fType) { |
| flags |= kColorAttribute_GPFlag | kColorAttributeIsWide_GPFlag; |
| } |
| if (Coverage::kAttribute_Type == coverage.fType) { |
| flags |= kCoverageAttribute_GPFlag; |
| } else if (Coverage::kAttributeTweakAlpha_Type == coverage.fType) { |
| flags |= kCoverageAttribute_GPFlag | kCoverageAttributeTweak_GPFlag; |
| } |
| flags |= localCoords.fType == LocalCoords::kHasExplicit_Type ? kLocalCoordAttribute_GPFlag : 0; |
| |
| uint8_t inCoverage = coverage.fCoverage; |
| bool localCoordsWillBeRead = localCoords.fType != LocalCoords::kUnused_Type; |
| |
| return DefaultGeoProc::Make(arena, |
| flags, |
| color.fColor, |
| viewMatrix, |
| localCoords.fMatrix ? *localCoords.fMatrix : SkMatrix::I(), |
| localCoordsWillBeRead, |
| inCoverage); |
| } |
| |
| GrGeometryProcessor* GrDefaultGeoProcFactory::MakeForDeviceSpace(SkArenaAlloc* arena, |
| const Color& color, |
| const Coverage& coverage, |
| const LocalCoords& localCoords, |
| const SkMatrix& viewMatrix) { |
| SkMatrix invert = SkMatrix::I(); |
| if (LocalCoords::kUnused_Type != localCoords.fType) { |
| SkASSERT(LocalCoords::kUsePosition_Type == localCoords.fType); |
| if (!viewMatrix.isIdentity() && !viewMatrix.invert(&invert)) { |
| return nullptr; |
| } |
| |
| if (localCoords.hasLocalMatrix()) { |
| invert.postConcat(*localCoords.fMatrix); |
| } |
| } |
| |
| LocalCoords inverted(LocalCoords::kUsePosition_Type, &invert); |
| return Make(arena, color, coverage, inverted, SkMatrix::I()); |
| } |