| /* |
| * 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 "GrDefaultGeoProcFactory.h" |
| |
| #include "SkRefCnt.h" |
| #include "glsl/GrGLSLColorSpaceXformHelper.h" |
| #include "glsl/GrGLSLFragmentShaderBuilder.h" |
| #include "glsl/GrGLSLGeometryProcessor.h" |
| #include "glsl/GrGLSLVertexShaderBuilder.h" |
| #include "glsl/GrGLSLVarying.h" |
| #include "glsl/GrGLSLUniformHandler.h" |
| #include "glsl/GrGLSLUtil.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, |
| kColorAttributeIsSkColor_GPFlag = 0x2, |
| kLocalCoordAttribute_GPFlag = 0x4, |
| kCoverageAttribute_GPFlag = 0x8, |
| |
| kLinearizeColorAttribute_GPFlag = 0x10, |
| }; |
| |
| class DefaultGeoProc : public GrGeometryProcessor { |
| public: |
| static sk_sp<GrGeometryProcessor> Make(uint32_t gpTypeFlags, |
| GrColor color, |
| sk_sp<GrColorSpaceXform> colorSpaceXform, |
| const SkMatrix& viewMatrix, |
| const SkMatrix& localMatrix, |
| bool localCoordsWillBeRead, |
| uint8_t coverage) { |
| return sk_sp<GrGeometryProcessor>(new DefaultGeoProc( |
| gpTypeFlags, color, std::move(colorSpaceXform), viewMatrix, localMatrix, coverage, |
| localCoordsWillBeRead)); |
| } |
| |
| const char* name() const override { return "DefaultGeometryProcessor"; } |
| |
| const Attribute* inPosition() const { return fInPosition; } |
| const Attribute* inColor() const { return fInColor; } |
| const Attribute* inLocalCoords() const { return fInLocalCoords; } |
| const Attribute* inCoverage() const { return fInCoverage; } |
| GrColor color() const { return fColor; } |
| bool hasVertexColor() const { return SkToBool(fInColor); } |
| 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 SkToBool(fInCoverage); } |
| bool linearizeColor() const { |
| // Linearization should only happen with SkColor |
| bool linearize = SkToBool(fFlags & kLinearizeColorAttribute_GPFlag); |
| SkASSERT(!linearize || (fFlags & kColorAttributeIsSkColor_GPFlag)); |
| return linearize; |
| } |
| |
| class GLSLProcessor : public GrGLSLGeometryProcessor { |
| public: |
| GLSLProcessor() |
| : fViewMatrix(SkMatrix::InvalidMatrix()), fColor(GrColor_ILLEGAL), fCoverage(0xff) {} |
| |
| void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override { |
| const DefaultGeoProc& gp = args.fGP.cast<DefaultGeoProc>(); |
| GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder; |
| GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder; |
| GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler; |
| GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; |
| |
| // emit attributes |
| varyingHandler->emitAttributes(gp); |
| |
| // Setup pass through color |
| if (gp.hasVertexColor()) { |
| GrGLSLVertToFrag varying(kVec4f_GrSLType); |
| varyingHandler->addVarying("color", &varying); |
| |
| // There are several optional steps to process the color. Start with the attribute: |
| vertBuilder->codeAppendf("vec4 color = %s;", gp.inColor()->fName); |
| |
| // Linearize |
| if (gp.linearizeColor()) { |
| SkString srgbFuncName; |
| static const GrShaderVar gSrgbArgs[] = { |
| GrShaderVar("x", kFloat_GrSLType), |
| }; |
| vertBuilder->emitFunction(kFloat_GrSLType, |
| "srgb_to_linear", |
| SK_ARRAY_COUNT(gSrgbArgs), |
| gSrgbArgs, |
| "return (x <= 0.04045) ? (x / 12.92) " |
| ": pow((x + 0.055) / 1.055, 2.4);", |
| &srgbFuncName); |
| vertBuilder->codeAppendf("color = vec4(%s(%s.r), %s(%s.g), %s(%s.b), %s.a);", |
| srgbFuncName.c_str(), gp.inColor()->fName, |
| srgbFuncName.c_str(), gp.inColor()->fName, |
| srgbFuncName.c_str(), gp.inColor()->fName, |
| gp.inColor()->fName); |
| } |
| |
| // For SkColor, do a red/blue swap and premul |
| if (gp.fFlags & kColorAttributeIsSkColor_GPFlag) { |
| vertBuilder->codeAppend("color = vec4(color.a * color.bgr, color.a);"); |
| } |
| |
| // Do color-correction to destination gamut |
| if (gp.linearizeColor()) { |
| fColorSpaceHelper.emitCode(uniformHandler, gp.fColorSpaceXform.get(), |
| kVertex_GrShaderFlag); |
| if (fColorSpaceHelper.isValid()) { |
| SkString xformedColor; |
| vertBuilder->appendColorGamutXform(&xformedColor, "color", |
| &fColorSpaceHelper); |
| vertBuilder->codeAppendf("color = %s;", xformedColor.c_str()); |
| } |
| } |
| 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 |
| this->setupPosition(vertBuilder, |
| uniformHandler, |
| gpArgs, |
| gp.inPosition()->fName, |
| gp.viewMatrix(), |
| &fViewMatrixUniform); |
| |
| if (gp.hasExplicitLocalCoords()) { |
| // emit transforms with explicit local coords |
| this->emitTransforms(vertBuilder, |
| varyingHandler, |
| uniformHandler, |
| gpArgs->fPositionVar, |
| gp.inLocalCoords()->fName, |
| gp.localMatrix(), |
| args.fFPCoordTransformHandler); |
| } else { |
| // emit transforms with position |
| this->emitTransforms(vertBuilder, |
| varyingHandler, |
| uniformHandler, |
| gpArgs->fPositionVar, |
| gp.inPosition()->fName, |
| gp.localMatrix(), |
| args.fFPCoordTransformHandler); |
| } |
| |
| // Setup coverage as pass through |
| if (gp.hasVertexCoverage()) { |
| fragBuilder->codeAppendf("float alpha = 1.0;"); |
| varyingHandler->addPassThroughAttribute(gp.inCoverage(), "alpha"); |
| fragBuilder->codeAppendf("%s = vec4(alpha);", args.fOutputCoverage); |
| } else if (gp.coverage() == 0xff) { |
| fragBuilder->codeAppendf("%s = vec4(1);", args.fOutputCoverage); |
| } else { |
| const char* fragCoverage; |
| fCoverageUniform = uniformHandler->addUniform(kFragment_GrShaderFlag, |
| kFloat_GrSLType, |
| kDefault_GrSLPrecision, |
| "Coverage", |
| &fragCoverage); |
| fragBuilder->codeAppendf("%s = vec4(%s);", args.fOutputCoverage, fragCoverage); |
| } |
| } |
| |
| static inline void GenKey(const GrGeometryProcessor& gp, |
| const GrShaderCaps&, |
| GrProcessorKeyBuilder* b) { |
| const DefaultGeoProc& def = gp.cast<DefaultGeoProc>(); |
| uint32_t key = def.fFlags; |
| key |= (def.coverage() == 0xff) ? 0x10 : 0; |
| key |= (def.localCoordsWillBeRead() && def.localMatrix().hasPerspective()) ? 0x20 : 0x0; |
| key |= ComputePosKey(def.viewMatrix()) << 20; |
| b->add32(key); |
| if (def.linearizeColor()) { |
| b->add32(GrColorSpaceXform::XformKey(def.fColorSpaceXform.get())); |
| } |
| } |
| |
| void setData(const GrGLSLProgramDataManager& pdman, |
| const GrPrimitiveProcessor& gp, |
| FPCoordTransformIter&& transformIter) override { |
| const DefaultGeoProc& dgp = gp.cast<DefaultGeoProc>(); |
| |
| if (!dgp.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(dgp.viewMatrix())) { |
| fViewMatrix = dgp.viewMatrix(); |
| float viewMatrix[3 * 3]; |
| GrGLSLGetMatrix<3>(viewMatrix, fViewMatrix); |
| pdman.setMatrix3f(fViewMatrixUniform, viewMatrix); |
| } |
| |
| if (dgp.color() != fColor && !dgp.hasVertexColor()) { |
| float c[4]; |
| GrColorToRGBAFloat(dgp.color(), c); |
| pdman.set4fv(fColorUniform, 1, c); |
| fColor = dgp.color(); |
| } |
| |
| if (dgp.coverage() != fCoverage && !dgp.hasVertexCoverage()) { |
| pdman.set1f(fCoverageUniform, GrNormalizeByteToFloat(dgp.coverage())); |
| fCoverage = dgp.coverage(); |
| } |
| this->setTransformDataHelper(dgp.fLocalMatrix, pdman, &transformIter); |
| |
| if (dgp.linearizeColor() && dgp.fColorSpaceXform) { |
| fColorSpaceHelper.setData(pdman, dgp.fColorSpaceXform.get()); |
| } |
| } |
| |
| private: |
| SkMatrix fViewMatrix; |
| GrColor fColor; |
| uint8_t fCoverage; |
| UniformHandle fViewMatrixUniform; |
| UniformHandle fColorUniform; |
| UniformHandle fCoverageUniform; |
| GrGLSLColorSpaceXformHelper fColorSpaceHelper; |
| |
| typedef GrGLSLGeometryProcessor INHERITED; |
| }; |
| |
| void getGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const override { |
| GLSLProcessor::GenKey(*this, caps, b); |
| } |
| |
| GrGLSLPrimitiveProcessor* createGLSLInstance(const GrShaderCaps&) const override { |
| return new GLSLProcessor(); |
| } |
| |
| private: |
| DefaultGeoProc(uint32_t gpTypeFlags, |
| GrColor color, |
| sk_sp<GrColorSpaceXform> colorSpaceXform, |
| const SkMatrix& viewMatrix, |
| const SkMatrix& localMatrix, |
| uint8_t coverage, |
| bool localCoordsWillBeRead) |
| : fColor(color) |
| , fViewMatrix(viewMatrix) |
| , fLocalMatrix(localMatrix) |
| , fCoverage(coverage) |
| , fFlags(gpTypeFlags) |
| , fLocalCoordsWillBeRead(localCoordsWillBeRead) |
| , fColorSpaceXform(std::move(colorSpaceXform)) { |
| this->initClassID<DefaultGeoProc>(); |
| fInPosition = &this->addVertexAttrib("inPosition", kVec2f_GrVertexAttribType, |
| kHigh_GrSLPrecision); |
| if (fFlags & kColorAttribute_GPFlag) { |
| fInColor = &this->addVertexAttrib("inColor", kVec4ub_GrVertexAttribType); |
| } |
| if (fFlags & kLocalCoordAttribute_GPFlag) { |
| fInLocalCoords = &this->addVertexAttrib("inLocalCoord", kVec2f_GrVertexAttribType, |
| kHigh_GrSLPrecision); |
| this->setHasExplicitLocalCoords(); |
| } |
| if (fFlags & kCoverageAttribute_GPFlag) { |
| fInCoverage = &this->addVertexAttrib("inCoverage", kFloat_GrVertexAttribType); |
| } |
| } |
| |
| const Attribute* fInPosition = nullptr; |
| const Attribute* fInColor = nullptr; |
| const Attribute* fInLocalCoords = nullptr; |
| const Attribute* fInCoverage = nullptr; |
| GrColor fColor; |
| SkMatrix fViewMatrix; |
| SkMatrix fLocalMatrix; |
| uint8_t fCoverage; |
| uint32_t fFlags; |
| bool fLocalCoordsWillBeRead; |
| sk_sp<GrColorSpaceXform> fColorSpaceXform; |
| |
| GR_DECLARE_GEOMETRY_PROCESSOR_TEST; |
| |
| typedef GrGeometryProcessor INHERITED; |
| }; |
| |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(DefaultGeoProc); |
| |
| #if GR_TEST_UTILS |
| sk_sp<GrGeometryProcessor> DefaultGeoProc::TestCreate(GrProcessorTestData* d) { |
| uint32_t flags = 0; |
| if (d->fRandom->nextBool()) { |
| flags |= kColorAttribute_GPFlag; |
| } |
| if (d->fRandom->nextBool()) { |
| flags |= kColorAttributeIsSkColor_GPFlag; |
| } |
| if (d->fRandom->nextBool()) { |
| flags |= kCoverageAttribute_GPFlag; |
| } |
| if (d->fRandom->nextBool()) { |
| flags |= kLocalCoordAttribute_GPFlag; |
| } |
| |
| return DefaultGeoProc::Make(flags, |
| GrRandomColor(d->fRandom), |
| GrTest::TestColorXform(d->fRandom), |
| GrTest::TestMatrix(d->fRandom), |
| GrTest::TestMatrix(d->fRandom), |
| d->fRandom->nextBool(), |
| GrRandomCoverage(d->fRandom)); |
| } |
| #endif |
| |
| sk_sp<GrGeometryProcessor> GrDefaultGeoProcFactory::Make(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::kUnpremulSkColorAttribute_Type == color.fType) { |
| flags |= kColorAttribute_GPFlag | kColorAttributeIsSkColor_GPFlag; |
| } |
| if (color.fLinearize) { |
| // It only makes sense to linearize SkColors (which are always sRGB). GrColor values should |
| // have been linearized and gamut-converted during paint conversion |
| SkASSERT(Color::kUnpremulSkColorAttribute_Type == color.fType); |
| flags |= kLinearizeColorAttribute_GPFlag; |
| } |
| flags |= coverage.fType == Coverage::kAttribute_Type ? kCoverageAttribute_GPFlag : 0; |
| flags |= localCoords.fType == LocalCoords::kHasExplicit_Type ? kLocalCoordAttribute_GPFlag : 0; |
| |
| uint8_t inCoverage = coverage.fCoverage; |
| bool localCoordsWillBeRead = localCoords.fType != LocalCoords::kUnused_Type; |
| |
| GrColor inColor = color.fColor; |
| return DefaultGeoProc::Make(flags, |
| inColor, |
| color.fColorSpaceXform, |
| viewMatrix, |
| localCoords.fMatrix ? *localCoords.fMatrix : SkMatrix::I(), |
| localCoordsWillBeRead, |
| inCoverage); |
| } |
| |
| sk_sp<GrGeometryProcessor> GrDefaultGeoProcFactory::MakeForDeviceSpace( |
| 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)) { |
| SkDebugf("Could not invert\n"); |
| return nullptr; |
| } |
| |
| if (localCoords.hasLocalMatrix()) { |
| invert.preConcat(*localCoords.fMatrix); |
| } |
| } |
| |
| LocalCoords inverted(LocalCoords::kUsePosition_Type, &invert); |
| return Make(color, coverage, inverted, SkMatrix::I()); |
| } |