| /* |
| * 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 "GrCaps.h" |
| #include "SkRefCnt.h" |
| #include "glsl/GrGLSLColorSpaceXformHelper.h" |
| #include "glsl/GrGLSLFragmentShaderBuilder.h" |
| #include "glsl/GrGLSLGeometryProcessor.h" |
| #include "glsl/GrGLSLVertexGeoBuilder.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, |
| kColorAttributeIsWide_GPFlag = 0x4, |
| kLocalCoordAttribute_GPFlag = 0x8, |
| kCoverageAttribute_GPFlag = 0x10, |
| kCoverageAttributeTweak_GPFlag = 0x20, |
| kBonesAttribute_GPFlag = 0x40, |
| }; |
| |
| static constexpr int kNumVec2sPerBone = 3; // Our bone matrices are 3x2 matrices passed in as |
| // vec2s in column major order, and thus there are 3 |
| // vec2s per bone. |
| |
| class DefaultGeoProc : public GrGeometryProcessor { |
| public: |
| static sk_sp<GrGeometryProcessor> Make(const GrShaderCaps* shaderCaps, |
| uint32_t gpTypeFlags, |
| const SkPMColor4f& color, |
| sk_sp<GrColorSpaceXform> colorSpaceXform, |
| const SkMatrix& viewMatrix, |
| const SkMatrix& localMatrix, |
| bool localCoordsWillBeRead, |
| uint8_t coverage, |
| const float* bones, |
| int boneCount) { |
| return sk_sp<GrGeometryProcessor>(new DefaultGeoProc( |
| shaderCaps, gpTypeFlags, color, std::move(colorSpaceXform), viewMatrix, localMatrix, |
| coverage, localCoordsWillBeRead, bones, boneCount)); |
| } |
| |
| 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(); } |
| const float* bones() const { return fBones; } |
| int boneCount() const { return fBoneCount; } |
| bool hasBones() const { return SkToBool(fBones); } |
| |
| class GLSLProcessor : public GrGLSLGeometryProcessor { |
| public: |
| GLSLProcessor() |
| : fViewMatrix(SkMatrix::InvalidMatrix()) |
| , fColor(SK_PMColor4fILLEGAL) |
| , fCoverage(0xff) {} |
| |
| void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override { |
| const DefaultGeoProc& gp = args.fGP.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 |
| if (gp.hasVertexColor() || tweakAlpha) { |
| GrGLSLVarying varying(kHalf4_GrSLType); |
| varyingHandler->addVarying("color", &varying); |
| |
| // There are several optional steps to process the color. Start with the attribute, |
| // or with uniform color (in the case of folding coverage into a uniform color): |
| if (gp.hasVertexColor()) { |
| vertBuilder->codeAppendf("half4 color = %s;", gp.fInColor.name()); |
| } else { |
| const char* colorUniformName; |
| fColorUniform = uniformHandler->addUniform(kVertex_GrShaderFlag, |
| kHalf4_GrSLType, |
| "Color", |
| &colorUniformName); |
| vertBuilder->codeAppendf("half4 color = %s;", colorUniformName); |
| } |
| |
| // For SkColor, do a red/blue swap, possible color space conversion, and premul |
| if (gp.fFlags & kColorAttributeIsSkColor_GPFlag) { |
| vertBuilder->codeAppend("color = color.bgra;"); |
| |
| if (gp.fColorSpaceXform) { |
| fColorSpaceHelper.emitCode(uniformHandler, gp.fColorSpaceXform.get(), |
| kVertex_GrShaderFlag); |
| SkString xformedColor; |
| vertBuilder->appendColorGamutXform(&xformedColor, "color", |
| &fColorSpaceHelper); |
| vertBuilder->codeAppendf("color = %s;", xformedColor.c_str()); |
| } |
| |
| vertBuilder->codeAppend("color = half4(color.rgb * color.a, color.a);"); |
| } |
| |
| // 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 bone transforms |
| // NOTE: This code path is currently unused. Benchmarks have found that for all |
| // reasonable cases of skinned vertices, the overhead involved in copying and uploading |
| // bone data makes performing the transformations on the CPU faster than doing so on |
| // the GPU. This is being kept here in case that changes. |
| const char* transformedPositionName = gp.fInPosition.name(); |
| if (gp.hasBones()) { |
| // Set up the uniform for the bones. |
| const char* vertBonesUniformName; |
| fBonesUniform = uniformHandler->addUniformArray(kVertex_GrShaderFlag, |
| kFloat2_GrSLType, |
| "Bones", |
| kMaxBones * kNumVec2sPerBone, |
| &vertBonesUniformName); |
| |
| // Set up the bone application function. |
| SkString applyBoneFunctionName; |
| this->emitApplyBoneFunction(vertBuilder, |
| vertBonesUniformName, |
| &applyBoneFunctionName); |
| |
| // Apply the world transform to the position first. |
| vertBuilder->codeAppendf( |
| "float2 worldPosition = %s(0, %s);" |
| "float2 transformedPosition = float2(0, 0);" |
| "for (int i = 0; i < 4; i++) {", |
| applyBoneFunctionName.c_str(), |
| gp.fInPosition.name()); |
| |
| // If the GPU supports unsigned integers, then we can read the index. Otherwise, |
| // we have to estimate it given the float representation. |
| if (args.fShaderCaps->unsignedSupport()) { |
| vertBuilder->codeAppendf( |
| " byte index = %s[i];", |
| gp.fInBoneIndices.name()); |
| } else { |
| vertBuilder->codeAppendf( |
| " byte index = byte(floor(%s[i] * 255 + 0.5));", |
| gp.fInBoneIndices.name()); |
| } |
| |
| // Get the weight and apply the transformation. |
| vertBuilder->codeAppendf( |
| " float weight = %s[i];" |
| " transformedPosition += %s(index, worldPosition) * weight;" |
| "}", |
| gp.fInBoneWeights.name(), |
| applyBoneFunctionName.c_str()); |
| transformedPositionName = "transformedPosition"; |
| } |
| |
| // Setup position |
| this->writeOutputPosition(vertBuilder, |
| uniformHandler, |
| gpArgs, |
| transformedPositionName, |
| gp.viewMatrix(), |
| &fViewMatrixUniform); |
| |
| if (gp.fInLocalCoords.isInitialized()) { |
| // emit transforms with explicit local coords |
| this->emitTransforms(vertBuilder, |
| varyingHandler, |
| uniformHandler, |
| gp.fInLocalCoords.asShaderVar(), |
| gp.localMatrix(), |
| args.fFPCoordTransformHandler); |
| } else { |
| // emit transforms with position |
| this->emitTransforms(vertBuilder, |
| varyingHandler, |
| uniformHandler, |
| gp.fInPosition.asShaderVar(), |
| gp.localMatrix(), |
| args.fFPCoordTransformHandler); |
| } |
| |
| // Setup coverage as pass through |
| if (gp.hasVertexCoverage() && !tweakAlpha) { |
| fragBuilder->codeAppendf("half alpha = 1.0;"); |
| varyingHandler->addPassThroughAttribute(gp.fInCoverage, "alpha"); |
| fragBuilder->codeAppendf("%s = half4(alpha);", args.fOutputCoverage); |
| } else if (gp.coverage() == 0xff) { |
| fragBuilder->codeAppendf("%s = half4(1);", args.fOutputCoverage); |
| } else { |
| const char* fragCoverage; |
| fCoverageUniform = uniformHandler->addUniform(kFragment_GrShaderFlag, |
| kHalf_GrSLType, |
| "Coverage", |
| &fragCoverage); |
| fragBuilder->codeAppendf("%s = half4(%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) ? 0x80 : 0; |
| key |= (def.localCoordsWillBeRead() && def.localMatrix().hasPerspective()) ? 0x100 : 0; |
| key |= ComputePosKey(def.viewMatrix()) << 20; |
| b->add32(key); |
| 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.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(); |
| } |
| this->setTransformDataHelper(dgp.fLocalMatrix, pdman, &transformIter); |
| |
| fColorSpaceHelper.setData(pdman, dgp.fColorSpaceXform.get()); |
| |
| if (dgp.hasBones()) { |
| pdman.set2fv(fBonesUniform, dgp.boneCount() * kNumVec2sPerBone, dgp.bones()); |
| } |
| } |
| |
| private: |
| void emitApplyBoneFunction(GrGLSLVertexBuilder* vertBuilder, |
| const char* vertBonesUniformName, |
| SkString* funcName) { |
| // The bone matrices are passed in as 3x2 matrices in column-major order as groups |
| // of 3 float2s. This code takes those float2s and performs the matrix operation on |
| // a given matrix and float2. |
| const GrShaderVar gApplyBoneArgs[] = { |
| GrShaderVar("index", kByte_GrSLType), |
| GrShaderVar("vec", kFloat2_GrSLType), |
| }; |
| SkString body; |
| body.appendf( |
| " float2 c0 = %s[index * 3];" |
| " float2 c1 = %s[index * 3 + 1];" |
| " float2 c2 = %s[index * 3 + 2];" |
| " float x = c0.x * vec.x + c1.x * vec.y + c2.x;" |
| " float y = c0.y * vec.x + c1.y * vec.y + c2.y;" |
| " return float2(x, y);", |
| vertBonesUniformName, |
| vertBonesUniformName, |
| vertBonesUniformName); |
| vertBuilder->emitFunction(kFloat2_GrSLType, |
| "applyBone", |
| SK_ARRAY_COUNT(gApplyBoneArgs), |
| gApplyBoneArgs, |
| body.c_str(), |
| funcName); |
| } |
| |
| private: |
| SkMatrix fViewMatrix; |
| SkPMColor4f fColor; |
| uint8_t fCoverage; |
| UniformHandle fViewMatrixUniform; |
| UniformHandle fColorUniform; |
| UniformHandle fCoverageUniform; |
| UniformHandle fBonesUniform; |
| 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(const GrShaderCaps* shaderCaps, |
| uint32_t gpTypeFlags, |
| const SkPMColor4f& color, |
| sk_sp<GrColorSpaceXform> colorSpaceXform, |
| const SkMatrix& viewMatrix, |
| const SkMatrix& localMatrix, |
| uint8_t coverage, |
| bool localCoordsWillBeRead, |
| const float* bones, |
| int boneCount) |
| : INHERITED(kDefaultGeoProc_ClassID) |
| , fColor(color) |
| , fViewMatrix(viewMatrix) |
| , fLocalMatrix(localMatrix) |
| , fCoverage(coverage) |
| , fFlags(gpTypeFlags) |
| , fLocalCoordsWillBeRead(localCoordsWillBeRead) |
| , fColorSpaceXform(std::move(colorSpaceXform)) |
| , fBones(bones) |
| , fBoneCount(boneCount) { |
| 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}; |
| } |
| if (fFlags & kBonesAttribute_GPFlag) { |
| SkASSERT(bones && (boneCount > 0)); |
| // GLSL 1.10 and 1.20 don't support integer attributes. |
| GrVertexAttribType indicesCPUType = kByte4_GrVertexAttribType; |
| GrSLType indicesGPUType = kByte4_GrSLType; |
| if (!shaderCaps->unsignedSupport()) { |
| indicesCPUType = kUByte4_norm_GrVertexAttribType; |
| indicesGPUType = kHalf4_GrSLType; |
| } |
| fInBoneIndices = {"inBoneIndices", indicesCPUType, indicesGPUType}; |
| fInBoneWeights = {"inBoneWeights", kUByte4_norm_GrVertexAttribType, |
| kHalf4_GrSLType}; |
| } |
| this->setVertexAttributes(&fInPosition, 6); |
| } |
| |
| Attribute fInPosition; |
| Attribute fInColor; |
| Attribute fInLocalCoords; |
| Attribute fInCoverage; |
| Attribute fInBoneIndices; |
| Attribute fInBoneWeights; |
| SkPMColor4f fColor; |
| SkMatrix fViewMatrix; |
| SkMatrix fLocalMatrix; |
| uint8_t fCoverage; |
| uint32_t fFlags; |
| bool fLocalCoordsWillBeRead; |
| sk_sp<GrColorSpaceXform> fColorSpaceXform; |
| const float* fBones; |
| int fBoneCount; |
| |
| GR_DECLARE_GEOMETRY_PROCESSOR_TEST |
| |
| typedef GrGeometryProcessor INHERITED; |
| }; |
| |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(DefaultGeoProc); |
| |
| #if GR_TEST_UTILS |
| static constexpr int kNumFloatsPerBone = 6; |
| static constexpr int kTestBoneCount = 4; |
| static constexpr float kTestBones[kTestBoneCount * kNumFloatsPerBone] = { |
| 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, |
| 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, |
| 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, |
| 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, |
| }; |
| |
| 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 |= kColorAttributeIsWide_GPFlag; |
| } |
| if (d->fRandom->nextBool()) { |
| flags |= kCoverageAttribute_GPFlag; |
| if (d->fRandom->nextBool()) { |
| flags |= kCoverageAttributeTweak_GPFlag; |
| } |
| } |
| if (d->fRandom->nextBool()) { |
| flags |= kLocalCoordAttribute_GPFlag; |
| } |
| if (d->fRandom->nextBool()) { |
| flags |= kBonesAttribute_GPFlag; |
| } |
| |
| return DefaultGeoProc::Make(d->caps()->shaderCaps(), |
| flags, |
| SkPMColor4f::FromBytes_RGBA(GrRandomColor(d->fRandom)), |
| GrTest::TestColorXform(d->fRandom), |
| GrTest::TestMatrix(d->fRandom), |
| GrTest::TestMatrix(d->fRandom), |
| d->fRandom->nextBool(), |
| GrRandomCoverage(d->fRandom), |
| kTestBones, |
| kTestBoneCount); |
| } |
| #endif |
| |
| sk_sp<GrGeometryProcessor> GrDefaultGeoProcFactory::Make(const GrShaderCaps* shaderCaps, |
| 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; |
| } 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(shaderCaps, |
| flags, |
| color.fColor, |
| color.fColorSpaceXform, |
| viewMatrix, |
| localCoords.fMatrix ? *localCoords.fMatrix : SkMatrix::I(), |
| localCoordsWillBeRead, |
| inCoverage, |
| nullptr, |
| 0); |
| } |
| |
| sk_sp<GrGeometryProcessor> GrDefaultGeoProcFactory::MakeForDeviceSpace( |
| const GrShaderCaps* shaderCaps, |
| 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(shaderCaps, color, coverage, inverted, SkMatrix::I()); |
| } |
| |
| sk_sp<GrGeometryProcessor> GrDefaultGeoProcFactory::MakeWithBones(const GrShaderCaps* shaderCaps, |
| const Color& color, |
| const Coverage& coverage, |
| const LocalCoords& localCoords, |
| const Bones& bones, |
| 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; |
| } 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; |
| flags |= kBonesAttribute_GPFlag; |
| |
| uint8_t inCoverage = coverage.fCoverage; |
| bool localCoordsWillBeRead = localCoords.fType != LocalCoords::kUnused_Type; |
| |
| return DefaultGeoProc::Make(shaderCaps, |
| flags, |
| color.fColor, |
| color.fColorSpaceXform, |
| viewMatrix, |
| localCoords.fMatrix ? *localCoords.fMatrix : SkMatrix::I(), |
| localCoordsWillBeRead, |
| inCoverage, |
| bones.fBones, |
| bones.fBoneCount); |
| } |
