/* * Copyright 2018 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "gm/gm.h" #include "include/core/SkBlendMode.h" #include "include/core/SkCanvas.h" #include "include/core/SkColorSpace.h" #include "include/core/SkMatrix.h" #include "include/core/SkPoint.h" #include "include/core/SkRect.h" #include "include/core/SkRefCnt.h" #include "include/core/SkSize.h" #include "include/core/SkString.h" #include "include/core/SkTypes.h" #include "include/gpu/GrContext.h" #include "include/gpu/GrSamplerState.h" #include "include/gpu/GrTypes.h" #include "include/private/GrRecordingContext.h" #include "include/private/GrTypesPriv.h" #include "include/private/SkColorData.h" #include "src/gpu/GrBuffer.h" #include "src/gpu/GrCaps.h" #include "src/gpu/GrClip.h" #include "src/gpu/GrColorSpaceXform.h" #include "src/gpu/GrContextPriv.h" #include "src/gpu/GrGeometryProcessor.h" #include "src/gpu/GrGpuBuffer.h" #include "src/gpu/GrGpuCommandBuffer.h" #include "src/gpu/GrMemoryPool.h" #include "src/gpu/GrMesh.h" #include "src/gpu/GrOpFlushState.h" #include "src/gpu/GrPipeline.h" #include "src/gpu/GrPrimitiveProcessor.h" #include "src/gpu/GrProcessor.h" #include "src/gpu/GrProcessorSet.h" #include "src/gpu/GrRecordingContextPriv.h" #include "src/gpu/GrRenderTargetContext.h" #include "src/gpu/GrRenderTargetContextPriv.h" #include "src/gpu/GrResourceProvider.h" #include "src/gpu/GrShaderCaps.h" #include "src/gpu/GrShaderVar.h" #include "src/gpu/GrSurfaceProxy.h" #include "src/gpu/GrTextureProxy.h" #include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h" #include "src/gpu/glsl/GrGLSLGeometryProcessor.h" #include "src/gpu/glsl/GrGLSLPrimitiveProcessor.h" #include "src/gpu/glsl/GrGLSLVarying.h" #include "src/gpu/ops/GrDrawOp.h" #include "src/gpu/ops/GrOp.h" #include #include class GrAppliedClip; class GrGLSLProgramDataManager; namespace { static constexpr GrGeometryProcessor::Attribute gVertex = {"position", kFloat2_GrVertexAttribType, kFloat2_GrSLType}; /** * This is a GPU-backend specific test. It ensures that SkSL properly identifies clockwise-winding * triangles (sk_Clockwise), in terms of to Skia device space, in all backends and with all render * target origins. We draw clockwise triangles green and counter-clockwise red. */ class ClockwiseGM : public skiagm::GpuGM { SkString onShortName() override { return SkString("clockwise"); } SkISize onISize() override { return {300, 200}; } void onDraw(GrContext*, GrRenderTargetContext*, SkCanvas*) override; }; //////////////////////////////////////////////////////////////////////////////////////////////////// // SkSL code. class ClockwiseTestProcessor : public GrGeometryProcessor { public: ClockwiseTestProcessor(bool readSkFragCoord) : GrGeometryProcessor(kClockwiseTestProcessor_ClassID) , fReadSkFragCoord(readSkFragCoord) { this->setVertexAttributes(&gVertex, 1); } const char* name() const override { return "ClockwiseTestProcessor"; } void getGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder* b) const final { b->add32(fReadSkFragCoord); } GrGLSLPrimitiveProcessor* createGLSLInstance(const GrShaderCaps&) const final; private: const bool fReadSkFragCoord; friend class GLSLClockwiseTestProcessor; }; class GLSLClockwiseTestProcessor : public GrGLSLGeometryProcessor { void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor&, FPCoordTransformIter&& transformIter) override {} void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override { const ClockwiseTestProcessor& proc = args.fGP.cast(); args.fVaryingHandler->emitAttributes(proc); gpArgs->fPositionVar.set(kFloat2_GrSLType, "position"); args.fFragBuilder->codeAppendf( "%s = sk_Clockwise ? half4(0,1,0,1) : half4(1,0,0,1);", args.fOutputColor); if (!proc.fReadSkFragCoord) { args.fFragBuilder->codeAppendf("%s = half4(1);", args.fOutputCoverage); } else { // Verify layout(origin_upper_left) on gl_FragCoord does not affect gl_FrontFacing. args.fFragBuilder->codeAppendf("%s = half4(min(half(sk_FragCoord.y), 1));", args.fOutputCoverage); } } }; GrGLSLPrimitiveProcessor* ClockwiseTestProcessor::createGLSLInstance( const GrShaderCaps&) const { return new GLSLClockwiseTestProcessor; } //////////////////////////////////////////////////////////////////////////////////////////////////// // Draw Op. class ClockwiseTestOp : public GrDrawOp { public: DEFINE_OP_CLASS_ID static std::unique_ptr Make(GrRecordingContext* context, bool readSkFragCoord, int y = 0) { GrOpMemoryPool* pool = context->priv().opMemoryPool(); return pool->allocate(readSkFragCoord, y); } private: ClockwiseTestOp(bool readSkFragCoord, float y) : GrDrawOp(ClassID()), fReadSkFragCoord(readSkFragCoord), fY(y) { this->setBounds(SkRect::MakeIWH(300, 100), HasAABloat::kNo, IsZeroArea::kNo); } const char* name() const override { return "ClockwiseTestOp"; } FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; } GrProcessorSet::Analysis finalize(const GrCaps&, const GrAppliedClip*, bool hasMixedSampledCoverage, GrClampType) override { return GrProcessorSet::EmptySetAnalysis(); } void onPrepare(GrOpFlushState*) override {} void onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) override { SkPoint vertices[4] = { {100, fY}, {0, fY+100}, {0, fY}, {100, fY+100}, }; sk_sp vertexBuffer(flushState->resourceProvider()->createBuffer( sizeof(vertices), GrGpuBufferType::kVertex, kStatic_GrAccessPattern, vertices)); if (!vertexBuffer) { return; } GrPipeline pipeline(GrScissorTest::kDisabled, SkBlendMode::kPlus, flushState->drawOpArgs().fOutputSwizzle); GrMesh mesh(GrPrimitiveType::kTriangleStrip); mesh.setNonIndexedNonInstanced(4); mesh.setVertexData(std::move(vertexBuffer)); flushState->rtCommandBuffer()->draw(ClockwiseTestProcessor(fReadSkFragCoord), pipeline, nullptr, nullptr, &mesh, 1, SkRect::MakeIWH(100, 100)); } const bool fReadSkFragCoord; const float fY; friend class ::GrOpMemoryPool; // for ctor }; //////////////////////////////////////////////////////////////////////////////////////////////////// // Test. void ClockwiseGM::onDraw(GrContext* ctx, GrRenderTargetContext* rtc, SkCanvas* canvas) { rtc->clear(nullptr, { 0, 0, 0, 1 }, GrRenderTargetContext::CanClearFullscreen::kYes); // Draw the test directly to the frame buffer. rtc->priv().testingOnly_addDrawOp(ClockwiseTestOp::Make(ctx, false, 0)); rtc->priv().testingOnly_addDrawOp(ClockwiseTestOp::Make(ctx, true, 100)); // Draw the test to an off-screen, top-down render target. if (auto topLeftRTC = ctx->priv().makeDeferredRenderTargetContext( SkBackingFit::kExact, 100, 200, rtc->colorSpaceInfo().colorType(), nullptr, 1, GrMipMapped::kNo, kTopLeft_GrSurfaceOrigin, nullptr, SkBudgeted::kYes)) { topLeftRTC->clear(nullptr, SK_PMColor4fTRANSPARENT, GrRenderTargetContext::CanClearFullscreen::kYes); topLeftRTC->priv().testingOnly_addDrawOp(ClockwiseTestOp::Make(ctx, false, 0)); topLeftRTC->priv().testingOnly_addDrawOp(ClockwiseTestOp::Make(ctx, true, 100)); rtc->drawTexture(GrNoClip(), sk_ref_sp(topLeftRTC->asTextureProxy()), GrSamplerState::Filter::kNearest, SkBlendMode::kSrcOver, SK_PMColor4fWHITE, {0, 0, 100, 200}, {100, 0, 200, 200}, GrAA::kNo, GrQuadAAFlags::kNone, SkCanvas::SrcRectConstraint::kStrict_SrcRectConstraint, SkMatrix::I(), nullptr); } // Draw the test to an off-screen, bottom-up render target. if (auto topLeftRTC = ctx->priv().makeDeferredRenderTargetContext( SkBackingFit::kExact, 100, 200, rtc->colorSpaceInfo().colorType(), nullptr, 1, GrMipMapped::kNo, kBottomLeft_GrSurfaceOrigin, nullptr, SkBudgeted::kYes)) { topLeftRTC->clear(nullptr, SK_PMColor4fTRANSPARENT, GrRenderTargetContext::CanClearFullscreen::kYes); topLeftRTC->priv().testingOnly_addDrawOp(ClockwiseTestOp::Make(ctx, false, 0)); topLeftRTC->priv().testingOnly_addDrawOp(ClockwiseTestOp::Make(ctx, true, 100)); rtc->drawTexture(GrNoClip(), sk_ref_sp(topLeftRTC->asTextureProxy()), GrSamplerState::Filter::kNearest, SkBlendMode::kSrcOver, SK_PMColor4fWHITE, {0, 0, 100, 200}, {200, 0, 300, 200}, GrAA::kNo, GrQuadAAFlags::kNone, SkCanvas::SrcRectConstraint::kStrict_SrcRectConstraint, SkMatrix::I(), nullptr); } } //////////////////////////////////////////////////////////////////////////////////////////////////// DEF_GM( return new ClockwiseGM(); ) }