tests/GLProgramsTest.cpp - platform/external/skia - Gitiles

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 // This is a GPU-backend specific test. It relies on static intializers to work

 #include "SkTypes.h"

 #if SK_SUPPORT_GPU && SK_ALLOW_STATIC_GLOBAL_INITIALIZERS

 #include "GrAutoLocaleSetter.h"
 #include "GrContextFactory.h"
 #include "GrContextPriv.h"
 #include "GrDrawOpTest.h"
 #include "GrDrawingManager.h"
 #include "GrPipeline.h"
 #include "GrRenderTargetContextPriv.h"
 #include "GrTest.h"
 #include "GrXferProcessor.h"
 #include "SkChecksum.h"
 #include "SkRandom.h"
 #include "Test.h"

 #include "ops/GrDrawOp.h"

 #include "effects/GrConfigConversionEffect.h"
 #include "effects/GrPorterDuffXferProcessor.h"
 #include "effects/GrXfermodeFragmentProcessor.h"

 #include "gl/GrGLGpu.h"
 #include "glsl/GrGLSLFragmentProcessor.h"
 #include "glsl/GrGLSLFragmentShaderBuilder.h"
 #include "glsl/GrGLSLProgramBuilder.h"

 /*
  * A dummy processor which just tries to insert a massive key and verify that it can retrieve the
  * whole thing correctly
  */
 static const uint32_t kMaxKeySize = 1024;

 class GLBigKeyProcessor : public GrGLSLFragmentProcessor {
 public:
     void emitCode(EmitArgs& args) override {
         // pass through
         GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
         if (args.fInputColor) {
             fragBuilder->codeAppendf("%s = %s;\n", args.fOutputColor, args.fInputColor);
         } else {
             fragBuilder->codeAppendf("%s = vec4(1.0);\n", args.fOutputColor);
         }
     }

     static void GenKey(const GrProcessor&, const GrShaderCaps&, GrProcessorKeyBuilder* b) {
         for (uint32_t i = 0; i < kMaxKeySize; i++) {
             b->add32(i);
         }
     }

 private:
     typedef GrGLSLFragmentProcessor INHERITED;
 };

 class BigKeyProcessor : public GrFragmentProcessor {
 public:
     static std::unique_ptr<GrFragmentProcessor> Make() {
         return std::unique_ptr<GrFragmentProcessor>(new BigKeyProcessor);
     }

     const char* name() const override { return "Big Ole Key"; }

     GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
         return new GLBigKeyProcessor;
     }

     std::unique_ptr<GrFragmentProcessor> clone() const override { return Make(); }

 private:
     BigKeyProcessor() : INHERITED(kNone_OptimizationFlags) { this->initClassID<BigKeyProcessor>(); }
     virtual void onGetGLSLProcessorKey(const GrShaderCaps& caps,
                                        GrProcessorKeyBuilder* b) const override {
         GLBigKeyProcessor::GenKey(*this, caps, b);
     }
     bool onIsEqual(const GrFragmentProcessor&) const override { return true; }

     GR_DECLARE_FRAGMENT_PROCESSOR_TEST

     typedef GrFragmentProcessor INHERITED;
 };

 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(BigKeyProcessor);

 #if GR_TEST_UTILS
 std::unique_ptr<GrFragmentProcessor> BigKeyProcessor::TestCreate(GrProcessorTestData*) {
     return BigKeyProcessor::Make();
 }
 #endif

 //////////////////////////////////////////////////////////////////////////////

 class BlockInputFragmentProcessor : public GrFragmentProcessor {
 public:
     static std::unique_ptr<GrFragmentProcessor> Make(std::unique_ptr<GrFragmentProcessor> fp) {
         return std::unique_ptr<GrFragmentProcessor>(new BlockInputFragmentProcessor(std::move(fp)));
     }

     const char* name() const override { return "Block Input"; }

     GrGLSLFragmentProcessor* onCreateGLSLInstance() const override { return new GLFP; }

     std::unique_ptr<GrFragmentProcessor> clone() const override {
         return Make(this->childProcessor(0).clone());
     }

 private:
     class GLFP : public GrGLSLFragmentProcessor {
     public:
         void emitCode(EmitArgs& args) override {
             this->emitChild(0, args);
         }

     private:
         typedef GrGLSLFragmentProcessor INHERITED;
     };

     BlockInputFragmentProcessor(std::unique_ptr<GrFragmentProcessor> child)
             : INHERITED(kNone_OptimizationFlags) {
         this->initClassID<BlockInputFragmentProcessor>();
         this->registerChildProcessor(std::move(child));
     }

     void onGetGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const override {}

     bool onIsEqual(const GrFragmentProcessor&) const override { return true; }

     typedef GrFragmentProcessor INHERITED;
 };

 //////////////////////////////////////////////////////////////////////////////

 /*
  * Begin test code
  */
 static const int kRenderTargetHeight = 1;
 static const int kRenderTargetWidth = 1;

 static sk_sp<GrRenderTargetContext> random_render_target_context(GrContext* context,
                                                                  SkRandom* random,
                                                                  const GrCaps* caps) {
     GrSurfaceOrigin origin = random->nextBool() ? kTopLeft_GrSurfaceOrigin
                                                 : kBottomLeft_GrSurfaceOrigin;
     int sampleCnt = random->nextBool() ? caps->getSampleCount(4, kRGBA_8888_GrPixelConfig) : 0;

     sk_sp<GrRenderTargetContext> renderTargetContext(context->makeDeferredRenderTargetContext(
                                                                            SkBackingFit::kExact,
                                                                            kRenderTargetWidth,
                                                                            kRenderTargetHeight,
                                                                            kRGBA_8888_GrPixelConfig,
                                                                            nullptr,
                                                                            sampleCnt,
                                                                            origin));
     return renderTargetContext;
 }

 #if GR_TEST_UTILS
 static void set_random_xpf(GrPaint* paint, GrProcessorTestData* d) {
     paint->setXPFactory(GrXPFactoryTestFactory::Get(d));
 }

 static std::unique_ptr<GrFragmentProcessor> create_random_proc_tree(GrProcessorTestData* d,
                                                                     int minLevels, int maxLevels) {
     SkASSERT(1 <= minLevels);
     SkASSERT(minLevels <= maxLevels);

     // Return a leaf node if maxLevels is 1 or if we randomly chose to terminate.
     // If returning a leaf node, make sure that it doesn't have children (e.g. another
     // GrComposeEffect)
     const float terminateProbability = 0.3f;
     if (1 == minLevels) {
         bool terminate = (1 == maxLevels) || (d->fRandom->nextF() < terminateProbability);
         if (terminate) {
             std::unique_ptr<GrFragmentProcessor> fp;
             while (true) {
                 fp = GrFragmentProcessorTestFactory::Make(d);
                 SkASSERT(fp);
                 if (0 == fp->numChildProcessors()) {
                     break;
                 }
             }
             return fp;
         }
     }
     // If we didn't terminate, choose either the left or right subtree to fulfill
     // the minLevels requirement of this tree; the other child can have as few levels as it wants.
     // Also choose a random xfer mode.
     if (minLevels > 1) {
         --minLevels;
     }
     auto minLevelsChild = create_random_proc_tree(d, minLevels, maxLevels - 1);
     std::unique_ptr<GrFragmentProcessor> otherChild(create_random_proc_tree(d, 1, maxLevels - 1));
     SkBlendMode mode = static_cast<SkBlendMode>(d->fRandom->nextRangeU(0,
                                                                (int)SkBlendMode::kLastMode));
     std::unique_ptr<GrFragmentProcessor> fp;
     if (d->fRandom->nextF() < 0.5f) {
         fp = GrXfermodeFragmentProcessor::MakeFromTwoProcessors(std::move(minLevelsChild),
                                                                 std::move(otherChild), mode);
         SkASSERT(fp);
     } else {
         fp = GrXfermodeFragmentProcessor::MakeFromTwoProcessors(std::move(otherChild),
                                                                 std::move(minLevelsChild), mode);
         SkASSERT(fp);
     }
     return fp;
 }

 static void set_random_color_coverage_stages(GrPaint* paint,
                                              GrProcessorTestData* d,
                                              int maxStages,
                                              int maxTreeLevels) {
     // Randomly choose to either create a linear pipeline of procs or create one proc tree
     const float procTreeProbability = 0.5f;
     if (d->fRandom->nextF() < procTreeProbability) {
         std::unique_ptr<GrFragmentProcessor> fp(create_random_proc_tree(d, 2, maxTreeLevels));
         if (fp) {
             paint->addColorFragmentProcessor(std::move(fp));
         }
     } else {
         int numProcs = d->fRandom->nextULessThan(maxStages + 1);
         int numColorProcs = d->fRandom->nextULessThan(numProcs + 1);

         for (int s = 0; s < numProcs;) {
             std::unique_ptr<GrFragmentProcessor> fp(GrFragmentProcessorTestFactory::Make(d));
             SkASSERT(fp);

             // finally add the stage to the correct pipeline in the drawstate
             if (s < numColorProcs) {
                 paint->addColorFragmentProcessor(std::move(fp));
             } else {
                 paint->addCoverageFragmentProcessor(std::move(fp));
             }
             ++s;
         }
     }
 }

 static void set_random_state(GrPaint* paint, SkRandom* random) {
     if (random->nextBool()) {
         paint->setDisableOutputConversionToSRGB(true);
     }
     if (random->nextBool()) {
         paint->setAllowSRGBInputs(true);
     }
 }

 #endif

 #if !GR_TEST_UTILS
 bool GrDrawingManager::ProgramUnitTest(GrContext*, int) { return true; }
 #else
 bool GrDrawingManager::ProgramUnitTest(GrContext* context, int maxStages, int maxLevels) {
     GrDrawingManager* drawingManager = context->contextPriv().drawingManager();

     sk_sp<GrTextureProxy> proxies[2];

     // setup dummy textures
     GrSurfaceDesc dummyDesc;
     dummyDesc.fFlags = kRenderTarget_GrSurfaceFlag;
     dummyDesc.fOrigin = kBottomLeft_GrSurfaceOrigin;
     dummyDesc.fWidth = 34;
     dummyDesc.fHeight = 18;
     dummyDesc.fConfig = kRGBA_8888_GrPixelConfig;
     proxies[0] = GrSurfaceProxy::MakeDeferred(context->resourceProvider(),
                                               dummyDesc, SkBudgeted::kNo, nullptr, 0);
     dummyDesc.fFlags = kNone_GrSurfaceFlags;
     dummyDesc.fOrigin = kTopLeft_GrSurfaceOrigin;
     dummyDesc.fWidth = 16;
     dummyDesc.fHeight = 22;
     dummyDesc.fConfig = kAlpha_8_GrPixelConfig;
     proxies[1] = GrSurfaceProxy::MakeDeferred(context->resourceProvider(),
                                               dummyDesc, SkBudgeted::kNo, nullptr, 0);

     if (!proxies[0] || !proxies[1]) {
         SkDebugf("Could not allocate dummy textures");
         return false;
     }

     // dummy scissor state
     GrScissorState scissor;

     SkRandom random;
     static const int NUM_TESTS = 1024;
     for (int t = 0; t < NUM_TESTS; t++) {
         // setup random render target(can fail)
         sk_sp<GrRenderTargetContext> renderTargetContext(random_render_target_context(
             context, &random, context->caps()));
         if (!renderTargetContext) {
             SkDebugf("Could not allocate renderTargetContext");
             return false;
         }

         GrPaint paint;
         GrProcessorTestData ptd(&random, context, renderTargetContext.get(), proxies);
         set_random_color_coverage_stages(&paint, &ptd, maxStages, maxLevels);
         set_random_xpf(&paint, &ptd);
         set_random_state(&paint, &random);
         GrDrawRandomOp(&random, renderTargetContext.get(), std::move(paint));
     }
     // Flush everything, test passes if flush is successful(ie, no asserts are hit, no crashes)
     drawingManager->flush(nullptr);

     // Validate that GrFPs work correctly without an input.
     sk_sp<GrRenderTargetContext> renderTargetContext(context->makeDeferredRenderTargetContext(
                                                                            SkBackingFit::kExact,
                                                                            kRenderTargetWidth,
                                                                            kRenderTargetHeight,
                                                                            kRGBA_8888_GrPixelConfig,
                                                                            nullptr));
     if (!renderTargetContext) {
         SkDebugf("Could not allocate a renderTargetContext");
         return false;
     }

     int fpFactoryCnt = GrFragmentProcessorTestFactory::Count();
     for (int i = 0; i < fpFactoryCnt; ++i) {
         // Since FP factories internally randomize, call each 10 times.
         for (int j = 0; j < 10; ++j) {
             GrProcessorTestData ptd(&random, context, renderTargetContext.get(), proxies);

             GrPaint paint;
             paint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
             auto fp = GrFragmentProcessorTestFactory::MakeIdx(i, &ptd);
             auto blockFP = BlockInputFragmentProcessor::Make(std::move(fp));
             paint.addColorFragmentProcessor(std::move(blockFP));
             GrDrawRandomOp(&random, renderTargetContext.get(), std::move(paint));
             drawingManager->flush(nullptr);
         }
     }

     return true;
 }
 #endif

 static int get_glprograms_max_stages(const sk_gpu_test::ContextInfo& ctxInfo) {
     GrContext* context = ctxInfo.grContext();
     GrGLGpu* gpu = static_cast<GrGLGpu*>(context->getGpu());
     int maxStages = 6;
     if (kGLES_GrGLStandard == gpu->glStandard()) {
     // We've had issues with driver crashes and HW limits being exceeded with many effects on
     // Android devices. We have passes on ARM devices with the default number of stages.
     // TODO When we run ES 3.00 GLSL in more places, test again
 #ifdef SK_BUILD_FOR_ANDROID
         if (kARM_GrGLVendor != gpu->ctxInfo().vendor()) {
             maxStages = 1;
         }
 #endif
     // On iOS we can exceed the maximum number of varyings. http://skbug.com/6627.
 #ifdef SK_BUILD_FOR_IOS
         maxStages = 3;
 #endif
     }
     if (ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D9_ES2_ContextType ||
         ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D11_ES2_ContextType) {
         // On Angle D3D we will hit a limit of out variables if we use too many stages.
         maxStages = 3;
     }
     return maxStages;
 }

 static int get_glprograms_max_levels(const sk_gpu_test::ContextInfo& ctxInfo) {
     // A full tree with 5 levels (31 nodes) may cause a program that exceeds shader limits
     // (e.g. uniform or varying limits); maxTreeLevels should be a number from 1 to 4 inclusive.
     int maxTreeLevels = 4;
     // On iOS we can exceed the maximum number of varyings. http://skbug.com/6627.
 #ifdef SK_BUILD_FOR_IOS
     maxTreeLevels = 2;
 #endif
     if (ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D9_ES2_ContextType ||
         ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D11_ES2_ContextType) {
         // On Angle D3D we will hit a limit of out variables if we use too many stages.
         maxTreeLevels = 2;
     }
     return maxTreeLevels;
 }

 static void test_glprograms(skiatest::Reporter* reporter, const sk_gpu_test::ContextInfo& ctxInfo) {
     int maxStages = get_glprograms_max_stages(ctxInfo);
     if (maxStages == 0) {
         return;
     }
     int maxLevels = get_glprograms_max_levels(ctxInfo);
     if (maxLevels == 0) {
         return;
     }

     // Disable this test on ANGLE D3D9 configurations. We keep hitting a D3D compiler bug.
     // See skbug.com/6842 and anglebug.com/2098
     if (sk_gpu_test::GrContextFactory::kANGLE_D3D9_ES2_ContextType == ctxInfo.type()) {
         return;
     }

     REPORTER_ASSERT(reporter, GrDrawingManager::ProgramUnitTest(ctxInfo.grContext(), maxStages,
                                                                 maxLevels));
 }

 DEF_GPUTEST(GLPrograms, reporter, /*factory*/) {
     // Set a locale that would cause shader compilation to fail because of , as decimal separator.
     // skbug 3330
 #ifdef SK_BUILD_FOR_WIN
     GrAutoLocaleSetter als("sv-SE");
 #else
     GrAutoLocaleSetter als("sv_SE.UTF-8");
 #endif

     // We suppress prints to avoid spew
     GrContextOptions opts;
     opts.fSuppressPrints = true;
     sk_gpu_test::GrContextFactory debugFactory(opts);
     skiatest::RunWithGPUTestContexts(test_glprograms, &skiatest::IsRenderingGLContextType, reporter,
                                      &debugFactory);
 }

 #endif
	/*
	* Copyright 2011 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	// This is a GPU-backend specific test. It relies on static intializers to work

	#include "SkTypes.h"

	#if SK_SUPPORT_GPU && SK_ALLOW_STATIC_GLOBAL_INITIALIZERS

	#include "GrAutoLocaleSetter.h"
	#include "GrContextFactory.h"
	#include "GrContextPriv.h"
	#include "GrDrawOpTest.h"
	#include "GrDrawingManager.h"
	#include "GrPipeline.h"
	#include "GrRenderTargetContextPriv.h"
	#include "GrTest.h"
	#include "GrXferProcessor.h"
	#include "SkChecksum.h"
	#include "SkRandom.h"
	#include "Test.h"

	#include "ops/GrDrawOp.h"

	#include "effects/GrConfigConversionEffect.h"
	#include "effects/GrPorterDuffXferProcessor.h"
	#include "effects/GrXfermodeFragmentProcessor.h"

	#include "gl/GrGLGpu.h"
	#include "glsl/GrGLSLFragmentProcessor.h"
	#include "glsl/GrGLSLFragmentShaderBuilder.h"
	#include "glsl/GrGLSLProgramBuilder.h"

	/*
	* A dummy processor which just tries to insert a massive key and verify that it can retrieve the
	* whole thing correctly
	*/
	static const uint32_t kMaxKeySize = 1024;

	class GLBigKeyProcessor : public GrGLSLFragmentProcessor {
	public:
	void emitCode(EmitArgs& args) override {
	// pass through
	GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
	if (args.fInputColor) {
	fragBuilder->codeAppendf("%s = %s;\n", args.fOutputColor, args.fInputColor);
	} else {
	fragBuilder->codeAppendf("%s = vec4(1.0);\n", args.fOutputColor);
	}
	}

	static void GenKey(const GrProcessor&, const GrShaderCaps&, GrProcessorKeyBuilder* b) {
	for (uint32_t i = 0; i < kMaxKeySize; i++) {
	b->add32(i);
	}
	}

	private:
	typedef GrGLSLFragmentProcessor INHERITED;
	};

	class BigKeyProcessor : public GrFragmentProcessor {
	public:
	static std::unique_ptr<GrFragmentProcessor> Make() {
	return std::unique_ptr<GrFragmentProcessor>(new BigKeyProcessor);
	}

	const char* name() const override { return "Big Ole Key"; }

	GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
	return new GLBigKeyProcessor;
	}

	std::unique_ptr<GrFragmentProcessor> clone() const override { return Make(); }

	private:
	BigKeyProcessor() : INHERITED(kNone_OptimizationFlags) { this->initClassID<BigKeyProcessor>(); }
	virtual void onGetGLSLProcessorKey(const GrShaderCaps& caps,
	GrProcessorKeyBuilder* b) const override {
	GLBigKeyProcessor::GenKey(*this, caps, b);
	}
	bool onIsEqual(const GrFragmentProcessor&) const override { return true; }

	GR_DECLARE_FRAGMENT_PROCESSOR_TEST

	typedef GrFragmentProcessor INHERITED;
	};

	GR_DEFINE_FRAGMENT_PROCESSOR_TEST(BigKeyProcessor);

	#if GR_TEST_UTILS
	std::unique_ptr<GrFragmentProcessor> BigKeyProcessor::TestCreate(GrProcessorTestData*) {
	return BigKeyProcessor::Make();
	}
	#endif

	//////////////////////////////////////////////////////////////////////////////

	class BlockInputFragmentProcessor : public GrFragmentProcessor {
	public:
	static std::unique_ptr<GrFragmentProcessor> Make(std::unique_ptr<GrFragmentProcessor> fp) {
	return std::unique_ptr<GrFragmentProcessor>(new BlockInputFragmentProcessor(std::move(fp)));
	}

	const char* name() const override { return "Block Input"; }

	GrGLSLFragmentProcessor* onCreateGLSLInstance() const override { return new GLFP; }

	std::unique_ptr<GrFragmentProcessor> clone() const override {
	return Make(this->childProcessor(0).clone());
	}

	private:
	class GLFP : public GrGLSLFragmentProcessor {
	public:
	void emitCode(EmitArgs& args) override {
	this->emitChild(0, args);
	}

	private:
	typedef GrGLSLFragmentProcessor INHERITED;
	};

	BlockInputFragmentProcessor(std::unique_ptr<GrFragmentProcessor> child)
	: INHERITED(kNone_OptimizationFlags) {
	this->initClassID<BlockInputFragmentProcessor>();
	this->registerChildProcessor(std::move(child));
	}

	void onGetGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const override {}

	bool onIsEqual(const GrFragmentProcessor&) const override { return true; }

	typedef GrFragmentProcessor INHERITED;
	};

	//////////////////////////////////////////////////////////////////////////////

	/*
	* Begin test code
	*/
	static const int kRenderTargetHeight = 1;
	static const int kRenderTargetWidth = 1;

	static sk_sp<GrRenderTargetContext> random_render_target_context(GrContext* context,
	SkRandom* random,
	const GrCaps* caps) {
	GrSurfaceOrigin origin = random->nextBool() ? kTopLeft_GrSurfaceOrigin
	: kBottomLeft_GrSurfaceOrigin;
	int sampleCnt = random->nextBool() ? caps->getSampleCount(4, kRGBA_8888_GrPixelConfig) : 0;

	sk_sp<GrRenderTargetContext> renderTargetContext(context->makeDeferredRenderTargetContext(
	SkBackingFit::kExact,
	kRenderTargetWidth,
	kRenderTargetHeight,
	kRGBA_8888_GrPixelConfig,
	nullptr,
	sampleCnt,
	origin));
	return renderTargetContext;
	}

	#if GR_TEST_UTILS
	static void set_random_xpf(GrPaint* paint, GrProcessorTestData* d) {
	paint->setXPFactory(GrXPFactoryTestFactory::Get(d));
	}

	static std::unique_ptr<GrFragmentProcessor> create_random_proc_tree(GrProcessorTestData* d,
	int minLevels, int maxLevels) {
	SkASSERT(1 <= minLevels);
	SkASSERT(minLevels <= maxLevels);

	// Return a leaf node if maxLevels is 1 or if we randomly chose to terminate.
	// If returning a leaf node, make sure that it doesn't have children (e.g. another
	// GrComposeEffect)
	const float terminateProbability = 0.3f;
	if (1 == minLevels) {
	bool terminate = (1 == maxLevels) \|\| (d->fRandom->nextF() < terminateProbability);
	if (terminate) {
	std::unique_ptr<GrFragmentProcessor> fp;
	while (true) {
	fp = GrFragmentProcessorTestFactory::Make(d);
	SkASSERT(fp);
	if (0 == fp->numChildProcessors()) {
	break;
	}
	}
	return fp;
	}
	}
	// If we didn't terminate, choose either the left or right subtree to fulfill
	// the minLevels requirement of this tree; the other child can have as few levels as it wants.
	// Also choose a random xfer mode.
	if (minLevels > 1) {
	--minLevels;
	}
	auto minLevelsChild = create_random_proc_tree(d, minLevels, maxLevels - 1);
	std::unique_ptr<GrFragmentProcessor> otherChild(create_random_proc_tree(d, 1, maxLevels - 1));
	SkBlendMode mode = static_cast<SkBlendMode>(d->fRandom->nextRangeU(0,
	(int)SkBlendMode::kLastMode));
	std::unique_ptr<GrFragmentProcessor> fp;
	if (d->fRandom->nextF() < 0.5f) {
	fp = GrXfermodeFragmentProcessor::MakeFromTwoProcessors(std::move(minLevelsChild),
	std::move(otherChild), mode);
	SkASSERT(fp);
	} else {
	fp = GrXfermodeFragmentProcessor::MakeFromTwoProcessors(std::move(otherChild),
	std::move(minLevelsChild), mode);
	SkASSERT(fp);
	}
	return fp;
	}

	static void set_random_color_coverage_stages(GrPaint* paint,
	GrProcessorTestData* d,
	int maxStages,
	int maxTreeLevels) {
	// Randomly choose to either create a linear pipeline of procs or create one proc tree
	const float procTreeProbability = 0.5f;
	if (d->fRandom->nextF() < procTreeProbability) {
	std::unique_ptr<GrFragmentProcessor> fp(create_random_proc_tree(d, 2, maxTreeLevels));
	if (fp) {
	paint->addColorFragmentProcessor(std::move(fp));
	}
	} else {
	int numProcs = d->fRandom->nextULessThan(maxStages + 1);
	int numColorProcs = d->fRandom->nextULessThan(numProcs + 1);

	for (int s = 0; s < numProcs;) {
	std::unique_ptr<GrFragmentProcessor> fp(GrFragmentProcessorTestFactory::Make(d));
	SkASSERT(fp);

	// finally add the stage to the correct pipeline in the drawstate
	if (s < numColorProcs) {
	paint->addColorFragmentProcessor(std::move(fp));
	} else {
	paint->addCoverageFragmentProcessor(std::move(fp));
	}
	++s;
	}
	}
	}

	static void set_random_state(GrPaint* paint, SkRandom* random) {
	if (random->nextBool()) {
	paint->setDisableOutputConversionToSRGB(true);
	}
	if (random->nextBool()) {
	paint->setAllowSRGBInputs(true);
	}
	}

	#endif

	#if !GR_TEST_UTILS
	bool GrDrawingManager::ProgramUnitTest(GrContext*, int) { return true; }
	#else
	bool GrDrawingManager::ProgramUnitTest(GrContext* context, int maxStages, int maxLevels) {
	GrDrawingManager* drawingManager = context->contextPriv().drawingManager();

	sk_sp<GrTextureProxy> proxies[2];

	// setup dummy textures
	GrSurfaceDesc dummyDesc;
	dummyDesc.fFlags = kRenderTarget_GrSurfaceFlag;
	dummyDesc.fOrigin = kBottomLeft_GrSurfaceOrigin;
	dummyDesc.fWidth = 34;
	dummyDesc.fHeight = 18;
	dummyDesc.fConfig = kRGBA_8888_GrPixelConfig;
	proxies[0] = GrSurfaceProxy::MakeDeferred(context->resourceProvider(),
	dummyDesc, SkBudgeted::kNo, nullptr, 0);
	dummyDesc.fFlags = kNone_GrSurfaceFlags;
	dummyDesc.fOrigin = kTopLeft_GrSurfaceOrigin;
	dummyDesc.fWidth = 16;
	dummyDesc.fHeight = 22;
	dummyDesc.fConfig = kAlpha_8_GrPixelConfig;
	proxies[1] = GrSurfaceProxy::MakeDeferred(context->resourceProvider(),
	dummyDesc, SkBudgeted::kNo, nullptr, 0);

	if (!proxies[0] \|\| !proxies[1]) {
	SkDebugf("Could not allocate dummy textures");
	return false;
	}

	// dummy scissor state
	GrScissorState scissor;

	SkRandom random;
	static const int NUM_TESTS = 1024;
	for (int t = 0; t < NUM_TESTS; t++) {
	// setup random render target(can fail)
	sk_sp<GrRenderTargetContext> renderTargetContext(random_render_target_context(
	context, &random, context->caps()));
	if (!renderTargetContext) {
	SkDebugf("Could not allocate renderTargetContext");
	return false;
	}

	GrPaint paint;
	GrProcessorTestData ptd(&random, context, renderTargetContext.get(), proxies);
	set_random_color_coverage_stages(&paint, &ptd, maxStages, maxLevels);
	set_random_xpf(&paint, &ptd);
	set_random_state(&paint, &random);
	GrDrawRandomOp(&random, renderTargetContext.get(), std::move(paint));
	}
	// Flush everything, test passes if flush is successful(ie, no asserts are hit, no crashes)
	drawingManager->flush(nullptr);

	// Validate that GrFPs work correctly without an input.
	sk_sp<GrRenderTargetContext> renderTargetContext(context->makeDeferredRenderTargetContext(
	SkBackingFit::kExact,
	kRenderTargetWidth,
	kRenderTargetHeight,
	kRGBA_8888_GrPixelConfig,
	nullptr));
	if (!renderTargetContext) {
	SkDebugf("Could not allocate a renderTargetContext");
	return false;
	}

	int fpFactoryCnt = GrFragmentProcessorTestFactory::Count();
	for (int i = 0; i < fpFactoryCnt; ++i) {
	// Since FP factories internally randomize, call each 10 times.
	for (int j = 0; j < 10; ++j) {
	GrProcessorTestData ptd(&random, context, renderTargetContext.get(), proxies);

	GrPaint paint;
	paint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
	auto fp = GrFragmentProcessorTestFactory::MakeIdx(i, &ptd);
	auto blockFP = BlockInputFragmentProcessor::Make(std::move(fp));
	paint.addColorFragmentProcessor(std::move(blockFP));
	GrDrawRandomOp(&random, renderTargetContext.get(), std::move(paint));
	drawingManager->flush(nullptr);
	}
	}

	return true;
	}
	#endif

	static int get_glprograms_max_stages(const sk_gpu_test::ContextInfo& ctxInfo) {
	GrContext* context = ctxInfo.grContext();
	GrGLGpu* gpu = static_cast<GrGLGpu*>(context->getGpu());
	int maxStages = 6;
	if (kGLES_GrGLStandard == gpu->glStandard()) {
	// We've had issues with driver crashes and HW limits being exceeded with many effects on
	// Android devices. We have passes on ARM devices with the default number of stages.
	// TODO When we run ES 3.00 GLSL in more places, test again
	#ifdef SK_BUILD_FOR_ANDROID
	if (kARM_GrGLVendor != gpu->ctxInfo().vendor()) {
	maxStages = 1;
	}
	#endif
	// On iOS we can exceed the maximum number of varyings. http://skbug.com/6627.
	#ifdef SK_BUILD_FOR_IOS
	maxStages = 3;
	#endif
	}
	if (ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D9_ES2_ContextType \|\|
	ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D11_ES2_ContextType) {
	// On Angle D3D we will hit a limit of out variables if we use too many stages.
	maxStages = 3;
	}
	return maxStages;
	}

	static int get_glprograms_max_levels(const sk_gpu_test::ContextInfo& ctxInfo) {
	// A full tree with 5 levels (31 nodes) may cause a program that exceeds shader limits
	// (e.g. uniform or varying limits); maxTreeLevels should be a number from 1 to 4 inclusive.
	int maxTreeLevels = 4;
	// On iOS we can exceed the maximum number of varyings. http://skbug.com/6627.
	#ifdef SK_BUILD_FOR_IOS
	maxTreeLevels = 2;
	#endif
	if (ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D9_ES2_ContextType \|\|
	ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D11_ES2_ContextType) {
	// On Angle D3D we will hit a limit of out variables if we use too many stages.
	maxTreeLevels = 2;
	}
	return maxTreeLevels;
	}

	static void test_glprograms(skiatest::Reporter* reporter, const sk_gpu_test::ContextInfo& ctxInfo) {
	int maxStages = get_glprograms_max_stages(ctxInfo);
	if (maxStages == 0) {
	return;
	}
	int maxLevels = get_glprograms_max_levels(ctxInfo);
	if (maxLevels == 0) {
	return;
	}

	// Disable this test on ANGLE D3D9 configurations. We keep hitting a D3D compiler bug.
	// See skbug.com/6842 and anglebug.com/2098
	if (sk_gpu_test::GrContextFactory::kANGLE_D3D9_ES2_ContextType == ctxInfo.type()) {
	return;
	}

	REPORTER_ASSERT(reporter, GrDrawingManager::ProgramUnitTest(ctxInfo.grContext(), maxStages,
	maxLevels));
	}

	DEF_GPUTEST(GLPrograms, reporter, /factory/) {
	// Set a locale that would cause shader compilation to fail because of , as decimal separator.
	// skbug 3330
	#ifdef SK_BUILD_FOR_WIN
	GrAutoLocaleSetter als("sv-SE");
	#else
	GrAutoLocaleSetter als("sv_SE.UTF-8");
	#endif

	// We suppress prints to avoid spew
	GrContextOptions opts;
	opts.fSuppressPrints = true;
	sk_gpu_test::GrContextFactory debugFactory(opts);
	skiatest::RunWithGPUTestContexts(test_glprograms, &skiatest::IsRenderingGLContextType, reporter,
	&debugFactory);
	}

	#endif