third_party/skia/src/gpu/mock/GrMockGpu.cpp - cobalt - Git at Google

 /*
  * Copyright 2017 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/mock/GrMockBuffer.h"
 #include "src/gpu/mock/GrMockCaps.h"
 #include "src/gpu/mock/GrMockGpu.h"
 #include "src/gpu/mock/GrMockOpsRenderPass.h"
 #include "src/gpu/mock/GrMockStencilAttachment.h"
 #include "src/gpu/mock/GrMockTexture.h"
 #include <atomic>

 int GrMockGpu::NextInternalTextureID() {
     static std::atomic<int> nextID{1};
     int id;
     do {
         id = nextID.fetch_add(1);
     } while (0 == id);  // Reserve 0 for an invalid ID.
     return id;
 }

 int GrMockGpu::NextExternalTextureID() {
     // We use negative ints for the "testing only external textures" so they can easily be
     // identified when debugging.
     static std::atomic<int> nextID{-1};
     return nextID--;
 }

 int GrMockGpu::NextInternalRenderTargetID() {
     // We start off with large numbers to differentiate from texture IDs, even though they're
     // technically in a different space.
     static std::atomic<int> nextID{SK_MaxS32};
     return nextID--;
 }

 int GrMockGpu::NextExternalRenderTargetID() {
     // We use large negative ints for the "testing only external render targets" so they can easily
     // be identified when debugging.
     static std::atomic<int> nextID{SK_MinS32};
     return nextID++;
 }

 sk_sp<GrGpu> GrMockGpu::Make(const GrMockOptions* mockOptions,
                              const GrContextOptions& contextOptions, GrContext* context) {
     static const GrMockOptions kDefaultOptions = GrMockOptions();
     if (!mockOptions) {
         mockOptions = &kDefaultOptions;
     }
     return sk_sp<GrGpu>(new GrMockGpu(context, *mockOptions, contextOptions));
 }

 GrOpsRenderPass* GrMockGpu::getOpsRenderPass(
                                 GrRenderTarget* rt, GrSurfaceOrigin origin, const SkIRect& bounds,
                                 const GrOpsRenderPass::LoadAndStoreInfo& colorInfo,
                                 const GrOpsRenderPass::StencilLoadAndStoreInfo&,
                                 const SkTArray<GrSurfaceProxy*, true>& sampledProxies) {
     return new GrMockOpsRenderPass(this, rt, origin, colorInfo);
 }

 void GrMockGpu::submit(GrOpsRenderPass* renderPass) {
     for (int i = 0; i < static_cast<GrMockOpsRenderPass*>(renderPass)->numDraws(); ++i) {
         fStats.incNumDraws();
     }
     delete renderPass;
 }

 GrMockGpu::GrMockGpu(GrContext* context, const GrMockOptions& options,
                      const GrContextOptions& contextOptions)
         : INHERITED(context)
         , fMockOptions(options) {
     fCaps.reset(new GrMockCaps(contextOptions, options));
 }

 void GrMockGpu::querySampleLocations(GrRenderTarget* rt, SkTArray<SkPoint>* sampleLocations) {
     sampleLocations->reset();
     int numRemainingSamples = rt->numSamples();
     while (numRemainingSamples > 0) {
         // Use standard D3D sample locations.
         switch (numRemainingSamples) {
             case 0:
             case 1:
                 sampleLocations->push_back().set(.5, .5);
                 break;
             case 2:
                 sampleLocations->push_back().set(.75, .75);
                 sampleLocations->push_back().set(.25, .25);
                 break;
             case 3:
             case 4:
                 sampleLocations->push_back().set(.375, .125);
                 sampleLocations->push_back().set(.875, .375);
                 sampleLocations->push_back().set(.125, .625);
                 sampleLocations->push_back().set(.625, .875);
                 break;
             case 5:
             case 6:
             case 7:
             case 8:
                 sampleLocations->push_back().set(.5625, .3125);
                 sampleLocations->push_back().set(.4375, .6875);
                 sampleLocations->push_back().set(.8125, .5625);
                 sampleLocations->push_back().set(.3125, .1875);
                 sampleLocations->push_back().set(.1875, .8125);
                 sampleLocations->push_back().set(.0625, .4375);
                 sampleLocations->push_back().set(.6875, .4375);
                 sampleLocations->push_back().set(.4375, .0625);
                 break;
             default:
                 sampleLocations->push_back().set(.5625, .5625);
                 sampleLocations->push_back().set(.4375, .3125);
                 sampleLocations->push_back().set(.3125, .6250);
                 sampleLocations->push_back().set(.2500, .4375);
                 sampleLocations->push_back().set(.1875, .3750);
                 sampleLocations->push_back().set(.6250, .8125);
                 sampleLocations->push_back().set(.8125, .6875);
                 sampleLocations->push_back().set(.6875, .1875);
                 sampleLocations->push_back().set(.3750, .8750);
                 sampleLocations->push_back().set(.5000, .0625);
                 sampleLocations->push_back().set(.2500, .1250);
                 sampleLocations->push_back().set(.1250, .2500);
                 sampleLocations->push_back().set(.0000, .5000);
                 sampleLocations->push_back().set(.4375, .2500);
                 sampleLocations->push_back().set(.8750, .4375);
                 sampleLocations->push_back().set(.0625, .0000);
                 break;
         }
         numRemainingSamples = rt->numSamples() - sampleLocations->count();
     }
 }

 sk_sp<GrTexture> GrMockGpu::onCreateTexture(const GrSurfaceDesc& desc,
                                             const GrBackendFormat& format,
                                             GrRenderable renderable,
                                             int renderTargetSampleCnt,
                                             SkBudgeted budgeted,
                                             GrProtected isProtected,
                                             int mipLevelCount,
                                             uint32_t levelClearMask) {
     if (fMockOptions.fFailTextureAllocations) {
         return nullptr;
     }

     GrColorType ct = format.asMockColorType();
     SkASSERT(ct != GrColorType::kUnknown);

     GrMipMapsStatus mipMapsStatus =
             mipLevelCount > 1 ? GrMipMapsStatus::kDirty : GrMipMapsStatus::kNotAllocated;
     GrMockTextureInfo texInfo(ct, NextInternalTextureID());
     if (renderable == GrRenderable::kYes) {
         GrMockRenderTargetInfo rtInfo(ct, NextInternalRenderTargetID());
         return sk_sp<GrTexture>(new GrMockTextureRenderTarget(this, budgeted, desc,
                                                               renderTargetSampleCnt, isProtected,
                                                               mipMapsStatus, texInfo, rtInfo));
     }
     return sk_sp<GrTexture>(
             new GrMockTexture(this, budgeted, desc, isProtected, mipMapsStatus, texInfo));
 }

 sk_sp<GrTexture> GrMockGpu::onCreateCompressedTexture(int width, int height, const GrBackendFormat&,
                                                       SkImage::CompressionType compressionType,
                                                       SkBudgeted budgeted, const void* data) {
     return nullptr;
 }

 sk_sp<GrTexture> GrMockGpu::onWrapBackendTexture(const GrBackendTexture& tex, GrColorType colorType,
                                                  GrWrapOwnership ownership,
                                                  GrWrapCacheable wrapType, GrIOType ioType) {
     GrMockTextureInfo texInfo;
     SkAssertResult(tex.getMockTextureInfo(&texInfo));

     SkASSERT(colorType == texInfo.fColorType);
     GrSurfaceDesc desc;
     desc.fWidth = tex.width();
     desc.fHeight = tex.height();
     desc.fConfig = texInfo.pixelConfig();

     GrMipMapsStatus mipMapsStatus = tex.hasMipMaps() ? GrMipMapsStatus::kValid
                                                      : GrMipMapsStatus::kNotAllocated;
     auto isProtected = GrProtected(tex.isProtected());
     return sk_sp<GrTexture>(
             new GrMockTexture(this, desc, isProtected, mipMapsStatus, texInfo, wrapType, ioType));
 }

 sk_sp<GrTexture> GrMockGpu::onWrapRenderableBackendTexture(const GrBackendTexture& tex,
                                                            int sampleCnt,
                                                            GrColorType colorType,
                                                            GrWrapOwnership ownership,
                                                            GrWrapCacheable cacheable) {
     GrMockTextureInfo texInfo;
     SkAssertResult(tex.getMockTextureInfo(&texInfo));

     SkASSERT(colorType == texInfo.fColorType);
     GrSurfaceDesc desc;
     desc.fWidth = tex.width();
     desc.fHeight = tex.height();
     desc.fConfig = texInfo.pixelConfig();

     GrMipMapsStatus mipMapsStatus =
             tex.hasMipMaps() ? GrMipMapsStatus::kValid : GrMipMapsStatus::kNotAllocated;

     // The client gave us the texture ID but we supply the render target ID.
     GrMockRenderTargetInfo rtInfo(texInfo.fColorType, NextInternalRenderTargetID());

     auto isProtected = GrProtected(tex.isProtected());
     return sk_sp<GrTexture>(new GrMockTextureRenderTarget(
             this, desc, sampleCnt, isProtected, mipMapsStatus, texInfo, rtInfo, cacheable));
 }

 sk_sp<GrRenderTarget> GrMockGpu::onWrapBackendRenderTarget(const GrBackendRenderTarget& rt,
                                                            GrColorType colorType) {
     GrMockRenderTargetInfo info;
     SkAssertResult(rt.getMockRenderTargetInfo(&info));

     SkASSERT(colorType == info.colorType());
     GrSurfaceDesc desc;
     desc.fWidth = rt.width();
     desc.fHeight = rt.height();
     desc.fConfig = info.pixelConfig();

     auto isProtected = GrProtected(rt.isProtected());
     return sk_sp<GrRenderTarget>(new GrMockRenderTarget(this, GrMockRenderTarget::kWrapped, desc,
                                                         rt.sampleCnt(), isProtected, info));
 }

 sk_sp<GrRenderTarget> GrMockGpu::onWrapBackendTextureAsRenderTarget(const GrBackendTexture& tex,
                                                                     int sampleCnt,
                                                                     GrColorType colorType) {
     GrMockTextureInfo texInfo;
     SkAssertResult(tex.getMockTextureInfo(&texInfo));

     SkASSERT(colorType == texInfo.fColorType);
     GrSurfaceDesc desc;
     desc.fWidth = tex.width();
     desc.fHeight = tex.height();
     desc.fConfig = texInfo.pixelConfig();

     // The client gave us the texture ID but we supply the render target ID.
     GrMockRenderTargetInfo rtInfo(texInfo.fColorType, NextInternalRenderTargetID());

     auto isProtected = GrProtected(tex.isProtected());
     return sk_sp<GrRenderTarget>(new GrMockRenderTarget(this, GrMockRenderTarget::kWrapped, desc,
                                                         sampleCnt, isProtected, rtInfo));
 }

 sk_sp<GrGpuBuffer> GrMockGpu::onCreateBuffer(size_t sizeInBytes, GrGpuBufferType type,
                                              GrAccessPattern accessPattern, const void*) {
     return sk_sp<GrGpuBuffer>(new GrMockBuffer(this, sizeInBytes, type, accessPattern));
 }

 GrStencilAttachment* GrMockGpu::createStencilAttachmentForRenderTarget(
         const GrRenderTarget* rt, int width, int height, int numStencilSamples) {
     SkASSERT(numStencilSamples == rt->numSamples());
     static constexpr int kBits = 8;
     fStats.incStencilAttachmentCreates();
     return new GrMockStencilAttachment(this, width, height, kBits, rt->numSamples());
 }

 GrBackendTexture GrMockGpu::onCreateBackendTexture(SkISize dimensions,
                                                    const GrBackendFormat& format,
                                                    GrRenderable,
                                                    const BackendTextureData*,
                                                    int numMipLevels,
                                                    GrProtected) {
     auto colorType = format.asMockColorType();
     if (!this->caps()->isFormatTexturable(format)) {
         return GrBackendTexture();  // invalid
     }

     GrMockTextureInfo info(colorType, NextExternalTextureID());

     fOutstandingTestingOnlyTextureIDs.add(info.fID);
     auto mipMapped = numMipLevels > 1 ? GrMipMapped::kYes : GrMipMapped::kNo;
     return GrBackendTexture(dimensions.width(), dimensions.height(), mipMapped, info);
 }

 void GrMockGpu::deleteBackendTexture(const GrBackendTexture& tex) {
     SkASSERT(GrBackendApi::kMock == tex.backend());

     GrMockTextureInfo info;
     if (tex.getMockTextureInfo(&info)) {
         fOutstandingTestingOnlyTextureIDs.remove(info.fID);
     }
 }

 #if GR_TEST_UTILS
 bool GrMockGpu::isTestingOnlyBackendTexture(const GrBackendTexture& tex) const {
     SkASSERT(GrBackendApi::kMock == tex.backend());

     GrMockTextureInfo info;
     if (!tex.getMockTextureInfo(&info)) {
         return false;
     }

     return fOutstandingTestingOnlyTextureIDs.contains(info.fID);
 }

 GrBackendRenderTarget GrMockGpu::createTestingOnlyBackendRenderTarget(int w, int h,
                                                                       GrColorType colorType) {
     GrMockRenderTargetInfo info(colorType, NextExternalRenderTargetID());
     static constexpr int kSampleCnt = 1;
     static constexpr int kStencilBits = 8;
     return GrBackendRenderTarget(w, h, kSampleCnt, kStencilBits, info);
 }

 void GrMockGpu::deleteTestingOnlyBackendRenderTarget(const GrBackendRenderTarget&) {}
 #endif
	/*
	* Copyright 2017 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/mock/GrMockBuffer.h"
	#include "src/gpu/mock/GrMockCaps.h"
	#include "src/gpu/mock/GrMockGpu.h"
	#include "src/gpu/mock/GrMockOpsRenderPass.h"
	#include "src/gpu/mock/GrMockStencilAttachment.h"
	#include "src/gpu/mock/GrMockTexture.h"
	#include <atomic>

	int GrMockGpu::NextInternalTextureID() {
	static std::atomic<int> nextID{1};
	int id;
	do {
	id = nextID.fetch_add(1);
	} while (0 == id); // Reserve 0 for an invalid ID.
	return id;
	}

	int GrMockGpu::NextExternalTextureID() {
	// We use negative ints for the "testing only external textures" so they can easily be
	// identified when debugging.
	static std::atomic<int> nextID{-1};
	return nextID--;
	}

	int GrMockGpu::NextInternalRenderTargetID() {
	// We start off with large numbers to differentiate from texture IDs, even though they're
	// technically in a different space.
	static std::atomic<int> nextID{SK_MaxS32};
	return nextID--;
	}

	int GrMockGpu::NextExternalRenderTargetID() {
	// We use large negative ints for the "testing only external render targets" so they can easily
	// be identified when debugging.
	static std::atomic<int> nextID{SK_MinS32};
	return nextID++;
	}

	sk_sp<GrGpu> GrMockGpu::Make(const GrMockOptions* mockOptions,
	const GrContextOptions& contextOptions, GrContext* context) {
	static const GrMockOptions kDefaultOptions = GrMockOptions();
	if (!mockOptions) {
	mockOptions = &kDefaultOptions;
	}
	return sk_sp<GrGpu>(new GrMockGpu(context, *mockOptions, contextOptions));
	}

	GrOpsRenderPass* GrMockGpu::getOpsRenderPass(
	GrRenderTarget* rt, GrSurfaceOrigin origin, const SkIRect& bounds,
	const GrOpsRenderPass::LoadAndStoreInfo& colorInfo,
	const GrOpsRenderPass::StencilLoadAndStoreInfo&,
	const SkTArray<GrSurfaceProxy*, true>& sampledProxies) {
	return new GrMockOpsRenderPass(this, rt, origin, colorInfo);
	}

	void GrMockGpu::submit(GrOpsRenderPass* renderPass) {
	for (int i = 0; i < static_cast<GrMockOpsRenderPass*>(renderPass)->numDraws(); ++i) {
	fStats.incNumDraws();
	}
	delete renderPass;
	}

	GrMockGpu::GrMockGpu(GrContext* context, const GrMockOptions& options,
	const GrContextOptions& contextOptions)
	: INHERITED(context)
	, fMockOptions(options) {
	fCaps.reset(new GrMockCaps(contextOptions, options));
	}

	void GrMockGpu::querySampleLocations(GrRenderTarget* rt, SkTArray<SkPoint>* sampleLocations) {
	sampleLocations->reset();
	int numRemainingSamples = rt->numSamples();
	while (numRemainingSamples > 0) {
	// Use standard D3D sample locations.
	switch (numRemainingSamples) {
	case 0:
	case 1:
	sampleLocations->push_back().set(.5, .5);
	break;
	case 2:
	sampleLocations->push_back().set(.75, .75);
	sampleLocations->push_back().set(.25, .25);
	break;
	case 3:
	case 4:
	sampleLocations->push_back().set(.375, .125);
	sampleLocations->push_back().set(.875, .375);
	sampleLocations->push_back().set(.125, .625);
	sampleLocations->push_back().set(.625, .875);
	break;
	case 5:
	case 6:
	case 7:
	case 8:
	sampleLocations->push_back().set(.5625, .3125);
	sampleLocations->push_back().set(.4375, .6875);
	sampleLocations->push_back().set(.8125, .5625);
	sampleLocations->push_back().set(.3125, .1875);
	sampleLocations->push_back().set(.1875, .8125);
	sampleLocations->push_back().set(.0625, .4375);
	sampleLocations->push_back().set(.6875, .4375);
	sampleLocations->push_back().set(.4375, .0625);
	break;
	default:
	sampleLocations->push_back().set(.5625, .5625);
	sampleLocations->push_back().set(.4375, .3125);
	sampleLocations->push_back().set(.3125, .6250);
	sampleLocations->push_back().set(.2500, .4375);
	sampleLocations->push_back().set(.1875, .3750);
	sampleLocations->push_back().set(.6250, .8125);
	sampleLocations->push_back().set(.8125, .6875);
	sampleLocations->push_back().set(.6875, .1875);
	sampleLocations->push_back().set(.3750, .8750);
	sampleLocations->push_back().set(.5000, .0625);
	sampleLocations->push_back().set(.2500, .1250);
	sampleLocations->push_back().set(.1250, .2500);
	sampleLocations->push_back().set(.0000, .5000);
	sampleLocations->push_back().set(.4375, .2500);
	sampleLocations->push_back().set(.8750, .4375);
	sampleLocations->push_back().set(.0625, .0000);
	break;
	}
	numRemainingSamples = rt->numSamples() - sampleLocations->count();
	}
	}

	sk_sp<GrTexture> GrMockGpu::onCreateTexture(const GrSurfaceDesc& desc,
	const GrBackendFormat& format,
	GrRenderable renderable,
	int renderTargetSampleCnt,
	SkBudgeted budgeted,
	GrProtected isProtected,
	int mipLevelCount,
	uint32_t levelClearMask) {
	if (fMockOptions.fFailTextureAllocations) {
	return nullptr;
	}

	GrColorType ct = format.asMockColorType();
	SkASSERT(ct != GrColorType::kUnknown);

	GrMipMapsStatus mipMapsStatus =
	mipLevelCount > 1 ? GrMipMapsStatus::kDirty : GrMipMapsStatus::kNotAllocated;
	GrMockTextureInfo texInfo(ct, NextInternalTextureID());
	if (renderable == GrRenderable::kYes) {
	GrMockRenderTargetInfo rtInfo(ct, NextInternalRenderTargetID());
	return sk_sp<GrTexture>(new GrMockTextureRenderTarget(this, budgeted, desc,
	renderTargetSampleCnt, isProtected,
	mipMapsStatus, texInfo, rtInfo));
	}
	return sk_sp<GrTexture>(
	new GrMockTexture(this, budgeted, desc, isProtected, mipMapsStatus, texInfo));
	}

	sk_sp<GrTexture> GrMockGpu::onCreateCompressedTexture(int width, int height, const GrBackendFormat&,
	SkImage::CompressionType compressionType,
	SkBudgeted budgeted, const void* data) {
	return nullptr;
	}

	sk_sp<GrTexture> GrMockGpu::onWrapBackendTexture(const GrBackendTexture& tex, GrColorType colorType,
	GrWrapOwnership ownership,
	GrWrapCacheable wrapType, GrIOType ioType) {
	GrMockTextureInfo texInfo;
	SkAssertResult(tex.getMockTextureInfo(&texInfo));

	SkASSERT(colorType == texInfo.fColorType);
	GrSurfaceDesc desc;
	desc.fWidth = tex.width();
	desc.fHeight = tex.height();
	desc.fConfig = texInfo.pixelConfig();

	GrMipMapsStatus mipMapsStatus = tex.hasMipMaps() ? GrMipMapsStatus::kValid
	: GrMipMapsStatus::kNotAllocated;
	auto isProtected = GrProtected(tex.isProtected());
	return sk_sp<GrTexture>(
	new GrMockTexture(this, desc, isProtected, mipMapsStatus, texInfo, wrapType, ioType));
	}

	sk_sp<GrTexture> GrMockGpu::onWrapRenderableBackendTexture(const GrBackendTexture& tex,
	int sampleCnt,
	GrColorType colorType,
	GrWrapOwnership ownership,
	GrWrapCacheable cacheable) {
	GrMockTextureInfo texInfo;
	SkAssertResult(tex.getMockTextureInfo(&texInfo));

	SkASSERT(colorType == texInfo.fColorType);
	GrSurfaceDesc desc;
	desc.fWidth = tex.width();
	desc.fHeight = tex.height();
	desc.fConfig = texInfo.pixelConfig();

	GrMipMapsStatus mipMapsStatus =
	tex.hasMipMaps() ? GrMipMapsStatus::kValid : GrMipMapsStatus::kNotAllocated;

	// The client gave us the texture ID but we supply the render target ID.
	GrMockRenderTargetInfo rtInfo(texInfo.fColorType, NextInternalRenderTargetID());

	auto isProtected = GrProtected(tex.isProtected());
	return sk_sp<GrTexture>(new GrMockTextureRenderTarget(
	this, desc, sampleCnt, isProtected, mipMapsStatus, texInfo, rtInfo, cacheable));
	}

	sk_sp<GrRenderTarget> GrMockGpu::onWrapBackendRenderTarget(const GrBackendRenderTarget& rt,
	GrColorType colorType) {
	GrMockRenderTargetInfo info;
	SkAssertResult(rt.getMockRenderTargetInfo(&info));

	SkASSERT(colorType == info.colorType());
	GrSurfaceDesc desc;
	desc.fWidth = rt.width();
	desc.fHeight = rt.height();
	desc.fConfig = info.pixelConfig();

	auto isProtected = GrProtected(rt.isProtected());
	return sk_sp<GrRenderTarget>(new GrMockRenderTarget(this, GrMockRenderTarget::kWrapped, desc,
	rt.sampleCnt(), isProtected, info));
	}

	sk_sp<GrRenderTarget> GrMockGpu::onWrapBackendTextureAsRenderTarget(const GrBackendTexture& tex,
	int sampleCnt,
	GrColorType colorType) {
	GrMockTextureInfo texInfo;
	SkAssertResult(tex.getMockTextureInfo(&texInfo));

	SkASSERT(colorType == texInfo.fColorType);
	GrSurfaceDesc desc;
	desc.fWidth = tex.width();
	desc.fHeight = tex.height();
	desc.fConfig = texInfo.pixelConfig();

	// The client gave us the texture ID but we supply the render target ID.
	GrMockRenderTargetInfo rtInfo(texInfo.fColorType, NextInternalRenderTargetID());

	auto isProtected = GrProtected(tex.isProtected());
	return sk_sp<GrRenderTarget>(new GrMockRenderTarget(this, GrMockRenderTarget::kWrapped, desc,
	sampleCnt, isProtected, rtInfo));
	}

	sk_sp<GrGpuBuffer> GrMockGpu::onCreateBuffer(size_t sizeInBytes, GrGpuBufferType type,
	GrAccessPattern accessPattern, const void*) {
	return sk_sp<GrGpuBuffer>(new GrMockBuffer(this, sizeInBytes, type, accessPattern));
	}

	GrStencilAttachment* GrMockGpu::createStencilAttachmentForRenderTarget(
	const GrRenderTarget* rt, int width, int height, int numStencilSamples) {
	SkASSERT(numStencilSamples == rt->numSamples());
	static constexpr int kBits = 8;
	fStats.incStencilAttachmentCreates();
	return new GrMockStencilAttachment(this, width, height, kBits, rt->numSamples());
	}

	GrBackendTexture GrMockGpu::onCreateBackendTexture(SkISize dimensions,
	const GrBackendFormat& format,
	GrRenderable,
	const BackendTextureData*,
	int numMipLevels,
	GrProtected) {
	auto colorType = format.asMockColorType();
	if (!this->caps()->isFormatTexturable(format)) {
	return GrBackendTexture(); // invalid
	}

	GrMockTextureInfo info(colorType, NextExternalTextureID());

	fOutstandingTestingOnlyTextureIDs.add(info.fID);
	auto mipMapped = numMipLevels > 1 ? GrMipMapped::kYes : GrMipMapped::kNo;
	return GrBackendTexture(dimensions.width(), dimensions.height(), mipMapped, info);
	}

	void GrMockGpu::deleteBackendTexture(const GrBackendTexture& tex) {
	SkASSERT(GrBackendApi::kMock == tex.backend());

	GrMockTextureInfo info;
	if (tex.getMockTextureInfo(&info)) {
	fOutstandingTestingOnlyTextureIDs.remove(info.fID);
	}
	}

	#if GR_TEST_UTILS
	bool GrMockGpu::isTestingOnlyBackendTexture(const GrBackendTexture& tex) const {
	SkASSERT(GrBackendApi::kMock == tex.backend());

	GrMockTextureInfo info;
	if (!tex.getMockTextureInfo(&info)) {
	return false;
	}

	return fOutstandingTestingOnlyTextureIDs.contains(info.fID);
	}

	GrBackendRenderTarget GrMockGpu::createTestingOnlyBackendRenderTarget(int w, int h,
	GrColorType colorType) {
	GrMockRenderTargetInfo info(colorType, NextExternalRenderTargetID());
	static constexpr int kSampleCnt = 1;
	static constexpr int kStencilBits = 8;
	return GrBackendRenderTarget(w, h, kSampleCnt, kStencilBits, info);
	}

	void GrMockGpu::deleteTestingOnlyBackendRenderTarget(const GrBackendRenderTarget&) {}
	#endif