gm/asyncrescaleandread.cpp - platform/external/skia - Gitiles

 /*
  * Copyright 2019 Google LLC
  *
  * 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/SkCanvas.h"
 #include "include/core/SkColor.h"
 #include "include/core/SkPaint.h"
 #include "include/core/SkRect.h"
 #include "include/core/SkSurface.h"
 #include "include/core/SkYUVAIndex.h"
 #include "include/gpu/GrContext.h"
 #include "src/core/SkAutoPixmapStorage.h"
 #include "src/core/SkConvertPixels.h"
 #include "src/core/SkScopeExit.h"
 #include "src/gpu/GrContextPriv.h"
 #include "tools/Resources.h"
 #include "tools/ToolUtils.h"

 namespace {
 struct AsyncContext {
     bool fCalled = false;
     std::unique_ptr<const SkImage::AsyncReadResult> fResult;
 };
 }  // anonymous namespace

 // Making this a lambda in the test functions caused:
 //   "error: cannot compile this forwarded non-trivially copyable parameter yet"
 // on x86/Win/Clang bot, referring to 'result'.
 static void async_callback(void* c, std::unique_ptr<const SkImage::AsyncReadResult> result) {
     auto context = static_cast<AsyncContext*>(c);
     context->fResult = std::move(result);
     context->fCalled = true;
 };

 // Draws the image to a surface, does a asyncRescaleAndReadPixels of the image, and then sticks
 // the result in a raster image.
 template <typename Src>
 static sk_sp<SkImage> do_read_and_scale(Src* src,
                                         GrContext* context,
                                         const SkIRect& srcRect,
                                         const SkImageInfo& ii,
                                         SkImage::RescaleGamma rescaleGamma,
                                         SkFilterQuality quality) {
     auto* asyncContext = new AsyncContext();
     src->asyncRescaleAndReadPixels(ii, srcRect, rescaleGamma, quality, async_callback,
                                    asyncContext);
     if (context) {
         context->submit();
     }
     while (!asyncContext->fCalled) {
         // Only GPU should actually be asynchronous.
         SkASSERT(context);
         context->checkAsyncWorkCompletion();
     }
     if (!asyncContext->fResult) {
         return nullptr;
     }
     SkPixmap pixmap(ii, asyncContext->fResult->data(0), asyncContext->fResult->rowBytes(0));
     auto releasePixels = [](const void*, void* c) { delete static_cast<AsyncContext*>(c); };
     return SkImage::MakeFromRaster(pixmap, releasePixels, asyncContext);
 }

 template <typename Src>
 static sk_sp<SkImage> do_read_and_scale_yuv(Src* src,
                                             GrContext* context,
                                             SkYUVColorSpace yuvCS,
                                             const SkIRect& srcRect,
                                             SkISize size,
                                             SkImage::RescaleGamma rescaleGamma,
                                             SkFilterQuality quality,
                                             SkScopeExit* cleanup) {
     SkASSERT(!(size.width() & 0b1) && !(size.height() & 0b1));

     SkISize uvSize = {size.width()/2, size.height()/2};
     SkImageInfo yII  = SkImageInfo::Make(size,   kGray_8_SkColorType, kPremul_SkAlphaType);
     SkImageInfo uvII = SkImageInfo::Make(uvSize, kGray_8_SkColorType, kPremul_SkAlphaType);

     AsyncContext asyncContext;
     src->asyncRescaleAndReadPixelsYUV420(yuvCS, SkColorSpace::MakeSRGB(), srcRect, size,
                                          rescaleGamma, quality, async_callback, &asyncContext);
     if (context) {
         context->submit();
     }
     while (!asyncContext.fCalled) {
         // Only GPU should actually be asynchronous.
         SkASSERT(context);
         context->checkAsyncWorkCompletion();
     }
     if (!asyncContext.fResult) {
         return nullptr;
     }
     GrBackendTexture backendTextures[3];

     SkPixmap yPM(yII, asyncContext.fResult->data(0), asyncContext.fResult->rowBytes(0));
     SkPixmap uPM(uvII, asyncContext.fResult->data(1), asyncContext.fResult->rowBytes(1));
     SkPixmap vPM(uvII, asyncContext.fResult->data(2), asyncContext.fResult->rowBytes(2));

     backendTextures[0] = context->createBackendTexture(yPM, GrRenderable::kNo, GrProtected::kNo);
     backendTextures[1] = context->createBackendTexture(uPM, GrRenderable::kNo, GrProtected::kNo);
     backendTextures[2] = context->createBackendTexture(vPM, GrRenderable::kNo, GrProtected::kNo);

     SkYUVAIndex indices[4] = {
         { 0, SkColorChannel::kR},
         { 1, SkColorChannel::kR},
         { 2, SkColorChannel::kR},
         {-1, SkColorChannel::kR}
     };

     *cleanup = {[context, backendTextures] {
         GrFlushInfo flushInfo;
         flushInfo.fFlags = kSyncCpu_GrFlushFlag;
         context->flush(flushInfo);
         context->submit(true);
         context->deleteBackendTexture(backendTextures[0]);
         context->deleteBackendTexture(backendTextures[1]);
         context->deleteBackendTexture(backendTextures[2]);
     }};

     return SkImage::MakeFromYUVATextures(context, yuvCS, backendTextures, indices, size,
                                          kTopLeft_GrSurfaceOrigin, SkColorSpace::MakeSRGB());
 }

 // Draws a grid of rescales. The columns are none, low, and high filter quality. The rows are
 // rescale in src gamma and rescale in linear gamma.
 template <typename Src>
 static skiagm::DrawResult do_rescale_grid(SkCanvas* canvas,
                                           Src* src,
                                           GrContext* context,
                                           const SkIRect& srcRect,
                                           SkISize newSize,
                                           bool doYUV420,
                                           SkString* errorMsg,
                                           int pad = 0) {
     if (doYUV420) {
         if (!canvas->getGrContext() || !canvas->getGrContext()->priv().asDirectContext()) {
             errorMsg->printf("YUV420 only supported on direct GPU for now.");
             return skiagm::DrawResult::kSkip;
         }
     }
     if (canvas->imageInfo().colorType() == kUnknown_SkColorType) {
         *errorMsg = "Not supported on recording/vector backends.";
         return skiagm::DrawResult::kSkip;
     }
     const auto ii = canvas->imageInfo().makeDimensions(newSize);

     SkYUVColorSpace yuvColorSpace = kRec601_SkYUVColorSpace;
     canvas->save();
     for (auto gamma : {SkImage::RescaleGamma::kSrc, SkImage::RescaleGamma::kLinear}) {
         canvas->save();
         for (auto quality : {kNone_SkFilterQuality, kLow_SkFilterQuality, kHigh_SkFilterQuality}) {
             SkScopeExit cleanup;
             sk_sp<SkImage> result;
             if (doYUV420) {
                 result = do_read_and_scale_yuv(src, context, yuvColorSpace, srcRect, newSize, gamma,
                                                quality, &cleanup);
                 if (!result) {
                     errorMsg->printf("YUV420 async call failed. Allowed for now.");
                     return skiagm::DrawResult::kSkip;
                 }
                 int nextCS = static_cast<int>(yuvColorSpace + 1) % (kLastEnum_SkYUVColorSpace + 1);
                 yuvColorSpace = static_cast<SkYUVColorSpace>(nextCS);
             } else {
                 result = do_read_and_scale(src, context, srcRect, ii, gamma, quality);
                 if (!result) {
                     errorMsg->printf("async read call failed.");
                     return skiagm::DrawResult::kFail;
                 }
             }
             canvas->drawImage(result, 0, 0);
             canvas->translate(newSize.width() + pad, 0);
         }
         canvas->restore();
         canvas->translate(0, newSize.height() + pad);
     }
     canvas->restore();
     return skiagm::DrawResult::kOk;
 }

 static skiagm::DrawResult do_rescale_image_grid(SkCanvas* canvas,
                                                 const char* imageFile,
                                                 const SkIRect& srcRect,
                                                 SkISize newSize,
                                                 bool doSurface,
                                                 bool doYUV420,
                                                 SkString* errorMsg) {
     auto image = GetResourceAsImage(imageFile);
     if (!image) {
         errorMsg->printf("Could not load image file %s.", imageFile);
         return skiagm::DrawResult::kFail;
     }
     if (canvas->imageInfo().colorType() == kUnknown_SkColorType) {
         *errorMsg = "Not supported on recording/vector backends.";
         return skiagm::DrawResult::kSkip;
     }
     if (doSurface) {
         // Turn the image into a surface in order to call the read and rescale API
         auto surfInfo = image->imageInfo().makeDimensions(image->dimensions());
         auto surface = canvas->makeSurface(surfInfo);
         if (!surface && surfInfo.colorType() == kBGRA_8888_SkColorType) {
             surfInfo = surfInfo.makeColorType(kRGBA_8888_SkColorType);
             surface = canvas->makeSurface(surfInfo);
         }
         if (!surface) {
             *errorMsg = "Could not create surface for image.";
             // When testing abandoned GrContext we expect surface creation to fail.
             if (canvas->getGrContext() && canvas->getGrContext()->abandoned()) {
                 return skiagm::DrawResult::kSkip;
             }
             return skiagm::DrawResult::kFail;
         }
         SkPaint paint;
         paint.setBlendMode(SkBlendMode::kSrc);
         surface->getCanvas()->drawImage(image, 0, 0, &paint);
         return do_rescale_grid(canvas, surface.get(), canvas->getGrContext(), srcRect, newSize,
                                doYUV420, errorMsg);
     } else if (auto ctx = canvas->getGrContext()) {
         image = image->makeTextureImage(ctx);
         if (!image) {
             *errorMsg = "Could not create image.";
             // When testing abandoned GrContext we expect surface creation to fail.
             if (canvas->getGrContext() && canvas->getGrContext()->abandoned()) {
                 return skiagm::DrawResult::kSkip;
             }
             return skiagm::DrawResult::kFail;
         }
     }
     return do_rescale_grid(canvas, image.get(), canvas->getGrContext(), srcRect, newSize, doYUV420,
                            errorMsg);
 }

 #define DEF_RESCALE_AND_READ_SURF_GM(IMAGE_FILE, TAG, SRC_RECT, W, H)                      \
     DEF_SIMPLE_GM_CAN_FAIL(async_rescale_and_read_##TAG, canvas, errorMsg, 3 * W, 2 * H) { \
         ToolUtils::draw_checkerboard(canvas, SK_ColorDKGRAY, SK_ColorLTGRAY, 25);          \
         return do_rescale_image_grid(canvas, #IMAGE_FILE, SRC_RECT, {W, H}, true, false,   \
                                      errorMsg);                                            \
     }

 #define DEF_RESCALE_AND_READ_YUV_SURF_GM(IMAGE_FILE, TAG, SRC_RECT, W, H)                          \
     DEF_SIMPLE_GM_CAN_FAIL(async_rescale_and_read_yuv420_##TAG, canvas, errorMsg, 3 * W, 2 * H) {  \
         ToolUtils::draw_checkerboard(canvas, SK_ColorDKGRAY, SK_ColorLTGRAY, 25);                  \
         return do_rescale_image_grid(canvas, #IMAGE_FILE, SRC_RECT, {W, H}, true, true, errorMsg); \
     }

 #define DEF_RESCALE_AND_READ_IMG_GM(IMAGE_FILE, TAG, SRC_RECT, W, H)                       \
     DEF_SIMPLE_GM_CAN_FAIL(async_rescale_and_read_##TAG, canvas, errorMsg, 3 * W, 2 * H) { \
         ToolUtils::draw_checkerboard(canvas, SK_ColorDKGRAY, SK_ColorLTGRAY, 25);          \
         return do_rescale_image_grid(canvas, #IMAGE_FILE, SRC_RECT, {W, H}, false, false,  \
                                      errorMsg);                                            \
     }

 #define DEF_RESCALE_AND_READ_YUV_IMG_GM(IMAGE_FILE, TAG, SRC_RECT, W, H)                           \
     DEF_SIMPLE_GM_CAN_FAIL(async_rescale_and_read_yuv420_##TAG, canvas, errorMsg, 3 * W, 2 * H) {  \
         ToolUtils::draw_checkerboard(canvas, SK_ColorDKGRAY, SK_ColorLTGRAY, 25);                  \
         return do_rescale_image_grid(canvas, #IMAGE_FILE, SRC_RECT, {W, H}, true, true, errorMsg); \
     }

 DEF_RESCALE_AND_READ_YUV_SURF_GM(
         images/yellow_rose.webp, rose, SkIRect::MakeXYWH(50, 5, 200, 150), 410, 376)

 DEF_RESCALE_AND_READ_YUV_IMG_GM(
         images/yellow_rose.webp, rose_down, SkIRect::MakeXYWH(50, 5, 200, 150), 106, 60)

 DEF_RESCALE_AND_READ_SURF_GM(
         images/yellow_rose.webp, rose, SkIRect::MakeXYWH(100, 20, 100, 100), 410, 410)

 DEF_RESCALE_AND_READ_SURF_GM(images/dog.jpg, dog_down, SkIRect::MakeXYWH(0, 10, 180, 150), 45, 45)
 DEF_RESCALE_AND_READ_IMG_GM(images/dog.jpg, dog_up, SkIRect::MakeWH(180, 180), 800, 400)

 DEF_RESCALE_AND_READ_IMG_GM(
         images/text.png, text_down, SkIRect::MakeWH(637, 105), (int)(0.7 * 637), (int)(0.7 * 105))
 DEF_RESCALE_AND_READ_SURF_GM(
         images/text.png, text_up, SkIRect::MakeWH(637, 105), (int)(1.2 * 637), (int)(1.2 * 105))
 DEF_RESCALE_AND_READ_IMG_GM(images/text.png,
                             text_up_large,
                             SkIRect::MakeXYWH(300, 0, 300, 105),
                             (int)(2.4 * 300),
                             (int)(2.4 * 105))

 // Exercises non-scaling YUV420. Reads from the original canvas's surface in order to
 // exercise case where source surface is not a texture (in glbert config).
 DEF_SIMPLE_GM_CAN_FAIL(async_yuv_no_scale, canvas, errorMsg, 400, 300) {
     auto surface = canvas->getSurface();
     if (!surface) {
         *errorMsg = "Not supported on recording/vector backends.";
         return skiagm::DrawResult::kSkip;
     }

     auto image = GetResourceAsImage("images/yellow_rose.webp");
     if (!image) {
         return skiagm::DrawResult::kFail;
     }
     SkPaint paint;
     canvas->drawImage(image.get(), 0, 0);

     SkScopeExit scopeExit;
     auto yuvImage = do_read_and_scale_yuv(
             surface, surface->getContext(), kRec601_SkYUVColorSpace, SkIRect::MakeWH(400, 300),
             {400, 300}, SkImage::RescaleGamma::kSrc, kNone_SkFilterQuality, &scopeExit);

     canvas->clear(SK_ColorWHITE);
     canvas->drawImage(yuvImage.get(), 0, 0);

     return skiagm::DrawResult::kOk;
 }

 DEF_SIMPLE_GM_CAN_FAIL(async_rescale_and_read_no_bleed, canvas, errorMsg, 60, 60) {
     if (canvas->imageInfo().colorType() == kUnknown_SkColorType) {
         *errorMsg = "Not supported on recording/vector backends.";
         return skiagm::DrawResult::kSkip;
     }

     static constexpr int kBorder = 5;
     static constexpr int kInner = 5;
     const auto srcRect = SkIRect::MakeXYWH(kBorder, kBorder, kInner, kInner);
     auto surfaceII =
             SkImageInfo::Make(kInner + 2 * kBorder, kInner + 2 * kBorder, kRGBA_8888_SkColorType,
                               kPremul_SkAlphaType, SkColorSpace::MakeSRGB());
     auto surface = canvas->makeSurface(surfaceII);
     if (!surface) {
         *errorMsg = "Could not create surface for image.";
         // When testing abandoned GrContext we expect surface creation to fail.
         if (canvas->getGrContext() && canvas->getGrContext()->abandoned()) {
             return skiagm::DrawResult::kSkip;
         }
         return skiagm::DrawResult::kFail;
     }
     surface->getCanvas()->clear(SK_ColorRED);
     surface->getCanvas()->save();
     surface->getCanvas()->clipRect(SkRect::Make(srcRect), SkClipOp::kIntersect, false);
     surface->getCanvas()->clear(SK_ColorBLUE);
     surface->getCanvas()->restore();
     static constexpr int kPad = 2;
     canvas->translate(kPad, kPad);
     skiagm::DrawResult result;
     SkISize downSize = {static_cast<int>(kInner/2),  static_cast<int>(kInner / 2)};
     GrContext* context = canvas->getGrContext();
     result = do_rescale_grid(canvas, surface.get(), context, srcRect, downSize, false, errorMsg,
                              kPad);

     if (result != skiagm::DrawResult::kOk) {
         return result;
     }
     canvas->translate(0, 4 * downSize.height());
     SkISize upSize = {static_cast<int>(kInner * 3.5), static_cast<int>(kInner * 4.6)};
     result =
             do_rescale_grid(canvas, surface.get(), context, srcRect, upSize, false, errorMsg, kPad);
     if (result != skiagm::DrawResult::kOk) {
         return result;
     }
     return skiagm::DrawResult::kOk;
 }
	/*
	* Copyright 2019 Google LLC
	*
	* 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/SkCanvas.h"
	#include "include/core/SkColor.h"
	#include "include/core/SkPaint.h"
	#include "include/core/SkRect.h"
	#include "include/core/SkSurface.h"
	#include "include/core/SkYUVAIndex.h"
	#include "include/gpu/GrContext.h"
	#include "src/core/SkAutoPixmapStorage.h"
	#include "src/core/SkConvertPixels.h"
	#include "src/core/SkScopeExit.h"
	#include "src/gpu/GrContextPriv.h"
	#include "tools/Resources.h"
	#include "tools/ToolUtils.h"

	namespace {
	struct AsyncContext {
	bool fCalled = false;
	std::unique_ptr<const SkImage::AsyncReadResult> fResult;
	};
	} // anonymous namespace

	// Making this a lambda in the test functions caused:
	// "error: cannot compile this forwarded non-trivially copyable parameter yet"
	// on x86/Win/Clang bot, referring to 'result'.
	static void async_callback(void* c, std::unique_ptr<const SkImage::AsyncReadResult> result) {
	auto context = static_cast<AsyncContext*>(c);
	context->fResult = std::move(result);
	context->fCalled = true;
	};

	// Draws the image to a surface, does a asyncRescaleAndReadPixels of the image, and then sticks
	// the result in a raster image.
	template <typename Src>
	static sk_sp<SkImage> do_read_and_scale(Src* src,
	GrContext* context,
	const SkIRect& srcRect,
	const SkImageInfo& ii,
	SkImage::RescaleGamma rescaleGamma,
	SkFilterQuality quality) {
	auto* asyncContext = new AsyncContext();
	src->asyncRescaleAndReadPixels(ii, srcRect, rescaleGamma, quality, async_callback,
	asyncContext);
	if (context) {
	context->submit();
	}
	while (!asyncContext->fCalled) {
	// Only GPU should actually be asynchronous.
	SkASSERT(context);
	context->checkAsyncWorkCompletion();
	}
	if (!asyncContext->fResult) {
	return nullptr;
	}
	SkPixmap pixmap(ii, asyncContext->fResult->data(0), asyncContext->fResult->rowBytes(0));
	auto releasePixels = [](const void, void c) { delete static_cast<AsyncContext*>(c); };
	return SkImage::MakeFromRaster(pixmap, releasePixels, asyncContext);
	}

	template <typename Src>
	static sk_sp<SkImage> do_read_and_scale_yuv(Src* src,
	GrContext* context,
	SkYUVColorSpace yuvCS,
	const SkIRect& srcRect,
	SkISize size,
	SkImage::RescaleGamma rescaleGamma,
	SkFilterQuality quality,
	SkScopeExit* cleanup) {
	SkASSERT(!(size.width() & 0b1) && !(size.height() & 0b1));

	SkISize uvSize = {size.width()/2, size.height()/2};
	SkImageInfo yII = SkImageInfo::Make(size, kGray_8_SkColorType, kPremul_SkAlphaType);
	SkImageInfo uvII = SkImageInfo::Make(uvSize, kGray_8_SkColorType, kPremul_SkAlphaType);

	AsyncContext asyncContext;
	src->asyncRescaleAndReadPixelsYUV420(yuvCS, SkColorSpace::MakeSRGB(), srcRect, size,
	rescaleGamma, quality, async_callback, &asyncContext);
	if (context) {
	context->submit();
	}
	while (!asyncContext.fCalled) {
	// Only GPU should actually be asynchronous.
	SkASSERT(context);
	context->checkAsyncWorkCompletion();
	}
	if (!asyncContext.fResult) {
	return nullptr;
	}
	GrBackendTexture backendTextures[3];

	SkPixmap yPM(yII, asyncContext.fResult->data(0), asyncContext.fResult->rowBytes(0));
	SkPixmap uPM(uvII, asyncContext.fResult->data(1), asyncContext.fResult->rowBytes(1));
	SkPixmap vPM(uvII, asyncContext.fResult->data(2), asyncContext.fResult->rowBytes(2));

	backendTextures[0] = context->createBackendTexture(yPM, GrRenderable::kNo, GrProtected::kNo);
	backendTextures[1] = context->createBackendTexture(uPM, GrRenderable::kNo, GrProtected::kNo);
	backendTextures[2] = context->createBackendTexture(vPM, GrRenderable::kNo, GrProtected::kNo);

	SkYUVAIndex indices[4] = {
	{ 0, SkColorChannel::kR},
	{ 1, SkColorChannel::kR},
	{ 2, SkColorChannel::kR},
	{-1, SkColorChannel::kR}
	};

	*cleanup = {[context, backendTextures] {
	GrFlushInfo flushInfo;
	flushInfo.fFlags = kSyncCpu_GrFlushFlag;
	context->flush(flushInfo);
	context->submit(true);
	context->deleteBackendTexture(backendTextures[0]);
	context->deleteBackendTexture(backendTextures[1]);
	context->deleteBackendTexture(backendTextures[2]);
	}};

	return SkImage::MakeFromYUVATextures(context, yuvCS, backendTextures, indices, size,
	kTopLeft_GrSurfaceOrigin, SkColorSpace::MakeSRGB());
	}

	// Draws a grid of rescales. The columns are none, low, and high filter quality. The rows are
	// rescale in src gamma and rescale in linear gamma.
	template <typename Src>
	static skiagm::DrawResult do_rescale_grid(SkCanvas* canvas,
	Src* src,
	GrContext* context,
	const SkIRect& srcRect,
	SkISize newSize,
	bool doYUV420,
	SkString* errorMsg,
	int pad = 0) {
	if (doYUV420) {
	if (!canvas->getGrContext() \|\| !canvas->getGrContext()->priv().asDirectContext()) {
	errorMsg->printf("YUV420 only supported on direct GPU for now.");
	return skiagm::DrawResult::kSkip;
	}
	}
	if (canvas->imageInfo().colorType() == kUnknown_SkColorType) {
	*errorMsg = "Not supported on recording/vector backends.";
	return skiagm::DrawResult::kSkip;
	}
	const auto ii = canvas->imageInfo().makeDimensions(newSize);

	SkYUVColorSpace yuvColorSpace = kRec601_SkYUVColorSpace;
	canvas->save();
	for (auto gamma : {SkImage::RescaleGamma::kSrc, SkImage::RescaleGamma::kLinear}) {
	canvas->save();
	for (auto quality : {kNone_SkFilterQuality, kLow_SkFilterQuality, kHigh_SkFilterQuality}) {
	SkScopeExit cleanup;
	sk_sp<SkImage> result;
	if (doYUV420) {
	result = do_read_and_scale_yuv(src, context, yuvColorSpace, srcRect, newSize, gamma,
	quality, &cleanup);
	if (!result) {
	errorMsg->printf("YUV420 async call failed. Allowed for now.");
	return skiagm::DrawResult::kSkip;
	}
	int nextCS = static_cast<int>(yuvColorSpace + 1) % (kLastEnum_SkYUVColorSpace + 1);
	yuvColorSpace = static_cast<SkYUVColorSpace>(nextCS);
	} else {
	result = do_read_and_scale(src, context, srcRect, ii, gamma, quality);
	if (!result) {
	errorMsg->printf("async read call failed.");
	return skiagm::DrawResult::kFail;
	}
	}
	canvas->drawImage(result, 0, 0);
	canvas->translate(newSize.width() + pad, 0);
	}
	canvas->restore();
	canvas->translate(0, newSize.height() + pad);
	}
	canvas->restore();
	return skiagm::DrawResult::kOk;
	}

	static skiagm::DrawResult do_rescale_image_grid(SkCanvas* canvas,
	const char* imageFile,
	const SkIRect& srcRect,
	SkISize newSize,
	bool doSurface,
	bool doYUV420,
	SkString* errorMsg) {
	auto image = GetResourceAsImage(imageFile);
	if (!image) {
	errorMsg->printf("Could not load image file %s.", imageFile);
	return skiagm::DrawResult::kFail;
	}
	if (canvas->imageInfo().colorType() == kUnknown_SkColorType) {
	*errorMsg = "Not supported on recording/vector backends.";
	return skiagm::DrawResult::kSkip;
	}
	if (doSurface) {
	// Turn the image into a surface in order to call the read and rescale API
	auto surfInfo = image->imageInfo().makeDimensions(image->dimensions());
	auto surface = canvas->makeSurface(surfInfo);
	if (!surface && surfInfo.colorType() == kBGRA_8888_SkColorType) {
	surfInfo = surfInfo.makeColorType(kRGBA_8888_SkColorType);
	surface = canvas->makeSurface(surfInfo);
	}
	if (!surface) {
	*errorMsg = "Could not create surface for image.";
	// When testing abandoned GrContext we expect surface creation to fail.
	if (canvas->getGrContext() && canvas->getGrContext()->abandoned()) {
	return skiagm::DrawResult::kSkip;
	}
	return skiagm::DrawResult::kFail;
	}
	SkPaint paint;
	paint.setBlendMode(SkBlendMode::kSrc);
	surface->getCanvas()->drawImage(image, 0, 0, &paint);
	return do_rescale_grid(canvas, surface.get(), canvas->getGrContext(), srcRect, newSize,
	doYUV420, errorMsg);
	} else if (auto ctx = canvas->getGrContext()) {
	image = image->makeTextureImage(ctx);
	if (!image) {
	*errorMsg = "Could not create image.";
	// When testing abandoned GrContext we expect surface creation to fail.
	if (canvas->getGrContext() && canvas->getGrContext()->abandoned()) {
	return skiagm::DrawResult::kSkip;
	}
	return skiagm::DrawResult::kFail;
	}
	}
	return do_rescale_grid(canvas, image.get(), canvas->getGrContext(), srcRect, newSize, doYUV420,
	errorMsg);
	}

	#define DEF_RESCALE_AND_READ_SURF_GM(IMAGE_FILE, TAG, SRC_RECT, W, H) \
	DEF_SIMPLE_GM_CAN_FAIL(async_rescale_and_read_##TAG, canvas, errorMsg, 3 * W, 2 * H) { \
	ToolUtils::draw_checkerboard(canvas, SK_ColorDKGRAY, SK_ColorLTGRAY, 25); \
	return do_rescale_image_grid(canvas, #IMAGE_FILE, SRC_RECT, {W, H}, true, false, \
	errorMsg); \
	}

	#define DEF_RESCALE_AND_READ_YUV_SURF_GM(IMAGE_FILE, TAG, SRC_RECT, W, H) \
	DEF_SIMPLE_GM_CAN_FAIL(async_rescale_and_read_yuv420_##TAG, canvas, errorMsg, 3 * W, 2 * H) { \
	ToolUtils::draw_checkerboard(canvas, SK_ColorDKGRAY, SK_ColorLTGRAY, 25); \
	return do_rescale_image_grid(canvas, #IMAGE_FILE, SRC_RECT, {W, H}, true, true, errorMsg); \
	}

	#define DEF_RESCALE_AND_READ_IMG_GM(IMAGE_FILE, TAG, SRC_RECT, W, H) \
	DEF_SIMPLE_GM_CAN_FAIL(async_rescale_and_read_##TAG, canvas, errorMsg, 3 * W, 2 * H) { \
	ToolUtils::draw_checkerboard(canvas, SK_ColorDKGRAY, SK_ColorLTGRAY, 25); \
	return do_rescale_image_grid(canvas, #IMAGE_FILE, SRC_RECT, {W, H}, false, false, \
	errorMsg); \
	}

	#define DEF_RESCALE_AND_READ_YUV_IMG_GM(IMAGE_FILE, TAG, SRC_RECT, W, H) \
	DEF_SIMPLE_GM_CAN_FAIL(async_rescale_and_read_yuv420_##TAG, canvas, errorMsg, 3 * W, 2 * H) { \
	ToolUtils::draw_checkerboard(canvas, SK_ColorDKGRAY, SK_ColorLTGRAY, 25); \
	return do_rescale_image_grid(canvas, #IMAGE_FILE, SRC_RECT, {W, H}, true, true, errorMsg); \
	}

	DEF_RESCALE_AND_READ_YUV_SURF_GM(
	images/yellow_rose.webp, rose, SkIRect::MakeXYWH(50, 5, 200, 150), 410, 376)

	DEF_RESCALE_AND_READ_YUV_IMG_GM(
	images/yellow_rose.webp, rose_down, SkIRect::MakeXYWH(50, 5, 200, 150), 106, 60)

	DEF_RESCALE_AND_READ_SURF_GM(
	images/yellow_rose.webp, rose, SkIRect::MakeXYWH(100, 20, 100, 100), 410, 410)

	DEF_RESCALE_AND_READ_SURF_GM(images/dog.jpg, dog_down, SkIRect::MakeXYWH(0, 10, 180, 150), 45, 45)
	DEF_RESCALE_AND_READ_IMG_GM(images/dog.jpg, dog_up, SkIRect::MakeWH(180, 180), 800, 400)

	DEF_RESCALE_AND_READ_IMG_GM(
	images/text.png, text_down, SkIRect::MakeWH(637, 105), (int)(0.7 * 637), (int)(0.7 * 105))
	DEF_RESCALE_AND_READ_SURF_GM(
	images/text.png, text_up, SkIRect::MakeWH(637, 105), (int)(1.2 * 637), (int)(1.2 * 105))
	DEF_RESCALE_AND_READ_IMG_GM(images/text.png,
	text_up_large,
	SkIRect::MakeXYWH(300, 0, 300, 105),
	(int)(2.4 * 300),
	(int)(2.4 * 105))

	// Exercises non-scaling YUV420. Reads from the original canvas's surface in order to
	// exercise case where source surface is not a texture (in glbert config).
	DEF_SIMPLE_GM_CAN_FAIL(async_yuv_no_scale, canvas, errorMsg, 400, 300) {
	auto surface = canvas->getSurface();
	if (!surface) {
	*errorMsg = "Not supported on recording/vector backends.";
	return skiagm::DrawResult::kSkip;
	}

	auto image = GetResourceAsImage("images/yellow_rose.webp");
	if (!image) {
	return skiagm::DrawResult::kFail;
	}
	SkPaint paint;
	canvas->drawImage(image.get(), 0, 0);

	SkScopeExit scopeExit;
	auto yuvImage = do_read_and_scale_yuv(
	surface, surface->getContext(), kRec601_SkYUVColorSpace, SkIRect::MakeWH(400, 300),
	{400, 300}, SkImage::RescaleGamma::kSrc, kNone_SkFilterQuality, &scopeExit);

	canvas->clear(SK_ColorWHITE);
	canvas->drawImage(yuvImage.get(), 0, 0);

	return skiagm::DrawResult::kOk;
	}

	DEF_SIMPLE_GM_CAN_FAIL(async_rescale_and_read_no_bleed, canvas, errorMsg, 60, 60) {
	if (canvas->imageInfo().colorType() == kUnknown_SkColorType) {
	*errorMsg = "Not supported on recording/vector backends.";
	return skiagm::DrawResult::kSkip;
	}

	static constexpr int kBorder = 5;
	static constexpr int kInner = 5;
	const auto srcRect = SkIRect::MakeXYWH(kBorder, kBorder, kInner, kInner);
	auto surfaceII =
	SkImageInfo::Make(kInner + 2 * kBorder, kInner + 2 * kBorder, kRGBA_8888_SkColorType,
	kPremul_SkAlphaType, SkColorSpace::MakeSRGB());
	auto surface = canvas->makeSurface(surfaceII);
	if (!surface) {
	*errorMsg = "Could not create surface for image.";
	// When testing abandoned GrContext we expect surface creation to fail.
	if (canvas->getGrContext() && canvas->getGrContext()->abandoned()) {
	return skiagm::DrawResult::kSkip;
	}
	return skiagm::DrawResult::kFail;
	}
	surface->getCanvas()->clear(SK_ColorRED);
	surface->getCanvas()->save();
	surface->getCanvas()->clipRect(SkRect::Make(srcRect), SkClipOp::kIntersect, false);
	surface->getCanvas()->clear(SK_ColorBLUE);
	surface->getCanvas()->restore();
	static constexpr int kPad = 2;
	canvas->translate(kPad, kPad);
	skiagm::DrawResult result;
	SkISize downSize = {static_cast<int>(kInner/2), static_cast<int>(kInner / 2)};
	GrContext* context = canvas->getGrContext();
	result = do_rescale_grid(canvas, surface.get(), context, srcRect, downSize, false, errorMsg,
	kPad);

	if (result != skiagm::DrawResult::kOk) {
	return result;
	}
	canvas->translate(0, 4 * downSize.height());
	SkISize upSize = {static_cast<int>(kInner * 3.5), static_cast<int>(kInner * 4.6)};
	result =
	do_rescale_grid(canvas, surface.get(), context, srcRect, upSize, false, errorMsg, kPad);
	if (result != skiagm::DrawResult::kOk) {
	return result;
	}
	return skiagm::DrawResult::kOk;
	}