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

 /*
  * Copyright 2019 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #include "include/core/SkCanvas.h"
 #include "include/gpu/GrDirectContext.h"
 #include "include/gpu/GrRecordingContext.h"
 #include "src/core/SkAutoPixmapStorage.h"
 #include "src/core/SkCompressedDataUtils.h"
 #include "src/core/SkMipmap.h"
 #include "src/core/SkPaintPriv.h"
 #include "src/gpu/GrBackendUtils.h"
 #include "src/gpu/GrDirectContextPriv.h"
 #include "src/image/SkImage_Base.h"
 #include "tests/Test.h"
 #include "tests/TestUtils.h"
 #include "tools/ToolUtils.h"

 // Just verify that 'actual' is entirely 'expected'
 static void check_solid_pixmap(skiatest::Reporter* reporter,
                                const SkColor4f& expected, const SkPixmap& actual,
                                const char* label0, const char* label1, const char* label2) {
     const float tols[4] = { 0.01f, 0.01f, 0.01f, 0.01f };

     auto error = std::function<ComparePixmapsErrorReporter>(
         [reporter, label0, label1, label2](int x, int y, const float diffs[4]) {
             SkASSERT(x >= 0 && y >= 0);
             ERRORF(reporter, "%s %s %s - mismatch at %d, %d (%f, %f, %f %f)",
                    label0, label1, label2, x, y,
                    diffs[0], diffs[1], diffs[2], diffs[3]);
         });

     CheckSolidPixels(expected, actual, tols, error);
 }

 // Create an SkImage to wrap 'backendTex'
 sk_sp<SkImage> create_image(GrDirectContext* dContext, const GrBackendTexture& backendTex) {
     SkImage::CompressionType compression =
             GrBackendFormatToCompressionType(backendTex.getBackendFormat());

     SkAlphaType at = SkCompressionTypeIsOpaque(compression) ? kOpaque_SkAlphaType
                                                             : kPremul_SkAlphaType;

     return SkImage::MakeFromCompressedTexture(dContext,
                                               backendTex,
                                               kTopLeft_GrSurfaceOrigin,
                                               at,
                                               nullptr);
 }

 // Draw the compressed backend texture (wrapped in an SkImage) into an RGBA surface, attempting
 // to access all the mipMap levels.
 static void check_compressed_mipmaps(GrRecordingContext* rContext, sk_sp<SkImage> img,
                                      SkImage::CompressionType compressionType,
                                      const SkColor4f expectedColors[6],
                                      GrMipmapped mipMapped,
                                      skiatest::Reporter* reporter, const char* label) {

     SkImageInfo readbackSurfaceII = SkImageInfo::Make(32, 32, kRGBA_8888_SkColorType,
                                                       kPremul_SkAlphaType);

     sk_sp<SkSurface> surf = SkSurface::MakeRenderTarget(rContext,
                                                         SkBudgeted::kNo,
                                                         readbackSurfaceII, 1,
                                                         kTopLeft_GrSurfaceOrigin,
                                                         nullptr);
     if (!surf) {
         return;
     }

     SkCanvas* canvas = surf->getCanvas();

     const SkSamplingOptions sampling(SkFilterMode::kLinear,
                                      SkMipmapMode::kLinear);
     SkPaint p;
     p.setBlendMode(SkBlendMode::kSrc);

     int numMipLevels = 1;
     if (mipMapped == GrMipmapped::kYes) {
         numMipLevels = SkMipmap::ComputeLevelCount(32, 32)+1;
     }

     for (int i = 0, rectSize = 32; i < numMipLevels; ++i, rectSize /= 2) {
         SkASSERT(rectSize >= 1);

         canvas->clear(SK_ColorTRANSPARENT);

         SkRect r = SkRect::MakeWH(rectSize, rectSize);
         canvas->drawImageRect(img, r, sampling, &p);

         SkImageInfo readbackII = SkImageInfo::Make(rectSize, rectSize,
                                                    kRGBA_8888_SkColorType,
                                                    kUnpremul_SkAlphaType);
         SkAutoPixmapStorage actual2;
         SkAssertResult(actual2.tryAlloc(readbackII));
         actual2.erase(SkColors::kTransparent);

         bool result = surf->readPixels(actual2, 0, 0);
         REPORTER_ASSERT(reporter, result);

         SkString str;
         str.appendf("mip-level %d", i);

         check_solid_pixmap(reporter, expectedColors[i], actual2,
                            GrCompressionTypeToStr(compressionType), label, str.c_str());
     }
 }

 // Verify that we can readback from a compressed texture
 static void check_readback(GrDirectContext* dContext, sk_sp<SkImage> img,
                            SkImage::CompressionType compressionType,
                            const SkColor4f& expectedColor,
                            skiatest::Reporter* reporter, const char* label) {
 #ifdef SK_BUILD_FOR_IOS
     // reading back ETC2 is broken on Metal/iOS (skbug.com/9839)
     if (dContext->backend() == GrBackendApi::kMetal) {
       return;
     }
 #endif

     SkAutoPixmapStorage actual;

     SkImageInfo readBackII = SkImageInfo::Make(img->width(), img->height(),
                                                kRGBA_8888_SkColorType,
                                                kUnpremul_SkAlphaType);

     SkAssertResult(actual.tryAlloc(readBackII));
     actual.erase(SkColors::kTransparent);

     bool result = img->readPixels(dContext, actual, 0, 0);
     REPORTER_ASSERT(reporter, result);

     check_solid_pixmap(reporter, expectedColor, actual,
                        GrCompressionTypeToStr(compressionType), label, "");
 }

 // Test initialization of compressed GrBackendTextures to a specific color
 static void test_compressed_color_init(GrDirectContext* dContext,
                                        skiatest::Reporter* reporter,
                                        std::function<GrBackendTexture (GrDirectContext*,
                                                                        const SkColor4f&,
                                                                        GrMipmapped)> create,
                                        const SkColor4f& color,
                                        SkImage::CompressionType compression,
                                        GrMipmapped mipMapped) {
     GrBackendTexture backendTex = create(dContext, color, mipMapped);
     if (!backendTex.isValid()) {
         return;
     }

     sk_sp<SkImage> img = create_image(dContext, backendTex);
     if (!img) {
         return;
     }

     SkColor4f expectedColors[6] = { color, color, color, color, color, color };

     check_compressed_mipmaps(dContext, img, compression, expectedColors, mipMapped,
                              reporter, "colorinit");
     check_readback(dContext, img, compression, color, reporter, "solid readback");

     SkColor4f newColor;
     newColor.fR = color.fB;
     newColor.fG = color.fR;
     newColor.fB = color.fG;
     newColor.fA = color.fA;

     bool result = dContext->updateCompressedBackendTexture(backendTex, newColor, nullptr, nullptr);
     // Since we were able to create the compressed texture we should be able to update it.
     REPORTER_ASSERT(reporter, result);

     SkColor4f expectedNewColors[6] = {newColor, newColor, newColor, newColor, newColor, newColor};

     check_compressed_mipmaps(dContext, img, compression, expectedNewColors, mipMapped, reporter,
                              "colorinit");
     check_readback(dContext, std::move(img), compression, newColor, reporter, "solid readback");

     dContext->deleteBackendTexture(backendTex);
 }

 // Create compressed data pulling the color for each mipmap level from 'levelColors'.
 static std::unique_ptr<const char[]> make_compressed_data(SkImage::CompressionType compression,
                                                           SkColor4f levelColors[6],
                                                           GrMipmapped mipMapped) {
     SkISize dimensions { 32, 32 };

     int numMipLevels = 1;
     if (mipMapped == GrMipmapped::kYes) {
         numMipLevels = SkMipmap::ComputeLevelCount(dimensions.width(), dimensions.height()) + 1;
     }

     SkTArray<size_t> mipMapOffsets(numMipLevels);

     size_t dataSize = SkCompressedDataSize(compression, dimensions, &mipMapOffsets,
                                            mipMapped == GrMipmapped::kYes);
     char* data = new char[dataSize];

     for (int level = 0; level < numMipLevels; ++level) {
         // We have to do this a level at a time bc we might have a different color for
         // each level
         GrFillInCompressedData(compression, dimensions,
                                GrMipmapped::kNo, &data[mipMapOffsets[level]], levelColors[level]);

         dimensions = {std::max(1, dimensions.width() /2), std::max(1, dimensions.height()/2)};
     }

     return std::unique_ptr<const char[]>(data);
 }

 // Verify that we can initialize a compressed backend texture with data (esp.
 // the mipmap levels).
 static void test_compressed_data_init(GrDirectContext* dContext,
                                       skiatest::Reporter* reporter,
                                       std::function<GrBackendTexture (GrDirectContext*,
                                                                       const char* data,
                                                                       size_t dataSize,
                                                                       GrMipmapped)> create,
                                       SkImage::CompressionType compression,
                                       GrMipmapped mipMapped) {

     SkColor4f expectedColors[6] = {
         { 1.0f, 0.0f, 0.0f, 1.0f }, // R
         { 0.0f, 1.0f, 0.0f, 1.0f }, // G
         { 0.0f, 0.0f, 1.0f, 1.0f }, // B
         { 0.0f, 1.0f, 1.0f, 1.0f }, // C
         { 1.0f, 0.0f, 1.0f, 1.0f }, // M
         { 1.0f, 1.0f, 0.0f, 1.0f }, // Y
     };

     std::unique_ptr<const char[]> data(make_compressed_data(compression, expectedColors,
                                                             mipMapped));
     size_t dataSize = SkCompressedDataSize(compression, { 32, 32 }, nullptr,
                                            mipMapped == GrMipmapped::kYes);

     GrBackendTexture backendTex = create(dContext, data.get(), dataSize, mipMapped);
     if (!backendTex.isValid()) {
         return;
     }

     sk_sp<SkImage> img = create_image(dContext, backendTex);
     if (!img) {
         return;
     }

     check_compressed_mipmaps(dContext, img, compression, expectedColors,
                              mipMapped, reporter, "pixmap");
     check_readback(dContext, img, compression, expectedColors[0], reporter, "data readback");

     SkColor4f expectedColorsNew[6] = {
         {1.0f, 1.0f, 0.0f, 1.0f},  // Y
         {1.0f, 0.0f, 0.0f, 1.0f},  // R
         {0.0f, 1.0f, 0.0f, 1.0f},  // G
         {0.0f, 0.0f, 1.0f, 1.0f},  // B
         {0.0f, 1.0f, 1.0f, 1.0f},  // C
         {1.0f, 0.0f, 1.0f, 1.0f},  // M
     };

     std::unique_ptr<const char[]> dataNew(
             make_compressed_data(compression, expectedColorsNew, mipMapped));
     size_t dataNewSize =
             SkCompressedDataSize(compression, {32, 32}, nullptr, mipMapped == GrMipMapped::kYes);

     bool result = dContext->updateCompressedBackendTexture(backendTex, dataNew.get(), dataNewSize,
                                                            nullptr, nullptr);
     // Since we were able to create the compressed texture we should be able to update it.
     REPORTER_ASSERT(reporter, result);

     check_compressed_mipmaps(dContext, img, compression, expectedColorsNew, mipMapped, reporter,
                              "pixmap");
     check_readback(dContext, std::move(img), compression, expectedColorsNew[0], reporter,
                    "data readback");

     dContext->deleteBackendTexture(backendTex);
 }

 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(CompressedBackendAllocationTest, reporter, ctxInfo) {
     auto dContext = ctxInfo.directContext();
     const GrCaps* caps = dContext->priv().caps();

     struct {
         SkImage::CompressionType fCompression;
         SkColor4f                fColor;
     } combinations[] = {
         { SkImage::CompressionType::kETC2_RGB8_UNORM, SkColors::kRed },
         { SkImage::CompressionType::kBC1_RGB8_UNORM,  SkColors::kBlue },
         { SkImage::CompressionType::kBC1_RGBA8_UNORM, SkColors::kTransparent },
     };

     for (auto combo : combinations) {
         GrBackendFormat format = dContext->compressedBackendFormat(combo.fCompression);
         if (!format.isValid()) {
             continue;
         }

         if (!caps->isFormatTexturable(format)) {
             continue;
         }

         for (auto mipMapped : { GrMipmapped::kNo, GrMipmapped::kYes }) {
             if (GrMipmapped::kYes == mipMapped && !caps->mipmapSupport()) {
                 continue;
             }

             // color initialized
             {
                 auto createWithColorMtd = [format](GrDirectContext* dContext,
                                                    const SkColor4f& color,
                                                    GrMipmapped mipMapped) {
                     return dContext->createCompressedBackendTexture(32, 32, format, color,
                                                                     mipMapped, GrProtected::kNo);
                 };

                 test_compressed_color_init(dContext, reporter, createWithColorMtd,
                                            combo.fColor, combo.fCompression, mipMapped);
             }

             // data initialized
             {
                 auto createWithDataMtd = [format](GrDirectContext* dContext,
                                                   const char* data, size_t dataSize,
                                                   GrMipmapped mipMapped) {
                     return dContext->createCompressedBackendTexture(32, 32, format, data, dataSize,
                                                                     mipMapped, GrProtected::kNo);
                 };

                 test_compressed_data_init(dContext, reporter, createWithDataMtd,
                                           combo.fCompression, mipMapped);
             }

         }
     }
 }
	/*
	* Copyright 2019 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#include "include/core/SkCanvas.h"
	#include "include/gpu/GrDirectContext.h"
	#include "include/gpu/GrRecordingContext.h"
	#include "src/core/SkAutoPixmapStorage.h"
	#include "src/core/SkCompressedDataUtils.h"
	#include "src/core/SkMipmap.h"
	#include "src/core/SkPaintPriv.h"
	#include "src/gpu/GrBackendUtils.h"
	#include "src/gpu/GrDirectContextPriv.h"
	#include "src/image/SkImage_Base.h"
	#include "tests/Test.h"
	#include "tests/TestUtils.h"
	#include "tools/ToolUtils.h"

	// Just verify that 'actual' is entirely 'expected'
	static void check_solid_pixmap(skiatest::Reporter* reporter,
	const SkColor4f& expected, const SkPixmap& actual,
	const char* label0, const char* label1, const char* label2) {
	const float tols[4] = { 0.01f, 0.01f, 0.01f, 0.01f };

	auto error = std::function<ComparePixmapsErrorReporter>(
	[reporter, label0, label1, label2](int x, int y, const float diffs[4]) {
	SkASSERT(x >= 0 && y >= 0);
	ERRORF(reporter, "%s %s %s - mismatch at %d, %d (%f, %f, %f %f)",
	label0, label1, label2, x, y,
	diffs[0], diffs[1], diffs[2], diffs[3]);
	});

	CheckSolidPixels(expected, actual, tols, error);
	}

	// Create an SkImage to wrap 'backendTex'
	sk_sp<SkImage> create_image(GrDirectContext* dContext, const GrBackendTexture& backendTex) {
	SkImage::CompressionType compression =
	GrBackendFormatToCompressionType(backendTex.getBackendFormat());

	SkAlphaType at = SkCompressionTypeIsOpaque(compression) ? kOpaque_SkAlphaType
	: kPremul_SkAlphaType;

	return SkImage::MakeFromCompressedTexture(dContext,
	backendTex,
	kTopLeft_GrSurfaceOrigin,
	at,
	nullptr);
	}

	// Draw the compressed backend texture (wrapped in an SkImage) into an RGBA surface, attempting
	// to access all the mipMap levels.
	static void check_compressed_mipmaps(GrRecordingContext* rContext, sk_sp<SkImage> img,
	SkImage::CompressionType compressionType,
	const SkColor4f expectedColors[6],
	GrMipmapped mipMapped,
	skiatest::Reporter* reporter, const char* label) {

	SkImageInfo readbackSurfaceII = SkImageInfo::Make(32, 32, kRGBA_8888_SkColorType,
	kPremul_SkAlphaType);

	sk_sp<SkSurface> surf = SkSurface::MakeRenderTarget(rContext,
	SkBudgeted::kNo,
	readbackSurfaceII, 1,
	kTopLeft_GrSurfaceOrigin,
	nullptr);
	if (!surf) {
	return;
	}

	SkCanvas* canvas = surf->getCanvas();

	const SkSamplingOptions sampling(SkFilterMode::kLinear,
	SkMipmapMode::kLinear);
	SkPaint p;
	p.setBlendMode(SkBlendMode::kSrc);

	int numMipLevels = 1;
	if (mipMapped == GrMipmapped::kYes) {
	numMipLevels = SkMipmap::ComputeLevelCount(32, 32)+1;
	}

	for (int i = 0, rectSize = 32; i < numMipLevels; ++i, rectSize /= 2) {
	SkASSERT(rectSize >= 1);

	canvas->clear(SK_ColorTRANSPARENT);

	SkRect r = SkRect::MakeWH(rectSize, rectSize);
	canvas->drawImageRect(img, r, sampling, &p);

	SkImageInfo readbackII = SkImageInfo::Make(rectSize, rectSize,
	kRGBA_8888_SkColorType,
	kUnpremul_SkAlphaType);
	SkAutoPixmapStorage actual2;
	SkAssertResult(actual2.tryAlloc(readbackII));
	actual2.erase(SkColors::kTransparent);

	bool result = surf->readPixels(actual2, 0, 0);
	REPORTER_ASSERT(reporter, result);

	SkString str;
	str.appendf("mip-level %d", i);

	check_solid_pixmap(reporter, expectedColors[i], actual2,
	GrCompressionTypeToStr(compressionType), label, str.c_str());
	}
	}

	// Verify that we can readback from a compressed texture
	static void check_readback(GrDirectContext* dContext, sk_sp<SkImage> img,
	SkImage::CompressionType compressionType,
	const SkColor4f& expectedColor,
	skiatest::Reporter* reporter, const char* label) {
	#ifdef SK_BUILD_FOR_IOS
	// reading back ETC2 is broken on Metal/iOS (skbug.com/9839)
	if (dContext->backend() == GrBackendApi::kMetal) {
	return;
	}
	#endif

	SkAutoPixmapStorage actual;

	SkImageInfo readBackII = SkImageInfo::Make(img->width(), img->height(),
	kRGBA_8888_SkColorType,
	kUnpremul_SkAlphaType);

	SkAssertResult(actual.tryAlloc(readBackII));
	actual.erase(SkColors::kTransparent);

	bool result = img->readPixels(dContext, actual, 0, 0);
	REPORTER_ASSERT(reporter, result);

	check_solid_pixmap(reporter, expectedColor, actual,
	GrCompressionTypeToStr(compressionType), label, "");
	}

	// Test initialization of compressed GrBackendTextures to a specific color
	static void test_compressed_color_init(GrDirectContext* dContext,
	skiatest::Reporter* reporter,
	std::function<GrBackendTexture (GrDirectContext*,
	const SkColor4f&,
	GrMipmapped)> create,
	const SkColor4f& color,
	SkImage::CompressionType compression,
	GrMipmapped mipMapped) {
	GrBackendTexture backendTex = create(dContext, color, mipMapped);
	if (!backendTex.isValid()) {
	return;
	}

	sk_sp<SkImage> img = create_image(dContext, backendTex);
	if (!img) {
	return;
	}

	SkColor4f expectedColors[6] = { color, color, color, color, color, color };

	check_compressed_mipmaps(dContext, img, compression, expectedColors, mipMapped,
	reporter, "colorinit");
	check_readback(dContext, img, compression, color, reporter, "solid readback");

	SkColor4f newColor;
	newColor.fR = color.fB;
	newColor.fG = color.fR;
	newColor.fB = color.fG;
	newColor.fA = color.fA;

	bool result = dContext->updateCompressedBackendTexture(backendTex, newColor, nullptr, nullptr);
	// Since we were able to create the compressed texture we should be able to update it.
	REPORTER_ASSERT(reporter, result);

	SkColor4f expectedNewColors[6] = {newColor, newColor, newColor, newColor, newColor, newColor};

	check_compressed_mipmaps(dContext, img, compression, expectedNewColors, mipMapped, reporter,
	"colorinit");
	check_readback(dContext, std::move(img), compression, newColor, reporter, "solid readback");

	dContext->deleteBackendTexture(backendTex);
	}

	// Create compressed data pulling the color for each mipmap level from 'levelColors'.
	static std::unique_ptr<const char[]> make_compressed_data(SkImage::CompressionType compression,
	SkColor4f levelColors[6],
	GrMipmapped mipMapped) {
	SkISize dimensions { 32, 32 };

	int numMipLevels = 1;
	if (mipMapped == GrMipmapped::kYes) {
	numMipLevels = SkMipmap::ComputeLevelCount(dimensions.width(), dimensions.height()) + 1;
	}

	SkTArray<size_t> mipMapOffsets(numMipLevels);

	size_t dataSize = SkCompressedDataSize(compression, dimensions, &mipMapOffsets,
	mipMapped == GrMipmapped::kYes);
	char* data = new char[dataSize];

	for (int level = 0; level < numMipLevels; ++level) {
	// We have to do this a level at a time bc we might have a different color for
	// each level
	GrFillInCompressedData(compression, dimensions,
	GrMipmapped::kNo, &data[mipMapOffsets[level]], levelColors[level]);

	dimensions = {std::max(1, dimensions.width() /2), std::max(1, dimensions.height()/2)};
	}

	return std::unique_ptr<const char[]>(data);
	}

	// Verify that we can initialize a compressed backend texture with data (esp.
	// the mipmap levels).
	static void test_compressed_data_init(GrDirectContext* dContext,
	skiatest::Reporter* reporter,
	std::function<GrBackendTexture (GrDirectContext*,
	const char* data,
	size_t dataSize,
	GrMipmapped)> create,
	SkImage::CompressionType compression,
	GrMipmapped mipMapped) {

	SkColor4f expectedColors[6] = {
	{ 1.0f, 0.0f, 0.0f, 1.0f }, // R
	{ 0.0f, 1.0f, 0.0f, 1.0f }, // G
	{ 0.0f, 0.0f, 1.0f, 1.0f }, // B
	{ 0.0f, 1.0f, 1.0f, 1.0f }, // C
	{ 1.0f, 0.0f, 1.0f, 1.0f }, // M
	{ 1.0f, 1.0f, 0.0f, 1.0f }, // Y
	};

	std::unique_ptr<const char[]> data(make_compressed_data(compression, expectedColors,
	mipMapped));
	size_t dataSize = SkCompressedDataSize(compression, { 32, 32 }, nullptr,
	mipMapped == GrMipmapped::kYes);

	GrBackendTexture backendTex = create(dContext, data.get(), dataSize, mipMapped);
	if (!backendTex.isValid()) {
	return;
	}

	sk_sp<SkImage> img = create_image(dContext, backendTex);
	if (!img) {
	return;
	}

	check_compressed_mipmaps(dContext, img, compression, expectedColors,
	mipMapped, reporter, "pixmap");
	check_readback(dContext, img, compression, expectedColors[0], reporter, "data readback");

	SkColor4f expectedColorsNew[6] = {
	{1.0f, 1.0f, 0.0f, 1.0f}, // Y
	{1.0f, 0.0f, 0.0f, 1.0f}, // R
	{0.0f, 1.0f, 0.0f, 1.0f}, // G
	{0.0f, 0.0f, 1.0f, 1.0f}, // B
	{0.0f, 1.0f, 1.0f, 1.0f}, // C
	{1.0f, 0.0f, 1.0f, 1.0f}, // M
	};

	std::unique_ptr<const char[]> dataNew(
	make_compressed_data(compression, expectedColorsNew, mipMapped));
	size_t dataNewSize =
	SkCompressedDataSize(compression, {32, 32}, nullptr, mipMapped == GrMipMapped::kYes);

	bool result = dContext->updateCompressedBackendTexture(backendTex, dataNew.get(), dataNewSize,
	nullptr, nullptr);
	// Since we were able to create the compressed texture we should be able to update it.
	REPORTER_ASSERT(reporter, result);

	check_compressed_mipmaps(dContext, img, compression, expectedColorsNew, mipMapped, reporter,
	"pixmap");
	check_readback(dContext, std::move(img), compression, expectedColorsNew[0], reporter,
	"data readback");

	dContext->deleteBackendTexture(backendTex);
	}

	DEF_GPUTEST_FOR_RENDERING_CONTEXTS(CompressedBackendAllocationTest, reporter, ctxInfo) {
	auto dContext = ctxInfo.directContext();
	const GrCaps* caps = dContext->priv().caps();

	struct {
	SkImage::CompressionType fCompression;
	SkColor4f fColor;
	} combinations[] = {
	{ SkImage::CompressionType::kETC2_RGB8_UNORM, SkColors::kRed },
	{ SkImage::CompressionType::kBC1_RGB8_UNORM, SkColors::kBlue },
	{ SkImage::CompressionType::kBC1_RGBA8_UNORM, SkColors::kTransparent },
	};

	for (auto combo : combinations) {
	GrBackendFormat format = dContext->compressedBackendFormat(combo.fCompression);
	if (!format.isValid()) {
	continue;
	}

	if (!caps->isFormatTexturable(format)) {
	continue;
	}

	for (auto mipMapped : { GrMipmapped::kNo, GrMipmapped::kYes }) {
	if (GrMipmapped::kYes == mipMapped && !caps->mipmapSupport()) {
	continue;
	}

	// color initialized
	{
	auto createWithColorMtd = [format](GrDirectContext* dContext,
	const SkColor4f& color,
	GrMipmapped mipMapped) {
	return dContext->createCompressedBackendTexture(32, 32, format, color,
	mipMapped, GrProtected::kNo);
	};

	test_compressed_color_init(dContext, reporter, createWithColorMtd,
	combo.fColor, combo.fCompression, mipMapped);
	}

	// data initialized
	{
	auto createWithDataMtd = [format](GrDirectContext* dContext,
	const char* data, size_t dataSize,
	GrMipmapped mipMapped) {
	return dContext->createCompressedBackendTexture(32, 32, format, data, dataSize,
	mipMapped, GrProtected::kNo);
	};

	test_compressed_data_init(dContext, reporter, createWithDataMtd,
	combo.fCompression, mipMapped);
	}

	}
	}
	}