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

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #include "SkBitmap.h"
 #include "SkCachingPixelRef.h"
 #include "SkCanvas.h"
 #include "SkData.h"
 #include "SkDecodingImageGenerator.h"
 #include "SkDiscardableMemoryPool.h"
 #include "SkImageDecoder.h"
 #include "SkImageGeneratorPriv.h"
 #include "SkScaledImageCache.h"
 #include "SkStream.h"
 #include "SkUtils.h"

 #include "Test.h"

 /**
  * Fill this bitmap with some color.
  */
 static void make_test_image(SkBitmap* bm) {
     const int W = 50, H = 50;
     bm->allocN32Pixels(W, H);
     bm->eraseColor(SK_ColorBLACK);
     SkCanvas canvas(*bm);
     SkPaint paint;
     paint.setColor(SK_ColorBLUE);
     canvas.drawRectCoords(0, 0, SkIntToScalar(W/2),
                           SkIntToScalar(H/2), paint);
     paint.setColor(SK_ColorWHITE);
     canvas.drawRectCoords(SkIntToScalar(W/2), SkIntToScalar(H/2),
                           SkIntToScalar(W), SkIntToScalar(H), paint);
 }

 /**
  * encode this bitmap into some data via SkImageEncoder
  */
 static SkData* create_data_from_bitmap(const SkBitmap& bm,
                                        SkImageEncoder::Type type) {
     SkDynamicMemoryWStream stream;
     if (SkImageEncoder::EncodeStream(&stream, bm, type, 100)) {
         return stream.copyToData();
     }
     return NULL;
 }

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

 static void compare_bitmaps(skiatest::Reporter* reporter,
                             const SkBitmap& b1, const SkBitmap& b2,
                             bool pixelPerfect = true) {
     REPORTER_ASSERT(reporter, b1.empty() == b2.empty());
     REPORTER_ASSERT(reporter, b1.width() == b2.width());
     REPORTER_ASSERT(reporter, b1.height() == b2.height());
     REPORTER_ASSERT(reporter, b1.isNull() == b2.isNull());
     SkAutoLockPixels autoLockPixels1(b1);
     SkAutoLockPixels autoLockPixels2(b2);
     REPORTER_ASSERT(reporter, b1.isNull() == b2.isNull());
     if (b1.isNull() || b1.empty()) {
         return;
     }
     REPORTER_ASSERT(reporter, NULL != b1.getPixels());
     REPORTER_ASSERT(reporter, NULL != b2.getPixels());
     if ((!(b1.getPixels())) || (!(b2.getPixels()))) {
         return;
     }
     if ((b1.width() != b2.width()) ||
         (b1.height() != b2.height())) {
         return;
     }
     if (!pixelPerfect) {
         return;
     }

     int pixelErrors = 0;
     for (int y = 0; y < b2.height(); ++y) {
         for (int x = 0; x < b2.width(); ++x) {
             if (b1.getColor(x, y) != b2.getColor(x, y)) {
                 ++pixelErrors;
             }
         }
     }
     REPORTER_ASSERT(reporter, 0 == pixelErrors);
 }

 typedef bool (*InstallEncoded)(SkData* encoded, SkBitmap* dst);

 /**
    This function tests three differently encoded images against the
    original bitmap */
 static void test_three_encodings(skiatest::Reporter* reporter,
                                  InstallEncoded install) {
     SkBitmap original;
     make_test_image(&original);
     REPORTER_ASSERT(reporter, !original.empty());
     REPORTER_ASSERT(reporter, !original.isNull());
     if (original.empty() || original.isNull()) {
         return;
     }
     static const SkImageEncoder::Type types[] = {
         SkImageEncoder::kPNG_Type,
         SkImageEncoder::kJPEG_Type,
         SkImageEncoder::kWEBP_Type
     };
     for (size_t i = 0; i < SK_ARRAY_COUNT(types); i++) {
         SkImageEncoder::Type type = types[i];
         SkAutoDataUnref encoded(create_data_from_bitmap(original, type));
         REPORTER_ASSERT(reporter, encoded.get() != NULL);
         if (NULL == encoded.get()) {
             continue;
         }
         SkBitmap lazy;
         bool installSuccess = install(encoded.get(), &lazy);
         REPORTER_ASSERT(reporter, installSuccess);
         if (!installSuccess) {
             continue;
         }
         REPORTER_ASSERT(reporter, NULL == lazy.getPixels());
         {
             SkAutoLockPixels autoLockPixels(lazy);  // now pixels are good.
             REPORTER_ASSERT(reporter, NULL != lazy.getPixels());
             if (NULL == lazy.getPixels()) {
                 continue;
             }
         }
         // pixels should be gone!
         REPORTER_ASSERT(reporter, NULL == lazy.getPixels());
         {
             SkAutoLockPixels autoLockPixels(lazy);  // now pixels are good.
             REPORTER_ASSERT(reporter, NULL != lazy.getPixels());
             if (NULL == lazy.getPixels()) {
                 continue;
             }
         }
         bool comparePixels = (SkImageEncoder::kPNG_Type == type);
         compare_bitmaps(reporter, original, lazy, comparePixels);
     }
 }

 ////////////////////////////////////////////////////////////////////////////////
 static bool install_skCachingPixelRef(SkData* encoded, SkBitmap* dst) {
     return SkCachingPixelRef::Install(
         SkDecodingImageGenerator::Create(
             encoded, SkDecodingImageGenerator::Options()), dst);
 }
 static bool install_skDiscardablePixelRef(SkData* encoded, SkBitmap* dst) {
     // Use system-default discardable memory.
     return SkInstallDiscardablePixelRef(
         SkDecodingImageGenerator::Create(
             encoded, SkDecodingImageGenerator::Options()), dst);
 }

 ////////////////////////////////////////////////////////////////////////////////
 /**
  *  This checks to see that a SkCachingPixelRef and a
  *  SkDiscardablePixelRef works as advertised with a
  *  SkDecodingImageGenerator.
  */
 DEF_TEST(DecodingImageGenerator, reporter) {
     test_three_encodings(reporter, install_skCachingPixelRef);
     test_three_encodings(reporter, install_skDiscardablePixelRef);
 }

 class TestImageGenerator : public SkImageGenerator {
 public:
     enum TestType {
         kFailGetInfo_TestType,
         kFailGetPixels_TestType,
         kSucceedGetPixels_TestType,
         kLast_TestType = kSucceedGetPixels_TestType
     };
     static int Width() { return 10; }
     static int Height() { return 10; }
     static uint32_t Color() { return 0xff123456; }
     TestImageGenerator(TestType type, skiatest::Reporter* reporter)
         : fType(type), fReporter(reporter) {
         SkASSERT((fType <= kLast_TestType) && (fType >= 0));
     }
     virtual ~TestImageGenerator() { }

 protected:
     virtual bool onGetInfo(SkImageInfo* info) SK_OVERRIDE {
         REPORTER_ASSERT(fReporter, NULL != info);
         if ((NULL == info) || (kFailGetInfo_TestType == fType)) {
             return false;
         }
         info->fWidth = TestImageGenerator::Width();
         info->fHeight = TestImageGenerator::Height();
         info->fColorType = kN32_SkColorType;
         info->fAlphaType = kOpaque_SkAlphaType;
         return true;
     }

     virtual bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
                              SkPMColor ctable[], int* ctableCount) SK_OVERRIDE {
         REPORTER_ASSERT(fReporter, pixels != NULL);
         size_t minRowBytes
             = static_cast<size_t>(info.fWidth * info.bytesPerPixel());
         REPORTER_ASSERT(fReporter, rowBytes >= minRowBytes);
         if ((NULL == pixels)
             || (fType != kSucceedGetPixels_TestType)
             || (info.fColorType != kN32_SkColorType)) {
             return false;
         }
         char* bytePtr = static_cast<char*>(pixels);
         for (int y = 0; y < info.fHeight; ++y) {
             sk_memset32(reinterpret_cast<SkColor*>(bytePtr),
                         TestImageGenerator::Color(), info.fWidth);
             bytePtr += rowBytes;
         }
         return true;
     }

 private:
     const TestType fType;
     skiatest::Reporter* const fReporter;
 };

 static void check_test_image_generator_bitmap(skiatest::Reporter* reporter,
                                               const SkBitmap& bm) {
     REPORTER_ASSERT(reporter, TestImageGenerator::Width() == bm.width());
     REPORTER_ASSERT(reporter, TestImageGenerator::Height() == bm.height());
     SkAutoLockPixels autoLockPixels(bm);
     REPORTER_ASSERT(reporter, NULL != bm.getPixels());
     if (NULL == bm.getPixels()) {
         return;
     }
     int errors = 0;
     for (int y = 0; y < bm.height(); ++y) {
         for (int x = 0; x < bm.width(); ++x) {
             if (TestImageGenerator::Color() != *bm.getAddr32(x, y)) {
                 ++errors;
             }
         }
     }
     REPORTER_ASSERT(reporter, 0 == errors);
 }

 enum PixelRefType {
     kSkCaching_PixelRefType,
     kSkDiscardable_PixelRefType,
     kLast_PixelRefType = kSkDiscardable_PixelRefType
 };

 static void check_pixelref(TestImageGenerator::TestType type,
                            skiatest::Reporter* reporter,
                            PixelRefType pixelRefType,
                            SkDiscardableMemory::Factory* factory) {
     SkASSERT((pixelRefType >= 0) && (pixelRefType <= kLast_PixelRefType));
     SkAutoTDelete<SkImageGenerator> gen(SkNEW_ARGS(TestImageGenerator,
                                                    (type, reporter)));
     REPORTER_ASSERT(reporter, gen.get() != NULL);
     SkBitmap lazy;
     bool success;
     if (kSkCaching_PixelRefType == pixelRefType) {
         // Ignore factory; use global SkScaledImageCache.
         success = SkCachingPixelRef::Install(gen.detach(), &lazy);
     } else {
         success = SkInstallDiscardablePixelRef(gen.detach(), &lazy, factory);
     }
     REPORTER_ASSERT(reporter, success
                     == (TestImageGenerator::kFailGetInfo_TestType != type));
     if (TestImageGenerator::kSucceedGetPixels_TestType == type) {
         check_test_image_generator_bitmap(reporter, lazy);
     } else if (TestImageGenerator::kFailGetPixels_TestType == type) {
         SkAutoLockPixels autoLockPixels(lazy);
         REPORTER_ASSERT(reporter, NULL == lazy.getPixels());
     }
 }

 // new/lock/delete is an odd pattern for a pixelref, but it needs to not assert
 static void test_newlockdelete(skiatest::Reporter* reporter) {
     SkBitmap bm;
     SkImageGenerator* ig = new TestImageGenerator(
         TestImageGenerator::kSucceedGetPixels_TestType, reporter);
     SkInstallDiscardablePixelRef(ig, &bm);
     bm.pixelRef()->lockPixels();
 }

 /**
  *  This tests the basic functionality of SkDiscardablePixelRef with a
  *  basic SkImageGenerator implementation and several
  *  SkDiscardableMemory::Factory choices.
  */
 DEF_TEST(DiscardableAndCachingPixelRef, reporter) {
     test_newlockdelete(reporter);

     check_pixelref(TestImageGenerator::kFailGetInfo_TestType,
                    reporter, kSkCaching_PixelRefType, NULL);
     check_pixelref(TestImageGenerator::kFailGetPixels_TestType,
                    reporter, kSkCaching_PixelRefType, NULL);
     check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
                    reporter, kSkCaching_PixelRefType, NULL);

     check_pixelref(TestImageGenerator::kFailGetInfo_TestType,
                    reporter, kSkDiscardable_PixelRefType, NULL);
     check_pixelref(TestImageGenerator::kFailGetPixels_TestType,
                    reporter, kSkDiscardable_PixelRefType, NULL);
     check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
                    reporter, kSkDiscardable_PixelRefType, NULL);

     SkAutoTUnref<SkDiscardableMemoryPool> pool(
         SkDiscardableMemoryPool::Create(1, NULL));
     REPORTER_ASSERT(reporter, 0 == pool->getRAMUsed());
     check_pixelref(TestImageGenerator::kFailGetPixels_TestType,
                    reporter, kSkDiscardable_PixelRefType, pool);
     REPORTER_ASSERT(reporter, 0 == pool->getRAMUsed());
     check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
                    reporter, kSkDiscardable_PixelRefType, pool);
     REPORTER_ASSERT(reporter, 0 == pool->getRAMUsed());

     SkDiscardableMemoryPool* globalPool = SkGetGlobalDiscardableMemoryPool();
     // Only acts differently from NULL on a platform that has a
     // default discardable memory implementation that differs from the
     // global DM pool.
     check_pixelref(TestImageGenerator::kFailGetPixels_TestType,
                    reporter, kSkDiscardable_PixelRefType, globalPool);
     check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
                    reporter, kSkDiscardable_PixelRefType, globalPool);
 }

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

 DEF_TEST(Image_NewFromGenerator, r) {
     TestImageGenerator::TestType testTypes[] = {
         TestImageGenerator::kFailGetInfo_TestType,
         TestImageGenerator::kFailGetPixels_TestType,
         TestImageGenerator::kSucceedGetPixels_TestType,
     };
     for (size_t i = 0; i < SK_ARRAY_COUNT(testTypes); ++i) {
         TestImageGenerator::TestType test = testTypes[i];
         SkImageGenerator* gen = SkNEW_ARGS(TestImageGenerator, (test, r));
         SkAutoTUnref<SkImage> image(SkImage::NewFromGenerator(gen));
         if (TestImageGenerator::kFailGetInfo_TestType == test) {
             REPORTER_ASSERT(r, NULL == image.get());
             continue;
         }
         if (NULL == image.get()) {
             ERRORF(r, "SkImage::NewFromGenerator unexpecedly failed ["
                    SK_SIZE_T_SPECIFIER "]", i);
             continue;
         }
         REPORTER_ASSERT(r, TestImageGenerator::Width() == image->width());
         REPORTER_ASSERT(r, TestImageGenerator::Height() == image->height());

         SkBitmap bitmap;
         SkAssertResult(bitmap.allocN32Pixels(TestImageGenerator::Width(),
                                              TestImageGenerator::Height()));
         SkCanvas canvas(bitmap);
         const SkColor kDefaultColor = 0xffabcdef;
         canvas.clear(kDefaultColor);
         image->draw(&canvas, 0, 0, NULL);
         if (TestImageGenerator::kSucceedGetPixels_TestType == test) {
             REPORTER_ASSERT(
                     r, TestImageGenerator::Color() == *bitmap.getAddr32(0, 0));
         } else {
             REPORTER_ASSERT(r, kDefaultColor == bitmap.getColor(0,0));
         }
     }
 }
	/*
	* Copyright 2013 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#include "SkBitmap.h"
	#include "SkCachingPixelRef.h"
	#include "SkCanvas.h"
	#include "SkData.h"
	#include "SkDecodingImageGenerator.h"
	#include "SkDiscardableMemoryPool.h"
	#include "SkImageDecoder.h"
	#include "SkImageGeneratorPriv.h"
	#include "SkScaledImageCache.h"
	#include "SkStream.h"
	#include "SkUtils.h"

	#include "Test.h"

	/**
	* Fill this bitmap with some color.
	*/
	static void make_test_image(SkBitmap* bm) {
	const int W = 50, H = 50;
	bm->allocN32Pixels(W, H);
	bm->eraseColor(SK_ColorBLACK);
	SkCanvas canvas(*bm);
	SkPaint paint;
	paint.setColor(SK_ColorBLUE);
	canvas.drawRectCoords(0, 0, SkIntToScalar(W/2),
	SkIntToScalar(H/2), paint);
	paint.setColor(SK_ColorWHITE);
	canvas.drawRectCoords(SkIntToScalar(W/2), SkIntToScalar(H/2),
	SkIntToScalar(W), SkIntToScalar(H), paint);
	}

	/**
	* encode this bitmap into some data via SkImageEncoder
	*/
	static SkData* create_data_from_bitmap(const SkBitmap& bm,
	SkImageEncoder::Type type) {
	SkDynamicMemoryWStream stream;
	if (SkImageEncoder::EncodeStream(&stream, bm, type, 100)) {
	return stream.copyToData();
	}
	return NULL;
	}

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

	static void compare_bitmaps(skiatest::Reporter* reporter,
	const SkBitmap& b1, const SkBitmap& b2,
	bool pixelPerfect = true) {
	REPORTER_ASSERT(reporter, b1.empty() == b2.empty());
	REPORTER_ASSERT(reporter, b1.width() == b2.width());
	REPORTER_ASSERT(reporter, b1.height() == b2.height());
	REPORTER_ASSERT(reporter, b1.isNull() == b2.isNull());
	SkAutoLockPixels autoLockPixels1(b1);
	SkAutoLockPixels autoLockPixels2(b2);
	REPORTER_ASSERT(reporter, b1.isNull() == b2.isNull());
	if (b1.isNull() \|\| b1.empty()) {
	return;
	}
	REPORTER_ASSERT(reporter, NULL != b1.getPixels());
	REPORTER_ASSERT(reporter, NULL != b2.getPixels());
	if ((!(b1.getPixels())) \|\| (!(b2.getPixels()))) {
	return;
	}
	if ((b1.width() != b2.width()) \|\|
	(b1.height() != b2.height())) {
	return;
	}
	if (!pixelPerfect) {
	return;
	}

	int pixelErrors = 0;
	for (int y = 0; y < b2.height(); ++y) {
	for (int x = 0; x < b2.width(); ++x) {
	if (b1.getColor(x, y) != b2.getColor(x, y)) {
	++pixelErrors;
	}
	}
	}
	REPORTER_ASSERT(reporter, 0 == pixelErrors);
	}

	typedef bool (InstallEncoded)(SkData encoded, SkBitmap* dst);

	/**
	This function tests three differently encoded images against the
	original bitmap */
	static void test_three_encodings(skiatest::Reporter* reporter,
	InstallEncoded install) {
	SkBitmap original;
	make_test_image(&original);
	REPORTER_ASSERT(reporter, !original.empty());
	REPORTER_ASSERT(reporter, !original.isNull());
	if (original.empty() \|\| original.isNull()) {
	return;
	}
	static const SkImageEncoder::Type types[] = {
	SkImageEncoder::kPNG_Type,
	SkImageEncoder::kJPEG_Type,
	SkImageEncoder::kWEBP_Type
	};
	for (size_t i = 0; i < SK_ARRAY_COUNT(types); i++) {
	SkImageEncoder::Type type = types[i];
	SkAutoDataUnref encoded(create_data_from_bitmap(original, type));
	REPORTER_ASSERT(reporter, encoded.get() != NULL);
	if (NULL == encoded.get()) {
	continue;
	}
	SkBitmap lazy;
	bool installSuccess = install(encoded.get(), &lazy);
	REPORTER_ASSERT(reporter, installSuccess);
	if (!installSuccess) {
	continue;
	}
	REPORTER_ASSERT(reporter, NULL == lazy.getPixels());
	{
	SkAutoLockPixels autoLockPixels(lazy); // now pixels are good.
	REPORTER_ASSERT(reporter, NULL != lazy.getPixels());
	if (NULL == lazy.getPixels()) {
	continue;
	}
	}
	// pixels should be gone!
	REPORTER_ASSERT(reporter, NULL == lazy.getPixels());
	{
	SkAutoLockPixels autoLockPixels(lazy); // now pixels are good.
	REPORTER_ASSERT(reporter, NULL != lazy.getPixels());
	if (NULL == lazy.getPixels()) {
	continue;
	}
	}
	bool comparePixels = (SkImageEncoder::kPNG_Type == type);
	compare_bitmaps(reporter, original, lazy, comparePixels);
	}
	}

	////////////////////////////////////////////////////////////////////////////////
	static bool install_skCachingPixelRef(SkData* encoded, SkBitmap* dst) {
	return SkCachingPixelRef::Install(
	SkDecodingImageGenerator::Create(
	encoded, SkDecodingImageGenerator::Options()), dst);
	}
	static bool install_skDiscardablePixelRef(SkData* encoded, SkBitmap* dst) {
	// Use system-default discardable memory.
	return SkInstallDiscardablePixelRef(
	SkDecodingImageGenerator::Create(
	encoded, SkDecodingImageGenerator::Options()), dst);
	}

	////////////////////////////////////////////////////////////////////////////////
	/**
	* This checks to see that a SkCachingPixelRef and a
	* SkDiscardablePixelRef works as advertised with a
	* SkDecodingImageGenerator.
	*/
	DEF_TEST(DecodingImageGenerator, reporter) {
	test_three_encodings(reporter, install_skCachingPixelRef);
	test_three_encodings(reporter, install_skDiscardablePixelRef);
	}

	class TestImageGenerator : public SkImageGenerator {
	public:
	enum TestType {
	kFailGetInfo_TestType,
	kFailGetPixels_TestType,
	kSucceedGetPixels_TestType,
	kLast_TestType = kSucceedGetPixels_TestType
	};
	static int Width() { return 10; }
	static int Height() { return 10; }
	static uint32_t Color() { return 0xff123456; }
	TestImageGenerator(TestType type, skiatest::Reporter* reporter)
	: fType(type), fReporter(reporter) {
	SkASSERT((fType <= kLast_TestType) && (fType >= 0));
	}
	virtual ~TestImageGenerator() { }

	protected:
	virtual bool onGetInfo(SkImageInfo* info) SK_OVERRIDE {
	REPORTER_ASSERT(fReporter, NULL != info);
	if ((NULL == info) \|\| (kFailGetInfo_TestType == fType)) {
	return false;
	}
	info->fWidth = TestImageGenerator::Width();
	info->fHeight = TestImageGenerator::Height();
	info->fColorType = kN32_SkColorType;
	info->fAlphaType = kOpaque_SkAlphaType;
	return true;
	}

	virtual bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
	SkPMColor ctable[], int* ctableCount) SK_OVERRIDE {
	REPORTER_ASSERT(fReporter, pixels != NULL);
	size_t minRowBytes
	= static_cast<size_t>(info.fWidth * info.bytesPerPixel());
	REPORTER_ASSERT(fReporter, rowBytes >= minRowBytes);
	if ((NULL == pixels)
	\|\| (fType != kSucceedGetPixels_TestType)
	\|\| (info.fColorType != kN32_SkColorType)) {
	return false;
	}
	char* bytePtr = static_cast<char*>(pixels);
	for (int y = 0; y < info.fHeight; ++y) {
	sk_memset32(reinterpret_cast<SkColor*>(bytePtr),
	TestImageGenerator::Color(), info.fWidth);
	bytePtr += rowBytes;
	}
	return true;
	}

	private:
	const TestType fType;
	skiatest::Reporter* const fReporter;
	};

	static void check_test_image_generator_bitmap(skiatest::Reporter* reporter,
	const SkBitmap& bm) {
	REPORTER_ASSERT(reporter, TestImageGenerator::Width() == bm.width());
	REPORTER_ASSERT(reporter, TestImageGenerator::Height() == bm.height());
	SkAutoLockPixels autoLockPixels(bm);
	REPORTER_ASSERT(reporter, NULL != bm.getPixels());
	if (NULL == bm.getPixels()) {
	return;
	}
	int errors = 0;
	for (int y = 0; y < bm.height(); ++y) {
	for (int x = 0; x < bm.width(); ++x) {
	if (TestImageGenerator::Color() != *bm.getAddr32(x, y)) {
	++errors;
	}
	}
	}
	REPORTER_ASSERT(reporter, 0 == errors);
	}

	enum PixelRefType {
	kSkCaching_PixelRefType,
	kSkDiscardable_PixelRefType,
	kLast_PixelRefType = kSkDiscardable_PixelRefType
	};

	static void check_pixelref(TestImageGenerator::TestType type,
	skiatest::Reporter* reporter,
	PixelRefType pixelRefType,
	SkDiscardableMemory::Factory* factory) {
	SkASSERT((pixelRefType >= 0) && (pixelRefType <= kLast_PixelRefType));
	SkAutoTDelete<SkImageGenerator> gen(SkNEW_ARGS(TestImageGenerator,
	(type, reporter)));
	REPORTER_ASSERT(reporter, gen.get() != NULL);
	SkBitmap lazy;
	bool success;
	if (kSkCaching_PixelRefType == pixelRefType) {
	// Ignore factory; use global SkScaledImageCache.
	success = SkCachingPixelRef::Install(gen.detach(), &lazy);
	} else {
	success = SkInstallDiscardablePixelRef(gen.detach(), &lazy, factory);
	}
	REPORTER_ASSERT(reporter, success
	== (TestImageGenerator::kFailGetInfo_TestType != type));
	if (TestImageGenerator::kSucceedGetPixels_TestType == type) {
	check_test_image_generator_bitmap(reporter, lazy);
	} else if (TestImageGenerator::kFailGetPixels_TestType == type) {
	SkAutoLockPixels autoLockPixels(lazy);
	REPORTER_ASSERT(reporter, NULL == lazy.getPixels());
	}
	}

	// new/lock/delete is an odd pattern for a pixelref, but it needs to not assert
	static void test_newlockdelete(skiatest::Reporter* reporter) {
	SkBitmap bm;
	SkImageGenerator* ig = new TestImageGenerator(
	TestImageGenerator::kSucceedGetPixels_TestType, reporter);
	SkInstallDiscardablePixelRef(ig, &bm);
	bm.pixelRef()->lockPixels();
	}

	/**
	* This tests the basic functionality of SkDiscardablePixelRef with a
	* basic SkImageGenerator implementation and several
	* SkDiscardableMemory::Factory choices.
	*/
	DEF_TEST(DiscardableAndCachingPixelRef, reporter) {
	test_newlockdelete(reporter);

	check_pixelref(TestImageGenerator::kFailGetInfo_TestType,
	reporter, kSkCaching_PixelRefType, NULL);
	check_pixelref(TestImageGenerator::kFailGetPixels_TestType,
	reporter, kSkCaching_PixelRefType, NULL);
	check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
	reporter, kSkCaching_PixelRefType, NULL);

	check_pixelref(TestImageGenerator::kFailGetInfo_TestType,
	reporter, kSkDiscardable_PixelRefType, NULL);
	check_pixelref(TestImageGenerator::kFailGetPixels_TestType,
	reporter, kSkDiscardable_PixelRefType, NULL);
	check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
	reporter, kSkDiscardable_PixelRefType, NULL);

	SkAutoTUnref<SkDiscardableMemoryPool> pool(
	SkDiscardableMemoryPool::Create(1, NULL));
	REPORTER_ASSERT(reporter, 0 == pool->getRAMUsed());
	check_pixelref(TestImageGenerator::kFailGetPixels_TestType,
	reporter, kSkDiscardable_PixelRefType, pool);
	REPORTER_ASSERT(reporter, 0 == pool->getRAMUsed());
	check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
	reporter, kSkDiscardable_PixelRefType, pool);
	REPORTER_ASSERT(reporter, 0 == pool->getRAMUsed());

	SkDiscardableMemoryPool* globalPool = SkGetGlobalDiscardableMemoryPool();
	// Only acts differently from NULL on a platform that has a
	// default discardable memory implementation that differs from the
	// global DM pool.
	check_pixelref(TestImageGenerator::kFailGetPixels_TestType,
	reporter, kSkDiscardable_PixelRefType, globalPool);
	check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
	reporter, kSkDiscardable_PixelRefType, globalPool);
	}

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

	DEF_TEST(Image_NewFromGenerator, r) {
	TestImageGenerator::TestType testTypes[] = {
	TestImageGenerator::kFailGetInfo_TestType,
	TestImageGenerator::kFailGetPixels_TestType,
	TestImageGenerator::kSucceedGetPixels_TestType,
	};
	for (size_t i = 0; i < SK_ARRAY_COUNT(testTypes); ++i) {
	TestImageGenerator::TestType test = testTypes[i];
	SkImageGenerator* gen = SkNEW_ARGS(TestImageGenerator, (test, r));
	SkAutoTUnref<SkImage> image(SkImage::NewFromGenerator(gen));
	if (TestImageGenerator::kFailGetInfo_TestType == test) {
	REPORTER_ASSERT(r, NULL == image.get());
	continue;
	}
	if (NULL == image.get()) {
	ERRORF(r, "SkImage::NewFromGenerator unexpecedly failed ["
	SK_SIZE_T_SPECIFIER "]", i);
	continue;
	}
	REPORTER_ASSERT(r, TestImageGenerator::Width() == image->width());
	REPORTER_ASSERT(r, TestImageGenerator::Height() == image->height());

	SkBitmap bitmap;
	SkAssertResult(bitmap.allocN32Pixels(TestImageGenerator::Width(),
	TestImageGenerator::Height()));
	SkCanvas canvas(bitmap);
	const SkColor kDefaultColor = 0xffabcdef;
	canvas.clear(kDefaultColor);
	image->draw(&canvas, 0, 0, NULL);
	if (TestImageGenerator::kSucceedGetPixels_TestType == test) {
	REPORTER_ASSERT(
	r, TestImageGenerator::Color() == *bitmap.getAddr32(0, 0));
	} else {
	REPORTER_ASSERT(r, kDefaultColor == bitmap.getColor(0,0));
	}
	}
	}