GIF decoding to Index8, unit tests and misusing unit test as benchmark

third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoderTest.cpp

Index: third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoderTest.cpp
diff --git a/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoderTest.cpp b/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoderTest.cpp
index b7a206a1b9e97a445235c2f6904c01c5a8e3feb8..6695f0dc90159be58f913c63afa62b11ef1b09d2 100644
--- a/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoderTest.cpp
+++ b/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoderTest.cpp
@@ -48,19 +48,55 @@ const char decodersTestingDir[] = "Source/platform/image-decoders/testing";
 const char layoutTestResourcesDir[] = "LayoutTests/fast/images/resources";
 const char webTestsDataDir[] = "Source/web/tests/data";
 
-PassOwnPtr<ImageDecoder> createDecoder()
+#define LOOP_DECODERS_BEGIN \
+    DecoderCreator decoderCreators[2] = { &createDecoderN32, &createDecoderIndex8 }; \
+    for (DecoderCreator createDecoder : decoderCreators) {
+
+#define LOOP_DECODERS_END \
+    }
+
+PassOwnPtr<ImageDecoder> createDecoderN32()
+{
+    return adoptPtr(new GIFImageDecoder(ImageDecoder::AlphaNotPremultiplied, ImageDecoder::GammaAndColorProfileApplied, ImageDecoder::noDecodedImageByteLimit, ImageFrame::N32));
+}
+
+PassOwnPtr<ImageDecoder> createDecoderIndex8()
 {
-    return adoptPtr(new GIFImageDecoder(ImageDecoder::AlphaNotPremultiplied, ImageDecoder::GammaAndColorProfileApplied, ImageDecoder::noDecodedImageByteLimit));
+    return adoptPtr(new GIFImageDecoder(ImageDecoder::AlphaNotPremultiplied, ImageDecoder::GammaAndColorProfileApplied, ImageDecoder::noDecodedImageByteLimit, ImageFrame::Index8));
+}
+
+static bool areFramesColorsEqual(ImageFrame* b1, ImageFrame* b2)
+{
+    // The same premultiply alpha should be set.
+    if (b1->premultiplyAlpha() != b2->premultiplyAlpha())
+        return false;
+    if (b1->getSkBitmap().width() != b2->getSkBitmap().width()
+        || b1->getSkBitmap().height() != b2->getSkBitmap().height())
+        return false;
+
+    int width = b1->getSkBitmap().width();
+    int height = b1->getSkBitmap().height();
+    for (int j = 0; j < height; ++j) {
+        for (int i = 0; i < width; ++i) {
+            uint32_t c1 = b1->getSkBitmap().getColor(i, j);
+            uint32_t c2 = b2->getSkBitmap().getColor(i, j);
+            if (c1 != c2) {
+                return false;
+            }
+        }
+    }
+    return true;
 }
 
 void testRandomFrameDecode(const char* dir, const char* gifFile)
 {
+    LOOP_DECODERS_BEGIN
     SCOPED_TRACE(gifFile);
 
     RefPtr<SharedBuffer> fullData = readFile(dir, gifFile);
     ASSERT_TRUE(fullData.get());
     Vector<unsigned> baselineHashes;
-    createDecodingBaseline(&createDecoder, fullData.get(), &baselineHashes);
+    createDecodingBaseline(createDecoder, fullData.get(), &baselineHashes);
     size_t frameCount = baselineHashes.size();
 
     // Random decoding should get the same results as sequential decoding.
@@ -83,19 +119,25 @@ void testRandomFrameDecode(const char* dir, const char* gifFile)
         ImageFrame* frame = decoder->frameBufferAtIndex(i - 1);
         EXPECT_EQ(baselineHashes[i - 1], hashBitmap(frame->getSkBitmap()));
     }
+    LOOP_DECODERS_END
 }
 
-void testRandomDecodeAfterClearFrameBufferCache(const char* dir, const char* gifFile)
+void testRandomDecodeAfterClearFrameBufferCache(const char* dir, const char* gifFile, ImageFrame::ColorType targetType = ImageFrame::N32)
 {
     SCOPED_TRACE(gifFile);
 
     RefPtr<SharedBuffer> data = readFile(dir, gifFile);
     ASSERT_TRUE(data.get());
     Vector<unsigned> baselineHashes;
-    createDecodingBaseline(&createDecoder, data.get(), &baselineHashes);
+    DecoderCreator decoderCreator = &createDecoderIndex8;
+    if (targetType == ImageFrame::N32) {
+        decoderCreator = &createDecoderN32;
+    }
+    createDecodingBaseline(decoderCreator, data.get(), &baselineHashes);
+
     size_t frameCount = baselineHashes.size();
 
-    OwnPtr<ImageDecoder> decoder = createDecoder();
+    OwnPtr<ImageDecoder> decoder = decoderCreator();
     decoder->setData(data.get(), true);
     for (size_t clearExceptFrame = 0; clearExceptFrame < frameCount; ++clearExceptFrame) {
         decoder->clearCacheExceptFrame(clearExceptFrame);
@@ -103,8 +145,84 @@ void testRandomDecodeAfterClearFrameBufferCache(const char* dir, const char* gif
         for (size_t i = 0; i < skippingStep; ++i) {
             for (size_t j = 0; j < frameCount; j += skippingStep) {
                 SCOPED_TRACE(testing::Message() << "Random i:" << i << " j:" << j);
+                bool canDecodeToIndex8 = decoder->canDecodeTo(j, ImageFrame::Index8);
+                ImageFrame* frame = decoder->frameBufferAtIndex(j);
+                EXPECT_EQ(baselineHashes[j], hashBitmap(frame->getSkBitmap()));
+                EXPECT_EQ(canDecodeToIndex8, frame->getSkBitmap().colorType() == kIndex_8_SkColorType);
+            }
+        }
+    }
+}
+
+void testRandomFrameDecodeCompare(const char* dir, const char* gifFile)
+{
+    SCOPED_TRACE(gifFile);
+
+    RefPtr<SharedBuffer> fullData = readFile(dir, gifFile);
+    ASSERT_TRUE(fullData.get());
+    Vector<unsigned> baselineHashes;
+    createDecodingBaseline(&createDecoderN32, fullData.get(), &baselineHashes);
+    size_t frameCount = baselineHashes.size();
+
+    // Random decoding should get the same results as sequential decoding.
+    OwnPtr<ImageDecoder> decoder = createDecoderN32();
+    // Test Index8 and RGBA through the same scenario.
+    OwnPtr<ImageDecoder> decoderI8 = createDecoderIndex8();
+
+    decoder->setData(fullData.get(), true);
+    decoderI8->setData(fullData.get(), true);
+    const size_t skippingStep = 5;
+    for (size_t i = 0; i < skippingStep; ++i) {
+        for (size_t j = i; j < frameCount; j += skippingStep) {
+            SCOPED_TRACE(testing::Message() << "Random i:" << i << " j:" << j);
+            ImageFrame* frame = decoder->frameBufferAtIndex(j);
+            EXPECT_EQ(baselineHashes[j], hashBitmap(frame->getSkBitmap()));
+            ImageFrame* frameI8 = decoderI8->frameBufferAtIndex(j);
+            ASSERT_TRUE(areFramesColorsEqual(frame, frameI8));
+        }
+    }
+
+    // Decoding in reverse order.
+    decoder = createDecoderN32();
+    decoderI8 = createDecoderIndex8();
+    decoder->setData(fullData.get(), true);
+    decoderI8->setData(fullData.get(), true);
+    for (size_t i = frameCount; i; --i) {
+        SCOPED_TRACE(testing::Message() << "Reverse i:" << i);
+        ImageFrame* frame = decoder->frameBufferAtIndex(i - 1);
+        EXPECT_EQ(baselineHashes[i - 1], hashBitmap(frame->getSkBitmap()));
+        ImageFrame* frameI8 = decoderI8->frameBufferAtIndex(i - 1);
+        ASSERT_TRUE(areFramesColorsEqual(frame, frameI8));
+    }
+}
+
+void testRandomDecodeAfterClearFrameBufferCacheCompare(const char* dir, const char* gifFile)
+{
+    SCOPED_TRACE(gifFile);
+
+    RefPtr<SharedBuffer> data = readFile(dir, gifFile);
+    ASSERT_TRUE(data.get());
+    Vector<unsigned> baselineHashes;
+    createDecodingBaseline(&createDecoderN32, data.get(), &baselineHashes);
+    size_t frameCount = baselineHashes.size();
+
+    OwnPtr<ImageDecoder> decoder = createDecoderN32();
+    // Test Index8 and RGBA through the same scenario and compare pixels.
+    OwnPtr<ImageDecoder> decoderI8 = createDecoderIndex8();
+
+    decoder->setData(data.get(), true);
+    decoderI8->setData(data.get(), true);
+    for (size_t clearExceptFrame = 0; clearExceptFrame < frameCount; ++clearExceptFrame) {
+        decoder->clearCacheExceptFrame(clearExceptFrame);
+        decoderI8->clearCacheExceptFrame(clearExceptFrame);
+        const size_t skippingStep = 5;
+        for (size_t i = 0; i < skippingStep; ++i) {
+            for (size_t j = 0; j < frameCount; j += (i + 2)) {
+                SCOPED_TRACE(testing::Message() << "Random i:" << i << " j:" << j);
                 ImageFrame* frame = decoder->frameBufferAtIndex(j);
                 EXPECT_EQ(baselineHashes[j], hashBitmap(frame->getSkBitmap()));
+                ImageFrame* frameI8 = decoderI8->frameBufferAtIndex(j);
+                ASSERT_TRUE(areFramesColorsEqual(frame, frameI8));
             }
         }
     }
@@ -114,11 +232,13 @@ void testRandomDecodeAfterClearFrameBufferCache(const char* dir, const char* gif
 
 TEST(GIFImageDecoderTest, decodeTwoFrames)
 {
-    OwnPtr<ImageDecoder> decoder = createDecoder();
+    OwnPtr<ImageDecoder> decoder = createDecoderN32();
+    OwnPtr<ImageDecoder> decoderI8 = createDecoderIndex8();
 
     RefPtr<SharedBuffer> data = readFile(layoutTestResourcesDir, "animated.gif");
     ASSERT_TRUE(data.get());
     decoder->setData(data.get(), true);
+    decoderI8->setData(data.get(), true);
     EXPECT_EQ(cAnimationLoopOnce, decoder->repetitionCount());
 
     ImageFrame* frame = decoder->frameBufferAtIndex(0);
@@ -127,6 +247,14 @@ TEST(GIFImageDecoderTest, decodeTwoFrames)
     EXPECT_EQ(16, frame->getSkBitmap().width());
     EXPECT_EQ(16, frame->getSkBitmap().height());
 
+    ImageFrame* frameI8 = decoderI8->frameBufferAtIndex(0);
+    generationID0 = frameI8->getSkBitmap().getGenerationID();
+    EXPECT_EQ(ImageFrame::FrameComplete, frameI8->status());
+    EXPECT_EQ(16, frameI8->getSkBitmap().width());
+    EXPECT_EQ(16, frameI8->getSkBitmap().height());
+
+    ASSERT_TRUE(areFramesColorsEqual(frame, frameI8));
+
     frame = decoder->frameBufferAtIndex(1);
     uint32_t generationID1 = frame->getSkBitmap().getGenerationID();
     EXPECT_EQ(ImageFrame::FrameComplete, frame->status());
@@ -136,10 +264,16 @@ TEST(GIFImageDecoderTest, decodeTwoFrames)
 
     EXPECT_EQ(2u, decoder->frameCount());
     EXPECT_EQ(cAnimationLoopInfinite, decoder->repetitionCount());
+
+    frameI8 = decoderI8->frameBufferAtIndex(1);
+    ASSERT_TRUE(areFramesColorsEqual(frame, frameI8));
+    EXPECT_EQ(2u, decoderI8->frameCount());
+    EXPECT_EQ(cAnimationLoopInfinite, decoderI8->repetitionCount());
 }
 
 TEST(GIFImageDecoderTest, parseAndDecode)
 {
+    LOOP_DECODERS_BEGIN
     OwnPtr<ImageDecoder> decoder = createDecoder();
 
     RefPtr<SharedBuffer> data = readFile(layoutTestResourcesDir, "animated.gif");
@@ -160,11 +294,13 @@ TEST(GIFImageDecoderTest, parseAndDecode)
     EXPECT_EQ(16, frame->getSkBitmap().width());
     EXPECT_EQ(16, frame->getSkBitmap().height());
     EXPECT_EQ(cAnimationLoopInfinite, decoder->repetitionCount());
+    LOOP_DECODERS_END
 }
 
 TEST(GIFImageDecoderTest, parseByteByByte)
 {
-    OwnPtr<ImageDecoder> decoder = createDecoder();
+    OwnPtr<ImageDecoder> decoder = createDecoderN32();
+    OwnPtr<ImageDecoder> decoderI8 = createDecoderIndex8();
 
     RefPtr<SharedBuffer> data = readFile(layoutTestResourcesDir, "animated.gif");
     ASSERT_TRUE(data.get());
@@ -175,8 +311,11 @@ TEST(GIFImageDecoderTest, parseByteByByte)
     for (size_t length = 1; length <= data->size(); ++length) {
         RefPtr<SharedBuffer> tempData = SharedBuffer::create(data->data(), length);
         decoder->setData(tempData.get(), length == data->size());
+        decoderI8->setData(tempData.get(), length == data->size());
 
         EXPECT_LE(frameCount, decoder->frameCount());
+        EXPECT_LE(frameCount, decoderI8->frameCount());
+        EXPECT_EQ(decoder->frameCount(), decoderI8->frameCount());
         frameCount = decoder->frameCount();
     }
 
@@ -189,7 +328,8 @@ TEST(GIFImageDecoderTest, parseByteByByte)
 
 TEST(GIFImageDecoderTest, parseAndDecodeByteByByte)
 {
-    OwnPtr<ImageDecoder> decoder = createDecoder();
+    OwnPtr<ImageDecoder> decoder = createDecoderN32();
+    OwnPtr<ImageDecoder> decoderI8 = createDecoderIndex8();
 
     RefPtr<SharedBuffer> data = readFile(layoutTestResourcesDir, "animated-gif-with-offsets.gif");
     ASSERT_TRUE(data.get());
@@ -201,13 +341,18 @@ TEST(GIFImageDecoderTest, parseAndDecodeByteByByte)
     for (size_t length = 1; length <= data->size(); ++length) {
         RefPtr<SharedBuffer> tempData = SharedBuffer::create(data->data(), length);
         decoder->setData(tempData.get(), length == data->size());
+        decoderI8->setData(tempData.get(), length == data->size());
 
         EXPECT_LE(frameCount, decoder->frameCount());
         frameCount = decoder->frameCount();
+        EXPECT_EQ(frameCount, decoderI8->frameCount());
 
         ImageFrame* frame = decoder->frameBufferAtIndex(frameCount - 1);
         if (frame && frame->status() == ImageFrame::FrameComplete && framesDecoded < frameCount)
             ++framesDecoded;
+
+        ImageFrame* frameI8 = decoderI8->frameBufferAtIndex(frameCount - 1);
+        ASSERT_TRUE(!(frame || frameI8) || areFramesColorsEqual(frame, frameI8));
     }
 
     EXPECT_EQ(5u, decoder->frameCount());
@@ -217,6 +362,7 @@ TEST(GIFImageDecoderTest, parseAndDecodeByteByByte)
 
 TEST(GIFImageDecoderTest, brokenSecondFrame)
 {
+    LOOP_DECODERS_BEGIN
     OwnPtr<ImageDecoder> decoder = createDecoder();
 
     RefPtr<SharedBuffer> data = readFile(webTestsDataDir, "broken.gif");
@@ -227,10 +373,12 @@ TEST(GIFImageDecoderTest, brokenSecondFrame)
     EXPECT_EQ(1u, decoder->frameCount());
     ImageFrame* frame = decoder->frameBufferAtIndex(1);
     EXPECT_FALSE(frame);
+    LOOP_DECODERS_END
 }
 
 TEST(GIFImageDecoderTest, progressiveDecode)
 {
+    LOOP_DECODERS_BEGIN
     RefPtr<SharedBuffer> fullData = readFile(webTestsDataDir, "radient.gif");
     ASSERT_TRUE(fullData.get());
     const size_t fullLength = fullData->size();
@@ -278,10 +426,12 @@ TEST(GIFImageDecoderTest, progressiveDecode)
         }
     }
     EXPECT_TRUE(match);
+    LOOP_DECODERS_END
 }
 
 TEST(GIFImageDecoderTest, allDataReceivedTruncation)
 {
+    LOOP_DECODERS_BEGIN
     OwnPtr<ImageDecoder> decoder = createDecoder();
 
     RefPtr<SharedBuffer> data = readFile(layoutTestResourcesDir, "animated.gif");
@@ -298,10 +448,12 @@ TEST(GIFImageDecoderTest, allDataReceivedTruncation)
     EXPECT_FALSE(decoder->failed());
     decoder->frameBufferAtIndex(1);
     EXPECT_TRUE(decoder->failed());
+    LOOP_DECODERS_END
 }
 
 TEST(GIFImageDecoderTest, frameIsComplete)
 {
+    LOOP_DECODERS_BEGIN
     OwnPtr<ImageDecoder> decoder = createDecoder();
 
     RefPtr<SharedBuffer> data = readFile(layoutTestResourcesDir, "animated.gif");
@@ -313,10 +465,12 @@ TEST(GIFImageDecoderTest, frameIsComplete)
     EXPECT_TRUE(decoder->frameIsCompleteAtIndex(0));
     EXPECT_TRUE(decoder->frameIsCompleteAtIndex(1));
     EXPECT_EQ(cAnimationLoopInfinite, decoder->repetitionCount());
+    LOOP_DECODERS_END
 }
 
 TEST(GIFImageDecoderTest, frameIsCompleteLoading)
 {
+    LOOP_DECODERS_BEGIN
     OwnPtr<ImageDecoder> decoder = createDecoder();
 
     RefPtr<SharedBuffer> data = readFile(layoutTestResourcesDir, "animated.gif");
@@ -335,10 +489,12 @@ TEST(GIFImageDecoderTest, frameIsCompleteLoading)
     EXPECT_EQ(2u, decoder->frameCount());
     EXPECT_TRUE(decoder->frameIsCompleteAtIndex(0));
     EXPECT_TRUE(decoder->frameIsCompleteAtIndex(1));
+    LOOP_DECODERS_END
 }
 
 TEST(GIFImageDecoderTest, badTerminator)
 {
+    LOOP_DECODERS_BEGIN
     RefPtr<SharedBuffer> referenceData = readFile(webTestsDataDir, "radient.gif");
     RefPtr<SharedBuffer> testData = readFile(webTestsDataDir, "radient-bad-terminator.gif");
     ASSERT_TRUE(referenceData.get());
@@ -357,10 +513,12 @@ TEST(GIFImageDecoderTest, badTerminator)
     ASSERT(testFrame);
 
     EXPECT_EQ(hashBitmap(referenceFrame->getSkBitmap()), hashBitmap(testFrame->getSkBitmap()));
+    LOOP_DECODERS_END
 }
 
 TEST(GIFImageDecoderTest, updateRequiredPreviousFrameAfterFirstDecode)
 {
+    LOOP_DECODERS_BEGIN
     OwnPtr<ImageDecoder> decoder = createDecoder();
 
     RefPtr<SharedBuffer> fullData = readFile(layoutTestResourcesDir, "animated-10color.gif");
@@ -383,6 +541,7 @@ TEST(GIFImageDecoderTest, updateRequiredPreviousFrameAfterFirstDecode)
     decoder->setData(fullData.get(), true);
     for (size_t i = 0; i < frameCount; ++i)
         EXPECT_EQ(kNotFound, decoder->frameBufferAtIndex(i)->requiredPreviousFrameIndex());
+    LOOP_DECODERS_END
 }
 
 TEST(GIFImageDecoderTest, randomFrameDecode)
@@ -394,6 +553,15 @@ TEST(GIFImageDecoderTest, randomFrameDecode)
     testRandomFrameDecode(layoutTestResourcesDir, "animated-10color.gif");
 }
 
+TEST(GIFImageDecoderTest, randomFrameDecodeCompare)
+{
+    // Single frame image.
+    testRandomFrameDecodeCompare(webTestsDataDir, "radient.gif");
+    // Multiple frame images.
+    testRandomFrameDecodeCompare(layoutTestResourcesDir, "animated-gif-with-offsets.gif");
+    testRandomFrameDecodeCompare(layoutTestResourcesDir, "animated-10color.gif");
+}
+
 TEST(GIFImageDecoderTest, randomDecodeAfterClearFrameBufferCache)
 {
     // Single frame image.
@@ -403,12 +571,23 @@ TEST(GIFImageDecoderTest, randomDecodeAfterClearFrameBufferCache)
     testRandomDecodeAfterClearFrameBufferCache(layoutTestResourcesDir, "animated-10color.gif");
 }
 
+TEST(GIFImageDecoderTest, randomDecodeAfterClearFrameBufferCacheCompare)
+{
+    // Single frame image.
+    testRandomDecodeAfterClearFrameBufferCacheCompare(webTestsDataDir, "radient.gif");
+    // Multiple frame images with offset. All frames depend to frame 0.
+    testRandomDecodeAfterClearFrameBufferCacheCompare(layoutTestResourcesDir, "animated-gif-with-offsets.gif");
+    testRandomDecodeAfterClearFrameBufferCacheCompare(layoutTestResourcesDir, "animated-10color.gif");
+}
+
 TEST(GIFImageDecoderTest, resumePartialDecodeAfterClearFrameBufferCache)
 {
     RefPtr<SharedBuffer> fullData = readFile(layoutTestResourcesDir, "animated-10color.gif");
     ASSERT_TRUE(fullData.get());
+
+    LOOP_DECODERS_BEGIN
     Vector<unsigned> baselineHashes;
-    createDecodingBaseline(&createDecoder, fullData.get(), &baselineHashes);
+    createDecodingBaseline(createDecoder, fullData.get(), &baselineHashes);
     size_t frameCount = baselineHashes.size();
 
     OwnPtr<ImageDecoder> decoder = createDecoder();
@@ -432,6 +611,7 @@ TEST(GIFImageDecoderTest, resumePartialDecodeAfterClearFrameBufferCache)
     ImageFrame* firstFrame = decoder->frameBufferAtIndex(0);
     EXPECT_EQ(ImageFrame::FrameComplete, firstFrame->status());
     EXPECT_EQ(baselineHashes[0], hashBitmap(firstFrame->getSkBitmap()));
+    LOOP_DECODERS_END
 }
 
 // The first LZW codes in the image are invalid values that try to create a loop
@@ -441,11 +621,13 @@ TEST(GIFImageDecoderTest, badInitialCode)
     RefPtr<SharedBuffer> testData = readFile(decodersTestingDir, "bad-initial-code.gif");
     ASSERT_TRUE(testData.get());
 
+    LOOP_DECODERS_BEGIN
     OwnPtr<ImageDecoder> testDecoder = createDecoder();
     testDecoder->setData(testData.get(), true);
     EXPECT_EQ(1u, testDecoder->frameCount());
     ASSERT_TRUE(testDecoder->frameBufferAtIndex(0));
     EXPECT_TRUE(testDecoder->failed());
+    LOOP_DECODERS_END
 }
 
 // The image has an invalid LZW code that exceeds dictionary size. Decoding should fail.
@@ -454,15 +636,18 @@ TEST(GIFImageDecoderTest, badCode)
     RefPtr<SharedBuffer> testData = readFile(decodersTestingDir, "bad-code.gif");
     ASSERT_TRUE(testData.get());
 
+    LOOP_DECODERS_BEGIN
     OwnPtr<ImageDecoder> testDecoder = createDecoder();
     testDecoder->setData(testData.get(), true);
     EXPECT_EQ(1u, testDecoder->frameCount());
     ASSERT_TRUE(testDecoder->frameBufferAtIndex(0));
     EXPECT_TRUE(testDecoder->failed());
+    LOOP_DECODERS_END
 }
 
 TEST(GIFImageDecoderTest, invalidDisposalMethod)
 {
+    LOOP_DECODERS_BEGIN
     OwnPtr<ImageDecoder> decoder = createDecoder();
 
     // The image has 2 frames, with disposal method 4 and 5, respectively.
@@ -475,13 +660,14 @@ TEST(GIFImageDecoderTest, invalidDisposalMethod)
     EXPECT_EQ(ImageFrame::DisposeOverwritePrevious, decoder->frameBufferAtIndex(0)->disposalMethod());
     // Disposal method 5 is ignored.
     EXPECT_EQ(ImageFrame::DisposeNotSpecified, decoder->frameBufferAtIndex(1)->disposalMethod());
+    LOOP_DECODERS_END
 }
 
 TEST(GIFImageDecoderTest, firstFrameHasGreaterSizeThanScreenSize)
 {
     RefPtr<SharedBuffer> fullData = readFile(decodersTestingDir, "first-frame-has-greater-size-than-screen-size.gif");
     ASSERT_TRUE(fullData.get());
-
+    LOOP_DECODERS_BEGIN
     OwnPtr<ImageDecoder> decoder;
     IntSize frameSize;
 
@@ -499,6 +685,33 @@ TEST(GIFImageDecoderTest, firstFrameHasGreaterSizeThanScreenSize)
         ASSERT_EQ(frameSize.width(), decoder->decodedSize().width());
         ASSERT_EQ(frameSize.height(), decoder->decodedSize().height());
     }
+    LOOP_DECODERS_END
 }
 
+// FIXME following benchmarks need to be removed before submitting.
+#define BENCHMARK_DECODE(dir, file, title, count)\
+TEST(GIFImageDecoderTest, tempBench_decodeIndex8##title##warmuprun)\
+{\
+    testRandomDecodeAfterClearFrameBufferCache(dir, file);\
+}\
+TEST(GIFImageDecoderTest, tempBench_decodeN32##title##_x##count) \
+{\
+    for (int i = 0; i < count; ++i)\
+        testRandomDecodeAfterClearFrameBufferCache(dir, file);\
+}\
+\
+TEST(GIFImageDecoderTest, tempBench_decodeIndex8##title##_x##count)\
+{\
+    for (int i = 0; i < count; ++i)\
+        testRandomDecodeAfterClearFrameBufferCache(dir, file, ImageFrame::Index8);\
+}\
+
+BENCHMARK_DECODE(layoutTestResourcesDir, "animated-10color.gif", animated_10color_gif, 5)
+BENCHMARK_DECODE(webTestsDataDir, "radient.gif", radient_gif, 10)
+BENCHMARK_DECODE(layoutTestResourcesDir, "animated-gif-with-offsets.gif", animated_gif_with_offsets_gif, 5)
+BENCHMARK_DECODE(layoutTestResourcesDir, "animated.gif", animated_gif, 10)
+BENCHMARK_DECODE(layoutTestResourcesDir, "quicksort.gif", quicksort_gif, 5)
+BENCHMARK_DECODE(layoutTestResourcesDir, "large-gif-checkerboard.gif", large_gif_checkerboard_gif, 5)
+BENCHMARK_DECODE(layoutTestResourcesDir, "3dolph.gif", 3dolph_gif, 5)
+// BENCHMARK_DECODE(layoutTestResourcesDir, "disneypixar-disney-pixar-jTXvL4LjakYI8.gif", disneypixar_disney_pixar_jTXvL4LjakYI8_gif, 1)
 } // namespace blink