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      1 /*
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     30 
     31 #include "config.h"
     32 
     33 #include "platform/image-decoders/webp/WEBPImageDecoder.h"
     34 
     35 #include "RuntimeEnabledFeatures.h"
     36 #include "platform/SharedBuffer.h"
     37 #include "public/platform/Platform.h"
     38 #include "public/platform/WebData.h"
     39 #include "public/platform/WebSize.h"
     40 #include "public/platform/WebUnitTestSupport.h"
     41 #include "wtf/OwnPtr.h"
     42 #include "wtf/PassOwnPtr.h"
     43 #include "wtf/StringHasher.h"
     44 #include "wtf/Vector.h"
     45 #include "wtf/dtoa/utils.h"
     46 #include <gtest/gtest.h>
     47 
     48 using namespace WebCore;
     49 using namespace blink;
     50 
     51 namespace {
     52 
     53 PassRefPtr<SharedBuffer> readFile(const char* fileName)
     54 {
     55     String filePath = Platform::current()->unitTestSupport()->webKitRootDir();
     56     filePath.append(fileName);
     57 
     58     return Platform::current()->unitTestSupport()->readFromFile(filePath);
     59 }
     60 
     61 PassOwnPtr<WEBPImageDecoder> createDecoder()
     62 {
     63     return adoptPtr(new WEBPImageDecoder(ImageSource::AlphaNotPremultiplied, ImageSource::GammaAndColorProfileApplied, ImageDecoder::noDecodedImageByteLimit));
     64 }
     65 
     66 unsigned hashSkBitmap(const SkBitmap& bitmap)
     67 {
     68     return StringHasher::hashMemory(bitmap.getPixels(), bitmap.getSize());
     69 }
     70 
     71 void createDecodingBaseline(SharedBuffer* data, Vector<unsigned>* baselineHashes)
     72 {
     73     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
     74     decoder->setData(data, true);
     75     size_t frameCount = decoder->frameCount();
     76     for (size_t i = 0; i < frameCount; ++i) {
     77         ImageFrame* frame = decoder->frameBufferAtIndex(i);
     78         baselineHashes->append(hashSkBitmap(frame->getSkBitmap()));
     79     }
     80 }
     81 
     82 void testRandomFrameDecode(const char* webpFile)
     83 {
     84     SCOPED_TRACE(webpFile);
     85 
     86     RefPtr<SharedBuffer> fullData = readFile(webpFile);
     87     ASSERT_TRUE(fullData.get());
     88     Vector<unsigned> baselineHashes;
     89     createDecodingBaseline(fullData.get(), &baselineHashes);
     90     size_t frameCount = baselineHashes.size();
     91 
     92     // Random decoding should get the same results as sequential decoding.
     93     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
     94     decoder->setData(fullData.get(), true);
     95     const size_t skippingStep = 5;
     96     for (size_t i = 0; i < skippingStep; ++i) {
     97         for (size_t j = i; j < frameCount; j += skippingStep) {
     98             SCOPED_TRACE(testing::Message() << "Random i:" << i << " j:" << j);
     99             ImageFrame* frame = decoder->frameBufferAtIndex(j);
    100             EXPECT_EQ(baselineHashes[j], hashSkBitmap(frame->getSkBitmap()));
    101         }
    102     }
    103 
    104     // Decoding in reverse order.
    105     decoder = createDecoder();
    106     decoder->setData(fullData.get(), true);
    107     for (size_t i = frameCount; i; --i) {
    108         SCOPED_TRACE(testing::Message() << "Reverse i:" << i);
    109         ImageFrame* frame = decoder->frameBufferAtIndex(i - 1);
    110         EXPECT_EQ(baselineHashes[i - 1], hashSkBitmap(frame->getSkBitmap()));
    111     }
    112 }
    113 
    114 void testRandomDecodeAfterClearFrameBufferCache(const char* webpFile)
    115 {
    116     SCOPED_TRACE(webpFile);
    117 
    118     RefPtr<SharedBuffer> data = readFile(webpFile);
    119     ASSERT_TRUE(data.get());
    120     Vector<unsigned> baselineHashes;
    121     createDecodingBaseline(data.get(), &baselineHashes);
    122     size_t frameCount = baselineHashes.size();
    123 
    124     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    125     decoder->setData(data.get(), true);
    126     for (size_t clearExceptFrame = 0; clearExceptFrame < frameCount; ++clearExceptFrame) {
    127         decoder->clearCacheExceptFrame(clearExceptFrame);
    128         const size_t skippingStep = 5;
    129         for (size_t i = 0; i < skippingStep; ++i) {
    130             for (size_t j = 0; j < frameCount; j += skippingStep) {
    131                 SCOPED_TRACE(testing::Message() << "Random i:" << i << " j:" << j);
    132                 ImageFrame* frame = decoder->frameBufferAtIndex(j);
    133                 EXPECT_EQ(baselineHashes[j], hashSkBitmap(frame->getSkBitmap()));
    134             }
    135         }
    136     }
    137 }
    138 
    139 void testDecodeAfterReallocatingData(const char* webpFile)
    140 {
    141     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    142     RefPtr<SharedBuffer> data = readFile(webpFile);
    143     ASSERT_TRUE(data.get());
    144 
    145     // Parse from 'data'.
    146     decoder->setData(data.get(), true);
    147     size_t frameCount = decoder->frameCount();
    148 
    149     // ... and then decode frames from 'reallocatedData'.
    150     RefPtr<SharedBuffer> reallocatedData = data.get()->copy();
    151     ASSERT_TRUE(reallocatedData.get());
    152     data.clear();
    153     decoder->setData(reallocatedData.get(), true);
    154 
    155     for (size_t i = 0; i < frameCount; ++i) {
    156         const ImageFrame* const frame = decoder->frameBufferAtIndex(i);
    157         EXPECT_EQ(ImageFrame::FrameComplete, frame->status());
    158     }
    159 }
    160 
    161 void testInvalidImage(const char* webpFile)
    162 {
    163     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    164 
    165     RefPtr<SharedBuffer> data = readFile(webpFile);
    166     ASSERT_TRUE(data.get());
    167     decoder->setData(data.get(), true);
    168 
    169     EXPECT_EQ(0u, decoder->frameCount());
    170     ImageFrame* frame = decoder->frameBufferAtIndex(0);
    171     EXPECT_FALSE(frame);
    172     EXPECT_EQ(cAnimationLoopOnce, decoder->repetitionCount());
    173 }
    174 
    175 } // namespace
    176 
    177 class AnimatedWebPTests : public ::testing::Test {
    178 protected:
    179     virtual void SetUp()
    180     {
    181         // Enable animated WebP for all the tests.
    182         WebCore::RuntimeEnabledFeatures::setAnimatedWebPEnabled(true);
    183     }
    184 };
    185 
    186 TEST_F(AnimatedWebPTests, uniqueGenerationIDs)
    187 {
    188     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    189 
    190     RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/webp-animated.webp");
    191     ASSERT_TRUE(data.get());
    192     decoder->setData(data.get(), true);
    193 
    194     ImageFrame* frame = decoder->frameBufferAtIndex(0);
    195     uint32_t generationID0 = frame->getSkBitmap().getGenerationID();
    196     frame = decoder->frameBufferAtIndex(1);
    197     uint32_t generationID1 = frame->getSkBitmap().getGenerationID();
    198 
    199     EXPECT_TRUE(generationID0 != generationID1);
    200 }
    201 
    202 TEST_F(AnimatedWebPTests, verifyAnimationParametersTransparentImage)
    203 {
    204     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    205     EXPECT_EQ(cAnimationLoopOnce, decoder->repetitionCount());
    206 
    207     RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/webp-animated.webp");
    208     ASSERT_TRUE(data.get());
    209     decoder->setData(data.get(), true);
    210 
    211     const int canvasWidth = 11;
    212     const int canvasHeight = 29;
    213     const struct AnimParam {
    214         int xOffset, yOffset, width, height;
    215         ImageFrame::DisposalMethod disposalMethod;
    216         ImageFrame::AlphaBlendSource alphaBlendSource;
    217         unsigned duration;
    218         bool hasAlpha;
    219     } frameParameters[] = {
    220         { 0, 0, 11, 29, ImageFrame::DisposeKeep, ImageFrame::BlendAtopPreviousFrame, 1000u, true },
    221         { 2, 10, 7, 17, ImageFrame::DisposeKeep, ImageFrame::BlendAtopPreviousFrame, 500u, true },
    222         { 2, 2, 7, 16, ImageFrame::DisposeKeep, ImageFrame::BlendAtopPreviousFrame, 1000u, true },
    223     };
    224 
    225     for (size_t i = 0; i < ARRAY_SIZE(frameParameters); ++i) {
    226         const ImageFrame* const frame = decoder->frameBufferAtIndex(i);
    227         EXPECT_EQ(ImageFrame::FrameComplete, frame->status());
    228         EXPECT_EQ(canvasWidth, frame->getSkBitmap().width());
    229         EXPECT_EQ(canvasHeight, frame->getSkBitmap().height());
    230         EXPECT_EQ(frameParameters[i].xOffset, frame->originalFrameRect().x());
    231         EXPECT_EQ(frameParameters[i].yOffset, frame->originalFrameRect().y());
    232         EXPECT_EQ(frameParameters[i].width, frame->originalFrameRect().width());
    233         EXPECT_EQ(frameParameters[i].height, frame->originalFrameRect().height());
    234         EXPECT_EQ(frameParameters[i].disposalMethod, frame->disposalMethod());
    235         EXPECT_EQ(frameParameters[i].alphaBlendSource, frame->alphaBlendSource());
    236         EXPECT_EQ(frameParameters[i].duration, frame->duration());
    237         EXPECT_EQ(frameParameters[i].hasAlpha, frame->hasAlpha());
    238     }
    239 
    240     EXPECT_EQ(ARRAY_SIZE(frameParameters), decoder->frameCount());
    241     EXPECT_EQ(cAnimationLoopInfinite, decoder->repetitionCount());
    242 }
    243 
    244 TEST_F(AnimatedWebPTests, verifyAnimationParametersOpaqueFramesTransparentBackground)
    245 {
    246     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    247     EXPECT_EQ(cAnimationLoopOnce, decoder->repetitionCount());
    248 
    249     RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/webp-animated-opaque.webp");
    250     ASSERT_TRUE(data.get());
    251     decoder->setData(data.get(), true);
    252 
    253     const int canvasWidth = 94;
    254     const int canvasHeight = 87;
    255     const struct AnimParam {
    256         int xOffset, yOffset, width, height;
    257         ImageFrame::DisposalMethod disposalMethod;
    258         ImageFrame::AlphaBlendSource alphaBlendSource;
    259         unsigned duration;
    260         bool hasAlpha;
    261     } frameParameters[] = {
    262         { 4, 10, 33, 32, ImageFrame::DisposeOverwriteBgcolor, ImageFrame::BlendAtopPreviousFrame, 1000u, true },
    263         { 34, 30, 33, 32, ImageFrame::DisposeOverwriteBgcolor, ImageFrame::BlendAtopPreviousFrame, 1000u, true },
    264         { 62, 50, 32, 32, ImageFrame::DisposeOverwriteBgcolor, ImageFrame::BlendAtopPreviousFrame, 1000u, true },
    265         { 10, 54, 32, 33, ImageFrame::DisposeOverwriteBgcolor, ImageFrame::BlendAtopPreviousFrame, 1000u, true },
    266     };
    267 
    268     for (size_t i = 0; i < ARRAY_SIZE(frameParameters); ++i) {
    269         const ImageFrame* const frame = decoder->frameBufferAtIndex(i);
    270         EXPECT_EQ(ImageFrame::FrameComplete, frame->status());
    271         EXPECT_EQ(canvasWidth, frame->getSkBitmap().width());
    272         EXPECT_EQ(canvasHeight, frame->getSkBitmap().height());
    273         EXPECT_EQ(frameParameters[i].xOffset, frame->originalFrameRect().x());
    274         EXPECT_EQ(frameParameters[i].yOffset, frame->originalFrameRect().y());
    275         EXPECT_EQ(frameParameters[i].width, frame->originalFrameRect().width());
    276         EXPECT_EQ(frameParameters[i].height, frame->originalFrameRect().height());
    277         EXPECT_EQ(frameParameters[i].disposalMethod, frame->disposalMethod());
    278         EXPECT_EQ(frameParameters[i].alphaBlendSource, frame->alphaBlendSource());
    279         EXPECT_EQ(frameParameters[i].duration, frame->duration());
    280         EXPECT_EQ(frameParameters[i].hasAlpha, frame->hasAlpha());
    281     }
    282 
    283     EXPECT_EQ(ARRAY_SIZE(frameParameters), decoder->frameCount());
    284     EXPECT_EQ(cAnimationLoopInfinite, decoder->repetitionCount());
    285 }
    286 
    287 TEST_F(AnimatedWebPTests, verifyAnimationParametersBlendOverwrite)
    288 {
    289     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    290     EXPECT_EQ(cAnimationLoopOnce, decoder->repetitionCount());
    291 
    292     RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/webp-animated-no-blend.webp");
    293     ASSERT_TRUE(data.get());
    294     decoder->setData(data.get(), true);
    295 
    296     const int canvasWidth = 94;
    297     const int canvasHeight = 87;
    298     const struct AnimParam {
    299         int xOffset, yOffset, width, height;
    300         ImageFrame::DisposalMethod disposalMethod;
    301         ImageFrame::AlphaBlendSource alphaBlendSource;
    302         unsigned duration;
    303         bool hasAlpha;
    304     } frameParameters[] = {
    305         { 4, 10, 33, 32, ImageFrame::DisposeOverwriteBgcolor, ImageFrame::BlendAtopBgcolor, 1000u, true },
    306         { 34, 30, 33, 32, ImageFrame::DisposeOverwriteBgcolor, ImageFrame::BlendAtopBgcolor, 1000u, true },
    307         { 62, 50, 32, 32, ImageFrame::DisposeOverwriteBgcolor, ImageFrame::BlendAtopBgcolor, 1000u, true },
    308         { 10, 54, 32, 33, ImageFrame::DisposeOverwriteBgcolor, ImageFrame::BlendAtopBgcolor, 1000u, true },
    309     };
    310 
    311     for (size_t i = 0; i < ARRAY_SIZE(frameParameters); ++i) {
    312         const ImageFrame* const frame = decoder->frameBufferAtIndex(i);
    313         EXPECT_EQ(ImageFrame::FrameComplete, frame->status());
    314         EXPECT_EQ(canvasWidth, frame->getSkBitmap().width());
    315         EXPECT_EQ(canvasHeight, frame->getSkBitmap().height());
    316         EXPECT_EQ(frameParameters[i].xOffset, frame->originalFrameRect().x());
    317         EXPECT_EQ(frameParameters[i].yOffset, frame->originalFrameRect().y());
    318         EXPECT_EQ(frameParameters[i].width, frame->originalFrameRect().width());
    319         EXPECT_EQ(frameParameters[i].height, frame->originalFrameRect().height());
    320         EXPECT_EQ(frameParameters[i].disposalMethod, frame->disposalMethod());
    321         EXPECT_EQ(frameParameters[i].alphaBlendSource, frame->alphaBlendSource());
    322         EXPECT_EQ(frameParameters[i].duration, frame->duration());
    323         EXPECT_EQ(frameParameters[i].hasAlpha, frame->hasAlpha());
    324     }
    325 
    326     EXPECT_EQ(ARRAY_SIZE(frameParameters), decoder->frameCount());
    327     EXPECT_EQ(cAnimationLoopInfinite, decoder->repetitionCount());
    328 }
    329 
    330 TEST_F(AnimatedWebPTests, parseAndDecodeByteByByte)
    331 {
    332     const struct TestImage {
    333         const char* filename;
    334         unsigned frameCount;
    335         int repetitionCount;
    336     } testImages[] = {
    337         { "/LayoutTests/fast/images/resources/webp-animated.webp", 3u, cAnimationLoopInfinite },
    338         { "/LayoutTests/fast/images/resources/webp-animated-icc-xmp.webp", 13u, 32000 },
    339     };
    340 
    341     for (size_t i = 0; i < ARRAY_SIZE(testImages); ++i) {
    342         OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    343         RefPtr<SharedBuffer> data = readFile(testImages[i].filename);
    344         ASSERT_TRUE(data.get());
    345 
    346         size_t frameCount = 0;
    347         size_t framesDecoded = 0;
    348 
    349         // Pass data to decoder byte by byte.
    350         for (size_t length = 1; length <= data->size(); ++length) {
    351             RefPtr<SharedBuffer> tempData = SharedBuffer::create(data->data(), length);
    352             decoder->setData(tempData.get(), length == data->size());
    353 
    354             EXPECT_LE(frameCount, decoder->frameCount());
    355             frameCount = decoder->frameCount();
    356 
    357             ImageFrame* frame = decoder->frameBufferAtIndex(frameCount - 1);
    358             if (frame && frame->status() == ImageFrame::FrameComplete && framesDecoded < frameCount)
    359                 ++framesDecoded;
    360         }
    361 
    362         EXPECT_EQ(testImages[i].frameCount, decoder->frameCount());
    363         EXPECT_EQ(testImages[i].frameCount, framesDecoded);
    364         EXPECT_EQ(testImages[i].repetitionCount, decoder->repetitionCount());
    365     }
    366 }
    367 
    368 TEST_F(AnimatedWebPTests, invalidImages)
    369 {
    370     // ANMF chunk size is smaller than ANMF header size.
    371     testInvalidImage("/LayoutTests/fast/images/resources/invalid-animated-webp.webp");
    372     // One of the frame rectangles extends outside the image boundary.
    373     testInvalidImage("/LayoutTests/fast/images/resources/invalid-animated-webp3.webp");
    374 }
    375 
    376 TEST_F(AnimatedWebPTests, truncatedLastFrame)
    377 {
    378     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    379 
    380     RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/invalid-animated-webp2.webp");
    381     ASSERT_TRUE(data.get());
    382     decoder->setData(data.get(), true);
    383 
    384     unsigned frameCount = 8;
    385     EXPECT_EQ(frameCount, decoder->frameCount());
    386     ImageFrame* frame = decoder->frameBufferAtIndex(frameCount - 1);
    387     EXPECT_FALSE(frame);
    388     frame = decoder->frameBufferAtIndex(0);
    389     EXPECT_FALSE(frame);
    390 }
    391 
    392 TEST_F(AnimatedWebPTests, truncatedInBetweenFrame)
    393 {
    394     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    395 
    396     RefPtr<SharedBuffer> fullData = readFile("/LayoutTests/fast/images/resources/invalid-animated-webp4.webp");
    397     ASSERT_TRUE(fullData.get());
    398     RefPtr<SharedBuffer> data = SharedBuffer::create(fullData->data(), fullData->size() - 1);
    399     decoder->setData(data.get(), false);
    400 
    401     ImageFrame* frame = decoder->frameBufferAtIndex(2);
    402     EXPECT_FALSE(frame);
    403 }
    404 
    405 // Reproduce a crash that used to happen for a specific file with specific sequence of method calls.
    406 TEST_F(AnimatedWebPTests, reproCrash)
    407 {
    408     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    409 
    410     RefPtr<SharedBuffer> fullData = readFile("/LayoutTests/fast/images/resources/invalid_vp8_vp8x.webp");
    411     ASSERT_TRUE(fullData.get());
    412 
    413     // Parse partial data up to which error in bitstream is not detected.
    414     const size_t partialSize = 32768;
    415     ASSERT_GT(fullData->size(), partialSize);
    416     RefPtr<SharedBuffer> data = SharedBuffer::create(fullData->data(), partialSize);
    417     decoder->setData(data.get(), false);
    418     EXPECT_EQ(1u, decoder->frameCount());
    419 
    420     // Parse full data now. The error in bitstream should now be detected.
    421     decoder->setData(fullData.get(), true);
    422     EXPECT_EQ(0u, decoder->frameCount());
    423     ImageFrame* frame = decoder->frameBufferAtIndex(0);
    424     EXPECT_FALSE(frame);
    425     EXPECT_EQ(cAnimationLoopOnce, decoder->repetitionCount());
    426 }
    427 
    428 TEST_F(AnimatedWebPTests, progressiveDecode)
    429 {
    430     RefPtr<SharedBuffer> fullData = readFile("/LayoutTests/fast/images/resources/webp-animated.webp");
    431     ASSERT_TRUE(fullData.get());
    432     const size_t fullLength = fullData->size();
    433 
    434     OwnPtr<WEBPImageDecoder>  decoder;
    435     ImageFrame* frame;
    436 
    437     Vector<unsigned> truncatedHashes;
    438     Vector<unsigned> progressiveHashes;
    439 
    440     // Compute hashes when the file is truncated.
    441     const size_t increment = 1;
    442     for (size_t i = 1; i <= fullLength; i += increment) {
    443         decoder = createDecoder();
    444         RefPtr<SharedBuffer> data = SharedBuffer::create(fullData->data(), i);
    445         decoder->setData(data.get(), i == fullLength);
    446         frame = decoder->frameBufferAtIndex(0);
    447         if (!frame) {
    448             truncatedHashes.append(0);
    449             continue;
    450         }
    451         truncatedHashes.append(hashSkBitmap(frame->getSkBitmap()));
    452     }
    453 
    454     // Compute hashes when the file is progressively decoded.
    455     decoder = createDecoder();
    456     for (size_t i = 1; i <= fullLength; i += increment) {
    457         RefPtr<SharedBuffer> data = SharedBuffer::create(fullData->data(), i);
    458         decoder->setData(data.get(), i == fullLength);
    459         frame = decoder->frameBufferAtIndex(0);
    460         if (!frame) {
    461             progressiveHashes.append(0);
    462             continue;
    463         }
    464         progressiveHashes.append(hashSkBitmap(frame->getSkBitmap()));
    465     }
    466 
    467     bool match = true;
    468     for (size_t i = 0; i < truncatedHashes.size(); ++i) {
    469         if (truncatedHashes[i] != progressiveHashes[i]) {
    470             match = false;
    471             break;
    472         }
    473     }
    474     EXPECT_TRUE(match);
    475 }
    476 
    477 TEST_F(AnimatedWebPTests, frameIsCompleteAndDuration)
    478 {
    479     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    480 
    481     RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/webp-animated.webp");
    482     ASSERT_TRUE(data.get());
    483 
    484     ASSERT_GE(data->size(), 10u);
    485     RefPtr<SharedBuffer> tempData = SharedBuffer::create(data->data(), data->size() - 10);
    486     decoder->setData(tempData.get(), false);
    487 
    488     EXPECT_EQ(2u, decoder->frameCount());
    489     EXPECT_FALSE(decoder->failed());
    490     EXPECT_TRUE(decoder->frameIsCompleteAtIndex(0));
    491     EXPECT_EQ(1000, decoder->frameDurationAtIndex(0));
    492     EXPECT_TRUE(decoder->frameIsCompleteAtIndex(1));
    493     EXPECT_EQ(500, decoder->frameDurationAtIndex(1));
    494 
    495     decoder->setData(data.get(), true);
    496     EXPECT_EQ(3u, decoder->frameCount());
    497     EXPECT_TRUE(decoder->frameIsCompleteAtIndex(0));
    498     EXPECT_EQ(1000, decoder->frameDurationAtIndex(0));
    499     EXPECT_TRUE(decoder->frameIsCompleteAtIndex(1));
    500     EXPECT_EQ(500, decoder->frameDurationAtIndex(1));
    501     EXPECT_TRUE(decoder->frameIsCompleteAtIndex(2));
    502     EXPECT_EQ(1000.0, decoder->frameDurationAtIndex(2));
    503 }
    504 
    505 TEST_F(AnimatedWebPTests, updateRequiredPreviousFrameAfterFirstDecode)
    506 {
    507     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    508 
    509     RefPtr<SharedBuffer> fullData = readFile("/LayoutTests/fast/images/resources/webp-animated.webp");
    510     ASSERT_TRUE(fullData.get());
    511 
    512     // Give it data that is enough to parse but not decode in order to check the status
    513     // of requiredPreviousFrameIndex before decoding.
    514     size_t partialSize = 1;
    515     do {
    516         RefPtr<SharedBuffer> data = SharedBuffer::create(fullData->data(), partialSize);
    517         decoder->setData(data.get(), false);
    518         ++partialSize;
    519     } while (!decoder->frameCount() || decoder->frameBufferAtIndex(0)->status() == ImageFrame::FrameEmpty);
    520 
    521     EXPECT_EQ(kNotFound, decoder->frameBufferAtIndex(0)->requiredPreviousFrameIndex());
    522     unsigned frameCount = decoder->frameCount();
    523     for (size_t i = 1; i < frameCount; ++i)
    524         EXPECT_EQ(i - 1, decoder->frameBufferAtIndex(i)->requiredPreviousFrameIndex());
    525 
    526     decoder->setData(fullData.get(), true);
    527     for (size_t i = 0; i < frameCount; ++i)
    528         EXPECT_EQ(kNotFound, decoder->frameBufferAtIndex(i)->requiredPreviousFrameIndex());
    529 }
    530 
    531 TEST_F(AnimatedWebPTests, randomFrameDecode)
    532 {
    533     testRandomFrameDecode("/LayoutTests/fast/images/resources/webp-animated.webp");
    534     testRandomFrameDecode("/LayoutTests/fast/images/resources/webp-animated-opaque.webp");
    535     testRandomFrameDecode("/LayoutTests/fast/images/resources/webp-animated-large.webp");
    536     testRandomFrameDecode("/LayoutTests/fast/images/resources/webp-animated-icc-xmp.webp");
    537 }
    538 
    539 TEST_F(AnimatedWebPTests, randomDecodeAfterClearFrameBufferCache)
    540 {
    541     testRandomDecodeAfterClearFrameBufferCache("/LayoutTests/fast/images/resources/webp-animated.webp");
    542     testRandomDecodeAfterClearFrameBufferCache("/LayoutTests/fast/images/resources/webp-animated-opaque.webp");
    543     testRandomDecodeAfterClearFrameBufferCache("/LayoutTests/fast/images/resources/webp-animated-large.webp");
    544     testRandomDecodeAfterClearFrameBufferCache("/LayoutTests/fast/images/resources/webp-animated-icc-xmp.webp");
    545 }
    546 
    547 TEST_F(AnimatedWebPTests, resumePartialDecodeAfterClearFrameBufferCache)
    548 {
    549     RefPtr<SharedBuffer> fullData = readFile("/LayoutTests/fast/images/resources/webp-animated-large.webp");
    550     ASSERT_TRUE(fullData.get());
    551     Vector<unsigned> baselineHashes;
    552     createDecodingBaseline(fullData.get(), &baselineHashes);
    553     size_t frameCount = baselineHashes.size();
    554 
    555     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    556 
    557     // Let frame 0 be partially decoded.
    558     size_t partialSize = 1;
    559     do {
    560         RefPtr<SharedBuffer> data = SharedBuffer::create(fullData->data(), partialSize);
    561         decoder->setData(data.get(), false);
    562         ++partialSize;
    563     } while (!decoder->frameCount() || decoder->frameBufferAtIndex(0)->status() == ImageFrame::FrameEmpty);
    564 
    565     // Skip to the last frame and clear.
    566     decoder->setData(fullData.get(), true);
    567     EXPECT_EQ(frameCount, decoder->frameCount());
    568     ImageFrame* lastFrame = decoder->frameBufferAtIndex(frameCount - 1);
    569     EXPECT_EQ(baselineHashes[frameCount - 1], hashSkBitmap(lastFrame->getSkBitmap()));
    570     decoder->clearCacheExceptFrame(kNotFound);
    571 
    572     // Resume decoding of the first frame.
    573     ImageFrame* firstFrame = decoder->frameBufferAtIndex(0);
    574     EXPECT_EQ(ImageFrame::FrameComplete, firstFrame->status());
    575     EXPECT_EQ(baselineHashes[0], hashSkBitmap(firstFrame->getSkBitmap()));
    576 }
    577 
    578 TEST_F(AnimatedWebPTests, decodeAfterReallocatingData)
    579 {
    580     testDecodeAfterReallocatingData("/LayoutTests/fast/images/resources/webp-animated.webp");
    581     testDecodeAfterReallocatingData("/LayoutTests/fast/images/resources/webp-animated-icc-xmp.webp");
    582 }
    583 
    584 TEST(StaticWebPTests, truncatedImage)
    585 {
    586     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
    587 
    588     RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/truncated.webp");
    589     ASSERT_TRUE(data.get());
    590     decoder->setData(data.get(), true);
    591 
    592     ImageFrame* frame = decoder->frameBufferAtIndex(0);
    593     EXPECT_FALSE(frame);
    594 }
    595