Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/image-decoders/gif/GIFImageDecoderTest.cpp

-/*
- * Copyright (C) 2013 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-
-#include "core/platform/image-decoders/gif/GIFImageDecoder.h"
-
-#include "platform/SharedBuffer.h"
-#include "public/platform/Platform.h"
-#include "public/platform/WebData.h"
-#include "public/platform/WebSize.h"
-#include "public/platform/WebUnitTestSupport.h"
-#include "wtf/OwnPtr.h"
-#include "wtf/PassOwnPtr.h"
-#include "wtf/StringHasher.h"
-#include "wtf/Vector.h"
-#include <gtest/gtest.h>
-
-using namespace WebCore;
-using namespace blink;
-
-namespace {
-
-PassRefPtr<SharedBuffer> readFile(const char* fileName)
-{
-    String filePath = Platform::current()->unitTestSupport()->webKitRootDir();
-    filePath.append(fileName);
-
-    return Platform::current()->unitTestSupport()->readFromFile(filePath);
-}
-
-PassOwnPtr<GIFImageDecoder> createDecoder()
-{
-    return adoptPtr(new GIFImageDecoder(ImageSource::AlphaNotPremultiplied, ImageSource::GammaAndColorProfileApplied, ImageDecoder::noDecodedImageByteLimit));
-}
-
-unsigned hashSkBitmap(const SkBitmap& bitmap)
-{
-    return StringHasher::hashMemory(bitmap.getPixels(), bitmap.getSize());
-}
-
-void createDecodingBaseline(SharedBuffer* data, Vector<unsigned>* baselineHashes)
-{
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-    decoder->setData(data, true);
-    size_t frameCount = decoder->frameCount();
-    for (size_t i = 0; i < frameCount; ++i) {
-        ImageFrame* frame = decoder->frameBufferAtIndex(i);
-        baselineHashes->append(hashSkBitmap(frame->getSkBitmap()));
-    }
-}
-
-void testRandomFrameDecode(const char* gifFile)
-{
-    SCOPED_TRACE(gifFile);
-
-    RefPtr<SharedBuffer> fullData = readFile(gifFile);
-    ASSERT_TRUE(fullData.get());
-    Vector<unsigned> baselineHashes;
-    createDecodingBaseline(fullData.get(), &baselineHashes);
-    size_t frameCount = baselineHashes.size();
-
-    // Random decoding should get the same results as sequential decoding.
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-    decoder->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], hashSkBitmap(frame->getSkBitmap()));
-        }
-    }
-
-    // Decoding in reverse order.
-    decoder = createDecoder();
-    decoder->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], hashSkBitmap(frame->getSkBitmap()));
-    }
-}
-
-void testRandomDecodeAfterClearFrameBufferCache(const char* gifFile)
-{
-    SCOPED_TRACE(gifFile);
-
-    RefPtr<SharedBuffer> data = readFile(gifFile);
-    ASSERT_TRUE(data.get());
-    Vector<unsigned> baselineHashes;
-    createDecodingBaseline(data.get(), &baselineHashes);
-    size_t frameCount = baselineHashes.size();
-
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-    decoder->setData(data.get(), true);
-    for (size_t clearExceptFrame = 0; clearExceptFrame < frameCount; ++clearExceptFrame) {
-        decoder->clearCacheExceptFrame(clearExceptFrame);
-        const size_t skippingStep = 5;
-        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);
-                ImageFrame* frame = decoder->frameBufferAtIndex(j);
-                EXPECT_EQ(baselineHashes[j], hashSkBitmap(frame->getSkBitmap()));
-            }
-        }
-    }
-}
-
-} // namespace
-
-TEST(GIFImageDecoderTest, decodeTwoFrames)
-{
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-
-    RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/animated.gif");
-    ASSERT_TRUE(data.get());
-    decoder->setData(data.get(), true);
-    EXPECT_EQ(cAnimationLoopOnce, decoder->repetitionCount());
-
-    ImageFrame* frame = decoder->frameBufferAtIndex(0);
-    uint32_t generationID0 = frame->getSkBitmap().getGenerationID();
-    EXPECT_EQ(ImageFrame::FrameComplete, frame->status());
-    EXPECT_EQ(16, frame->getSkBitmap().width());
-    EXPECT_EQ(16, frame->getSkBitmap().height());
-
-    frame = decoder->frameBufferAtIndex(1);
-    uint32_t generationID1 = frame->getSkBitmap().getGenerationID();
-    EXPECT_EQ(ImageFrame::FrameComplete, frame->status());
-    EXPECT_EQ(16, frame->getSkBitmap().width());
-    EXPECT_EQ(16, frame->getSkBitmap().height());
-    EXPECT_TRUE(generationID0 != generationID1);
-
-    EXPECT_EQ(2u, decoder->frameCount());
-    EXPECT_EQ(cAnimationLoopInfinite, decoder->repetitionCount());
-}
-
-TEST(GIFImageDecoderTest, parseAndDecode)
-{
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-
-    RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/animated.gif");
-    ASSERT_TRUE(data.get());
-    decoder->setData(data.get(), true);
-    EXPECT_EQ(cAnimationLoopOnce, decoder->repetitionCount());
-
-    // This call will parse the entire file.
-    EXPECT_EQ(2u, decoder->frameCount());
-
-    ImageFrame* frame = decoder->frameBufferAtIndex(0);
-    EXPECT_EQ(ImageFrame::FrameComplete, frame->status());
-    EXPECT_EQ(16, frame->getSkBitmap().width());
-    EXPECT_EQ(16, frame->getSkBitmap().height());
-
-    frame = decoder->frameBufferAtIndex(1);
-    EXPECT_EQ(ImageFrame::FrameComplete, frame->status());
-    EXPECT_EQ(16, frame->getSkBitmap().width());
-    EXPECT_EQ(16, frame->getSkBitmap().height());
-    EXPECT_EQ(cAnimationLoopInfinite, decoder->repetitionCount());
-}
-
-TEST(GIFImageDecoderTest, parseByteByByte)
-{
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-
-    RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/animated.gif");
-    ASSERT_TRUE(data.get());
-
-    size_t frameCount = 0;
-
-    // Pass data to decoder byte by byte.
-    for (size_t length = 1; length <= data->size(); ++length) {
-        RefPtr<SharedBuffer> tempData = SharedBuffer::create(data->data(), length);
-        decoder->setData(tempData.get(), length == data->size());
-
-        EXPECT_LE(frameCount, decoder->frameCount());
-        frameCount = decoder->frameCount();
-    }
-
-    EXPECT_EQ(2u, decoder->frameCount());
-
-    decoder->frameBufferAtIndex(0);
-    decoder->frameBufferAtIndex(1);
-    EXPECT_EQ(cAnimationLoopInfinite, decoder->repetitionCount());
-}
-
-TEST(GIFImageDecoderTest, parseAndDecodeByteByByte)
-{
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-
-    RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/animated-gif-with-offsets.gif");
-    ASSERT_TRUE(data.get());
-
-    size_t frameCount = 0;
-    size_t framesDecoded = 0;
-
-    // Pass data to decoder byte by byte.
-    for (size_t length = 1; length <= data->size(); ++length) {
-        RefPtr<SharedBuffer> tempData = SharedBuffer::create(data->data(), length);
-        decoder->setData(tempData.get(), length == data->size());
-
-        EXPECT_LE(frameCount, decoder->frameCount());
-        frameCount = decoder->frameCount();
-
-        ImageFrame* frame = decoder->frameBufferAtIndex(frameCount - 1);
-        if (frame && frame->status() == ImageFrame::FrameComplete && framesDecoded < frameCount)
-            ++framesDecoded;
-    }
-
-    EXPECT_EQ(5u, decoder->frameCount());
-    EXPECT_EQ(5u, framesDecoded);
-    EXPECT_EQ(cAnimationLoopInfinite, decoder->repetitionCount());
-}
-
-TEST(GIFImageDecoderTest, brokenSecondFrame)
-{
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-
-    RefPtr<SharedBuffer> data = readFile("/Source/web/tests/data/broken.gif");
-    ASSERT_TRUE(data.get());
-    decoder->setData(data.get(), true);
-
-    // One frame is detected but cannot be decoded.
-    EXPECT_EQ(1u, decoder->frameCount());
-    ImageFrame* frame = decoder->frameBufferAtIndex(1);
-    EXPECT_FALSE(frame);
-}
-
-TEST(GIFImageDecoderTest, progressiveDecode)
-{
-    RefPtr<SharedBuffer> fullData = readFile("/Source/web/tests/data/radient.gif");
-    ASSERT_TRUE(fullData.get());
-    const size_t fullLength = fullData->size();
-
-    OwnPtr<GIFImageDecoder> decoder;
-    ImageFrame* frame;
-
-    Vector<unsigned> truncatedHashes;
-    Vector<unsigned> progressiveHashes;
-
-    // Compute hashes when the file is truncated.
-    const size_t increment = 1;
-    for (size_t i = 1; i <= fullLength; i += increment) {
-        decoder = createDecoder();
-        RefPtr<SharedBuffer> data = SharedBuffer::create(fullData->data(), i);
-        decoder->setData(data.get(), i == fullLength);
-        frame = decoder->frameBufferAtIndex(0);
-        if (!frame) {
-            truncatedHashes.append(0);
-            continue;
-        }
-        truncatedHashes.append(hashSkBitmap(frame->getSkBitmap()));
-    }
-
-    // Compute hashes when the file is progressively decoded.
-    decoder = createDecoder();
-    for (size_t i = 1; i <= fullLength; i += increment) {
-        RefPtr<SharedBuffer> data = SharedBuffer::create(fullData->data(), i);
-        decoder->setData(data.get(), i == fullLength);
-        frame = decoder->frameBufferAtIndex(0);
-        if (!frame) {
-            progressiveHashes.append(0);
-            continue;
-        }
-        progressiveHashes.append(hashSkBitmap(frame->getSkBitmap()));
-    }
-
-    bool match = true;
-    for (size_t i = 0; i < truncatedHashes.size(); ++i) {
-        if (truncatedHashes[i] != progressiveHashes[i]) {
-            match = false;
-            break;
-        }
-    }
-    EXPECT_TRUE(match);
-}
-
-TEST(GIFImageDecoderTest, allDataReceivedTruncation)
-{
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-
-    RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/animated.gif");
-    ASSERT_TRUE(data.get());
-
-    ASSERT_GE(data->size(), 10u);
-    RefPtr<SharedBuffer> tempData = SharedBuffer::create(data->data(), data->size() - 10);
-    decoder->setData(tempData.get(), true);
-
-    EXPECT_EQ(2u, decoder->frameCount());
-    EXPECT_FALSE(decoder->failed());
-
-    decoder->frameBufferAtIndex(0);
-    EXPECT_FALSE(decoder->failed());
-    decoder->frameBufferAtIndex(1);
-    EXPECT_TRUE(decoder->failed());
-}
-
-TEST(GIFImageDecoderTest, frameIsComplete)
-{
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-
-    RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/animated.gif");
-    ASSERT_TRUE(data.get());
-    decoder->setData(data.get(), true);
-
-    EXPECT_EQ(2u, decoder->frameCount());
-    EXPECT_FALSE(decoder->failed());
-    EXPECT_TRUE(decoder->frameIsCompleteAtIndex(0));
-    EXPECT_TRUE(decoder->frameIsCompleteAtIndex(1));
-}
-
-TEST(GIFImageDecoderTest, frameIsCompleteLoading)
-{
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-
-    RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/animated.gif");
-    ASSERT_TRUE(data.get());
-
-    ASSERT_GE(data->size(), 10u);
-    RefPtr<SharedBuffer> tempData = SharedBuffer::create(data->data(), data->size() - 10);
-    decoder->setData(tempData.get(), false);
-
-    EXPECT_EQ(2u, decoder->frameCount());
-    EXPECT_FALSE(decoder->failed());
-    EXPECT_TRUE(decoder->frameIsCompleteAtIndex(0));
-    EXPECT_FALSE(decoder->frameIsCompleteAtIndex(1));
-
-    decoder->setData(data.get(), true);
-    EXPECT_EQ(2u, decoder->frameCount());
-    EXPECT_TRUE(decoder->frameIsCompleteAtIndex(0));
-    EXPECT_TRUE(decoder->frameIsCompleteAtIndex(1));
-}
-
-TEST(GIFImageDecoderTest, badTerminator)
-{
-    RefPtr<SharedBuffer> referenceData = readFile("/Source/web/tests/data/radient.gif");
-    RefPtr<SharedBuffer> testData = readFile("/Source/web/tests/data/radient-bad-terminator.gif");
-    ASSERT_TRUE(referenceData.get());
-    ASSERT_TRUE(testData.get());
-
-    OwnPtr<GIFImageDecoder> referenceDecoder(createDecoder());
-    referenceDecoder->setData(referenceData.get(), true);
-    EXPECT_EQ(1u, referenceDecoder->frameCount());
-    ImageFrame* referenceFrame = referenceDecoder->frameBufferAtIndex(0);
-    ASSERT(referenceFrame);
-
-    OwnPtr<GIFImageDecoder> testDecoder(createDecoder());
-    testDecoder->setData(testData.get(), true);
-    EXPECT_EQ(1u, testDecoder->frameCount());
-    ImageFrame* testFrame = testDecoder->frameBufferAtIndex(0);
-    ASSERT(testFrame);
-
-    EXPECT_EQ(hashSkBitmap(referenceFrame->getSkBitmap()), hashSkBitmap(testFrame->getSkBitmap()));
-}
-
-TEST(GIFImageDecoderTest, updateRequiredPreviousFrameAfterFirstDecode)
-{
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-
-    RefPtr<SharedBuffer> fullData = readFile("/LayoutTests/fast/images/resources/animated-10color.gif");
-    ASSERT_TRUE(fullData.get());
-
-    // Give it data that is enough to parse but not decode in order to check the status
-    // of requiredPreviousFrameIndex before decoding.
-    size_t partialSize = 1;
-    do {
-        RefPtr<SharedBuffer> data = SharedBuffer::create(fullData->data(), partialSize);
-        decoder->setData(data.get(), false);
-        ++partialSize;
-    } while (!decoder->frameCount() || decoder->frameBufferAtIndex(0)->status() == ImageFrame::FrameEmpty);
-
-    EXPECT_EQ(kNotFound, decoder->frameBufferAtIndex(0)->requiredPreviousFrameIndex());
-    unsigned frameCount = decoder->frameCount();
-    for (size_t i = 1; i < frameCount; ++i)
-        EXPECT_EQ(i - 1, decoder->frameBufferAtIndex(i)->requiredPreviousFrameIndex());
-
-    decoder->setData(fullData.get(), true);
-    for (size_t i = 0; i < frameCount; ++i)
-        EXPECT_EQ(kNotFound, decoder->frameBufferAtIndex(i)->requiredPreviousFrameIndex());
-}
-
-TEST(GIFImageDecoderTest, randomFrameDecode)
-{
-    // Single frame image.
-    testRandomFrameDecode("/Source/web/tests/data/radient.gif");
-    // Multiple frame images.
-    testRandomFrameDecode("/LayoutTests/fast/images/resources/animated-gif-with-offsets.gif");
-    testRandomFrameDecode("/LayoutTests/fast/images/resources/animated-10color.gif");
-}
-
-TEST(GIFImageDecoderTest, randomDecodeAfterClearFrameBufferCache)
-{
-    // Single frame image.
-    testRandomDecodeAfterClearFrameBufferCache("/Source/web/tests/data/radient.gif");
-    // Multiple frame images.
-    testRandomDecodeAfterClearFrameBufferCache("/LayoutTests/fast/images/resources/animated-gif-with-offsets.gif");
-    testRandomDecodeAfterClearFrameBufferCache("/LayoutTests/fast/images/resources/animated-10color.gif");
-}
-
-TEST(GIFImageDecoderTest, resumePartialDecodeAfterClearFrameBufferCache)
-{
-    RefPtr<SharedBuffer> fullData = readFile("/LayoutTests/fast/images/resources/animated-10color.gif");
-    ASSERT_TRUE(fullData.get());
-    Vector<unsigned> baselineHashes;
-    createDecodingBaseline(fullData.get(), &baselineHashes);
-    size_t frameCount = baselineHashes.size();
-
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-
-    // Let frame 0 be partially decoded.
-    size_t partialSize = 1;
-    do {
-        RefPtr<SharedBuffer> data = SharedBuffer::create(fullData->data(), partialSize);
-        decoder->setData(data.get(), false);
-        ++partialSize;
-    } while (!decoder->frameCount() || decoder->frameBufferAtIndex(0)->status() == ImageFrame::FrameEmpty);
-
-    // Skip to the last frame and clear.
-    decoder->setData(fullData.get(), true);
-    EXPECT_EQ(frameCount, decoder->frameCount());
-    ImageFrame* lastFrame = decoder->frameBufferAtIndex(frameCount - 1);
-    EXPECT_EQ(baselineHashes[frameCount - 1], hashSkBitmap(lastFrame->getSkBitmap()));
-    decoder->clearCacheExceptFrame(kNotFound);
-
-    // Resume decoding of the first frame.
-    ImageFrame* firstFrame = decoder->frameBufferAtIndex(0);
-    EXPECT_EQ(ImageFrame::FrameComplete, firstFrame->status());
-    EXPECT_EQ(baselineHashes[0], hashSkBitmap(firstFrame->getSkBitmap()));
-}
-
-// The first LZW codes in the image are invalid values that try to create a loop
-// in the dictionary. Decoding should fail, but not infinitely loop or corrupt memory.
-TEST(GIFImageDecoderTest, badInitialCode)
-{
-    RefPtr<SharedBuffer> testData = readFile("/Source/core/platform/image-decoders/testing/bad-initial-code.gif");
-    ASSERT_TRUE(testData.get());
-
-    OwnPtr<GIFImageDecoder> testDecoder(createDecoder());
-    testDecoder->setData(testData.get(), true);
-    EXPECT_EQ(1u, testDecoder->frameCount());
-    ASSERT_TRUE(testDecoder->frameBufferAtIndex(0));
-    EXPECT_TRUE(testDecoder->failed());
-}
-
-// The image has an invalid LZW code that exceeds dictionary size. Decoding should fail.
-TEST(GIFImageDecoderTest, badCode)
-{
-    RefPtr<SharedBuffer> testData = readFile("/Source/core/platform/image-decoders/testing/bad-code.gif");
-    ASSERT_TRUE(testData.get());
-
-    OwnPtr<GIFImageDecoder> testDecoder(createDecoder());
-    testDecoder->setData(testData.get(), true);
-    EXPECT_EQ(1u, testDecoder->frameCount());
-    ASSERT_TRUE(testDecoder->frameBufferAtIndex(0));
-    EXPECT_TRUE(testDecoder->failed());
-}
-
-TEST(GIFImageDecoderTest, invalidDisposalMethod)
-{
-    OwnPtr<GIFImageDecoder> decoder = createDecoder();
-
-    // The image has 2 frames, with disposal method 4 and 5, respectively.
-    RefPtr<SharedBuffer> data = readFile("/Source/web/tests/data/invalid-disposal-method.gif");
-    ASSERT_TRUE(data.get());
-    decoder->setData(data.get(), true);
-
-    EXPECT_EQ(2u, decoder->frameCount());
-    // Disposal method 4 is converted to ImageFrame::DisposeOverwritePrevious.
-    EXPECT_EQ(ImageFrame::DisposeOverwritePrevious, decoder->frameBufferAtIndex(0)->disposalMethod());
-    // Disposal method 5 is ignored.
-    EXPECT_EQ(ImageFrame::DisposeNotSpecified, decoder->frameBufferAtIndex(1)->disposalMethod());
-}