Source/core/platform/graphics/chromium/ImageFrameGeneratorTest.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *
 * 1.  Redistributions of source code must retain the above copyright
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 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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#include "config.h"

#include "core/platform/graphics/chromium/ImageFrameGenerator.h"

#include "core/platform/SharedBuffer.h"
#include "core/platform/graphics/chromium/ImageDecodingStore.h"
#include "core/platform/graphics/chromium/test/MockImageDecoder.h"
#include <gtest/gtest.h>

using namespace WebCore;

namespace {

class ImageFrameGeneratorTest;

// Helper methods to generate standard sizes.
SkISize fullSize() { return SkISize::Make(100, 100); }
SkISize scaledSize() { return SkISize::Make(50, 50); }

class ImageFrameGeneratorTest;

class MockImageDecoderFactory : public ImageDecoderFactory {
public:
    static PassOwnPtr<MockImageDecoderFactory> create(ImageFrameGeneratorTest* test)
    {
        return adoptPtr(new MockImageDecoderFactory(test));
    }

    virtual PassOwnPtr<ImageDecoder> create();

private:
    MockImageDecoderFactory(ImageFrameGeneratorTest* test)
        : m_test(test)
    {
    }

    ImageFrameGeneratorTest* m_test;
};

class ImageFrameGeneratorTest : public ::testing::Test, public MockImageDecoderClient {
public:
    virtual void SetUp()
    {
        ImageDecodingStore::initializeOnce();
        m_data = SharedBuffer::create();
        m_generator = ImageFrameGenerator::create(fullSize(), m_data, true);
        m_generator->setImageDecoderFactoryForTesting(MockImageDecoderFactory::create(this));
        m_decodersDestroyed = 0;
        m_frameBufferRequestCount = 0;
        m_frameStatus = ImageFrame::FrameEmpty;
    }

    virtual void TearDown()
    {
        ImageDecodingStore::shutdown();
    }

    virtual void decoderBeingDestroyed()
    {
        ++m_decodersDestroyed;
    }

    virtual void frameBufferRequested()
    {
        ++m_frameBufferRequestCount;
    }

    virtual ImageFrame::FrameStatus frameStatus()
    {
        return m_frameStatus;
    }

protected:
    PassOwnPtr<ScaledImageFragment> createCompleteImage(const SkISize& size)
    {
        SkBitmap bitmap;
        bitmap.setConfig(SkBitmap::kARGB_8888_Config, size.width(), size.height());
        bitmap.allocPixels();
        return ScaledImageFragment::createComplete(size, 0, bitmap);
    }

    void addNewData()
    {
        m_data->append("g", 1);
        m_generator->setData(m_data, false);
    }

    void setFrameStatus(ImageFrame::FrameStatus status)  { m_frameStatus = status; }

    RefPtr<SharedBuffer> m_data;
    RefPtr<ImageFrameGenerator> m_generator;
    int m_decodersDestroyed;
    int m_frameBufferRequestCount;
    ImageFrame::FrameStatus m_frameStatus;
};

PassOwnPtr<ImageDecoder> MockImageDecoderFactory::create()
{
    OwnPtr<MockImageDecoder> decoder = MockImageDecoder::create(m_test);
    decoder->setSize(fullSize().width(), fullSize().height());
    decoder->setFrameHasAlpha(false);
    return decoder.release();
}

TEST_F(ImageFrameGeneratorTest, cacheHit)
{
    const ScaledImageFragment* fullImage = ImageDecodingStore::instance()->insertAndLockCache(
        m_generator.get(), createCompleteImage(fullSize()));
    EXPECT_EQ(fullSize(), fullImage->scaledSize());
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), fullImage);

    const ScaledImageFragment* tempImage = m_generator->decodeAndScale(fullSize());
    EXPECT_EQ(fullImage, tempImage);
    EXPECT_EQ(fullSize(), tempImage->scaledSize());
    EXPECT_TRUE(m_generator->hasAlpha());
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    EXPECT_EQ(0, m_frameBufferRequestCount);
}

TEST_F(ImageFrameGeneratorTest, cacheMissWithScale)
{
    const ScaledImageFragment* fullImage = ImageDecodingStore::instance()->insertAndLockCache(
        m_generator.get(), createCompleteImage(fullSize()));
    EXPECT_EQ(fullSize(), fullImage->scaledSize());
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), fullImage);

    // Cache miss because of scaled size not found.
    const ScaledImageFragment* scaledImage = m_generator->decodeAndScale(scaledSize());
    EXPECT_NE(fullImage, scaledImage);
    EXPECT_EQ(scaledSize(), scaledImage->scaledSize());
    EXPECT_TRUE(m_generator->hasAlpha());
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), scaledImage);

    // Cache hit.
    const ScaledImageFragment* tempImage = m_generator->decodeAndScale(scaledSize());
    EXPECT_EQ(scaledImage, tempImage);
    EXPECT_EQ(scaledSize(), tempImage->scaledSize());
    EXPECT_TRUE(m_generator->hasAlpha());
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    EXPECT_EQ(0, m_frameBufferRequestCount);
}

TEST_F(ImageFrameGeneratorTest, cacheMissWithDecodeAndScale)
{
    setFrameStatus(ImageFrame::FrameComplete);

    // Cache miss.
    const ScaledImageFragment* scaledImage = m_generator->decodeAndScale(scaledSize());
    EXPECT_EQ(1, m_frameBufferRequestCount);
    EXPECT_EQ(scaledSize(), scaledImage->scaledSize());
    EXPECT_FALSE(m_generator->hasAlpha());
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), scaledImage);
    EXPECT_EQ(1, m_decodersDestroyed);

    // Cache hit.
    const ScaledImageFragment* fullImage = m_generator->decodeAndScale(fullSize());
    EXPECT_NE(scaledImage, fullImage);
    EXPECT_EQ(fullSize(), fullImage->scaledSize());
    EXPECT_FALSE(m_generator->hasAlpha());
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), fullImage);

    // Cache hit.
    const ScaledImageFragment* tempImage = m_generator->decodeAndScale(scaledSize());
    EXPECT_EQ(scaledImage, tempImage);
    EXPECT_EQ(scaledSize(), tempImage->scaledSize());
    EXPECT_FALSE(m_generator->hasAlpha());
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    EXPECT_EQ(1, m_frameBufferRequestCount);
}

TEST_F(ImageFrameGeneratorTest, cacheMissWithIncompleteDecode)
{
    setFrameStatus(ImageFrame::FramePartial);

    const ScaledImageFragment* tempImage= m_generator->decodeAndScale(fullSize());
    EXPECT_FALSE(tempImage->isComplete());
    EXPECT_EQ(1, m_frameBufferRequestCount);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    EXPECT_EQ(2u, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(1u, ImageDecodingStore::instance()->imageCacheEntries());
    EXPECT_EQ(1u, ImageDecodingStore::instance()->decoderCacheEntries());

    addNewData();
    tempImage = m_generator->decodeAndScale(fullSize());
    EXPECT_FALSE(tempImage->isComplete());
    EXPECT_EQ(2, m_frameBufferRequestCount);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    EXPECT_EQ(3u, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(2u, ImageDecodingStore::instance()->imageCacheEntries());
    EXPECT_EQ(1u, ImageDecodingStore::instance()->decoderCacheEntries());
    EXPECT_EQ(0, m_decodersDestroyed);
}

TEST_F(ImageFrameGeneratorTest, cacheMissWithIncompleteDecodeAndScale)
{
    setFrameStatus(ImageFrame::FramePartial);

    const ScaledImageFragment* tempImage= m_generator->decodeAndScale(scaledSize());
    EXPECT_FALSE(tempImage->isComplete());
    EXPECT_EQ(1, m_frameBufferRequestCount);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    EXPECT_EQ(3u, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(2u, ImageDecodingStore::instance()->imageCacheEntries());
    EXPECT_EQ(1u, ImageDecodingStore::instance()->decoderCacheEntries());

    addNewData();
    tempImage = m_generator->decodeAndScale(scaledSize());
    EXPECT_FALSE(tempImage->isComplete());
    EXPECT_EQ(2, m_frameBufferRequestCount);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    EXPECT_EQ(5u, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(4u, ImageDecodingStore::instance()->imageCacheEntries());
    EXPECT_EQ(1u, ImageDecodingStore::instance()->decoderCacheEntries());
    EXPECT_EQ(0, m_decodersDestroyed);
}

TEST_F(ImageFrameGeneratorTest, incompleteDecodeBecomesComplete)
{
    setFrameStatus(ImageFrame::FramePartial);

    const ScaledImageFragment* tempImage = m_generator->decodeAndScale(fullSize());
    EXPECT_FALSE(tempImage->isComplete());
    EXPECT_EQ(1, m_frameBufferRequestCount);
    EXPECT_EQ(0, m_decodersDestroyed);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    EXPECT_EQ(2u, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(1u, ImageDecodingStore::instance()->imageCacheEntries());
    EXPECT_EQ(1u, ImageDecodingStore::instance()->decoderCacheEntries());

    setFrameStatus(ImageFrame::FrameComplete);
    addNewData();

    tempImage = m_generator->decodeAndScale(fullSize());
    EXPECT_TRUE(tempImage->isComplete());
    EXPECT_EQ(2, m_frameBufferRequestCount);
    EXPECT_EQ(1, m_decodersDestroyed);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    EXPECT_EQ(2u, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(2u, ImageDecodingStore::instance()->imageCacheEntries());
    EXPECT_EQ(0u, ImageDecodingStore::instance()->decoderCacheEntries());

    tempImage = m_generator->decodeAndScale(fullSize());
    EXPECT_TRUE(tempImage->isComplete());
    EXPECT_EQ(2, m_frameBufferRequestCount);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
}

TEST_F(ImageFrameGeneratorTest, incompleteDecodeAndScaleBecomesComplete)
{
    setFrameStatus(ImageFrame::FramePartial);

    const ScaledImageFragment* tempImage = m_generator->decodeAndScale(scaledSize());
    EXPECT_FALSE(tempImage->isComplete());
    EXPECT_EQ(1, m_frameBufferRequestCount);
    EXPECT_EQ(0, m_decodersDestroyed);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    EXPECT_EQ(3u, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(2u, ImageDecodingStore::instance()->imageCacheEntries());
    EXPECT_EQ(1u, ImageDecodingStore::instance()->decoderCacheEntries());

    setFrameStatus(ImageFrame::FrameComplete);
    addNewData();

    tempImage = m_generator->decodeAndScale(scaledSize());
    EXPECT_TRUE(tempImage->isComplete());
    EXPECT_EQ(2, m_frameBufferRequestCount);
    EXPECT_EQ(1, m_decodersDestroyed);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    EXPECT_EQ(4u, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(4u, ImageDecodingStore::instance()->imageCacheEntries());
    EXPECT_EQ(0u, ImageDecodingStore::instance()->decoderCacheEntries());

    tempImage = m_generator->decodeAndScale(scaledSize());
    EXPECT_TRUE(tempImage->isComplete());
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);

    tempImage = m_generator->decodeAndScale(fullSize());
    EXPECT_TRUE(tempImage->isComplete());
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);

    EXPECT_EQ(2, m_frameBufferRequestCount);
}

static void decodeThreadMain(void* arg)
{
    ImageFrameGenerator* generator = reinterpret_cast<ImageFrameGenerator*>(arg);
    const ScaledImageFragment* tempImage = generator->decodeAndScale(fullSize());
    ImageDecodingStore::instance()->unlockCache(generator, tempImage);
}

TEST_F(ImageFrameGeneratorTest, incompleteDecodeBecomesCompleteMultiThreaded)
{
    setFrameStatus(ImageFrame::FramePartial);

    const ScaledImageFragment* tempImage = m_generator->decodeAndScale(fullSize());
    EXPECT_FALSE(tempImage->isComplete());
    EXPECT_EQ(1, m_frameBufferRequestCount);
    EXPECT_EQ(0, m_decodersDestroyed);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    EXPECT_EQ(2u, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(1u, ImageDecodingStore::instance()->imageCacheEntries());
    EXPECT_EQ(1u, ImageDecodingStore::instance()->decoderCacheEntries());

    // Frame can now be decoded completely.
    setFrameStatus(ImageFrame::FrameComplete);
    addNewData();
    ThreadIdentifier threadID = createThread(&decodeThreadMain, m_generator.get(), "DecodeThread");
    waitForThreadCompletion(threadID);

    EXPECT_EQ(2, m_frameBufferRequestCount);
    EXPECT_EQ(1, m_decodersDestroyed);
    EXPECT_EQ(2u, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(2u, ImageDecodingStore::instance()->imageCacheEntries());
    EXPECT_EQ(0u, ImageDecodingStore::instance()->decoderCacheEntries());

    tempImage = m_generator->decodeAndScale(fullSize());
    EXPECT_TRUE(tempImage->isComplete());
    EXPECT_EQ(2, m_frameBufferRequestCount);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
}

TEST_F(ImageFrameGeneratorTest, concurrentIncompleteDecodeAndScale)
{
    setFrameStatus(ImageFrame::FramePartial);

    const ScaledImageFragment* fullImage = m_generator->decodeAndScale(fullSize());
    const ScaledImageFragment* scaledImage = m_generator->decodeAndScale(scaledSize());
    EXPECT_FALSE(fullImage->isComplete());
    EXPECT_FALSE(scaledImage->isComplete());
    EXPECT_EQ(2, m_frameBufferRequestCount);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), fullImage);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), scaledImage);
    EXPECT_EQ(4u, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(3u, ImageDecodingStore::instance()->imageCacheEntries());
    EXPECT_EQ(1u, ImageDecodingStore::instance()->decoderCacheEntries());
    EXPECT_EQ(0, m_decodersDestroyed);

    addNewData();
    setFrameStatus(ImageFrame::FrameComplete);
    scaledImage = m_generator->decodeAndScale(scaledSize());
    EXPECT_TRUE(scaledImage->isComplete());
    EXPECT_EQ(3, m_frameBufferRequestCount);
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), scaledImage);
    EXPECT_EQ(5u, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(5u, ImageDecodingStore::instance()->imageCacheEntries());
    EXPECT_EQ(0u, ImageDecodingStore::instance()->decoderCacheEntries());
    EXPECT_EQ(1, m_decodersDestroyed);
}

TEST_F(ImageFrameGeneratorTest, incompleteBitmapCopied)
{
    setFrameStatus(ImageFrame::FramePartial);

    const ScaledImageFragment* tempImage= m_generator->decodeAndScale(fullSize());
    EXPECT_FALSE(tempImage->isComplete());
    EXPECT_EQ(1, m_frameBufferRequestCount);

    ImageDecoder* tempDecoder = 0;
    EXPECT_TRUE(ImageDecodingStore::instance()->lockDecoder(m_generator.get(), fullSize(), &tempDecoder));
    ASSERT_TRUE(tempDecoder);
    EXPECT_NE(tempDecoder->frameBufferAtIndex(0)->getSkBitmap().getPixels(), tempImage->bitmap().getPixels());
    ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
    ImageDecodingStore::instance()->unlockDecoder(m_generator.get(), tempDecoder);
}

} // namespace