flutter_flutter/sky/engine/platform/graphics/ImageDecodingStoreTest.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * 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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#include "sky/engine/platform/graphics/ImageDecodingStore.h"

#include <gtest/gtest.h>
#include "sky/engine/platform/SharedBuffer.h"
#include "sky/engine/platform/graphics/ImageFrameGenerator.h"
#include "sky/engine/platform/graphics/test/MockImageDecoder.h"

using namespace blink;

namespace {

class ImageDecodingStoreTest : public ::testing::Test, public MockImageDecoderClient {
public:
    void SetUp() override
    {
        ImageDecodingStore::instance()->setCacheLimitInBytes(1024 * 1024);
        m_data = SharedBuffer::create();
        m_generator = ImageFrameGenerator::create(SkISize::Make(100, 100), m_data, true);
        m_decodersDestroyed = 0;
    }

    void TearDown() override
    {
        ImageDecodingStore::instance()->clear();
    }

    void decoderBeingDestroyed() override
    {
        ++m_decodersDestroyed;
    }

    void frameBufferRequested() override
    {
        // Decoder is never used by ImageDecodingStore.
        ASSERT_TRUE(false);
    }

    virtual ImageFrame::Status status()
    {
        return ImageFrame::FramePartial;
    }

    virtual size_t frameCount() { return 1; }
    virtual int repetitionCount() const { return cAnimationNone; }
    virtual float frameDuration() const { return 0; }

protected:
    void evictOneCache()
    {
        size_t memoryUsageInBytes = ImageDecodingStore::instance()->memoryUsageInBytes();
        if (memoryUsageInBytes)
            ImageDecodingStore::instance()->setCacheLimitInBytes(memoryUsageInBytes - 1);
        else
            ImageDecodingStore::instance()->setCacheLimitInBytes(0);
    }

    RefPtr<SharedBuffer> m_data;
    RefPtr<ImageFrameGenerator> m_generator;
    int m_decodersDestroyed;
};

TEST_F(ImageDecodingStoreTest, insertDecoder)
{
    const SkISize size = SkISize::Make(1, 1);
    OwnPtr<ImageDecoder> decoder = MockImageDecoder::create(this);
    decoder->setSize(1, 1);
    const ImageDecoder* refDecoder = decoder.get();
    ImageDecodingStore::instance()->insertDecoder(m_generator.get(), decoder.release());
    EXPECT_EQ(1, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(4u, ImageDecodingStore::instance()->memoryUsageInBytes());

    ImageDecoder* testDecoder;
    EXPECT_TRUE(ImageDecodingStore::instance()->lockDecoder(m_generator.get(), size, &testDecoder));
    EXPECT_TRUE(testDecoder);
    EXPECT_EQ(refDecoder, testDecoder);
    ImageDecodingStore::instance()->unlockDecoder(m_generator.get(), testDecoder);
    EXPECT_EQ(1, ImageDecodingStore::instance()->cacheEntries());
}

TEST_F(ImageDecodingStoreTest, evictDecoder)
{
    OwnPtr<ImageDecoder> decoder1 = MockImageDecoder::create(this);
    OwnPtr<ImageDecoder> decoder2 = MockImageDecoder::create(this);
    OwnPtr<ImageDecoder> decoder3 = MockImageDecoder::create(this);
    decoder1->setSize(1, 1);
    decoder2->setSize(2, 2);
    decoder3->setSize(3, 3);
    ImageDecodingStore::instance()->insertDecoder(m_generator.get(), decoder1.release());
    ImageDecodingStore::instance()->insertDecoder(m_generator.get(), decoder2.release());
    ImageDecodingStore::instance()->insertDecoder(m_generator.get(), decoder3.release());
    EXPECT_EQ(3, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(56u, ImageDecodingStore::instance()->memoryUsageInBytes());

    evictOneCache();
    EXPECT_EQ(2, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(52u, ImageDecodingStore::instance()->memoryUsageInBytes());

    evictOneCache();
    EXPECT_EQ(1, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(36u, ImageDecodingStore::instance()->memoryUsageInBytes());

    evictOneCache();
    EXPECT_FALSE(ImageDecodingStore::instance()->cacheEntries());
    EXPECT_FALSE(ImageDecodingStore::instance()->memoryUsageInBytes());
}

TEST_F(ImageDecodingStoreTest, decoderInUseNotEvicted)
{
    OwnPtr<ImageDecoder> decoder1 = MockImageDecoder::create(this);
    OwnPtr<ImageDecoder> decoder2 = MockImageDecoder::create(this);
    OwnPtr<ImageDecoder> decoder3 = MockImageDecoder::create(this);
    decoder1->setSize(1, 1);
    decoder2->setSize(2, 2);
    decoder3->setSize(3, 3);
    ImageDecodingStore::instance()->insertDecoder(m_generator.get(), decoder1.release());
    ImageDecodingStore::instance()->insertDecoder(m_generator.get(), decoder2.release());
    ImageDecodingStore::instance()->insertDecoder(m_generator.get(), decoder3.release());
    EXPECT_EQ(3, ImageDecodingStore::instance()->cacheEntries());

    ImageDecoder* testDecoder;
    EXPECT_TRUE(ImageDecodingStore::instance()->lockDecoder(m_generator.get(), SkISize::Make(2, 2), &testDecoder));

    evictOneCache();
    evictOneCache();
    evictOneCache();
    EXPECT_EQ(1, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(16u, ImageDecodingStore::instance()->memoryUsageInBytes());

    ImageDecodingStore::instance()->unlockDecoder(m_generator.get(), testDecoder);
    evictOneCache();
    EXPECT_FALSE(ImageDecodingStore::instance()->cacheEntries());
    EXPECT_FALSE(ImageDecodingStore::instance()->memoryUsageInBytes());
}

TEST_F(ImageDecodingStoreTest, removeDecoder)
{
    const SkISize size = SkISize::Make(1, 1);
    OwnPtr<ImageDecoder> decoder = MockImageDecoder::create(this);
    decoder->setSize(1, 1);
    const ImageDecoder* refDecoder = decoder.get();
    ImageDecodingStore::instance()->insertDecoder(m_generator.get(), decoder.release());
    EXPECT_EQ(1, ImageDecodingStore::instance()->cacheEntries());
    EXPECT_EQ(4u, ImageDecodingStore::instance()->memoryUsageInBytes());

    ImageDecoder* testDecoder;
    EXPECT_TRUE(ImageDecodingStore::instance()->lockDecoder(m_generator.get(), size, &testDecoder));
    EXPECT_TRUE(testDecoder);
    EXPECT_EQ(refDecoder, testDecoder);
    ImageDecodingStore::instance()->removeDecoder(m_generator.get(), testDecoder);
    EXPECT_FALSE(ImageDecodingStore::instance()->cacheEntries());

    EXPECT_FALSE(ImageDecodingStore::instance()->lockDecoder(m_generator.get(), size, &testDecoder));
}

} // namespace