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/*
* Copyright (C) 2016 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 "ImageFrame.h"
#include <wtf/NeverDestroyed.h>
namespace WebCore {
ImageFrame::ImageFrame()
{
}
ImageFrame::~ImageFrame()
{
clearImage();
}
const ImageFrame& ImageFrame::defaultFrame()
{
static NeverDestroyed<ImageFrame> sharedInstance;
return sharedInstance;
}
ImageFrame& ImageFrame::operator=(const ImageFrame& other)
{
if (this == &other)
return *this;
m_decoding = other.m_decoding;
m_size = other.m_size;
#if !USE(CG)
if (other.backingStore())
initialize(*other.backingStore());
else
m_backingStore = nullptr;
m_disposalMethod = other.m_disposalMethod;
#endif
m_nativeImage = other.m_nativeImage;
m_subsamplingLevel = other.m_subsamplingLevel;
m_sizeForDrawing = other.m_sizeForDrawing;
m_orientation = other.m_orientation;
m_duration = other.m_duration;
m_hasAlpha = other.m_hasAlpha;
return *this;
}
unsigned ImageFrame::clearImage()
{
#if !USE(CG)
if (hasBackingStore())
m_backingStore = nullptr;
#endif
if (!hasNativeImage())
return 0;
unsigned frameBytes = this->frameBytes();
clearNativeImageSubimages(m_nativeImage);
m_nativeImage = nullptr;
return frameBytes;
}
unsigned ImageFrame::clear()
{
unsigned frameBytes = clearImage();
*this = ImageFrame();
return frameBytes;
}
#if !USE(CG)
bool ImageFrame::initialize(const ImageBackingStore& backingStore)
{
if (&backingStore == this->backingStore())
return true;
m_backingStore = ImageBackingStore::create(backingStore);
return m_backingStore != nullptr;
}
bool ImageFrame::initialize(const IntSize& size, bool premultiplyAlpha)
{
if (size.isEmpty())
return false;
m_backingStore = ImageBackingStore::create(size, premultiplyAlpha);
return m_backingStore != nullptr;
}
#endif
IntSize ImageFrame::size() const
{
#if !USE(CG)
if (hasBackingStore())
return backingStore()->size();
#endif
return m_size;
}
static int maxDimension(const IntSize& size)
{
return std::max(size.width(), size.height());
}
bool ImageFrame::isBeingDecoded(const std::optional<IntSize>& sizeForDrawing) const
{
if (!m_sizeForDecoding.size())
return false;
if (!sizeForDrawing)
return true;
// Return true if the ImageFrame will be decoded eventually with a suitable sizeForDecoding.
return maxDimension(m_sizeForDecoding.last()) >= maxDimension(*sizeForDrawing);
}
bool ImageFrame::hasValidNativeImage(const std::optional<SubsamplingLevel>& subsamplingLevel, const std::optional<IntSize>& sizeForDrawing) const
{
ASSERT_IMPLIES(!subsamplingLevel, !sizeForDrawing);
if (!hasNativeImage())
return false;
// The caller does not care about subsamplingLevel or sizeForDrawing. The current NativeImage is fine.
if (!subsamplingLevel)
return true;
if (*subsamplingLevel < m_subsamplingLevel)
return false;
// The NativeImage was decoded with the native size. So it is valid for any size.
if (!m_sizeForDrawing)
return true;
// The NativeImage was decoded for a specific size. The two sizeForDrawings have to match.
return sizeForDrawing && maxDimension(*m_sizeForDrawing) >= maxDimension(*sizeForDrawing);
}
Color ImageFrame::singlePixelSolidColor() const
{
if (!hasNativeImage() || m_size != IntSize(1, 1))
return Color();
return nativeImageSinglePixelSolidColor(m_nativeImage);
}
}
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