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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "SurfacePipe.h"
#include <utility>
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/DebugOnly.h"
#include "Decoder.h"
namespace mozilla {
namespace image {
using namespace gfx;
using std::min;
/* static */ UniquePtr<NullSurfaceSink> NullSurfaceSink::sSingleton;
/* static */ NullSurfaceSink*
NullSurfaceSink::Singleton()
{
if (!sSingleton) {
MOZ_ASSERT(NS_IsMainThread());
sSingleton = MakeUnique<NullSurfaceSink>();
ClearOnShutdown(&sSingleton);
DebugOnly<nsresult> rv = sSingleton->Configure(NullSurfaceConfig { });
MOZ_ASSERT(NS_SUCCEEDED(rv), "Couldn't configure a NullSurfaceSink?");
}
return sSingleton.get();
}
nsresult
NullSurfaceSink::Configure(const NullSurfaceConfig& aConfig)
{
// Note that the choice of uint32_t as the pixel size here is more or less
// arbitrary, since you cannot write to a NullSurfaceSink anyway, but uint32_t
// is a natural choice since most SurfacePipes will be for BGRA/BGRX surfaces.
ConfigureFilter(IntSize(), sizeof(uint32_t));
return NS_OK;
}
Maybe<SurfaceInvalidRect>
AbstractSurfaceSink::TakeInvalidRect()
{
if (mInvalidRect.IsEmpty()) {
return Nothing();
}
SurfaceInvalidRect invalidRect;
invalidRect.mInputSpaceRect = invalidRect.mOutputSpaceRect = mInvalidRect;
// Forget about the invalid rect we're returning.
mInvalidRect = IntRect();
return Some(invalidRect);
}
uint8_t*
AbstractSurfaceSink::DoResetToFirstRow()
{
mRow = 0;
return GetRowPointer();
}
uint8_t*
AbstractSurfaceSink::DoAdvanceRow()
{
if (mRow >= uint32_t(InputSize().height)) {
return nullptr;
}
// If we're vertically flipping the output, we need to flip the invalid rect. Since we're
// dealing with an axis-aligned rect, only the y coordinate needs to change.
int32_t invalidY = mFlipVertically
? InputSize().height - (mRow + 1)
: mRow;
mInvalidRect.UnionRect(mInvalidRect,
IntRect(0, invalidY, InputSize().width, 1));
mRow = min(uint32_t(InputSize().height), mRow + 1);
return mRow < uint32_t(InputSize().height) ? GetRowPointer()
: nullptr;
}
nsresult
SurfaceSink::Configure(const SurfaceConfig& aConfig)
{
// For non-paletted surfaces, the surface size is just the output size.
IntSize surfaceSize = aConfig.mOutputSize;
// Non-paletted surfaces should not have frame rects, so we just pass
// AllocateFrame() a frame rect which covers the entire surface.
IntRect frameRect(0, 0, surfaceSize.width, surfaceSize.height);
// Allocate the frame.
// XXX(seth): Once every Decoder subclass uses SurfacePipe, we probably want
// to allocate the frame directly here and get rid of Decoder::AllocateFrame
// altogether.
nsresult rv = aConfig.mDecoder->AllocateFrame(surfaceSize,
frameRect,
aConfig.mFormat,
/* aPaletteDepth */ 0,
aConfig.mAnimParams);
if (NS_FAILED(rv)) {
return rv;
}
mImageData = aConfig.mDecoder->mImageData;
mImageDataLength = aConfig.mDecoder->mImageDataLength;
mFlipVertically = aConfig.mFlipVertically;
MOZ_ASSERT(mImageData);
MOZ_ASSERT(mImageDataLength ==
uint32_t(surfaceSize.width * surfaceSize.height * sizeof(uint32_t)));
ConfigureFilter(surfaceSize, sizeof(uint32_t));
return NS_OK;
}
uint8_t*
SurfaceSink::GetRowPointer() const
{
// If we're flipping vertically, reverse the order in which we traverse the
// rows.
uint32_t row = mFlipVertically
? InputSize().height - (mRow + 1)
: mRow;
uint8_t* rowPtr = mImageData + row * InputSize().width * sizeof(uint32_t);
MOZ_ASSERT(rowPtr >= mImageData);
MOZ_ASSERT(rowPtr < mImageData + mImageDataLength);
MOZ_ASSERT(rowPtr + InputSize().width * sizeof(uint32_t) <=
mImageData + mImageDataLength);
return rowPtr;
}
nsresult
PalettedSurfaceSink::Configure(const PalettedSurfaceConfig& aConfig)
{
// For paletted surfaces, the surface size is the size of the frame rect.
IntSize surfaceSize = aConfig.mFrameRect.Size();
// Allocate the frame.
// XXX(seth): Once every Decoder subclass uses SurfacePipe, we probably want
// to allocate the frame directly here and get rid of Decoder::AllocateFrame
// altogether.
nsresult rv = aConfig.mDecoder->AllocateFrame(aConfig.mOutputSize,
aConfig.mFrameRect,
aConfig.mFormat,
aConfig.mPaletteDepth,
aConfig.mAnimParams);
if (NS_FAILED(rv)) {
return rv;
}
mImageData = aConfig.mDecoder->mImageData;
mImageDataLength = aConfig.mDecoder->mImageDataLength;
mFlipVertically = aConfig.mFlipVertically;
mFrameRect = aConfig.mFrameRect;
MOZ_ASSERT(mImageData);
MOZ_ASSERT(mImageDataLength ==
uint32_t(mFrameRect.width * mFrameRect.height * sizeof(uint8_t)));
ConfigureFilter(surfaceSize, sizeof(uint8_t));
return NS_OK;
}
uint8_t*
PalettedSurfaceSink::GetRowPointer() const
{
// If we're flipping vertically, reverse the order in which we traverse the
// rows.
uint32_t row = mFlipVertically
? InputSize().height - (mRow + 1)
: mRow;
uint8_t* rowPtr = mImageData + row * InputSize().width * sizeof(uint8_t);
MOZ_ASSERT(rowPtr >= mImageData);
MOZ_ASSERT(rowPtr < mImageData + mImageDataLength);
MOZ_ASSERT(rowPtr + InputSize().width * sizeof(uint8_t) <=
mImageData + mImageDataLength);
return rowPtr;
}
} // namespace image
} // namespace mozilla
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