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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 <algorithm> // for min
#include "Decoder.h"
namespace mozilla {
namespace image {
using namespace gfx;
using std::min;
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::DoAdvanceRowFromBuffer(const uint8_t* aInputRow) {
CopyInputRow(aInputRow);
return DoAdvanceRow();
}
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) {
IntSize surfaceSize = aConfig.mOutputSize;
// 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, aConfig.mFormat,
aConfig.mAnimParams);
if (NS_FAILED(rv)) {
return rv;
}
mImageData = aConfig.mDecoder->mImageData;
mImageDataLength = aConfig.mDecoder->mImageDataLength;
mFlipVertically = aConfig.mFlipVertically;
MOZ_ASSERT(mImageData);
MOZ_ASSERT(uint64_t(mImageDataLength) == uint64_t(surfaceSize.width) *
uint64_t(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;
}
} // namespace image
} // namespace mozilla
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