зеркало из https://github.com/mozilla/gecko-dev.git
104 строки
3.1 KiB
C++
104 строки
3.1 KiB
C++
/* -*- 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
|