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7b2fde0d05
Some filters can do the copy of the given data into the working buffer as part of the filter operation. For those that cannot, we will just copy the data first, and then advance the row. Differential Revision: https://phabricator.services.mozilla.com/D46448 --HG-- extra : moz-landing-system : lando
104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "SurfacePipe.h"
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#include <algorithm> // for min
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#include "Decoder.h"
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namespace mozilla {
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namespace image {
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using namespace gfx;
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using std::min;
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Maybe<SurfaceInvalidRect> AbstractSurfaceSink::TakeInvalidRect() {
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if (mInvalidRect.IsEmpty()) {
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return Nothing();
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}
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SurfaceInvalidRect invalidRect;
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invalidRect.mInputSpaceRect = invalidRect.mOutputSpaceRect = mInvalidRect;
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// Forget about the invalid rect we're returning.
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mInvalidRect = IntRect();
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return Some(invalidRect);
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}
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uint8_t* AbstractSurfaceSink::DoResetToFirstRow() {
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mRow = 0;
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return GetRowPointer();
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}
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uint8_t* AbstractSurfaceSink::DoAdvanceRowFromBuffer(const uint8_t* aInputRow) {
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CopyInputRow(aInputRow);
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return DoAdvanceRow();
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}
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uint8_t* AbstractSurfaceSink::DoAdvanceRow() {
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if (mRow >= uint32_t(InputSize().height)) {
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return nullptr;
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}
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// If we're vertically flipping the output, we need to flip the invalid rect.
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// Since we're dealing with an axis-aligned rect, only the y coordinate needs
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// to change.
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int32_t invalidY = mFlipVertically ? InputSize().height - (mRow + 1) : mRow;
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mInvalidRect.UnionRect(mInvalidRect,
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IntRect(0, invalidY, InputSize().width, 1));
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mRow = min(uint32_t(InputSize().height), mRow + 1);
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return mRow < uint32_t(InputSize().height) ? GetRowPointer() : nullptr;
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}
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nsresult SurfaceSink::Configure(const SurfaceConfig& aConfig) {
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IntSize surfaceSize = aConfig.mOutputSize;
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// Allocate the frame.
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// XXX(seth): Once every Decoder subclass uses SurfacePipe, we probably want
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// to allocate the frame directly here and get rid of Decoder::AllocateFrame
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// altogether.
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nsresult rv = aConfig.mDecoder->AllocateFrame(surfaceSize, aConfig.mFormat,
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aConfig.mAnimParams);
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if (NS_FAILED(rv)) {
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return rv;
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}
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mImageData = aConfig.mDecoder->mImageData;
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mImageDataLength = aConfig.mDecoder->mImageDataLength;
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mFlipVertically = aConfig.mFlipVertically;
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MOZ_ASSERT(mImageData);
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MOZ_ASSERT(uint64_t(mImageDataLength) == uint64_t(surfaceSize.width) *
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uint64_t(surfaceSize.height) *
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sizeof(uint32_t));
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ConfigureFilter(surfaceSize, sizeof(uint32_t));
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return NS_OK;
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}
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uint8_t* SurfaceSink::GetRowPointer() const {
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// If we're flipping vertically, reverse the order in which we traverse the
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// rows.
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uint32_t row = mFlipVertically ? InputSize().height - (mRow + 1) : mRow;
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uint8_t* rowPtr = mImageData + row * InputSize().width * sizeof(uint32_t);
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MOZ_ASSERT(rowPtr >= mImageData);
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MOZ_ASSERT(rowPtr < mImageData + mImageDataLength);
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MOZ_ASSERT(rowPtr + InputSize().width * sizeof(uint32_t) <=
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mImageData + mImageDataLength);
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return rowPtr;
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}
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} // namespace image
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} // namespace mozilla
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