82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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 "SourceSurfaceRawData.h"
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#include "DataSurfaceHelpers.h"
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#include "Logging.h"
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#include "mozilla/Types.h" // for decltype
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namespace mozilla {
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namespace gfx {
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void
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SourceSurfaceRawData::InitWrappingData(uint8_t *aData,
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const IntSize &aSize,
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int32_t aStride,
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SurfaceFormat aFormat,
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Factory::SourceSurfaceDeallocator aDeallocator,
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void* aClosure)
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{
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mRawData = aData;
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mSize = aSize;
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mStride = aStride;
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mFormat = aFormat;
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if (aDeallocator) {
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mOwnData = true;
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}
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mDeallocator = aDeallocator;
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mClosure = aClosure;
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}
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void
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SourceSurfaceRawData::GuaranteePersistance()
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{
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if (mOwnData) {
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return;
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}
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uint8_t* oldData = mRawData;
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mRawData = new uint8_t[mStride * mSize.height];
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memcpy(mRawData, oldData, mStride * mSize.height);
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mOwnData = true;
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}
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bool
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SourceSurfaceAlignedRawData::Init(const IntSize &aSize,
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SurfaceFormat aFormat,
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bool aClearMem,
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uint8_t aClearValue,
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int32_t aStride)
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{
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mFormat = aFormat;
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mStride = aStride ? aStride : GetAlignedStride<16>(aSize.width, BytesPerPixel(aFormat));
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size_t bufLen = BufferSizeFromStrideAndHeight(mStride, aSize.height);
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if (bufLen > 0) {
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bool zeroMem = aClearMem && !aClearValue;
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static_assert(sizeof(decltype(mArray[0])) == 1,
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"mArray.Realloc() takes an object count, so its objects must be 1-byte sized if we use bufLen");
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// AlignedArray uses cmalloc to zero mem for a fast path.
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mArray.Realloc(/* actually an object count */ bufLen, zeroMem);
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mSize = aSize;
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if (mArray && aClearMem && aClearValue) {
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memset(mArray, aClearValue, mStride * aSize.height);
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}
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} else {
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mArray.Dealloc();
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mSize.SizeTo(0, 0);
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}
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return mArray != nullptr;
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}
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} // namespace gfx
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} // namespace mozilla
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