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135 lines
3.7 KiB
C++
135 lines
3.7 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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#ifndef MOZILLA_GFX_SOURCESURFACERAWDATA_H_
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#define MOZILLA_GFX_SOURCESURFACERAWDATA_H_
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#include "2D.h"
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#include "Tools.h"
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#include "mozilla/Atomics.h"
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namespace mozilla {
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namespace gfx {
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class SourceSurfaceRawData : public DataSourceSurface
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{
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceRawData, override)
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SourceSurfaceRawData()
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: mMapCount(0)
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{}
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~SourceSurfaceRawData()
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{
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if(mOwnData) delete [] mRawData;
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MOZ_ASSERT(mMapCount == 0);
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}
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virtual uint8_t *GetData() override { return mRawData; }
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virtual int32_t Stride() override { return mStride; }
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virtual SurfaceType GetType() const override { return SurfaceType::DATA; }
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virtual IntSize GetSize() const override { return mSize; }
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virtual SurfaceFormat GetFormat() const override { return mFormat; }
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void InitWrappingData(unsigned char *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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bool aOwnData);
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virtual void GuaranteePersistance() override;
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// Althought Map (and Moz2D in general) isn't normally threadsafe,
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// we want to allow it for SourceSurfaceRawData since it should
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// always be fine (for reading at least).
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//
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// This is the same as the base class implementation except using
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// mMapCount instead of mIsMapped since that breaks for multithread.
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//
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// Once mfbt supports Monitors we should implement proper read/write
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// locking to prevent write races.
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virtual bool Map(MapType, MappedSurface *aMappedSurface) override
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{
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aMappedSurface->mData = GetData();
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aMappedSurface->mStride = Stride();
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bool success = !!aMappedSurface->mData;
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if (success) {
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mMapCount++;
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}
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return success;
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}
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virtual void Unmap() override
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{
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mMapCount--;
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MOZ_ASSERT(mMapCount >= 0);
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}
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private:
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uint8_t *mRawData;
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int32_t mStride;
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SurfaceFormat mFormat;
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IntSize mSize;
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Atomic<int32_t> mMapCount;
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bool mOwnData;
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};
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class SourceSurfaceAlignedRawData : public DataSourceSurface
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{
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceAlignedRawData, override)
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SourceSurfaceAlignedRawData()
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: mMapCount(0)
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{}
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~SourceSurfaceAlignedRawData()
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{
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MOZ_ASSERT(mMapCount == 0);
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}
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virtual uint8_t *GetData() override { return mArray; }
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virtual int32_t Stride() override { return mStride; }
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virtual SurfaceType GetType() const override { return SurfaceType::DATA; }
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virtual IntSize GetSize() const override { return mSize; }
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virtual SurfaceFormat GetFormat() const override { return mFormat; }
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bool Init(const IntSize &aSize,
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SurfaceFormat aFormat,
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bool aZero);
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bool InitWithStride(const IntSize &aSize,
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SurfaceFormat aFormat,
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int32_t aStride,
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bool aZero);
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virtual bool Map(MapType, MappedSurface *aMappedSurface) override
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{
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aMappedSurface->mData = GetData();
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aMappedSurface->mStride = Stride();
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bool success = !!aMappedSurface->mData;
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if (success) {
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mMapCount++;
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}
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return success;
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}
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virtual void Unmap() override
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{
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mMapCount--;
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MOZ_ASSERT(mMapCount >= 0);
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}
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private:
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AlignedArray<uint8_t> mArray;
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int32_t mStride;
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SurfaceFormat mFormat;
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IntSize mSize;
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Atomic<int32_t> mMapCount;
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};
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} // namespace gfx
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} // namespace mozilla
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#endif /* MOZILLA_GFX_SOURCESURFACERAWDATA_H_ */
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