gecko-dev/gfx/2d/SourceSurfaceRawData.h

135 lines
3.7 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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/. */
#ifndef MOZILLA_GFX_SOURCESURFACERAWDATA_H_
#define MOZILLA_GFX_SOURCESURFACERAWDATA_H_
#include "2D.h"
#include "Tools.h"
#include "mozilla/Atomics.h"
namespace mozilla {
namespace gfx {
class SourceSurfaceRawData : public DataSourceSurface
{
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceRawData, override)
SourceSurfaceRawData()
: mMapCount(0)
{}
~SourceSurfaceRawData()
{
if(mOwnData) delete [] mRawData;
MOZ_ASSERT(mMapCount == 0);
}
virtual uint8_t *GetData() override { return mRawData; }
virtual int32_t Stride() override { return mStride; }
virtual SurfaceType GetType() const override { return SurfaceType::DATA; }
virtual IntSize GetSize() const override { return mSize; }
virtual SurfaceFormat GetFormat() const override { return mFormat; }
void InitWrappingData(unsigned char *aData,
const IntSize &aSize,
int32_t aStride,
SurfaceFormat aFormat,
bool aOwnData);
virtual void GuaranteePersistance() override;
// Althought Map (and Moz2D in general) isn't normally threadsafe,
// we want to allow it for SourceSurfaceRawData since it should
// always be fine (for reading at least).
//
// This is the same as the base class implementation except using
// mMapCount instead of mIsMapped since that breaks for multithread.
//
// Once mfbt supports Monitors we should implement proper read/write
// locking to prevent write races.
virtual bool Map(MapType, MappedSurface *aMappedSurface) override
{
aMappedSurface->mData = GetData();
aMappedSurface->mStride = Stride();
bool success = !!aMappedSurface->mData;
if (success) {
mMapCount++;
}
return success;
}
virtual void Unmap() override
{
mMapCount--;
MOZ_ASSERT(mMapCount >= 0);
}
private:
uint8_t *mRawData;
int32_t mStride;
SurfaceFormat mFormat;
IntSize mSize;
Atomic<int32_t> mMapCount;
bool mOwnData;
};
class SourceSurfaceAlignedRawData : public DataSourceSurface
{
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceAlignedRawData, override)
SourceSurfaceAlignedRawData()
: mMapCount(0)
{}
~SourceSurfaceAlignedRawData()
{
MOZ_ASSERT(mMapCount == 0);
}
virtual uint8_t *GetData() override { return mArray; }
virtual int32_t Stride() override { return mStride; }
virtual SurfaceType GetType() const override { return SurfaceType::DATA; }
virtual IntSize GetSize() const override { return mSize; }
virtual SurfaceFormat GetFormat() const override { return mFormat; }
bool Init(const IntSize &aSize,
SurfaceFormat aFormat,
bool aZero);
bool InitWithStride(const IntSize &aSize,
SurfaceFormat aFormat,
int32_t aStride,
bool aZero);
virtual bool Map(MapType, MappedSurface *aMappedSurface) override
{
aMappedSurface->mData = GetData();
aMappedSurface->mStride = Stride();
bool success = !!aMappedSurface->mData;
if (success) {
mMapCount++;
}
return success;
}
virtual void Unmap() override
{
mMapCount--;
MOZ_ASSERT(mMapCount >= 0);
}
private:
AlignedArray<uint8_t> mArray;
int32_t mStride;
SurfaceFormat mFormat;
IntSize mSize;
Atomic<int32_t> mMapCount;
};
} // namespace gfx
} // namespace mozilla
#endif /* MOZILLA_GFX_SOURCESURFACERAWDATA_H_ */