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/* -*- 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()
: mRawData(0)
, mStride(0)
, mFormat(SurfaceFormat::UNKNOWN)
, mMapCount(0)
, mOwnData(false)
, mDeallocator(nullptr)
, mClosure(nullptr)
{
}
virtual ~SourceSurfaceRawData()
{
if (mDeallocator) {
mDeallocator(mClosure);
} else if (mOwnData) {
// The buffer is created from GuaranteePersistance().
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; }
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:
friend class Factory;
// If we have a custom deallocator, the |aData| will be released using the
// custom deallocator and |aClosure| in dtor. The assumption is that the
// caller will check for valid size and stride before making this call.
void InitWrappingData(unsigned char *aData,
const IntSize &aSize,
int32_t aStride,
SurfaceFormat aFormat,
Factory::SourceSurfaceDeallocator aDeallocator,
void* aClosure);
uint8_t *mRawData;
int32_t mStride;
SurfaceFormat mFormat;
IntSize mSize;
Atomic<int32_t> mMapCount;
bool mOwnData;
Factory::SourceSurfaceDeallocator mDeallocator;
void* mClosure;
};
class SourceSurfaceAlignedRawData : public DataSourceSurface
{
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceAlignedRawData, override)
SourceSurfaceAlignedRawData()
: mStride(0)
, mFormat(SurfaceFormat::UNKNOWN)
, 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; }
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:
friend class Factory;
bool Init(const IntSize &aSize,
SurfaceFormat aFormat,
bool aClearMem,
uint8_t aClearValue,
int32_t aStride = 0);
AlignedArray<uint8_t> mArray;
int32_t mStride;
SurfaceFormat mFormat;
IntSize mSize;
Atomic<int32_t> mMapCount;
};
} // namespace gfx
} // namespace mozilla
#endif /* MOZILLA_GFX_SOURCESURFACERAWDATA_H_ */
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