DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (409f3966645a)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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);
  }

  bool Init(const IntSize &aSize,
            SurfaceFormat aFormat,
            bool aClearMem,
            uint8_t aClearValue,
            int32_t aStride = 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; }

  void AddSizeOfExcludingThis(MallocSizeOf aMallocSizeOf,
                              size_t& aHeapSizeOut,
                              size_t& aNonHeapSizeOut,
                              size_t& aExtHandlesOut) const override;

  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;

  AlignedArray<uint8_t> mArray;
  int32_t mStride;
  SurfaceFormat mFormat;
  IntSize mSize;
  Atomic<int32_t> mMapCount;
};

} // namespace gfx
} // namespace mozilla

#endif /* MOZILLA_GFX_SOURCESURFACERAWDATA_H_ */