gfx/2d/SourceSurfaceCapture.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_gfx_2d_SourceSurfaceCapture_h
   8 #define mozilla_gfx_2d_SourceSurfaceCapture_h
   9
  10 #include "2D.h"
  11 #include "CaptureCommandList.h"
  12 #include "mozilla/Mutex.h"
  13
  14 namespace mozilla {
  15 namespace gfx {
  16
  17 class DrawTargetCaptureImpl;
  18
  19 class SourceSurfaceCapture : public SourceSurface
  20 {
  21   friend class DrawTargetCaptureImpl;
  22 public:
  23   MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(SourceSurfaceCapture, override)
  24
  25   explicit SourceSurfaceCapture(DrawTargetCaptureImpl* aOwner);
  26   explicit SourceSurfaceCapture(DrawTargetCaptureImpl* aOwner,
  27                                 LuminanceType aLuminanceType,
  28                                 float aOpacity);
  29   ~SourceSurfaceCapture();
  30
  31   SurfaceType GetType() const override { return SurfaceType::CAPTURE; }
  32   IntSize GetSize() const override { return mSize; }
  33   SurfaceFormat GetFormat() const override { return mFormat; }
  34
  35   bool IsValid() const override;
  36   already_AddRefed<DataSourceSurface> GetDataSurface() override;
  37
  38   // The backend hint is not guaranteed to be honored, so callers must check
  39   // the resulting type if needed.
  40   RefPtr<SourceSurface> Resolve(BackendType aBackendType = BackendType::NONE);
  41
  42 protected:
  43   RefPtr<SourceSurface> ResolveImpl(BackendType aBackendType);
  44   void DrawTargetWillDestroy();
  45   void DrawTargetWillChange();
  46
  47 private:
  48   IntSize mSize;
  49   SurfaceFormat mFormat;
  50   int32_t mStride;
  51   int32_t mSurfaceAllocationSize;
  52   RefPtr<DrawTarget> mRefDT;
  53   DrawTargetCaptureImpl* mOwner;
  54   CaptureCommandList mCommands;
  55   bool mHasCommandList;
  56
  57   bool mShouldResolveToLuminance;
  58   LuminanceType mLuminanceType;
  59   float mOpacity;
  60
  61   // Note that we have to keep a reference around. Internal methods like
  62   // GetSkImageForSurface expect their callers to hold a reference, which
  63   // isn't easily possible for nested surfaces.
  64   mutable Mutex mLock;
  65   RefPtr<SourceSurface> mResolved;
  66 };
  67
  68 } // namespace gfx
  69 } // namespace mozilla
  70
  71 #endif // mozilla_gfx_2d_SourceSurfaceCapture_h