The Tor Browser: gfx/ipc/SharedDIBSurface.h@925c144e1f1f

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef mozilla_gfx_SharedDIBSurface_h

     7 #define mozilla_gfx_SharedDIBSurface_h

     9 #include "gfxImageSurface.h"

    10 #include "SharedDIBWin.h"

    12 #include <windows.h>

    14 namespace mozilla {

    15 namespace gfx {

    17 /**

    18  * A SharedDIBSurface owns an underlying SharedDIBWin.

    19  */

    20 class SharedDIBSurface : public gfxImageSurface

    21 {

    22 public:

    23   typedef base::SharedMemoryHandle Handle;

    25   SharedDIBSurface() { }

    26   ~SharedDIBSurface() { }

    28   /**

    29    * Create this image surface backed by shared memory.

    30    */

    31   bool Create(HDC adc, uint32_t aWidth, uint32_t aHeight, bool aTransparent);

    33   /**

    34    * Attach this surface to shared memory from another process.

    35    */

    36   bool Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight,

    37               bool aTransparent);

    39   /**

    40    * After drawing to a surface via GDI, GDI must be flushed before the bitmap

    41    * is valid.

    42    */

    43   void Flush() { ::GdiFlush(); }

    45   HDC GetHDC() { return mSharedDIB.GetHDC(); }

    47   nsresult ShareToProcess(base::ProcessHandle aChildProcess, Handle* aChildHandle) {

    48     return mSharedDIB.ShareToProcess(aChildProcess, aChildHandle);

    49   }

    51   static bool IsSharedDIBSurface(gfxASurface* aSurface);

    53 private:

    54   SharedDIBWin mSharedDIB;

    56   void InitSurface(uint32_t aWidth, uint32_t aHeight, bool aTransparent);

    57 };

    59 } // namespace gfx

    60 } // namespace mozilla

    62 #endif // mozilla_gfx_SharedDIBSurface_h

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