LCOV - code coverage report
Current view: directory - objdir/dist/include - gfxSharedImageSurface.h (source / functions) Found Hit Coverage
Test: app.info Lines: 17 0 0.0 %
Date: 2012-06-02 Functions: 5 0 0.0 %

       1                 : // vim:set ts=4 sts=4 sw=4 et cin:
       2                 : /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       3                 :  * ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is Nokia Corporation code.
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is Nokia Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2005
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Oleg Romashin <romaxa@gmail.com>
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      27                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : 
      39                 : #ifndef GFX_SHARED_IMAGESURFACE_H
      40                 : #define GFX_SHARED_IMAGESURFACE_H
      41                 : 
      42                 : #include "mozilla/ipc/Shmem.h"
      43                 : #include "mozilla/ipc/SharedMemory.h"
      44                 : 
      45                 : #include "gfxASurface.h"
      46                 : #include "gfxImageSurface.h"
      47                 : 
      48                 : class THEBES_API gfxSharedImageSurface : public gfxImageSurface {
      49                 :     typedef mozilla::ipc::SharedMemory SharedMemory;
      50                 :     typedef mozilla::ipc::Shmem Shmem;
      51                 : 
      52                 : public:
      53                 :     virtual ~gfxSharedImageSurface();
      54                 : 
      55                 :     /**
      56                 :      * Return a new gfxSharedImageSurface around a shmem segment newly
      57                 :      * allocated by this function.  |aAllocator| is the object used to
      58                 :      * allocate the new shmem segment.  Null is returned if creating
      59                 :      * the surface failed.
      60                 :      *
      61                 :      * NB: the *caller* is responsible for freeing the Shmem allocated
      62                 :      * by this function.
      63                 :      */
      64                 :     template<class ShmemAllocator>
      65                 :     static already_AddRefed<gfxSharedImageSurface>
      66                 :     Create(ShmemAllocator* aAllocator,
      67                 :            const gfxIntSize& aSize,
      68                 :            gfxImageFormat aFormat,
      69                 :            SharedMemory::SharedMemoryType aShmType = SharedMemory::TYPE_BASIC)
      70                 :     {
      71                 :         return Create<ShmemAllocator, false>(aAllocator, aSize, aFormat, aShmType);
      72                 :     }
      73                 : 
      74                 :     /**
      75                 :      * Return a new gfxSharedImageSurface that wraps a shmem segment
      76                 :      * already created by the Create() above.  Bad things will happen
      77                 :      * if an attempt is made to wrap any other shmem segment.  Null is
      78                 :      * returned if creating the surface failed.
      79                 :      */
      80                 :     static already_AddRefed<gfxSharedImageSurface>
      81                 :     Open(const Shmem& aShmem);
      82                 : 
      83                 :     template<class ShmemAllocator>
      84                 :     static already_AddRefed<gfxSharedImageSurface>
      85               0 :     CreateUnsafe(ShmemAllocator* aAllocator,
      86                 :                  const gfxIntSize& aSize,
      87                 :                  gfxImageFormat aFormat,
      88                 :                  SharedMemory::SharedMemoryType aShmType = SharedMemory::TYPE_BASIC)
      89                 :     {
      90               0 :         return Create<ShmemAllocator, true>(aAllocator, aSize, aFormat, aShmType);
      91                 :     }
      92                 : 
      93               0 :     Shmem& GetShmem() { return mShmem; }
      94                 : 
      95                 :     static bool IsSharedImage(gfxASurface *aSurface);
      96                 : 
      97                 : private:
      98                 :     gfxSharedImageSurface(const gfxIntSize&, gfxImageFormat, const Shmem&);
      99                 : 
     100                 :     void WriteShmemInfo();
     101                 : 
     102                 :     static size_t GetAlignedSize(const gfxIntSize&, long aStride);
     103                 : 
     104                 :     template<class ShmemAllocator, bool Unsafe>
     105                 :     static already_AddRefed<gfxSharedImageSurface>
     106               0 :     Create(ShmemAllocator* aAllocator,
     107                 :            const gfxIntSize& aSize,
     108                 :            gfxImageFormat aFormat,
     109                 :            SharedMemory::SharedMemoryType aShmType)
     110                 :     {
     111               0 :         if (!CheckSurfaceSize(aSize))
     112               0 :             return nsnull;
     113                 : 
     114               0 :         Shmem shmem;
     115               0 :         long stride = ComputeStride(aSize, aFormat);
     116               0 :         size_t size = GetAlignedSize(aSize, stride);
     117                 :         if (!Unsafe) {
     118                 :             if (!aAllocator->AllocShmem(size, aShmType, &shmem))
     119                 :                 return nsnull;
     120                 :         } else {
     121               0 :             if (!aAllocator->AllocUnsafeShmem(size, aShmType, &shmem))
     122               0 :                 return nsnull;
     123                 :         }
     124                 : 
     125                 :         nsRefPtr<gfxSharedImageSurface> s =
     126               0 :             new gfxSharedImageSurface(aSize, aFormat, shmem);
     127               0 :         if (s->CairoStatus() != 0) {
     128               0 :             aAllocator->DeallocShmem(shmem);
     129               0 :             return nsnull;
     130                 :         }
     131               0 :         s->WriteShmemInfo();
     132               0 :         return s.forget();
     133                 :     }
     134                 : 
     135                 :     Shmem mShmem;
     136                 : 
     137                 :     // Calling these is very bad, disallow it
     138                 :     gfxSharedImageSurface(const gfxSharedImageSurface&);
     139                 :     gfxSharedImageSurface& operator=(const gfxSharedImageSurface&);
     140                 : };
     141                 : 
     142                 : #endif /* GFX_SHARED_IMAGESURFACE_H */

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