LCOV - code coverage report
Current view: directory - gfx/thebes - gfxSharedImageSurface.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 36 0 0.0 %
Date: 2012-06-02 Functions: 8 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                 : #include "base/basictypes.h"
      40                 : #include "gfxSharedImageSurface.h"
      41                 : #include "cairo.h"
      42                 : 
      43                 : #define MOZ_ALIGN_WORD(x) (((x) + 3) & ~3)
      44                 : 
      45                 : using namespace mozilla::ipc;
      46                 : 
      47                 : static const cairo_user_data_key_t SHM_KEY = {0};
      48                 : 
      49                 : struct SharedImageInfo {
      50                 :     PRInt32 width;
      51                 :     PRInt32 height;
      52                 :     PRInt32 format;
      53                 : };
      54                 : 
      55                 : static SharedImageInfo*
      56               0 : GetShmInfoPtr(const Shmem& aShmem)
      57                 : {
      58                 :     return reinterpret_cast<SharedImageInfo*>
      59               0 :         (aShmem.get<char>() + aShmem.Size<char>() - sizeof(SharedImageInfo));
      60                 : }
      61                 : 
      62               0 : gfxSharedImageSurface::~gfxSharedImageSurface()
      63                 : {
      64               0 :     MOZ_COUNT_DTOR(gfxSharedImageSurface);
      65               0 : }
      66                 : 
      67                 : /*static*/ bool
      68               0 : gfxSharedImageSurface::IsSharedImage(gfxASurface* aSurface)
      69                 : {
      70                 :     return (aSurface
      71               0 :             && aSurface->GetType() == gfxASurface::SurfaceTypeImage
      72               0 :             && aSurface->GetData(&SHM_KEY));
      73                 : }
      74                 : 
      75               0 : gfxSharedImageSurface::gfxSharedImageSurface(const gfxIntSize& aSize,
      76                 :                                              gfxImageFormat aFormat,
      77               0 :                                              const Shmem& aShmem)
      78                 : {
      79               0 :     MOZ_COUNT_CTOR(gfxSharedImageSurface);
      80                 : 
      81               0 :     mSize = aSize;
      82               0 :     mFormat = aFormat;
      83               0 :     mStride = ComputeStride(aSize, aFormat);
      84               0 :     mShmem = aShmem;
      85               0 :     mData = aShmem.get<unsigned char>();
      86                 :     cairo_surface_t *surface =
      87                 :         cairo_image_surface_create_for_data(mData,
      88                 :                                             (cairo_format_t)mFormat,
      89                 :                                             mSize.width,
      90                 :                                             mSize.height,
      91               0 :                                             mStride);
      92               0 :     if (surface) {
      93               0 :         cairo_surface_set_user_data(surface, &SHM_KEY, this, NULL);
      94                 :     }
      95               0 :     Init(surface);
      96               0 : }
      97                 : 
      98                 : void
      99               0 : gfxSharedImageSurface::WriteShmemInfo()
     100                 : {
     101               0 :     SharedImageInfo* shmInfo = GetShmInfoPtr(mShmem);
     102               0 :     shmInfo->width = mSize.width;
     103               0 :     shmInfo->height = mSize.height;
     104               0 :     shmInfo->format = mFormat;
     105               0 : }
     106                 : 
     107                 : /*static*/ size_t
     108               0 : gfxSharedImageSurface::GetAlignedSize(const gfxIntSize& aSize, long aStride)
     109                 : {
     110               0 :    return MOZ_ALIGN_WORD(sizeof(SharedImageInfo) + aSize.height * aStride);
     111                 : }
     112                 : 
     113                 : /*static*/ already_AddRefed<gfxSharedImageSurface>
     114               0 : gfxSharedImageSurface::Open(const Shmem& aShmem)
     115                 : {
     116               0 :     SharedImageInfo* shmInfo = GetShmInfoPtr(aShmem);
     117               0 :     gfxIntSize size(shmInfo->width, shmInfo->height);
     118               0 :     if (!CheckSurfaceSize(size))
     119               0 :         return nsnull;
     120                 : 
     121                 :     nsRefPtr<gfxSharedImageSurface> s =
     122                 :         new gfxSharedImageSurface(size,
     123                 :                                   (gfxImageFormat)shmInfo->format,
     124               0 :                                   aShmem);
     125                 :     // We didn't create this Shmem and so don't free it on errors
     126               0 :     return (s->CairoStatus() != 0) ? nsnull : s.forget();
     127                 : }

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