widget/src/shared/nsShmImage.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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   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/
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  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
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  14  * License.
  15  *
  16  * The Original Code is the Mozilla browser.
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  18  * The Initial Developer of the Original Code is
  19  * Netscape Communications Corporation.
  20  * Portions created by the Initial Developer are Copyright (C) 1999
  21  * the Initial Developer. All Rights Reserved.
  22  *
  23  * Contributor(s):
  24  *   Chris Jones <jones.chris.g@gmail.com>
  25  *   Oleg Romashin <romaxa@gmail.com>
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  27  * Alternatively, the contents of this file may be used under the terms of
  28  * either the GNU General Public License Version 2 or later (the "GPL"), or
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  39  * ***** END LICENSE BLOCK ***** */
  40
  41 #ifndef __mozilla_widget_nsShmImage_h__
  42 #define __mozilla_widget_nsShmImage_h__
  43
  44 #ifdef MOZ_IPC
  45 #  include "mozilla/ipc/SharedMemorySysV.h"
  46 #endif
  47
  48 #if defined(MOZ_X11) && defined(MOZ_HAVE_SHAREDMEMORYSYSV)
  49 #  define MOZ_HAVE_SHMIMAGE
  50 #endif
  51
  52 #ifdef MOZ_HAVE_SHMIMAGE
  53
  54 #include "nsIWidget.h"
  55 #include "gfxASurface.h"
  56
  57 #include <X11/Xlib.h>
  58 #include <X11/Xutil.h>
  59 #include <X11/extensions/XShm.h>
  60
  61 #if defined(MOZ_WIDGET_GTK2)
  62 #define DISPLAY gdk_x11_get_default_xdisplay
  63 #elif defined(MOZ_WIDGET_QT)
  64 #include "QX11Info"
  65 #define DISPLAY QX11Info().display
  66 #endif
  67
  68 class QRect;
  69 class QWidget;
  70
  71 class nsShmImage {
  72     NS_INLINE_DECL_REFCOUNTING(nsShmImage)
  73
  74     typedef mozilla::ipc::SharedMemorySysV SharedMemorySysV;
  75
  76 public:
  77     typedef gfxASurface::gfxImageFormat Format;
  78
  79     static PRBool UseShm();
  80     static already_AddRefed<nsShmImage>
  81         Create(const gfxIntSize& aSize, Visual* aVisual, unsigned int aDepth);
  82     static already_AddRefed<gfxASurface>
  83         EnsureShmImage(const gfxIntSize& aSize, Visual* aVisual, unsigned int aDepth,
  84                        nsRefPtr<nsShmImage>& aImage);
  85
  86     ~nsShmImage() {
  87         if (mImage) {
  88             XSync(DISPLAY(), False);
  89             if (mXAttached) {
  90                 XShmDetach(DISPLAY(), &mInfo);
  91             }
  92             XDestroyImage(mImage);
  93         }
  94     }
  95
  96     already_AddRefed<gfxASurface> AsSurface();
  97
  98 #if defined(MOZ_WIDGET_GTK2)
  99     void Put(GdkWindow* aWindow, GdkRectangle* aRects, GdkRectangle* aEnd);
 100 #elif defined(MOZ_WIDGET_QT)
 101     void Put(QWidget* aWindow, QRect& aRect);
 102 #endif
 103
 104     gfxIntSize Size() const { return mSize; }
 105
 106 private:
 107     nsShmImage()
 108         : mImage(nsnull)
 109         , mXAttached(PR_FALSE)
 110     { mInfo.shmid = SharedMemorySysV::NULLHandle(); }
 111
 112     nsRefPtr<SharedMemorySysV>   mSegment;
 113     XImage*                      mImage;
 114     XShmSegmentInfo              mInfo;
 115     gfxIntSize                   mSize;
 116     Format                       mFormat;
 117     PRPackedBool                 mXAttached;
 118 };
 119
 120 #endif // MOZ_HAVE_SHMIMAGE
 121
 122 #endif