The Tor Browser: widget/shared/nsShmImage.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  *

     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/. */

     7 #ifndef __mozilla_widget_nsShmImage_h__

     8 #define __mozilla_widget_nsShmImage_h__

    10 #include "mozilla/ipc/SharedMemorySysV.h"

    12 #if defined(MOZ_X11) && defined(MOZ_HAVE_SHAREDMEMORYSYSV)

    13 #  define MOZ_HAVE_SHMIMAGE

    14 #endif

    16 #ifdef MOZ_HAVE_SHMIMAGE

    18 #include "nsIWidget.h"

    19 #include "gfxTypes.h"

    20 #include "nsAutoPtr.h"

    22 #include "mozilla/X11Util.h"

    23 #include <X11/Xlib.h>

    24 #include <X11/Xutil.h>

    25 #include <X11/extensions/XShm.h>

    27 #if defined(MOZ_WIDGET_GTK)

    28 #define DISPLAY gdk_x11_get_default_xdisplay

    29 #elif defined(MOZ_WIDGET_QT)

    30 #define DISPLAY mozilla::DefaultXDisplay

    31 #endif

    33 class QRect;

    34 class QWindow;

    35 class gfxASurface;

    37 class nsShmImage {

    38     NS_INLINE_DECL_REFCOUNTING(nsShmImage)

    40     typedef mozilla::ipc::SharedMemorySysV SharedMemorySysV;

    42 public:

    43     typedef gfxImageFormat Format;

    45     static bool UseShm();

    46     static already_AddRefed<nsShmImage>

    47         Create(const gfxIntSize& aSize, Visual* aVisual, unsigned int aDepth);

    48     static already_AddRefed<gfxASurface>

    49         EnsureShmImage(const gfxIntSize& aSize, Visual* aVisual, unsigned int aDepth,

    50                        nsRefPtr<nsShmImage>& aImage);

    52     ~nsShmImage() {

    53         if (mImage) {

    54             mozilla::FinishX(DISPLAY());

    55             if (mXAttached) {

    56                 XShmDetach(DISPLAY(), &mInfo);

    57             }

    58             XDestroyImage(mImage);

    59         }

    60     }

    62     already_AddRefed<gfxASurface> AsSurface();

    64 #if (MOZ_WIDGET_GTK == 2)

    65     void Put(GdkWindow* aWindow, GdkRectangle* aRects, GdkRectangle* aEnd);

    66 #elif (MOZ_WIDGET_GTK == 3)

    67     void Put(GdkWindow* aWindow, cairo_rectangle_list_t* aRects);

    68 #elif defined(MOZ_WIDGET_QT)

    69     void Put(QWindow* aWindow, QRect& aRect);

    70 #endif

    72     gfxIntSize Size() const { return mSize; }

    74 private:

    75     nsShmImage()

    76         : mImage(nullptr)

    77         , mXAttached(false)

    78     { mInfo.shmid = SharedMemorySysV::NULLHandle(); }

    80     nsRefPtr<SharedMemorySysV>   mSegment;

    81     XImage*                      mImage;

    82     XShmSegmentInfo              mInfo;

    83     gfxIntSize                   mSize;

    84     Format                       mFormat;

    85     bool                         mXAttached;

    86 };

    88 #endif // MOZ_HAVE_SHMIMAGE

    90 #endif

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