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      1 /* Copyright (C) 2010 The Android Open Source Project
      2 **
      3 ** This software is licensed under the terms of the GNU General Public
      4 ** License version 2, as published by the Free Software Foundation, and
      5 ** may be copied, distributed, and modified under those terms.
      6 **
      7 ** This program is distributed in the hope that it will be useful,
      8 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
      9 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     10 ** GNU General Public License for more details.
     11 */
     12 
     13 /*
     14  * Contains extension to android display (see android/display.h|c) that is used
     15  * by the core to communicate display changes to the attached UI
     16  */
     17 
     18 #include "android/display-core.h"
     19 #include "qemu-common.h"
     20 
     21 /* This callback is call periodically by the GUI timer.
     22  * Its purpose is to ensure that hw framebuffer updates are properly
     23  * detected. Call the normal QEMU function for this here.
     24  */
     25 static void
     26 coredisplay_refresh(DisplayState* ds)
     27 {
     28     (void)ds;
     29     vga_hw_update();
     30 }
     31 
     32 /* Don't do anything here because this callback can't differentiate
     33  * between several listeners. This will be handled by a DisplayUpdateListener
     34  * instead. See Android-specific changes in console.h
     35  *
     36  * In the core, the DisplayUpdateListener is registered by the ProxyFramebuffer
     37  * object. See android/protocol/fb-updates-proxy.c.
     38  */
     39 static void
     40 coredisplay_update(DisplayState* ds, int x, int y, int w, int h)
     41 {
     42     (void)ds;
     43     (void)x;
     44     (void)y;
     45     (void)w;
     46     (void)h;
     47 }
     48 
     49 /* This callback is normally used to indicate that the display resolution
     50  * was changed by the guest (e.g. when a Windows PC changes the display from
     51  * 1024x768 to 800x600. Since this doesn't happen in Android, ignore it.
     52  */
     53 static void
     54 coredisplay_resize(DisplayState* ds)
     55 {
     56     (void)ds;
     57 }
     58 
     59 void
     60 coredisplay_init(DisplayState* ds)
     61 {
     62     static DisplayChangeListener dcl[1];
     63 
     64     dcl->dpy_update  = coredisplay_update;
     65     dcl->dpy_refresh = coredisplay_refresh;
     66     dcl->dpy_resize  = coredisplay_resize;
     67     register_displaychangelistener(ds, dcl);
     68 }
     69