components/x11/libdga/src/pix_update.c

   1 /* Copyright (c) 1993, 2002, Oracle and/or its affiliates. All rights reserved.
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a
   4  * copy of this software and associated documentation files (the "Software"),
   5  * to deal in the Software without restriction, including without limitation
   6  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   7  * and/or sell copies of the Software, and to permit persons to whom the
   8  * Software is furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice (including the next
  11  * paragraph) shall be included in all copies or substantial portions of the
  12  * Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20  * DEALINGS IN THE SOFTWARE.
  21  */
  22
  23
  24 /*
  25 ** pix_update.c
  26 **
  27 ** Routines of the update phase for pixmaps.
  28 */
  29
  30 #ifdef SERVER_DGA
  31 #include <X11/Xlib.h>
  32 #endif /* SERVER_DGA */
  33 #include "dga_incls.h"
  34 #include "pix_grab.h"
  35
  36 void
  37 dgai_pix_notify(_Dga_pixmap dgapix)
  38 {
  39     if (dgapix->siteNotifyFunc && (dgapix->changeMask & DGA_CHANGE_SITE)) {
  40         (*dgapix->siteNotifyFunc)((Dga_drawable)dgapix, -1,
  41                                   dgapix->siteNotifyClientData,
  42                                   dgapix->siteChgReason);
  43         dgapix->changeMask &= ~DGA_CHANGE_SITE;
  44     }
  45 }
  46
  47 int
  48 dgai_pix_update(Dga_drawable dgadraw, short bufIndex)
  49 {
  50     _Dga_pixmap dgapix = (_Dga_pixmap)dgadraw;
  51     SHARED_PIXMAP_INFO *infop;
  52
  53 #ifdef MT
  54     if (dgaMTOn) {
  55         mutex_lock(dgapix->mutexp);
  56         DGA_LOCK(dgadraw);
  57         /* check the real change count that we saved away */
  58         if (dgapix->shadow_chngcnt[0] == *dgapix->s_chngcnt_p) {
  59             mutex_unlock(dgapix->mutexp);
  60             DGA_UNLOCK(dgadraw);
  61             return (0);
  62         }
  63     }
  64 #endif
  65
  66     infop = PIX_INFOP(dgapix);
  67
  68     dgapix->changeMask = 0;
  69
  70     /* first, see if the shared info is still valid */
  71     if (infop->obsolete) {
  72         dgapix->changeMask |= DGA_CHANGE_ZOMBIE;
  73     }
  74     if (dgapix->changeMask & DGA_CHANGE_ZOMBIE) {
  75         dgapix->changeMask |= (DGA_CHANGE_SITE | DGA_CHANGE_CLIP);
  76         dgapix->siteChgReason = DGA_SITECHG_ZOMBIE;
  77     }
  78
  79     /* see if the dev_info has changed */
  80     if (dgapix->c_devinfocnt != *dgapix->s_devinfocnt_p) {
  81         dgapix->changeMask |= DGA_CHANGE_DEVINFO;
  82         dgapix->c_devinfocnt = *dgapix->s_devinfocnt_p;
  83     }
  84
  85     /* Has the cache changed? */
  86     if (dgapix->c_cachecnt != *dgapix->s_cachecnt_p) {
  87         dgapix->changeMask |= (DGA_CHANGE_CACHE | DGA_CHANGE_SITE);
  88         dgapix->siteChgReason = DGA_SITECHG_CACHE;
  89         dgapix->c_cached = *dgapix->s_cached_p;
  90         dgapix->c_cachecnt = *dgapix->s_cachecnt_p;
  91     }
  92
  93     dgai_pix_notify(dgapix);
  94
  95 #ifdef MT
  96     if (dgaMTOn) {
  97         /* save the real change count */
  98         dgapix->shadow_chngcnt[0] = *dgapix->s_chngcnt_p;
  99         /* For the MT case, make sure that this update function gets called
 100          * the next time around, so make the change count different.
 101          */
 102         dgapix->c_chngcnt[0] = *dgapix->s_chngcnt_p - 1;
 103         mutex_unlock(dgapix->mutexp);
 104         DGA_UNLOCK(dgadraw);
 105     } else {
 106         dgapix->c_chngcnt[0] = *dgapix->s_chngcnt_p;
 107     }
 108 #else
 109     dgapix->c_chngcnt[0] = *dgapix->s_chngcnt_p;
 110 #endif
 111     return(dgapix->changeMask);
 112
 113 }