glamor/glamor_sync.c

   1 /*
   2  * Copyright © 2014 Keith Packard
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that copyright
   7  * notice and this permission notice appear in supporting documentation, and
   8  * that the name of the copyright holders not be used in advertising or
   9  * publicity pertaining to distribution of the software without specific,
  10  * written prior permission.  The copyright holders make no representations
  11  * about the suitability of this software for any purpose.  It is provided "as
  12  * is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  20  * OF THIS SOFTWARE.
  21  */
  22
  23
  24 #include "glamor_priv.h"
  25 #include "misyncshm.h"
  26 #include "misyncstr.h"
  27
  28 #if XSYNC
  29 /*
  30  * This whole file exists to wrap a sync fence trigger operation so
  31  * that we can flush GL to provide serialization between the server
  32  * and the shm fence client
  33  */
  34
  35 static DevPrivateKeyRec glamor_sync_fence_key;
  36
  37 struct glamor_sync_fence {
  38         SyncFenceSetTriggeredFunc set_triggered;
  39 };
  40
  41 static inline struct glamor_sync_fence *
  42 glamor_get_sync_fence(SyncFence *fence)
  43 {
  44     return (struct glamor_sync_fence *) dixLookupPrivate(&fence->devPrivates, &glamor_sync_fence_key);
  45 }
  46
  47 static void
  48 glamor_sync_fence_set_triggered (SyncFence *fence)
  49 {
  50         ScreenPtr screen = fence->pScreen;
  51         glamor_screen_private *glamor = glamor_get_screen_private(screen);
  52         struct glamor_sync_fence *glamor_fence = glamor_get_sync_fence(fence);
  53
  54         /* Flush pending rendering operations */
  55         glamor_flush(glamor);
  56
  57         fence->funcs.SetTriggered = glamor_fence->set_triggered;
  58         fence->funcs.SetTriggered(fence);
  59         glamor_fence->set_triggered = fence->funcs.SetTriggered;
  60         fence->funcs.SetTriggered = glamor_sync_fence_set_triggered;
  61 }
  62
  63 static void
  64 glamor_sync_create_fence(ScreenPtr screen,
  65                         SyncFence *fence,
  66                         Bool initially_triggered)
  67 {
  68         glamor_screen_private *glamor = glamor_get_screen_private(screen);
  69         SyncScreenFuncsPtr screen_funcs = miSyncGetScreenFuncs(screen);
  70         struct glamor_sync_fence *glamor_fence = glamor_get_sync_fence(fence);
  71
  72         screen_funcs->CreateFence = glamor->saved_procs.sync_screen_funcs.CreateFence;
  73         screen_funcs->CreateFence(screen, fence, initially_triggered);
  74         glamor->saved_procs.sync_screen_funcs.CreateFence = screen_funcs->CreateFence;
  75         screen_funcs->CreateFence = glamor_sync_create_fence;
  76
  77         glamor_fence->set_triggered = fence->funcs.SetTriggered;
  78         fence->funcs.SetTriggered = glamor_sync_fence_set_triggered;
  79 }
  80 #endif
  81
  82 Bool
  83 glamor_sync_init(ScreenPtr screen)
  84 {
  85 #if XSYNC
  86         glamor_screen_private   *glamor = glamor_get_screen_private(screen);
  87         SyncScreenFuncsPtr      screen_funcs;
  88
  89         if (!dixPrivateKeyRegistered(&glamor_sync_fence_key)) {
  90                 if (!dixRegisterPrivateKey(&glamor_sync_fence_key,
  91                                            PRIVATE_SYNC_FENCE,
  92                                            sizeof (struct glamor_sync_fence)))
  93                         return FALSE;
  94         }
  95
  96 #ifdef HAVE_XSHMFENCE
  97         if (!miSyncShmScreenInit(screen))
  98                 return FALSE;
  99 #else
 100         if (!miSyncSetup(screen))
 101                 return FALSE;
 102 #endif
 103
 104         screen_funcs = miSyncGetScreenFuncs(screen);
 105         glamor->saved_procs.sync_screen_funcs.CreateFence = screen_funcs->CreateFence;
 106         screen_funcs->CreateFence = glamor_sync_create_fence;
 107 #endif
 108         return TRUE;
 109 }
 110
 111 void
 112 glamor_sync_close(ScreenPtr screen)
 113 {
 114 #if XSYNC
 115         glamor_screen_private   *glamor = glamor_get_screen_private(screen);
 116         SyncScreenFuncsPtr      screen_funcs = miSyncGetScreenFuncs(screen);
 117
 118         if (screen_funcs)
 119                 screen_funcs->CreateFence = glamor->saved_procs.sync_screen_funcs.CreateFence;
 120 #endif
 121 }