cogl/frame-info: Add sequence

It will be used for the presentation-time Wayland protocol.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1484>

cogl/cogl/cogl-frame-info-private.h

@@ -53,6 +53,8 @@ struct _CoglFrameInfo
   int64_t global_frame_counter;
 
   CoglFrameInfoFlag flags;
+
+  unsigned int sequence;
 };
 
 COGL_EXPORT

cogl/cogl/cogl-frame-info.c

@@ -94,3 +94,11 @@ cogl_frame_info_is_hw_clock (CoglFrameInfo *info)
 {
   return !!(info->flags & COGL_FRAME_INFO_FLAG_HW_CLOCK);
 }
+
+unsigned int
+cogl_frame_info_get_sequence (CoglFrameInfo *info)
+{
+  g_warn_if_fail (!(info->flags & COGL_FRAME_INFO_FLAG_SYMBOLIC));
+
+  return info->sequence;
+}

cogl/cogl/cogl-frame-info.h

@@ -141,6 +141,9 @@ gboolean cogl_frame_info_get_is_symbolic (CoglFrameInfo *info);
 COGL_EXPORT
 gboolean cogl_frame_info_is_hw_clock (CoglFrameInfo *info);
 
+COGL_EXPORT
+unsigned int cogl_frame_info_get_sequence (CoglFrameInfo *info);
+
 G_END_DECLS
 
 #endif /* __COGL_FRAME_INFO_H */

cogl/cogl/winsys/cogl-onscreen-glx.c

@@ -497,6 +497,9 @@ _cogl_winsys_wait_for_vblank (CoglOnscreen *onscreen)
             {
               info->presentation_time_us = g_get_monotonic_time ();
             }
+
+          /* Intentionally truncating to lower 32 bits, same as DRM. */
+          info->sequence = msc;
         }
       else
         {
@@ -976,20 +979,20 @@ cogl_onscreen_glx_notify_swap_buffers (CoglOnscreen          *onscreen,
   CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
   CoglContext *context = cogl_framebuffer_get_context (framebuffer);
   gboolean ust_is_monotonic;
+  CoglFrameInfo *info;
 
   /* We only want to notify that the swap is complete when the
      application calls cogl_context_dispatch so instead of immediately
      notifying we'll set a flag to remember to notify later */
   set_sync_pending (onscreen);
 
+  info = cogl_onscreen_peek_head_frame_info (onscreen);
+
   ust_is_monotonic = is_ust_monotonic (context->display->renderer,
                                        onscreen_glx->glxwin);
 
   if (swap_event->ust != 0 && ust_is_monotonic)
     {
-      CoglFrameInfo *info;
-
-      info = cogl_onscreen_peek_head_frame_info (onscreen);
       info->presentation_time_us =
         ust_to_microseconds (context->display->renderer,
                              onscreen_glx->glxwin,
@@ -997,6 +1000,9 @@ cogl_onscreen_glx_notify_swap_buffers (CoglOnscreen          *onscreen,
       info->flags |= COGL_FRAME_INFO_FLAG_HW_CLOCK;
     }
 
+  /* Intentionally truncating to lower 32 bits, same as DRM. */
+  info->sequence = swap_event->msc;
+
   set_complete_pending (onscreen);
 }
 

src/backends/native/meta-onscreen-native.c

@@ -170,7 +170,8 @@ static void
 maybe_update_frame_info (MetaCrtc         *crtc,
                          CoglFrameInfo    *frame_info,
                          int64_t           time_us,
-                         CoglFrameInfoFlag flags)
+                         CoglFrameInfoFlag flags,
+                         unsigned int      sequence)
 {
   const MetaCrtcConfig *crtc_config;
   const MetaCrtcModeInfo *crtc_mode_info;
@@ -189,6 +190,7 @@ maybe_update_frame_info (MetaCrtc         *crtc,
       frame_info->presentation_time_us = time_us;
       frame_info->refresh_rate = refresh_rate;
       frame_info->flags |= flags;
+      frame_info->sequence = sequence;
     }
 }
 
@@ -210,7 +212,8 @@ static void
 notify_view_crtc_presented (MetaRendererView *view,
                             MetaKmsCrtc      *kms_crtc,
                             int64_t           time_us,
-                            CoglFrameInfoFlag flags)
+                            CoglFrameInfoFlag flags,
+                            unsigned int      sequence)
 {
   ClutterStageView *stage_view = CLUTTER_STAGE_VIEW (view);
   CoglFramebuffer *framebuffer =
@@ -225,7 +228,7 @@ notify_view_crtc_presented (MetaRendererView *view,
   frame_info = cogl_onscreen_peek_head_frame_info (onscreen);
 
   crtc = META_CRTC (meta_crtc_kms_from_kms_crtc (kms_crtc));
-  maybe_update_frame_info (crtc, frame_info, time_us, flags);
+  maybe_update_frame_info (crtc, frame_info, time_us, flags, sequence);
 
   meta_onscreen_native_notify_frame_complete (onscreen);
 
@@ -287,7 +290,8 @@ page_flip_feedback_flipped (MetaKmsCrtc  *kms_crtc,
 
   notify_view_crtc_presented (view, kms_crtc,
                               presentation_time_us,
-                              flags);
+                              flags,
+                              sequence);
 }
 
 static void
@@ -323,7 +327,8 @@ page_flip_feedback_mode_set_fallback (MetaKmsCrtc *kms_crtc,
   notify_view_crtc_presented (view,
                               kms_crtc,
                               now_us,
-                              COGL_FRAME_INFO_FLAG_NONE);
+                              COGL_FRAME_INFO_FLAG_NONE,
+                              0);
 }
 
 static void
@@ -350,7 +355,8 @@ page_flip_feedback_discarded (MetaKmsCrtc  *kms_crtc,
   notify_view_crtc_presented (view,
                               kms_crtc,
                               now_us,
-                              COGL_FRAME_INFO_FLAG_NONE);
+                              COGL_FRAME_INFO_FLAG_NONE,
+                              0);
 }
 
 static const MetaKmsPageFlipListenerVtable page_flip_listener_vtable = {