[mutter] screen-cast/src: Add flag to maybe_record()

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit cea0722e721c7a6faa3a6ea4684d1575174a9837
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri Jul 3 16:48:52 2020 +0200

    screen-cast/src: Add flag to maybe_record()
    
    Will later be used to make recording avoid recording actual pixel
    content if e.g. only the cursor moved.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1361

 src/backends/meta-screen-cast-area-stream-src.c    |  8 ++++++--
 src/backends/meta-screen-cast-monitor-stream-src.c |  8 ++++++--
 src/backends/meta-screen-cast-stream-src.c         |  3 ++-
 src/backends/meta-screen-cast-stream-src.h         |  8 +++++++-
 src/backends/meta-screen-cast-window-stream-src.c  | 12 +++++++++---
 5 files changed, 30 insertions(+), 9 deletions(-)
---
diff --git a/src/backends/meta-screen-cast-area-stream-src.c b/src/backends/meta-screen-cast-area-stream-src.c
index 1a2f369a76..fb365f5c67 100644
--- a/src/backends/meta-screen-cast-area-stream-src.c
+++ b/src/backends/meta-screen-cast-area-stream-src.c
@@ -170,6 +170,7 @@ static void
 sync_cursor_state (MetaScreenCastAreaStreamSrc *area_src)
 {
   MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (area_src);
+  MetaScreenCastRecordFlag flags;
 
   if (!is_cursor_in_stream (area_src))
     return;
@@ -177,7 +178,8 @@ sync_cursor_state (MetaScreenCastAreaStreamSrc *area_src)
   if (is_redraw_queued (area_src))
     return;
 
-  meta_screen_cast_stream_src_maybe_record_frame (src);
+  flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
+  meta_screen_cast_stream_src_maybe_record_frame (src, flags);
 }
 
 static void
@@ -233,10 +235,12 @@ maybe_record_frame_on_idle (gpointer user_data)
   MetaScreenCastAreaStreamSrc *area_src =
     META_SCREEN_CAST_AREA_STREAM_SRC (user_data);
   MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (area_src);
+  MetaScreenCastRecordFlag flags;
 
   area_src->maybe_record_idle_id = 0;
 
-  meta_screen_cast_stream_src_maybe_record_frame (src);
+  flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
+  meta_screen_cast_stream_src_maybe_record_frame (src, flags);
 
   return G_SOURCE_REMOVE;
 }
diff --git a/src/backends/meta-screen-cast-monitor-stream-src.c 
b/src/backends/meta-screen-cast-monitor-stream-src.c
index bcf0afc4bb..955c6ca7a1 100644
--- a/src/backends/meta-screen-cast-monitor-stream-src.c
+++ b/src/backends/meta-screen-cast-monitor-stream-src.c
@@ -121,8 +121,10 @@ stage_painted (MetaStage           *stage,
                gpointer             user_data)
 {
   MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (user_data);
+  MetaScreenCastRecordFlag flags;
 
-  meta_screen_cast_stream_src_maybe_record_frame (src);
+  flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
+  meta_screen_cast_stream_src_maybe_record_frame (src, flags);
 }
 
 static MetaBackend *
@@ -202,6 +204,7 @@ static void
 sync_cursor_state (MetaScreenCastMonitorStreamSrc *monitor_src)
 {
   MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (monitor_src);
+  MetaScreenCastRecordFlag flags;
 
   if (!is_cursor_in_stream (monitor_src))
     return;
@@ -209,7 +212,8 @@ sync_cursor_state (MetaScreenCastMonitorStreamSrc *monitor_src)
   if (is_redraw_queued (monitor_src))
     return;
 
-  meta_screen_cast_stream_src_maybe_record_frame (src);
+  flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
+  meta_screen_cast_stream_src_maybe_record_frame (src, flags);
 }
 
 static void
diff --git a/src/backends/meta-screen-cast-stream-src.c b/src/backends/meta-screen-cast-stream-src.c
index 617aff4d0e..78b7c693d3 100644
--- a/src/backends/meta-screen-cast-stream-src.c
+++ b/src/backends/meta-screen-cast-stream-src.c
@@ -437,7 +437,8 @@ do_record_frame (MetaScreenCastStreamSrc *src,
 }
 
 void
-meta_screen_cast_stream_src_maybe_record_frame (MetaScreenCastStreamSrc *src)
+meta_screen_cast_stream_src_maybe_record_frame (MetaScreenCastStreamSrc  *src,
+                                                MetaScreenCastRecordFlag  flags)
 {
   MetaScreenCastStreamSrcPrivate *priv =
     meta_screen_cast_stream_src_get_instance_private (src);
diff --git a/src/backends/meta-screen-cast-stream-src.h b/src/backends/meta-screen-cast-stream-src.h
index 26d2919808..d7c39a7e24 100644
--- a/src/backends/meta-screen-cast-stream-src.h
+++ b/src/backends/meta-screen-cast-stream-src.h
@@ -37,6 +37,11 @@
 
 typedef struct _MetaScreenCastStream MetaScreenCastStream;
 
+typedef enum _MetaScreenCastRecordFlag
+{
+  META_SCREEN_CAST_RECORD_FLAG_NONE = 0,
+} MetaScreenCastRecordFlag;
+
 #define META_TYPE_SCREEN_CAST_STREAM_SRC (meta_screen_cast_stream_src_get_type ())
 G_DECLARE_DERIVABLE_TYPE (MetaScreenCastStreamSrc,
                           meta_screen_cast_stream_src,
@@ -63,7 +68,8 @@ struct _MetaScreenCastStreamSrcClass
                                 struct spa_meta_cursor  *spa_meta_cursor);
 };
 
-void meta_screen_cast_stream_src_maybe_record_frame (MetaScreenCastStreamSrc *src);
+void meta_screen_cast_stream_src_maybe_record_frame (MetaScreenCastStreamSrc  *src,
+                                                     MetaScreenCastRecordFlag  flags);
 
 int meta_screen_cast_stream_src_get_stride (MetaScreenCastStreamSrc *src);
 
diff --git a/src/backends/meta-screen-cast-window-stream-src.c 
b/src/backends/meta-screen-cast-window-stream-src.c
index 3f141d264d..b3217330fb 100644
--- a/src/backends/meta-screen-cast-window-stream-src.c
+++ b/src/backends/meta-screen-cast-window-stream-src.c
@@ -327,8 +327,10 @@ screen_cast_window_damaged (MetaWindowActor               *actor,
                             MetaScreenCastWindowStreamSrc *window_src)
 {
   MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (window_src);
+  MetaScreenCastRecordFlag flags;
 
-  meta_screen_cast_stream_src_maybe_record_frame (src);
+  flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
+  meta_screen_cast_stream_src_maybe_record_frame (src, flags);
 }
 
 static void
@@ -365,6 +367,7 @@ static void
 sync_cursor_state (MetaScreenCastWindowStreamSrc *window_src)
 {
   MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (window_src);
+  MetaScreenCastRecordFlag flags;
 
   if (!is_cursor_in_stream (window_src))
     return;
@@ -372,7 +375,8 @@ sync_cursor_state (MetaScreenCastWindowStreamSrc *window_src)
   if (meta_screen_cast_window_has_damage (window_src->screen_cast_window))
     return;
 
-  meta_screen_cast_stream_src_maybe_record_frame (src);
+  flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
+  meta_screen_cast_stream_src_maybe_record_frame (src, flags);
 }
 
 static void
@@ -401,6 +405,7 @@ meta_screen_cast_window_stream_src_enable (MetaScreenCastStreamSrc *src)
   MetaCursorTracker *cursor_tracker = meta_backend_get_cursor_tracker (backend);
   MetaWindowActor *window_actor;
   MetaScreenCastStream *stream;
+  MetaScreenCastRecordFlag flags;
 
   window_actor = meta_window_actor_from_window (get_window (window_src));
   if (!window_actor)
@@ -438,7 +443,8 @@ meta_screen_cast_window_stream_src_enable (MetaScreenCastStreamSrc *src)
       break;
     }
 
-  meta_screen_cast_stream_src_maybe_record_frame (src);
+  flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
+  meta_screen_cast_stream_src_maybe_record_frame (src, flags);
 }
 
 static void