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-rw-r--r--fastiv-view.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fastiv-view.c b/fastiv-view.c
index f55fd49..9ed93f8 100644
--- a/fastiv-view.c
+++ b/fastiv-view.c
@@ -188,8 +188,16 @@ fastiv_view_realize(GtkWidget *widget)
&attributes, GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL);
// Without the following call, or the rendering mode set to "recording",
- // RGB30 degrades to RGB24. It completely breaks the Quartz backend.
+ // RGB30 degrades to RGB24, because gdk_window_begin_paint_internal()
+ // creates backing stores using cairo_content_t constants.
+ //
+ // It completely breaks the Quartz backend, so limit it to X11.
#ifdef GDK_WINDOWING_X11
+ // FIXME: This causes some flicker while scrolling, because it disables
+ // double buffering, see: https://gitlab.gnome.org/GNOME/gtk/-/issues/2560
+ //
+ // If GTK+'s OpenGL integration fails to deliver, we need to use the window
+ // directly, sidestepping the toolkit entirely.
if (GDK_IS_X11_WINDOW(window))
gdk_window_ensure_native(window);
#endif // GDK_WINDOWING_X11