Added fix for mozilla#1587008 - flickering during GL resize.

1 files changed, 189 insertions, 0 deletions

diff --git a/mozilla-1587008.patch b/mozilla-1587008.patch
new file mode 100644
index 0000000..8daf72e
--- /dev/null
+++ b/mozilla-1587008.patch
@@ -0,0 +1,189 @@
+changeset:   498019:9961a0e4d424
+tag:         tip
+parent:      498006:3fa65bda1e50
+user:        Martin Stransky <stransky@redhat.com>
+date:        Tue Oct 08 13:32:37 2019 +0200
+files:       widget/gtk/mozcontainer.cpp
+description:
+Bug 1587008 - [Wayland/GL] Fixed visual glitches with gl compositor during window resize, r=jhorak
+
+Recently we update egl_window size only in moz_container_size_allocate() which is leads
+to visible visual glitches as moz_container_size_allocate() is not called during window resize but
+after it.
+
+We need to update egl_window size faster which is done in configure-event callback.
+
+Differential Revision: https://phabricator.services.mozilla.com/D48526
+
+
+diff --git a/widget/gtk/mozcontainer.cpp b/widget/gtk/mozcontainer.cpp
+--- a/widget/gtk/mozcontainer.cpp
++++ b/widget/gtk/mozcontainer.cpp
+@@ -136,16 +136,60 @@ void moz_container_put(MozContainer* con
+   container->children = g_list_append(container->children, child);
+ 
+   /* we assume that the caller of this function will have already set
+      the parent GdkWindow because we can have many anonymous children. */
+   gtk_widget_set_parent(child_widget, GTK_WIDGET(container));
+ }
+ 
+ /* static methods */
++#if defined(MOZ_WAYLAND)
++static gint moz_container_get_scale(MozContainer* container) {
++  static auto sGdkWindowGetScaleFactorPtr =
++      (gint(*)(GdkWindow*))dlsym(RTLD_DEFAULT, "gdk_window_get_scale_factor");
++
++  if (sGdkWindowGetScaleFactorPtr) {
++    GdkWindow* window = gtk_widget_get_window(GTK_WIDGET(container));
++    return (*sGdkWindowGetScaleFactorPtr)(window);
++  }
++
++  return 1;
++}
++
++static void moz_container_resize(MozContainer* container, int width,
++                                 int height) {
++  // Set correct scaled/unscaled mozcontainer offset
++  // especially when wl_egl is used but we don't recreate it as Gtk+ does.
++  if (container->subsurface) {
++    gint x, y;
++    gdk_window_get_position(gtk_widget_get_window(GTK_WIDGET(container)), &x,
++                            &y);
++    wl_subsurface_set_position(container->subsurface, x, y);
++  }
++
++  // Try to only resize wl_egl_window on scale factor change.
++  // It's a bit risky as Gtk+ recreates it at that event.
++  if (container->eglwindow) {
++    gint scale = moz_container_get_scale(container);
++    if (container->surface) {
++      wl_surface_set_buffer_scale(container->surface, scale);
++    }
++    wl_egl_window_resize(container->eglwindow, width * scale, height * scale, 0,
++                         0);
++  }
++}
++
++static gboolean moz_container_configure_event_cb(GtkWidget* widget,
++                                                 GdkEventConfigure* event) {
++  LOG(("moz_container_egl_window_configure_event_cb [%p] %d %d %d %d\n",
++       (void*)widget, event->x, event->y, event->width, event->height));
++  moz_container_resize(MOZ_CONTAINER(widget), event->width, event->height);
++  return FALSE;
++}
++#endif
+ 
+ void moz_container_class_init(MozContainerClass* klass) {
+   /*GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+     GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass); */
+   GtkContainerClass* container_class = GTK_CONTAINER_CLASS(klass);
+   GtkWidgetClass* widget_class = GTK_WIDGET_CLASS(klass);
+ 
+   widget_class->map = moz_container_map;
+@@ -173,16 +217,21 @@ void moz_container_init(MozContainer* co
+   container->subsurface = nullptr;
+   container->eglwindow = nullptr;
+   container->frame_callback_handler = nullptr;
+   container->frame_callback_handler_surface_id = -1;
+   // We can draw to x11 window any time.
+   container->ready_to_draw = GDK_IS_X11_DISPLAY(gdk_display_get_default());
+   container->surface_needs_clear = true;
+   container->inital_draw_cb = nullptr;
++
++  // We need faster resize response in mozcontainer to avoid visual glitches
++  // during window resize.
++  g_signal_connect(container, "configure_event",
++                   G_CALLBACK(moz_container_configure_event_cb), nullptr);
+ #endif
+ 
+   LOG(("%s [%p]\n", __FUNCTION__, (void*)container));
+ }
+ 
+ #if defined(MOZ_WAYLAND)
+ void moz_container_set_initial_draw_callback(
+     MozContainer* container, std::function<void(void)> inital_draw_cb) {
+@@ -285,53 +334,26 @@ static void moz_container_unmap_wayland(
+   container->frame_callback_handler_surface_id = -1;
+ 
+   container->surface_needs_clear = true;
+   container->ready_to_draw = false;
+ 
+   LOGWAYLAND(("%s [%p]\n", __FUNCTION__, (void*)container));
+ }
+ 
+-static gint moz_container_get_scale(MozContainer* container) {
+-  static auto sGdkWindowGetScaleFactorPtr =
+-      (gint(*)(GdkWindow*))dlsym(RTLD_DEFAULT, "gdk_window_get_scale_factor");
+-
+-  if (sGdkWindowGetScaleFactorPtr) {
+-    GdkWindow* window = gtk_widget_get_window(GTK_WIDGET(container));
+-    return (*sGdkWindowGetScaleFactorPtr)(window);
+-  }
+-
+-  return 1;
+-}
+-
+ void moz_container_scale_changed(MozContainer* container,
+                                  GtkAllocation* aAllocation) {
+   LOGWAYLAND(("%s [%p] surface %p eglwindow %p\n", __FUNCTION__,
+               (void*)container, (void*)container->surface,
+               (void*)container->eglwindow));
+ 
+   if (!container->surface) {
+     return;
+   }
+-
+-  // Set correct scaled/unscaled mozcontainer offset
+-  // especially when wl_egl is used but we don't recreate it as Gtk+ does.
+-  gint x, y;
+-  gdk_window_get_position(gtk_widget_get_window(GTK_WIDGET(container)), &x, &y);
+-  wl_subsurface_set_position(container->subsurface, x, y);
+-
+-  // Try to only resize wl_egl_window on scale factor change.
+-  // It's a bit risky as Gtk+ recreates it at that event.
+-  if (container->eglwindow) {
+-    gint scale = moz_container_get_scale(container);
+-    wl_surface_set_buffer_scale(container->surface,
+-                                moz_container_get_scale(container));
+-    wl_egl_window_resize(container->eglwindow, aAllocation->width * scale,
+-                         aAllocation->height * scale, 0, 0);
+-  }
++  moz_container_resize(container, aAllocation->width, aAllocation->height);
+ }
+ #endif
+ 
+ void moz_container_map(GtkWidget* widget) {
+   MozContainer* container;
+   GList* tmp_list;
+   GtkWidget* tmp_child;
+ 
+@@ -451,26 +473,18 @@ void moz_container_size_allocate(GtkWidg
+                            allocation->y, allocation->width,
+                            allocation->height);
+   }
+ 
+ #if defined(MOZ_WAYLAND)
+   // We need to position our subsurface according to GdkWindow
+   // when offset changes (GdkWindow is maximized for instance).
+   // see gtk-clutter-embed.c for reference.
+-  if (container->subsurface) {
+-    gint x, y;
+-    gdk_window_get_position(gtk_widget_get_window(widget), &x, &y);
+-    wl_subsurface_set_position(container->subsurface, x, y);
+-  }
+-  if (container->eglwindow) {
+-    gint scale = moz_container_get_scale(container);
+-    wl_egl_window_resize(container->eglwindow, allocation->width * scale,
+-                         allocation->height * scale, 0, 0);
+-  }
++  moz_container_resize(MOZ_CONTAINER(widget), allocation->width,
++                       allocation->height);
+ #endif
+ }
+ 
+ void moz_container_remove(GtkContainer* container, GtkWidget* child_widget) {
+   MozContainerChild* child;
+   MozContainer* moz_container;
+   GdkWindow* parent_window;
+ 
+