[gtk/wip/chergert/glproto: 466/526] wait to get render region until after starting frame

[Christian Hergert <chergert src gnome org>]

commit 8499c00947fdee1f4912d70cc0eb16af97b2096f
Author: Christian Hergert <chergert redhat com>
Date:   Sun Feb 7 18:50:36 2021 -0800

    wait to get render region until after starting frame

 gsk/next/gskglrenderer.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/gsk/next/gskglrenderer.c b/gsk/next/gskglrenderer.c
index 804accc83b..ee1dd75af2 100644
--- a/gsk/next/gskglrenderer.c
+++ b/gsk/next/gskglrenderer.c
@@ -199,7 +199,6 @@ gsk_next_renderer_render (GskRenderer          *renderer,
 
   surface = gdk_draw_context_get_surface (GDK_DRAW_CONTEXT (self->context));
   scale_factor = gdk_surface_get_scale_factor (surface);
-  render_region = get_render_region (surface, self->context);
 
   viewport.origin.x = 0;
   viewport.origin.y = 0;
@@ -209,6 +208,9 @@ gsk_next_renderer_render (GskRenderer          *renderer,
   gdk_gl_context_make_current (self->context);
   gdk_draw_context_begin_frame (GDK_DRAW_CONTEXT (self->context), update_area);
 
+  /* Must be called *after* gdk_draw_context_begin_frame() */
+  render_region = get_render_region (surface, self->context);
+
   gsk_next_driver_begin_frame (self->driver, self->command_queue);
   job = gsk_gl_render_job_new (self->driver, &viewport, scale_factor, render_region, 0);
 #ifdef G_ENABLE_DEBUG