gsk: Flush the GL render items cache

Whenever the render tree changes we want to drop the RenderItem arrays,
as each item contains a pointer to the GskRenderNode which becomes
dangling once the root node changed.

diff --git a/gsk/gskglrenderer.c b/gsk/gskglrenderer.c
index 53945ee7a46f1e6a5d984dae0600d4f4ba62c395..40febcad43cee7af24f0cb7b8daf155eda3bce21 100644 (file)
--- a/gsk/gskglrenderer.c
+++ b/gsk/gskglrenderer.c
@@ -952,6 +952,30 @@ out:
                              self->transparent_render_items->len));
 }
 
+static void
+gsk_gl_renderer_clear_tree (GskRenderer *renderer,
+                            GskRenderNode *root_node)
+{
+  GskGLRenderer *self = GSK_GL_RENDERER (renderer);
+
+  if (self->context == NULL)
+    return;
+
+  gdk_gl_context_make_current (self->context);
+
+  g_clear_pointer (&self->opaque_render_items, g_array_unref);
+  g_clear_pointer (&self->transparent_render_items, g_array_unref);
+
+  if (gsk_renderer_is_realized (renderer))
+    {
+      self->opaque_render_items = g_array_sized_new (FALSE, FALSE, sizeof (RenderItem), 16);
+      g_array_set_clear_func (self->opaque_render_items, render_item_clear);
+
+      self->transparent_render_items = g_array_sized_new (FALSE, FALSE, sizeof (RenderItem), 16);
+      g_array_set_clear_func (self->opaque_render_items, render_item_clear);
+    }
+}
+
 static void
 gsk_gl_renderer_clear (GskRenderer *renderer)
 {
@@ -1051,6 +1075,7 @@ gsk_gl_renderer_class_init (GskGLRendererClass *klass)
   renderer_class->update = gsk_gl_renderer_update;
   renderer_class->clear = gsk_gl_renderer_clear;
   renderer_class->validate_tree = gsk_gl_renderer_validate_tree;
+  renderer_class->clear_tree = gsk_gl_renderer_clear_tree;
   renderer_class->render = gsk_gl_renderer_render;
 }