gsk: Make GskRenderer.render() drawing context-agnostic

We're going to need to allow rendering on a specific cairo_t in order to
implement fallback code paths inside GTK; this means that there will be
times when we have a transient GskRenderer instance that does not have a
GdkDrawingContext to draw on.

Instead of adding a new render() implementation for those cases and then
decide which one to use, we can remove the drawing context argument from
the virtual function itself, and allow using a NULL GdkDrawingContext
when calling gsk_renderer_render(). A later commit will add a generic
function to create a transient GskRenderer with a cairo_t attached to
it.

Renderers inside GSK will have to check whether we have access to a
GdkDrawingContext, in which case we're going to use it; or if we have
access to a cairo_t and a window.

1 files changed, 1 insertions, 2 deletions

diff --git a/gsk/gskrendererprivate.h b/gsk/gskrendererprivate.h
index d560d0183d..12671886f0 100644
--- a/gsk/gskrendererprivate.h
+++ b/gsk/gskrendererprivate.h
@@ -41,8 +41,7 @@ struct _GskRendererClass
   void (* unrealize) (GskRenderer *renderer);
 
   void (* render) (GskRenderer *renderer,
-                   GskRenderNode *root,
-                   GdkDrawingContext *context);
+                   GskRenderNode *root);
 };
 
 gboolean gsk_renderer_is_realized (GskRenderer *renderer);