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, 3 insertions, 3 deletions

diff --git a/gsk/gskcairorenderer.c b/gsk/gskcairorenderer.c
index d0766c7450..282bb0f416 100644
--- a/gsk/gskcairorenderer.c
+++ b/gsk/gskcairorenderer.c
@@ -123,11 +123,11 @@ gsk_cairo_renderer_render_node (GskCairoRenderer *self,
 }
 
 static void
-gsk_cairo_renderer_render (GskRenderer *renderer,
-                           GskRenderNode *root,
-                           GdkDrawingContext *context)
+gsk_cairo_renderer_render (GskRenderer   *renderer,
+                           GskRenderNode *root)
 {
   GskCairoRenderer *self = GSK_CAIRO_RENDERER (renderer);
+  GdkDrawingContext *context = gsk_renderer_get_drawing_context (renderer);
   cairo_t *cr = gdk_drawing_context_get_cairo_context (context); 
 
   gsk_renderer_get_viewport (renderer, &self->viewport);