Add a context_update() virtual function

This permits us to flush and swap buffers when needed.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/cairo-image.cpp b/src/cairo-image.cpp
index 7c47ac8..7a9755c 100644
--- a/src/cairo-image.cpp
+++ b/src/cairo-image.cpp
@@ -39,3 +39,7 @@ destroy_cairo_image(void)
     cleanup_state_image(state);
 }
 
+void
+update_cairo_image(void)
+{
+}