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-rw-r--r--src/glitzint.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/glitzint.h b/src/glitzint.h
index e8a9763..6e24d44 100644
--- a/src/glitzint.h
+++ b/src/glitzint.h
@@ -390,6 +390,12 @@ typedef struct glitz_backend {
glitz_bool_t
(*swap_buffers) (void *drawable);
+ glitz_bool_t
+ (*copy_sub_buffer) (void *drawable,
+ int x,
+ int y,
+ int width,
+ int height);
glitz_context_t *
(*create_context) (void *drawable,