Index: uspace/lib/gfx/include/gfx/coord.h
===================================================================
--- uspace/lib/gfx/include/gfx/coord.h	(revision 7b882c1fb956e7997643c445ef2c7aed9e2891ff)
+++ uspace/lib/gfx/include/gfx/coord.h	(revision cf32dbd4a95cb4b405fc474d3971f4fa4e52a5ad)
@@ -37,9 +37,15 @@
 #define _GFX_COORD_H
 
+#include <stdbool.h>
 #include <types/gfx/coord.h>
 
 extern void gfx_coord2_add(gfx_coord2_t *, gfx_coord2_t *, gfx_coord2_t *);
 extern void gfx_coord2_subtract(gfx_coord2_t *, gfx_coord2_t *, gfx_coord2_t *);
+extern void gfx_span_points_sort(gfx_coord_t, gfx_coord_t, gfx_coord_t *,
+    gfx_coord_t *);
 extern void gfx_rect_translate(gfx_coord2_t *, gfx_rect_t *, gfx_rect_t *);
+extern void gfx_rect_envelope(gfx_rect_t *, gfx_rect_t *, gfx_rect_t *);
+extern void gfx_rect_points_sort(gfx_rect_t *, gfx_rect_t *);
+extern bool gfx_rect_is_empty(gfx_rect_t *);
 
 #endif