diff -r 81c4f73236a4 -r c3f2f16fa4b8 ui/gtk/draw_cairo.h
--- a/ui/gtk/draw_cairo.h	Sat Oct 04 14:54:25 2025 +0200
+++ b/ui/gtk/draw_cairo.h	Sun Oct 19 21:20:08 2025 +0200
@@ -41,7 +41,7 @@
     cairo_t    *cr;
 } UiCairoGraphics;
 
-// ui_canvas_expose
+void ui_drawingarea_draw(UiDrawingArea *drawingarea, cairo_t *cr, int width, int height);
 
 #ifdef	__cplusplus
 }