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c1f500c)
\c void (*draw_update)(void *handle, int x, int y, int w, int h);
This function behaves exactly like the back end \cw{draw_update()}
\c void (*draw_update)(void *handle, int x, int y, int w, int h);
This function behaves exactly like the back end \cw{draw_update()}
-function; see \k{drawing-draw-text}.
+function; see \k{drawing-draw-update}.
An implementation of this API which only supports printing is
permitted to define this function pointer to be \cw{NULL} rather
An implementation of this API which only supports printing is
permitted to define this function pointer to be \cw{NULL} rather