gsl-shell.git - gsl-shell

diff --git a/agg-plot/canvas.h b/agg-plot/canvas.h
index 25a1e258..f5304bec 100644
--- a/agg-plot/canvas.h
+++ b/agg-plot/canvas.h

@@ -75,6 +75,12 @@ public:

void clear() { rb.clear(bg_color); };

+ void clear_box(int x1, int y1, int width, int height)

+ {

+ for (int y = y1; y < y1 + height; y++)

+ rb.copy_hline (x1, y, x1 + width, bg_color);

+ };

+

template<class VertexSource>

void draw(VertexSource& vs, agg::rgba8 c)

{