diff --git a/graph.h b/graph.h
new file mode 100644
index 0000000..57c5bd3
--- /dev/null
+++ b/graph.h
@@ -0,0 +1,23 @@
+#ifndef GRAPH_H
+#define GRAPH_H
+
+struct graph;
+
+struct graph *graph_new(int xdim, int ydim);
+void bar_graph_draw(struct graph *g, cairo_t *cr);
+void line_graph_draw(struct graph *g, cairo_t *cr);
+void line_graph_set_data_count_limit(struct graph *g, int per_label_limit);
+void graph_title(struct graph *g, const char *title);
+void graph_x_title(struct graph *g, const char *title);
+void graph_y_title(struct graph *g, const char *title);
+void graph_add_label(struct graph *g, const char *label);
+void graph_add_data(struct graph *g, const char *label, const double value);
+void graph_add_xy_data(struct graph *g, const char *label,
+		const double x, const double y);
+void graph_set_color(struct graph *g, const char *label,
+		double red, double green, double blue);
+void graph_free(struct graph *bg);
+
+
+#endif
+