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diff --git a/BMPGraphing.h b/BMPGraphing.h
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+/*============================================================================
+  BMPGraphing, a library for graphing.
+  Copyright (C) 2005-2014 by Zack T Smith.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+  The author may be reached at veritas@comcast.net.
+ *===========================================================================*/
+
+#ifndef _SUPERSIMPLEGRAPHING_H
+#define _SUPERSIMPLEGRAPHING_H
+
+#include <stdbool.h>
+
+#define SSG_RELEASE "0.2"
+
+#define XVALUE_MIN (15)
+#define XVALUE_MAX (28)
+
+enum {
+	DATUM_X=0,
+	DATUM_Y=1,
+	DATUM_COLOR=2,
+};
+
+typedef long Coordinate;
+typedef long long Value;
+
+enum {
+	MODE_X_AXIS_LINEAR = 0,
+	MODE_X_AXIS_LOG2 = 1,
+};
+
+//---------------
+// Graphing data.
+//
+typedef struct {
+	BMP *image;
+	char *title;
+
+	unsigned char x_axis_mode;
+
+	Coordinate width;
+	Coordinate height;
+	Coordinate left_margin;
+	Coordinate margin;
+	Coordinate last_x;
+	Coordinate last_y;
+	Coordinate x_span;
+	Coordinate y_span;
+	Coordinate legend_y;
+
+	RGB fg;
+#define MAX_GRAPH_DATA 50000
+	Value data [MAX_GRAPH_DATA];
+	int data_index;
+#define DASHED 0x1000000 // dashed line flag
+
+	Value max_y;
+	Value min_y;
+	Value min_x;
+	Value max_x;
+} BMPGraph;
+
+extern void BMPGraphing_set_title (BMPGraph*, const char *);
+extern void BMPGraphing_draw_labels_log2 (BMPGraph*);
+extern BMPGraph *BMPGraphing_new (int w, int h, int x_axis_mode);
+extern void BMPGraphing_new_line (BMPGraph *, char *str, RGB color);
+extern void BMPGraphing_add_point (BMPGraph *, Value x, Value y);
+extern void BMPGraphing_plot_log2 (BMPGraph *, Value x, Value y);
+extern void BMPGraphing_plot_linear (BMPGraph *, Value x, Value y, Value max_amt);
+extern void BMPGraphing_make (BMPGraph*);
+extern BMP *BMPGraphing_get_graph (BMPGraph*);
+extern void BMPGraphing_destroy (BMPGraph*);
+
+#endif