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diff --git a/desktop/plot_style.h b/desktop/plot_style.h
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+++ b/desktop/plot_style.h
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+/*
+ * Copyright 2004 James Bursa <bursa@users.sourceforge.net>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf 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; version 2 of the License.
+ *
+ * NetSurf 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file
+ * Ploter styles.
+ */
+
+#ifndef _NETSURF_DESKTOP_PLOT_STYLE_H_
+#define _NETSURF_DESKTOP_PLOT_STYLE_H_
+
+/* html widget colours */
+#define WIDGET_BASEC 0xd9d9d9
+#define WIDGET_BLOBC 0x000000
+
+/* Darken a colour by taking three quaters of each channels intensity */
+#define darken_colour(c1)				 \
+	((((3 * (c1 >> 16)) >> 2) << 16) |		 \
+	 (((3 * ((c1 >> 8) & 0xff)) >> 2) << 8) |	 \
+	 (((3 * (c1 & 0xff)) >> 2) << 0))
+
+/* Darken a colour by taking nine sixteenths of each channels intensity */
+#define double_darken_colour(c1)			 \
+	((((9 * (c1 >> 16)) >> 4) << 16) |		 \
+	 (((9 * ((c1 >> 8) & 0xff)) >> 4) << 8) |	 \
+	 (((9 * (c1 & 0xff)) >> 4) << 0))
+
+/* Lighten a colour by taking three quaters of each channels intensity
+ * and adding a full quater 
+ */
+#define lighten_colour(c1)						\
+	(((((3 * (c1 >> 16)) >> 2) + 64) << 16) |			\
+	 ((((3 * ((c1 >> 8) & 0xff)) >> 2) + 64) << 8) |		\
+	 ((((3 * (c1 & 0xff)) >> 2) + 64) << 0))
+
+/* Lighten a colour by taking nine sixteenths of each channels intensity and adding a full intensity 7/16ths */
+#define double_lighten_colour(c1)				 \
+	(((((9 * (c1 >> 16)) >> 4) + 112) << 16) |		 \
+	 ((((9 * ((c1 >> 8) & 0xff)) >> 4) + 112) << 8) |	 \
+	 ((((9 * (c1 & 0xff)) >> 4) + 112) << 0))
+
+typedef enum {
+    PLOT_OP_TYPE_NONE = 0, /**< No operation */
+    PLOT_OP_TYPE_SOLID, /**< Solid colour */
+    PLOT_OP_TYPE_DOT, /**< Doted plot */
+    PLOT_OP_TYPE_DASH, /**< dashed plot */
+} plot_operation_type_t;
+
+typedef struct {
+    plot_operation_type_t stroke_type;
+    int stroke_width;
+    colour stroke_colour;
+    plot_operation_type_t fill_type; 
+    colour fill_colour;
+} plot_style_t;
+
+/* global fill styles */
+extern plot_style_t *plot_style_fill_white;
+extern plot_style_t *plot_style_fill_red;
+extern plot_style_t *plot_style_fill_black;
+
+/* global stroke styles */
+extern plot_style_t *plot_style_stroke_red;
+extern plot_style_t *plot_style_stroke_blue;
+extern plot_style_t *plot_style_stroke_yellow;
+
+/* other styles */
+extern plot_style_t *plot_style_caret;
+extern plot_style_t *plot_style_stroke_history;
+extern plot_style_t *plot_style_fill_wbasec;
+extern plot_style_t *plot_style_fill_wblobc;
+extern plot_style_t *plot_style_stroke_wblobc;
+extern plot_style_t *plot_style_stroke_darkwbasec;
+extern plot_style_t *plot_style_stroke_lightwbasec;
+
+#endif