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+/*
+ * Copyright 2009 John-Mark Bell <jmb@netsurf-browser.org>
+ *
+ * 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/>.
+ */
+
+#ifndef NETSURF_CSS_UTILS_H_
+#define NETSURF_CSS_UTILS_H_
+
+#include <libcss/libcss.h>
+
+#include "netsurf/css.h"
+
+/** DPI of the screen, in fixed point units */
+extern css_fixed nscss_screen_dpi;
+
+/**
+ * Convert an absolute CSS length to points.
+ *
+ * \param[in] length Absolute CSS length.
+ * \param[in] unit Unit of the length.
+ * \return length in points
+ */
+css_fixed nscss_len2pt(css_fixed length, css_unit unit);
+
+/**
+ * Convert a CSS length to pixels.
+ *
+ * \param length Length to convert
+ * \param unit Corresponding unit
+ * \param style Computed style applying to length. May be NULL if unit is
+ * neither em nor ex
+ * \return length in pixels
+ */
+css_fixed nscss_len2px(css_fixed length, css_unit unit, const css_computed_style *style);
+
+#endif