1 files changed, 54 insertions, 0 deletions
diff --git a/deps/uber-graph/uber-scale.c b/deps/uber-graph/uber-scale.c
new file mode 100644
index 00000000..ead9f988
--- /dev/null
+++ b/deps/uber-graph/uber-scale.c
@@ -0,0 +1,54 @@
+/* uber-scale.c
+ *
+ * Copyright (C) 2010 Christian Hergert <chris@dronelabs.com>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "uber-scale.h"
+
+/**
+ * uber_scale_linear:
+ * @range: An #UberRange.
+ * @pixel_range: An #UberRange.
+ * @value: A pointer to the value to translate.
+ * @user_data: user data for scale.
+ *
+ * An #UberScale function to translate a value to the coordinate system in
+ * a linear fashion.
+ *
+ * Returns: %TRUE if successful; otherwise %FALSE.
+ * Side effects: None.
+ */
+gboolean
+uber_scale_linear (const UberRange *range,       /* IN */
+                   const UberRange *pixel_range, /* IN */
+                   gdouble         *value,       /* IN/OUT */
+                   gpointer         user_data)   /* IN */
+{
+	#define A (range->range)
+	#define B (pixel_range->range)
+	#define C (*value)
+	if (*value != 0.) {
+		*value = C * B / A;
+	}
+	#undef A
+	#undef B
+	#undef C
+	return TRUE;
+}