1 files changed, 191 insertions, 0 deletions
diff --git a/eel/eel-art-extensions.c b/eel/eel-art-extensions.c
new file mode 100644
index 0000000..f9f4c9a
--- /dev/null
+++ b/eel/eel-art-extensions.c
@@ -0,0 +1,191 @@
+/* eel-art-extensions.c - implementation of libart extension functions.
+ *
+ *  Copyright (C) 2000 Eazel, Inc.
+ *
+ *  The Gnome Library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public License as
+ *  published by the Free Software Foundation; either version 2 of the
+ *  License, or (at your option) any later version.
+ *
+ *  The Gnome Library 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
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public
+ *  License along with the Gnome Library; see the file COPYING.LIB.  If not,
+ *  see <http://www.gnu.org/licenses/>.
+ *
+ *  Authors: Darin Adler <darin@eazel.com>
+ *           Ramiro Estrugo <ramiro@eazel.com>
+ */
+
+#include <config.h>
+
+#include "eel-art-extensions.h"
+#include "eel-lib-self-check-functions.h"
+#include <math.h>
+
+const EelDRect eel_drect_empty = { 0.0, 0.0, 0.0, 0.0 };
+const EelIRect eel_irect_empty = { 0, 0, 0, 0 };
+
+static void
+eel_irect_copy (EelIRect       *dest,
+                const EelIRect *src)
+{
+    dest->x0 = src->x0;
+    dest->y0 = src->y0;
+    dest->x1 = src->x1;
+    dest->y1 = src->y1;
+}
+
+static gboolean
+eel_irect_is_empty (const EelIRect *src)
+{
+    return (src->x1 <= src->x0 ||
+            src->y1 <= src->y0);
+}
+
+void
+eel_irect_union (EelIRect       *dest,
+                 const EelIRect *src1,
+                 const EelIRect *src2)
+{
+    if (eel_irect_is_empty (src1))
+    {
+        eel_irect_copy (dest, src2);
+    }
+    else if (eel_irect_is_empty (src2))
+    {
+        eel_irect_copy (dest, src1);
+    }
+    else
+    {
+        dest->x0 = MIN (src1->x0, src2->x0);
+        dest->y0 = MIN (src1->y0, src2->y0);
+        dest->x1 = MAX (src1->x1, src2->x1);
+        dest->y1 = MAX (src1->y1, src2->y1);
+    }
+}
+
+static void
+eel_irect_intersect (EelIRect       *dest,
+                     const EelIRect *src1,
+                     const EelIRect *src2)
+{
+    dest->x0 = MAX (src1->x0, src2->x0);
+    dest->y0 = MAX (src1->y0, src2->y0);
+    dest->x1 = MIN (src1->x1, src2->x1);
+    dest->y1 = MIN (src1->y1, src2->y1);
+}
+
+/**
+ * eel_irect_get_width:
+ *
+ * @rectangle: An EelIRect.
+ *
+ * Returns: The width of the rectangle.
+ *
+ */
+int
+eel_irect_get_width (EelIRect rectangle)
+{
+    return rectangle.x1 - rectangle.x0;
+}
+
+/**
+ * eel_irect_get_height:
+ *
+ * @rectangle: An EelIRect.
+ *
+ * Returns: The height of the rectangle.
+ *
+ */
+int
+eel_irect_get_height (EelIRect rectangle)
+{
+    return rectangle.y1 - rectangle.y0;
+}
+
+
+static void
+eel_drect_copy (EelDRect       *dest,
+                const EelDRect *src)
+{
+    dest->x0 = src->x0;
+    dest->y0 = src->y0;
+    dest->x1 = src->x1;
+    dest->y1 = src->y1;
+}
+
+static gboolean
+eel_drect_is_empty (const EelDRect *src)
+{
+    return (src->x1 <= src->x0 || src->y1 <= src->y0);
+}
+
+void
+eel_drect_union (EelDRect       *dest,
+                 const EelDRect *src1,
+                 const EelDRect *src2)
+{
+    if (eel_drect_is_empty (src1))
+    {
+        eel_drect_copy (dest, src2);
+    }
+    else if (eel_drect_is_empty (src2))
+    {
+        eel_drect_copy (dest, src1);
+    }
+    else
+    {
+        dest->x0 = MIN (src1->x0, src2->x0);
+        dest->y0 = MIN (src1->y0, src2->y0);
+        dest->x1 = MAX (src1->x1, src2->x1);
+        dest->y1 = MAX (src1->y1, src2->y1);
+    }
+}
+
+gboolean
+eel_irect_hits_irect (EelIRect rectangle_a,
+                      EelIRect rectangle_b)
+{
+    EelIRect intersection;
+    eel_irect_intersect (&intersection, &rectangle_a, &rectangle_b);
+    return !eel_irect_is_empty (&intersection);
+}
+
+gboolean
+eel_irect_equal (EelIRect rectangle_a,
+                 EelIRect rectangle_b)
+{
+    return rectangle_a.x0 == rectangle_b.x0
+           && rectangle_a.y0 == rectangle_b.y0
+           && rectangle_a.x1 == rectangle_b.x1
+           && rectangle_a.y1 == rectangle_b.y1;
+}
+
+EelIRect
+eel_irect_offset_by (EelIRect rectangle,
+                     int      x,
+                     int      y)
+{
+    rectangle.x0 += x;
+    rectangle.x1 += x;
+    rectangle.y0 += y;
+    rectangle.y1 += y;
+
+    return rectangle;
+}
+
+EelIRect
+eel_irect_scale_by (EelIRect rectangle,
+                    double   scale)
+{
+    rectangle.x0 *= scale;
+    rectangle.x1 *= scale;
+    rectangle.y0 *= scale;
+    rectangle.y1 *= scale;
+
+    return rectangle;
+}