test: Exercise rectangular bo bug

Reported-by: S. Christian Collins <s_chriscollins@hotmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=49446
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

test/Makefile.sources

@@ -25,6 +25,7 @@ test_sources = \
 	bilevel-image.c					\
 	bug-40410.c					\
 	bug-bo-rectangular.c				\
+	bug-bo-collins.c				\
 	bug-bo-ricotz.c					\
 	bug-source-cu.c					\
 	bug-extents.c					\

test/bug-bo-collins.c

@@ -0,0 +1,76 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Author: Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairo-test.h"
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_set_source_rgb (cr, 1, 1, 1);
+    cairo_paint (cr);
+    cairo_set_source_rgb (cr, 0, 0, 0);
+
+    cairo_translate (cr, 0, 0);
+    cairo_save (cr);
+    cairo_rectangle (cr, 10, 10, 20, 20);
+    cairo_rectangle (cr, 20, 10, -10, 10);
+    cairo_clip (cr);
+    cairo_paint (cr);
+    cairo_restore (cr);
+
+    cairo_translate (cr, 40, 0);
+    cairo_save (cr);
+    cairo_rectangle (cr, 10, 10, 20, 20);
+    cairo_rectangle (cr, 30, 10, -10, 10);
+    cairo_clip (cr);
+    cairo_paint (cr);
+    cairo_restore (cr);
+
+    cairo_translate (cr, 0, 40);
+    cairo_save (cr);
+    cairo_rectangle (cr, 10, 10, 20, 20);
+    cairo_rectangle (cr, 30, 20, -10, 10);
+    cairo_clip (cr);
+    cairo_paint (cr);
+    cairo_restore (cr);
+
+    cairo_translate (cr, -40, 0);
+    cairo_save (cr);
+    cairo_rectangle (cr, 10, 10, 20, 20);
+    cairo_rectangle (cr, 20, 20, -10, 10);
+    cairo_clip (cr);
+    cairo_paint (cr);
+    cairo_restore (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (bug_bo_collins,
+	    "Exercises a bug discovered by S. Christian Collins",
+	    "clip, rectangular", /* keywords */
+	    NULL, /* requirements */
+	    80, 80,
+	    NULL, draw)