test: Add bug-bo-rectangular

Exercises a bug found in the special case rectangular tessellator with
colinear eo edges.

4 files changed, 69 insertions, 0 deletions

diff --git a/test/Makefile.am b/test/Makefile.am
index 12111aa8..77e8237e 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -144,6 +144,7 @@ REFERENCE_IMAGES = \
 	alpha-similar.svg.rgb24.xfail.png \
 	big-line.ref.png \
 	big-line.xlib.ref.png \
+	bug-bo-rectangular.ref.png \
 	bilevel-image.ref.png \
 	bitmap-font.ref.png \
 	bitmap-font.rgb24.ref.png \
diff --git a/test/Makefile.sources b/test/Makefile.sources
index 87c25a01..0f524e1d 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -7,6 +7,7 @@ test_sources = \
 	big-line.c					\
 	big-trap.c					\
 	bilevel-image.c					\
+	bug-bo-rectangular.c				\
 	caps.c						\
 	caps-joins.c					\
 	caps-joins-alpha.c				\
diff --git a/test/bug-bo-rectangular.c b/test/bug-bo-rectangular.c
new file mode 100644
index 00000000..08e2e494
--- /dev/null
+++ b/test/bug-bo-rectangular.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2010 Red Hat
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation, and that the name of
+ * Intel not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Intel makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * RED HAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL RED HAT BE LIABLE FOR ANY SPECIAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+ * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: Benjamin Otte <otte@gnome.com>
+ */
+
+#include "cairo-test.h"
+
+static void
+rect (cairo_t *cr, int x1, int y1, int x2, int y2)
+{
+    cairo_rectangle (cr, x1, y1, x2 - x1, y2 - y1);
+}
+
+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_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
+
+    cairo_scale (cr, 1./256, 1./256);
+
+    rect (cr, 0, 0, 29696, 7680);
+    rect (cr, 0, 0, -15360, 15360);
+    cairo_clip (cr);
+
+    cairo_set_source_rgb (cr, 1, 0.5, 0);
+    cairo_paint (cr);
+
+    rect (cr, 9984, 0, 2969, 3840);
+    rect (cr, 0, 3840, 9472, 7680);
+    cairo_clip (cr);
+
+    rect (cr, 0, 3840, 3584, 7680);
+    cairo_set_source_rgb (cr, 1, 0, 0.5);
+    cairo_fill (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (bug_bo_rectangular,
+	    "Tests a bug found by Benjamin Otte in the rectangular tessellator",
+	    "tessellator", /* keywords */
+	    NULL, /* requirements */
+	    300, 300,
+	    NULL, draw)
diff --git a/test/bug-bo-rectangular.ref.png b/test/bug-bo-rectangular.ref.png
new file mode 100644
index 00000000..ffa4edef
--- /dev/null
+++ b/test/bug-bo-rectangular.ref.png