Add new paint-repeat test

I added this test originally to make it easier to debug
some recent bugs, (the test suite did have some repeating
in the checkered backgrounds, but with an offset of 0,
and then also in trap clip with an offset larger than the
surface itself). This test exercises repeating more directly.

It also triggers a bug in the PostScript backend that I've
not yet investigated. So the test does fail currently.

test/.gitignore

@@ -77,6 +77,7 @@ nil-surface
 operator-clear
 operator-source
 paint
+paint-repeat
 paint-source-alpha
 paint-with-alpha
 path-data

test/Makefile.am

@@ -57,6 +57,7 @@ nil-surface			\
 operator-clear			\
 operator-source			\
 paint				\
+paint-repeat			\
 paint-source-alpha		\
 paint-with-alpha		\
 pattern-get-type		\
@@ -273,6 +274,7 @@ operator-clear-rgb24-ref.png				\
 operator-source-ref.png					\
 operator-source-rgb24-ref.png				\
 paint-ref.png						\
+paint-repeat-ref.png					\
 paint-source-alpha-ref.png				\
 paint-source-alpha-pdf-argb32-ref.png			\
 paint-source-alpha-svg-ref.png				\

test/paint-repeat.c

@@ -0,0 +1,66 @@
+/*
+ * Copyright © 2005 Red Hat, Inc.
+ *
+ * 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
+ * Red Hat, Inc. not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Red Hat, Inc. makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL RED HAT, INC. 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: Carl D. Worth <cworth@cworth.org>
+ */
+
+#include "cairo-test.h"
+
+static cairo_test_draw_function_t draw;
+
+cairo_test_t test = {
+    "paint-repeat",
+    "Test calls to cairo_paint with a repeating source surface pattern",
+    8, 8,
+    draw
+};
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_surface_t *surface;
+    static uint32_t data[16] = {
+	0xffffffff, 0xffffffff,		0xffff0000, 0xffff0000,
+	0xffffffff, 0xffffffff,		0xffff0000, 0xffff0000,
+
+	0xff00ff00, 0xff00ff00,		0xff0000ff, 0xff0000ff,
+	0xff00ff00, 0xff00ff00,		0xff0000ff, 0xff0000ff
+    };
+
+    surface = cairo_image_surface_create_for_data ((unsigned char *) data,
+						   CAIRO_FORMAT_RGB24, 4, 4, 16);
+
+    cairo_set_source_surface (cr, surface, 2, 2);
+    cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_NEAREST);
+    cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REPEAT);
+    cairo_paint (cr);
+
+    cairo_surface_destroy (surface);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}