Add rotate-image-surface-paint test case

This test exercises a clone_similar extents bug noticed by
Benjamin Otte. As expected, the xlib backend fails due to
that bug, (and interestingly, the ps backend is showing a
failure as well).

test/.gitignore

@@ -107,6 +107,7 @@ pthread-show-text
 rectangle-rounding-error
 rectilinear-stroke
 rel-path
+rotate-image-surface-paint
 scale-down-source-surface-paint
 scale-source-surface-paint
 select-font-face

test/Makefile.am

@@ -72,6 +72,7 @@ pixman-rotate			\
 random-intersections		\
 rectangle-rounding-error	\
 rectilinear-stroke		\
+rotate-image-surface-paint	\
 scale-down-source-surface-paint	\
 scale-source-surface-paint	\
 select-font-face		\

test/rotate-image-surface-paint.c

@@ -0,0 +1,97 @@
+/*
+ * Copyright © 2005, 2007 Red Hat, Inc.
+ *
+ * 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: Carl D. Worth <cworth@cworth.org>
+ */
+
+#include "cairo-test.h"
+
+static cairo_test_draw_function_t draw;
+
+#define SIZE 20
+#define PAD 2
+
+cairo_test_t test = {
+    "rotate-image-surface-paint",
+    "Test call sequence: image_surface_create; rotate; set_source_surface; paint",
+    SIZE, SIZE,
+    draw
+};
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_surface_t *surface;
+    int surface_size = sqrt ((SIZE - 2*PAD)*(SIZE - 2*PAD)/2);
+    cairo_t *cr_surface;
+
+    /* Create an image surface with my favorite four colors in each
+     * quadrant. */
+    surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
+					  surface_size, surface_size);
+    cr_surface = cairo_create (surface);
+    cairo_set_source_rgb (cr_surface, 1, 1, 1);
+    cairo_rectangle (cr_surface,
+		     0, 0,
+		     surface_size / 2, surface_size / 2);
+    cairo_fill (cr_surface);
+    cairo_set_source_rgb (cr_surface, 1, 0, 0);
+    cairo_rectangle (cr_surface,
+		     surface_size / 2, 0,
+		     surface_size / 2, surface_size / 2);
+    cairo_fill (cr_surface);
+    cairo_set_source_rgb (cr_surface, 0, 1, 0);
+    cairo_rectangle (cr_surface,
+		     0, surface_size / 2,
+		     surface_size / 2, surface_size / 2);
+    cairo_fill (cr_surface);
+    cairo_set_source_rgb (cr_surface, 0, 0, 1);
+    cairo_rectangle (cr_surface,
+		     surface_size / 2, surface_size / 2,
+		     surface_size / 2, surface_size / 2);
+    cairo_fill (cr_surface);
+    cairo_destroy (cr_surface);
+
+    /* First paint opaque background (black) so we don't need separate
+     * ARGB32 and RGB24 reference images. */
+    cairo_set_source_rgb (cr, 0, 0, 0); /* black */
+    cairo_paint (cr);
+
+    cairo_translate(cr, SIZE/2, SIZE/2);
+    cairo_rotate (cr, M_PI / 4.0);
+    cairo_translate (cr, -surface_size/2, -surface_size/2);
+
+    cairo_set_source_surface (cr, surface, 0, 0);
+    cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_NEAREST);
+    cairo_paint (cr);
+
+    cairo_surface_destroy (surface);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}