Add new test get-group-target (currently failing with paginated).

This test exercises the combination of cairo_get_group_target along
with cairo_surface_get_device_offset. Something funny is currently
going on with the surfaces based on the paginated surface.

test/.gitignore

@@ -34,6 +34,7 @@ filter-nearest-offset
 ft-font-create-for-ft-face
 font-face-get-type
 get-and-set
+get-group-target
 gradient-alpha
 imagediff
 leaky-dash

test/Makefile.am

@@ -29,6 +29,7 @@ fill-rule			\
 filter-nearest-offset		\
 font-face-get-type		\
 get-and-set			\
+get-group-target		\
 gradient-alpha			\
 leaky-dash			\
 leaky-polygon			\
@@ -171,6 +172,7 @@ fill-rule-ref.png					\
 fill-rule-rgb24-ref.png					\
 fill-rule-ps-argb32-ref.png				\
 filter-nearest-offset-ref.png				\
+get-group-target-ref.png				\
 gradient-alpha-ref.png					\
 gradient-alpha-rgb24-ref.png				\
 leaky-dash-ref.png					\

test/get-group-target.c

@@ -0,0 +1,80 @@
+/*
+ * Copyright © 2006 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"
+
+#define SIZE 8
+#define PAD 2
+
+cairo_test_t test = {
+    "get-group-target",
+    "Test of both cairo_get_group_target and cairo_surface_get_device_offset",
+    SIZE, SIZE
+};
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_surface_t *group;
+    double x, y;
+
+    /* First paint background in blue. */
+    cairo_set_source_rgb (cr, 0.0, 0.0, 1.0);
+    cairo_paint (cr);
+
+    /* Then clip so that the group surface ends up smaller than the
+     * original surface. */
+    cairo_rectangle (cr, PAD, PAD, width - 2 * PAD, height - 2 * PAD);
+    cairo_clip (cr);
+
+    /* Paint the clipped region in red (which should all be overwritten later). */
+    cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
+    cairo_paint (cr);
+
+    /* Redirect to a new group and get that surface. */
+    cairo_push_group (cr);
+    group = cairo_get_group_target (cr);
+
+    /* Then paint in green what we query the group surface size to be. */
+    cairo_set_source_rgb (cr, 0.0, 1.0, 0.0);
+    cairo_surface_get_device_offset (group, &x, &y);
+    cairo_rectangle (cr,
+		     -x, -y,
+		     width - 2 * PAD,
+		     height - 2 * PAD);
+    cairo_fill (cr);
+
+    /* Finish up the group painting. */
+    cairo_pop_group_to_source (cr);
+    cairo_paint (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test, draw);
+}