[test] Add group-paint

The experience of running the entire test suite under cairo_push_group()
did at least reveal that there was a potential bug in the pdf backend.
This test is just the simplest of drawing operations - simply filling
the similar surface with solid blue, and then blitting that surface to
the destination.

test/.gitignore

@@ -84,6 +84,7 @@ glitz-surface-source
 glyph-cache-pressure
 gradient-alpha
 gradient-zero-stops
+group-paint
 imagediff
 image-surface-source
 infinite-join

test/Makefile.am

@@ -64,6 +64,7 @@ get-group-target$(EXEEXT)				\
 get-path-extents$(EXEEXT)				\
 gradient-alpha$(EXEEXT)					\
 gradient-zero-stops$(EXEEXT)				\
+group-paint$(EXEEXT)					\
 image-surface-source$(EXEEXT)				\
 infinite-join$(EXEEXT)					\
 in-fill-empty-trapezoid$(EXEEXT)			\
@@ -425,6 +426,7 @@ REFERENCE_IMAGES = \
 	gradient-alpha-rgb24-ref.png	\
 	gradient-zero-stops-ref.png	\
 	gradient-zero-stops-rgb24-ref.png	\
+	group-paint-ref.png	\
 	image-surface-source-ref.png \
 	infinite-join-ref.png	\
 	infinite-join-ps-ref.png	\

test/group-paint.c

@@ -0,0 +1,57 @@
+/*
+ * Copyright © Chris Wilson, 2008
+ *
+ * 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
+ * Chris Wilson 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.
+ *
+ * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL CHRIS WILSON 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.
+ *
+ * Authors: Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairo-test.h"
+
+static cairo_test_draw_function_t draw;
+
+cairo_test_t test = {
+    "group-paint",
+    "test push_group(); pop_group_to_source(); set_operator(SOURCE); paint();",
+    10, 10,
+    draw
+};
+
+
+static cairo_test_status_t
+draw (cairo_t *cr, int dst_width, int dst_height)
+{
+    cairo_push_group (cr);
+
+    cairo_set_source_rgb (cr, 0, 0, 1);
+    cairo_paint (cr);
+
+    cairo_pop_group_to_source (cr);
+    cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+    cairo_paint (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}