1 files changed, 54 insertions, 0 deletions
diff --git a/test/self-copy-overlap.c b/test/self-copy-overlap.c
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+++ b/test/self-copy-overlap.c
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+/*
+ * Copyright 2008 Chris Wilson
+ *
+ * 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. Chris Wilson 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.
+ *
+ * Author: Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+/* Question: are patterns mutable? The answer depends on who you ask... */
+
+#include "cairo-test.h"
+
+/* This test is only interesting if the target has alpha */
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_set_source_rgba (cr, 0, 0, 0, .01);
+    cairo_paint (cr);
+
+    cairo_set_source_surface (cr, cairo_get_target (cr), 1, 1);
+    cairo_paint (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+/*
+ * XFAIL: vector surfaces take snapshot of patterns in contrast to the raster
+ * backends which don't. One solution would be to clone overlapping areas of
+ * dst/source, so patterns were effectively snapshotted across all backends.
+ */
+CAIRO_TEST (self_copy_overlap,
+	    "Tests painting to itself using itself as the source"
+	    "\nBackends treat this case inconsistently---vector backends are creating snapshots.",
+	    "self-copy", /* keywords */
+	    NULL, /* requirements */
+	    200, 200,
+	    NULL, draw)