Provide backwards compatibilty with old pixman

The goal is to allow compilation against older pixman to ease regression
testing.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 45 insertions, 0 deletions

diff --git a/src/cairo-pixman-private.h b/src/cairo-pixman-private.h
new file mode 100644
index 000000000..13ec82e2f
--- /dev/null
+++ b/src/cairo-pixman-private.h
@@ -0,0 +1,45 @@
+/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright ©2013 Intel Corporation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ * The Original Code is the cairo graphics library.
+ *
+ * The Initial Developer of the Original Code is University of Southern
+ * California.
+ *
+ * Contributor(s):
+ *	Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include <pixman.h>
+
+#if PIXMAN_VERSION < PIXMAN_VERSION_ENCODE(0,22,0)
+#define pixman_image_composite32 pixman_image_composite
+#define pixman_image_get_component_alpha(i) 0
+#define pixman_image_set_component_alpha(i, x) do { } while (0)
+#endif
+