support for the WebP image format (tdf#114532)

This commit implements a WebP reader and writer for both lossless
and lossy WebP, export dialog options for selecting lossless/lossy
and quality for lossy, and various internal support for the format.

Since writing WebP to e.g. ODT documents would make those images
unreadable by previous versions with no WebP support, support
for that is explicitly disabled in GraphicFilter, to be enabled
somewhen later.

Change-Id: I9b10f6da6faa78a0bb74415a92e9f163c14685f7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/128978
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/filter/source/config/fragments/filters/impress_webp_Export.xcu b/filter/source/config/fragments/filters/impress_webp_Export.xcu
new file mode 100644
index 000000000000..00284a272cba
--- /dev/null
+++ b/filter/source/config/fragments/filters/impress_webp_Export.xcu
@@ -0,0 +1,30 @@
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
+-->
+    <node oor:name="impress_webp_Export" oor:op="replace">
+        <prop oor:name="Flags"><value>EXPORT ALIEN SUPPORTSSELECTION</value></prop>
+        <prop oor:name="UIComponent"><value>com.sun.star.svtools.SvFilterOptionsDialog</value></prop>
+        <prop oor:name="FilterService"/>
+        <prop oor:name="UserData"><value></value></prop>
+        <prop oor:name="UIName">
+            <value xml:lang="en-US">WEBP - WebP Image</value>
+        </prop>
+        <prop oor:name="FileFormatVersion"><value>0</value></prop>
+        <prop oor:name="Type"><value>webp_WebP</value></prop>
+        <prop oor:name="TemplateName"/>
+        <prop oor:name="DocumentService"><value>com.sun.star.presentation.PresentationDocument</value></prop>
+    </node>