New texture sharing protocol and infrastructure

This adds a higher level protocol on top of the server buffer extension,
providing an easy way for Qt Quick applications to use the shared
textures.

[ChangeLog] Added protocol and Qt Quick image provider for sharing
textures in graphics memory between compositor and multiple clients.

Task-number: QTBUG-73822
Change-Id: Idc41b3479d6ca37be35d9ccd7b89e9994ff17f8f
Reviewed-by: Johan Helsing <johan.helsing@qt.io>

1 files changed, 57 insertions, 0 deletions

diff --git a/src/extensions/qt-texture-sharing-unstable-v1.xml b/src/extensions/qt-texture-sharing-unstable-v1.xml
new file mode 100644
index 000000000..262ae487c
--- /dev/null
+++ b/src/extensions/qt-texture-sharing-unstable-v1.xml
@@ -0,0 +1,57 @@
+<protocol name="qt_texture_sharing_unstable_v1">
+
+    <copyright>
+ Copyright (C) 2019 The Qt Company Ltd.
+ Contact: http://www.qt.io/licensing/
+
+ This file is part of the plugins of the Qt Toolkit.
+
+ $QT_BEGIN_LICENSE:BSD$
+ You may use this file under the terms of the BSD license as follows:
+
+ "Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+   * Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in
+     the documentation and/or other materials provided with the
+     distribution.
+   * Neither the name of The Qt Company Ltd nor the names of its
+     contributors may be used to endorse or promote products derived
+     from this software without specific prior written permission.
+
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+
+ $QT_END_LICENSE$
+    </copyright>
+
+    <interface name="zqt_texture_sharing_v1" version="1">
+        <request name="request_image">
+            <arg name="key" type="string"/>
+        </request>
+        <request name="abandon_image">
+            <arg name="key" type="string"/>
+        </request>
+        <event name="image_failed">
+            <arg name="key" type="string"/>
+            <arg name="error_message" type="string"/>
+        </event>
+        <event name="provide_buffer">
+            <arg name="buffer" type="object" interface="qt_server_buffer"/>
+            <arg name="key" type="string"/>
+        </event>
+    </interface>
+</protocol>