Backport texture sharing for NVIDIA

This commit backports the Vulkan server buffer and texture sharing code
from Qt 5.14 to Qt 5.12 as an opt-in feature. To enable, configure with
"-feature-wayland-client-texture-sharing-experimental
-feature-wayland-compositor-texture-sharing-experimental"

Contains code from the following commits:

Add server buffer integration based on Vulkan
(commit df3a1761af2f20d59ae09a7adaa2f5b959047687)

Compressed texture support for vulkan server buffers
(commit f710489a341713c675cfd91d22ccd7bf8f29f4dd)

Implement server-side toOpenGlTexture for Vulkan
(commit 19361e7259f04b08925b1e8e99faf9460770ee7b)

New texture sharing protocol and infrastructure
(commit 80001cbf0451f4ba2a971fb20b80dc8e25ac604d)

Change-Id: I6c36ef7fddcd4db39e80d03a822d89f15eae3434
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Johan Helsing <johan.helsing@qt.io>

2 files changed, 121 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>
diff --git a/src/extensions/qt-vulkan-server-buffer-unstable-v1.xml b/src/extensions/qt-vulkan-server-buffer-unstable-v1.xml
new file mode 100644
index 000000000..211d0a7c7
--- /dev/null
+++ b/src/extensions/qt-vulkan-server-buffer-unstable-v1.xml
@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="qt_vulkan_server_buffer_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_vulkan_server_buffer_v1" version="1">
+    <description summary="Internal protocol for buffer sharing using Vulkan external memory">
+      This protocol is used internally by Qt for implementing the
+      qt_server_buffer extension on hardware that supports Vulkan external memory .
+
+      This protocol is not part of the Qt API.  It exists purely as an
+      implementation detail and may change from version to
+      version without notice, or even be removed.
+    </description>
+    <event name="server_buffer_created">
+      <description summary="vulkan buffer information">
+        Informs the client about a newly created server buffer.
+        The "fd" argument is a POSIX file descriptor representing the
+        underlying resources of a Vulkan device memory object as defined
+        in the GL_EXT_memory_object_fd extension.
+      </description>
+      <arg name="id" type="new_id" interface="qt_server_buffer"/>
+      <arg name="fd" type="fd" summary="GL_EXT_memory_object_fd"/>
+      <arg name="width" type="uint"/>
+      <arg name="height" type="uint"/>
+      <arg name="memory_size" type="uint" summary="size in bytes"/>
+      <arg name="format" type="uint" summary="GL internal format"/>
+    </event>
+  </interface>
+</protocol>