tdf#121247, tdf#121266 KDE5: Add basic support for OpenGL

Change-Id: Id3a5879f661a6fa51b9f9dc40af73687a8f624df
Reviewed-on: https://gerrit.libreoffice.org/65310
Reviewed-by: Katarina Behrens <Katarina.Behrens@cib.de>
Tested-by: Jenkins
(cherry picked from commit 56b19f9a814ae5a39ed760ee542d715493cd0bf3)
Reviewed-on: https://gerrit.libreoffice.org/65393
Reviewed-by: Aleksei Nikiforov <darktemplar@basealt.ru>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

2 files changed, 56 insertions, 2 deletions

diff --git a/vcl/inc/qt5/Qt5Object.hxx b/vcl/inc/qt5/Qt5Object.hxx
index 294f4da4d9db..640c83753deb 100644
--- a/vcl/inc/qt5/Qt5Object.hxx
+++ b/vcl/inc/qt5/Qt5Object.hxx
@@ -24,14 +24,18 @@
 
 #include <QtGui/QRegion>
 
-class QWidget;
 class Qt5Frame;
+class QWidget;
+class QWindow;
 
 class Qt5Object : public SalObject
 {
+    friend class Qt5OpenGLContext;
+
     SystemEnvData m_aSystemData;
     Qt5Frame* m_pParent;
-    QWidget* m_pQWidget;
+    QWidget* m_pQWidget; // main widget, container
+    QWindow* m_pQWindow; // contained window, used for opengl rendering
     QRegion m_pRegion;
 
 public:
diff --git a/vcl/inc/qt5/Qt5OpenGLContext.hxx b/vcl/inc/qt5/Qt5OpenGLContext.hxx
new file mode 100644
index 000000000000..778df689ba65
--- /dev/null
+++ b/vcl/inc/qt5/Qt5OpenGLContext.hxx
@@ -0,0 +1,50 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * 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 .
+ */
+
+#pragma once
+
+#include <vcl/opengl/OpenGLContext.hxx>
+
+class QWindow;
+class QOpenGLContext;
+
+class Qt5OpenGLContext : public OpenGLContext
+{
+public:
+    virtual void initWindow() override;
+
+private:
+    virtual const GLWindow& getOpenGLWindow() const override { return m_aGLWin; }
+    virtual GLWindow& getModifiableOpenGLWindow() override { return m_aGLWin; }
+    virtual bool ImplInit() override;
+
+    virtual void makeCurrent() override;
+    virtual void destroyCurrentContext() override;
+    virtual bool isCurrent() override;
+    virtual bool isAnyCurrent() override;
+    virtual void resetCurrent() override;
+    virtual void swapBuffers() override;
+
+    static bool g_bAnyCurrent;
+
+    GLWindow m_aGLWin;
+
+    QWindow* m_pWindow;
+    QOpenGLContext* m_pContext;
+};