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

1 files changed, 151 insertions, 0 deletions

diff --git a/vcl/qt5/Qt5OpenGLContext.cxx b/vcl/qt5/Qt5OpenGLContext.cxx
new file mode 100644
index 000000000000..6f095e7cc857
--- /dev/null
+++ b/vcl/qt5/Qt5OpenGLContext.cxx
@@ -0,0 +1,151 @@
+/* -*- 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 .
+ */
+
+#include <Qt5OpenGLContext.hxx>
+
+#include <vcl/sysdata.hxx>
+#include <opengl/zone.hxx>
+#include <sal/log.hxx>
+
+#include <window.h>
+
+#include <Qt5Object.hxx>
+
+#include <QtGui/QOpenGLContext>
+#include <QtGui/QWindow>
+
+bool Qt5OpenGLContext::g_bAnyCurrent = false;
+
+void Qt5OpenGLContext::swapBuffers()
+{
+    OpenGLZone aZone;
+
+    if (m_pContext && m_pWindow && m_pWindow->isExposed())
+    {
+        m_pContext->swapBuffers(m_pWindow);
+    }
+
+    BuffersSwapped();
+}
+
+void Qt5OpenGLContext::resetCurrent()
+{
+    clearCurrent();
+
+    OpenGLZone aZone;
+
+    if (m_pContext)
+    {
+        m_pContext->doneCurrent();
+        g_bAnyCurrent = false;
+    }
+}
+
+bool Qt5OpenGLContext::isCurrent()
+{
+    OpenGLZone aZone;
+    return g_bAnyCurrent && (QOpenGLContext::currentContext() == m_pContext);
+}
+
+bool Qt5OpenGLContext::isAnyCurrent()
+{
+    OpenGLZone aZone;
+    return g_bAnyCurrent && (QOpenGLContext::currentContext() != nullptr);
+}
+
+bool Qt5OpenGLContext::ImplInit()
+{
+    if (!m_pWindow)
+    {
+        SAL_WARN("vcl.opengl.qt5", "failed to create window");
+        return false;
+    }
+
+    m_pWindow->setSurfaceType(QSurface::OpenGLSurface);
+    m_pWindow->create();
+
+    m_pContext = new QOpenGLContext(m_pWindow);
+    if (!m_pContext->create())
+    {
+        SAL_WARN("vcl.opengl.qt5", "failed to create context");
+        return false;
+    }
+
+    m_pContext->makeCurrent(m_pWindow);
+    g_bAnyCurrent = true;
+
+    bool bRet = InitGL();
+    InitGLDebugging();
+
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+
+    registerAsCurrent();
+
+    return bRet;
+}
+
+void Qt5OpenGLContext::makeCurrent()
+{
+    if (isCurrent())
+        return;
+
+    OpenGLZone aZone;
+
+    clearCurrent();
+
+    if (m_pContext && m_pWindow)
+    {
+        m_pContext->makeCurrent(m_pWindow);
+        g_bAnyCurrent = true;
+    }
+
+    registerAsCurrent();
+}
+
+void Qt5OpenGLContext::destroyCurrentContext()
+{
+    OpenGLZone aZone;
+
+    if (m_pContext)
+    {
+        m_pContext->doneCurrent();
+        g_bAnyCurrent = false;
+    }
+
+    if (glGetError() != GL_NO_ERROR)
+    {
+        SAL_WARN("vcl.opengl.qt5", "glError: " << glGetError());
+    }
+}
+
+void Qt5OpenGLContext::initWindow()
+{
+    if (!m_pChildWindow)
+    {
+        SystemWindowData winData = generateWinData(mpWindow, mbRequestLegacyContext);
+        m_pChildWindow = VclPtr<SystemChildWindow>::Create(mpWindow, 0, &winData, false);
+    }
+
+    if (m_pChildWindow)
+    {
+        InitChildWindow(m_pChildWindow.get());
+    }
+
+    m_pWindow = static_cast<Qt5Object*>(m_pChildWindow->ImplGetWindowImpl()->mpSysObj)->m_pQWindow;
+}