Move versioned OpenGL functions from QtGui to QtOpenGL

The context—which lives in QtGui—now knows nothing about versioned functions.

This changes the public API for getting version functions for a context.

[ChangeLog][QtGui][OpenGL] QOpenGLContext::versionFunctions() has been removed.
QOpenGLVersionFunctionsFactory::get() from the QtOpenGL module should be used
instead.

Previously one would call

    context->versionFunctions<QOpenGLFunctions_4_0_Core>();

Which now becomes

    QOpenGLVersionFunctionsFactory::get<QOpenGLFunctions_4_0_Core>(context);

The rest of the API should be identical.

Since glgen no longer compiles, and the links to its input (gl.spec and gl.tm)
are dead, I've edited the previously generated files manually. If glgen is
fixed, it should be quite easy to make it generate the new way.

Task-number: QTBUG-74409
Change-Id: I800527e0af16a79005b276eeb74417770193c62f
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

1 files changed, 87 insertions, 0 deletions

diff --git a/src/opengl/qopenglversionfunctions_p.h b/src/opengl/qopenglversionfunctions_p.h
new file mode 100644
index 0000000000..1458edf322
--- /dev/null
+++ b/src/opengl/qopenglversionfunctions_p.h
@@ -0,0 +1,87 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Klaralvdalens Datakonsult AB (KDAB)
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+**
+** This file was generated by glgen version 0.1
+** Command line was: glgen
+**
+** glgen is Copyright (C) 2012 Klaralvdalens Datakonsult AB (KDAB)
+**
+** This is an auto-generated file.
+** Do not edit! All changes made to it will be lost.
+**
+****************************************************************************/
+
+#ifndef QOPENGLVERSIONFUNCTION_H
+#define QOPENGLVERSIONFUNCTION_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qopenglversionfunctions.h"
+
+#include <QtOpenGL/qtopenglglobal.h>
+#include <QtOpenGL/QOpenGLVersionProfile>
+#include <QtCore/QSet>
+
+QT_BEGIN_NAMESPACE
+
+class QAbstractOpenGLFunctions;
+
+class QOpenGLContextVersionData {
+public:
+    QHash<QOpenGLVersionProfile, QAbstractOpenGLFunctions *> functions;
+    QOpenGLVersionFunctionsStorage functionsStorage;
+    QSet<QAbstractOpenGLFunctions *> externalFunctions;
+    // TODO: who calls delete?
+    ~QOpenGLContextVersionData();
+    static QOpenGLContextVersionData *forContext(QOpenGLContext *context);
+private:
+    static QMap<QOpenGLContext *, QOpenGLContextVersionData *> contextData;
+};
+
+QT_END_NAMESPACE
+
+#endif