From 7172b5112e5dbf0cb63dec68d2f916a323748aa1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tor=20Arne=20Vestb=C3=B8?= <tor.arne.vestbo@qt.io>
Date: Tue, 31 Mar 2020 15:27:11 +0200
Subject: Move QtPlatformCompositorSupport into QtOpenGL

Task-number: QTBUG-83255
Change-Id: Id9ea654db8efb00b487d53aea03d7f23a7ab1a54
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
---
 src/opengl/qopenglcompositor_p.h | 124 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 src/opengl/qopenglcompositor_p.h

(limited to 'src/opengl/qopenglcompositor_p.h')

diff --git a/src/opengl/qopenglcompositor_p.h b/src/opengl/qopenglcompositor_p.h
new file mode 100644
index 00000000000..d0d1c9303dc
--- /dev/null
+++ b/src/opengl/qopenglcompositor_p.h
@@ -0,0 +1,124 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QOPENGLCOMPOSITOR_H
+#define QOPENGLCOMPOSITOR_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 <QtOpenGL/qtopenglglobal.h>
+
+#include <QtCore/QTimer>
+#include <QtOpenGL/QOpenGLTextureBlitter>
+#include <QtGui/QMatrix4x4>
+
+QT_BEGIN_NAMESPACE
+
+class QOpenGLContext;
+class QOpenGLFramebufferObject;
+class QWindow;
+class QPlatformTextureList;
+
+class QOpenGLCompositorWindow
+{
+public:
+    virtual ~QOpenGLCompositorWindow() { }
+    virtual QWindow *sourceWindow() const = 0;
+    virtual const QPlatformTextureList *textures() const = 0;
+    virtual void beginCompositing() { }
+    virtual void endCompositing() { }
+};
+
+class Q_OPENGL_EXPORT QOpenGLCompositor : public QObject
+{
+    Q_OBJECT
+
+public:
+    static QOpenGLCompositor *instance();
+    static void destroy();
+
+    void setTarget(QOpenGLContext *context, QWindow *window, const QRect &nativeTargetGeometry);
+    void setRotation(int degrees);
+    QOpenGLContext *context() const { return m_context; }
+    QWindow *targetWindow() const { return m_targetWindow; }
+
+    void update();
+    QImage grab();
+
+    QList<QOpenGLCompositorWindow *> windows() const { return m_windows; }
+    void addWindow(QOpenGLCompositorWindow *window);
+    void removeWindow(QOpenGLCompositorWindow *window);
+    void moveToTop(QOpenGLCompositorWindow *window);
+    void changeWindowIndex(QOpenGLCompositorWindow *window, int newIdx);
+
+signals:
+    void topWindowChanged(QOpenGLCompositorWindow *window);
+
+private slots:
+    void handleRenderAllRequest();
+
+private:
+    QOpenGLCompositor();
+    ~QOpenGLCompositor();
+
+    void renderAll(QOpenGLFramebufferObject *fbo);
+    void render(QOpenGLCompositorWindow *window);
+
+    QOpenGLContext *m_context;
+    QWindow *m_targetWindow;
+    QRect m_nativeTargetGeometry;
+    int m_rotation;
+    QMatrix4x4 m_rotationMatrix;
+    QTimer m_updateTimer;
+    QOpenGLTextureBlitter m_blitter;
+    QList<QOpenGLCompositorWindow *> m_windows;
+};
+
+QT_END_NAMESPACE
+
+#endif // QOPENGLCOMPOSITOR_H
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