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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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>
#include <QtCore/private/qglobal_p.h>
QT_BEGIN_NAMESPACE
class QOpenGLContext;
class QOpenGLFramebufferObject;
class QWindow;
class QPlatformTextureList;
class QOpenGLCompositorBackingStore;
class QOpenGLCompositorWindow
{
public:
virtual ~QOpenGLCompositorWindow() { }
virtual QWindow *sourceWindow() const = 0;
virtual const QPlatformTextureList *textures() const = 0;
virtual void beginCompositing() { }
virtual void endCompositing() { }
virtual void setBackingStore(QOpenGLCompositorBackingStore *backingStore) = 0;
virtual QOpenGLCompositorBackingStore *backingStore() const = 0;
};
class Q_OPENGL_EXPORT QOpenGLCompositor : public QObject
{
Q_OBJECT
public:
enum GrabOrientation {
Flipped,
NotFlipped,
};
static QOpenGLCompositor *instance();
static void destroy();
void setTargetWindow(QWindow *window, const QRect &nativeTargetGeometry);
void setTargetContext(QOpenGLContext *context);
void setRotation(int degrees);
QOpenGLContext *context() const { return m_context; }
QWindow *targetWindow() const { return m_targetWindow; }
QRect nativeTargetGeometry() const { return m_nativeTargetGeometry; }
void update();
QImage grab();
bool grabToFrameBufferObject(QOpenGLFramebufferObject *fbo, GrabOrientation orientation = Flipped);
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,
QOpenGLTextureBlitter::Origin origin = QOpenGLTextureBlitter::OriginTopLeft);
void render(QOpenGLCompositorWindow *window,
QOpenGLTextureBlitter::Origin origin = QOpenGLTextureBlitter::OriginTopLeft);
void ensureCorrectZOrder();
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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