qqnxwindowgrabber_p.h

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// Copyright (C) 2016 Research In Motion
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QQnxWindowGrabber_H
#define QQnxWindowGrabber_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.
//
 
#define EGL_EGLEXT_PROTOTYPES
#define GL_GLEXT_PROTOTYPES
#include <EGL/egl.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <EGL/eglext.h>
#include <QAbstractNativeEventFilter>
#include <QObject>
#include <QSize>
#include <QTimer>
 
#include <memory>
 
#include <screen/screen.h>
 
QT_BEGIN_NAMESPACE
 
class QRhi;
class QQnxWindowGrabberImage;
 
class QQnxWindowGrabber : public QObject, public QAbstractNativeEventFilter
{
    Q_OBJECT
 
public:
    struct BufferView
    {
        int width = -1;
        int height = -1;
        int stride = -1;
 
        unsigned char *data = nullptr;
 
        static constexpr int pixelSize = 4; // BGRX8888;
    };
 
    explicit QQnxWindowGrabber(QObject *parent = 0);
    ~QQnxWindowGrabber();
 
    void setFrameRate(int frameRate);
 
    void setWindowId(const QByteArray &windowId);
 
    void setRhi(QRhi *rhi);
 
    void start();
    void stop();
 
    void pause();
    void resume();
 
    void forceUpdate();
 
    bool nativeEventFilter(const QByteArray &eventType, void *message, qintptr *result) override;
 
    bool handleScreenEvent(screen_event_t event);
 
    QByteArray windowGroupId() const;
 
    bool isEglImageSupported() const;
 
    int getNextTextureId();
    BufferView getNextBuffer();
 
Q_SIGNALS:
    void updateScene(const QSize &size);
 
private Q_SLOTS:
    void triggerUpdate();
 
private:
    bool selectBuffer();
    void resetBuffers();
    void checkForEglImageExtension();
 
    QTimer m_timer;
 
    QByteArray m_windowId;
 
    screen_window_t m_windowParent;
    screen_window_t m_window;
    screen_context_t m_screenContext;
 
    std::unique_ptr<QQnxWindowGrabberImage> m_frontBuffer;
    std::unique_ptr<QQnxWindowGrabberImage> m_backBuffer;
 
    QSize m_size;
 
    QRhi *m_rhi;
 
    bool m_active;
    bool m_eglImageSupported;
    bool m_startPending;
};
 
QT_END_NAMESPACE
 
#endif