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#include "qeglfshooks.h"
#include <EGL/eglvivante.h>
#include <QDebug>

QT_BEGIN_NAMESPACE

class QEglFSImx6Hooks : public QEglFSHooks
{
public:
    QEglFSImx6Hooks();
    virtual QSize screenSize() const;
    virtual EGLNativeWindowType createNativeWindow(QPlatformWindow *window, const QSize &size, const QSurfaceFormat &format);
    virtual void destroyNativeWindow(EGLNativeWindowType window);
    virtual EGLNativeDisplayType platformDisplay() const;

private:
    QSize mScreenSize;
    EGLNativeDisplayType mNativeDisplay;
};


QEglFSImx6Hooks::QEglFSImx6Hooks()
{
    int width, height;

    bool multiBufferNotEnabledYet = qEnvironmentVariableIsEmpty("FB_MULTI_BUFFER");
    bool multiBuffer = qEnvironmentVariableIsEmpty("QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER");
    if (multiBufferNotEnabledYet && multiBuffer) {
        qWarning() << "QEglFSImx6Hooks will set environment variable FB_MULTI_BUFFER=2 to enable double buffering and vsync.\n"
                   << "If this is not desired, you can override this via: export QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1";
        qputenv("FB_MULTI_BUFFER", "2");
    }

    mNativeDisplay = fbGetDisplayByIndex(framebufferIndex());
    fbGetDisplayGeometry(mNativeDisplay, &width, &height);
    mScreenSize.setHeight(height);
    mScreenSize.setWidth(width);
}

QSize QEglFSImx6Hooks::screenSize() const
{
    return mScreenSize;
}

EGLNativeDisplayType QEglFSImx6Hooks::platformDisplay() const
{
    return mNativeDisplay;
}

EGLNativeWindowType QEglFSImx6Hooks::createNativeWindow(QPlatformWindow *window, const QSize &size, const QSurfaceFormat &format)
{
    Q_UNUSED(window)
    Q_UNUSED(format)

    EGLNativeWindowType eglWindow = fbCreateWindow(mNativeDisplay, 0, 0, size.width(), size.height());
    return eglWindow;
}


void QEglFSImx6Hooks::destroyNativeWindow(EGLNativeWindowType window)
{
    fbDestroyWindow(window);
}

QEglFSImx6Hooks eglFSImx6Hooks;
QEglFSHooks *platformHooks = &eglFSImx6Hooks;

QT_END_NAMESPACE