X11Grabber.h

#pragma once

#include <QObject>

// Hyperion-utils includes
#include <utils/ColorRgb.h>
#include <hyperion/Grabber.h>

// X11 includes
#include <X11/Xlib.h>
#include <X11/extensions/Xrender.h>
#include <X11/extensions/XShm.h>
#include <sys/ipc.h>
#include <sys/shm.h>

class X11Grabber : public Grabber
{
public:

    X11Grabber(int cropLeft, int cropRight, int cropTop, int cropBottom, int pixelDecimation);

    virtual ~X11Grabber();

    bool Setup();

    virtual int grabFrame(Image<ColorRgb> & image, bool forceUpdate=false);

    int updateScreenDimensions(bool force=false);

    virtual void setVideoMode(VideoMode mode);

    virtual bool setWidthHeight(int width, int height) { return true; };

    virtual void setPixelDecimation(int pixelDecimation);

    virtual void setCropping(unsigned cropLeft, unsigned cropRight, unsigned cropTop, unsigned cropBottom);

private:
    bool _XShmAvailable, _XShmPixmapAvailable, _XRenderAvailable;

    XImage* _xImage;
    XShmSegmentInfo _shminfo;

    Display* _x11Display;
    Window _window;
    XWindowAttributes _windowAttr;

    Pixmap _pixmap;
    XRenderPictFormat* _srcFormat;
    XRenderPictFormat* _dstFormat;
    XRenderPictureAttributes _pictAttr;
    Picture _srcPicture;
    Picture _dstPicture;

    XTransform _transform;
    int _pixelDecimation;

    unsigned _screenWidth;
    unsigned _screenHeight;
    unsigned _src_x;
    unsigned _src_y;

    Image<ColorRgb> _image;

    void freeResources();
    void setupResources();
};