hyperion.ng/include/grabber/X11Grabber.h

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#pragma once
#include <QAbstractEventDispatcher>
#include <QAbstractNativeEventFilter>
#include <QCoreApplication>
#include <QObject>
// Hyperion-utils includes
#include <utils/ColorRgb.h>
#include <hyperion/Grabber.h>
// X11 includes
#include <X11/Xlib.h>
#include <X11/extensions/Xrandr.h>
#include <X11/extensions/Xrender.h>
#include <X11/extensions/XShm.h>
#include <sys/ipc.h>
#include <sys/shm.h>
class X11Grabber : public Grabber , public QAbstractNativeEventFilter
{
public:
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X11Grabber(int cropLeft, int cropRight, int cropTop, int cropBottom, int pixelDecimation);
~X11Grabber() override;
bool Setup();
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///
/// Captures a single snapshot of the display and writes the data to the given image. The
/// provided image should have the same dimensions as the configured values (_width and
/// _height)
///
/// @param[out] image The snapped screenshot (should be initialized with correct width and
/// height)
///
virtual int grabFrame(Image<ColorRgb> & image, bool forceUpdate=false);
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///
/// update dimension according current screen
int updateScreenDimensions(bool force=false);
virtual void setVideoMode(VideoMode mode);
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///
/// @brief Apply new width/height values, overwrite Grabber.h implementation as X11 doesn't use width/height, just pixelDecimation to calc dimensions
///
virtual bool setWidthHeight(int width, int height) { return true; };
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///
/// @brief Apply new pixelDecimation
///
virtual void setPixelDecimation(int pixelDecimation);
///
/// Set the crop values
/// @param cropLeft Left pixel crop
/// @param cropRight Right pixel crop
/// @param cropTop Top pixel crop
/// @param cropBottom Bottom pixel crop
///
virtual void setCropping(unsigned cropLeft, unsigned cropRight, unsigned cropTop, unsigned cropBottom);
protected:
bool nativeEventFilter(const QByteArray & eventType, void * message, long int * result) override;
private:
bool _XShmAvailable, _XShmPixmapAvailable, _XRenderAvailable, _XRandRAvailable;
XImage* _xImage;
XShmSegmentInfo _shminfo;
/// Reference to the X11 display (nullptr if not opened)
Display* _x11Display;
Window _window;
XWindowAttributes _windowAttr;
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Pixmap _pixmap;
XRenderPictFormat* _srcFormat;
XRenderPictFormat* _dstFormat;
XRenderPictureAttributes _pictAttr;
Picture _srcPicture;
Picture _dstPicture;
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int _XRandREventBase;
XTransform _transform;
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int _pixelDecimation;
unsigned _screenWidth;
unsigned _screenHeight;
unsigned _src_x;
unsigned _src_y;
Image<ColorRgb> _image;
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void freeResources();
void setupResources();
};