src/Main/libX11.hpp

#ifndef libX11_hpp
#define libX11_hpp

#define Bool int
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/extensions/XShm.h>

struct LibX11exports
{
    LibX11exports(void *libX11, void *libXext);

    Display *(*XOpenDisplay)(char *display_name);
    Status (*XGetWindowAttributes)(Display *display, Window w, XWindowAttributes *window_attributes_return);
    Screen *(*XDefaultScreenOfDisplay)(Display *display);
    int (*XWidthOfScreen)(Screen *screen);
    int (*XHeightOfScreen)(Screen *screen);
    int (*XPlanesOfScreen)(Screen *screen);
    GC (*XDefaultGC)(Display *display, int screen_number);
    int (*XDefaultDepth)(Display *display, int screen_number);
    Status (*XMatchVisualInfo)(Display *display, int screen, int depth, int screen_class, XVisualInfo *vinfo_return);
    Visual *(*XDefaultVisual)(Display *display, int screen_number);
    int (*(*XSetErrorHandler)(int (*handler)(Display*, XErrorEvent*)))(Display*, XErrorEvent*);
    int (*XSync)(Display *display, Bool discard);
    XImage *(*XCreateImage)(Display *display, Visual *visual, unsigned int depth, int format, int offset, char *data, unsigned int width, unsigned int height, int bitmap_pad, int bytes_per_line);
    int (*XCloseDisplay)(Display *display);
    int (*XPutImage)(Display *display, Drawable d, GC gc, XImage *image, int src_x, int src_y, int dest_x, int dest_y, unsigned int width, unsigned int height);

    Bool (*XShmQueryExtension)(Display *display);
    XImage *(*XShmCreateImage)(Display *display, Visual *visual, unsigned int depth, int format, char *data, XShmSegmentInfo *shminfo, unsigned int width, unsigned int height);
    Bool (*XShmAttach)(Display *display, XShmSegmentInfo *shminfo);
    Bool (*XShmDetach)(Display *display, XShmSegmentInfo *shminfo);
    int (*XShmPutImage)(Display *display, Drawable d, GC gc, XImage *image, int src_x, int src_y, int dest_x, int dest_y, unsigned int width, unsigned int height, bool send_event);
};

#undef Bool

class LibX11
{
public:
	operator bool()
	{
		return loadExports();
	}

    LibX11exports *operator->();

private:
	LibX11exports *loadExports();
};

extern LibX11 libX11;

#endif   // libX11_hpp