XPutImage, XGetImage, XGetSubImage – transfer images Syntax 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); XImage *XGetImage(Display *display, Drawable d, int x, int y, unsigned int width, unsigned int height, unsigned long plane_mask, int format); XImage *XGetSubImage(Display *display, Drawable d,…
XPutBackEvent – put events back on the queue Syntax XPutBackEvent(Display *display, XEvent *event); Arguments display Specifies the connection to the X server. event Specifies the event. Description The XPutBackEvent function pushes an event back onto the head of the display’s event queue by copying the event into the queue. This can be useful if you…
XPropertyEvent – PropertyNotify event structure Structures The structure for PropertyNotify events contains: typedef struct { int type; /* PropertyNotify */ unsigned long serial; /* # of last request processed by server */ Bool send_event; /* true if this came from a SendEvent request */ Display *display; /* Display the event was read from */ Window window; Atom atom; Time time; int state; /* PropertyNewValue or PropertyDelete */ } XPropertyEvent; When you receive…
XAddConnectionWatch, XRemoveConnectionWatch, XProcessInternalConnection, XInternalConnectionNumbers – handle Xlib internal connections Syntax typedef void (*XConnectionWatchProc)(Display *display, XPointer client_data, int fd, Bool opening, XPointer *watch_data); Status XAddConnectionWatch(Display *display, XWatchProc procedure, XPointer client_data); Status XRemoveConnectionWatch(Display *display, XWatchProc procedure, XPointer client_data); void XProcessInternalConnection(Display *display, int fd); Status XInternalConnectionNumbers(Display *display, int **fd_return, int *count_return); Arguments client_data Specifies the additional client data….
XPolygonRegion, XClipBox – generate regions Syntax Region XPolygonRegion(XPoint points[], int n, int fill_rule); int XClipBox(Region r, XRectangle *rect_return); Arguments fill_rule Specifies the fill-rule you want to set for the specified GC. You can pass EvenOddRule or WindingRule. n Specifies the number of points in the polygon. points Specifies an array of points. r Specifies the…
XEmptyRegion, XEqualRegion, XPointInRegion, XRectInRegion – determine if regions are empty or equal Syntax Bool XEmptyRegion(Region r); Bool XEqualRegion(Region r1, Region r2); Bool XPointInRegion(Region r, int x, int y); int XRectInRegion(Region r, int x, int y, unsigned int width, unsigned int height); Arguments r Specifies the region. r1 r2 Specify the two regions. width height Specify…
XDrawPoint, XDrawPoints, XPoint – draw points and points structure Syntax int XDrawPoint(Display *display, Drawable d, GC gc, int x, int y); int XDrawPoints(Display *display, Drawable d, GC gc, XPoint *points, int npoints, int mode); Arguments d Specifies the drawable. display Specifies the connection to the X server. gc Specifies the GC. mode Specifies the coordinate…
ImageByteOrder, BitmapBitOrder, BitmapPad, BitmapUnit, DisplayHeight, DisplayHeightMM, DisplayWidth, DisplayWidthMM, XListPixmapFormats, XPixmapFormatValues – image format functions and macros Syntax XPixmapFormatValues *XListPixmapFormats(Display *display, int *count_return); int ImageByteOrder(Display *display); int BitmapBitOrder(Display *display); int BitmapPad(Display *display); int BitmapUnit(Display *display); int DisplayHeight(Display *display, int screen_number); int DisplayHeightMM(Display *display, int screen_number); int DisplayWidth(Display *display, int screen_number); int DisplayWidthMM(Display *display, int screen_number); Arguments…
XFlush, XSync, XEventsQueued, XPending – handle output buffer or event queue Syntax int XFlush(Display *display); int XSync(Display *display, Bool discard); int XEventsQueued(Display *display, int mode); int XPending(Display *display); Arguments discard Specifies a Boolean value that indicates whether XSync discards all events on the event queue. display Specifies the connection to the X server. mode Specifies…
XIfEvent, XCheckIfEvent, XPeekIfEvent – check the event queue with a predicate procedure Syntax int XIfEvent(Display *display, XEvent *event_return, Bool (*predicate)(), XPointer arg); Bool XCheckIfEvent(Display *display, XEvent *event_return, Bool (*predicate)(), XPointer arg); int XPeekIfEvent(Display *display, XEvent *event_return, Bool (*predicate)(), XPointer arg); Arguments arg Specifies the user-supplied argument that will be passed to the predicate procedure. display…
XNextEvent, XPeekEvent, XWindowEvent, XCheckWindowEvent, XMaskEvent, XCheckMaskEvent, XCheckTypedEvent, XCheckTypedWindowEvent – select events by type Syntax int XNextEvent(Display *display, XEvent *event_return); int XPeekEvent(Display *display, XEvent *event_return); int XWindowEvent(Display *display, Window w, long event_mask, XEvent *event_return); Bool XCheckWindowEvent(Display *display, Window w, long event_mask, XEvent *event_return); int XMaskEvent(Display *display, long event_mask, XEvent *event_return); Bool XCheckMaskEvent(Display *display, long event_mask, XEvent…
XParseGeometry, XWMGeometry – parse window geometry Syntax int XParseGeometry(char *parsestring, int *x_return, int *y_return, unsigned int *width_return, unsigned int *height_return); int XWMGeometry(Display *display, int screen, char *user_geom, char *def_geom, unsigned int bwidth, XSizeHints *hints, int *x_return, int *y_return, int *width_return, int *height_return, int *gravity_return); Arguments position default_position Specify the geometry specifications. display Specifies the connection…
XQueryColor, XQueryColors, XLookupColor, XParseColor – obtain color values Syntax int XQueryColor(Display *display, Colormap colormap, XColor *def_in_out); int XQueryColors(Display *display, Colormap colormap, XColor defs_in_out[], int ncolors); Status XLookupColor(Display *display, Colormap colormap, char *color_name, XColor *exact_def_return, XColor *screen_def_return); Status XParseColor(Display *display, Colormap colormap, char *spec, XColor *exact_def_return); Arguments colormap Specifies the colormap. color_name Specifies the color name…
XOpenOM, XCloseOM, XSetOMValues, XGetOMValues, XDisplayOfOM, XLocaleOfOM – open output methods Syntax XOM XOpenOM(Display *display, XrmDatabase db, char *res_name, char *res_class); Status XCloseOM(XOM om); char *XSetOMValues(XOM om); char *XGetOMValues(XOM om); Display *XDisplayOfOM(XOM om); char *XLocaleOfOM(XOM om); Arguments display Specifies the connection to the X server. db Specifies a pointer to the resource database. res_name Specifies the…
XOpenIM, XCloseIM, XSetIMValues, XGetIMValues, XDisplayOfIM, XLocaleOfIM, XRegisterIMInstantiateCallback, XUnregisterIMInstantiateCallback – open, close, and obtain input method information Syntax XIM XOpenIM(Display *display, XrmDatabase db, char *res_name, char *res_class); Status XCloseIM(XIM im); char *XSetIMValues(XIM im, …); char *XGetIMValues(XIM im, …); Display *XDisplayOfIM(XIM im); char *XLocaleOfIM(XIM im); Bool XRegisterIMInstantiateCallback(Display *display, XrmDatabase db, char *res_name, char *res_class, XIDProc callback, XPointer…
XOpenDisplay, XCloseDisplay – connect or disconnect to X server Syntax Display *XOpenDisplay(char *display_name); int XCloseDisplay(Display *display); Arguments display Specifies the connection to the X server. display_name Specifies the hardware display name, which determines the display and communications domain to be used. On a POSIX-conformant system, if the display_name is NULL, it defaults to the value…
XOpenDevice, XCloseDevice – open or close an extension input device Synopsis #include <X11/extensions/XInput.h> XDevice *XOpenDevice( Display *display, XID device_id); XCloseDevice( Display *display, XDevice *device); display Specifies the connection to the X server. device_id Specifies the id of the device to be opened device Specifies the device to be closed Description The XOpenDevice request makes an…
XIntersectRegion, XUnionRegion, XUnionRectWithRegion, XSubtractRegion, XXorRegion, XOffsetRegion, XShrinkRegion – region arithmetic Syntax int XIntersectRegion(Region sra, Region srb, Region dr_return); int XUnionRegion(Region sra, Region srb, Region dr_return); int XUnionRectWithRegion(XRectangle *rectangle, Region src_region, Region dest_region_return); int XSubtractRegion(Region sra, Region srb, Region dr_return); int XXorRegion(Region sra, Region srb, Region dr_return); int XOffsetRegion(Region r, int dx, int dy); int XShrinkRegion(Region…
XCreateOC, XDestroyOC, XSetOCValues, XGetOCValues, XOMOfOC – create output contexts Syntax XOC XCreateOC(XOM om); void XDestroyOC(XOC oc); char * XSetOCValues(XOC oc, …); char * XGetOCValues(XOC oc, …); XOM XOMOfOC(XOC oc); Arguments oc Specifies the output context. om Specifies the output method. … Specifies the variable length argument list to set or get XOC values. Description The…
XNoOp – No Operation Syntax int XNoOp(Display *display); Arguments display Specifies the connection to the X server. Description The XNoOp function sends a NoOperation protocol request to the X server, thereby exercising the connection. See Also Xlib – C Language X Interface