Linux Manuals

XQueryColor, XQueryColors, XLookupColor, XParseColor – obtain color values Syntaxint 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);Argumentscolormap Specifies the colormap. color_name Specifies the color name string (for example,…

XQueryColor, XQueryColors, XLookupColor, XParseColor – obtain color values Syntaxint 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);Argumentscolormap Specifies the colormap. color_name Specifies the color name string (for example,…

XQueryBestSize, XQueryBestTile, XQueryBestStipple – determine efficient sizes SyntaxStatus XQueryBestSize(Display *display, int class, Drawable which_screen, unsigned int width, unsigned int height, unsigned int *width_return, unsigned int *height_return); Status XQueryBestTile(Display *display, Drawable which_screen, unsigned int width, unsigned int height, unsigned int *width_return, unsigned int *height_return); Status XQueryBestStipple(Display *display, Drawable which_screen, unsigned int width, unsigned int height, unsigned…

XQueryBestSize, XQueryBestTile, XQueryBestStipple – determine efficient sizes SyntaxStatus XQueryBestSize(Display *display, int class, Drawable which_screen, unsigned int width, unsigned int height, unsigned int *width_return, unsigned int *height_return); Status XQueryBestTile(Display *display, Drawable which_screen, unsigned int width, unsigned int height, unsigned int *width_return, unsigned int *height_return); Status XQueryBestStipple(Display *display, Drawable which_screen, unsigned int width, unsigned int height, unsigned…

XQueryBestSize, XQueryBestTile, XQueryBestStipple – determine efficient sizes SyntaxStatus XQueryBestSize(Display *display, int class, Drawable which_screen, unsigned int width, unsigned int height, unsigned int *width_return, unsigned int *height_return); Status XQueryBestTile(Display *display, Drawable which_screen, unsigned int width, unsigned int height, unsigned int *width_return, unsigned int *height_return); Status XQueryBestStipple(Display *display, Drawable which_screen, unsigned int width, unsigned int height, unsigned…

XRecolorCursor, XFreeCursor, XQueryBestCursor – manipulate cursors Syntaxint XRecolorCursor(Display *display, Cursor cursor, XColor *foreground_color, XColor *background_color); int XFreeCursor(Display *display, Cursor cursor); Status XQueryBestCursor(Display *display, Drawable d, unsigned int width, unsigned int height, unsigned int *width_return, unsigned int *height_return);Argumentsbackground_color Specifies the RGB values for the background of the source. cursor Specifies the cursor. d Specifies the drawable,…

XInitImage, XCreateImage, XGetPixel, XPutPixel, XSubImage, XAddPixel, XDestroyImage – image utilities SyntaxStatus XInitImage(XImage *image); 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); unsigned long XGetPixel(XImage *ximage, int x, int y); int XPutPixel(XImage *ximage, int x, int y, unsigned long pixel);…

XPutImage, XGetImage, XGetSubImage – transfer images Syntaxint 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, int…

XPutBackEvent – put events back on the queue SyntaxXPutBackEvent(Display *display, XEvent *event);Argumentsdisplay Specifies the connection to the X server. event Specifies the event.DescriptionThe 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 read an event and then…

XPropertyEvent – PropertyNotify event structure StructuresThe 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 this…

XAddConnectionWatch, XRemoveConnectionWatch, XProcessInternalConnection, XInternalConnectionNumbers – handle Xlib internal connections Syntaxtypedef 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);Argumentsclient_data Specifies the additional client data. count_return Returns the…

XPolygonRegion, XClipBox – generate regions SyntaxRegion XPolygonRegion(XPoint points[], int n, int fill_rule); int XClipBox(Region r, XRectangle *rect_return);Argumentsfill_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 region. rect_return Returns…

XEmptyRegion, XEqualRegion, XPointInRegion, XRectInRegion – determine if regions are empty or equal SyntaxBool 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);Argumentsr Specifies the region. r1 r2 Specify the two regions. width height Specify the width and…

XDrawPoint, XDrawPoints, XPoint – draw points and points structure Syntaxint 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);Argumentsd Specifies the drawable. display Specifies the connection to the X server. gc Specifies the GC. mode Specifies the coordinate mode. You can…

ImageByteOrder, BitmapBitOrder, BitmapPad, BitmapUnit, DisplayHeight, DisplayHeightMM, DisplayWidth, DisplayWidthMM, XListPixmapFormats, XPixmapFormatValues – image format functions and macros SyntaxXPixmapFormatValues *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);Argumentsdisplay Specifies the…

XFlush, XSync, XEventsQueued, XPending – handle output buffer or event queue Syntaxint XFlush(Display *display); int XSync(Display *display, Bool discard); int XEventsQueued(Display *display, int mode); int XPending(Display *display);Argumentsdiscard 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 the mode. You…

XIfEvent, XCheckIfEvent, XPeekIfEvent – check the event queue with a predicate procedure Syntaxint 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);Argumentsarg Specifies the user-supplied argument that will be passed to the predicate procedure. display Specifies the connection…

XNextEvent, XPeekEvent, XWindowEvent, XCheckWindowEvent, XMaskEvent, XCheckMaskEvent, XCheckTypedEvent, XCheckTypedWindowEvent – select events by type Syntaxint 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 *event_return);…

XParseGeometry, XWMGeometry – parse window geometry Syntaxint 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);Argumentsposition default_position Specify the geometry specifications. display Specifies the connection to the X…

XQueryColor, XQueryColors, XLookupColor, XParseColor – obtain color values Syntaxint 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);Argumentscolormap Specifies the colormap. color_name Specifies the color name string (for example,…