Linux Manuals session 3

XAllocColor, XAllocNamedColor, XAllocColorCells, XAllocColorPlanes, XFreeColors – allocate and free colors SyntaxStatus XAllocColor(Display *display, Colormap colormap, XColor *screen_in_out); Status XAllocNamedColor(Display *display, Colormap colormap, char *color_name, XColor *screen_def_return, XColor *exact_def_return); Status XAllocColorCells(Display *display, Colormap colormap, Bool contig, unsigned long plane_masks_return[], unsigned int nplanes, unsigned long pixels_return[], unsigned int npixels); Status XAllocColorPlanes(Display *display, Colormap colormap, Bool contig, unsigned…

XCreateColormap, XCopyColormapAndFree, XFreeColormap, XColor – create, copy, or destroy colormaps and color structure SyntaxColormap XCreateColormap(Display *display, Window w, Visual *visual, int alloc); Colormap XCopyColormapAndFree(Display *display, Colormap colormap); int XFreeColormap(Display *display, Colormap colormap);Argumentsalloc Specifies the colormap entries to be allocated. You can pass AllocNone or AllocAll. colormap Specifies the colormap that you want to create, copy,…

XDGA – Client library for the XFree86-DGA extension. Synopsis#include <X11/extensions/xf86dga.h> Bool XDGAQueryExtension( Display *dpy, int *eventBase, int *errorBase) Bool XDGAQueryVersion( Display *dpy, int *majorVersion, int *minorVersion) XDGAMode *XDGAQueryModes( Display *dpy, int screen, int *num) XDGADevice *XDGASetMode( Display *dpy, int screen, int mode) Bool XDGAOpenFramebuffer( Display *dpy, int screen) void XDGACloseFramebuffer( Display *dpy, int screen) void…

XFree – free client data Syntaxint XFree(void *data); Argumentsdata Specifies the data that are to be freed.DescriptionThe XFree function is a general-purpose Xlib routine that frees the specified data. You must use it to free any objects that were allocated by Xlib, unless an alternate function is explicitly specified for the object. If data is…

XSetScreenSaver, XForceScreenSaver, XActivateScreenSaver, XResetScreenSaver, XGetScreenSaver – manipulate the screen saver Syntaxint XSetScreenSaver(Display *display, int timeout, int interval, int prefer_blanking, int allow_exposures); int XForceScreenSaver(Display *display, int mode); int XActivateScreenSaver(Display *display); int XResetScreenSaver(Display *display); int XGetScreenSaver(Display *display, int *timeout_return, int *interval_return, int *prefer_blanking_return, int *allow_exposures_return);Argumentsallow_exposures Specifies the screen save control values. You can pass DontAllowExposures, AllowExposures, or…

XFontsOfFontSet, XBaseFontNameListOfFontSet, XLocaleOfFontSet, XContextDependentDrawing, XContextualDrawing, XDirectionalDependentDrawing – obtain fontset information Syntaxint XFontsOfFontSet(XFontSet font_set, XFontStruct ***font_struct_list_return, char ***font_name_list_return); char *XBaseFontNameListOfFontSet(XFontSet font_set); char *XLocaleOfFontSet(XFontSet font_set); Bool XContextDependentDrawing(XFontSet font_set); Bool XContextualDrawing(XFontSet font_set); Bool XDirectionalDependentDrawing(XFontSet font_set);Argumentsfont_set Specifies the font set. font_name_list_return Returns the list of font names. font_struct_list_return Returns the list of font structs.DescriptionThe XFontsOfFontSet function returns a list…

XLoadFont, XQueryFont, XLoadQueryFont, XFreeFont, XGetFontProperty, XUnloadFont, XCharStruct, XFontProp, XChar2b, XFontStruct – load or unload fonts and font metric structures SyntaxFont XLoadFont(Display *display, char *name); XFontStruct *XQueryFont(Display *display, XID font_ID); XFontStruct *XLoadQueryFont(Display *display, char *name); int XFreeFont(Display *display, XFontStruct *font_struct); Bool XGetFontProperty(XFontStruct *font_struct, Atom atom, unsigned long *value_return); int XUnloadFont(Display *display, Font font);Argumentsatom Specifies the atom…

XFontSetExtents – XFontSetExtents structure StructuresThe XFontSetExtents structure contains: typedef struct {         XRectangle max_ink_extent;      /* over all drawable characters */         XRectangle max_logical_extent;  /* over all drawable characters */ } XFontSetExtents; The XRectangle structures used to return font set metrics are the usual Xlib screen-oriented rectangles with x, y giving the upper left corner, and width and height always positive. The max_ink_extent member…

XLoadFont, XQueryFont, XLoadQueryFont, XFreeFont, XGetFontProperty, XUnloadFont, XCharStruct, XFontProp, XChar2b, XFontStruct – load or unload fonts and font metric structures SyntaxFont XLoadFont(Display *display, char *name); XFontStruct *XQueryFont(Display *display, XID font_ID); XFontStruct *XLoadQueryFont(Display *display, char *name); int XFreeFont(Display *display, XFontStruct *font_struct); Bool XGetFontProperty(XFontStruct *font_struct, Atom atom, unsigned long *value_return); int XUnloadFont(Display *display, Font font);Argumentsatom Specifies the atom…

XFocusChangeEvent – FocusIn and FocusOut event structure StructuresThe structure for FocusIn and FocusOut events contains: typedef struct {         int type;       /* FocusIn or FocusOut */         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;  /* window of event */         int mode;       /* NotifyNormal, NotifyGrab, NotifyUngrab */         int detail;…

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…

XSaveContext, XFindContext, XDeleteContext, XUniqueContext – associative look-up routines Syntaxint XSaveContext(Display *display, XID rid, XContext context, XPointer data); int XFindContext(Display *display, XID rid, XContext context, XPointer *data_return); int XDeleteContext(Display *display, XID rid, XContext context); XContext XUniqueContext(void); Argumentscontext Specifies the context type to which the data belongs. data Specifies the data to be associated with the window…

XFilterEvent – filter X events for an input method SyntaxBool XFilterEvent(XEvent *event, Window w);Argumentsevent Specifies the event to filter. w Specifies the window for which the filter is to be applied.DescriptionIf the window argument is None, XFilterEvent applies the filter to the window specified in the XEvent structure. The window argument is provided so that…

XFillRectangle, XFillRectangles, XFillPolygon, XFillArc, XFillArcs – fill rectangles, polygons, or arcs Syntaxint XFillRectangle(Display *display, Drawable d, GC gc, int x, int y, unsigned int width, unsigned int height); int XFillRectangles(Display *display, Drawable d, GC gc, XRectangle *rectangles, int nrectangles); int XFillPolygon(Display *display, Drawable d, GC gc, XPoint *points, int npoints, int shape, int mode); int…

XFillRectangle, XFillRectangles, XFillPolygon, XFillArc, XFillArcs – fill rectangles, polygons, or arcs Syntaxint XFillRectangle(Display *display, Drawable d, GC gc, int x, int y, unsigned int width, unsigned int height); int XFillRectangles(Display *display, Drawable d, GC gc, XRectangle *rectangles, int nrectangles); int XFillPolygon(Display *display, Drawable d, GC gc, XPoint *points, int npoints, int shape, int mode); int…

XFillRectangle, XFillRectangles, XFillPolygon, XFillArc, XFillArcs – fill rectangles, polygons, or arcs Syntaxint XFillRectangle(Display *display, Drawable d, GC gc, int x, int y, unsigned int width, unsigned int height); int XFillRectangles(Display *display, Drawable d, GC gc, XRectangle *rectangles, int nrectangles); int XFillPolygon(Display *display, Drawable d, GC gc, XPoint *points, int npoints, int shape, int mode); int…

XFillRectangle, XFillRectangles, XFillPolygon, XFillArc, XFillArcs – fill rectangles, polygons, or arcs Syntaxint XFillRectangle(Display *display, Drawable d, GC gc, int x, int y, unsigned int width, unsigned int height); int XFillRectangles(Display *display, Drawable d, GC gc, XRectangle *rectangles, int nrectangles); int XFillPolygon(Display *display, Drawable d, GC gc, XPoint *points, int npoints, int shape, int mode); int…

XFillRectangle, XFillRectangles, XFillPolygon, XFillArc, XFillArcs – fill rectangles, polygons, or arcs Syntaxint XFillRectangle(Display *display, Drawable d, GC gc, int x, int y, unsigned int width, unsigned int height); int XFillRectangles(Display *display, Drawable d, GC gc, XRectangle *rectangles, int nrectangles); int XFillPolygon(Display *display, Drawable d, GC gc, XPoint *points, int npoints, int shape, int mode); int…

XSetWMName, XGetWMName, XStoreName, XFetchName – set or read a window’s WM_NAME property Syntaxvoid XSetWMName(Display *display, Window w, XTextProperty *text_prop); Status XGetWMName(Display *display, Window w, XTextProperty *text_prop_return); int XStoreName(Display *display, Window w, char *window_name); Status XFetchName(Display *display, Window w, char **window_name_return);Argumentsdisplay Specifies the connection to the X server. text_prop Specifies the XTextProperty structure to be used….

XStoreBytes, XStoreBuffer, XFetchBytes, XFetchBuffer, XRotateBuffers – manipulate cut and paste buffers Syntaxint XStoreBytes(Display *display, char *bytes, int nbytes); int XStoreBuffer(Display *display, char *bytes, int nbytes, int buffer); char *XFetchBytes(Display *display, int *nbytes_return); char *XFetchBuffer(Display *display, int *nbytes_return, int buffer); int XRotateBuffers(Display *display, int rotate);Argumentsbuffer Specifies the buffer in which you want to store the bytes…