Linux Manuals session 3

XCreatePixmap, XFreePixmap – create or destroy pixmaps Syntax Pixmap XCreatePixmap(Display *display, Drawable d, unsigned int width, unsigned int height, unsigned int depth); int XFreePixmap(Display *display, Pixmap pixmap); Arguments d Specifies which screen the pixmap is created on. depth Specifies the depth of the pixmap. display Specifies the connection to the X server. pixmap Specifies the…

XChangeKeyboardMapping, XGetKeyboardMapping, XDisplayKeycodes, XSetModifierMapping, XGetModifierMapping, XNewModifiermap, XInsertModifiermapEntry, XDeleteModifiermapEntry, XFreeModifiermap, XModifierKeymap – manipulate keyboard encoding and keyboard encoding structure Syntax int XChangeKeyboardMapping(Display *display, int first_keycode, int keysyms_per_keycode, KeySym *keysyms, int num_codes); KeySym *XGetKeyboardMapping(Display *display, KeyCode first_keycode, int keycode_count, int *keysyms_per_keycode_return); int XDisplayKeycodes(Display *display, int *min_keycodes_return, int *max_keycodes_return); int XSetModifierMapping(Display *display, XModifierKeymap *modmap); XModifierKeymap *XGetModifierMapping(Display *display); XModifierKeymap…

XCreateGC, XCopyGC, XChangeGC, XGetGCValues, XFreeGC, XGContextFromGC, XGCValues – create or free graphics contexts and graphics context structure Syntax GC XCreateGC(Display *display, Drawable d, unsigned long valuemask, XGCValues *values); int XCopyGC(Display *display, GC src, unsigned long valuemask, GC dest); int XChangeGC(Display *display, GC gc, unsigned long valuemask, XGCValues *values); Status XGetGCValues(Display *display, GC gc, unsigned long…

XCreateFontSet, XFreeFontSet – create and free an international text drawing font set Syntax XFontSet XCreateFontSet(Display *display, char *base_font_name_list, char ***missing_charset_list_return, int *missing_charset_count_return, char **def_string_return); void XFreeFontSet(Display *display, XFontSet font_set); Arguments display Specifies the connection to the X server. base_font_name_list Specifies the base font names. def_string_return Returns the string drawn for missing charsets. font_set Specifies the…

XSetFontPath, XGetFontPath, XFreeFontPath – set, get, or free the font search path Syntax int XSetFontPath(Display *display, char **directories, int ndirs); char **XGetFontPath(Display *display, int *npaths_return); int XFreeFontPath(char **list); Arguments directories Specifies the directory path used to look for a font. Setting the path to the empty list restores the default path defined for the X…

XListFonts, XFreeFontNames, XListFontsWithInfo, XFreeFontInfo – obtain or free font names and information Syntax char **XListFonts(Display *display, char *pattern, int maxnames, int *actual_count_return); int XFreeFontNames(char *list[]); char **XListFontsWithInfo(Display *display, char *pattern, int maxnames, int *count_return, XFontStruct **info_return); int XFreeFontInfo(char **names, XFontStruct *free_info, int actual_count); Arguments actual_count Specifies the actual number of font names. actual_count_return Returns the…

XListFonts, XFreeFontNames, XListFontsWithInfo, XFreeFontInfo – obtain or free font names and information Syntax char **XListFonts(Display *display, char *pattern, int maxnames, int *actual_count_return); int XFreeFontNames(char *list[]); char **XListFontsWithInfo(Display *display, char *pattern, int maxnames, int *count_return, XFontStruct **info_return); int XFreeFontInfo(char **names, XFontStruct *free_info, int actual_count); Arguments actual_count Specifies the actual number of font names. actual_count_return Returns the…

XLoadFont, XQueryFont, XLoadQueryFont, XFreeFont, XGetFontProperty, XUnloadFont, XCharStruct, XFontProp, XChar2b, XFontStruct – load or unload fonts and font metric structures Syntax Font 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); Arguments atom…

XQueryExtension, XListExtensions, XFreeExtensionList – list available extensions Syntax Bool XQueryExtension(display, name, major_opcode_return, first_event_return, first_error_return) char **XListExtensions(display, nextensions_return) XFreeExtensionList(list) Arguments display Specifies the connection to the X server. name Specifies the extension name. major_opcode_return Returns the major opcode. first_event_return Returns the first event code, if any. first_error_return Returns the first error code, if any. nextensions_return Returns…

XGetEventData, XFreeEventData, XGenericEventCookie – retrieve and free additional event data through cookies. Syntax Bool XGetEventData(Display *display, XGenericEventCookie *cookie); void XFreeEventData(Display *display, XGenericEventCookie *cookie); Arguments display Specifies the connection to the X server. cookie Specifies the cookie to free or retrieve the data for. Structures typedef struct {         int type;         unsigned long serial;         Bool send_event;         Display *display;…

XListInputDevices, XFreeDeviceList – list available input devices Synopsis #include <X11/extensions/XInput.h> XDeviceInfo *XListInputDevices( Display *display, int *ndevices_return); int XFreeDeviceList( XDeviceInfo *list); display Specifies the connection to the X server. ndevices_return Specifies a pointer to a variable where the number of available devices can be returned. list Specifies the list of devices to free. The XFreeDeviceList function…

XRecolorCursor, XFreeCursor, XQueryBestCursor – manipulate cursors Syntax int 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); Arguments background_color Specifies the RGB values for the background of the source. cursor Specifies the cursor. d…

XAllocColor, XAllocNamedColor, XAllocColorCells, XAllocColorPlanes, XFreeColors – allocate and free colors Syntax Status 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,…

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

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)…

XFree – free client data Syntax int XFree(void *data); Arguments data Specifies the data that are to be freed. Description The 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…

XSetScreenSaver, XForceScreenSaver, XActivateScreenSaver, XResetScreenSaver, XGetScreenSaver – manipulate the screen saver Syntax int 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); Arguments allow_exposures Specifies the screen save control values. You can pass…

XFontsOfFontSet, XBaseFontNameListOfFontSet, XLocaleOfFontSet, XContextDependentDrawing, XContextualDrawing, XDirectionalDependentDrawing – obtain fontset information Syntax int 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); Arguments font_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. Description The…

XLoadFont, XQueryFont, XLoadQueryFont, XFreeFont, XGetFontProperty, XUnloadFont, XCharStruct, XFontProp, XChar2b, XFontStruct – load or unload fonts and font metric structures Syntax Font 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); Arguments atom…

XFontSetExtents – XFontSetExtents structure Structures The 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…