Linux Manuals session 3

XmbTextExtents, XwcTextExtents, Xutf8TextExtents – compute text extents Syntax int XmbTextExtents(XFontSet font_set, char *string, int num_bytes, XRectangle *overall_ink_return, XRectangle *overall_logical_return); int XwcTextExtents(XFontSet font_set, wchar_t *string, int num_wchars, XRectangle *overall_ink_return, XRectangle *overall_logical_return); int Xutf8TextExtents(XFontSet font_set, char *string, int num_bytes, XRectangle *overall_ink_return, XRectangle *overall_logical_return); Arguments font_set Specifies the font set. num_bytes Specifies the number of bytes in the…

XmbTextEscapement, XwcTextEscapement, Xutf8TextEscapement – obtain the escapement of text Syntax int XmbTextEscapement(XFontSet font_set, char *string, int num_bytes); int XwcTextEscapement(XFontSet font_set, wchar_t *string, int num_wchars); int Xutf8TextEscapement(XFontSet font_set, char *string, int num_bytes); Arguments font_set Specifies the font set. num_bytes Specifies the number of bytes in the string argument. num_wchars Specifies the number of characters in the…

XmbResetIC, XwcResetIC, Xutf8ResetIC – reset the state of an input context Syntax char *XmbResetIC(XIC ic); wchar_t *XwcResetIC(XIC ic); char *Xutf8ResetIC(XIC ic); Arguments ic Specifies the input context. Description When XNResetState is set to XIMInitialState, XmbResetIC, XwcResetIC and Xutf8ResetIC reset an input context to its initial state; when XNResetState is set to XIMPreserveState, the current input…

XmbLookupString, XwcLookupString, Xutf8LookupString – obtain composed input from an input method Syntax int XmbLookupString(XIC ic, XKeyPressedEvent *event, char *buffer_return, int bytes_buffer, KeySym *keysym_return, Status *status_return); int XwcLookupString(XIC ic, XKeyPressedEvent *event, wchar_t *buffer_return, int wchars_buffer, KeySym *keysym_return, Status *status_return); int Xutf8LookupString(XIC ic, XKeyPressedEvent *event, char *buffer_return, int bytes_buffer, KeySym *keysym_return, Status *status_return); Arguments buffer_return Returns a…

XmbTextListToTextProperty, XwcTextListToTextProperty, Xutf8TextListToTextProperty, XmbTextPropertyToTextList, XwcTextPropertyToTextList, Xutf8TextPropertyToTextList, XwcFreeStringList, XDefaultString – convert text lists and text property structures Syntax int XmbTextListToTextProperty(Display *display, char **list, int count, XICCEncodingStyle style, XTextProperty *text_prop_return); int XwcTextListToTextProperty(Display *display, wchar_t **list, int count, XICCEncodingStyle style, XTextProperty *text_prop_return); int Xutf8TextListToTextProperty(Display *display, char **list, int count, XICCEncodingStyle style, XTextProperty *text_prop_return); int XmbTextPropertyToTextList(Display *display, XTextProperty *text_prop,…

XmbDrawText, XwcDrawText, Xutf8DrawText – draw text using multiple font sets Syntax void XmbDrawText(Display *display, Drawable d, GC gc, int x, int y, XmbTextItem *items, int nitems); void XwcDrawText(Display *display, Drawable d, GC gc, int x, int y, XwcTextItem *items, int nitems); void Xutf8DrawText(Display *display, Drawable d, GC gc, int x, int y, XmbTextItem *items, int…

XmbDrawString, XwcDrawString, Xutf8DrawString – draw text using a single font set Syntax void XmbDrawString(Display *display, Drawable d, XFontSet font_set, GC gc, int x, int y, char *string, int num_bytes); void XwcDrawString(Display *display, Drawable d, XFontSet font_set, GC gc, int x, int y, wchar_t *string, int num_wchars); void Xutf8DrawString(Display *display, Drawable d, XFontSet font_set, GC gc,…

XmbDrawImageString, XwcDrawImageString, Xutf8DrawImageString – draw image text using a single font set Syntax void XmbDrawImageString(Display *display, Drawable d, XFontSet font_set, GC gc, int x, int y, char *string, int num_bytes); void XwcDrawImageString(Display *display, Drawable d, XFontSet font_set, GC gc, int x, int y, wchar_t *string, int num_wchars); void Xutf8DrawImageString(Display *display, Drawable d, XFontSet font_set, GC…

XvVideoNotify – event generated for video processing Synopsis #include <X11/extensions/Xvlib.h>   typedef union {  int type;  XvVideoNotifyEvent xvvideo;  XvPortNotifyEvent xvport;  long pad[24];   } XvEvent;   typedef struct {  int type;  unsigned long serial;  Bool send_event;  Display *display;  Drawable drawable;  unsigned long reason;  XvPortID port_id;  Time time;   } XvVideoNotifyEvent; type Specifies the type of event: XvVideoNotify. serial Number of the last request processed…

XvUngrabPort – release port grabbed for video operation Synopsis #include <X11/extensions/Xvlib.h> int XvUngrabPort(Display *dpy, XvPortID port, Time time); Arguments dpy Specifies the connection to the X server. port Specifies the port to be released. If the port had not been previously grabbed, the request is ignored. time Specifies the request timestamp. Description XvUngrabPort(3)  releases a…

XvStopVideo – stop active video Synopsis #include <X11/extensions/Xvlib.h> int XvStopVideo(Display *dpy, XvPortID port, Drawable draw); Arguments dpy Specifies the connection to the X server. port Specifies the port for which video is to be stopped. draw Specifies the drawable associated with the named port. Description XvStopVideo(3) stops active video for the specified port and drawable….

XvPutImage, XvShmPutImage – display an XvImage Synopsis #include <X11/extensions/Xvlib.h> int XvPutImage (Display *dpy, XvPortID port, Drawable d, GC gc, XvImage *image, int src_x, int src_y, unsigned int src_w, unsigned int src_h, int dest_x, int dest_y, unsigned int dest_w, unsigned int dest_h); int XvShmPutImage (Display *dpy, XvPortID port, Drawable d, GC gc, XvImage *image, int src_x,…

XvCreateImage, XvShmCreateImage – create an XvImage Synopsis #include <X11/extensions/Xvlib.h> XvImage * XvCreateImage (Display *dpy, XvPortID port, int id, char *data, int width, int height); XvImage * XvShmCreateImage (Display *dpy, XvPortID port, int id, char *data, int width, int height, XShmSegmentInfo *shminfo); Arguments dpy Specifies the connection to the X server. port Specifies the port the…

XvSetPortAttribute – sets an attribute of a video port Synopsis #include <X11/extensions/Xvlib.h> int XvSetPortAttribute(Display *dpy, XvPortID port, Atom attribute, int value); Arguments dpy Specifies the connection to the X server. port Specifies the port for which the attribute is to be used. attribute Identifies the port attribute to be set by this request. Can be…

XvSelectVideoNotify – enable or disable VideoNotify events Synopsis #include <X11/extensions/Xvlib.h> int XvSelectVideoNotify(Display *dpy, Drawable drawable, Bool onoff); Arguments dpy Specifies the connection to the X server. drawable Defines the drawable in which video activity is to be reported. onoff Selects whether video notification is enabled or disabled. Description XvSelectVideoNotify(3) enables or disables XvVideoNotify(3) events to…

XvSelectPortNotify – enable or disable XvPortNotify events Synopsis #include <X11/extensions/Xvlib.h> int XvSelectPortNotify(Display *dpy, XvPortID port, Bool onoff); Arguments dpy Specifies the connection to the X server. port Specifies the port for which PortNotify events are to be generated when its attributes are changed using XvSetPortAttribute(3) onoff Specifies whether notification is to be enabled or disabled….

XvQueryPortAttributes – return list of attributes of a video port Synopsis #include <X11/extensions/Xvlib.h> XvAttribute* XvQueryPortAttributes(Display *dpy, XvPortID port, int *p_num_attributes); Arguments dpy Specifies the connection to the X server. port Specifies the port whose adaptor is to be queried for its list of attributes. p_num_attributes A pointer to where the number of attributes returned in…

XvQueryExtension – return version and release of extension Synopsis #include <X11/extensions/Xvlib.h> int XvQueryExtension(Display *dpy, unsigned int *p_version, unsigned int *p_revision, unsigned int *p_request_base, unsigned int *p_event_base, unsigned int *p_error_base); Arguments dpy Specifies the connection to the X server. p_version Pointer to where the current version number of the Xv video extension is written. p_revision Pointer…

XvQueryEncodings – return list of encodings for an adaptor Synopsis #include <X11/extensions/Xvlib.h> int XvQueryEncodings(Display *dpy, XvPortID port, unsigned int *p_num_encodings, XvEncodingInfo **pp_encoding_info); Arguments dpy Specifies the connection to the X server. port Specifies the port whose adaptor is to be queried for its list of encodings. p_num_encodings A pointer to where the number of encodings…

XvQueryBestSize – determine the optimum drawable region size Synopsis #include <X11/extensions/Xvlib.h> int XvQueryBestSize(Display *dpy, XvPort port, Bool motion, unsigned int vw, unsigned int vh, unsigned int dw, unsigned int dh, unsigned int *p_dw, unsigned int *p_dh); Arguments dpy Specifies the connection to the X server. port Defines the port associated with the display and adaptor…