Section 3: library functions
XvQueryAdaptors – return adaptor information for a screen Synopsis #include <X11/extensions/Xvlib.h> int XvQueryAdaptors(Display *dpy, Window window, unsigned int *p_num_adaptors, XvAdaptorInfo **pp_adaptor_info); Arguments dpy Specifies the connection to the X server. window Specifies a window of the screen for which the adaptor information is desired. p_num_adaptors A pointer to where the number of adaptors for the…
XvPutVideo – write video into a drawable Synopsis #include <X11/extensions/Xvlib.h> int XvPutVideo(Display *dpy, XvPortID port, Drawable d, GC gc, int vx, int vy, unsigned int vw, unsigned int vh, int dx, int dy, unsigned int dw, unsigned int dh); Arguments dpy Specifies the connection to the X server. port Defines the port from which to…
XvPutStill – write a single frame of video to a drawable Synopsis #include <X11/extensions/Xvlib.h> int XvPutStill(Display *dpy, XvPortID port, Drawable d, GC gc, int vx, int vy, unsigned int vw, unsigned int vh, int dx, int dy, unsigned int dw, unsigned int dh); Arguments dpy Specifies the connection to the X server. port Defines the…
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,…
XvPortNotify – event generated when port attributes change 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; XvPortID port_id; Time time; Atom attribute; long value; } XvPortNotifyEvent; type Specifies the type of event: XvPortNotify. serial Number of the last request processed…
XvListImageFormats – return list of image formats supported by a video port Syntax #include <X11/extensions/Xvlib.h> XvImageFormatValues * XvListImageFormats (Display *dpy, XvPortID port, int *p_num_formats); 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_formats A pointer to where the number…
XvGrabPort – lock port for exclusive use by client Synopsis #include <X11/extensions/Xvlib.h> int XvGrabPort(Display *dpy, XvPortID port, Time time); Arguments dpy Specifies the connection to the X server. port Defines the port to be grabbed. time Specifies the request timestamp. Description XvGrabPort(3) grabs a port. Once a client grabs a port, only that client can…
XvGetVideo – capture video from a drawable Synopsis #include <X11/extensions/Xvlib.h> int XvGetVideo(Display *dpy, XvPortID port, Drawable d, GC gc, int vx, int vy, unsigned int vw, unsigned int vh, int dx, int dy, unsigned int dw, unsigned int dh); Arguments dpy Specifies the connection to the X server. port Defines the port to which video…
XvGetStill – capture a single frame of video from a drawable Synopsis #include <X11/extensions/Xvlib.h> int XvGetStill(Display *dpy, XvPortID port, Drawable d, GC gc, int vx, int vy, unsigned int vw, unsigned int vh, int dx, int dy, unsigned int dw, unsigned int dh); Arguments dpy Specifies the connection to the X server. port Defines the…
XvGetPortAttribute – return current port attribute value Synopsis #include <X11/extensions/Xvlib.h> int XvGetPortAttribute(Display *dpy, XvPortID port, Atom attribute, int p_value); Arguments dpy Specifies the connection to the X server. port Specifies the port, associated with the given display, for which the attribute values are to be returned. attribute An atom that identifies the attribute to be…
XvFreeEncodingInfo – free encoding information Synopsis void XvFreeEncodingInfo(XvEncodingInfo *p_encoding_info); Arguments p_encoding_info Pointer to where the encoding information is located. Description XvFreeEncodingInfo(3) frees encoding information that was returned by XvQueryEncodings(3). The data structure used for encoding information is defined in the reference page for XvQueryEncodings(3). See Also XvQueryEncodings(3)
XvFreeAdaptorInfo – free adaptor information Synopsis void XvFreeAdaptorInfo(XvAdaptorInfo *p_adaptor_info); Arguments p_adaptor_info Pointer to where the adaptor information is located. Description XvFreeAdaptorInfo(3) frees adaptor information that was returned by XvQueryAdaptors(3). The data structure used for adaptor information is defined in the reference page for XvQueryAdaptors(3). See Also XvQueryAdaptors(3), XvFreeEncodingInfo(3)
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…
Xv – X Window System video extension Description The X Video Extension (Xv) extension provides support for video adaptors attached to an X display. It takes the approach that a display may have one or more video adaptors, each of which has one or more ports through which independent video streams pass. An adaptor may…
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,…
XmbTextPerCharExtents, XwcTextPerCharExtents, Xutf8TextPerCharExtents – obtain per-character information for a text string Syntax Status XmbTextPerCharExtents(XFontSet font_set, char *string, int num_bytes, XRectangle *ink_array_return, XRectangle *logical_array_return, int array_size, int *num_chars_return, XRectangle *overall_ink_return, XRectangle *overall_logical_return); Status XwcTextPerCharExtents(XFontSet font_set, wchar_t *string, int num_wchars, XRectangle *ink_array_return, XRectangle *logical_array_return, int array_size, int *num_chars_return, XRectangle *overall_ink_return, XRectangle *overall_logical_return); Status Xutf8TextPerCharExtents(XFontSet font_set, char *string,…
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,…
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…
XSetWMProperties, XmbSetWMProperties, Xutf8SetWMProperties – set standard window properties Syntax void XSetWMProperties(Display *display, Window w, XTextProperty *window_name, XTextProperty *icon_name, char **argv, int argc, XSizeHints *normal_hints, XWMHints *wm_hints, XClassHint *class_hints); void XmbSetWMProperties(Display *display, Window w, char *window_name, char *icon_name, char *argv[], int argc, XSizeHints *normal_hints, XWMHints *wm_hints, XClassHint *class_hints); void Xutf8SetWMProperties(Display *display, Window w, char *window_name, char…