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xcb_poly_segment

Section: XCB Requests (3)
Updated: libxcb 1.11
Index Return to Main Contents
 

NAME

xcb_poly_segment - draw lines  

SYNOPSIS

#include <xcb/xproto.h>  

Request function

xcb_void_cookie_t xcb_poly_segment(xcb_connection_t *conn, xcb_drawable_t drawable, xcb_gcontext_t gc, uint32_t segments_len, const xcb_segment_t *segments);
 

REQUEST ARGUMENTS

conn
The XCB connection to X11.
drawable
A drawable (Window or Pixmap) to draw on.
gc
The graphics context to use.

TODO: document which attributes of a gc are used

segments_len
The number of xcb_segment_t structures in segments.
segments
An array of xcb_segment_t structures.
 

DESCRIPTION

Draws multiple, unconnected lines. For each segment, a line is drawn between (x1, y1) and (x2, y2). The lines are drawn in the order listed in the array of xcb_segment_t structures and does not perform joining at coincident endpoints. For any given line, a pixel is not drawn more than once. If lines intersect, the intersecting pixels are drawn multiple times.

TODO: include the xcb_segment_t data structure

TODO: an example  

RETURN VALUE

Returns an xcb_void_cookie_t. Errors (if any) have to be handled in the event loop.

If you want to handle errors directly with xcb_request_check instead, use xcb_poly_segment_checked. See xcb-requests(3) for details.  

ERRORS

xcb_drawable_error_t
The specified drawable does not exist.
xcb_g_context_error_t
The specified gc does not exist.
xcb_match_error_t
TODO: reasons?
 

SEE ALSO

xcb-requests(3)  

AUTHOR

Generated from xproto.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.


 

Index

NAME
SYNOPSIS
Request function
REQUEST ARGUMENTS
DESCRIPTION
RETURN VALUE
ERRORS
SEE ALSO
AUTHOR


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