xcb_poly_segment_checked (3) - Linux Manuals

xcb_poly_segment_checked: draw lines

Command to display xcb_poly_segment_checked manual in Linux: $ man 3 xcb_poly_segment_checked

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?

AUTHOR

Generated from xproto.xml. Contact xcb [at] lists.freedesktop.org for corrections and improvements.