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C Programming.. Typecasting of structure pointers..
Post 302694097 by Don Cragun on Thursday 30th of August 2012 06:51:10 AM
08-30-2012
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LEARN ABOUT CENTOS
xcb_poly_segment_checked
xcb_poly_segment(3) XCB Requests xcb_poly_segment(3) 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_gc_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. XCB
2014-06-10 xcb_poly_segment(3)