cairodriver/line_width.c

Go to the documentation of this file.

/*!
   \file lib/cairodriver/line_width.c
 
   \brief GRASS cairo display driver - set line width
 
   (C) 2007-2008 by Lars Ahlzen and the GRASS Development Team
 
   This program is free software under the GNU General Public License
   (>=v2). Read the file COPYING that comes with GRASS for details.
 
   \author Lars Ahlzen <lars ahlzen.com> (original contributor)
   \author Glynn Clements
 */
 
#include <grass/gis.h>
#include "cairodriver.h"
 
#define MIN_WIDTH 1
 
static double previous_width = -1;
 
/*!
   \brief Set line width
 
   \param width line width (double precision)
 */
void Cairo_Line_width(double width)
{
    G_debug(1, "Cairo_Line_width: %f", width);
 
    width = MAX(MIN_WIDTH, width);
    if (width != previous_width)
        cairo_set_line_width(cairo, width);
 
    return;
}