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cairodriver/line_width.c
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/*!
\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;
}
MIN_WIDTH
#define MIN_WIDTH
Definition cairodriver/line_width.c:18
Cairo_Line_width
void Cairo_Line_width(double width)
Set line width.
Definition cairodriver/line_width.c:27
cairodriver.h
GRASS cairo display driver - header file.
cairo
cairo_t * cairo
Definition cairodriver/graph.c:46
G_debug
int G_debug(int level, const char *msg,...)
Print debugging message.
Definition debug.c:66
MAX
#define MAX(a, b)
Definition parson.c:91