symbol.c File Reference

#include <grass/gis.h>
#include <grass/display.h>
#include <grass/symbol.h>
#include <grass/glocale.h>

Include dependency graph for symbol.c:

Go to the source code of this file.

Functions
void	D_symbol (const SYMBOL *Symb, double x0, double y0, const RGBA_Color *line_color, const RGBA_Color *fill_color)
	draw a symbol at pixel coordinates More...
void	D_symbol2 (const SYMBOL *Symb, double x0, double y0, const RGBA_Color *primary_color, const RGBA_Color *secondary_color)
	draw a symbol at pixel coordinates (alternate) More...

Function Documentation

D_symbol()

void D_symbol	(	const SYMBOL *	Symb,
		double	x0,
		double	y0,
		const RGBA_Color *	line_color,
		const RGBA_Color *	fill_color
	)

draw a symbol at pixel coordinates

Draws a symbol (one of $GISBASE/etc/symbols/) to the active display. The starting x0,y0 coordinate corresponds to the center of the icon. The symbol must be pre-processed with S_stroke() before being sent to this function.

Example

#include <grass/display.h>
#include <grass/symbol.h>
...
SYMBOL *Symb;
Symb = S_read( symbol_name );
S_stroke( Symb, size, rotation, tolerance );
D_symbol( Symb, x0, y0, line_color, fill_color );

Parameters

Symb	The symbol name (e.g. basic/circle)
x0	The starting x display coordinate (pixel)
y0	The starting y display coordinate (pixel)
line_color	Outline color
fill_color	Fill color

Returns

void

Definition at line 153 of file symbol.c.

D_symbol2()

void D_symbol2	(	const SYMBOL *	Symb,
		double	x0,
		double	y0,
		const RGBA_Color *	primary_color,
		const RGBA_Color *	secondary_color
	)

draw a symbol at pixel coordinates (alternate)

Draws a symbol (one of $GISBASE/etc/symbols/) to the active display. The same as D_symbol(), but it uses a primary and secondary color instead of line and fill color. The primary color is used to draw stroke lines (STRINGs) and as the fill color for polygons. The secondary color is used for polygon outlines.

Parameters

Symb	The symbol name (e.g. basic/circle)
x0	The starting x display coordinate (pixel)
y0	The starting y display coordinate (pixel)
primary_color	Primary draw color
secondary_color	Secondary draw color

Returns

void

Definition at line 177 of file symbol.c.