GRASS GIS 7 Programmer's Manual  7.9.dev(2021)-e5379bbd7
psdriver/color.c
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1 
2 #include <grass/gis.h>
3 #include "psdriver.h"
4 
5 void PS_Color(int r, int g, int b)
6 {
7  if (ps.true_color)
8  output("%d %d %d COLOR\n", r, g, b);
9  else
10  output("%d GRAY\n", (int)(r * 0.299 + g * 0.587 + b * 0.114));
11 }
ps
struct ps_state ps
Definition: psdriver/graph_set.c:26
ps_state::true_color
int true_color
Definition: psdriver.h:15
b
double b
Definition: r_raster.c:39
g
float g
Definition: named_colr.c:8
PS_Color
void PS_Color(int r, int g, int b)
Definition: psdriver/color.c:5
output
void output(const char *fmt,...)
Definition: psdriver/graph_set.c:236
r
double r
Definition: r_raster.c:39