named_colr.c

Go to the documentation of this file.

#include <grass/gis.h>
#include <string.h>
#include <stdio.h>
 
static struct {
    const char *name;
    float r, g, b;
} colors[] = {
    {"white", 1.00, 1.00, 1.00},   {"black", 0.00, 0.00, 0.00},
    {"red", 1.00, 0.00, 0.00},     {"green", 0.00, 1.00, 0.00},
    {"blue", 0.00, 0.00, 1.00},    {"yellow", 1.00, 1.00, 0.00},
    {"magenta", 1.00, 0.00, 1.00}, {"cyan", 0.00, 1.00, 1.00},
    {"aqua", 0.00, 0.75, 0.75},    {"grey", 0.75, 0.75, 0.75},
    {"gray", 0.75, 0.75, 0.75},    {"orange", 1.00, 0.50, 0.00},
    {"brown", 0.75, 0.50, 0.25},   {"purple", 0.50, 0.00, 1.00},
    {"violet", 0.50, 0.00, 1.00},  {"indigo", 0.00, 0.50, 1.00},
    {"", 0.00, 0.00, 0.00} /* do not modify this line */
};
 
int G_color_values(const char *name, float *r, float *g, float *b)
{
    int i;
 
    *r = *g = *b = 0.0;
    for (i = 0; colors[i].name[0]; i++)
        if (strcmp(name, colors[i].name) == 0) {
            *r = colors[i].r;
            *g = colors[i].g;
            *b = colors[i].b;
            return 1;
        }
    return -1;
}
 
const char *G_color_name(int n)
{
    int i;
 
    if (n >= 0)
        for (i = 0; colors[i].name[0]; i++)
            if (i == n)
                return colors[i].name;
    return NULL;
}