File: Color_table.c

package info (click to toggle)
grass 6.4.4-1
  • links: PTS, VCS
  • area: main
  • in suites: jessie, jessie-kfreebsd
  • size: 104,028 kB
  • ctags: 40,409
  • sloc: ansic: 419,980; python: 63,559; tcl: 46,692; cpp: 29,791; sh: 18,564; makefile: 7,000; xml: 3,505; yacc: 561; perl: 559; lex: 480; sed: 70; objc: 7
file content (28 lines) | stat: -rw-r--r-- 508 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

#include <stdio.h>
#include <stdlib.h>

#include <grass/gis.h>
#include <grass/colors.h>
#include "psdriver.h"

void init_color_table(void)
{
    NCOLORS = true_color ? (1 << 24) : (1 << 8);
}

static int get_color_rgb(int r, int g, int b)
{
    return (r << 16) + (g << 8) + b;
}

static int get_color_gray(int r, int g, int b)
{
    return (int)(r * 0.299 + g * 0.587 + b * 0.114);
}

int PS_lookup_color(int r, int g, int b)
{
    return true_color ? get_color_rgb(r, g, b)
	: get_color_gray(r, g, b);
}