1 /* $NetBSD: colorbars.c,v 1.1 2012/06/06 00:13:36 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 Nathanial Sloss <nathanialsloss@yahoo.com.au> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 #include <sys/cdefs.h> 29 __RCSID("$NetBSD: colorbars.c,v 1.1 2012/06/06 00:13:36 christos Exp $"); 30 31 #include <curses.h> 32 #include <stdio.h> 33 #include <string.h> 34 #include <err.h> 35 #include <stdlib.h> 36 37 int 38 main(void) 39 { 40 static struct colorInfo { 41 const char *name; 42 int color; 43 } colorInfo[] = { 44 { "Black", COLOR_BLACK }, 45 { "Red", COLOR_RED }, 46 { "Green", COLOR_GREEN }, 47 { "Yellow", COLOR_YELLOW }, 48 { "Blue", COLOR_BLUE }, 49 { "Magenta", COLOR_MAGENTA }, 50 { "Cyan", COLOR_CYAN }, 51 { "White", COLOR_WHITE }, 52 }; 53 size_t lengths[__arraycount(colorInfo)]; 54 55 static const size_t numcolors = __arraycount(colorInfo); 56 size_t labelwidth; 57 58 int colorOK; 59 int spacing, offsetx, labeloffsety, labeloffsetx; 60 61 if (!initscr()) 62 errx(EXIT_FAILURE, "Cannot initialize curses"); 63 64 colorOK = has_colors(); 65 if (!colorOK) { 66 endwin(); 67 errx(EXIT_FAILURE, "Terminal cannot display color"); 68 } 69 70 if (COLS < 45 || LINES < 10) { 71 endwin(); 72 errx(EXIT_FAILURE, "Terminal size must be at least 45x10."); 73 } 74 75 spacing = COLS / numcolors; 76 offsetx = (COLS - (spacing * numcolors)) / 2; 77 78 79 start_color(); 80 81 labelwidth = 0; 82 for (size_t i = 0; i < numcolors; i++) { 83 lengths[i] = strlen(colorInfo[i].name); 84 if (lengths[i] > labelwidth) 85 labelwidth = lengths[i]; 86 init_pair(i, COLOR_WHITE, colorInfo[i].color); 87 } 88 89 labeloffsetx = spacing / 2; 90 labeloffsety = (LINES - 1 - labelwidth) / 2; 91 clear(); 92 93 move(0, 0); 94 95 for (size_t i = 0; i < numcolors; i++) { 96 int xoffs = offsetx + spacing * i; 97 98 attrset(COLOR_PAIR(i)); 99 100 for (int line = 0; line < LINES - 1; line++) 101 for (int xpos = 0; xpos < spacing; xpos++) 102 mvprintw(line, xoffs + xpos, " "); 103 104 attrset(COLOR_PAIR(0)); 105 106 xoffs += labeloffsetx; 107 for (size_t line = 0; line < lengths[i]; line++) 108 mvprintw(line + labeloffsety, xoffs, "%c", 109 colorInfo[i].name[line]); 110 } 111 112 attrset(COLOR_PAIR(0)); 113 114 mvprintw(LINES - 1, 0, "ANSI Color chart - Press any key to exit: "); 115 116 refresh(); 117 118 getch(); 119 120 endwin(); 121 122 return EXIT_SUCCESS; 123 } 124 125