GFX lib: ex3.c Source File

00001 /*=========================================================================
00002 
00003 GFX EXAMPLE CODE - #3
00004         "colorful bars"
00005 
00006 Copyright (C) 2004  Rafael de Oliveira Jannone
00007 
00008 This example's source code is Public Domain.
00009 
00010 WARNING: The author makes no guarantees and holds no responsibility for 
00011 any damage, injury or loss that may result from the use of this source 
00012 code. USE IT AT YOUR OWN RISK.
00013 
00014 Contact the author:
00015         by e-mail : rafael AT jannone DOT org
00016         homepage  : http://jannone.org/gfxlib
00017         ICQ UIN   : 10115284
00018 
00019 =========================================================================*/
00020 
00021 #include <stdlib.h>
00022 #include "gfx.h"
00023 
00024 main() {
00025         u_int addr;
00026         int c, l;
00027 
00028         set_color(15, 1, 1);
00029 
00030         // set video mode to screen 2
00031         set_mode(mode_2);
00032 
00033         // draw horizontal lines
00034         for (c = 0; c < MODE2_MAX; c += 8)
00035                 vpoke(MODE2_ATTR + c, 0xFF);
00036 
00037         // for each column...
00038         for (c = 0; c < 32; c++) {
00039                 // randomly draw one colored vertical bar
00040                 l = rand() & 63;
00041                 addr = map_pixel(c << 3, 96 - l);
00042                 fill_v(8192 + addr, (c % 14) + 2, l << 1);
00043         }       
00044         while (!get_trigger(0)) {}
00045 
00046         set_mode(mode_0);
00047 }