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290 ira 1 
#include <stdio.h>
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#include <ggi/ggi.h>
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#define BLACK 0
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#define RED   1
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#define GREEN 2
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#define BLUE  3
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#define WHITE 4
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static ggi_visual_t vis;
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static ggi_color palette[5];
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/* Initialize the palette's colors */
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void init_palette ()
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{
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    palette[0].r = 0;
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    palette[0].g = 0;
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    palette[0].b = 0;
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    palette[1].r = 0xffff;
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    palette[1].g = 0;
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    palette[1].b = 0;
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    palette[2].r = 0;
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    palette[2].g = 0xffff;
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    palette[2].b = 0;
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    palette[3].r = 0;
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    palette[3].g = 0;
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    palette[3].b = 0xffff;
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    palette[4].r = 0xffff;
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    palette[4].g = 0xffff;
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    palette[4].b = 0xffff;
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}
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/* Initialize GGI for drawing */
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void draw_init ()
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{
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    init_palette ();
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    if (ggiInit () != 0)
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    {
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        printf ("Error initialising GGI!\n");
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        exit (1);
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    }
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    if ((vis = ggiOpen (NULL)) == NULL)
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    {
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        printf ("Error opening visual!\n");
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        ggiExit ();
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        exit (1);
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    }
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    if (ggiSetSimpleMode (vis, GGI_AUTO, GGI_AUTO, 0, GT_AUTO))
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    {
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        printf ("Set the GGI_DISPLAY variable to the palemu!\n");
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        exit (1);
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    }
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    ggiSetPalette (vis, 0, 5, palette);
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}
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/* Close GGI when we're done drawing */
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void draw_close ()
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{
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    ggiClose (vis);
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    ggiExit ();
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}
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void draw_clrscreen ()
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{
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    ggiSetGCForeground (vis, BLACK);
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    ggiFillscreen (vis);
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}
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void draw_putpixel (int x, int y, int color)
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{
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    ggiSetGCForeground (vis, color);
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    ggiDrawPixel (vis, x, y);
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}
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void draw_flush ()
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{
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    ggiFlush (vis);
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}
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void draw_box (int x, int y, int width, int height, int color)
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{
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    ggiSetGCForeground (vis, color);
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    ggiDrawBox (vis, x, y, width, height);
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}
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void draw_line (int x1, int y1, int x2, int y2, int color)
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{
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    ggiSetGCForeground (vis, color);
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    ggiDrawLine (vis, x1, y1, x2, y2);
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}
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int main ()
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{
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    /* Initialize */
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    draw_init ();
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    /* Use */
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    draw_clrscreen ();
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    draw_putpixel (20, 20, RED);
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    draw_box (50, 50, 100, 100, GREEN);
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    draw_line (30, 20, 300, 180, BLUE);
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    draw_box (100, 80, 100, 100, WHITE);
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    draw_flush ();
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    /* Sleep until the keyboard is pressed */
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    ggiGetc (vis);
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    draw_clrscreen ();
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    draw_putpixel (40, 40, RED);
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    draw_putpixel (20, 20, GREEN);
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    draw_putpixel (30, 30, BLUE);
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    draw_flush ();
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    ggiGetc (vis);
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    /* Quit */
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    draw_close ();
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    return (0);
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}