Garbo/Garbo.cdr/pc/graphics/gl.pak/DEMO.C

C/C++ Source or Header | 1989-03-31 | 5.0 KB | 156 lines

#ifndef lint
static char sccsid[] = "@(#) demo.c 5.1 89/02/20";
#endif
/*
 *    Copyright (c) David T. Lewis 1987, 1988
 *    All rights reserved.
 *
 *    Permission is granted to use this for any personal noncommercial use.
 *    You may not distribute source or executable code for profit, nor
 *    may you distribute it with a commercial product without the written
 *    consent of the author.  Please send modifications to the author for
 *    inclusion in updates to the program.  Thanks.
 */
#include "config.h"
#include "gl.h"
#include <stdio.h>
#if MIX_C
#else
#include <time.h>
#endif /* MIX_C */
extern int lines(), strings(), chars(), strokeset(), fillscreen();
extern int charset(), ellipses(), arcs(), testplot(), showcursor();
extern int linestyles(), curvestyles();
static int mode;
void usage(progname)
char *progname;
{
    fprintf (stderr,"Usage:  %s <mode>\n\n",progname);
    fprintf (stderr,"Where <mode> is:\n",0);
    fprintf (stderr,"\t4 (CGA 4 color 320 x 200)\n",0);
    fprintf (stderr,"\t6 (CGA 2 color 640 x 200)\n",0);
    fprintf (stderr,"\t8 (Hercules page 0, 720 x 348)\n",0);
    fprintf (stderr,"\t9 (Hercules page 1, 720 x 348)\n",0);
    fprintf (stderr,"\t16 (EGA color 640 x 350)\n",0);
    fprintf (stderr,"\t256 (IBM / Epson compatible printer)\n",0);
    fprintf (stderr,"\t257 (Laserjet+ printer)\n\n",0);
}
main(argc,argv)
int argc;
char *argv[];
{
    char str[80];
    long time();
    struct tm *gmtime();
    void srand();
    printf("\nThis demonstration will show the operation of the gl ",0);
    printf("graphics functions.\n",0);
    printf("The <delete> key stops the demo.  Press <return> ",0);
    printf("to view each\n",0);
    printf("successive screen.\n\n",0);
    printf("Note: The GLMODE shell variable may be used to specify ",0);
    printf("the graphics\n",0);
    printf("mode to use.\n\n",0);
    printf("Press <return> to continue...",0);
    gets(str);
    /* Get the mode to use. */
    if (argc < 2) mode = ENV_MODE;
    else if (argc == 2)  {
        if (sscanf(argv[1],"%d",&(mode)) != 1)  {
            usage(argv[0]);
            exit (1);
        }
    }
    else  {
        usage(argv[0]);
        exit (1);
    }
    /* Set video mode.    */
    if (g_init(mode))  {
        usage(argv[0]);
        fprintf(stderr,"WARNING:  Possible invalid shared memory ",0);
        fprintf(stderr,"key for requested video mode.\n",0);
        exit (1);
    }
    /* Draw patterns.    */
    if (mode > MAXVIDEO) printf("\nRasterizing output...",0);
    if (lines()) fprintf(stderr,"Failed call to lines().\n");
    if (mode > MAXVIDEO)
        printf("\nPress <Return> to send to printer...",0);
    gets(str);
    if (mode > MAXVIDEO) printf("\nRasterizing output...",0);
    g_clear();
    if (linestyles()) fprintf(stderr,"Failed call to linestyles().\n");
    if (mode > MAXVIDEO)
        printf("\nPress <Return> to send to printer...",0);
    gets(str);
    if (mode > MAXVIDEO) printf("\nRasterizing output...",0);
    g_clear();
    if (strings()) fprintf(stderr,"Failed call to strings().\n");
    if (mode > MAXVIDEO)
        printf("\nPress <Return> to send to printer...",0);
    gets(str);
    if (mode > MAXVIDEO) printf("\nRasterizing output...",0);
    g_clear();
    slanttext();
    if (mode > MAXVIDEO)
        printf("\nPress <Return> to send to printer...",0);
    gets(str);
    if (mode > MAXVIDEO) printf("\nRasterizing output...",0);
    g_clear();
    strokeset();
    if (mode > MAXVIDEO)
        printf("\nPress <Return> to send to printer...",0);
    gets(str);
    if (mode > MAXVIDEO) printf("\nRasterizing output...",0);
    g_clear();
    if (chars()) fprintf(stderr,"Failed call to chars().\n");
    if (mode > MAXVIDEO)
        printf("\nPress <Return> to send to printer...",0);
    gets(str);
    if (mode > MAXVIDEO) printf("\nRasterizing output...",0);
    g_clear();
    fillscreen();
    if (mode > MAXVIDEO)
        printf("\nPress <Return> to send to printer...",0);
    gets(str);
    if (mode > MAXVIDEO) printf("\nRasterizing output...",0);
    g_clear();
    charset();
    if (mode > MAXVIDEO)
        printf("\nPress <Return> to send to printer...",0);
    gets(str);
    if (mode > MAXVIDEO) printf("\nRasterizing output...",0);
    g_clear();
    ellipses();
    if (mode > MAXVIDEO)
        printf("\nPress <Return> to send to printer...",0);
    gets(str);
    if (mode > MAXVIDEO) printf("\nRasterizing output...",0);
    g_clear();
    curvestyles();
    if (mode > MAXVIDEO)
        printf("\nPress <Return> to send to printer...",0);
    gets(str);
    if (mode > MAXVIDEO) printf("\nRasterizing output...",0);
    g_clear();
    arcs();
    showcursor();
    g_finish();
    printf("\n\n\n\nThe next demonstration screen will use the ",0);
    printf("plot(3) interface, rather than\n",0);
    printf("direct calls to the gl library.  The plot(3) interface ",0);
    printf("determines graphic \n",0);
    printf("mode from the GLMODE shell variable, or if GLMODE is not ",0);
    printf("defined, uses a \n",0);
    printf("default mode value (defined in config.h). \n\n",0);
    printf("If you called this program with an argument on the ",0);
    printf("command line, the \n",0);
    printf("next screen may use a different graphics mode ",0);
    printf("than you specified. \n\n",0);
    printf("Press <return> to continue or <delete> to stop...",0);
    gets(str);
    testplot();
    gets(str);
}