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Annotation of 43BSDTahoe/usr.lib/libplot/aed/open.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1980 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  */
                      6: 
                      7: #ifndef lint
                      8: static char sccsid[] = "@(#)open.c     5.2 (Berkeley) 4/30/85";
                      9: #endif not lint
                     10: 
                     11: 
                     12: /*
                     13:  * Displays plot files on a AED512 graphics terminal.
                     14:  */
                     15: 
                     16: #include "aed.h"
                     17: 
                     18: char dbuf[BUFSIZ];     /* Used to buffer display characters */
                     19: struct sgttyb sgttyb;  /* Used to save terminal control bits */
                     20: curx, cury;            /* Current screen position */
                     21: int xbot, ybot;                /* Coordinates of screen lower-left corner */
                     22: int scale;             /* The number of pixels per 2**12 units
                     23:                         * of world coordinates.
                     24:                         */
                     25: 
                     26: /*
                     27:  * The following is the color map, containing reg, green, and blue
                     28:  * values for color locations 0 and 1.
                     29:  */
                     30: 
                     31: static int colors[] = {200, 200, 200, 0, 0, 125, 125, 0, 0, 125, 0, 0};
                     32: 
                     33: /*---------------------------------------------------------
                     34:  *     Openpl initializes the graphics display and clears its screen.
                     35:  *
                     36:  *     Results:        None.
                     37:  *
                     38:  *     Side Effects:
                     39:  *     The display is re-initialized and the file is remembered for
                     40:  *     use in all subsequent calls to this module.  The display's
                     41:  *     color map is reset.  The display is put into raw mode, but
                     42:  *     the previous mode bits are saved.
                     43:  *
                     44:  *     Errors:         None.
                     45:  *---------------------------------------------------------
                     46:  */
                     47: openpl()
                     48: {
                     49:     int flags, *p, i;
                     50:     char dum[4];
                     51: 
                     52:     /* First, grab up the display modes, then reset them to put it
                     53:      * into cooked mode.  Also, lock the terminal.
                     54:      */
                     55: 
                     56:     (void) gtty(fileno(stdout), &sgttyb);
                     57:     flags = sgttyb.sg_flags;
                     58:     sgttyb.sg_flags = (sgttyb.sg_flags & ~(RAW | CBREAK)) | EVENP | ODDP;
                     59:     (void) stty(fileno(stdout), &sgttyb);
                     60:     sgttyb.sg_flags = flags;
                     61: 
                     62:     /* Save the file pointer around for later use, then output an
                     63:      * initialization string to the display.  The initialization
                     64:      * string resets the terminal, sets formats, clears the display,
                     65:      * initializes the read and write masks, and sets the color map.
                     66:      */
                     67: 
                     68:     setbuf(stdout, dbuf);
                     69:     fputs("\33\33G1HHHN[00LFFCFFMFFFFFFFF", stdout);
                     70:     fputs("K0004", stdout);
                     71:     p = colors;
                     72:     for (i=0; i<12; i++)
                     73:     {
                     74:        chex(*p++, dum, 2);
                     75:        fputs(dum, stdout);
                     76:     }
                     77:     fputs("^15060AL", stdout);
                     78:     scale = 1<<12;
                     79:     curx = cury = xbot = ybot = 0;
                     80:     (void) fflush(stdout);
                     81: }

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