82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
/*
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* Copyright (c) 1980 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)open.c 1.1 94/10/31 SMI"; /* from UCB 5.2 4/30/85 */
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#endif not lint
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/*
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* Displays plot files on a AED512 graphics terminal.
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*/
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#include "aed.h"
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char dbuf[BUFSIZ]; /* Used to buffer display characters */
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struct sgttyb sgttyb; /* Used to save terminal control bits */
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curx, cury; /* Current screen position */
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int xbot, ybot; /* Coordinates of screen lower-left corner */
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int scale; /* The number of pixels per 2**12 units
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* of world coordinates.
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*/
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/*
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* The following is the color map, containing reg, green, and blue
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* values for color locations 0 and 1.
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*/
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static int colors[] = {200, 200, 200, 0, 0, 125, 125, 0, 0, 125, 0, 0};
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/*---------------------------------------------------------
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* Openpl initializes the graphics display and clears its screen.
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*
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* Results: None.
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*
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* Side Effects:
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* The display is re-initialized and the file is remembered for
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* use in all subsequent calls to this module. The display's
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* color map is reset. The display is put into raw mode, but
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* the previous mode bits are saved.
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*
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* Errors: None.
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*---------------------------------------------------------
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*/
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openpl()
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{
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int flags, *p, i;
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char dum[4];
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/* First, grab up the display modes, then reset them to put it
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* into cooked mode. Also, lock the terminal.
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*/
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(void) gtty(fileno(stdout), &sgttyb);
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flags = sgttyb.sg_flags;
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sgttyb.sg_flags = (sgttyb.sg_flags & ~(RAW | CBREAK)) | EVENP | ODDP;
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(void) stty(fileno(stdout), &sgttyb);
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sgttyb.sg_flags = flags;
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/* Save the file pointer around for later use, then output an
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* initialization string to the display. The initialization
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* string resets the terminal, sets formats, clears the display,
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* initializes the read and write masks, and sets the color map.
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*/
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setbuf(stdout, dbuf);
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fputs("\33\33G1HHHN[00LFFCFFMFFFFFFFF", stdout);
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fputs("K0004", stdout);
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p = colors;
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for (i=0; i<12; i++)
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{
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chex(*p++, dum, 2);
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fputs(dum, stdout);
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}
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fputs("^15060AL", stdout);
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scale = 1<<12;
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curx = cury = xbot = ybot = 0;
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(void) fflush(stdout);
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}
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