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/* Copyright (c) 1987 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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/* |
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* aed.c - driver for AED 512 terminal. |
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* |
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* 2/2/87 |
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*/ |
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|
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#include <stdio.h> |
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|
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#include "driver.h" |
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|
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#include "color.h" |
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|
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|
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/* AED command characters */ |
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|
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#define AEDFMT "1888N" /* Format string to send to AED */ |
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#define CSTAT 0100 /* Console status: lower case */ |
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#define SCT 75 /* Set color lookup table */ |
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#define SEC 67 /* Set color for vector drawing */ |
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#define MOV 81 /* Set CAP (current access pointer) to x, y */ |
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#define OPT 40 /* Miscellaneous terminal control */ |
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#define SEN 71 /* Set encoding types */ |
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#define RST 48 /* Reset terminal */ |
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#define FFD 12 /* Clear screen */ |
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#define EJC 85 /* Enable Joystick cursor positioning */ |
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#define DJC 100 /* Disable Joystick cursor positioning */ |
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#define SCC 99 /* Set Cursor Colors */ |
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#define SCP 93 /* Set Cursor Parameters */ |
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#define DFR 111 /* Draw Filled Rectangle */ |
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#define RCP 106 /* Read Cursor Position */ |
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#define ESC 27 /* Escape starts a command sequence */ |
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#define SCS 96 /* Set Console Status */ |
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#define END 1 /* Ctrl-A used to terminate command mode */ |
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|
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#define BLK 0 /* color table entry for black */ |
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#define WHT 7 /* color table entry for white */ |
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|
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#define command(c) (putc(ESC, stdout), putc(c, stdout)) |
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#define byte(b) putc(b, stdout) |
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#define string(s) fputs(s, stdout) |
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#define flush() fflush(stdout) |
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|
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#define GAMMA 2.0 /* exponent for color correction */ |
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|
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#define MINCOLOR 8 /* start of device color table */ |
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|
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#define NCOLORS 241 /* our color table size (prime) */ |
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|
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#define hashcolr(c) ((67*(c)[RED]+59*(c)[GRN]+71*(c)[BLU])%NCOLORS) |
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|
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#define NCOLS 512 /* maximum # columns for output */ |
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#define NROWS 512-COMHT /* maximum # rows for output */ |
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#define COMHT 16 /* height of command line */ |
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#define COMCW 63 /* maximum chars on command line */ |
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|
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static COLR colrmap[256]; /* our color map */ |
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|
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static COLR colrtbl[NCOLORS]; /* our color table */ |
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|
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static int colres = 64; /* color resolution */ |
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|
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int aed_close(), aed_clear(), aed_paintr(), |
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aed_getcur(), aed_comout(), aed_errout(); |
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|
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static struct driver aed_driver = { |
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aed_close, aed_clear, aed_paintr, aed_getcur, |
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aed_comout, NULL, |
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NCOLS, NROWS |
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}; |
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|
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|
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struct driver * |
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aed_init(name) /* open AED */ |
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char *name; |
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{ |
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if (ttyset(&aed_driver, fileno(stdin)) < 0) { /* set tty driver */ |
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stderr_v("cannot access terminal\n"); |
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return(NULL); |
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} |
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command(RST); /* reset AED */ |
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longwait(2); |
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command(OPT); |
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byte(6); byte(1); /* AED command set */ |
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command(SEN); |
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string(AEDFMT); |
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command(SCS); /* set console status */ |
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byte(CSTAT); |
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command(SCC); /* set cursor type */ |
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byte(BLK); byte(WHT); byte(15); |
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command(SCP); |
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byte('+'); byte(0); byte(1); |
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errvec = aed_errout; /* set error vector */ |
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cmdvec = aed_errout; |
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if (wrnvec != NULL) |
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wrnvec = aed_errout; |
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return(&aed_driver); |
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} |
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|
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|
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static |
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aed_close() /* close AED */ |
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{ |
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errvec = stderr_v; /* reset error vector */ |
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cmdvec = NULL; |
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if (wrnvec != NULL) |
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wrnvec = stderr_v; |
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aedsetcap(0, 0); /* go to bottom */ |
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command(SEC); |
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byte(WHT); /* white text */ |
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byte(END); |
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byte('\n'); /* scroll */ |
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flush(); |
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ttydone(); |
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} |
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|
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|
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static |
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aed_clear(x, y) /* clear AED */ |
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int x, y; |
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{ |
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command(FFD); |
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flush(); |
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makemap(); /* init color map */ |
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} |
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|
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|
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static |
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aed_paintr(col, xmin, ymin, xmax, ymax) /* paint a rectangle */ |
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COLOR col; |
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int xmin, ymin, xmax, ymax; |
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{ |
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int ndx; |
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|
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if ((ndx = colindex(col)) < 0) { /* full table? */ |
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colres >>= 1; |
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redraw(); |
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return; |
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} |
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command(SEC); /* draw rectangle */ |
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byte(ndx+MINCOLOR); |
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aedsetcap(xmin, ymin+COMHT); |
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command(DFR); |
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aedcoord(xmax-1, ymax+(-1+COMHT)); |
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flush(); |
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} |
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|
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|
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static int |
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aed_getcur(xp, yp) /* get cursor position */ |
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int *xp, *yp; |
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{ |
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int com; |
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|
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command(EJC); /* enable cursor */ |
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com = getch(); /* get key */ |
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command(DJC); /* disable cursor */ |
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aedgetcap(xp, yp); /* get cursor position */ |
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*yp -= COMHT; /* convert coordinates */ |
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return(com); /* return key hit */ |
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} |
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|
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|
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static |
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aed_comout(out) /* output to command line */ |
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register char *out; |
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{ |
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static int newl = 1; |
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static int inmsg = 0; |
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|
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while (*out) { |
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if (newl) { /* new line */ |
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command(SEC); |
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byte(BLK); |
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aedsetcap(0, 0); |
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command(DFR); |
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aedcoord(NCOLS-1, COMHT-1); |
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aedsetcap(1, 4); |
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command(SEC); /* white text */ |
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byte(WHT); |
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byte(END); |
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newl = 0; |
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} |
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switch (*out) { |
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case '\n': /* end of line */ |
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newl = 1; |
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/* fall through */ |
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case '\r': |
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inmsg = 0; |
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byte('\r'); |
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break; |
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case '\b': /* back space */ |
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if (inmsg > 0 && --inmsg < COMCW) |
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byte('\b'); |
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break; |
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default: /* character */ |
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if (inmsg++ < COMCW) |
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byte(*out); |
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break; |
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} |
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out++; |
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} |
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flush(); |
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} |
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|
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|
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static |
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aed_errout(msg) /* print an error message */ |
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char *msg; |
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{ |
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aed_comout(msg); |
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if (*msg && msg[strlen(msg)-1] == '\n') |
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longwait(2); |
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} |
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|
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|
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/* |
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* aedsetcap - sets AED's current access pointer to (x, y). |
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*/ |
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|
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static |
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aedsetcap(x, y) |
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register int x, y; |
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{ |
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command(MOV); |
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aedcoord(x, y); |
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} |
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|
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/* |
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* aedcoord - puts out an (x, y) coordinate in AED 8 bit format. |
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*/ |
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|
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static |
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aedcoord(x, y) |
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register int x, y; |
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{ |
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byte(((x >> 4) & 0x30) | ((y >> 8) & 0x3)); |
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byte(x & 0xff); |
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byte(y & 0xff); |
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} |
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|
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|
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static |
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aedgetcap(xp, yp) /* get cursor postion */ |
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int *xp, *yp; |
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{ |
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register int c; |
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/* get cursor postition */ |
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command(RCP); |
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flush(); |
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c = getch(); |
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*xp = (c & 0x30) << 4; |
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*yp = (c & 0x3) << 8; |
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*xp |= getch(); |
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*yp |= getch(); |
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} |
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|
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|
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static int |
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colindex(col) /* return table index for color */ |
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COLOR col; |
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{ |
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static COLR clr; |
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int hval; |
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register int ndx, i; |
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|
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mapcolor(clr, col); |
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|
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hval = ndx = hashcolr(clr); |
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|
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for (i = 1; i < NCOLORS; i++) { |
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if (colrtbl[ndx][EXP] == 0) { |
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colrtbl[ndx][RED] = clr[RED]; |
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colrtbl[ndx][GRN] = clr[GRN]; |
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colrtbl[ndx][BLU] = clr[BLU]; |
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colrtbl[ndx][EXP] = COLXS; |
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newcolr(ndx, clr); |
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return(ndx); |
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} |
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if ( colrtbl[ndx][RED] == clr[RED] && |
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colrtbl[ndx][GRN] == clr[GRN] && |
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colrtbl[ndx][BLU] == clr[BLU] ) |
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return(ndx); |
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ndx = (hval + i*i) % NCOLORS; |
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} |
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return(-1); |
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} |
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|
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|
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static |
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newcolr(index, clr) /* enter a color into our table */ |
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int index; |
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COLR clr; |
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{ |
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command(SCT); |
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byte(index+MINCOLOR); |
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byte(1); |
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byte(clr[RED]); |
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byte(clr[GRN]); |
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byte(clr[BLU]); |
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flush(); |
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} |
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|
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|
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static |
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mapcolor(clr, col) /* map to our color space */ |
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COLR clr; |
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COLOR col; |
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{ |
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register int i, p; |
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/* compute color table value */ |
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for (i = 0; i < 3; i++) { |
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p = colval(col,i) * 256.0; |
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if (p < 0) p = 0; |
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else if (p >= 256) p = 255; |
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clr[i] = colrmap[p][i]; |
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} |
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clr[EXP] = COLXS; |
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} |
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|
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|
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static |
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makemap() /* initialize the color map */ |
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{ |
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double pow(); |
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int val; |
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register int i; |
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|
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for (i = 0; i < 256; i++) { |
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val = pow(i/256.0, 1.0/GAMMA) * colres; |
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val = (val*256 + 128) / colres; |
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colrmap[i][RED] = colrmap[i][GRN] = colrmap[i][BLU] = val; |
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colrmap[i][EXP] = COLXS; |
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} |
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for (i = 0; i < NCOLORS; i++) |
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colrtbl[i][EXP] = 0; |
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} |
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|
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|
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static |
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longwait(t) /* longer wait */ |
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int t; |
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{ |
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flush(); |
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sleep(t); |
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} |
