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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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* x10.c - driver for X-windows version 10.4 |
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* |
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* 5/7/87 |
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*/ |
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|
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#include <stdio.h> |
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|
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#include <sys/ioctl.h> |
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|
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#include <X/Xlib.h> |
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#include <X/cursors/bcross.cursor> |
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#include <X/cursors/bcross_mask.cursor> |
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|
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#include "color.h" |
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|
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#include "driver.h" |
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|
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#include "xtwind.h" |
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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 BORWIDTH 5 /* border width */ |
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#define BARHEIGHT 25 /* menu bar size */ |
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#define COMHEIGHT (COMLH*COMCH) /* command line height (pixels) */ |
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|
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#define COMFN "8x13" /* command line font name */ |
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#define COMLH 3 /* number of command lines */ |
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#define COMCW 8 /* approx. character width (pixels) */ |
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#define COMCH 13 /* approx. character height (pixels) */ |
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|
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#ifndef WFLUSH |
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#define WFLUSH 30 /* flush after this many rays */ |
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#endif |
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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 flush() while (XPending() > 0) getevent() |
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|
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#define levptr(etype) ((etype *)&thisevent) |
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|
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static char *clientname; /* calling client's name */ |
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|
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static XEvent thisevent; /* current event */ |
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|
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static int colres = 128; /* color resolution */ |
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static COLR colrmap[256]; /* our color mapping */ |
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|
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static int ncolors = 0; /* color table size */ |
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static COLR *colrtbl; /* our color table */ |
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static int *pixval; /* associated pixel values */ |
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|
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static Display *ourdisplay = NULL; /* our display */ |
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|
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static Window gwind = 0; /* our graphics window */ |
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|
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static Cursor pickcursor = 0; /* cursor used for picking */ |
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|
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static int gwidth = 0; /* graphics window width */ |
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static int gheight = 0; /* graphics window height */ |
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|
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static TEXTWIND *comline = NULL; /* our command line */ |
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|
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static int c_erase, c_kill; /* erase and kill characters */ |
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|
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static char c_queue[64]; /* input queue */ |
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static int c_first = 0; /* first character in queue */ |
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static int c_last = 0; /* last character in queue */ |
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|
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extern char *malloc(); |
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|
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int x_close(), x_clear(), x_paintr(), x_errout(), |
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x_getcur(), x_comout(), x_comin(); |
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|
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static struct driver x_driver = { |
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x_close, x_clear, x_paintr, x_getcur, |
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x_comout, x_comin, |
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MAXRES, MAXRES |
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}; |
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|
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|
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struct driver * |
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x_init(name) /* initialize driver */ |
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char *name; |
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{ |
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struct sgttyb ttymode; |
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|
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if (isatty(0)) { |
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ioctl(0, TIOCGETP, &ttymode); |
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c_erase = ttymode.sg_erase; |
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c_kill = ttymode.sg_kill; |
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} else { |
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c_erase = 'H'-'@'; |
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c_kill = 'U'-'@'; |
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} |
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ourdisplay = XOpenDisplay(NULL); |
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if (ourdisplay == NULL) { |
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stderr_v("cannot open X-windows; DISPLAY variable set?\n"); |
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return(NULL); |
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} |
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if (DisplayPlanes() < 4) { |
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stderr_v("not enough colors\n"); |
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return(NULL); |
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} |
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if (getmap() < 0) /* not fatal */ |
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stderr_v("cannot allocate colors\n"); |
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|
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pickcursor = XCreateCursor(bcross_width, bcross_height, |
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bcross_bits, bcross_mask_bits, |
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bcross_x_hot, bcross_y_hot, |
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BlackPixel, WhitePixel, GXcopy); |
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clientname = name; |
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x_driver.inpready = 0; |
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cmdvec = x_comout; /* set error vectors */ |
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if (wrnvec != NULL) |
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wrnvec = x_errout; |
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return(&x_driver); |
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} |
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|
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|
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static |
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x_close() /* close our display */ |
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{ |
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cmdvec = NULL; /* reset error vectors */ |
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if (wrnvec != NULL) |
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wrnvec = stderr_v; |
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if (ourdisplay == NULL) |
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return; |
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if (comline != NULL) { |
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xt_close(comline); |
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comline = NULL; |
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} |
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if (gwind != 0) { |
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XDestroyWindow(gwind); |
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gwind = 0; |
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gwidth = gheight = 0; |
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} |
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XFreeCursor(pickcursor); |
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freemap(); |
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XCloseDisplay(ourdisplay); |
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ourdisplay = NULL; |
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} |
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|
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|
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static |
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x_clear(xres, yres) /* clear our display */ |
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int xres, yres; |
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{ |
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if (xres != gwidth || yres != gheight) { /* new window */ |
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if (comline != NULL) |
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xt_close(comline); |
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if (gwind != 0) |
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XDestroyWindow(gwind); |
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gwind = XCreateWindow(RootWindow, 0, BARHEIGHT, |
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xres, yres+COMHEIGHT, BORWIDTH, |
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BlackPixmap, BlackPixmap); |
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if (gwind == 0) |
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goto fail; |
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comline = xt_open(gwind, 0, yres, xres, COMHEIGHT, 0, COMFN); |
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if (comline == NULL) |
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goto fail; |
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XMapWindow(gwind); |
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XSelectInput(gwind, |
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KeyPressed|ButtonPressed|ExposeWindow|ExposeRegion|UnmapWindow); |
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XStoreName(gwind, clientname); |
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gwidth = xres; |
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gheight = yres; |
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} else /* just clear */ |
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XClear(gwind); |
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newmap(); |
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flush(); |
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return; |
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fail: |
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stderr_v("Failure opening window in x_clear\n"); |
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quit(1); |
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} |
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|
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|
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static |
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x_paintr(col, xmin, ymin, xmax, ymax) /* fill 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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extern long nrays; /* global ray count */ |
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static long lastflush = 0; /* ray count at last flush */ |
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int ndx; |
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|
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if (ncolors > 0) { |
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if ((ndx = colindex(col)) < 0) { |
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colres >>= 1; |
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redraw(); |
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return; |
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} |
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XPixSet(gwind, xmin, gheight-ymax, xmax-xmin, ymax-ymin, |
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pixval[ndx]); |
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} |
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if (nrays - lastflush >= WFLUSH) { |
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flush(); /* also checks for input */ |
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lastflush = nrays; |
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} |
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} |
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|
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|
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static |
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x_comin(inp) /* read in a command line */ |
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char *inp; |
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{ |
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int x_getc(), x_comout(); |
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|
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xt_cursor(comline, TBLKCURS); |
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editline(inp, x_getc, x_comout, c_erase, c_kill); |
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xt_cursor(comline, TNOCURS); |
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} |
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|
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|
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static |
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x_comout(out) /* output a string to command line */ |
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char *out; |
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{ |
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if (comline != NULL) |
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xt_puts(out, comline); |
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} |
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|
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|
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static |
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x_errout(msg) /* output an error message */ |
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char *msg; |
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{ |
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x_comout(msg); |
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stderr_v(msg); /* send to stderr also! */ |
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} |
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|
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|
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static int |
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x_getcur(xp, yp) /* get cursor position */ |
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int *xp, *yp; |
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{ |
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while (XGrabMouse(gwind, pickcursor, ButtonPressed) == 0) |
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sleep(1); |
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XFocusKeyboard(gwind); |
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do |
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getevent(); |
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while (c_last <= c_first && levptr(XEvent)->type != ButtonPressed); |
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*xp = levptr(XKeyOrButtonEvent)->x; |
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*yp = gheight-1 - levptr(XKeyOrButtonEvent)->y; |
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XFocusKeyboard(RootWindow); |
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XUngrabMouse(); |
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flush(); /* insure release */ |
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if (c_last > c_first) /* key pressed */ |
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return(x_getc()); |
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/* button pressed */ |
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switch (levptr(XKeyOrButtonEvent)->detail & 0377) { |
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case LeftButton: |
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return(MB1); |
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case MiddleButton: |
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return(MB2); |
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case RightButton: |
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return(MB3); |
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} |
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return(ABORT); |
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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 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(ndx, clr) /* enter a color into hardware table */ |
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int ndx; |
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COLR clr; |
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{ |
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Color xcolor; |
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|
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xcolor.pixel = pixval[ndx]; |
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xcolor.red = clr[RED] << 8; |
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xcolor.green = clr[GRN] << 8; |
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xcolor.blue = clr[BLU] << 8; |
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|
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XStoreColor(&xcolor); |
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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) * 255.0 + 0.5; |
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if (p < 0) p = 0; |
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else if (p > 255) 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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getmap() /* get the color map */ |
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{ |
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int planes; |
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|
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for (ncolors=(1<<DisplayPlanes())-3; ncolors>12; ncolors=ncolors*.937){ |
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colrtbl = (COLR *)malloc(ncolors*sizeof(COLR)); |
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pixval = (int *)malloc(ncolors*sizeof(int)); |
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if (colrtbl == NULL || pixval == NULL) |
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return(-1); |
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if (XGetColorCells(0,ncolors,0,&planes,pixval) != 0) |
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return(0); |
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free((char *)colrtbl); |
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free((char *)pixval); |
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} |
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ncolors = 0; |
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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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freemap() /* free our color map */ |
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{ |
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if (ncolors == 0) |
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return; |
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XFreeColors(pixval, ncolors, 0); |
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free((char *)colrtbl); |
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free((char *)pixval); |
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ncolors = 0; |
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} |
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|
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|
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static |
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newmap() /* 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 int |
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x_getc() /* get a command character */ |
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{ |
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while (c_last <= c_first) { |
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c_first = c_last = 0; /* reset */ |
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getevent(); /* wait for key */ |
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} |
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x_driver.inpready--; |
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return(c_queue[c_first++]); |
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} |
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|
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|
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static |
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getevent() /* get next event */ |
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{ |
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XNextEvent(levptr(XEvent)); |
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switch (levptr(XEvent)->type) { |
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case KeyPressed: |
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getkey(levptr(XKeyPressedEvent)); |
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break; |
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case ExposeWindow: |
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if (ncolors == 0 && levptr(XExposeEvent)->subwindow == 0) |
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if (getmap() < 0) |
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stderr_v("cannot grab colors\n"); |
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else |
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newmap(); |
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/* fall through */ |
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case ExposeRegion: |
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fixwindow(levptr(XExposeEvent)); |
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break; |
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case UnmapWindow: |
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if (levptr(XUnmapEvent)->subwindow == 0) |
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freemap(); |
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break; |
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case ButtonPressed: /* handled in x_getcur() */ |
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break; |
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} |
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} |
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|
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|
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static |
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getkey(ekey) /* get input key */ |
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register XKeyPressedEvent *ekey; |
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{ |
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int n; |
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register char *str; |
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|
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str = XLookupMapping(ekey, &n); |
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while (n-- > 0 && c_last < sizeof(c_queue)) |
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c_queue[c_last++] = *str++; |
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x_driver.inpready = c_last - c_first; |
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} |
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|
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|
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static |
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fixwindow(eexp) /* repair damage to window */ |
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register XExposeEvent *eexp; |
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{ |
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if (eexp->subwindow == 0) |
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repaint(eexp->x, gheight - eexp->y - eexp->height, |
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eexp->x + eexp->width, gheight - eexp->y); |
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else if (eexp->subwindow == comline->w) |
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xt_redraw(comline); |
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} |
