/*********************************************************************** Module: Xwin.c Copyright (C) 1996 Harold Youngren, Mark Drela This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. Report problems to: guppy@maine.com or drela@mit.edu ***********************************************************************/ /*********************************************************************** * Xplot11 C-level X11 interface C Version 4.46 11/28/01 * * Defines graphics primitives for window management and line drawing * Primitives include: * gwxrevflag - checks environment variables for background color * gwxopen - initializes X display and returns size and depth of display * gwxwinopen - opens X plotting window with specified x,y size and position * gwxclear - clears plotting window * gwxstatus - gets current window size and location * gwxresize - resizes current window to specified size * gwxreset - resets plotting defaults for window * gwxclose - closes plotting to X display * gwxflush - flushes out graphics primitives in buffers * gwxline - plots line segment * gwxdash - sets line pattern from integer mask * gwxcurs - gets graphics cursor position and key pressed * gwxpen - sets line width in pixels * * More advanced routines beyond the original PLOT-10 requirements * gwxdestroy - closes plot window * gwxlinez - plots polyline * gwxpoly - plots filled polygon * gwxstring - plots string * * Color routines * gwxsetcolor - sets foreground color from color map * gwxsetbgcolor - sets background color from color map * gwxcolorname2rgb - find color components of color specified by name string * gwxallocrgbcolor - allocate a color specified by r,g,b components * gwxfreecolor - frees an allocated color from colormap * * Utility routines * mskbits - converts integer mask into dot/dash array * * Double-buffer routines * gwxdisplaybuffer - switches background buffer with foreground window * gwxdrawtobuffer - sets drawing to background buffer * gwxdrawtowindow - sets drawing to foreground window ************************************************************************/ #include #include #include #include #include #include /* Handle various system requirements for trailing underscores, or other fortran-to-C interface shenanigans thru defines for routine names The provided set gives the option of setting a compile flag -DUNDERSCORE to include underscores on C routine name symbols */ #ifdef UNDERSCORE #define MSKBITS mskbits_ #define GWXREVFLAG gwxrevflag_ #define GWXOPEN gwxopen_ #define GWXWINOPEN gwxwinopen_ #define GWXCLEAR gwxclear_ #define GWXSTATUS gwxstatus_ #define GWXRESIZE gwxresize_ #define GWXRESET gwxreset_ #define GWXCLOSE gwxclose_ #define GWXFLUSH gwxflush_ #define GWXLINE gwxline_ #define GWXDASH gwxdash_ #define GWXCURS gwxcurs_ #define GWXPEN gwxpen_ #define GWXDESTROY gwxdestroy_ #define GWXLINEZ gwxlinez_ #define GWXPOLY gwxpoly_ #define GWXSTRING gwxstring_ #define GWXSETCOLOR gwxsetcolor_ #define GWXSETBGCOLOR gwxsetbgcolor_ #define GWXCOLORNAME2RGB gwxcolorname2rgb_ #define GWXALLOCRGBCOLOR gwxallocrgbcolor_ #define GWXFREECOLOR gwxfreecolor_ #define GWXDISPLAYBUFFER gwxdisplaybuffer_ #define GWXDRAWTOBUFFER gwxdrawtobuffer_ #define GWXDRAWTOWINDOW gwxdrawtowindow_ #else #define MSKBITS mskbits #define GWXREVFLAG gwxrevflag #define GWXOPEN gwxopen #define GWXWINOPEN gwxwinopen #define GWXCLEAR gwxclear #define GWXSTATUS gwxstatus #define GWXRESIZE gwxresize #define GWXRESET gwxreset #define GWXCLOSE gwxclose #define GWXFLUSH gwxflush #define GWXLINE gwxline #define GWXDASH gwxdash #define GWXCURS gwxcurs #define GWXPEN gwxpen #define GWXDESTROY gwxdestroy #define GWXLINEZ gwxlinez #define GWXPOLY gwxpoly #define GWXSTRING gwxstring #define GWXSETCOLOR gwxsetcolor #define GWXSETBGCOLOR gwxsetbgcolor #define GWXCOLORNAME2RGB gwxcolorname2rgb #define GWXALLOCRGBCOLOR gwxallocrgbcolor #define GWXFREECOLOR gwxfreecolor #define GWXDISPLAYBUFFER gwxdisplaybuffer #define GWXDRAWTOBUFFER gwxdrawtobuffer #define GWXDRAWTOWINDOW gwxdrawtowindow #endif /* Maximum number of polyline points per polyline call, increase if necessary */ #define MAXPTS 1000 #define argc 0 #define argv (char **) NULL Display *display; Window window; Pixmap pixmap; Drawable buffer; Cursor cursor; GC gc; unsigned long fgcolor, bgcolor; int height, width; int line_width; int root_width, root_height, root_depth; int reversevideo; static Window parent_window; Colormap cmap; void MSKBITS(int*,int*,int*); /**********************************************************************/ /* gwxrevflag Get XPLOT11 background default from users environment Parameters: revflag (int*) reverse video flag (0 for white, 1 for black) */ void GWXREVFLAG(revflag) int *revflag; { char *bufp, *tmp; /* check environment variable XPLOT11_BACKGROUND for background color XPLOT11_BACKGROUND = white gives black on white plotting (like paper) XPLOT11_BACKGROUND != white gives white on black plotting (reverse video) */ *revflag = 1; bufp = getenv("XPLOT11_BACKGROUND"); /* check lowercased environment for "white" for non-reverse video */ if(bufp) { for(tmp = bufp; *tmp; tmp++) *tmp = tolower(*tmp); *revflag = (strcmp(bufp,"white")!=0); } } /* gwxopen Open X window display and get size and depth of root window Parameters: xsize,ysize (int*) desired window size idepth (int*) screen color depth (pixel depth) revflag (int*) reverse video flag */ void GWXOPEN(xsizeroot, ysizeroot, depth) int *xsizeroot, *ysizeroot, *depth; { int revert,i; /* check environment variables for default background color XPLOT11_BACKGROUND != black gives black on white plotting (like paper) XPLOT11_BACKGROUND = black gives white on black plotting (reverse video) */ GWXREVFLAG(&reversevideo); /* open the display */ display = XOpenDisplay(NULL); /* XSynchronize(display,1); */ if (display == NULL) {printf(" Cannot open display...aborting\n"); exit(1); } /* get old window focus to use later for cursor positioning */ XGetInputFocus(display,&parent_window,&revert); /* get root window size and depth attributes */ root_width = DisplayWidth(display, DefaultScreen(display)); root_height = DisplayHeight(display, DefaultScreen(display)); root_depth = DefaultDepth(display, DefaultScreen(display)); *xsizeroot = root_width; *ysizeroot = root_height; *depth = root_depth; } /* gwxwinopen Open window of specified size and position, return size and depth Parameters: xstart,ystart (int*) upper left corner coordinates in root xsize,ysize (int*) desired window size */ void GWXWINOPEN(xstart, ystart, xsize, ysize) int *xstart, *ystart, *xsize, *ysize; { XSizeHints hints; XSetWindowAttributes wattrib; unsigned long wattrib_mask; int x,y,win_x,win_y; unsigned long pixel_white,pixel_black; XEvent event; XColor fgcurs, bgcurs; Font font; XGCValues gcv; unsigned long gcv_mask; char *fontname = "6x12"; /* Define a crosshair cursor */ Pixmap curs; unsigned int curs_width=16; unsigned int curs_height=16; unsigned int curs_x_hot=7; unsigned int curs_y_hot=8; /* Was: curs_y_hot=7 MD 3/12/96 */ static unsigned char curs_bits[] = { 0x80,0x00,0x80,0x00,0x80,0x00,0x80,0x00, 0x80,0x00,0x80,0x00,0x80,0x00,0xff,0x7f, 0x80,0x00,0x80,0x00,0x80,0x00,0x80,0x00, 0x80,0x00,0x80,0x00,0x80,0x00,0x00,0x00 }; /* check for open display */ if (display == NULL) {printf(" Cannot open display...aborting in gwxwinopen\n"); exit(1); } width = *xsize; height = *ysize; /* printf("gwxwinopen size x %d y %d \n",width,height); */ /* set up window attributes and create window */ pixel_white = WhitePixel(display, DefaultScreen(display)); pixel_black = BlackPixel(display, DefaultScreen(display)); if(reversevideo) { fgcolor = pixel_white; bgcolor = pixel_black; } else { fgcolor = pixel_black; bgcolor = pixel_white; } /* define a colormap and window attributes*/ cmap = DefaultColormap(display, DefaultScreen(display)); wattrib.colormap = cmap; wattrib.background_pixel = bgcolor; wattrib.border_pixel = fgcolor; wattrib.event_mask = ExposureMask | ConfigureNotify | KeyPressMask | ButtonPressMask; wattrib_mask = CWColormap | CWEventMask | CWBackPixel | CWBorderPixel; /* Use backing store (if Expose events are to regen the display, comment out these references to backing store */ wattrib.backing_store = WhenMapped; wattrib.backing_planes = AllPlanes; wattrib.bit_gravity = SouthWestGravity; wattrib.win_gravity = NorthWestGravity; wattrib_mask = wattrib_mask | CWBitGravity | CWBackingStore | CWWinGravity | CWBackingPlanes; /* create the window using these parameters */ window = XCreateWindow(display, DefaultRootWindow(display), *xstart, *ystart, width, height, 2, root_depth, InputOutput, CopyFromParent, wattrib_mask, &wattrib); /* Set pixmap initally pointing to NULL to indicate it is yet not created to do double buffering */ pixmap = (Pixmap) NULL; /* set initial drawing destination to foreground window */ buffer = window; /* set up interaction with the window manager */ hints.flags = USPosition | USSize; hints.width = width; hints.height = height; hints.x = *xstart; hints.y = *ystart; XSetNormalHints(display, window, &hints); XSetStandardProperties(display, window, "Xplot11\0", "Xplot11\0", None, argv, argc, &hints); /* set up cursor */ fgcurs.pixel = fgcolor; bgcurs.pixel = bgcolor; XQueryColor(display,cmap,&fgcurs); XQueryColor(display,cmap,&bgcurs); if((curs=XCreateBitmapFromData(display,window,(char*) curs_bits, curs_width,curs_height))!= None) { cursor = XCreatePixmapCursor(display,curs,curs, &fgcurs,&bgcurs,curs_x_hot,curs_y_hot); } else { cursor = XCreateFontCursor(display,XC_draft_small); }; XDefineCursor(display, window, cursor); XRecolorCursor(display, cursor, &fgcurs, &bgcurs); /* create the gc */ line_width = 0; gcv.function = GXcopy; gcv.foreground = fgcolor; gcv.background = bgcolor; gcv.line_width = line_width; gcv.line_style = LineSolid; gcv.cap_style = CapButt; gcv.fill_style = FillSolid; gcv.join_style = JoinMiter; gcv_mask = GCFunction | GCForeground | GCBackground | GCLineWidth | GCLineStyle | GCCapStyle | GCFillStyle | GCJoinStyle; gc = XCreateGC(display, window, gcv_mask, &gcv); /* load the font */ font = XLoadFont(display, fontname); XSetFont(display, gc, font); /* map the window and wait for an expose event to proceed */ XMapWindow(display, window); while(1) { XNextEvent(display, &event); if(event.type==Expose) break; } /* clear the window */ /* XClearWindow(display,window); */ } /* gwxclear Clear current plot window Parameters: None */ void GWXCLEAR() { if(buffer == window) { XClearWindow(display,window); /* printf("clearing window\n"); */ } else { XSetForeground(display, gc, bgcolor); XFillRectangle(display, buffer, gc, 0, 0, width, height); XSetForeground(display, gc, fgcolor); /* printf("clearing buffer\n"); */ }; } /* gwxstatus Return current window status (position, size) Parameters: xstart,ystart (int*) upper left corner coordinates in root xsize,ysize (int*) desired window size */ void GWXSTATUS(xstart, ystart, xsize, ysize) int *xstart, *ystart, *xsize, *ysize; { XWindowAttributes xwa; Window w_root, w_parent, *w_children; unsigned int nchildren; XGetWindowAttributes(display, window, &xwa); *xsize = xwa.width; *ysize = xwa.height; *xstart = xwa.x; *ystart = xwa.y; /* printf("gwxstatus size x %d y %d \n",*xsize,*ysize); */ /* Position of window is meaningless under window manager, which remaps each window under a new parent. Find parent, if not root, get the parent's position */ if(XQueryTree(display,window,&w_root,&w_parent,&w_children,&nchildren)) { XFree((void*) w_children); /* Free the list of child windows */ if(w_parent!=DefaultRootWindow(display)) { XGetWindowAttributes(display, w_parent, &xwa); *xstart = xwa.x; *ystart = xwa.y; } } } /* gwxclose Close current windows, buffers and display Parameters: None */ void GWXCLOSE() { XFreeCursor(display, cursor); XFreeGC(display, gc); if(pixmap != (Pixmap) NULL) XFreePixmap(display, pixmap); XCloseDisplay(display); } /* gwxdestroy Close current window and display Parameters: None */ void GWXDESTROY() { XDestroyWindow(display,window); } /* gwxflush Flush all pending graphics requests to the screen Parameters: None */ void GWXFLUSH() { if(buffer == pixmap) { XCopyArea(display, pixmap, window, gc, 0, 0, width, height, 0, 0); /* printf("copying pixmap to window x %d y %d\n",width,height); */ }; XFlush(display); } /* gwxdisplaybuffer Switches background buffer onto foreground window, displaying accumulated graphics Parameters: None */ void GWXDISPLAYBUFFER() { GWXFLUSH(); } /* gwxdrawtobuffer Switches graphics to draw to the background buffer Parameters: None */ void GWXDRAWTOBUFFER() { /* create and clear the pixmap */ if(pixmap == (Pixmap) NULL) { pixmap = XCreatePixmap(display, window, width, height, root_depth); XSetForeground(display, gc, bgcolor); XFillRectangle(display, pixmap, gc, 0, 0, width, height); XSetForeground(display, gc, fgcolor); } /* point graphics to the pixmap */ buffer = pixmap; /* printf("called gwxdrawtobuffer\n"); */ } /* gwxdrawtowindow Switches graphics to draw to the foreground window Parameters: None */ void GWXDRAWTOWINDOW() { buffer = window; /* printf("called gwxdrawtowindow\n"); */ } /* gwxline Draw line from x1,y1 to x2,y2 Parameters: x1,y1 (int*) starting position for line x2,y2 (int*) ending position for line */ void GWXLINE(x1, y1, x2, y2) int *x1, *y1, *x2, *y2; { XDrawLine(display, buffer, gc, *x1, *y1, *x2, *y2); } /* gwxresize Resize screen window to x width, y height Parameters: x (int*) new width y (int*) new height */ void GWXRESIZE(x, y) int *x, *y; { unsigned int xsiz, ysiz; unsigned int xsize, ysize, xstart, ystart; int i; XEvent event; long event_mask; /* printf("called gwxresize\n"); */ event_mask = ExposureMask | ResizeRedirectMask; /* Clear the window events before resizing to setup for post resize Expose */ while(XPending(display)) XNextEvent(display, &event); xsiz = *x; ysiz = *y; /* printf("gwxresize to x %d y %d\n",xsiz,ysiz); */ XResizeWindow(display, window, xsiz, ysiz); XMapRaised(display, window); XFlush(display); /* check for window size change */ i = 0; while(1) { GWXSTATUS(&xstart, &ystart, &xsize, &ysize); if( (xsize==xsiz) && (ysize==ysiz) ) break; /* printf("resize status check count = %d\n",i++); */ } /* update window size */ width = xsiz; height = ysiz; /* destroy old back buffer pixmap and create new one in proper size */ if(pixmap != (Pixmap) NULL) { XFreePixmap(display, pixmap); /* printf("create new pixmap sized to x %d y %d\n",width,height); */ pixmap = XCreatePixmap(display, window, width, height, root_depth); if(buffer != window) buffer = pixmap; /* clear the pixmap */ XSetForeground(display, gc, bgcolor); XFillRectangle(display, pixmap, gc, 0, 0, width, height); XSetForeground(display, gc, fgcolor); } /* Raise the window and wait for an expose event to do anything in it */ /* while(1) { XWindowEvent(display, window, event_mask, &event); switch(event.type) { case Expose: printf("Expose event \n"); break; case NoExpose: printf("NoExpose event \n"); break; case ResizeRequest: printf("resizerequest event \n"); break; } } */ } /* gwxlinez Draw polyline on display window in current color and pen Parameters: ix (int*) array of x coordinates on polyline iy (int*) array of y coordinates on polyline n (int*) number of coordinate points (see define for MAXPTS at start of this file) */ void GWXLINEZ(ix, iy, n) int *n, *ix, *iy; { XPoint points[MAXPTS]; int i; if (*n > MAXPTS) { fprintf(stderr,"Xplot11.gwxlinez: Too many points in polyline\n"); printf("Xplot11.gwxlinez: Too many points in polyline\n"); return; } for(i=0; i < *n; i++) { points[i].x = ix[i]; points[i].y = iy[i]; /* printf("gwxlinez x %d y %d \n",ix[i],iy[i]); */ } XDrawLines(display, buffer, gc, points, *n, CoordModeOrigin); } /* gwxpoly Draw filled polyline on display window in current color and pen Parameters: x_coord (int*) array of x coordinates on polyline y_coord (int*) array of y coordinates on polyline n_coord (int*) number of coordinate points (see define for MAXPTS at start of this file) */ void GWXPOLY(x_coord, y_coord, n_coord) int *x_coord, *y_coord, *n_coord; { XPoint points[MAXPTS]; int i,n; if (*n_coord >= MAXPTS) { fprintf(stderr,"Xplot11.gwxpoly: Too many points in polyline\n"); printf("Xplot11.gwxpoly: Too many points in polyline\n"); return; } for (i=0; i < *n_coord; i++) { points[i].x = x_coord[i]; points[i].y = y_coord[i]; } n = *n_coord; /* if the polyline is not closed, duplicate first point to ensure closed perimeter (speeds up X graphics drastically) */ if ( (points[n-1].x != points[0].x) || (points[n-1].y != points[0].y) ) { points[n].x = points[0].x; points[n].y = points[0].y; n++; } XFillPolygon(display, buffer, gc, points, n, Nonconvex, CoordModeOrigin); } /* gwxsetcolor Set foreground color to pixel value Parameters: pixel (int*) pixel value (mapped in colormap) */ void GWXSETCOLOR(pixel) int *pixel; { fgcolor = *pixel; XSetForeground(display, gc, fgcolor); } /* gwxsetbgcolor Set background color to pixel value Parameters: pixel (int*) pixel value (mapped in colormap) */ void GWXSETBGCOLOR(pixel) int *pixel; { bgcolor = *pixel; XSetForeground(display, gc, bgcolor); } /* gwxcolorname2rgb Find r,g,b components for color specified by name string Parameters: red,grn,blu (int*) output color components (0-255) nc (int*) string length (# of chars) colorname (char*) string containing name of valid color Note: color names are not case sensitive len (int) fortran appended string length (passed by value) Valid color names are any color name that is known to X11 color database Examples are "Black","White","Yellow","Orange","Red","Green", "Cyan","Blue","Magenta", "ivory", etc. */ void GWXCOLORNAME2RGB(int *red, int *grn, int *blu, int *nc, char *colorname, int len) { XColor color_def; char cname[32]; int i,n; n = *nc; /* copy string to avoid overwriting possibly static input string Note that string length is explicitly passed to avoid compatibility problems with by fortran character arg length */ if(n>31) { n = 31; fprintf(stderr,"Xplot11.gwxcolorname2rgb: color name '%s' truncated\n", cname); printf("Xplot11.gwxcolorname2rgb: color name '%s' truncated\n",cname); } strncpy(cname,colorname,n); cname[n] = '\0'; *red = -1; *grn = -1; *blu = -1; if (!XParseColor(display, cmap,cname,&color_def)) { fprintf(stderr,"Xplot11.gwxcolorname2rgb: color name '%s' not found\n", cname); printf("Xplot11.gwxcolorname2rgb: color name '%s' not found\n",cname); return; } *red = color_def.red /256; *grn = color_def.green/256; *blu = color_def.blue /256; } /* gwxallocrgbcolor Allocate a color in colormap specified by r,g,b components Parameters: red,grn,blu (int*) input color components (0-255) ic (int*) returned color index or pixel value */ void GWXALLOCRGBCOLOR(int *red, int *grn, int *blu, int *ic) { XColor color_def; color_def.red = *red * 256; color_def.green = *grn * 256; color_def.blue = *blu * 256; *ic = -1; if (!XAllocColor (display, cmap, &color_def)) { fprintf (stderr,"Xplot11.gwxallocrgbcolor: can't allocate color.\n"); printf ("Xplot11.gwxallocrgbcolor: can't allocate color.\n"); return; } *ic = color_def.pixel; } /* gwxfreecolor Free a color from color map Parameters: pix (int*) pixel in colormap */ void GWXFREECOLOR(int *pix) { unsigned long lpix; lpix = *pix; XFreeColors(display,cmap,&lpix,1,0L); } /* gwxstring Draw string on display at specified position in current font and color Parameters: x (int*) array of x coordinates on polyline y (int*) array of y coordinates on polyline string (char*) character string length (int*) length of string */ void GWXSTRING(x, y, string, length) int *x, *y, *length; char *string; { XDrawString(display, buffer, gc, *x, *y, string, *length); } /* gwxdash Set line drawing pattern to mask pattern Parameters: mask (int*) integer mask value (bits set pen pattern for lines) */ void GWXDASH(int* lmask) { char dashes[16]; int idash[16], nchrs, ioff, i; if(*lmask==0) XSetLineAttributes(display, gc, line_width, LineSolid, CapButt, JoinMiter); else if(*lmask==-1) XSetLineAttributes(display, gc, line_width, LineSolid, CapButt, JoinMiter); else { (void) MSKBITS(lmask,idash,&nchrs); for(i=1;i<=nchrs;i++) dashes[i-1]=idash[i-1]; /* for(i=1;i<=nchrs;i++) printf("%d dashes %d\n",i,dashes[i-1]); */ ioff = 0; XSetDashes(display, gc, ioff, dashes, nchrs); /* use LineOnOffDash to only write "on" pixels in dashed lines (fg only) */ /* use LineDoubleDash to overwrite all pixels in dashed lines (fg AND bg) */ XSetLineAttributes(display, gc, line_width, LineOnOffDash, CapButt, JoinMiter); } } /* gwxreset Reset graphics context to default Parameters: None */ void GWXRESET() { XGCValues gcv; unsigned long gcv_mask; line_width = 0; gcv.function = GXcopy; gcv.foreground = fgcolor; gcv.background = bgcolor; gcv.line_width = line_width; gcv.line_style = LineSolid; gcv.cap_style = CapButt; gcv.fill_style = FillSolid; gcv.join_style = JoinMiter; gcv_mask = GCFunction | GCForeground | GCBackground | GCLineWidth | GCLineStyle | GCCapStyle | GCFillStyle | GCJoinStyle; XChangeGC(display, gc, gcv_mask, &gcv); } /* gwxpen Set pen width for line drawing Parameters: ipen (int*) integer pen width */ void GWXPEN(int* ipen) { XGCValues gcv; unsigned long gcv_mask; line_width = *ipen; gcv.line_width = line_width; gcv.cap_style = CapButt; gcv.join_style = JoinMiter; gcv_mask = GCLineWidth | GCCapStyle | GCJoinStyle; XChangeGC(display, gc, gcv_mask, &gcv); } /* gwxcurs Get cursor position and key pressed (waits for keypress or buttonpress) Parameters: x (int*) output cursor x coordinate y (int*) output cursor y coordinate state (int*) key pressed */ void GWXCURS(x, y, state) int *x, *y, *state; { XEvent report; KeySym key; int count,buffer_len,last_event; long event_mask; char buffer[2]; /* int idev = 1; */ /* XRaiseWindow(display,window); */ /* XSetInputFocus(display,window,RevertToNone,CurrentTime); */ /* warp to passed-in x,y (typ. previous cursor location) */ /* printf("GWXCURS input x %d y %d\n",*x,*y); */ XWarpPointer(display, None, window, 0, 0, 0, 0, *x, *y); event_mask = ExposureMask | ConfigureNotify | KeyPressMask | ButtonPressMask; /* clear any pending events */ while(XPending(display)) XNextEvent(display, &report); *state = 0; last_event = 0; while(! *state) { XWindowEvent(display, window, event_mask, &report); switch(report.type) { case Expose: if(last_event != Expose) { /* replot_(&idev); */ XSetInputFocus(display,window,RevertToNone,CurrentTime); } break; case ConfigureNotify: break; case ButtonPress: *state = report.xbutton.button; *x = report.xbutton.x; *y = report.xbutton.y; break; case KeyPress: *x = report.xkey.x; *y = report.xkey.y; buffer_len = 1; count = XLookupString(&report.xkey, buffer, buffer_len, &key, NULL); if (count == 0) printf("gwxcurs: Zero length string returned.\n"); *state = key; break; } last_event = report.type; } /* XRaiseWindow(display,parent_window); */ /* XSetInputFocus(display,parent_window,RevertToNone,CurrentTime); */ } /* mskbits Utility routine to convert lower 16 bits of pattern mask into pattern array of on/off bit lengths. The 16 bits of ipat can contain up to 16 on/off bit lengths. i.e. 0XAAAAAAA produces ibits=(1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1) i.e. 0XCCCCCCC produces ibits=(2,2,2,2,2,2,2,2) The output pattern stored in integer array ibits=(#on,#off,#on,#off,etc.) Parameters: mask (int*) input mask ibits (int*) output pattern string (#on, #off...) ndash (int*) number of entries in pattern array */ void MSKBITS(int* mask, int* ibits, int* ndash) { #define BITSINMASK 16 /* use only lower 16 bits of mask word */ int i,ic,ibit,ibitold; int nbits, nshft; unsigned short lmask; /* shift mask until low bit is 1, filling high bits with 0's */ lmask = *mask; nshft = 0; if(lmask!=0) { while (!(ibitold = (lmask & 0x01))) lmask >>= 1; nshft++; } /* if no 1 bits just exit with no dashes set */ if(ibitold==0) { *ndash = 0; exit; } /* cycle through the lower 'length-nshft' bits checking for number of contiguous same bits, store into ibits array */ nbits = ic = 0; for (i=0; i<(BITSINMASK-nshft); ++i) { ibit=(lmask & 0x01); if(ibit != ibitold) { ibits[ic++] = nbits; nbits = 0; } ibitold = ibit; nbits++; lmask >>= 1; } /* add bits at end of shifted bits including any initial shift to find the first 1 in the low bit */ if(ibit==1) { ibits[ic++] = nbits; if(nshft>0) ibits[ic++] = nshft; } else ibits[ic++] = nbits + nshft; *ndash = ic; }