main()
{
float llx,lly,urx,ury;
int width,height,i;
char buf[LBUF],string[256];
char *scalestring="0.88889 1.10769 scale\n"; /* 72/81, 72/65 */
Display *dpy;
XEvent ev;
GC gc;
Window win;
DPSContext ctxt;
/* open display */
if ((dpy=XOpenDisplay(NULL))==NULL) {
fprintf(stderr,"Cannot connect to display %s\n",
XDisplayName(NULL));
exit(-1);
}
/* determine window size */
fgets(buf,LBUF,stdin);
sscanf(buf,"%*s %s",string);
string[3] = '\0';
if (strcmp(string,"EPS")!=0) {
width = 612;
height = 792;
} else {
while(fgets(buf,LBUF,stdin)!=NULL) {
if (buf[0]!='%' || buf[1]!='%') continue;
sscanf(buf,"%s",string);
if (strcmp(string,"%%BoundingBox:")==0) {
sscanf(buf,"%*s %s",string);
if (strcmp(string,"(atend)")==0) {
width = 612;
height = 792;
} else {
sscanf(buf,"%*s %f %f %f %f",
&llx,&lly,&urx,&ury);
width = urx-llx;
height = ury-lly;
}
break;
} else if (strcmp(string,"%%EndComments")==0) {
width = 612;
height = 792;
break;
}
}
}
/* create and map window */
win = XCreateSimpleWindow(dpy,DefaultRootWindow(dpy),
100,100,width,height,1,
BlackPixel(dpy,DefaultScreen(dpy)),
WhitePixel(dpy,DefaultScreen(dpy)));
XMapWindow(dpy,win);
/* create graphics context */
gc = XCreateGC(dpy,RootWindow(dpy,DefaultScreen(dpy)),0,NULL);
XSetForeground(dpy,gc,BlackPixel(dpy,DefaultScreen(dpy)));
XSetBackground(dpy,gc,WhitePixel(dpy,DefaultScreen(dpy)));
/* create and set Display PostScript context */
ctxt = XDPSCreateSimpleContext(dpy,win,gc,0,height,
DPSDefaultTextBackstop,DPSDefaultErrorProc,NULL);
if (ctxt==NULL) {
fprintf(stderr,"Cannot create DPS context\n");
exit(-1);
}
DPSSetContext(ctxt);
DPSWaitContext(ctxt);
for (i=0; i<1000000; ++i); /* KLUDGE synchronization */
/* scale */
/* no longer necessary, as of AIX Version 3.003? */
/*
DPSWriteData(ctxt,scalestring,strlen(scalestring));
*/
/* read PostScript from standard input and write to window */
while (fgets(buf,LBUF,stdin)!=NULL) {
sscanf(buf,"%s",string);
if (strcmp(string,"showpage")==0) break;
DPSWriteData(ctxt,buf,strlen(buf));
}
DPSFlushContext(ctxt);
/* any key press to exit */
XSelectInput(dpy,win,KeyPressMask);
while(True) {
XNextEvent(dpy,&ev);
if (ev.type==KeyPress) break;
}
/* clean up */
DPSDestroySpace(DPSSpaceFromContext(ctxt));
XFlush(dpy);
}
main()
{
int llx,lly,urx,ury,width,height,
scrwidth,scrheight,scrwidthmm,scrheightmm;
float xres,yres;
char buf[LBUF];
Display *dpy;
int scr;
unsigned long black,white;
GC gcpix,gcwin;
Window win;
Pixmap pix;
XEvent ev;
DPSContext dps;
/* open display */
if ((dpy=XOpenDisplay(NULL))==NULL) {
fprintf(stderr,"Cannot connect to display %s\n",
XDisplayName(NULL));
exit(-1);
}
scr = DefaultScreen(dpy);
black = BlackPixel(dpy,scr);
white = WhitePixel(dpy,scr);
/* determine BoundingBox */
llx = LLX_DEFAULT;
lly = LLY_DEFAULT;
urx = URX_DEFAULT;
ury = URY_DEFAULT;
fgets(buf,LBUF,stdin);
if (strstr(buf,"EPS")!=NULL) {
while(fgets(buf,LBUF,stdin)!=NULL) {
if (buf[0]!='%' || buf[1]!='%') continue;
if (strstr(buf,"%%BoundingBox:")==buf) {
if (strstr(buf,"(atend)")==NULL) {
sscanf(&buf[14],"%d %d %d %d",
&llx,&lly,&urx,&ury);
}
break;
} else if (strstr(buf,"%%EndComments")==buf) {
break;
} else if (strstr(buf,"%%EndProlog")==buf) {
break;
}
}
}
/* width and height in pixels */
scrwidth = WidthOfScreen(DefaultScreenOfDisplay(dpy));
scrheight = HeightOfScreen(DefaultScreenOfDisplay(dpy));
scrwidthmm = WidthMMOfScreen(DefaultScreenOfDisplay(dpy));
scrheightmm = HeightMMOfScreen(DefaultScreenOfDisplay(dpy));
xres = (int)(25.4*scrwidth/scrwidthmm)/72.0;
yres = (int)(25.4*scrheight/scrheightmm)/72.0;
if (xres*(urx-llx)>scrwidth || yres*(ury-lly)>scrheight) {
xres = (scrwidth-32.0)/(urx-llx);
yres = (scrheight-32.0)/(ury-lly);
xres = yres = (xres<yres)?xres:yres;
}
width = (urx-llx)*xres;
height = (ury-lly)*yres;
/* create pixmap and its gc */
pix = XCreatePixmap(dpy,DefaultRootWindow(dpy),width,height,
DefaultDepth(dpy,scr));
gcpix = XCreateGC(dpy,pix,0,NULL);
/* create and set Display PostScript context for pixmap */
dps = XDPSCreateSimpleContext(dpy,pix,gcpix,0,height,
DPSDefaultTextBackstop,DPSDefaultErrorProc,NULL);
if (dps==NULL) {
fprintf(stderr,"Cannot create DPS context\n");
exit(-1);
}
DPSPrintf(dps,"\n resyncstart\n");
DPSSetContext(dps);
DPSFlushContext(dps);
DPSWaitContext(dps);
/* paint white background */
DPSPrintf(dps,
"gsave\n"
"1 setgray\n"
"0 0 %d %d rectfill\n"
"grestore\n",
urx-llx,ury-lly);
/* translate */
DPSPrintf(dps,"%d %d translate\n",-llx,-lly);
/* read PostScript from standard input and render in pixmap */
DPSPrintf(dps,"/showpage {} def\n");
while (fgets(buf,LBUF,stdin)!=NULL)
DPSWritePostScript(dps,buf,strlen(buf));
DPSFlushContext(dps);
DPSWaitContext(dps);
/* create and map window */
win = XCreateSimpleWindow(dpy,DefaultRootWindow(dpy),
100,100,width,height,1,black,white);
XSetStandardProperties(dpy,win,"EPS Pixmap","EPSpix",
None,NULL,0,NULL);
XMapWindow(dpy,win);
/* copy pixmap to window; in pixmap, black=0 and white=1 */
gcwin = XCreateGC(dpy,win,0,NULL);
XCopyArea(dpy,pix,win,gcwin,0,0,width,height,0,0);
/* main event loop */
XSelectInput(dpy,win,
KeyPressMask |
ExposureMask);
while(True) {
XNextEvent(dpy,&ev);
if (ev.type==Expose) {
while (XCheckTypedEvent(dpy,Expose,&ev));
XCopyArea(dpy,pix,win,gcwin,0,0,width,height,0,0);
} else if (ev.type==KeyPress) {
break;
}
}
/* clean up */
DPSDestroySpace(DPSSpaceFromContext(dps));
XFreePixmap(dpy,pix);
XFreeGC(dpy,gcpix);
XFreeGC(dpy,gcwin);
}
