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/* $Log: dopage.c,v $
* Revision 0.8 92/11/23 19:46:41 19:46:41 bt (Bo Thide')
* Fixed resolution bug. Portable downloading. Added/changed options. PJXL color support
*
* Revision 0.7 92/11/13 02:41:25 02:41:25 bt (Bo Thide')
* More bug fixes and improvements. Support for PaintJet XL
*
* Revision 0.6 92/11/10 21:47:41 21:47:41 bt (Bo Thide')
* Bug fixes. Added -R option. Better font handling.
*
* Revision 0.5 92/11/09 16:25:28 16:25:28 bt (Bo Thide')
* Rewrite of dospecial.c. Extended \special support
*
* Revision 0.4 92/11/08 02:45:44 02:45:44 bt (Bo Thide')
* Changed to portable bit manipulations. Replaced strrstr for non-POSIX compliant C. Fixed numerous bugs. Added support for more \special's.
*
* Revision 0.3 92/08/24 12:45:36 12:45:36 bt (Bo Thide')
* Fixed 8 bit (dc font) support.
*
* Revision 0.2 92/08/23 17:28:55 17:28:55 bt (Bo Thide')
* Source cleaned up. Changed certain function calls. Removed globals.
*
* Revision 0.1 92/08/22 23:58:47 23:58:47 bt (Bo Thide')
* First Release.
* */
/*
* This is the main printer dependent output routine, which is organized as
* a function with side effects. The subroutine is organized as a typical
* interpreter, with a multiway branch of the command code followed by 'goto'
* statements leading to branches that finish up the activities common to
* different commands. dopage() aborts `dvi2pcl' if something unusual happens.
*
* The definition of dvi files refer to six registers, (h,v,w,x,y,z), which
* hold integer values in dvi units. In practice, we also need registers hh
* and vv, the pixel analogs of h and v, since it is not always true that
* hh = pixel_round(h) or vv = pixel_round(v).
* The stack of (h,w,w,x,y,z) values is represented by eight arrays called
* hstack,...,zstack, hhstack and vvstack.
*/
#include <stdio.h>
#include "dvi.h"
#include "globals.h"
#include "macros.h"
#include "pcl.h"
static char rcsid[] = "$Header: dopage.c,v 0.8 92/11/23 19:46:41 bt Exp $";
dopage(bitfile, dvifile, pcllevel, resolution, device)
FILE *bitfile;
FILE *dvifile;
short pcllevel;
short resolution;
short device;
{
unsigned char o;
int k;
int hhh, vvv;
bool badchar;
long hh, vv;
long p, q;
long hstack[STACKSIZE], vstack[STACKSIZE], wstack[STACKSIZE];
long xstack[STACKSIZE], ystack[STACKSIZE], zstack[STACKSIZE];
int hhstack[STACKSIZE], vvstack[STACKSIZE];
charfmt *c;
h_posed = v_posed = FALSE;
s = hh = vv = h = v = w = x = y = z = 0;
font = NULL;
while (TRUE) {
o = getubyte(dvifile);
if(o >= DVI_SET1)
p = firstpar(dvifile, o);
#ifdef DEBUG
fprintf(stderr,"\ndopage: o = %d, p = %ld, hh = %ld", o, p, hh);
#endif
if(o < DVI_SET1) {
c = drawchar(bitfile, o, hh, vv, resolution, device);
q = c->tfm_width;
hh += c->pxl_width;
goto move_right;
} else
switch(o) {
case DVI_SET1:
case DVI_SET2:
case DVI_SET3:
case DVI_SET4:
c = drawchar(bitfile, p, hh, vv, resolution,
device);
q = c->tfm_width;
hh += c->pxl_width;
goto move_right;
break;
case DVI_PUT1:
case DVI_PUT2:
case DVI_PUT3:
case DVI_PUT4:
drawchar(bitfile, p, hh, vv, resolution,
device);
goto done;
break;
case DVI_SET_RULE:
q = (long)getsquad(dvifile);
drawrule(bitfile, rulepixels(p, conv),
rulepixels(q, conv), hh, vv);
hh += rulepixels(q, conv);
goto move_right;
break;
case DVI_PUT_RULE:
q = (long)getsquad(dvifile);
drawrule(bitfile, rulepixels(p, conv),
rulepixels(q, conv), hh, vv);
goto done;
break;
case DVI_NOP:
goto done;
break;
case DVI_BOP:
fprintf(stderr,"\n'DVI_BOP' occurred before 'DVI_EOP'");
goto endfalse;
break;
case DVI_EOP:
if(maxpages)
putc('\014',bitfile); /* Formfeed */
if(s)
fprintf(stderr,"\nStack not empty at end of page");
return (TRUE);
break;
case DVI_PUSH:
if(s == maxssofar) {
maxssofar++;
if(s == maxs)
fprintf(stderr,"\nDeeper than claimed in postamble");
if(s == STACKSIZE) {
fprintf(stderr,"\nStack capacity exceeded");
goto endfalse;
}
}
hstack[s] = h;
vstack[s] = v;
wstack[s] = w;
xstack[s] = x;
ystack[s] = y;
zstack[s] = z;
hhstack[s] = hh;
vvstack[s] = vv;
s++;
goto done;
break;
case DVI_POP:
if(s) {
s--;
if(hh != hhstack[s]) h_posed = FALSE;
if(vv != vvstack[s]) v_posed = FALSE;
h = hstack[s];
v = vstack[s];
w = wstack[s];
x = xstack[s];
y = ystack[s];
z = zstack[s];
hh = hhstack[s];
vv = vvstack[s];
}
else
fprintf(stderr,"\nIllegal at level zero");
goto done;
break;
case DVI_RIGHT1:
case DVI_RIGHT2:
case DVI_RIGHT3:
case DVI_RIGHT4:
goto out_space;
break;
case DVI_W0:
case DVI_W1:
case DVI_W2:
case DVI_W3:
case DVI_W4:
w = p;
goto out_space;
break;
case DVI_X0:
case DVI_X1:
case DVI_X2:
case DVI_X3:
case DVI_X4:
x = p;
goto out_space;
break;
case DVI_DOWN1:
case DVI_DOWN2:
case DVI_DOWN3:
case DVI_DOWN4:
goto move_down;
break;
case DVI_Y0:
case DVI_Y1:
case DVI_Y2:
case DVI_Y3:
case DVI_Y4:
y = p;
goto move_down;
break;
case DVI_Z0:
case DVI_Z1:
case DVI_Z2:
case DVI_Z3:
case DVI_Z4:
z = p;
goto move_down;
break;
case DVI_FNT_DEF1:
case DVI_FNT_DEF2:
case DVI_FNT_DEF3:
case DVI_FNT_DEF4:
skipfontdef(dvifile);
goto done;
break;
case DVI_XXX1:
case DVI_XXX2:
case DVI_XXX3:
case DVI_XXX4:
badchar = FALSE;
if((long)nextnamesfree - (long)names + p > NAMESIZE )
prerror("Out of string space during special\n");
for(k = 0 ; k < (int)p ; k++) {
q = (long)getubyte(dvifile);
if((q < ' ') || (q > '~'))
badchar = TRUE;
*(nextnamesfree + k) = (char)q;
}
*(nextnamesfree + p) = 0;
if(badchar)
fprintf(stderr,"\nNon-ASCII character in xxx command");
dospecial(bitfile, PRESCAN_OFF, pcllevel, hh,
vv, resolution);
goto done;
break;
case DVI_PRE:
fprintf(stderr,"\nPreamble command within a page");
goto endfalse;
break;
case DVI_POST:
case DVI_POSTPOST:
fprintf(stderr,"\nPostamble command within a page");
goto endfalse;
break;
case DVI_UNDEF0:
case DVI_UNDEF1:
case DVI_UNDEF2:
case DVI_UNDEF3:
case DVI_UNDEF4:
case DVI_UNDEF5:
fprintf(stderr,"\nUndefined DVI command %d.",o);
goto done;
break;
default:
font = fontptr[p];
gfont = gfontptr[p];
if(font->down > 0)
fprintf(bitfile, PCL4_SELECT_FONT, font->down);
goto done;
break;
}
out_space:
if((font == NULL) || (p >= font->space) || (p <= -4*font->space))
hh = round(conv*(h+p));
else
hh += round(conv*p);
q = p;
h_posed = FALSE;
move_right:
hhh = round(conv*(h+q));
if(abs(hhh - hh) > MAXDRIFT) {
h_posed = FALSE;
hh = hhh > hh ? hhh - MAXDRIFT : hhh + MAXDRIFT;
}
h += q;
if((long)abs(h) > maxhsofar) {
if(((long)abs(h) > maxh + 99) && verbose) {
fprintf(stderr,"\n|h| > %d\n", maxh);
maxh = (long)abs(h);
}
maxhsofar = (long)abs(h);
}
goto done;
move_down:
if((font == NULL) || ((long)abs(p) >= 5*font->space))
vv = round(conv*(v+p));
else
vv += round(conv*p);
v_posed = FALSE;
if((v > 0) && (p > 0) && (v > INFINITY-p))
fprintf(stderr,"Arithmetic overflow. Parameter changed from %d to %d.", p, p=INFINITY-v);
if((v < 0) && (p < 0) && (-v > INFINITY+p))
fprintf(stderr,"\ndopage: Arithmetic overflow. Parameter changed from %d to %d.", p, p = -(INFINITY+v));
vvv = round(conv*(v+p));
if(abs(vvv - vv) > MAXDRIFT)
vv = vvv > vv ? vvv - MAXDRIFT : vvv + MAXDRIFT;
v += p;
if((long)abs(v) > maxvsofar) {
if(((long)abs(v) > maxv + 99) && verbose) {
fprintf(stderr,"\n|v| > %d.",maxv);
maxv = (long)abs(v);
}
maxvsofar = (long)abs(v);
}
goto done;
done:
;
}
endfalse:
prerror("\n! Bad .pcl file: page ended unexpectedly !\n");
}
|
