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- /* postscript - XLISP-STAT postscript hard copy routines. */
- /* XLISP-STAT 2.1 Copyright (c) 1990, by Luke Tierney */
- /* Additions to Xlisp 2.1, Copyright (c) 1989 by David Michael Betz */
- /* You may give out copies of this software; for conditions see the */
- /* file COPYING included with this distribution. */
- /* Postscript adapted from file pbmtops.c of Jef Poskanzer's pbm */
- /* system: */
-
- /* pbmtops.c - read a portable bitmap and produce a PostScript bitmap file
- **
- ** Copyright (C) 1988 by Jef Poskanzer.
- **
- ** Permission to use, copy, modify, and distribute this software and its
- ** documentation for any purpose and without fee is hereby granted, provided
- ** that the above copyright notice appear in all copies and that both that
- ** copyright notice and this permission notice appear in supporting
- ** documentation. This software is provided "as is" without express or
- ** implied warranty.
- */
-
- #include <stdio.h>
-
- #ifdef DODO
- sample()
- {
- scale = 1.0;
-
- /* Compute padding to round cols up to the nearest multiple of 8. */
- padright = ( ( cols + 7 ) / 8 ) * 8 - cols;
-
- psputinit(file, cols, rows, scale );
- for ( row = 0; row < rows; row++ ) {
- for ( col = 0; col < cols; col++ )
- psputbit( bits[row][col] );
- for ( col = 0; col < padright; col++ )
- psputbit( 0 );
- }
- psputrest( );
- }
- #endif DODO
-
- /**************************************************************************/
- /** **/
- /** Global Variables **/
- /** **/
- /**************************************************************************/
-
- static int item, bitsperitem, bitshift, rlitemsperline;
- static int repeat, itembuf[128], count, repeatitem, repeatcount;
- static FILE *fp;
-
- /**************************************************************************/
- /** **/
- /** Public Interface **/
- /** **/
- /**************************************************************************/
-
- /* set up global variables and print the postscript preamble */
- psputinit(file, cols, rows, scale )
- FILE *file;
- int cols, rows;
- double scale;
- {
- int scols, srows;
-
- fp = file;
-
- scols = cols * scale * 0.96 + 0.5; /* 0.96 is the multiple of */
- srows = rows * scale * 0.96 + 0.5; /* 72/300 that is closest to 1 */
-
- fprintf(fp, "%%! XLISP-STAT postscript image\n");
- fprintf(fp, "\n" );
- fprintf(fp, "/rlestr1 1 string def\n" );
- fprintf(fp, "/rlestr 128 string def\n" );
- fprintf(fp, "/readrlestring {\n" );
- fprintf(fp, " currentfile rlestr1 readhexstring pop 0 get\n" );
- fprintf(fp, " dup 127 le {\n" );
- fprintf(fp, " currentfile rlestr 0 4 3 roll 1 add getinterval\n" );
- fprintf(fp, " readhexstring pop\n" );
- fprintf(fp, " } {\n" );
- fprintf(fp, " 256 exch sub dup\n" );
- fprintf(fp, " currentfile rlestr1 readhexstring pop 0 get\n" );
- fprintf(fp, " exch 0 exch 1 exch 1 sub { rlestr exch 2 index put } for\n" );
- fprintf(fp, " pop rlestr exch 0 exch getinterval\n" );
- fprintf(fp, " } ifelse\n" );
- fprintf(fp, "} bind def\n" );
- fprintf(fp, "\n" );
- fprintf(fp,
- "%d %d translate\t%% move to lower left corner of box\n",
- 300 - ( scols/2 ), 400 - ( srows/2 ) );
- fprintf(fp, "%d %d scale\t\t%% scale box\n", scols, srows );
- fprintf(fp, "\n" );
- fprintf(fp, "%d %d 1\t\t\t%% width height bits/sample\n", cols, rows );
- fprintf(fp,
- "[ %d 0 0 -%d 0 %d ]\t%% transformation matrix\n", cols, rows, rows );
- fprintf(fp, "{ readrlestring }\t%% proc\n" );
- fprintf(fp, "image\n" );
-
- rlitemsperline = 0;
- item = 0;
- bitsperitem = 0;
- bitshift = 7;
-
- repeat = 1;
- count = 0;
- }
-
- /* enter a bit into the image */
- psputbit(b)
- int b;
- {
- if ( bitsperitem == 8 ) {
- putitem( );
- }
- if ( ! b )
- item += 1 << bitshift;
- bitsperitem++;
- bitshift--;
- }
-
- /* clean up and print the showpage command */
- psputrest( )
- {
- if ( bitsperitem > 0 )
- putitem( );
- if ( count > 0 )
- putrlbuffer( );
- fprintf(fp, "\nshowpage\n" );
- }
-
- /**************************************************************************/
- /** **/
- /** Internal Routines **/
- /** **/
- /**************************************************************************/
-
- static putrlitem( rlitem )
- int rlitem;
- {
- if ( rlitemsperline == 30 ) {
- putc('\n', fp);
- rlitemsperline = 0;
- }
- rlitemsperline++;
- fprintf(fp, "%02x", rlitem );
- }
-
- static putrlbuffer( )
- {
- int i;
-
- if ( repeat ) {
- putrlitem( 256 - count );
- putrlitem( repeatitem );
- }
- else {
- putrlitem( count - 1 );
- for ( i = 0; i < count; i++ )
- putrlitem( itembuf[i] );
- }
- repeat = 1;
- count = 0;
- }
-
- static putitem( )
- {
- int i;
-
- if ( count == 128 )
- putrlbuffer( );
-
- if ( repeat && count == 0 ) {
- /* Still initializing a repeat buf. */
- itembuf[count] = repeatitem = item;
- count++;
- }
- else if ( repeat ) {
- /* Repeating - watch for end of run. */
- if ( item == repeatitem ) {
- /* Run continues. */
- itembuf[count] = item;
- count++;
- }
- else {
- /* Run ended - is it long enough to dump? */
- if ( count > 2 ) {
- /* Yes, dump a repeat-mode buffer and start a new one. */
- putrlbuffer( );
- itembuf[count] = repeatitem = item;
- count++;
- }
- else {
- /* Not long enough - convert to non-repeat mode. */
- repeat = 0;
- itembuf[count] = repeatitem = item;
- count++;
- repeatcount = 1;
- }
- }
- }
- else {
- /* Not repeating - watch for a run worth repeating. */
- if ( item == repeatitem ) {
- /* Possible run continues. */
- repeatcount++;
- if ( repeatcount > 3 ) {
- /* Long enough - dump non-repeat part and start repeat. */
- count = count - ( repeatcount - 1 );
- putrlbuffer( );
- count = repeatcount;
- for ( i = 0; i < count; i++ )
- itembuf[i] = item;
- }
- else {
- /* Not long enough yet - continue as non-repeat buf. */
- itembuf[count] = item;
- count++;
- }
- }
- else {
- /* Broken run. */
- itembuf[count] = repeatitem = item;
- count++;
- repeatcount = 1;
- }
- }
-
- item = 0;
- bitsperitem = 0;
- bitshift = 7;
- }
-