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/* Copyright (C) 1993, 1996 Aladdin Enterprises. All rights reserved.
This software is provided AS-IS with no warranty, either express or
implied.
This software is distributed under license and may not be copied,
modified or distributed except as expressly authorized under the terms
of the license contained in the file LICENSE in this distribution.
For more information about licensing, please refer to
http://www.ghostscript.com/licensing/. For information on
commercial licensing, go to http://www.artifex.com/licensing/ or
contact Artifex Software, Inc., 101 Lucas Valley Road #110,
San Rafael, CA 94903, U.S.A., +1(415)492-9861.
*/
/* $Id: gdevo182.c,v 1.6 2004/08/10 13:02:36 stefan Exp $*/
/* Okidata Microline 182 printer driver */
/* Contributed by Maarten Koning (smeg@bnr.ca) April 4, 1993 */
/****************************************************************
I use this driver from Unix with the following aliases:
alias psp "gs -q -sDEVICE=oki182 -sOutputFile=\|lpr - <\!*"
alias psphigh "gs -q -sDEVICE=oki182 -r144 -sOutputFile=\|lpr - <\!*"
ps. I have my printer DIP switches set to the following (as viewed
while standing in front of your printer looking down into the
config access hatch located at the top of your printer
in the centre back).
Upper Upper Bottom
Left Right (at right)
x x x
x x x
x x x
x x x
x x x
x x x
x x x
x x x
The upper DIP switches are on a SuperSpeed Serial
card that will do 19200 baud. I have it set at 9600
baud since that seems sufficient to keep the printer
busy.
The important thing is to be in 8-bit mode so that
the graphics data can't match any Okidata commands
(This driver sets the high bit of graphics data to 1).
****************************************************************/
#include "gdevprn.h"
/*
* Available resolutions are 72x72 or 144x144;
* (144x72) would be possible to do also, but I didn't bother)
*/
/* The device descriptor */
private dev_proc_print_page(oki_print_page);
const gx_device_printer far_data gs_oki182_device =
prn_device(prn_std_procs, "oki182",
80, /* width_10ths, 8.0" */
110, /* height_10ths, 11" */
72, /* x_dpi */
72, /* y_dpi */
0, 0, 0, 0, /* margins */
1, oki_print_page);
/* ------ internal routines ------ */
/* out is a pointer to an array of 7 scan lines,
lineSize is the number of bytes between a pixel and
the pixel directly beneath it.
scanBits is the number of bits in each scan line
out is a pointer to an array of column data, which
is how the Okidata wants the graphics image.
each column of graphics data is 7 bits high and
is encoded in a byte - highest pixel in the column
is the lowest bit in the byte. The upper bit of the
byte is set so that the okidata doesn't mistake
graphic image data for graphic commands.
*/
private void
oki_transpose(byte *in, byte *out, int scanBits, register int lineSize)
{
register bitMask = 0x80;
register byte *inPtr;
register byte outByte;
while (scanBits-- > 0) {
inPtr = in;
if (*inPtr & bitMask)
outByte = 0x81;
else
outByte = 0x80;
if (*(inPtr += lineSize) & bitMask)
outByte += 0x02;
if (*(inPtr += lineSize) & bitMask)
outByte += 0x04;
if (*(inPtr += lineSize) & bitMask)
outByte += 0x08;
if (*(inPtr += lineSize) & bitMask)
outByte += 0x10;
if (*(inPtr += lineSize) & bitMask)
outByte += 0x20;
if (*(inPtr += lineSize) & bitMask)
outByte += 0x40;
*out++ = outByte;
if ((bitMask >>= 1) == 0) {
bitMask = 0x80;
in ++;
}
}
}
/* This routine tries to compress a sequence of okidata
graphic bytes by trimming off leading and trailing
zeros. Trailing zeros can be thrown away and leading
zeros can be replaced with a much smaller number of spaces.
'in' is a pointer to the graphic bytes to be compressed.
origWidth is the number of bytes pointed to by 'in'.
highRes is non-zero when 144x144 mode is being used.
numSpaces is set to the number of spaces that should
be printed before the compressed image. newWidth is
the new number of bytes that the return value of this
function points to.
xxx - A future enhancement would be to replace long sequences
of embedded zeros with exit.graphics-<n> spaces-enter.graphics
*/
private byte *
oki_compress(byte *in, int origWidth, int highRes,
int *numSpaces, int *newWidth)
{
int spaces = 0;
int columns_per_space = 6;
byte *in_end = in + origWidth;
/* remove trailing zeros (which are realy 0x80's) */
while (in_end > in && in_end[-1] == 0x80)
in_end --;
if (highRes)
columns_per_space = 12;
/* remove leading zeros that can be replaced by spaces */
while(in < in_end && in[0] == 0x80 && memcmp((char *)in,
(char *)in + 1, columns_per_space - 1) == 0) {
spaces++;
in += columns_per_space;
}
*numSpaces = spaces;
/* just in case we compressed this line out of existance */
if (in_end > in)
*newWidth = in_end - in;
else
*newWidth = 0;
return(in);
}
/* Send the page to the printer. */
private int
oki_print_page(gx_device_printer *pdev, FILE *prn_stream)
{
int highRes = pdev->y_pixels_per_inch > 100;
int bits_per_column = 7;
int i, spaces, width;
int lcnt;
int line_size = gdev_prn_raster((gx_device_printer *)pdev);
byte *in = (byte *)gs_malloc(pdev->memory, 16, line_size, "oki_print_page(in)");
byte *out1 = (byte *)gs_malloc(pdev->memory, 8, line_size, "oki_print_page(out1)");
byte *out2 = (byte *)gs_malloc(pdev->memory, 8, line_size, "oki_print_page(out2)");
byte *out3;
int lnum = 0;
int skip = 0;
int code = 0;
if ( in == 0 || out1 == 0 || out2 == 0)
{ code = gs_error_VMerror;
gs_note_error(code);
goto bail;
}
/* Initialize the printer. */
/* CAN; 72x72; left margin = 001; disable skip over perforation */
fwrite("\030\034\033%C001\033%S0", 1, 12, prn_stream);
if (highRes) {
fwrite("\033R", 1, 2, prn_stream);
bits_per_column = 14;
}
/* Transfer pixels to printer */
while ( lnum < pdev->height ) {
/* Copy 1 scan line and test for all zero. */
code = gdev_prn_copy_scan_lines(pdev, lnum, in, line_size);
if ( code < 0 )
goto xit;
/* if line is all zero, skip */
if ( in[0] == 0 && !memcmp((char *)in, (char *)in + 1,
line_size - 1)) {
lnum++;
if (highRes)
skip++;
else
skip += 2;
continue;
}
/* use fine line feed to get to the appropriate position. */
while ( skip > 127 ) {
fputs("\033%5\177", prn_stream);
skip -= 127;
}
if ( skip )
fprintf(prn_stream, "\033%%5%c",
(char) (skip & 0xff));
skip = 0;
/* get the rest of the scan lines */
code = gdev_prn_copy_scan_lines(pdev, lnum + 1,
in + line_size, (bits_per_column - 1) * line_size);
if ( code < 0 )
goto xit;
lcnt = code + 1; /* since we already grabbed one line */
if ( lcnt < bits_per_column )
memset(in + lcnt * line_size, 0,
(bits_per_column - lcnt) * line_size);
if (highRes) {
oki_transpose(in, out1, pdev->width, 2 * line_size);
oki_transpose(in + line_size, out2,
pdev->width, 2 * line_size);
} else
oki_transpose(in, out1, pdev->width, line_size);
out3 = oki_compress(out1, pdev->width, highRes,
&spaces, &width);
for (i=0; i < spaces; i++)
putc(' ', prn_stream);
fwrite("\003", 1, 1, prn_stream);
fwrite(out3, 1, width, prn_stream);
if (highRes) {
/* exit graphics; carriage return; 1 bit line feed */
fprintf(prn_stream, "\003\002\015\033%%5%c", (char) 1);
out3 = oki_compress(out2, pdev->width, highRes,
&spaces, &width);
for (i=0; i < spaces; i++)
putc(' ', prn_stream);
fwrite("\003", 1, 1, prn_stream);
fwrite(out3, 1, width, prn_stream);
fprintf(prn_stream, "\003\002\015\033%%5%c", (char) 13);
} else
fwrite("\003\016\003\002", 1, 4, prn_stream);
lnum += bits_per_column;
}
/* Eject the page */
xit:
fputc(014, prn_stream); /* form feed */
fflush(prn_stream);
bail:
if ( out1 != 0 )
gs_free(pdev->memory, (char *)out1, 8, line_size, "oki_print_page(out1)");
if ( out2 != 0 )
gs_free(pdev->memory, (char *)out2, 8, line_size, "oki_print_page(out2)");
if ( in != 0 )
gs_free(pdev->memory, (char *)in, 16, line_size, "oki_print_page(in)");
return code;
}