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- /* Copyright (C) 1989-1992 Aladdin Enterprises. All rights reserved.
- Distributed by Free Software Foundation, Inc.
-
- This file is part of Ghostscript.
-
- Ghostscript is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
- to anyone for the consequences of using it or for whether it serves any
- particular purpose or works at all, unless he says so in writing. Refer
- to the Ghostscript General Public License for full details.
-
- Everyone is granted permission to copy, modify and redistribute
- Ghostscript, but only under the conditions described in the Ghostscript
- General Public License. A copy of this license is supposed to have been
- given to you along with Ghostscript so you can know your rights and
- responsibilities. It should be in a file named COPYING. Among other
- things, the copyright notice and this notice must be preserved on all
- copies. */
-
- /* gdevepsn.c */
- /*
- * Epson dot-matrix printer driver for Ghostscript.
- *
- * Two devices are defined here: 'epson' and 'eps9high'. The 'epson' device
- * is the generic device, for 9-pin and 24-pin printers. 'eps9high' is
- * a special mode for 9-pin printers where scan lines are interleaved in
- * multiple passes to produce high vertical resolution at the expense of
- * several passes of the print head.
- *
- * Thanks to David Wexelblat (dwex@mtgzfs3.att.com) for the 'eps9high' code.
- */
- #include "gdevprn.h"
-
- /*
- * Valid values for X_DPI:
- *
- * For 9-pin printers: 60, 120, 240
- * For 24-pin printers: 60, 120, 180, 240, 360
- *
- * The value specified at compile time is the default value used if the
- * user does not specify a resolution at runtime.
- */
- #ifndef X_DPI
- # define X_DPI 240
- #endif
-
- /*
- * For Y_DPI, a given printer will support a base resolution of 60 or 72;
- * check the printer manual. The Y_DPI value must be a multiple of this
- * base resolution. Valid values for Y_DPI:
- *
- * For 9-pin printers: 1*base_res
- * For 24-pin printers: 1*base_res, 3*base_res
- *
- * The value specified at compile time is the default value used if the
- * user does not specify a resolution at runtime.
- */
-
- #ifndef Y_BASERES
- # define Y_BASERES 72
- #endif
- #ifndef Y_DPI
- # define Y_DPI (1*Y_BASERES)
- #endif
-
- /* The device descriptors */
- private dev_proc_print_page(eps_print_page1);
- private dev_proc_print_page(eps_print_page2);
-
- /* Standard Epson device */
- gx_device_printer gs_epson_device =
- prn_device(prn_std_procs, "epson",
- 85, /* width_10ths, 8.5" */
- 110, /* height_10ths, 11" */
- X_DPI, Y_DPI,
- 0, 0, 0.5, 0, /* margins */
- 1, eps_print_page1);
-
- /* High-res (interleaved) 9-pin device */
- gx_device_printer gs_eps9high_device =
- prn_device(prn_std_procs, "eps9high",
- 85, /* width_10ths, 8.5" */
- 110, /* height_10ths, 11" */
- X_DPI, 3*Y_BASERES,
- 0, 0, 0.5, 0, /* margins */
- 1, eps_print_page2);
-
- /* ------ Internal routines ------ */
-
- /* Forward references */
- private void eps_output_run(P6(byte *, int, int, char, FILE *, int));
-
- /* Send the page to the printer. */
- #define DD 0x80 /* double density flag */
- private int
- eps_print_page(gx_device_printer *pdev, FILE *prn_stream, int y_9pin_high)
- {
- static const char graphics_modes_9[5] =
- {
- -1, 0 /*60*/, 1 /*120*/, -1, DD+3 /*240*/
- };
-
- static const char graphics_modes_24[7] =
- {
- -1, 32 /*60*/, 33 /*120*/, 39 /*180*/,
- -1, -1, DD+40 /*360*/
- };
-
- int y_24pin = (y_9pin_high ? 0 : pdev->y_pixels_per_inch > 72);
- int in_y_mult = ((y_24pin | y_9pin_high) ? 3 : 1);
- int line_size = gdev_mem_bytes_per_scan_line((gx_device *)pdev);
- /* Note that in_size is a multiple of 8. */
- int in_size = line_size * (8 * in_y_mult);
- byte *buf1 = (byte *)gs_malloc(in_size, 1, "eps_print_page(buf1)");
- byte *buf2 = (byte *)gs_malloc(in_size, 1, "eps_print_page(buf2)");
- byte *in = buf1;
- byte *out = buf2;
- int out_y_mult = (y_24pin ? 3 : 1);
- int x_dpi = pdev->x_pixels_per_inch;
- char start_graphics =
- (y_24pin ? graphics_modes_24 : graphics_modes_9)[x_dpi / 60];
- int first_pass = (start_graphics & DD ? 1 : 0);
- int last_pass = first_pass * 2;
- int y_passes = (y_9pin_high ? 3 : 1);
- int dots_per_space = x_dpi / 10; /* pica space = 1/10" */
- int bytes_per_space = dots_per_space * out_y_mult;
- int skip = 0, lnum = 0, pass, ypass;
-
- /* Check allocations */
- if ( buf1 == 0 || buf2 == 0 )
- { if ( buf1 )
- gs_free((char *)buf1, in_size, 1, "eps_print_page(buf1)");
- if ( buf2 )
- gs_free((char *)buf2, in_size, 1, "eps_print_page(buf2)");
- return_error(gs_error_VMerror);
- }
-
- /* Initialize the printer and reset the margins. */
- fwrite("\033@\033P\033l\000\r\033Q", 1, 10, prn_stream);
- fputc((int)(pdev->width / pdev->x_pixels_per_inch * 10) + 2,
- prn_stream);
-
- /* Print lines of graphics */
- while ( lnum < pdev->height )
- {
- byte *inp;
- byte *in_end;
- byte *out_end;
- byte *out_blk;
- register byte *outp;
- int lcnt;
-
- /* Copy 1 scan line and test for all zero. */
- gdev_prn_copy_scan_lines(pdev, lnum, in, line_size);
- if ( in[0] == 0 &&
- !memcmp((char *)in, (char *)in + 1, line_size - 1)
- )
- {
- lnum++;
- skip += 3 / in_y_mult;
- continue;
- }
-
- /* Vertical tab to the appropriate position. */
- while ( skip > 255 )
- {
- fputs("\033J\377", prn_stream);
- skip -= 255;
- }
- if ( skip )
- {
- fprintf(prn_stream, "\033J%c", skip);
- }
-
- /* Copy the rest of the scan lines. */
- lcnt = 1 + gdev_prn_copy_scan_lines(pdev, lnum + 1,
- in + line_size,
- in_size - line_size);
- if ( lcnt < 8 * in_y_mult )
- { /* Pad with lines of zeros. */
- memset(in + lcnt * line_size, 0,
- in_size - lcnt * line_size);
- }
-
- if ( y_9pin_high )
- { /* Shuffle the scan lines */
- byte *p;
- int i;
- static const char index[] =
- { 0, 8, 16, 1, 9, 17,
- 2, 10, 18, 3, 11, 19,
- 4, 12, 20, 5, 13, 21,
- 6, 14, 22, 7, 15, 23
- };
-
- for ( i = 0; i < 24; i++ )
- {
- memcpy(out+(index[i]*line_size),
- in+(i*line_size), line_size);
- }
- p = in;
- in = out;
- out = p;
- }
-
- for ( ypass = 0; ypass < y_passes; ypass++ )
- {
- for ( pass = first_pass; pass <= last_pass; pass++ )
- {
- /* We have to 'transpose' blocks of 8 pixels x 8 lines, */
- /* because that's how the printer wants the data. */
- /* If we are in a 24-pin mode, we have to transpose */
- /* groups of 3 lines at a time. */
-
- if ( pass == first_pass )
- {
- out_end = out;
- inp = in;
- in_end = inp + line_size;
-
- if ( y_24pin )
- {
- for ( ; inp < in_end; inp++, out_end += 24 )
- {
- gdev_prn_transpose_8x8(inp, line_size, out_end, 3);
- gdev_prn_transpose_8x8(inp + line_size * 8,
- line_size, out_end + 1, 3);
- gdev_prn_transpose_8x8(inp + line_size * 16,
- line_size, out_end + 2, 3);
- }
- /* Remove trailing 0s. */
- while ( out_end > out && out_end[-1] == 0 &&
- out_end[-2] == 0 && out_end[-3] == 0)
- {
- out_end -= 3;
- }
- }
- else
- {
- for ( ; inp < in_end; inp++, out_end += 8 )
- {
- gdev_prn_transpose_8x8(inp + (ypass * 8*line_size),
- line_size, out_end, 1);
- }
- /* Remove trailing 0s. */
- while ( out_end > out && out_end[-1] == 0 )
- {
- out_end--;
- }
- }
- }
-
- for ( out_blk = outp = out; outp < out_end; )
- {
- /* Skip a run of leading 0s. */
- /* At least 10 are needed to make tabbing */
- /* worth it. We do everything by 3's to */
- /* avoid having to make different cases */
- /* for 9- and 24-pin. */
-
- if ( *outp == 0 && outp + 12 <= out_end &&
- outp[1] == 0 && outp[2] == 0 &&
- (outp[3] | outp[4] | outp[5]) == 0 &&
- (outp[6] | outp[7] | outp[8]) == 0 &&
- (outp[9] | outp[10] | outp[11]) == 0 )
- {
- byte *zp = outp;
- int tpos;
- byte *newp;
-
- outp += 12;
- while ( outp + 3 <= out_end &&
- *outp == 0 &&
- outp[1] == 0 && outp[2] == 0 )
- {
- outp += 3;
- }
- tpos = (outp - out) / bytes_per_space;
- newp = out + tpos * bytes_per_space;
- if ( newp > zp + 10 )
- {
- /* Output preceding bit data.*/
- if ( zp > out_blk )
- {
- /* only false at beginning of line */
- eps_output_run(out_blk, (int)(zp - out_blk),
- out_y_mult, start_graphics,
- prn_stream, pass);
- }
- /* Tab over to the appropriate position. */
- fprintf(prn_stream, "\033D%c%c\t", tpos, 0);
- out_blk = outp = newp;
- }
- }
- else
- {
- outp += out_y_mult;
- }
- }
- if ( outp > out_blk )
- {
- eps_output_run(out_blk, (int)(outp - out_blk),
- out_y_mult, start_graphics,
- prn_stream, pass);
- }
-
- fputc('\r', prn_stream);
- }
- if ( ypass < y_passes - 1 )
- fputs("\033J\001", prn_stream);
- }
- skip = 24 - y_passes + 1; /* no skip on last Y pass */
- lnum += 8 * in_y_mult;
- }
-
- /* Eject the page and reinitialize the printer */
- fputs("\f\033@", prn_stream);
- fflush(prn_stream);
-
- gs_free((char *)buf2, in_size, 1, "eps_print_page(buf2)");
- gs_free((char *)buf1, in_size, 1, "eps_print_page(buf1)");
- return 0;
- }
-
- /* Output a single graphics command. */
- /* pass=0 for all columns, 1 for even columns, 2 for odd columns. */
- private void
- eps_output_run(byte *data, int count, int y_mult,
- char start_graphics, FILE *prn_stream, int pass)
- {
- int xcount = count / y_mult;
-
- fputc(033, prn_stream);
- if ( !(start_graphics & ~3) )
- {
- fputc("KLYZ"[start_graphics], prn_stream);
- }
- else
- {
- fputc('*', prn_stream);
- fputc(start_graphics & ~DD, prn_stream);
- }
- fputc(xcount & 0xff, prn_stream);
- fputc(xcount >> 8, prn_stream);
- if ( !pass )
- {
- fwrite(data, 1, count, prn_stream);
- }
- else
- {
- /* Only write every other column of y_mult bytes. */
- int which = pass;
- register byte *dp = data;
- register int i, j;
-
- for ( i = 0; i < xcount; i++, which++ )
- {
- for ( j = 0; j < y_mult; j++, dp++ )
- {
- putc(((which & 1) ? *dp : 0), prn_stream);
- }
- }
- }
- }
-
- private int
- eps_print_page1(gx_device_printer *pdev, FILE *prn_stream)
- {
- return(eps_print_page(pdev, prn_stream, 0));
- }
-
- private int
- eps_print_page2(gx_device_printer *pdev, FILE *prn_stream)
- {
- return(eps_print_page(pdev, prn_stream, 1));
- }
-