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- /* Copyright (C) 1989, 1990, 1991 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 */
- #include "gdevprn.h"
- /******
- * For 9-pin printers, you may select
- * X_DPI = 60, 120, or 240
- * Y_DPI = 60 or 72
- * For 24-pin printers, you may select
- * X_DPI = 60, 120, 180, 240, or 360
- * Y_DPI = 60, 72, 180, or 216
- * Note that a given printer implements *either* Y_DPI = 60 | 180 *or*
- * Y_DPI = 72 | 216; no attempt is made to check this here.
- * Note that X_DPI = 180 or 360 requires Y_DPI > 100;
- * this isn't checked either. Finally, note that X_DPI=240 and
- * X_DPI=360 are double-density modes requiring two passes to print.
- *
- * The values of X_DPI and Y_DPI may be set at compile time:
- * see gdevs.mak.
- *
- * At some time in the future, we could simulate 24-bit output on
- * 9-pin printers by using fractional vertical positioning;
- * we could even implement an X_DPI=360 mode by using the
- * ESC++ command that spaces vertically in units of 1/360"
- * (not supported on many printers.)
- ******/
-
- #ifndef X_DPI
- # define X_DPI 240 /* pixels per inch */
- #endif
- #ifndef Y_DPI
- # define Y_DPI 60 /* pixels per inch */
- #endif
-
- /* The device descriptors */
- private dev_proc_print_page(eps_print_page);
- 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_page);
-
- /* ------ 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)
- { static char graphics_modes_9[5] =
- { -1, 0 /*60*/, 1 /*120*/, -1, DD+3 /*240*/
- };
- static char graphics_modes_24[7] =
- { -1, 32 /*60*/, 33 /*120*/, 39 /*180*/,
- -1, -1, DD+40 /*360*/
- };
- int y_24pin = pdev->y_pixels_per_inch > 72;
- int y_mult = (y_24pin ? 3 : 1);
- int line_size = gdev_mem_bytes_per_scan_line((gx_device *)pdev);
- int in_size = line_size * (8 * y_mult);
- byte *in = (byte *)gs_malloc(in_size, 1, "eps_print_page(in)");
- int out_size = ((pdev->width + 7) & -8) * y_mult;
- byte *out = (byte *)gs_malloc(out_size, 1, "eps_print_page(out)");
- 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 dots_per_space = x_dpi / 10; /* pica space = 1/10" */
- int bytes_per_space = dots_per_space * y_mult;
- int skip = 0, lnum = 0, pass;
-
- /* Check allocations */
- if ( in == 0 || out == 0 )
- { if ( in ) gs_free(in, in_size, 1, "eps_print_page(in)");
- if ( out ) gs_free(out, out_size, 1, "eps_print_page(out)");
- return -1;
- }
-
- /* Initialize the printer and reset the margins. */
- fwrite("\033@\033P\033l\000\033Q\377\r", 1, 11, prn_stream);
-
- /* Print lines of graphics */
- while ( lnum < pdev->height )
- { byte *inp = in;
- byte *in_end = in + line_size;
- byte *out_end = out;
- 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 / 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 * y_mult )
- memset(in + lcnt * line_size, 0,
- in_size - lcnt * line_size);
-
- /* 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 ( 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, line_size, out_end, 1);
- }
- /* Remove trailing 0s. */
- while ( out_end > out && out_end[-1] == 0 )
- out_end--;
- }
-
- for ( pass = first_pass; pass <= last_pass; pass++ )
- {
- 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),
- 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 += y_mult;
- }
- if ( outp > out_blk )
- eps_output_run(out_blk, (int)(outp - out_blk),
- y_mult, start_graphics,
- prn_stream, pass);
-
- fputc('\r', prn_stream);
- }
- skip = 24;
- lnum += 8 * y_mult;
- }
-
- /* Eject the page and reinitialize the printer */
- fputs("\f\033@", prn_stream);
-
- gs_free(out, out_size, 1, "eps_print_page(out)");
- gs_free(in, in_size, 1, "eps_print_page(in)");
- 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((char *)data, 1, count, prn_stream);
- else
- { /* Only write every other column of y_mult bytes. */
- int which = pass;
- 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);
- }
- }
- }
-