/* Copyright (C) 1989, 1992, 1995 artofcode LLC. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the version 2 of the GNU General Public License as published by the Free Software Foundation. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /*$Id: gdevwep9pin.c,v 1.2 2010/07/10 22:02:19 Arabidopsis Exp $*/ /* This code is derived from Okidata IBM compatible dot-matrix printer driver for Ghostscript named gdevokki.c. Thanks to people who are involved in that project. Change : Addition of the Page Length command. Sahaya Darcius Jun 01-2006 WeP Peripherals Pvt Ltd, Mysore, India */ #include "gdevprn.h" /* * Valid values for X_DPI: * * 90, 120, 240 * * 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 120 #endif /* * Valid values for Y_DPI: * * 72, 144 * * The value specified at compile time is the default value used if the * user does not specify a resolution at runtime. */ #ifndef Y_DPI # define Y_DPI 72 #endif /* The device descriptor */ static dev_proc_print_page(wep9pin_print_page); /* WeP 9 Pin device */ const gx_device_printer far_data gs_wep9pin_device = prn_device(prn_std_procs, "wep9pin", DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS, X_DPI, Y_DPI, 0.0, 0.0, 0.0, 0.0, /* margins */ 1, wep9pin_print_page); /* ------ Internal routines ------ */ /* Forward references */ static void wep_output_run(byte *, int, int, char, FILE *, int); /* Send the page to the printer. */ static int wep9pin_print_page1(gx_device_printer *pdev, FILE *prn_stream, int y_9pin_high, const char *init_string, int init_length, const char *end_string, int end_length) { static const char graphics_modes_9[5] = { -1, 0 /*90*/, 1 /*120*/, -1, 3 /*240*/ }; int in_y_mult = (y_9pin_high ? 2 : 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(pdev->memory, in_size, 1, "wep9pin_print_page(buf1)"); byte *buf2 = (byte *)gs_malloc(pdev->memory, in_size, 1, "wep9pin_print_page(buf2)"); byte *in = buf1; byte *out = buf2; int out_y_mult = 1; int x_dpi = pdev->x_pixels_per_inch; char start_graphics = graphics_modes_9[x_dpi / 60]; int first_pass = (start_graphics == 3 ? 1 : 0); int last_pass = first_pass * 2; int y_passes = (y_9pin_high ? 2 : 1); int skip = 0, lnum = 0, pass, ypass; int y_step = 0; float pl=0.0; /* Check allocations */ if ( buf1 == 0 || buf2 == 0 ) { if ( buf1 ) gs_free(pdev->memory, (char *)buf1, in_size, 1, "wep9pin_print_page(buf1)"); if ( buf2 ) gs_free(pdev->memory, (char *)buf2, in_size, 1, "wep9pin_print_page(buf2)"); return_error(gs_error_VMerror); } /* Initialize the printer. */ fwrite(init_string, 1, init_length, prn_stream); /* Page Length command is added*/ pl=(float)pdev->height/(float)pdev->y_pixels_per_inch; fprintf(prn_stream, "\033C%c", (int)(pl*6+0.5)); /* Print lines of graphics */ while ( lnum < pdev->height ) { byte *in_data; byte *inp; byte *in_end; byte *out_end; int lcnt; /* Copy 1 scan line and test for all zero. */ gdev_prn_get_bits(pdev, lnum, in, &in_data); if ( in_data[0] == 0 && !memcmp((char *)in_data, (char *)in_data + 1, line_size - 1) ) { lnum++; skip += 2 / in_y_mult; continue; } /* * Vertical tab to the appropriate position. * The skip count is in 1/144" steps. If total * vertical request is not a multiple od 1/72" * we need to make sure the page is actually * going to advance. */ if ( skip & 1 ) { int n = 1 + (y_step == 0 ? 1 : 0); fprintf(prn_stream, "\033J%c", n); y_step = (y_step + n) % 3; skip -= 1; } skip = skip / 2 * 3; while ( skip > 255 ) { fputs("\033J\377", prn_stream); skip -= 255; } if ( skip ) { fprintf(prn_stream, "\033J%c", skip); } /* Copy the the scan lines. */ lcnt = gdev_prn_copy_scan_lines(pdev, lnum, in, in_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, 2, 4, 6, 8, 10, 12, 14, 1, 3, 5, 7, 9, 11, 13, 15 }; for ( i = 0; i < 16; i++ ) { memcpy( out + (i * line_size), in + (index[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 ( pass == first_pass ) { out_end = out; inp = in; in_end = inp + line_size; 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--; } } /* Transfer whatever is left and print. */ if ( out_end > out ) { wep_output_run(out, (int)(out_end - out), out_y_mult, start_graphics, prn_stream, pass); } fputc('\r', prn_stream); } if ( ypass < y_passes - 1 ) { int n = 1 + (y_step == 0 ? 1 : 0); fprintf(prn_stream, "\033J%c", n); y_step = (y_step + n) % 3; } } skip = 16 - y_passes + 1; /* no skip on last Y pass */ lnum += 8 * in_y_mult; } /* Reinitialize the printer. */ fwrite(end_string, 1, end_length, prn_stream); fflush(prn_stream); gs_free(pdev->memory, (char *)buf2, in_size, 1, "wep9pin_print_page(buf2)"); gs_free(pdev->memory, (char *)buf1, in_size, 1, "wep9pin_print_page(buf1)"); return 0; } /* Output a single graphics command. */ /* pass=0 for all columns, 1 for even columns, 2 for odd columns. */ static void wep_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); fputc("KLYZ"[start_graphics], 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); } } } } /* The print_page procedures are here, to avoid a forward reference. */ static const char wep_init_string[] = { 0x18 }; static const char wep_end_string[] = { 0x0c }; static int wep9pin_print_page(gx_device_printer *pdev, FILE *prn_stream) { char init_string[16], end_string[16]; int init_length, end_length; init_length = sizeof(wep_init_string); memcpy(init_string, wep_init_string, init_length); end_length = sizeof(wep_end_string); memcpy(end_string, wep_end_string, end_length); return wep9pin_print_page1( pdev, prn_stream, pdev->y_pixels_per_inch > 72 ? 1 : 0, init_string, init_length, end_string, end_length ); }