/* Copyright (C) 1992, 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: gdevtknk.c,v 1.6 2002/08/22 07:12:28 henrys Exp $*/ /* This driver is written for Tektronix ink-jet 4696 and 4695 plotters. It may easily be adopted to the 4393 and 4394 models as well, simply by adding new device descriptors with other geometrical characteristics. */ #include "gdevprn.h" #include "malloc_.h" /* Thanks to Karsten Spang (spang@nbivax.nbi.dk) for contributing */ /* this code to Aladdin Enterprises. */ /* The device descriptor */ /* We need our own color mapping procedures. */ private dev_proc_map_rgb_color(tekink_map_rgb_color); private dev_proc_map_color_rgb(tekink_map_color_rgb); private dev_proc_print_page(tekink_print_page); private gx_device_procs tekink_procs = prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close, tekink_map_rgb_color, tekink_map_color_rgb); /* Device descriptor for the Tek 4696. The 4696 plotter uses roll media, thus the y size is arbitrary. The value below is chosen to make the image area A*-format like, i.e. the aspect ratio is close to sqrt(2). */ const gx_device_printer far_data gs_tek4696_device = prn_device(tekink_procs,"tek4696", 85,120, /* Page size in 10th of inches */ 120,120, /* Resolution in DPI */ 0.0,0.0,0.0,0.0, /* Margins */ 4, /* Bits per pixel */ tekink_print_page); /* Color mapping. The tek inkjets use subtractive colors B=0 M=1 Y=2 C=3. These are represented as 4 bits B=1 M=2 Y=4 C=8 in a byte. This gives: White = 0 Black = 1 Magenta = 2 Yellow = 4 Red = 6 Cyan = 8 Blue = 10 Green = 12 The remaining values are unused. (They give ugly results if sent to the plotter.) Of course this could have been compressed into 3 bits, but as the palette color memory device uses 8 bits anyway, this is easier, and perhaps faster. */ static gx_color_index rgb_to_index[8]={1,6,12,4,10,2,8,0}; static ushort index_to_rgb[16][3]={ {65535,65535,65535}, /* White */ {0,0,0}, /* Black */ {65535,0,65535}, /* Magenta */ {2,2,2}, /* Unused */ {65535,65535,0}, /* Yellow */ {2,2,2}, /* Unused */ {65535,0,0}, /* Red */ {2,2,2}, /* Unused */ {0,65535,65535}, /* Cyan */ {2,2,2}, /* Unused */ {0,0,65535}, /* Blue */ {2,2,2}, /* Unused */ {0,65535,0}, /* Green */ {2,2,2}, /* Unused */ {2,2,2}, /* Unused */ {2,2,2} /* Unused */ }; /* Map an RGB color to a printer color. */ private gx_color_index tekink_map_rgb_color(gx_device *dev, const gx_color_value cv[]) { gx_color_value r = cv[0]; gx_color_value g = cv[1]; gx_color_value b = cv[2]; return(rgb_to_index[(((b>32767) << 2) + ((g>32767) << 1) + (r>32767)) & 7]); } /* Map the printer color back to RGB. */ private int tekink_map_color_rgb(gx_device *dev, gx_color_index color, ushort prgb[3]) { register ushort c = (ushort)color; register int i; if (c>15) return -1; if (index_to_rgb[c][0]==2) return -1; for (i=0;i<3;i++){ prgb[i]=index_to_rgb[c][i]; } return 0; } /* Send the page to the printer. */ private int tekink_print_page(gx_device_printer *pdev,FILE *prn_stream) { int line_size,color_line_size,scan_line,num_bytes,scan_lines,color_plane; int roll_paper,out_line,micro_line,pending_micro_lines,line_blank, blank_lines; byte *outdata,*indata1,*bdata1,*mdata1,*ydata1,*cdata1; register byte *indata,*bdatap,*mdatap,*ydatap,*cdatap; register byte bdata,mdata,ydata,cdata; register byte mask,inbyte; register byte *indataend,*outdataend; /* Allocate a temporary buffer for color separation. The buffer is partitioned into an input buffer and four output buffers for the color planes. The output buffers are allocated with an extra sentinel byte. */ line_size = gdev_mem_bytes_per_scan_line((gx_device *)pdev); color_line_size=(pdev->width+7)/8; indata1=(byte *)malloc(line_size+4*(color_line_size+1)); if (indata1==NULL) return -1; /* pointers to the partions */ indataend=indata1+line_size; bdata1=indataend; mdata1=bdata1+(color_line_size+1); ydata1=mdata1+(color_line_size+1); cdata1=ydata1+(color_line_size+1); /* Does this device use roll paper? */ roll_paper=!strcmp(pdev->dname,"tek4696"); out_line=0; blank_lines=0; scan_lines=pdev->height; for (scan_line=0;scan_line>=1; if (!mask){ *(bdatap++) = bdata; *(mdatap++) = mdata; *(cdatap++) = cdata; *(ydatap++) = ydata; bdata=0; mdata=0; cdata=0; ydata=0; mask=0x80; } } if (mask!=0x80){ *bdatap = bdata; *mdatap = mdata; *cdatap = cdata; *ydatap = ydata; } line_blank=1; /* Output each of the four color planes */ for (color_plane=0;color_plane<4;color_plane++){ outdata=indataend+(color_plane*(color_line_size+1)); outdataend=outdata+color_line_size; /* Remove trailing spaces and output the color line if it is not blank */ *outdata=0xff; while (!(*outdataend)) outdataend--; if (num_bytes=(outdataend-outdata)){ line_blank=0; /* On encountering the first non-blank data, output pending blank lines */ if (blank_lines){ pending_micro_lines=((out_line+blank_lines+1)/4)- (out_line/4); for (micro_line=0;micro_line