/* Copyright (C) 1992 Aladdin Enterprises. All rights reserved. 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. */ /* gdevtknk.c */ /* Tektronix Ink-jet plotter driver for Ghostscript. This code is written for 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 Ghostscript. */ /* 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). */ gx_device_printer 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, ushort r, ushort g, ushort b) { 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