/* Copyright (C) 1992 Aladdin Enterprises. All rights reserved. This file is part of Aladdin Ghostscript. Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author or distributor accepts any responsibility for the consequences of using it, or for whether it serves any particular purpose or works at all, unless he or she says so in writing. Refer to the Aladdin Ghostscript Free Public License (the "License") for full details. Every copy of Aladdin Ghostscript must include a copy of the License, normally in a plain ASCII text file named PUBLIC. The License grants you the right to copy, modify and redistribute Aladdin Ghostscript, but only under certain conditions described in the License. Among other things, the License requires that the copyright notice and this notice be preserved on all copies. */ /* gdevtknk.c */ /* Tektronix Ink-jet plotter driver. 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 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). */ 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