1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 *
32 * Routines that handle color requests passed through as device control commands
33 * in the form "x X SetColor:red". The following PostScript procedures are needed:
34 *
35 * setcolor
36 *
37 * mark /color setcolor mark
38 * mark /color1 /color2 setcolor mark
39 *
40 * Called whenever we want to change PostScript's current color graphics
41 * state parameter. One or two color arguments can be given. In each case
42 * the colors are looked up in the PostScript colordict dictionary that's
43 * defined in *colorfile. Two named colors implies reverse video printing
44 * with the background given in /color2 and the text printed in /color1.
45 * Unknown colors are mapped into defaults - black for a single color and
46 * white on black for reverse video.
47 *
48 * drawrvbox
49 *
50 * leftx rightx drawrvbox -
51 *
52 * Fills a box that extends from leftx to rightx with the background color
53 * that was requested when setcolor set things up for reverse video mode.
54 * The vertical extent of the box is determined using FontBBox just before
55 * the first string is printed, and the height remains in effect until
56 * there's an explicit color change. In otherwords font or size changes
57 * won't always produce correct result in reverse video mode.
58 *
59 * setdecoding
60 *
61 * num setdecoding -
62 *
63 * Selects the text decoding procedure (ie. what's assigned to PostScript
64 * procedure t) from the decodingdefs array defined in the prologue. num
65 * should be the value assigned to variable encoding (in dpost) and will
66 * remain constant throughout a job, unless special features, like reverse
67 * video printing, are requested. The text encoding scheme can be set on
68 * the command line using the -e option. Print time and the size of the
69 * output file will usually decrease as the value assigned to encoding
70 * increases.
71 *
72 *
73 * The recognized collection of "x X SetColor:" commands are:
74 *
75 * x X SetColor: selects black
76 * x X SetColor:color selects color
77 * x X SetColor:color1 on color2 reverse video
78 * x X SetColor:color1 color2 reverse video again
79 * x X SetColor:num1 num2 num3 rgb explicit rgb color request
80 * x X SetColor:num1 num2 num3 hsb explicit hsb color request
81 *
82 * In the last three examples num1, num2, and num3 should be numbers between 0 and
83 * 1 inclusive and are passed on as aguments to the approrpriate PostScript color
84 * command (eg. setrgbcolor). Unknown color names (ie. the ones that setcolor
85 * doesn't find in colordict) are mapped into defaults. For one color the default
86 * is black, while for reverse video it's white text on a black background.
87 *
88 * dpost makes sure the current color is maintained across page boundaries, which
89 * may not be what you want if you're using a macro package like mm that puts out
90 * page footers and headers. Adding a color request to troff and keeping track of
91 * the color in each environment may be the best solution.
92 *
93 * To get reverse video printing follow the "x X SetColor:" command with two or
94 * three arguments. "x X SetColor:white on black" or "x X SetColor:white black"
95 * both produce white text on a black background. Any two colors named in colordict
96 * (in file *colorfile) can be chosen so "x X SetColor:yellow on blue" also works.
97 * Each reverse video mode request selects the vertical extent of the background
98 * box based on the font and size in use just before the first string is printed.
99 * Font and/or size changes aren't guaranteed to work properly in reverse video
100 * printing.
101 *
102 */
103
104
105 #include <stdio.h>
106 #include <ctype.h>
107
108 #include "gen.h" /* general purpose definitions */
109 #include "ext.h" /* external variable definitions */
110
111
112 #define DEFAULTCOLOR "black"
113
114 char color[50] = DEFAULTCOLOR; /* current color */
115 int gotcolor = FALSE; /* TRUE after *colorfile is downloaded */
116 int wantcolor = FALSE; /* TRUE if we really ask for a color */
117
118
119 /*
120 *
121 * All these should be defined in dpost.c.
122 *
123 */
124
125
126 extern int lastend;
127 extern int encoding;
128 extern int maxencoding;
129 extern int realencoding;
130
131 extern char *colorfile;
132 extern FILE *tf;
133
134
135 /*****************************************************************************/
136
137
138 void
getcolor(void)139 getcolor(void)
140 {
141
142 /*
143 *
144 * Responsible for making sure the PostScript color procedures are downloaded from
145 * *colorfile. Done at most once per job, and only if the job really uses color.
146 * For now I've decided not to quit if we can't read the color file.
147 *
148 */
149
150
151 if ( gotcolor == FALSE && access(colorfile, 04) == 0 )
152 doglobal(colorfile);
153
154 if ( tf == stdout )
155 gotcolor = TRUE;
156
157 } /* End of getcolor */
158
159
160 /*****************************************************************************/
161
162
163 void
newcolor(char * name)164 newcolor(char *name)
165 /* of the color */
166 {
167 char *p; /* next character in *name */
168 int i; /* goes in color[i] */
169
170 /*
171 *
172 * Converts *name to lower case and saves the result in color[] for use as the
173 * current color. The first time something other than DEFAULTCOLOR is requested
174 * sets wantcolor to TRUE. Characters are converted to lower case as they're put
175 * in color[] and we quit when we find a newline or get to the end of *name. The
176 * isupper() test is for Berkley systems.
177 *
178 */
179
180
181 for ( p = name; *p && (*p == ' ' || *p == ':'); p++ ) ;
182
183 for ( i = 0; i < sizeof(color) - 1 && *p != '\n' && *p; i++, p++ )
184 if ( isupper(*p) )
185 color[i] = tolower(*p);
186 else color[i] = *p;
187
188 if ( i == 0 )
189 strcpy(color, DEFAULTCOLOR);
190 else color[i] = '\0';
191
192 if ( strcmp(color, DEFAULTCOLOR) != 0 )
193 wantcolor = TRUE;
194
195 } /* End of newcolor */
196
197
198 /*****************************************************************************/
199
200
201 void
setcolor(void)202 setcolor(void)
203 {
204 int newencoding; /* text encoding scheme that's needed */
205 char *p; /* for converting what's in color[] */
206
207 /*
208 *
209 * Sets the color being used by the printer to whatever's stored as the current
210 * color (ie. the string in color[]). wantcolor is only set to TRUE if we've been
211 * through newcolor() and asked for something other than DEFAULTCOLOR (probably
212 * black). While in reverse video mode encoding gets set to maxencoding + 1 in
213 * dpost and 0 on the printer. Didn't see much point in trying to extend reverse
214 * video to all the different encoding schemes. realencoding is restored when we
215 * leave reverse video mode.
216 *
217 */
218
219
220 if ( wantcolor == TRUE ) {
221 endtext();
222 getcolor();
223
224 lastend = -1;
225 newencoding = realencoding;
226
227 if ( islower(color[0]) == 0 ) /* explicit rgb or hsb request */
228 fprintf(tf, "%s\n", color);
229 else {
230 putc('/', tf);
231 for ( p = color; *p && *p != ' '; p++ )
232 putc(*p, tf);
233 for ( ; *p && *p == ' '; p++ ) ;
234 if ( strncmp(p, "on ", 3) == 0 ) p += 3;
235 if ( *p != '\0' ) {
236 fprintf(tf, " /%s", p);
237 newencoding = maxencoding + 1;
238 } /* End if */
239 fprintf(tf, " setcolor\n");
240 } /* End else */
241
242 if ( newencoding != encoding ) {
243 encoding = newencoding;
244 fprintf(tf, "%d setdecoding\n", encoding);
245 resetpos();
246 } /* End if */
247 } /* End if */
248
249 } /* End of setcolor */
250