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 #pragma ident "%Z%%M% %I% %E% SMI"
31
32 /*
33 *
34 * Routines that handle color requests passed through as device control commands
35 * in the form "x X SetColor:red". The following PostScript procedures are needed:
36 *
37 * setcolor
38 *
39 * mark /color setcolor mark
40 * mark /color1 /color2 setcolor mark
41 *
42 * Called whenever we want to change PostScript's current color graphics
43 * state parameter. One or two color arguments can be given. In each case
44 * the colors are looked up in the PostScript colordict dictionary that's
45 * defined in *colorfile. Two named colors implies reverse video printing
46 * with the background given in /color2 and the text printed in /color1.
47 * Unknown colors are mapped into defaults - black for a single color and
48 * white on black for reverse video.
49 *
50 * drawrvbox
51 *
52 * leftx rightx drawrvbox -
53 *
54 * Fills a box that extends from leftx to rightx with the background color
55 * that was requested when setcolor set things up for reverse video mode.
56 * The vertical extent of the box is determined using FontBBox just before
57 * the first string is printed, and the height remains in effect until
58 * there's an explicit color change. In otherwords font or size changes
59 * won't always produce correct result in reverse video mode.
60 *
61 * setdecoding
62 *
63 * num setdecoding -
64 *
65 * Selects the text decoding procedure (ie. what's assigned to PostScript
66 * procedure t) from the decodingdefs array defined in the prologue. num
67 * should be the value assigned to variable encoding (in dpost) and will
68 * remain constant throughout a job, unless special features, like reverse
69 * video printing, are requested. The text encoding scheme can be set on
70 * the command line using the -e option. Print time and the size of the
71 * output file will usually decrease as the value assigned to encoding
72 * increases.
73 *
74 *
75 * The recognized collection of "x X SetColor:" commands are:
76 *
77 * x X SetColor: selects black
78 * x X SetColor:color selects color
79 * x X SetColor:color1 on color2 reverse video
80 * x X SetColor:color1 color2 reverse video again
81 * x X SetColor:num1 num2 num3 rgb explicit rgb color request
82 * x X SetColor:num1 num2 num3 hsb explicit hsb color request
83 *
84 * In the last three examples num1, num2, and num3 should be numbers between 0 and
85 * 1 inclusive and are passed on as aguments to the approrpriate PostScript color
86 * command (eg. setrgbcolor). Unknown color names (ie. the ones that setcolor
87 * doesn't find in colordict) are mapped into defaults. For one color the default
88 * is black, while for reverse video it's white text on a black background.
89 *
90 * dpost makes sure the current color is maintained across page boundaries, which
91 * may not be what you want if you're using a macro package like mm that puts out
92 * page footers and headers. Adding a color request to troff and keeping track of
93 * the color in each environment may be the best solution.
94 *
95 * To get reverse video printing follow the "x X SetColor:" command with two or
96 * three arguments. "x X SetColor:white on black" or "x X SetColor:white black"
97 * both produce white text on a black background. Any two colors named in colordict
98 * (in file *colorfile) can be chosen so "x X SetColor:yellow on blue" also works.
99 * Each reverse video mode request selects the vertical extent of the background
100 * box based on the font and size in use just before the first string is printed.
101 * Font and/or size changes aren't guaranteed to work properly in reverse video
102 * printing.
103 *
104 */
105
106
107 #include <stdio.h>
108 #include <ctype.h>
109
110 #include "gen.h" /* general purpose definitions */
111 #include "ext.h" /* external variable definitions */
112
113
114 #define DEFAULTCOLOR "black"
115
116 char color[50] = DEFAULTCOLOR; /* current color */
117 int gotcolor = FALSE; /* TRUE after *colorfile is downloaded */
118 int wantcolor = FALSE; /* TRUE if we really ask for a color */
119
120
121 /*
122 *
123 * All these should be defined in dpost.c.
124 *
125 */
126
127
128 extern int lastend;
129 extern int encoding;
130 extern int maxencoding;
131 extern int realencoding;
132
133 extern char *colorfile;
134 extern FILE *tf;
135
136
137 /*****************************************************************************/
138
139
140 void
getcolor(void)141 getcolor(void)
142 {
143
144 /*
145 *
146 * Responsible for making sure the PostScript color procedures are downloaded from
147 * *colorfile. Done at most once per job, and only if the job really uses color.
148 * For now I've decided not to quit if we can't read the color file.
149 *
150 */
151
152
153 if ( gotcolor == FALSE && access(colorfile, 04) == 0 )
154 doglobal(colorfile);
155
156 if ( tf == stdout )
157 gotcolor = TRUE;
158
159 } /* End of getcolor */
160
161
162 /*****************************************************************************/
163
164
165 void
newcolor(char * name)166 newcolor(char *name)
167 /* of the color */
168 {
169 char *p; /* next character in *name */
170 int i; /* goes in color[i] */
171
172 /*
173 *
174 * Converts *name to lower case and saves the result in color[] for use as the
175 * current color. The first time something other than DEFAULTCOLOR is requested
176 * sets wantcolor to TRUE. Characters are converted to lower case as they're put
177 * in color[] and we quit when we find a newline or get to the end of *name. The
178 * isupper() test is for Berkley systems.
179 *
180 */
181
182
183 for ( p = name; *p && (*p == ' ' || *p == ':'); p++ ) ;
184
185 for ( i = 0; i < sizeof(color) - 1 && *p != '\n' && *p; i++, p++ )
186 if ( isupper(*p) )
187 color[i] = tolower(*p);
188 else color[i] = *p;
189
190 if ( i == 0 )
191 strcpy(color, DEFAULTCOLOR);
192 else color[i] = '\0';
193
194 if ( strcmp(color, DEFAULTCOLOR) != 0 )
195 wantcolor = TRUE;
196
197 } /* End of newcolor */
198
199
200 /*****************************************************************************/
201
202
203 void
setcolor(void)204 setcolor(void)
205 {
206 int newencoding; /* text encoding scheme that's needed */
207 char *p; /* for converting what's in color[] */
208
209 /*
210 *
211 * Sets the color being used by the printer to whatever's stored as the current
212 * color (ie. the string in color[]). wantcolor is only set to TRUE if we've been
213 * through newcolor() and asked for something other than DEFAULTCOLOR (probably
214 * black). While in reverse video mode encoding gets set to maxencoding + 1 in
215 * dpost and 0 on the printer. Didn't see much point in trying to extend reverse
216 * video to all the different encoding schemes. realencoding is restored when we
217 * leave reverse video mode.
218 *
219 */
220
221
222 if ( wantcolor == TRUE ) {
223 endtext();
224 getcolor();
225
226 lastend = -1;
227 newencoding = realencoding;
228
229 if ( islower(color[0]) == 0 ) /* explicit rgb or hsb request */
230 fprintf(tf, "%s\n", color);
231 else {
232 putc('/', tf);
233 for ( p = color; *p && *p != ' '; p++ )
234 putc(*p, tf);
235 for ( ; *p && *p == ' '; p++ ) ;
236 if ( strncmp(p, "on ", 3) == 0 ) p += 3;
237 if ( *p != '\0' ) {
238 fprintf(tf, " /%s", p);
239 newencoding = maxencoding + 1;
240 } /* End if */
241 fprintf(tf, " setcolor\n");
242 } /* End else */
243
244 if ( newencoding != encoding ) {
245 encoding = newencoding;
246 fprintf(tf, "%d setdecoding\n", encoding);
247 resetpos();
248 } /* End if */
249 } /* End if */
250
251 } /* End of setcolor */
252