Commit | Line | Data |
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69695f33 MW |
1 | |
2 | /* Copyright (c) 1995, 1996, 1998, 2000 by Arkkra Enterprises */ | |
3 | /* All rights reserved */ | |
4 | ||
5 | /* functions to support displaying multipage bitmap | |
6 | * (as from Ghostscript -sDEVICE=bit) to AT386 console. | |
7 | */ | |
8 | ||
9 | #include "mupdisp.h" | |
10 | ||
11 | #if defined(AT386) && ! defined(linux) && ! defined(__DOS__) | |
12 | ||
13 | #include <sys/kd.h> | |
14 | #include <termio.h> | |
15 | ||
16 | #define BPL (80) /* bytes per line on screen, AT386 mode */ | |
17 | ||
18 | unsigned char *Video_memory; | |
19 | int Orig_video_mode; /* to put video back the way it was */ | |
20 | struct termio Orig_ttyinfo; /* to put keyboard back from raw mode */ | |
21 | ||
22 | static void setup_keyboard P((void)); | |
23 | \f | |
24 | ||
25 | /* set up for TERM=AT386. Put video and keyboard in proper mode */ | |
26 | ||
27 | void | |
28 | at386_setup() | |
29 | ||
30 | { | |
31 | register int n; /* for setting signal catching */ | |
32 | ||
33 | ||
34 | /* get current video mode, so we can put it back when we're done */ | |
35 | if ((Orig_video_mode = ioctl(1, CONS_GET, 0)) < 0) { | |
36 | fprintf(stderr, "failed to determine current video mode\n"); | |
37 | generalcleanup(1); | |
38 | } | |
39 | ||
40 | /* need to put keyboard into raw mode, save current state */ | |
41 | if (ioctl(0, TCGETA, &Orig_ttyinfo) < 0) { | |
42 | fprintf(stderr, "failed to get tty info\n"); | |
43 | generalcleanup(1); | |
44 | } | |
45 | ||
46 | /* make sure we always clean up, so user isn't left stuck in raw and/or | |
47 | * graphics mode. */ | |
48 | for (n = 1; n < NSIG; n++) { | |
49 | if ( n != SIGKILL && n != SIGCLD) { | |
50 | sigset(n, Conf_info_p->cleanup); | |
51 | } | |
52 | } | |
53 | sigset(SIGWINCH, SIG_IGN); | |
54 | ||
55 | /* put keyboard into raw mode */ | |
56 | setup_keyboard(); | |
57 | ||
58 | /* put screen into graphics mode */ | |
59 | if (ioctl(1, SW_CG640x350, 0) < 0) { | |
60 | generalcleanup(1); | |
61 | } | |
62 | ||
63 | /* get access to video memory */ | |
64 | Video_memory = (unsigned char *) ioctl(1, MAPCONS, 0); | |
65 | } | |
66 | \f | |
67 | ||
68 | /* draw stuff onto screen. Draw starting at specified line of page */ | |
69 | ||
70 | void | |
71 | at386_draw(line, small) | |
72 | ||
73 | int line; /* draw starting from this raster line of page */ | |
74 | int small; /* YES if should draw small view of full page */ | |
75 | ||
76 | { | |
77 | register int i; | |
78 | register int j; | |
79 | unsigned char buff[MAX_BYTES_PER_LINE]; /* a row of bits to display */ | |
80 | int extra; /* how many unused bits in rightmost byte */ | |
81 | int mask; /* to clear out unused bits */ | |
82 | unsigned char *v; /* pointer into video memory */ | |
83 | long offset; /* into bitmap file */ | |
84 | int fd; /* file to read bitmap from */ | |
85 | ||
86 | ||
87 | /* make sure we have a valid page to draw */ | |
88 | if (Currpage_p == (struct Pginfo *) 0) { | |
89 | ( *(Conf_info_p->error) ) ("page # out of range"); | |
90 | return; | |
91 | } | |
92 | ||
93 | /* figure out where in the bitmap file this page is */ | |
94 | offset = Currpage_p->seqnum * BYTES_PER_PAGE; | |
95 | fd = gen1file(small); | |
96 | lseek(fd, offset + line * BYTES_PER_LINE, SEEK_SET); | |
97 | ||
98 | /* read from file and put into video memory, inverting to | |
99 | * black on white */ | |
100 | for (i = 0; i < Conf_info_p->vlines; i++) { | |
101 | read(fd, buff, BYTES_PER_LINE); | |
102 | ||
103 | /* if the page width is not on a byte boundary, blank | |
104 | * out the partial byte at the edge */ | |
105 | mask = 1; | |
106 | for (mask = 1, extra = BYTES_PER_LINE & 0x7; | |
107 | extra > 0; mask <<= 1, extra--) { | |
108 | buff[BYTES_PER_LINE - 1] |= mask; | |
109 | } | |
110 | ||
111 | /* point to row in video memory and transfer bitmap row */ | |
112 | v = Video_memory + i * BPL; | |
113 | for (j = 0; j < BYTES_PER_LINE; j++) { | |
114 | v[j] = buff[j] ^ 0xff; | |
115 | } | |
116 | } | |
117 | } | |
118 | \f | |
119 | ||
120 | /* AT386 cleanup function. | |
121 | * Put screen back into previous mode. Some day maybe we should save the data | |
122 | * on the original screen and put it back when we're done... */ | |
123 | ||
124 | void | |
125 | at386_cleanup(status) | |
126 | ||
127 | int status; | |
128 | ||
129 | { | |
130 | /* put video back to normal */ | |
131 | ioctl(1, MODESWITCH | Orig_video_mode, 0); | |
132 | ||
133 | /* put keyboard back to normal */ | |
134 | ioctl(0, TCSETA, &Orig_ttyinfo); | |
135 | ||
136 | /* call the non-terminal-type specific cleanup */ | |
137 | generalcleanup(status); | |
138 | } | |
139 | \f | |
140 | ||
141 | /* read from keyboard and call do_cmd for each key read. | |
142 | * Commands are described in | |
143 | * the comment at the beginning of do_cmd() */ | |
144 | ||
145 | void | |
146 | at386_user_interf() | |
147 | ||
148 | { | |
149 | int c; /* char read from keyboard */ | |
150 | int special = 0; /* 1 = got an escape, 2 = got escape followed | |
151 | * by [, 0 = not doing any special processing. | |
152 | * This is to handle special function keys. */ | |
153 | ||
154 | while ( (c = getchar() ) != EOF) { | |
155 | if (c == 0x1b) { | |
156 | /* got ESC, could be a special function key */ | |
157 | special = 1; | |
158 | continue; | |
159 | } | |
160 | else if (special == 1 && c == '[') { | |
161 | /* got ESC-[ */ | |
162 | special = 2; | |
163 | continue; | |
164 | } | |
165 | else if (special == 2) { | |
166 | /* map special functions to their equivalent commands */ | |
167 | if (c == 'V') { | |
168 | c = 'p'; /* Page Up key ==> previous */ | |
169 | } | |
170 | else if (c == 'U') { | |
171 | c = 'n'; /* Page Down key ==> next */ | |
172 | } | |
173 | else if (c == 'A') { | |
174 | c = 'b'; /* Up key ==> backwards */ | |
175 | } | |
176 | else if (c == 'B') { | |
177 | c = 'f'; /* Down key ==> forwards */ | |
178 | } | |
179 | } | |
180 | special = 0; | |
181 | do_cmd(c); | |
182 | } | |
183 | } | |
184 | \f | |
185 | ||
186 | /* Error handler. | |
187 | * For now just beep. Maybe eventually pop up an error message */ | |
188 | ||
189 | void | |
190 | at386_error(msg) | |
191 | ||
192 | char *msg; | |
193 | ||
194 | { | |
195 | ioctl(1, KDMKTONE, (150L << 16) | 3600L); | |
196 | } | |
197 | \f | |
198 | ||
199 | /* overlay a raster centered on the window */ | |
200 | ||
201 | void | |
202 | at386_raster(bitmap, width, height) | |
203 | ||
204 | unsigned char *bitmap; /* what to display */ | |
205 | int width, height; /* of bitmap, width is in bytes */ | |
206 | ||
207 | { | |
208 | int i, j; | |
209 | int x, y; /* upper left corner of where to put bitmap, x in bytes */ | |
210 | ||
211 | ||
212 | /* figure out how to center on screen */ | |
213 | x = (BYTES_PER_LINE - width) / 2; | |
214 | y = (Conf_info_p->vlines - height) / 2; | |
215 | ||
216 | /* copy bitmap to screen */ | |
217 | for (i = 0; i < height; i++) { | |
218 | for (j = 0; j < width; j++) { | |
219 | Video_memory[(y + i) * BPL + (x + j)] = | |
220 | bitmap[ (i * width) + j]; | |
221 | } | |
222 | } | |
223 | } | |
224 | \f | |
225 | ||
226 | /* put keyboard in raw mode */ | |
227 | ||
228 | static void | |
229 | setup_keyboard() | |
230 | ||
231 | { | |
232 | struct termio ttyinfo; | |
233 | ||
234 | ||
235 | if (isatty(0) != 1) { | |
236 | fprintf(stderr, "stdin is not a tty\n"); | |
237 | generalcleanup(1); | |
238 | } | |
239 | ||
240 | if (ioctl(0, TCGETA, &ttyinfo) < 0) { | |
241 | fprintf(stderr, "failed to get tty info\n"); | |
242 | generalcleanup(1); | |
243 | } | |
244 | ||
245 | /* turn off echo and canonical */ | |
246 | ttyinfo.c_lflag &= ~(ICANON | ECHO); | |
247 | ttyinfo.c_cc[VMIN] = 1; | |
248 | ttyinfo.c_cc[VTIME] = 3; | |
249 | if (ioctl(0, TCSETA, &ttyinfo) < 0) { | |
250 | fprintf(stderr, "failed to set keyboard modes, errno %d\n", errno); | |
251 | generalcleanup(1); | |
252 | } | |
253 | } | |
254 | \f | |
255 | ||
256 | #else | |
257 | ||
258 | /* some compilers complain about files that are effectively empty, | |
259 | * so put in something even when entire file is effectively ifdef-ed out */ | |
260 | static short dummy; | |
261 | ||
262 | #endif |