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driver_slang.c 14 KiB

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  1. /*
  2. * libcaca ASCII-Art library
  3. * Copyright (c) 2002-2006 Sam Hocevar <sam@zoy.org>
  4. * All Rights Reserved
  5. *
  6. * This library is free software; you can redistribute it and/or
  7. * modify it under the terms of the Do What The Fuck You Want To
  8. * Public License, Version 2, as published by Sam Hocevar. See
  9. * http://sam.zoy.org/wtfpl/COPYING for more details.
  10. */
  11. /** \file driver_slang.c
  12. * \version \$Id$
  13. * \author Sam Hocevar <sam@zoy.org>
  14. * \brief SLang driver
  15. *
  16. * This file contains the libcaca SLang input and output driver
  17. */
  18. #include "config.h"
  19. #if defined(USE_SLANG)
  20. #if defined(HAVE_SLANG_SLANG_H)
  21. # include <slang/slang.h>
  22. #else
  23. # include <slang.h>
  24. #endif
  25. #include <stdlib.h>
  26. #include <string.h>
  27. #if defined(HAVE_SIGNAL_H)
  28. # include <signal.h>
  29. #endif
  30. #include "caca.h"
  31. #include "caca_internals.h"
  32. #include "cucul.h"
  33. #include "cucul_internals.h"
  34. /*
  35. * Global variables
  36. */
  37. /* Tables generated by test/optipal.c */
  38. static int const slang_palette[2*16*16] =
  39. {
  40. 1, 0, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 8, 0,
  41. 9, 0, 10, 0, 11, 0, 12, 0, 13, 0, 14, 0, 15, 0, 0, 8,
  42. 8, 7, 7, 8, 15, 7, 7, 15, 15, 9, 9, 15, 1, 9, 9, 1,
  43. 7, 9, 9, 7, 8, 1, 1, 8, 0, 1, 15, 10, 10, 15, 2, 10,
  44. 10, 2, 7, 10, 10, 7, 8, 2, 2, 8, 0, 2, 15, 11, 11, 15,
  45. 3, 11, 11, 3, 7, 11, 11, 7, 8, 3, 3, 8, 0, 3, 15, 12,
  46. 12, 15, 4, 12, 12, 4, 7, 12, 12, 7, 8, 4, 4, 8, 0, 4,
  47. 15, 13, 13, 15, 5, 13, 13, 5, 7, 13, 13, 7, 8, 5, 5, 8,
  48. 0, 5, 15, 14, 14, 15, 6, 14, 14, 6, 7, 14, 14, 7, 8, 6,
  49. 6, 8, 0, 6, 4, 6, 6, 4, 12, 14, 14, 12, 6, 2, 2, 6,
  50. 14, 10, 10, 14, 2, 3, 3, 2, 10, 11, 11, 10, 3, 1, 1, 3,
  51. 11, 9, 9, 11, 1, 5, 5, 1, 9, 13, 13, 9, 5, 4, 4, 5,
  52. 13, 12, 12, 13, 4, 14, 6, 12, 12, 6, 14, 4, 6, 10, 2, 14,
  53. 14, 2, 10, 6, 2, 11, 3, 10, 10, 3, 11, 2, 3, 9, 1, 11,
  54. 11, 1, 9, 3, 1, 13, 5, 9, 9, 5, 13, 1, 5, 12, 4, 13,
  55. 13, 4, 12, 5, 0, 7, 0, 15, 15, 8, 8, 15, 15, 1, 7, 1,
  56. 1, 6, 2, 5, 3, 4, 4, 3, 5, 2, 6, 1, 0, 0, 1, 1,
  57. 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 2, 2, 3, 3,
  58. 4, 4, 5, 5, 6, 6, 7, 7, 14, 9, 1, 15, 8, 9, 8, 8,
  59. 9, 9, 1, 7, 0, 9, 9, 8, 6, 9, 13, 10, 2, 15, 8, 10,
  60. 7, 2, 15, 2, 2, 7, 0, 10, 10, 8, 5, 10, 12, 11, 3, 15,
  61. 8, 11, 7, 3, 15, 3, 3, 7, 0, 11, 11, 8, 4, 11, 11, 12,
  62. 4, 15, 8, 12, 7, 4, 15, 4, 4, 7, 0, 12, 12, 8, 3, 12,
  63. 10, 13, 5, 15, 8, 13, 7, 5, 15, 5, 5, 7, 0, 13, 13, 8,
  64. 2, 13, 9, 14, 6, 15, 8, 14, 7, 6, 15, 6, 6, 7, 0, 14,
  65. 14, 8, 1, 14, 5, 6, 2, 4, 13, 14, 10, 12, 4, 2, 3, 6,
  66. 12, 10, 11, 14, 6, 3, 1, 2, 14, 11, 9, 10, 2, 1, 5, 3,
  67. 10, 9, 13, 11, 3, 5, 4, 1, 11, 13, 12, 9, 1, 4, 6, 5,
  68. 9, 12, 14, 13, 5, 14, 2, 12, 13, 6, 10, 4, 4, 10, 3, 14,
  69. 12, 2, 11, 6, 6, 11, 1, 10, 14, 3, 9, 2, 2, 9, 5, 11,
  70. 10, 1, 13, 3, 3, 13, 4, 9, 11, 5, 12, 1, 1, 12, 6, 13,
  71. 9, 4, 14, 5, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15,
  72. };
  73. static int const slang_assoc[16*16] =
  74. {
  75. 134, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
  76. 28, 135, 214, 86, 219, 91, 133, 127, 26, 23, 240, 112, 245, 117, 141, 126,
  77. 37, 211, 142, 83, 206, 132, 78, 160, 35, 237, 32, 109, 232, 140, 104, 161,
  78. 46, 87, 82, 143, 131, 215, 210, 169, 44, 113, 108, 41, 139, 241, 236, 170,
  79. 55, 222, 203, 130, 144, 94, 75, 178, 53, 248, 229, 138, 50, 120, 101, 179,
  80. 64, 90, 129, 218, 95, 145, 223, 187, 62, 116, 137, 244, 121, 59, 249, 188,
  81. 73, 128, 79, 207, 74, 202, 146, 196, 71, 136, 105, 233, 100, 228, 68, 197,
  82. 122, 153, 162, 171, 180, 189, 198, 147, 16, 25, 34, 43, 52, 61, 70, 18,
  83. 15, 27, 36, 45, 54, 63, 72, 17, 151, 155, 164, 173, 182, 191, 200, 124,
  84. 154, 22, 238, 110, 243, 115, 156, 24, 150, 152, 216, 88, 221, 93, 148, 20,
  85. 163, 235, 31, 107, 230, 165, 102, 33, 159, 213, 250, 85, 208, 157, 80, 29,
  86. 172, 111, 106, 40, 174, 239, 234, 42, 168, 89, 84, 251, 166, 217, 212, 38,
  87. 181, 246, 227, 183, 49, 118, 99, 51, 177, 224, 205, 175, 252, 96, 77, 47,
  88. 190, 114, 192, 242, 119, 58, 247, 60, 186, 92, 184, 220, 97, 253, 225, 56,
  89. 199, 201, 103, 231, 98, 226, 67, 69, 195, 193, 81, 209, 76, 204, 254, 65,
  90. 123, 149, 158, 167, 176, 185, 194, 19, 125, 21, 30, 39, 48, 57, 66, 255,
  91. };
  92. /*
  93. * Local functions
  94. */
  95. static void slang_init_palette(void);
  96. static void slang_write_utf32(uint32_t);
  97. #if defined(HAVE_SIGNAL)
  98. static RETSIGTYPE sigwinch_handler(int);
  99. static caca_t *sigwinch_kk; /* FIXME: we ought to get rid of this */
  100. #endif
  101. #if defined(HAVE_GETENV) && defined(HAVE_PUTENV)
  102. static void slang_check_terminal(void);
  103. #endif
  104. static int slang_init_graphics(caca_t *kk)
  105. {
  106. #if defined(HAVE_GETENV) && defined(HAVE_PUTENV)
  107. slang_check_terminal();
  108. #endif
  109. #if defined(HAVE_SIGNAL)
  110. sigwinch_kk = kk;
  111. signal(SIGWINCH, sigwinch_handler);
  112. #endif
  113. /* Initialise slang library */
  114. SLsig_block_signals();
  115. SLtt_get_terminfo();
  116. if(SLkp_init() == -1)
  117. {
  118. SLsig_unblock_signals();
  119. return -1;
  120. }
  121. SLang_init_tty(-1, 0, 1);
  122. if(SLsmg_init_smg() == -1)
  123. {
  124. SLsig_unblock_signals();
  125. return -1;
  126. }
  127. SLsig_unblock_signals();
  128. SLsmg_cls();
  129. SLtt_set_cursor_visibility(0);
  130. SLkp_define_keysym("\e[M", 1001);
  131. SLtt_set_mouse_mode(1, 0);
  132. SLsmg_refresh();
  133. /* Disable scrolling so that hashmap scrolling optimization code
  134. * does not cause ugly refreshes due to slow terminals */
  135. SLtt_Term_Cannot_Scroll = 1;
  136. slang_init_palette();
  137. /* Disable alt charset support so that we get a chance to have all
  138. * 256 colour pairs */
  139. SLtt_Has_Alt_Charset = 0;
  140. SLsmg_utf8_enable(1); /* 1 == force, 0 == disable, -1 == autodetect */
  141. SLtt_utf8_enable(1);
  142. _cucul_set_size(kk->qq, SLtt_Screen_Cols, SLtt_Screen_Rows);
  143. return 0;
  144. }
  145. static int slang_end_graphics(caca_t *kk)
  146. {
  147. SLtt_set_mouse_mode(0, 0);
  148. SLtt_set_cursor_visibility(1);
  149. SLang_reset_tty();
  150. SLsmg_reset_smg();
  151. return 0;
  152. }
  153. static int slang_set_window_title(caca_t *kk, char const *title)
  154. {
  155. /* FIXME */
  156. return 0;
  157. }
  158. static unsigned int slang_get_window_width(caca_t *kk)
  159. {
  160. /* Fallback to a 6x10 font */
  161. return kk->qq->width * 6;
  162. }
  163. static unsigned int slang_get_window_height(caca_t *kk)
  164. {
  165. /* Fallback to a 6x10 font */
  166. return kk->qq->height * 10;
  167. }
  168. static void slang_display(caca_t *kk)
  169. {
  170. int x, y;
  171. uint8_t *attr = kk->qq->attr;
  172. uint32_t *chars = kk->qq->chars;
  173. for(y = 0; y < (int)kk->qq->height; y++)
  174. {
  175. SLsmg_gotorc(y, 0);
  176. for(x = kk->qq->width; x--; )
  177. {
  178. uint32_t c = *chars++;
  179. #if defined(OPTIMISE_SLANG_PALETTE)
  180. uint8_t fgcolor = *attr & 0xf;
  181. uint8_t bgcolor = *attr >> 4;
  182. /* If foreground == background, just don't use this colour
  183. * pair, and print a space instead of the real character. */
  184. if(fgcolor != bgcolor)
  185. {
  186. SLsmg_set_color(slang_assoc[*attr++]);
  187. slang_write_utf32(c);
  188. }
  189. else
  190. {
  191. if(fgcolor == CUCUL_COLOR_BLACK)
  192. fgcolor = CUCUL_COLOR_WHITE;
  193. else if(fgcolor == CUCUL_COLOR_WHITE
  194. || fgcolor <= CUCUL_COLOR_LIGHTGRAY)
  195. fgcolor = CUCUL_COLOR_BLACK;
  196. else
  197. fgcolor = CUCUL_COLOR_WHITE;
  198. SLsmg_set_color(slang_assoc[fgcolor + 16 * bgcolor]);
  199. SLsmg_write_char(' ');
  200. attr++;
  201. }
  202. #else
  203. SLsmg_set_color(*attr++);
  204. slang_write_utf32(c);
  205. #endif
  206. }
  207. }
  208. SLsmg_refresh();
  209. }
  210. static void slang_handle_resize(caca_t *kk)
  211. {
  212. SLtt_get_screen_size();
  213. kk->resize.w = SLtt_Screen_Cols;
  214. kk->resize.h = SLtt_Screen_Rows;
  215. if(kk->resize.w != kk->qq->width || kk->resize.h != kk->qq->height)
  216. SLsmg_reinit_smg();
  217. }
  218. static unsigned int slang_get_event(caca_t *kk)
  219. {
  220. unsigned int event;
  221. int intkey;
  222. if(!SLang_input_pending(0))
  223. return CACA_EVENT_NONE;
  224. /* We first use SLang_getkey() to see whether Esc was pressed
  225. * alone, then (if it wasn't) we unget the key and use SLkp_getkey()
  226. * instead, so that escape sequences are interpreted. */
  227. intkey = SLang_getkey();
  228. if(intkey != 0x1b /* Esc */ || SLang_input_pending(0))
  229. {
  230. SLang_ungetkey(intkey);
  231. intkey = SLkp_getkey();
  232. }
  233. /* If the key was ASCII, return it immediately */
  234. if(intkey < 0x100)
  235. {
  236. return CACA_EVENT_KEY_PRESS | intkey;
  237. }
  238. if(intkey == 0x3e9)
  239. {
  240. int button = (SLang_getkey() - ' ' + 1) & 0xf;
  241. unsigned int x = SLang_getkey() - '!';
  242. unsigned int y = SLang_getkey() - '!';
  243. _push_event(kk, CACA_EVENT_MOUSE_PRESS | button);
  244. _push_event(kk, CACA_EVENT_MOUSE_RELEASE | button);
  245. if(kk->mouse.x == x && kk->mouse.y == y)
  246. return _pop_event(kk);
  247. kk->mouse.x = x;
  248. kk->mouse.y = y;
  249. return CACA_EVENT_MOUSE_MOTION | (kk->mouse.x << 12) | kk->mouse.y;
  250. }
  251. event = CACA_EVENT_KEY_PRESS;
  252. switch(intkey)
  253. {
  254. case SL_KEY_UP: return event | CACA_KEY_UP;
  255. case SL_KEY_DOWN: return event | CACA_KEY_DOWN;
  256. case SL_KEY_LEFT: return event | CACA_KEY_LEFT;
  257. case SL_KEY_RIGHT: return event | CACA_KEY_RIGHT;
  258. case SL_KEY_IC: return event | CACA_KEY_INSERT;
  259. case SL_KEY_DELETE: return event | CACA_KEY_DELETE;
  260. case SL_KEY_HOME: return event | CACA_KEY_HOME;
  261. case SL_KEY_END: return event | CACA_KEY_END;
  262. case SL_KEY_PPAGE: return event | CACA_KEY_PAGEUP;
  263. case SL_KEY_NPAGE: return event | CACA_KEY_PAGEDOWN;
  264. case SL_KEY_F(1): return event | CACA_KEY_F1;
  265. case SL_KEY_F(2): return event | CACA_KEY_F2;
  266. case SL_KEY_F(3): return event | CACA_KEY_F3;
  267. case SL_KEY_F(4): return event | CACA_KEY_F4;
  268. case SL_KEY_F(5): return event | CACA_KEY_F5;
  269. case SL_KEY_F(6): return event | CACA_KEY_F6;
  270. case SL_KEY_F(7): return event | CACA_KEY_F7;
  271. case SL_KEY_F(8): return event | CACA_KEY_F8;
  272. case SL_KEY_F(9): return event | CACA_KEY_F9;
  273. case SL_KEY_F(10): return event | CACA_KEY_F10;
  274. case SL_KEY_F(11): return event | CACA_KEY_F11;
  275. case SL_KEY_F(12): return event | CACA_KEY_F12;
  276. }
  277. return CACA_EVENT_NONE;
  278. }
  279. /*
  280. * XXX: following functions are local
  281. */
  282. static void slang_init_palette(void)
  283. {
  284. /* See SLang ref., 5.4.4. */
  285. static char *slang_colors[16] =
  286. {
  287. /* Standard colours */
  288. "black",
  289. "blue",
  290. "green",
  291. "cyan",
  292. "red",
  293. "magenta",
  294. "brown",
  295. "lightgray",
  296. /* Bright colours */
  297. "gray",
  298. "brightblue",
  299. "brightgreen",
  300. "brightcyan",
  301. "brightred",
  302. "brightmagenta",
  303. "yellow",
  304. "white",
  305. };
  306. #if defined(OPTIMISE_SLANG_PALETTE)
  307. int i;
  308. for(i = 0; i < 16 * 16; i++)
  309. SLtt_set_color(i, NULL, slang_colors[slang_palette[i * 2]],
  310. slang_colors[slang_palette[i * 2 + 1]]);
  311. #else
  312. int fg, bg;
  313. for(bg = 0; bg < 16; bg++)
  314. for(fg = 0; fg < 16; fg++)
  315. {
  316. int i = fg + 16 * bg;
  317. SLtt_set_color(i, NULL, slang_colors[fg], slang_colors[bg]);
  318. }
  319. #endif
  320. }
  321. static void slang_write_utf32(uint32_t c)
  322. {
  323. static const uint8_t mark[7] =
  324. {
  325. 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC
  326. };
  327. char buf[10], *parser;
  328. int bytes;
  329. if(c < 0x80)
  330. {
  331. SLsmg_write_char(c);
  332. return;
  333. }
  334. bytes = (c < 0x800) ? 2 : (c < 0x10000) ? 3 : 4;
  335. buf[bytes] = '\0';
  336. parser = buf + bytes;
  337. switch(bytes)
  338. {
  339. case 4: *--parser = (c | 0x80) & 0xbf; c >>= 6;
  340. case 3: *--parser = (c | 0x80) & 0xbf; c >>= 6;
  341. case 2: *--parser = (c | 0x80) & 0xbf; c >>= 6;
  342. }
  343. *--parser = c | mark[bytes];
  344. SLsmg_write_string(buf);
  345. }
  346. #if defined(HAVE_SIGNAL)
  347. static RETSIGTYPE sigwinch_handler(int sig)
  348. {
  349. sigwinch_kk->resize.resized = 1;
  350. signal(SIGWINCH, sigwinch_handler);;
  351. }
  352. #endif
  353. #if defined(HAVE_GETENV) && defined(HAVE_PUTENV)
  354. static void slang_check_terminal(void)
  355. {
  356. char *term, *colorterm, *other;
  357. term = getenv("TERM");
  358. colorterm = getenv("COLORTERM");
  359. if(term && !strcmp(term, "xterm"))
  360. {
  361. /* If we are using gnome-terminal, it's really a 16 colour terminal */
  362. if(colorterm && !strcmp(colorterm, "gnome-terminal"))
  363. {
  364. (void)putenv("TERM=xterm-16color");
  365. return;
  366. }
  367. /* Ditto if we are using Konsole */
  368. other = getenv("KONSOLE_DCOP_SESSION");
  369. if(other)
  370. {
  371. (void)putenv("TERM=xterm-16color");
  372. return;
  373. }
  374. }
  375. }
  376. #endif
  377. /*
  378. * Driver initialisation
  379. */
  380. void slang_init_driver(caca_t *kk)
  381. {
  382. kk->drv.driver = CACA_DRIVER_SLANG;
  383. kk->drv.init_graphics = slang_init_graphics;
  384. kk->drv.end_graphics = slang_end_graphics;
  385. kk->drv.set_window_title = slang_set_window_title;
  386. kk->drv.get_window_width = slang_get_window_width;
  387. kk->drv.get_window_height = slang_get_window_height;
  388. kk->drv.display = slang_display;
  389. kk->drv.handle_resize = slang_handle_resize;
  390. kk->drv.get_event = slang_get_event;
  391. }
  392. #endif /* USE_SLANG */