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driver_slang.c 14 KiB

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  1. /*
  2. * libcaca Colour 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. #ifdef HAVE_SLSMG_UTF8_ENABLE
  141. SLsmg_utf8_enable(1); /* 1 == force, 0 == disable, -1 == autodetect */
  142. SLtt_utf8_enable(1);
  143. #endif
  144. _cucul_set_size(kk->qq, SLtt_Screen_Cols, SLtt_Screen_Rows);
  145. return 0;
  146. }
  147. static int slang_end_graphics(caca_t *kk)
  148. {
  149. SLtt_set_mouse_mode(0, 0);
  150. SLtt_set_cursor_visibility(1);
  151. SLang_reset_tty();
  152. SLsmg_reset_smg();
  153. return 0;
  154. }
  155. static int slang_set_window_title(caca_t *kk, char const *title)
  156. {
  157. /* FIXME */
  158. return 0;
  159. }
  160. static unsigned int slang_get_window_width(caca_t *kk)
  161. {
  162. /* Fallback to a 6x10 font */
  163. return kk->qq->width * 6;
  164. }
  165. static unsigned int slang_get_window_height(caca_t *kk)
  166. {
  167. /* Fallback to a 6x10 font */
  168. return kk->qq->height * 10;
  169. }
  170. static void slang_display(caca_t *kk)
  171. {
  172. int x, y;
  173. uint8_t *attr = kk->qq->attr;
  174. uint32_t *chars = kk->qq->chars;
  175. for(y = 0; y < (int)kk->qq->height; y++)
  176. {
  177. SLsmg_gotorc(y, 0);
  178. for(x = kk->qq->width; x--; )
  179. {
  180. uint32_t c = *chars++;
  181. #if defined(OPTIMISE_SLANG_PALETTE)
  182. uint8_t fgcolor = *attr & 0xf;
  183. uint8_t bgcolor = *attr >> 4;
  184. /* If foreground == background, just don't use this colour
  185. * pair, and print a space instead of the real character. */
  186. if(fgcolor != bgcolor)
  187. {
  188. SLsmg_set_color(slang_assoc[*attr++]);
  189. slang_write_utf32(c);
  190. }
  191. else
  192. {
  193. if(fgcolor == CUCUL_COLOR_BLACK)
  194. fgcolor = CUCUL_COLOR_WHITE;
  195. else if(fgcolor == CUCUL_COLOR_WHITE
  196. || fgcolor <= CUCUL_COLOR_LIGHTGRAY)
  197. fgcolor = CUCUL_COLOR_BLACK;
  198. else
  199. fgcolor = CUCUL_COLOR_WHITE;
  200. SLsmg_set_color(slang_assoc[fgcolor + 16 * bgcolor]);
  201. SLsmg_write_char(' ');
  202. attr++;
  203. }
  204. #else
  205. SLsmg_set_color(*attr++);
  206. slang_write_utf32(c);
  207. #endif
  208. }
  209. }
  210. SLsmg_refresh();
  211. }
  212. static void slang_handle_resize(caca_t *kk)
  213. {
  214. SLtt_get_screen_size();
  215. kk->resize.w = SLtt_Screen_Cols;
  216. kk->resize.h = SLtt_Screen_Rows;
  217. if(kk->resize.w != kk->qq->width || kk->resize.h != kk->qq->height)
  218. SLsmg_reinit_smg();
  219. }
  220. static int slang_get_event(caca_t *kk, struct caca_event *ev)
  221. {
  222. int intkey;
  223. if(!SLang_input_pending(0))
  224. {
  225. ev->type = CACA_EVENT_NONE;
  226. return 0;
  227. }
  228. /* We first use SLang_getkey() to see whether Esc was pressed
  229. * alone, then (if it wasn't) we unget the key and use SLkp_getkey()
  230. * instead, so that escape sequences are interpreted. */
  231. intkey = SLang_getkey();
  232. if(intkey != 0x1b /* Esc */ || SLang_input_pending(0))
  233. {
  234. SLang_ungetkey(intkey);
  235. intkey = SLkp_getkey();
  236. }
  237. /* If the key was ASCII, return it immediately */
  238. if(intkey < 0x100)
  239. {
  240. ev->type = CACA_EVENT_KEY_PRESS;
  241. ev->data.key.c = intkey;
  242. return 1;
  243. }
  244. if(intkey == 0x3e9)
  245. {
  246. int button = (SLang_getkey() - ' ' + 1) & 0xf;
  247. unsigned int x = SLang_getkey() - '!';
  248. unsigned int y = SLang_getkey() - '!';
  249. ev->data.mouse.button = button;
  250. ev->type = CACA_EVENT_MOUSE_PRESS;
  251. _push_event(kk, ev);
  252. ev->type = CACA_EVENT_MOUSE_RELEASE;
  253. _push_event(kk, ev);
  254. if(kk->mouse.x == x && kk->mouse.y == y)
  255. return _pop_event(kk, ev);
  256. kk->mouse.x = x;
  257. kk->mouse.y = y;
  258. ev->type = CACA_EVENT_MOUSE_MOTION;
  259. ev->data.mouse.x = kk->mouse.x;
  260. ev->data.mouse.y = kk->mouse.y;
  261. return 1;
  262. }
  263. switch(intkey)
  264. {
  265. case SL_KEY_UP: ev->data.key.c = CACA_KEY_UP; break;
  266. case SL_KEY_DOWN: ev->data.key.c = CACA_KEY_DOWN; break;
  267. case SL_KEY_LEFT: ev->data.key.c = CACA_KEY_LEFT; break;
  268. case SL_KEY_RIGHT: ev->data.key.c = CACA_KEY_RIGHT; break;
  269. case SL_KEY_IC: ev->data.key.c = CACA_KEY_INSERT; break;
  270. case SL_KEY_DELETE: ev->data.key.c = CACA_KEY_DELETE; break;
  271. case SL_KEY_HOME: ev->data.key.c = CACA_KEY_HOME; break;
  272. case SL_KEY_END: ev->data.key.c = CACA_KEY_END; break;
  273. case SL_KEY_PPAGE: ev->data.key.c = CACA_KEY_PAGEUP; break;
  274. case SL_KEY_NPAGE: ev->data.key.c = CACA_KEY_PAGEDOWN; break;
  275. case SL_KEY_F(1): ev->data.key.c = CACA_KEY_F1; break;
  276. case SL_KEY_F(2): ev->data.key.c = CACA_KEY_F2; break;
  277. case SL_KEY_F(3): ev->data.key.c = CACA_KEY_F3; break;
  278. case SL_KEY_F(4): ev->data.key.c = CACA_KEY_F4; break;
  279. case SL_KEY_F(5): ev->data.key.c = CACA_KEY_F5; break;
  280. case SL_KEY_F(6): ev->data.key.c = CACA_KEY_F6; break;
  281. case SL_KEY_F(7): ev->data.key.c = CACA_KEY_F7; break;
  282. case SL_KEY_F(8): ev->data.key.c = CACA_KEY_F8; break;
  283. case SL_KEY_F(9): ev->data.key.c = CACA_KEY_F9; break;
  284. case SL_KEY_F(10): ev->data.key.c = CACA_KEY_F10; break;
  285. case SL_KEY_F(11): ev->data.key.c = CACA_KEY_F11; break;
  286. case SL_KEY_F(12): ev->data.key.c = CACA_KEY_F12; break;
  287. default: ev->type = CACA_EVENT_NONE; return 0;
  288. }
  289. ev->type = CACA_EVENT_KEY_PRESS;
  290. ev->data.key.ucs4 = 0;
  291. ev->data.key.utf8[0] = '\0';
  292. return 1;
  293. }
  294. /*
  295. * XXX: following functions are local
  296. */
  297. static void slang_init_palette(void)
  298. {
  299. /* See SLang ref., 5.4.4. */
  300. static char *slang_colors[16] =
  301. {
  302. /* Standard colours */
  303. "black",
  304. "blue",
  305. "green",
  306. "cyan",
  307. "red",
  308. "magenta",
  309. "brown",
  310. "lightgray",
  311. /* Bright colours */
  312. "gray",
  313. "brightblue",
  314. "brightgreen",
  315. "brightcyan",
  316. "brightred",
  317. "brightmagenta",
  318. "yellow",
  319. "white",
  320. };
  321. #if defined(OPTIMISE_SLANG_PALETTE)
  322. int i;
  323. for(i = 0; i < 16 * 16; i++)
  324. SLtt_set_color(i, NULL, slang_colors[slang_palette[i * 2]],
  325. slang_colors[slang_palette[i * 2 + 1]]);
  326. #else
  327. int fg, bg;
  328. for(bg = 0; bg < 16; bg++)
  329. for(fg = 0; fg < 16; fg++)
  330. {
  331. int i = fg + 16 * bg;
  332. SLtt_set_color(i, NULL, slang_colors[fg], slang_colors[bg]);
  333. }
  334. #endif
  335. }
  336. static void slang_write_utf32(uint32_t c)
  337. {
  338. #ifdef HAVE_SLSMG_UTF8_ENABLE
  339. static const uint8_t mark[7] =
  340. {
  341. 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC
  342. };
  343. char buf[10], *parser;
  344. int bytes;
  345. #endif
  346. if(c < 0x80)
  347. {
  348. SLsmg_write_char(c);
  349. return;
  350. }
  351. #ifdef HAVE_SLSMG_UTF8_ENABLE
  352. bytes = (c < 0x800) ? 2 : (c < 0x10000) ? 3 : 4;
  353. buf[bytes] = '\0';
  354. parser = buf + bytes;
  355. switch(bytes)
  356. {
  357. case 4: *--parser = (c | 0x80) & 0xbf; c >>= 6;
  358. case 3: *--parser = (c | 0x80) & 0xbf; c >>= 6;
  359. case 2: *--parser = (c | 0x80) & 0xbf; c >>= 6;
  360. }
  361. *--parser = c | mark[bytes];
  362. SLsmg_write_string(buf);
  363. #else
  364. SLsmg_write_char(' ');
  365. #endif
  366. }
  367. #if defined(HAVE_SIGNAL)
  368. static RETSIGTYPE sigwinch_handler(int sig)
  369. {
  370. sigwinch_kk->resize.resized = 1;
  371. signal(SIGWINCH, sigwinch_handler);
  372. }
  373. #endif
  374. #if defined(HAVE_GETENV) && defined(HAVE_PUTENV)
  375. static void slang_check_terminal(void)
  376. {
  377. char *term, *colorterm, *other;
  378. term = getenv("TERM");
  379. colorterm = getenv("COLORTERM");
  380. if(term && !strcmp(term, "xterm"))
  381. {
  382. /* If we are using gnome-terminal, it's really a 16 colour terminal */
  383. if(colorterm && !strcmp(colorterm, "gnome-terminal"))
  384. {
  385. (void)putenv("TERM=xterm-16color");
  386. return;
  387. }
  388. /* Ditto if we are using Konsole */
  389. other = getenv("KONSOLE_DCOP_SESSION");
  390. if(other)
  391. {
  392. (void)putenv("TERM=xterm-16color");
  393. return;
  394. }
  395. }
  396. }
  397. #endif
  398. /*
  399. * Driver initialisation
  400. */
  401. int slang_install(caca_t *kk)
  402. {
  403. kk->drv.driver = CACA_DRIVER_SLANG;
  404. kk->drv.init_graphics = slang_init_graphics;
  405. kk->drv.end_graphics = slang_end_graphics;
  406. kk->drv.set_window_title = slang_set_window_title;
  407. kk->drv.get_window_width = slang_get_window_width;
  408. kk->drv.get_window_height = slang_get_window_height;
  409. kk->drv.display = slang_display;
  410. kk->drv.handle_resize = slang_handle_resize;
  411. kk->drv.get_event = slang_get_event;
  412. kk->drv.set_mouse = NULL;
  413. return 0;
  414. }
  415. #endif /* USE_SLANG */