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driver_vga.c 6.3 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_vga.c
  12. * \version \$Id$
  13. * \author Sam Hocevar <sam@zoy.org>
  14. * \brief VGA driver
  15. *
  16. * This file contains the libcaca VGA input and output driver
  17. */
  18. #include "config.h"
  19. #if defined(USE_VGA)
  20. #include "caca.h"
  21. #include "caca_internals.h"
  22. #include "cucul.h"
  23. #include "cucul_internals.h"
  24. static uint8_t vga_utf32_to_cp437(uint32_t);
  25. /* Address of the VGA screen */
  26. #define VGA_SCREEN ((char *)(intptr_t)0x000b8000)
  27. static uint8_t const vga_colors[][4] =
  28. {
  29. /* Colour values range from 0x00 to 0x3f */
  30. { 0, 0x00, 0x00, 0x00 },
  31. { 1, 0x00, 0x00, 0x1f },
  32. { 2, 0x00, 0x1f, 0x00 },
  33. { 3, 0x00, 0x1f, 0x1f },
  34. { 4, 0x1f, 0x00, 0x00 },
  35. { 5, 0x1f, 0x00, 0x1f },
  36. { 0x14, 0x1f, 0x1f, 0x00 },
  37. { 7, 0x1f, 0x1f, 0x1f },
  38. { 0x38, 0x0f, 0x0f, 0x0f },
  39. { 0x39, 0x0f, 0x0f, 0x3f },
  40. { 0x3a, 0x0f, 0x3f, 0x0f },
  41. { 0x3b, 0x0f, 0x3f, 0x3f },
  42. { 0x3c, 0x3f, 0x0f, 0x0f },
  43. { 0x3d, 0x3f, 0x0f, 0x3f },
  44. { 0x3e, 0x3f, 0x3f, 0x0f },
  45. { 0x3f, 0x3f, 0x3f, 0x3f },
  46. };
  47. static int vga_init_graphics(caca_t *kk)
  48. {
  49. int i;
  50. uint8_t tmp;
  51. /* Blank screen */
  52. memset(VGA_SCREEN, 0, 80 * 25 * 2);
  53. /* Fill VGA palette */
  54. for(i = 0; i < 16; i++)
  55. {
  56. outb(vga_colors[i][0], 0x3c8);
  57. outb(vga_colors[i][1], 0x3c9);
  58. outb(vga_colors[i][2], 0x3c9);
  59. outb(vga_colors[i][3], 0x3c9);
  60. }
  61. /* Hide cursor */
  62. outb(0x0a, 0x3d4);
  63. tmp = inb(0x3d5);
  64. tmp |= 0x20;
  65. outb(0x0a, 0x3d4);
  66. outb(tmp, 0x3d5);
  67. /* We don't have much choice */
  68. _cucul_set_size(kk->qq, 80, 25);
  69. return 0;
  70. }
  71. static int vga_end_graphics(caca_t *kk)
  72. {
  73. uint8_t tmp;
  74. /* Show cursor again */
  75. outb(0x0a, 0x3d4);
  76. tmp = inb(0x3d5);
  77. tmp &= 0xdf;
  78. outb(0x0a, 0x3d4);
  79. outb(tmp, 0x3d5);
  80. return 0;
  81. }
  82. static int vga_set_window_title(caca_t *kk, char const *title)
  83. {
  84. /* Unsupported, of course. */
  85. return 0;
  86. }
  87. static unsigned int vga_get_window_width(caca_t *kk)
  88. {
  89. /* Fallback to a 320x200 screen */
  90. return 320;
  91. }
  92. static unsigned int vga_get_window_height(caca_t *kk)
  93. {
  94. /* Fallback to a 320x200 screen */
  95. return 200;
  96. }
  97. static void vga_display(caca_t *kk)
  98. {
  99. char *screen = (char *)(intptr_t)0x000b8000;
  100. uint8_t *attr = kk->qq->attr;
  101. uint32_t *chars = kk->qq->chars;
  102. int n;
  103. for(n = kk->qq->height * kk->qq->width; n--; )
  104. {
  105. *screen++ = vga_utf32_to_cp437(*chars++);
  106. *screen++ = *attr++;
  107. }
  108. }
  109. static void vga_handle_resize(caca_t *kk)
  110. {
  111. /* We know nothing about our window */
  112. kk->resize.w = kk->qq->width;
  113. kk->resize.h = kk->qq->height;
  114. }
  115. static unsigned int vga_get_event(caca_t *kk)
  116. {
  117. /* FIXME */
  118. return CACA_EVENT_NONE;
  119. }
  120. /*
  121. * XXX: following functions are local
  122. */
  123. static uint8_t vga_utf32_to_cp437(uint32_t c)
  124. {
  125. static uint32_t const lookup1[] =
  126. {
  127. /* 0x01 - 0x0f: ☺ ☻ ♥ ♦ ♣ ♠ • ◘ ○ ◙ ♂ ♀ ♪ ♫ ☼ */
  128. 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022,
  129. 0x25d8, 0x25cb, 0x25d9, 0x2642, 0x2640, 0x266a, 0x266b, 0x263c,
  130. /* 0x10 - 0x1f: ► ◄ ↕ ‼ ¶ § ▬ ↨ ↑ ↓ → ← ∟ ↔ ▲ ▼ */
  131. 0x25ba, 0x25c4, 0x2195, 0x203c, 0xb6, 0xa7, 0x25ac, 0x21a8,
  132. 0x2191, 0x2193, 0x2192, 0x2190, 0x221f, 0x2194, 0x25b2, 0x25bc
  133. };
  134. static uint32_t const lookup2[] =
  135. {
  136. /* 0x7f: ⌂ */
  137. 0x2302,
  138. /* 0x80 - 0x8f: Ç ü é â ä à å ç ê ë è ï î ì Ä Å */
  139. 0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7,
  140. 0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5,
  141. /* 0x90 - 0x9f: É æ Æ ô ö ò û ù ÿ Ö Ü ¢ £ ¥ ₧ ƒ */
  142. 0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9,
  143. 0xff, 0xd6, 0xdc, 0xa2, 0xa3, 0xa5, 0x20a7, 0x192,
  144. /* 0xa0 - 0xaf: á í ó ú ñ Ñ ª º ¿ ⌐ ¬ ½ ¼ ¡ « » */
  145. 0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba,
  146. 0xbf, 0x2310, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb,
  147. /* 0xb0 - 0xbf: ░ ▒ ▓ │ ┤ ╡ ╢ ╖ ╕ ╣ ║ ╗ ╝ ╜ ╛ ┐ */
  148. 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
  149. 0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510,
  150. /* 0xc0 - 0xcf: └ ┴ ┬ ├ ─ ┼ ╞ ╟ ╚ ╔ ╩ ╦ ╠ ═ ╬ ╧ */
  151. 0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f,
  152. 0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567,
  153. /* 0xd0 - 0xdf: ╨ ╤ ╥ ╙ ╘ ╒ ╓ ╫ ╪ ┘ ┌ █ ▄ ▌ ▐ ▀ */
  154. 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b,
  155. 0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580,
  156. /* 0xe0 - 0xef: α ß Γ π Σ σ µ τ Φ Θ Ω δ ∞ φ ε ∩ */
  157. 0x3b1, 0xdf, 0x393, 0x3c0, 0x3a3, 0x3c3, 0xb5, 0x3c4,
  158. 0x3a6, 0x398, 0x3a9, 0x3b4, 0x221e, 0x3c6, 0x3b5, 0x2229,
  159. /* 0xf0 - 0xff: ≡ ± ≥ ≤ ⌠ ⌡ ÷ ≈ ° ∙ · √ ⁿ ² ■ <nbsp> */
  160. 0x2261, 0xb1, 0x2265, 0x2264, 0x2320, 0x2321, 0xf7, 0x2248,
  161. 0xb0, 0x2219, 0xb7, 0x221a, 0x207f, 0xb2, 0x25a0, 0xa0
  162. };
  163. unsigned int i;
  164. if(c < 0x00000020)
  165. return '?';
  166. if(c < 0x00000080)
  167. return c;
  168. for(i = 0; i < sizeof(lookup1) / sizeof(*lookup1); i++)
  169. if(lookup1[i] == c)
  170. return 0x01 + i;
  171. for(i = 0; i < sizeof(lookup2) / sizeof(*lookup2); i++)
  172. if(lookup2[i] == c)
  173. return 0x7f + i;
  174. return '?';
  175. }
  176. /*
  177. * Driver initialisation
  178. */
  179. void vga_init_driver(caca_t *kk)
  180. {
  181. kk->drv.driver = CACA_DRIVER_VGA;
  182. kk->drv.init_graphics = vga_init_graphics;
  183. kk->drv.end_graphics = vga_end_graphics;
  184. kk->drv.set_window_title = vga_set_window_title;
  185. kk->drv.get_window_width = vga_get_window_width;
  186. kk->drv.get_window_height = vga_get_window_height;
  187. kk->drv.display = vga_display;
  188. kk->drv.handle_resize = vga_handle_resize;
  189. kk->drv.get_event = vga_get_event;
  190. }
  191. #endif /* USE_VGA */