1 | /* |
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2 | * libcaca Colour ASCII-Art library |
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3 | * Copyright (c) 2002-2009 Sam Hocevar <sam@hocevar.net> |
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4 | * All Rights Reserved |
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5 | * |
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6 | * $Id: vga.c 3489 2009-05-19 22:48:12Z sam $ |
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7 | * |
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8 | * This library is free software. It comes without any warranty, to |
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9 | * the extent permitted by applicable law. You can redistribute it |
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10 | * and/or modify it under the terms of the Do What The Fuck You Want |
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11 | * To Public License, Version 2, as published by Sam Hocevar. See |
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12 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
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13 | */ |
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14 | |
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15 | /* |
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16 | * This file contains the libcaca VGA input and output driver |
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17 | */ |
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18 | |
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19 | #include "config.h" |
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20 | |
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21 | #if defined(USE_VGA) |
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22 | |
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23 | #include "caca.h" |
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24 | #include "caca_internals.h" |
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25 | |
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26 | /* Address of the VGA screen */ |
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27 | #define VGA_SCREEN ((char *)(intptr_t)0x000b8000) |
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28 | |
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29 | static uint8_t const vga_colors[][4] = |
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30 | { |
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31 | /* Colour values range from 0x00 to 0x3f */ |
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32 | { 0, 0x00, 0x00, 0x00 }, |
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33 | { 1, 0x00, 0x00, 0x1f }, |
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34 | { 2, 0x00, 0x1f, 0x00 }, |
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35 | { 3, 0x00, 0x1f, 0x1f }, |
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36 | { 4, 0x1f, 0x00, 0x00 }, |
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37 | { 5, 0x1f, 0x00, 0x1f }, |
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38 | { 0x14, 0x1f, 0x1f, 0x00 }, |
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39 | { 7, 0x1f, 0x1f, 0x1f }, |
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40 | |
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41 | { 0x38, 0x0f, 0x0f, 0x0f }, |
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42 | { 0x39, 0x0f, 0x0f, 0x3f }, |
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43 | { 0x3a, 0x0f, 0x3f, 0x0f }, |
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44 | { 0x3b, 0x0f, 0x3f, 0x3f }, |
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45 | { 0x3c, 0x3f, 0x0f, 0x0f }, |
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46 | { 0x3d, 0x3f, 0x0f, 0x3f }, |
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47 | { 0x3e, 0x3f, 0x3f, 0x0f }, |
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48 | { 0x3f, 0x3f, 0x3f, 0x3f }, |
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49 | }; |
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50 | |
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51 | static int vga_init_graphics(caca_display_t *dp) |
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52 | { |
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53 | int i; |
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54 | uint8_t tmp; |
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55 | |
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56 | /* Blank screen */ |
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57 | memset(VGA_SCREEN, 0, 80 * 25 * 2); |
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58 | |
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59 | /* Fill VGA palette */ |
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60 | for(i = 0; i < 16; i++) |
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61 | { |
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62 | outb(vga_colors[i][0], 0x3c8); |
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63 | outb(vga_colors[i][1], 0x3c9); |
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64 | outb(vga_colors[i][2], 0x3c9); |
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65 | outb(vga_colors[i][3], 0x3c9); |
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66 | } |
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67 | |
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68 | /* Hide cursor */ |
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69 | outb(0x0a, 0x3d4); |
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70 | tmp = inb(0x3d5); |
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71 | tmp |= 0x20; |
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72 | outb(0x0a, 0x3d4); |
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73 | outb(tmp, 0x3d5); |
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74 | |
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75 | /* We don't have much choice */ |
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76 | dp->resize.allow = 1; |
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77 | caca_set_canvas_size(dp->cv, 80, 25); |
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78 | dp->resize.allow = 0; |
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79 | |
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80 | return 0; |
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81 | } |
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82 | |
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83 | static int vga_end_graphics(caca_display_t *dp) |
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84 | { |
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85 | uint8_t tmp; |
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86 | |
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87 | /* Show cursor again */ |
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88 | outb(0x0a, 0x3d4); |
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89 | tmp = inb(0x3d5); |
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90 | tmp &= 0xdf; |
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91 | outb(0x0a, 0x3d4); |
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92 | outb(tmp, 0x3d5); |
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93 | |
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94 | return 0; |
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95 | } |
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96 | |
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97 | static int vga_set_display_title(caca_display_t *dp, char const *title) |
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98 | { |
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99 | /* Unsupported, of course. */ |
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100 | return -1; |
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101 | } |
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102 | |
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103 | static int vga_get_display_width(caca_display_t const *dp) |
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104 | { |
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105 | /* Fallback to a 320x200 screen */ |
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106 | return 320; |
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107 | } |
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108 | |
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109 | static int vga_get_display_height(caca_display_t const *dp) |
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110 | { |
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111 | /* Fallback to a 320x200 screen */ |
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112 | return 200; |
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113 | } |
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114 | |
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115 | static void vga_display(caca_display_t *dp) |
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116 | { |
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117 | int x, y, i; |
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118 | |
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119 | for(i = 0; i < caca_get_dirty_rectangle_count(dp->cv); i++) |
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120 | { |
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121 | char *screen = (char *)(intptr_t)0x000b8000; |
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122 | uint32_t const *cvchars, *cvattrs; |
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123 | int xmin, ymin, xmax, ymax; |
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124 | |
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125 | caca_get_dirty_rectangle(dp->cv, i, &xmin, &ymin, &xmax, &ymax); |
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126 | |
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127 | cvchars = (uint32_t const *)caca_get_canvas_chars(dp->cv) |
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128 | + xmin + ymin * dp->cv->width; |
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129 | cvattrs = (uint32_t const *)caca_get_canvas_attrs(dp->cv) |
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130 | + xmin + ymin * dp->cv->width; |
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131 | |
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132 | screen += ymin * dp->cv->width + xmin; |
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133 | |
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134 | for(y = ymin; y <= ymax; y++) |
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135 | { |
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136 | for(x = xmin; x <= xmax; x++) |
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137 | { |
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138 | char ch = caca_utf32_to_cp437(*cvchars++); |
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139 | if(x < xmax && *cvchars == CACA_MAGIC_FULLWIDTH) |
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140 | { |
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141 | *screen++ = '['; |
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142 | *screen++ = caca_attr_to_ansi(*cvattrs++); |
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143 | ch = ']'; |
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144 | cvchars++; |
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145 | x++; |
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146 | } |
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147 | *screen++ = ch; |
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148 | *screen++ = caca_attr_to_ansi(*cvattrs++); |
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149 | } |
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150 | |
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151 | cvchars += dp->cv->width - (xmax - xmin) - 1; |
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152 | cvattrs += dp->cv->width - (xmax - xmin) - 1; |
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153 | screen += 2 * (dp->cv->width - (xmax - xmin) - 1); |
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154 | } |
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155 | } |
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156 | } |
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157 | |
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158 | static void vga_handle_resize(caca_display_t *dp) |
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159 | { |
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160 | /* We know nothing about our window */ |
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161 | dp->resize.w = caca_get_canvas_width(dp->cv); |
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162 | dp->resize.h = caca_get_canvas_height(dp->cv); |
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163 | } |
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164 | |
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165 | static int vga_get_event(caca_display_t *dp, caca_privevent_t *ev) |
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166 | { |
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167 | /* FIXME */ |
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168 | ev->type = CACA_EVENT_NONE; |
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169 | return 0; |
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170 | } |
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171 | |
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172 | /* |
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173 | * Driver initialisation |
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174 | */ |
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175 | |
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176 | int vga_install(caca_display_t *dp) |
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177 | { |
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178 | dp->drv.id = CACA_DRIVER_VGA; |
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179 | dp->drv.driver = "vga"; |
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180 | |
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181 | dp->drv.init_graphics = vga_init_graphics; |
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182 | dp->drv.end_graphics = vga_end_graphics; |
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183 | dp->drv.set_display_title = vga_set_display_title; |
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184 | dp->drv.get_display_width = vga_get_display_width; |
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185 | dp->drv.get_display_height = vga_get_display_height; |
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186 | dp->drv.display = vga_display; |
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187 | dp->drv.handle_resize = vga_handle_resize; |
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188 | dp->drv.get_event = vga_get_event; |
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189 | dp->drv.set_mouse = NULL; |
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190 | dp->drv.set_cursor = NULL; |
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191 | |
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192 | return 0; |
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193 | } |
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194 | |
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195 | #endif /* USE_VGA */ |
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196 | |
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