1 | /* |
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2 | * libcucul Canvas for ultrafast compositing of Unicode letters |
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3 | * Copyright (c) 2002-2006 Sam Hocevar <sam@zoy.org> |
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4 | * 2006 Jean-Yves Lamoureux <jylam@lnxscene.org> |
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5 | * All Rights Reserved |
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6 | * |
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7 | * $Id: export_html.c 769 2006-04-14 07:30:53Z sam $ |
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8 | * |
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9 | * This library is free software; you can redistribute it and/or |
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10 | * modify it under the terms of the Do What The Fuck You Want To |
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11 | * 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 export functions for HTML and HTML3 |
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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(__KERNEL__) |
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22 | # include <stdlib.h> |
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23 | # include <stdio.h> |
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24 | # include <string.h> |
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25 | #endif |
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26 | |
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27 | #include "cucul.h" |
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28 | #include "cucul_internals.h" |
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29 | |
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30 | /** \brief Generate HTML representation of current image. |
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31 | * |
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32 | * This function generates and returns the HTML representation of |
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33 | * the current image. |
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34 | */ |
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35 | void _cucul_get_html(cucul_t *qq, struct cucul_buffer *ex) |
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36 | { |
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37 | static int const palette[] = |
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38 | { |
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39 | 0x000, 0x008, 0x080, 0x088, 0x800, 0x808, 0x880, 0x888, |
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40 | 0x444, 0x44f, 0x4f4, 0x4ff, 0xf44, 0xf4f, 0xff4, 0xfff, |
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41 | }; |
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42 | char *cur; |
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43 | unsigned int x, y, len; |
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44 | |
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45 | /* The CSS palette: roughly 13000 bytes |
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46 | * A line: 7 chars for "<br />\n" |
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47 | * A glyph: 18 chars for "<span class='bxx'>" |
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48 | * up to 9 chars for "&#xxxxxx;", far less for pure ASCII |
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49 | * 7 chars for "</span>" */ |
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50 | ex->size = 13000 + qq->height * (7 + qq->width * (18 + 9 + 7)); |
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51 | ex->data = malloc(ex->size); |
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52 | |
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53 | cur = ex->data; |
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54 | |
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55 | /* HTML header */ |
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56 | cur += sprintf(cur, "<html>\n<head>\n<title>Generated by libcaca %s</title>\n", VERSION); |
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57 | |
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58 | /* CSS */ |
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59 | cur += sprintf(cur, "<style>\n"); |
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60 | cur += sprintf(cur, ".caca { font-family: monospace, fixed; font-weight: bold; }"); |
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61 | for(x = 0; x < 0x100; x++) |
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62 | { |
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63 | cur += sprintf(cur, ".b%02x { color:#%03x; background-color:#%03x; }\n", |
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64 | x, palette[x & 0xf ], palette[x >> 4]); |
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65 | } |
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66 | cur += sprintf(cur, "</style>\n</head>\n<body>\n"); |
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67 | |
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68 | cur += sprintf(cur, "<div cellpadding='0' cellspacing='0' style='%s'>\n", |
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69 | "font-family: monospace, fixed; font-weight: bold;"); |
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70 | |
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71 | for(y = 0; y < qq->height; y++) |
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72 | { |
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73 | uint32_t *lineattr = qq->attr + y * qq->width; |
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74 | uint32_t *linechar = qq->chars + y * qq->width; |
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75 | |
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76 | for(x = 0; x < qq->width; x += len) |
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77 | { |
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78 | cur += sprintf(cur, "<span class='b%02x'>", |
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79 | _cucul_argb32_to_ansi8(lineattr[x])); |
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80 | |
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81 | for(len = 0; |
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82 | x + len < qq->width && lineattr[x + len] == lineattr[x]; |
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83 | len++) |
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84 | { |
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85 | if(linechar[x + len] <= 0x00000020) |
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86 | cur += sprintf(cur, " "); |
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87 | else if(linechar[x + len] < 0x00000080) |
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88 | cur += sprintf(cur, "%c", linechar[x + len]); |
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89 | else |
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90 | cur += sprintf(cur, "&#%i;", linechar[x + len]); |
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91 | } |
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92 | cur += sprintf(cur, "</span>"); |
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93 | } |
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94 | /* New line */ |
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95 | cur += sprintf(cur, "<br />\n"); |
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96 | } |
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97 | |
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98 | cur += sprintf(cur, "</div></body></html>\n"); |
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99 | |
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100 | /* Crop to really used size */ |
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101 | ex->size = strlen(ex->data) + 1; |
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102 | ex->data = realloc(ex->data, ex->size); |
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103 | } |
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104 | |
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105 | |
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106 | /** \brief Generate HTML3 representation of current image. |
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107 | * |
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108 | * This function generates and returns the HTML3 representation of |
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109 | * the current image. It is way bigger than cucul_get_html(), but |
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110 | * permits viewing in old browsers (or limited ones such as links) |
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111 | * Won't work under gecko (mozilla rendering engine) unless you set |
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112 | * a correct header. |
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113 | */ |
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114 | void _cucul_get_html3(cucul_t *qq, struct cucul_buffer *ex) |
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115 | { |
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116 | static int const palette[] = |
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117 | { |
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118 | 0x000000, 0x000088, 0x008800, 0x008888, |
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119 | 0x880000, 0x880088, 0x888800, 0x888888, |
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120 | 0x444444, 0x4444ff, 0x44ff44, 0x44ffff, |
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121 | 0xff4444, 0xff44ff, 0xffff44, 0xffffff, |
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122 | }; |
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123 | |
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124 | char *cur; |
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125 | unsigned int x, y, len; |
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126 | |
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127 | /* The CSS palette: roughly 13000 bytes |
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128 | * A line: 10 chars for "<tr></tr>\n" |
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129 | * A glyph: 40 chars for "<td bgcolor=#xxxxxx><font color=#xxxxxx>" |
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130 | * up to 9 chars for "&#xxxxxx;", far less for pure ASCII |
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131 | * 12 chars for "</font></td>" */ |
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132 | ex->size = 13000 + qq->height * (10 + qq->width * (40 + 9 + 12)); |
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133 | ex->data = malloc(ex->size); |
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134 | |
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135 | cur = ex->data; |
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136 | |
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137 | /* Table */ |
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138 | cur += sprintf(cur, "<table cols='%d' cellpadding='0' cellspacing='0'>\n", |
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139 | qq->height); |
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140 | |
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141 | for(y = 0; y < qq->height; y++) |
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142 | { |
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143 | uint32_t *lineattr = qq->attr + y * qq->width; |
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144 | uint32_t *linechar = qq->chars + y * qq->width; |
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145 | |
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146 | cur += sprintf(cur, "<tr>"); |
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147 | |
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148 | for(x = 0; x < qq->width; x += len) |
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149 | { |
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150 | unsigned int i; |
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151 | |
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152 | /* Use colspan option to factorize cells with same attributes |
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153 | * (see below) */ |
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154 | len = 1; |
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155 | while(x + len < qq->width && lineattr[x + len] == lineattr[x]) |
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156 | len++; |
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157 | |
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158 | cur += sprintf(cur, "<td bgcolor=#%06x", |
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159 | palette[_cucul_argb32_to_ansi4bg(lineattr[x])]); |
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160 | |
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161 | if(len > 1) |
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162 | cur += sprintf(cur, " colspan=%d", len); |
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163 | |
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164 | cur += sprintf(cur, "><font color=#%06x>", |
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165 | palette[_cucul_argb32_to_ansi4fg(lineattr[x])]); |
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166 | |
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167 | for(i = 0; i < len; i++) |
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168 | { |
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169 | if(linechar[x + i] <= 0x00000020) |
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170 | cur += sprintf(cur, " "); |
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171 | else if(linechar[x + i] < 0x00000080) |
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172 | cur += sprintf(cur, "%c", linechar[x + i]); |
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173 | else |
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174 | cur += sprintf(cur, "&#%i;", linechar[x + i]); |
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175 | } |
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176 | |
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177 | cur += sprintf(cur, "</font></td>"); |
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178 | } |
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179 | cur += sprintf(cur, "</tr>\n"); |
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180 | } |
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181 | |
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182 | /* Footer */ |
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183 | cur += sprintf(cur, "</table>\n"); |
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184 | |
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185 | /* Crop to really used size */ |
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186 | ex->size = (uintptr_t)(cur - ex->data); |
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187 | ex->data = realloc(ex->data, ex->size); |
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188 | } |
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189 | |
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190 | |
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