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 | * All Rights Reserved |
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5 | * |
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6 | * $Id: box.c 1452 2006-12-11 15:48:46Z sam $ |
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7 | * |
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8 | * This library is free software. It commes 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 box drawing functions, both filled and outline. |
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17 | */ |
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18 | |
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19 | #include "config.h" |
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20 | #include "common.h" |
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21 | |
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22 | #if !defined(__KERNEL__) |
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23 | # include <stdlib.h> |
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24 | #endif |
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25 | |
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26 | #include "cucul.h" |
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27 | #include "cucul_internals.h" |
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28 | |
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29 | /** \brief Draw a box on the canvas using the given character. |
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30 | * |
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31 | * This function never fails. |
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32 | * |
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33 | * \param cv The handle to the libcucul canvas. |
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34 | * \param x1 X coordinate of the upper-left corner of the box. |
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35 | * \param y1 Y coordinate of the upper-left corner of the box. |
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36 | * \param x2 X coordinate of the lower-right corner of the box. |
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37 | * \param y2 Y coordinate of the lower-right corner of the box. |
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38 | * \param ch UTF-32 character to be used to draw the box. |
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39 | * \return This function always returns 0. |
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40 | */ |
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41 | int cucul_draw_box(cucul_canvas_t *cv, int x1, int y1, int x2, int y2, |
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42 | unsigned long int ch) |
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43 | { |
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44 | cucul_draw_line(cv, x1, y1, x1, y2, ch); |
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45 | cucul_draw_line(cv, x1, y2, x2, y2, ch); |
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46 | cucul_draw_line(cv, x2, y2, x2, y1, ch); |
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47 | cucul_draw_line(cv, x2, y1, x1, y1, ch); |
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48 | |
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49 | return 0; |
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50 | } |
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51 | |
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52 | /** \brief Draw a thin box on the canvas. |
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53 | * |
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54 | * This function never fails. |
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55 | * |
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56 | * \param cv The handle to the libcucul canvas. |
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57 | * \param x1 X coordinate of the upper-left corner of the box. |
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58 | * \param y1 Y coordinate of the upper-left corner of the box. |
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59 | * \param x2 X coordinate of the lower-right corner of the box. |
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60 | * \param y2 Y coordinate of the lower-right corner of the box. |
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61 | * \return This function always returns 0. |
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62 | */ |
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63 | int cucul_draw_thin_box(cucul_canvas_t *cv, int x1, int y1, int x2, int y2) |
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64 | { |
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65 | int x, y, xmax, ymax; |
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66 | |
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67 | if(x1 > x2) |
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68 | { |
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69 | int tmp = x1; |
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70 | x1 = x2; x2 = tmp; |
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71 | } |
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72 | |
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73 | if(y1 > y2) |
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74 | { |
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75 | int tmp = y1; |
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76 | y1 = y2; y2 = tmp; |
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77 | } |
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78 | |
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79 | xmax = cv->width - 1; |
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80 | ymax = cv->height - 1; |
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81 | |
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82 | if(x2 < 0 || y2 < 0 || x1 > xmax || y1 > ymax) |
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83 | return 0; |
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84 | |
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85 | /* Draw edges */ |
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86 | if(y1 >= 0) |
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87 | for(x = x1 < 0 ? 1 : x1 + 1; x < x2 && x < xmax; x++) |
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88 | cucul_put_char(cv, x, y1, '-'); |
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89 | |
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90 | if(y2 <= ymax) |
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91 | for(x = x1 < 0 ? 1 : x1 + 1; x < x2 && x < xmax; x++) |
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92 | cucul_put_char(cv, x, y2, '-'); |
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93 | |
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94 | if(x1 >= 0) |
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95 | for(y = y1 < 0 ? 1 : y1 + 1; y < y2 && y < ymax; y++) |
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96 | cucul_put_char(cv, x1, y, '|'); |
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97 | |
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98 | if(x2 <= xmax) |
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99 | for(y = y1 < 0 ? 1 : y1 + 1; y < y2 && y < ymax; y++) |
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100 | cucul_put_char(cv, x2, y, '|'); |
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101 | |
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102 | /* Draw corners */ |
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103 | cucul_put_char(cv, x1, y1, ','); |
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104 | cucul_put_char(cv, x1, y2, '`'); |
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105 | cucul_put_char(cv, x2, y1, '.'); |
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106 | cucul_put_char(cv, x2, y2, '\''); |
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107 | |
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108 | return 0; |
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109 | } |
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110 | |
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111 | /** \brief Draw a box on the canvas using CP437 characters. |
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112 | * |
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113 | * This function never fails. |
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114 | * |
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115 | * \param cv The handle to the libcucul canvas. |
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116 | * \param x1 X coordinate of the upper-left corner of the box. |
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117 | * \param y1 Y coordinate of the upper-left corner of the box. |
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118 | * \param x2 X coordinate of the lower-right corner of the box. |
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119 | * \param y2 Y coordinate of the lower-right corner of the box. |
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120 | * \return This function always returns 0. |
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121 | */ |
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122 | int cucul_draw_cp437_box(cucul_canvas_t *cv, int x1, int y1, int x2, int y2) |
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123 | { |
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124 | int x, y, xmax, ymax; |
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125 | |
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126 | if(x1 > x2) |
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127 | { |
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128 | int tmp = x1; |
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129 | x1 = x2; x2 = tmp; |
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130 | } |
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131 | |
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132 | if(y1 > y2) |
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133 | { |
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134 | int tmp = y1; |
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135 | y1 = y2; y2 = tmp; |
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136 | } |
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137 | |
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138 | xmax = cv->width - 1; |
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139 | ymax = cv->height - 1; |
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140 | |
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141 | if(x2 < 0 || y2 < 0 || x1 > xmax || y1 > ymax) |
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142 | return 0; |
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143 | |
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144 | /* Draw edges */ |
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145 | if(y1 >= 0) |
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146 | for(x = x1 < 0 ? 1 : x1 + 1; x < x2 && x < xmax; x++) |
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147 | cucul_put_char(cv, x, y1, 0x2500); /* ─ */ |
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148 | |
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149 | if(y2 <= ymax) |
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150 | for(x = x1 < 0 ? 1 : x1 + 1; x < x2 && x < xmax; x++) |
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151 | cucul_put_char(cv, x, y2, 0x2500); /* ─ */ |
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152 | |
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153 | if(x1 >= 0) |
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154 | for(y = y1 < 0 ? 1 : y1 + 1; y < y2 && y < ymax; y++) |
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155 | cucul_put_char(cv, x1, y, 0x2502); /* │ */ |
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156 | |
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157 | if(x2 <= xmax) |
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158 | for(y = y1 < 0 ? 1 : y1 + 1; y < y2 && y < ymax; y++) |
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159 | cucul_put_char(cv, x2, y, 0x2502); /* │ */ |
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160 | |
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161 | /* Draw corners */ |
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162 | cucul_put_char(cv, x1, y1, 0x250c); /* ┌ */ |
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163 | cucul_put_char(cv, x1, y2, 0x2514); /* └ */ |
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164 | cucul_put_char(cv, x2, y1, 0x2510); /* ┐ */ |
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165 | cucul_put_char(cv, x2, y2, 0x2518); /* ┘ */ |
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166 | |
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167 | return 0; |
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168 | } |
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169 | |
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170 | /** \brief Fill a box on the canvas using the given character. |
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171 | * |
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172 | * This function never fails. |
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173 | * |
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174 | * \param cv The handle to the libcucul canvas. |
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175 | * \param x1 X coordinate of the upper-left corner of the box. |
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176 | * \param y1 Y coordinate of the upper-left corner of the box. |
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177 | * \param x2 X coordinate of the lower-right corner of the box. |
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178 | * \param y2 Y coordinate of the lower-right corner of the box. |
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179 | * \param ch UTF-32 character to be used to draw the box. |
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180 | * \return This function always returns 0. |
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181 | */ |
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182 | int cucul_fill_box(cucul_canvas_t *cv, int x1, int y1, int x2, int y2, |
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183 | unsigned long int ch) |
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184 | { |
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185 | int x, y, xmax, ymax; |
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186 | |
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187 | if(x1 > x2) |
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188 | { |
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189 | int tmp = x1; |
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190 | x1 = x2; x2 = tmp; |
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191 | } |
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192 | |
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193 | if(y1 > y2) |
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194 | { |
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195 | int tmp = y1; |
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196 | y1 = y2; y2 = tmp; |
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197 | } |
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198 | |
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199 | xmax = cv->width - 1; |
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200 | ymax = cv->height - 1; |
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201 | |
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202 | if(x2 < 0 || y2 < 0 || x1 > xmax || y1 > ymax) |
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203 | return 0; |
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204 | |
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205 | if(x1 < 0) x1 = 0; |
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206 | if(y1 < 0) y1 = 0; |
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207 | if(x2 > xmax) x2 = xmax; |
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208 | if(y2 > ymax) y2 = ymax; |
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209 | |
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210 | for(y = y1; y <= y2; y++) |
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211 | for(x = x1; x <= x2; x++) |
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212 | cucul_put_char(cv, x, y, ch); |
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213 | |
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214 | return 0; |
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215 | } |
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216 | |
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