1 | /* |
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2 | orxonox - the future of 3D-vertical-scrollers |
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3 | |
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4 | Copyright (C) 2004 orx |
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5 | |
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6 | This program is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 2, or (at your option) |
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9 | any later version. |
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10 | |
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11 | ### File Specific: |
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12 | main-programmer: Benjamin Grauer |
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13 | co-programmer: ... |
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14 | */ |
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15 | |
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16 | #define DEBUG_SPECIAL_MODULE DEBUG_MODULE_GRAPHICS |
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17 | |
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18 | #include "text.h" |
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19 | #include "font.h" |
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20 | |
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21 | #include "util/loading/resource_manager.h" |
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22 | #include "debug.h" |
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23 | |
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24 | using namespace std; |
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25 | |
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26 | /** |
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27 | * @brief creates a new Text Element |
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28 | * @param fontFile the Font to render this text in |
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29 | * @param type The renderType to display this font in |
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30 | */ |
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31 | Text::Text(const std::string& fontFile, unsigned int textSize) |
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32 | { |
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33 | this->setClassID(CL_TEXT, "Text"); |
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34 | |
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35 | // initialize this Text |
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36 | this->font = NULL; |
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37 | this->text = ""; |
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38 | this->setAlignment(TEXT_DEFAULT_ALIGNMENT); |
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39 | this->blending = TEXT_DEFAULT_BLENDING; |
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40 | this->color = TEXT_DEFAULT_COLOR; |
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41 | this->setSize(TEXT_DEFAULT_SIZE); |
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42 | this->setText(""); |
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43 | |
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44 | |
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45 | if (!fontFile.empty()) |
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46 | this->setFont(fontFile, FONT_DEFAULT_RENDER_SIZE); |
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47 | this->setSizeY2D(textSize); |
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48 | } |
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49 | |
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50 | /** |
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51 | * @brief deletes a Text out of memory |
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52 | */ |
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53 | Text::~Text() |
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54 | { |
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55 | if (this->font != NULL && this->font != Font::getDefaultFont()) |
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56 | ResourceManager::getInstance()->unload(this->font); |
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57 | } |
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58 | |
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59 | |
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60 | /** |
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61 | * @brief sets the Font of this Text to font from fontFile |
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62 | * @param fontFile the File to load the Font from. |
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63 | * @param fontSize the Size of the Font |
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64 | */ |
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65 | void Text::setFont(const std::string& fontFile, unsigned int fontSize) |
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66 | { |
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67 | Font* newFont; |
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68 | Font* oldFont = this->font; |
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69 | |
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70 | // load a new Font |
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71 | if (!fontFile.empty()) |
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72 | { |
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73 | newFont = (Font*)ResourceManager::getInstance()->load(fontFile, TTF, RP_GAME, (int)fontSize); |
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74 | if (newFont == NULL) |
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75 | { |
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76 | newFont = Font::getDefaultFont(); |
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77 | PRINTF(2)("Font %s could not be loaded, probably file not found\n", fontFile.c_str()); |
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78 | } |
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79 | } |
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80 | else |
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81 | newFont = Font::getDefaultFont(); |
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82 | |
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83 | // unloading the Font if we alrady have one loaded. |
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84 | this->font = newFont; |
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85 | if (oldFont != NULL && oldFont != Font::getDefaultFont()) |
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86 | ResourceManager::getInstance()->unload(oldFont); |
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87 | } |
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88 | |
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89 | /** |
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90 | * @brief Sets a new Text to the font |
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91 | * @param text the new text to set |
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92 | */ |
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93 | void Text::setText(const std::string& text) |
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94 | { |
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95 | this->text = text; |
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96 | |
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97 | // setting up the Text-Width if DYNAMIC |
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98 | // if (this->type & TEXT_RENDER_DYNAMIC && this->getAlignment() != TEXT_ALIGN_LEFT && this->font != NULL) |
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99 | const Font* calcSizeFont = this->font; |
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100 | if (calcSizeFont != NULL || (calcSizeFont = Font::getDefaultFont()) != NULL) |
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101 | { |
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102 | Glyph** glyphArray = calcSizeFont->getGlyphArray(); |
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103 | |
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104 | float width = 0; |
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105 | if (!this->text.empty()) |
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106 | { |
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107 | for (unsigned int i = 0; i < this->text.size(); i++) |
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108 | { |
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109 | if(glyphArray[this->text[i]] != NULL) |
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110 | { |
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111 | width += glyphArray[this->text[i]]->advance; |
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112 | } |
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113 | } |
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114 | this->setSizeX2D(width *this->getSizeY2D()); |
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115 | } |
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116 | } |
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117 | } |
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118 | |
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119 | /** |
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120 | * @brief draws the Text |
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121 | */ |
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122 | void Text::draw() const |
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123 | { |
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124 | glPushMatrix(); |
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125 | // transform for alignment. |
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126 | if (this->getAlignment() == TEXT_ALIGN_RIGHT) |
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127 | glTranslatef(-this->getSizeX2D(), 0, 0); |
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128 | else if (this->getAlignment() == TEXT_ALIGN_CENTER || this->getAlignment() == TEXT_ALIGN_SCREEN_CENTER) |
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129 | glTranslatef(-this->getSizeX2D()/2, 0, 0); |
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130 | |
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131 | // drawing this Text. |
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132 | // setting the Blending effects |
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133 | glColor4f(this->color.x, this->color.y, this->color.z, this->blending); |
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134 | glEnable(GL_BLEND); |
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135 | glEnable(GL_TEXTURE_2D); |
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136 | glBlendFunc(GL_SRC_ALPHA, GL_ONE); |
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137 | |
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138 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, GL_MODULATE ); |
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139 | |
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140 | Glyph** glyphArray; |
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141 | if (likely (this->font != NULL)) |
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142 | { |
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143 | glyphArray = this->font->getGlyphArray(); |
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144 | glBindTexture(GL_TEXTURE_2D, font->getTexture()); |
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145 | } |
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146 | else |
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147 | { |
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148 | if (unlikely(Font::getDefaultFont() == NULL)) |
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149 | Font::initDefaultFont(); |
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150 | glyphArray = Font::getDefaultFont()->getGlyphArray(); |
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151 | glBindTexture(GL_TEXTURE_2D, Font::getDefaultFont()->getTexture()); |
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152 | } |
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153 | if (likely(!this->text.empty())) |
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154 | { |
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155 | glTranslatef(getAbsCoor2D().x, getAbsCoor2D().y, 0); |
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156 | glRotatef(this->getAbsDir2D(), 0, 0, 1); |
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157 | Glyph* tmpGlyph; |
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158 | float posX = 0.0f; |
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159 | |
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160 | glBegin(GL_QUADS); |
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161 | for (unsigned int i = 0; i < this->text.size(); i++) |
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162 | { |
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163 | if(likely((tmpGlyph = glyphArray[this->text[i]]) != NULL)) |
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164 | { |
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165 | glTexCoord2f(tmpGlyph->texCoord[1], tmpGlyph->texCoord[2]); |
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166 | glVertex2d(posX+tmpGlyph->maxX*this->getSizeY2D(), 0); |
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167 | |
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168 | glTexCoord2f(tmpGlyph->texCoord[1], tmpGlyph->texCoord[3]); |
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169 | glVertex2d(posX+tmpGlyph->maxX*this->getSizeY2D(), this->getSizeY2D()); |
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170 | |
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171 | glTexCoord2f(tmpGlyph->texCoord[0], tmpGlyph->texCoord[3]); |
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172 | glVertex2d(posX+tmpGlyph->minX*this->getSizeY2D(), this->getSizeY2D()); |
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173 | |
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174 | glTexCoord2f(tmpGlyph->texCoord[0], tmpGlyph->texCoord[2]); |
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175 | glVertex2d(posX+tmpGlyph->minX*this->getSizeY2D(), 0); |
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176 | |
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177 | posX += tmpGlyph->advance * this->getSizeY2D(); |
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178 | } |
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179 | } |
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180 | glEnd(); |
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181 | } |
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182 | |
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183 | glPopMatrix(); |
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184 | } |
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185 | |
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186 | /** |
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187 | * @brief prints out some nice debug information about this text |
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188 | */ |
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189 | void Text::debug() const |
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190 | { |
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191 | PRINT(0)("=== TEXT: %s ===\n", this->text.c_str()); |
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192 | PRINT(0)("Color: %0.2f %0.2f %0.2f\n", this->color.x, this->color.y, this->color.z); |
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193 | } |
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194 | |
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195 | |
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196 | //////////// |
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197 | /// UTIL /// |
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198 | //////////// |
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199 | /** |
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200 | * @brief Loads a Font from an SDL_surface into a texture. |
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201 | * @param surface The surface to make the texture of |
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202 | * @param texCoord The texture coordinates of the 4 corners of the texture |
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203 | * @returns the ID of the texture |
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204 | */ |
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205 | GLuint Text::loadTexture(SDL_Surface *surface, TexCoord* texCoord) |
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206 | { |
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207 | GLuint texture; |
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208 | int w, h; |
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209 | SDL_Surface *image; |
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210 | SDL_Rect area; |
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211 | Uint32 saved_flags; |
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212 | Uint8 saved_alpha; |
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213 | |
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214 | /* Use the surface width and height expanded to powers of 2 */ |
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215 | w = powerOfTwo(surface->w); |
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216 | h = powerOfTwo(surface->h); |
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217 | if (texCoord != NULL) |
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218 | { |
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219 | texCoord->minU = 0.0f; |
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220 | texCoord->minV = 0.0f; |
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221 | texCoord->maxU = (GLfloat)surface->w / w; |
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222 | texCoord->maxV = (GLfloat)surface->h / h; |
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223 | } |
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224 | image = SDL_CreateRGBSurface(SDL_SWSURFACE, |
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225 | w, h, |
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226 | 32, |
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227 | #if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */ |
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228 | 0x000000FF, |
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229 | 0x0000FF00, |
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230 | 0x00FF0000, |
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231 | 0xFF000000 |
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232 | #else |
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233 | 0xFF000000, |
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234 | 0x00FF0000, |
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235 | 0x0000FF00, |
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236 | 0x000000FF |
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237 | #endif |
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238 | ); |
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239 | if ( image == NULL ) { |
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240 | return 0; |
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241 | } |
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242 | |
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243 | /* Save the alpha blending attributes */ |
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244 | saved_flags = surface->flags&(SDL_SRCALPHA|SDL_RLEACCELOK); |
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245 | saved_alpha = surface->format->alpha; |
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246 | if ( (saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { |
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247 | SDL_SetAlpha(surface, 0, 0); |
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248 | } |
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249 | |
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250 | /* Copy the surface into the GL texture image */ |
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251 | area.x = 0; |
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252 | area.y = 0; |
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253 | area.w = surface->w; |
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254 | area.h = surface->h; |
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255 | SDL_BlitSurface(surface, &area, image, &area); |
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256 | |
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257 | /* Restore the alpha blending attributes */ |
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258 | if ( (saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { |
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259 | SDL_SetAlpha(surface, saved_flags, saved_alpha); |
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260 | } |
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261 | |
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262 | /* Create an OpenGL texture for the image */ |
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263 | glGenTextures(1, &texture); |
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264 | glBindTexture(GL_TEXTURE_2D, texture); |
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265 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
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266 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
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267 | glTexImage2D(GL_TEXTURE_2D, |
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268 | 0, |
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269 | GL_RGBA, |
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270 | w, h, |
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271 | 0, |
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272 | GL_RGBA, |
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273 | GL_UNSIGNED_BYTE, |
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274 | image->pixels); |
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275 | SDL_FreeSurface(image); /* No longer needed the data */ |
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276 | |
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277 | return texture; |
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278 | } |
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279 | |
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280 | /** |
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281 | * @brief Quick utility function for texture creation |
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282 | * @param input an integer |
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283 | * @returns the next bigger 2^n-integer than input |
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284 | */ |
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285 | int Text::powerOfTwo(int input) |
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286 | { |
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287 | int value = 1; |
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288 | |
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289 | while ( value < input ) |
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290 | value <<= 1; |
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291 | return value; |
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292 | } |
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