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 | for some fonts and licenses visit: =http://www.dafont.com/en/font.php= |
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16 | |
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17 | !! IMPORTANT !! When using ttf fonts clear the license issues prior to |
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18 | adding them to orxonox. This is really important, because we do not |
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19 | want to offend anyone. |
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20 | */ |
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21 | |
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22 | #define DEBUG_SPECIAL_MODULE DEBUG_MODULE_FONT |
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23 | |
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24 | #include "text_engine.h" |
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25 | |
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26 | using namespace std; |
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27 | |
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28 | #include <stdlib.h> |
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29 | #include <stdio.h> |
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30 | #include <string.h> |
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31 | |
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32 | #include "graphics_engine.h" |
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33 | #include "p_node.h" |
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34 | #include "vector.h" |
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35 | #include "debug.h" |
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36 | |
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37 | |
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38 | //////////// |
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39 | /// TEXT /// |
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40 | //////////// |
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41 | |
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42 | Text::Text(void) |
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43 | { |
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44 | |
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45 | } |
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46 | |
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47 | Text::~Text(void) |
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48 | { |
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49 | |
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50 | } |
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51 | |
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52 | |
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53 | void Text::setBindNode(PNode* bindNode) |
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54 | { |
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55 | this->bindNode = bindNode; |
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56 | } |
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57 | |
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58 | /** |
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59 | \brief sets the Type of this Text |
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60 | \param type the type to set. |
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61 | */ |
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62 | void Text::setType(int type) |
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63 | { |
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64 | this->type = type; |
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65 | } |
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66 | |
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67 | |
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68 | /** |
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69 | \brief Sets a new Text to the font |
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70 | \param text the new text to set |
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71 | */ |
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72 | void Text::setText(const char* text) |
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73 | { |
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74 | if (this->text) |
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75 | delete []this->text; |
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76 | this->text = new char[strlen(text)+1]; |
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77 | strcpy(this->text, text); |
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78 | } |
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79 | |
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80 | /** |
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81 | \brief sets a Position. |
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82 | \param x the x-position in pixels from the left border |
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83 | \param y the y-position in pixels from the top border |
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84 | */ |
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85 | void Text::setPosition(int x, int y) |
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86 | { |
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87 | this->posSize.x = x; |
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88 | this->posSize.y = y; |
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89 | } |
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90 | |
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91 | |
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92 | /** |
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93 | \brief draws the Font |
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94 | \todo FIX this is to slow/static |
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95 | */ |
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96 | void Text::draw(void) |
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97 | { |
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98 | // storing all the Transformation Matrices. |
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99 | |
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100 | GLdouble modMat[16]; |
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101 | GLdouble projMat[16]; |
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102 | GLint viewPort[4]; |
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103 | glGetDoublev(GL_PROJECTION_MATRIX, projMat); |
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104 | glGetDoublev(GL_MODELVIEW_MATRIX, modMat); |
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105 | glGetIntegerv(GL_VIEWPORT, viewPort); |
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106 | // this->enter2DMode(); |
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107 | |
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108 | |
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109 | // setting the Position of this Text. |
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110 | Vector pos; |
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111 | if (this->bindNode) |
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112 | { |
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113 | GLdouble x = this->bindNode->getAbsCoor().x; |
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114 | GLdouble y = this->bindNode->getAbsCoor().y; |
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115 | GLdouble z = this->bindNode->getAbsCoor().z; |
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116 | GLdouble tmp[3]; |
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117 | gluProject(x, y, z, modMat, projMat, viewPort, tmp, tmp+1, tmp+2); |
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118 | printf("test %f %f %f,\n", tmp[0], tmp[1], tmp[2]); |
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119 | pos.x = tmp[0] + this->posSize.x; |
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120 | pos.y = GraphicsEngine::getInstance()->getResolutionY() - tmp[1] + this->posSize.y; |
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121 | pos.z = tmp[2]; |
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122 | } |
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123 | else |
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124 | { |
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125 | pos.x = this->posSize.x; |
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126 | pos.y = this->posSize.y; |
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127 | pos.z = 0; |
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128 | } |
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129 | |
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130 | // drawing this Text. |
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131 | if(type == TEXT_STATIC) |
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132 | { |
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133 | glBindTexture(GL_TEXTURE_2D, this->texture); |
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134 | glEnable(GL_TEXTURE_2D); |
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135 | glBegin(GL_QUADS); |
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136 | |
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137 | glTexCoord2f(this->texCoord.minU, this->texCoord.minV); |
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138 | glVertex2i(pos.x, pos.y ); |
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139 | |
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140 | glTexCoord2f(this->texCoord.maxU, this->texCoord.minV); |
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141 | glVertex2i(pos.x + this->posSize.w, pos.y ); |
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142 | |
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143 | glTexCoord2f(this->texCoord.maxU, this->texCoord.maxV); |
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144 | glVertex2i(pos.x + this->posSize.w, pos.y + this->posSize.h); |
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145 | |
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146 | glTexCoord2f(this->texCoord.minU, this->texCoord.maxV); |
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147 | glVertex2i(pos.x, pos.y + this->posSize.h); |
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148 | |
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149 | glEnd(); |
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150 | } |
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151 | else //(if type & TEXT_DYNAMIC) |
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152 | { |
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153 | Glyph** glyphArray = this->font->getGlyphArray(); |
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154 | glBindTexture(GL_TEXTURE_2D, this->font->getFastTextureID()); |
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155 | // glEnable(GL_TEXTURE_2D); |
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156 | glTranslatef(pos.x, pos.y, 0); |
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157 | |
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158 | printf("%d, %d\n", this->font->getFastTextureID(), glyphArray[65]->displayList); |
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159 | char* tmpText = this->text; |
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160 | while (*tmpText != '\0') |
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161 | { |
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162 | if(glyphArray[*tmpText]) |
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163 | { |
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164 | glCallList(glyphArray[*tmpText]->displayList); |
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165 | glTranslatef(glyphArray[*tmpText]->width, 0, 0); |
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166 | } |
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167 | tmpText++; |
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168 | } |
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169 | } |
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170 | // this->leave2DMode(); |
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171 | } |
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172 | |
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173 | |
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174 | |
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175 | //////////// |
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176 | /// FONT /// |
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177 | //////////// |
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178 | /** |
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179 | \brief constructs a Font |
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180 | \param fontFile the File to load the font from |
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181 | \param fontSize the Size of the Font in Pixels |
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182 | \param r Red value of the Font. |
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183 | \param g Green value of the Font. |
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184 | \param b Blue value of the Font. |
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185 | */ |
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186 | Font::Font(const char* fontFile, unsigned int fontSize, Uint8 r, Uint8 g, Uint8 b) |
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187 | { |
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188 | if (!TTF_WasInit()) |
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189 | TextEngine::enableFonts(); |
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190 | |
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191 | // setting default values. |
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192 | this->font = NULL; |
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193 | this->fontFile = NULL; |
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194 | this->glyphArray = NULL; |
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195 | this->fastTextureID = 0; |
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196 | |
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197 | this->currentText = new Text; |
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198 | |
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199 | this->currentText->bindNode = NULL; |
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200 | this->currentText->text = NULL; |
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201 | this->currentText->texture = 0; |
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202 | |
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203 | this->setSize(fontSize); |
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204 | this->setStyle(TTF_STYLE_NORMAL); |
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205 | this->setFont(fontFile); |
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206 | |
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207 | |
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208 | this->currentText->setType(TEXT_DYNAMIC); |
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209 | this->currentText->setPosition(0, 0); |
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210 | |
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211 | this->currentText->setText(FONT_DEFAULT_TEXT); |
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212 | |
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213 | this->setColor(r, g, b); |
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214 | |
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215 | this->createTexture(); |
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216 | |
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217 | this->fastTextureID = this->createFastTexture(); |
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218 | } |
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219 | |
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220 | /** |
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221 | \brief destructs a font |
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222 | */ |
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223 | Font::~Font(void) |
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224 | { |
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225 | delete this->currentText; |
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226 | |
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227 | if (this->glyphArray) |
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228 | { |
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229 | for (int i = 0; i < FONT_HIGHEST_KNOWN_CHAR; i++) |
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230 | delete this->glyphArray[i]; |
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231 | delete []this->glyphArray; |
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232 | } |
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233 | |
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234 | if (this->font) |
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235 | TTF_CloseFont(this->font); |
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236 | } |
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237 | |
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238 | /** |
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239 | \brief sets The Font. |
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240 | \param fontFile The file containing the font. |
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241 | \returns true if loaded, false if something went wrong, or if a font was loaded before. |
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242 | */ |
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243 | bool Font::setFont(const char* fontFile) |
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244 | { |
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245 | if (!this->fontFile) |
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246 | { |
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247 | this->fontFile = new char[strlen(fontFile)+1]; |
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248 | strcpy(this->fontFile, fontFile); |
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249 | |
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250 | this->font = TTF_OpenFont(this->fontFile, this->fontSize); |
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251 | if(!this->font) |
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252 | { |
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253 | PRINTF(1)("TTF_OpenFont: %s\n", TTF_GetError()); |
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254 | return false; |
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255 | } |
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256 | return true; |
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257 | } |
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258 | else |
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259 | { |
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260 | PRINTF(2)("Font already initialized, unable to change it now.\n"); |
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261 | return false; |
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262 | } |
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263 | } |
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264 | |
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265 | /** |
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266 | \brief sets a specific renderStyle |
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267 | \param renderStyle the Style to render: a char-array containing: |
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268 | i: italic, b: bold, u, underline |
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269 | */ |
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270 | void Font::setStyle(char* renderStyle) |
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271 | { |
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272 | this->renderStyle = TTF_STYLE_NORMAL; |
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273 | |
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274 | for (int i = 0; i < strlen(renderStyle); i++) |
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275 | if (strncmp(renderStyle+i, "b", 1) == 0) |
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276 | this->renderStyle |= TTF_STYLE_BOLD; |
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277 | else if (strncmp(renderStyle+i, "i", 1) == 0) |
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278 | this->renderStyle |= TTF_STYLE_ITALIC; |
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279 | else if (strncmp(renderStyle+i, "u", 1) == 0) |
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280 | this->renderStyle |= TTF_STYLE_UNDERLINE; |
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281 | |
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282 | if (this->font) |
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283 | TTF_SetFontStyle(this->font, this->renderStyle); |
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284 | else |
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285 | PRINTF(2)("Font was not initialized, please do so before setting the Font-Style.\n"); |
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286 | } |
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287 | |
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288 | |
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289 | |
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290 | /** |
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291 | \brief Sets a new Size to the font |
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292 | \param fontSize The new Size in pixels. |
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293 | */ |
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294 | void Font::setSize(unsigned int fontSize) |
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295 | { |
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296 | this->fontSize = fontSize; |
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297 | } |
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298 | |
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299 | /** |
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300 | \brief sets a new color to the font |
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301 | \param r Red |
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302 | \param g Green |
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303 | \param b Blue |
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304 | */ |
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305 | void Font::setColor(Uint8 r, Uint8 g, Uint8 b) |
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306 | { |
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307 | this->currentText->color.r = r; |
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308 | this->currentText->color.g = g; |
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309 | this->currentText->color.b = b; |
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310 | } |
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311 | |
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312 | /** |
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313 | \brief creates a texture out of the given parameters |
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314 | |
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315 | this has to be called every time by the user, to if changes were made. |
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316 | */ |
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317 | void Font::createTexture(void) |
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318 | { |
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319 | SDL_Surface* tmpSurf; |
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320 | if (this->currentText->texture) |
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321 | glDeleteTextures(1, &this->currentText->texture); |
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322 | tmpSurf = TTF_RenderText_Blended(this->font, |
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323 | this->currentText->text, |
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324 | this->currentText->color); |
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325 | if (tmpSurf) |
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326 | this->currentText->texture = loadTexture(tmpSurf, &this->currentText->texCoord); |
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327 | |
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328 | this->currentText->posSize.w = tmpSurf->w; |
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329 | this->currentText->posSize.h = tmpSurf->h; |
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330 | SDL_FreeSurface(tmpSurf); |
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331 | } |
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332 | |
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333 | |
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334 | /** |
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335 | \returns the maximum height of the Font, if the font was initialized, 0 otherwise |
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336 | */ |
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337 | int Font::getMaxHeight(void) |
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338 | { |
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339 | if (this->font) |
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340 | return TTF_FontHeight(this->font); |
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341 | else |
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342 | return 0; |
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343 | } |
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344 | |
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345 | /** |
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346 | \returns the maximum ascent of the Font, if the font was initialized, 0 otherwise |
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347 | |
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348 | the ascent is the pixels of the font above the baseline |
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349 | */ |
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350 | int Font::getMaxAscent(void) |
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351 | { |
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352 | if (this->font) |
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353 | return TTF_FontAscent(this->font); |
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354 | else |
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355 | return 0; |
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356 | } |
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357 | |
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358 | /** |
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359 | \returns the maximum descent of the Font, if the font was initialized, 0 otherwise |
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360 | |
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361 | the descent is the pixels of the font below the baseline |
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362 | */ |
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363 | int Font::getMaxDescent(void) |
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364 | { |
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365 | if (this->font) |
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366 | return TTF_FontDescent(this->font); |
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367 | else |
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368 | return 0; |
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369 | } |
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370 | |
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371 | /** |
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372 | \param character The character to get info about. |
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373 | \returns a Glyph struct of a character. This Glyph is a pointer, |
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374 | and MUST be deleted by the user.. |
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375 | |
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376 | This only works for horizontal fonts. see |
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377 | http://freetype.sourceforge.net/freetype2/docs/tutorial/step2.html |
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378 | for more info about vertical Fonts |
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379 | */ |
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380 | Glyph* Font::getGlyphMetrics(Uint16 character) |
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381 | { |
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382 | Glyph* rg = new Glyph; |
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383 | rg->character = character; |
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384 | TTF_GlyphMetrics(this->font, rg->character, |
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385 | &rg->minX, &rg->maxX, |
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386 | &rg->minY, &rg->maxY, |
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387 | &rg->advance); |
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388 | rg->height = rg->maxY - rg->minY; |
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389 | rg->width = rg->maxX - rg->minX; |
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390 | rg->bearingX = (rg->advance - rg->width) / 2; |
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391 | rg->bearingY = rg->maxY; |
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392 | return rg; |
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393 | } |
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394 | |
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395 | /** |
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396 | \brief entering 2D Mode |
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397 | |
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398 | this is a GL-Projection-mode, that is orthogonal, for placing the font in fron of everything else |
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399 | */ |
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400 | void Font::enter2DMode(void) |
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401 | { |
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402 | SDL_Surface *screen = SDL_GetVideoSurface(); |
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403 | |
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404 | /* Note, there may be other things you need to change, |
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405 | depending on how you have your OpenGL state set up. |
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406 | */ |
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407 | glPushAttrib(GL_ENABLE_BIT); |
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408 | glDisable(GL_DEPTH_TEST); |
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409 | glDisable(GL_CULL_FACE); |
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410 | glDisable(GL_LIGHTING); // will be set back when leaving 2D-mode |
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411 | glEnable(GL_TEXTURE_2D); |
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412 | |
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413 | /* This allows alpha blending of 2D textures with the scene */ |
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414 | glEnable(GL_BLEND); |
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415 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
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416 | |
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417 | glViewport(0, 0, screen->w, screen->h); |
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418 | |
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419 | glMatrixMode(GL_PROJECTION); |
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420 | glPushMatrix(); |
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421 | glLoadIdentity(); |
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422 | |
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423 | glOrtho(0.0, (GLdouble)screen->w, (GLdouble)screen->h, 0.0, 0.0, 1.0); |
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424 | |
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425 | glMatrixMode(GL_MODELVIEW); |
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426 | glPushMatrix(); |
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427 | glLoadIdentity(); |
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428 | |
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429 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
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430 | } |
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431 | |
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432 | /** |
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433 | \brief leaves the 2DMode again also \see Font::enter2DMode(void) |
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434 | */ |
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435 | void Font::leave2DMode(void) |
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436 | { |
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437 | glMatrixMode(GL_MODELVIEW); |
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438 | glPopMatrix(); |
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439 | |
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440 | glMatrixMode(GL_PROJECTION); |
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441 | glPopMatrix(); |
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442 | |
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443 | glPopAttrib(); |
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444 | } |
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445 | |
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446 | |
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447 | GLuint Font::createFastTexture(void) |
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448 | { |
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449 | /* interesting GLYPHS: |
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450 | * 33-47: Special Characters. |
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451 | * 48-57: 0-9 |
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452 | * 58-63: some more special chars (minor) |
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453 | * 65-90: A-Z |
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454 | * 97-122: a-z |
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455 | */ |
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456 | int numberOfGlyphs = 90; |
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457 | |
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458 | this->initGlyphs(33, numberOfGlyphs); |
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459 | |
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460 | int rectSize = this->findOptimalFastTextureSize(); |
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461 | |
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462 | // setting default values. (maybe not needed afterwards) |
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463 | SDL_Color tmpColor; tmpColor.r = tmpColor.g = tmpColor.b = 0; |
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464 | // Surface definition. |
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465 | SDL_Rect tmpRect; // this represents a Rectangle for blitting. |
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466 | SDL_Surface* tmpSurf = SDL_CreateRGBSurface(SDL_SWSURFACE, |
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467 | rectSize, rectSize, |
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468 | 32, |
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469 | #if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */ |
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470 | 0x000000FF, |
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471 | 0x0000FF00, |
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472 | 0x00FF0000, |
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473 | 0xFF000000 |
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474 | #else |
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475 | 0xFF000000, |
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476 | 0x00FF0000, |
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477 | 0x0000FF00, |
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478 | 0x000000FF |
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479 | #endif |
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480 | ); |
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481 | tmpRect.x = 0; tmpRect.y = 0; tmpRect.w = tmpSurf->w; tmpRect.h = tmpSurf->h; |
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482 | SDL_SetClipRect(tmpSurf, &tmpRect); |
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483 | int maxLineHeight = 0; |
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484 | |
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485 | // all the interessting Glyphs |
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486 | for (int i = 33; i <= 122; i++) |
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487 | { |
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488 | SDL_Surface* glyphSurf = NULL; |
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489 | Glyph* tmpGlyph; |
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490 | |
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491 | if (tmpGlyph = this->glyphArray[i]) |
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492 | { |
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493 | if (tmpGlyph->height > maxLineHeight) |
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494 | maxLineHeight = tmpGlyph->height; |
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495 | |
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496 | if (tmpRect.x+tmpGlyph->width > tmpSurf->w) |
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497 | { |
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498 | tmpRect.x = 0; |
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499 | tmpRect.y = tmpRect.y + maxLineHeight + 1; |
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500 | maxLineHeight = 0; |
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501 | } |
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502 | if (tmpRect.y + maxLineHeight > tmpSurf->h) |
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503 | { |
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504 | PRINTF(1)("Protection, so font cannot write over the boundraries error (this should not heappen\n"); |
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505 | break; |
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506 | } |
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507 | // reading in the new Glyph |
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508 | //glyphSurf = TTF_RenderGlyph_Shaded(this->font, i, this->currentText->color, tmpColor); |
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509 | glyphSurf = TTF_RenderGlyph_Blended(this->font, i, this->currentText->color); |
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510 | if( glyphSurf ) |
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511 | { |
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512 | |
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513 | SDL_SetAlpha(glyphSurf, 0, 0); |
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514 | |
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515 | SDL_BlitSurface(glyphSurf, NULL, tmpSurf, &tmpRect); |
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516 | TexCoord tmpTexCoord; |
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517 | tmpTexCoord.minU = (float)tmpRect.x/(float)tmpSurf->w; |
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518 | tmpTexCoord.maxU = (float)(tmpRect.x+tmpGlyph->width)/(float)tmpSurf->w; |
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519 | tmpTexCoord.minV = (float)tmpRect.y/(float)tmpSurf->w; |
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520 | tmpTexCoord.maxV = (float)(tmpRect.y+tmpGlyph->height)/(float)tmpSurf->w; |
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521 | tmpGlyph->displayList = glGenLists(1); |
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522 | |
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523 | glNewList(tmpGlyph->displayList, GL_COMPILE); |
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524 | glBegin(GL_QUADS); |
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525 | glTexCoord2f(tmpTexCoord.minU, tmpTexCoord.minV); |
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526 | glVertex2d(0, 0); |
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527 | glTexCoord2f(tmpTexCoord.minU, tmpTexCoord.maxV); |
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528 | glVertex2d(0, tmpGlyph->height); |
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529 | glTexCoord2f(tmpTexCoord.maxU, tmpTexCoord.maxV); |
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530 | glVertex2d(tmpGlyph->width, tmpGlyph->height); |
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531 | glTexCoord2f(tmpTexCoord.maxU, tmpTexCoord.minV); |
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532 | glVertex2d(tmpGlyph->width, 0); |
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533 | glEnd(); |
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534 | glEndList(); |
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535 | SDL_FreeSurface(glyphSurf); |
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536 | |
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537 | tmpRect.x += tmpGlyph->width + 1; |
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538 | |
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539 | // Outputting Glyphs to BMP-files. |
---|
540 | /* |
---|
541 | char outname[64]; |
---|
542 | if (i < 10) |
---|
543 | sprintf( outname, "glyph-00%d.bmp", i ); |
---|
544 | else if (i <100) |
---|
545 | sprintf( outname, "glyph-0%d.bmp", i ); |
---|
546 | else |
---|
547 | sprintf( outname, "glyph-%d.bmp", i ); |
---|
548 | SDL_SaveBMP(tmpSurf, outname); |
---|
549 | */ |
---|
550 | } |
---|
551 | } |
---|
552 | } |
---|
553 | GLuint texture; |
---|
554 | glGenTextures(1, &texture); |
---|
555 | glBindTexture(GL_TEXTURE_2D, texture); |
---|
556 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
---|
557 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
558 | glTexImage2D(GL_TEXTURE_2D, |
---|
559 | 0, |
---|
560 | GL_RGBA, |
---|
561 | tmpSurf->w, tmpSurf->h, |
---|
562 | 0, |
---|
563 | GL_RGBA, |
---|
564 | GL_UNSIGNED_BYTE, |
---|
565 | tmpSurf->pixels); |
---|
566 | SDL_FreeSurface(tmpSurf); |
---|
567 | return texture; |
---|
568 | } |
---|
569 | |
---|
570 | /** |
---|
571 | \brief Loads a Font from an SDL_surface into a texture. |
---|
572 | \param surface The surface to make the texture of |
---|
573 | \param texCoord The texture coordinates of the 4 corners of the texture |
---|
574 | \returns the ID of the texture |
---|
575 | */ |
---|
576 | GLuint Font::loadTexture(SDL_Surface *surface, TexCoord* texCoord) |
---|
577 | { |
---|
578 | GLuint texture; |
---|
579 | int w, h; |
---|
580 | SDL_Surface *image; |
---|
581 | SDL_Rect area; |
---|
582 | Uint32 saved_flags; |
---|
583 | Uint8 saved_alpha; |
---|
584 | |
---|
585 | /* Use the surface width and height expanded to powers of 2 */ |
---|
586 | w = powerOfTwo(surface->w); |
---|
587 | h = powerOfTwo(surface->h); |
---|
588 | if (texCoord) |
---|
589 | { |
---|
590 | texCoord->minU = 0.0f; |
---|
591 | texCoord->minV = 0.0f; |
---|
592 | texCoord->maxU = (GLfloat)surface->w / w; |
---|
593 | texCoord->maxV = (GLfloat)surface->h / h; |
---|
594 | } |
---|
595 | image = SDL_CreateRGBSurface(SDL_SWSURFACE, |
---|
596 | w, h, |
---|
597 | 32, |
---|
598 | #if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */ |
---|
599 | 0x000000FF, |
---|
600 | 0x0000FF00, |
---|
601 | 0x00FF0000, |
---|
602 | 0xFF000000 |
---|
603 | #else |
---|
604 | 0xFF000000, |
---|
605 | 0x00FF0000, |
---|
606 | 0x0000FF00, |
---|
607 | 0x000000FF |
---|
608 | #endif |
---|
609 | ); |
---|
610 | if ( image == NULL ) { |
---|
611 | return 0; |
---|
612 | } |
---|
613 | |
---|
614 | /* Save the alpha blending attributes */ |
---|
615 | saved_flags = surface->flags&(SDL_SRCALPHA|SDL_RLEACCELOK); |
---|
616 | saved_alpha = surface->format->alpha; |
---|
617 | if ( (saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { |
---|
618 | SDL_SetAlpha(surface, 0, 0); |
---|
619 | } |
---|
620 | |
---|
621 | /* Copy the surface into the GL texture image */ |
---|
622 | area.x = 0; |
---|
623 | area.y = 0; |
---|
624 | area.w = surface->w; |
---|
625 | area.h = surface->h; |
---|
626 | SDL_BlitSurface(surface, &area, image, &area); |
---|
627 | |
---|
628 | /* Restore the alpha blending attributes */ |
---|
629 | if ( (saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { |
---|
630 | SDL_SetAlpha(surface, saved_flags, saved_alpha); |
---|
631 | } |
---|
632 | |
---|
633 | /* Create an OpenGL texture for the image */ |
---|
634 | glGenTextures(1, &texture); |
---|
635 | glBindTexture(GL_TEXTURE_2D, texture); |
---|
636 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
---|
637 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
638 | glTexImage2D(GL_TEXTURE_2D, |
---|
639 | 0, |
---|
640 | GL_RGBA, |
---|
641 | w, h, |
---|
642 | 0, |
---|
643 | GL_RGBA, |
---|
644 | GL_UNSIGNED_BYTE, |
---|
645 | image->pixels); |
---|
646 | SDL_FreeSurface(image); /* No longer needed */ |
---|
647 | |
---|
648 | return texture; |
---|
649 | } |
---|
650 | |
---|
651 | /** |
---|
652 | \brief stores Glyph Metrics in an Array. |
---|
653 | \param from The Glyph to start from. |
---|
654 | \param count The number of Glyphs to start From. |
---|
655 | */ |
---|
656 | void Font::initGlyphs(Uint16 from, Uint16 count) |
---|
657 | { |
---|
658 | /* initialize the Array, and set all its entries to NULL |
---|
659 | * only if the Glyph-array has not been initialized |
---|
660 | */ |
---|
661 | if (!this->glyphArray) |
---|
662 | { |
---|
663 | this->glyphArray = new Glyph*[FONT_HIGHEST_KNOWN_CHAR]; |
---|
664 | for (int i = 0; i < FONT_HIGHEST_KNOWN_CHAR; i++) |
---|
665 | this->glyphArray[i] = NULL; |
---|
666 | } |
---|
667 | |
---|
668 | Uint16 lastGlyph = from + count; |
---|
669 | |
---|
670 | for (int i = from; i <= lastGlyph; i++) |
---|
671 | { |
---|
672 | // setting up all the Glyphs we like. |
---|
673 | glyphArray[i] = getGlyphMetrics(i); |
---|
674 | } |
---|
675 | return; |
---|
676 | } |
---|
677 | |
---|
678 | /** |
---|
679 | \returns the optimal size to use as the texture size |
---|
680 | |
---|
681 | \todo: this algorithm can be a lot more faster, althought it does |
---|
682 | not really matter within the init-context, and 128 glyphs. |
---|
683 | |
---|
684 | This function searches for a 2^n sizes texture-size, this is for |
---|
685 | openGL-version < 1.2 compatibility. and because it is realy easy like this. |
---|
686 | */ |
---|
687 | int Font::findOptimalFastTextureSize(void) |
---|
688 | { |
---|
689 | int i; |
---|
690 | int x,y; // the counters |
---|
691 | int maxLineHeight; |
---|
692 | int size = 32; // starting Value, we have to start somewhere 32 seems reasonable. |
---|
693 | bool sizeOK = false; |
---|
694 | Glyph* tmpGlyph; |
---|
695 | |
---|
696 | while (!sizeOK) |
---|
697 | { |
---|
698 | x = 0; y = 0; |
---|
699 | maxLineHeight = 0; |
---|
700 | for (i = 0; i < FONT_HIGHEST_KNOWN_CHAR; i++) |
---|
701 | { |
---|
702 | if(tmpGlyph = this->glyphArray[i]) |
---|
703 | { |
---|
704 | // getting the height of the highest Glyph in the Line. |
---|
705 | if (tmpGlyph->height > maxLineHeight) |
---|
706 | maxLineHeight = tmpGlyph->height; |
---|
707 | |
---|
708 | if (x + tmpGlyph->width > size) |
---|
709 | { |
---|
710 | x = 0; |
---|
711 | y = y + maxLineHeight; |
---|
712 | maxLineHeight = 0; |
---|
713 | } |
---|
714 | if (y + maxLineHeight + 1 > size) |
---|
715 | break; |
---|
716 | x += tmpGlyph->width + 1; |
---|
717 | |
---|
718 | } |
---|
719 | } |
---|
720 | if (i == FONT_HIGHEST_KNOWN_CHAR) |
---|
721 | sizeOK = true; |
---|
722 | else |
---|
723 | size *= 2; |
---|
724 | } |
---|
725 | return size; |
---|
726 | |
---|
727 | } |
---|
728 | |
---|
729 | /** |
---|
730 | \brief Quick utility function for texture creation |
---|
731 | \param input an integer |
---|
732 | \returns the next bigger 2^n-integer than input |
---|
733 | */ |
---|
734 | int Font::powerOfTwo(int input) |
---|
735 | { |
---|
736 | int value = 1; |
---|
737 | |
---|
738 | while ( value < input ) { |
---|
739 | value <<= 1; |
---|
740 | } |
---|
741 | return value; |
---|
742 | } |
---|
743 | |
---|
744 | |
---|
745 | |
---|
746 | /** |
---|
747 | \brief a simple function to get some interesting information about this class |
---|
748 | */ |
---|
749 | void Font::debug(void) |
---|
750 | { |
---|
751 | |
---|
752 | // print the loaded font's style |
---|
753 | int style; |
---|
754 | style=TTF_GetFontStyle(this->font); |
---|
755 | PRINTF(0)("The font style is:"); |
---|
756 | if(style==TTF_STYLE_NORMAL) |
---|
757 | PRINTF(0)(" normal"); |
---|
758 | else { |
---|
759 | if(style&TTF_STYLE_BOLD) |
---|
760 | PRINTF(0)(" bold"); |
---|
761 | if(style&TTF_STYLE_ITALIC) |
---|
762 | PRINTF(0)(" italic"); |
---|
763 | if(style&TTF_STYLE_UNDERLINE) |
---|
764 | PRINTF(0)(" underline"); |
---|
765 | } |
---|
766 | PRINTF(0)("\n"); |
---|
767 | |
---|
768 | |
---|
769 | } |
---|
770 | |
---|
771 | |
---|
772 | |
---|
773 | |
---|
774 | |
---|
775 | |
---|
776 | |
---|
777 | |
---|
778 | |
---|
779 | /////////////////// |
---|
780 | /// TEXT-ENGINE /// |
---|
781 | /////////////////// |
---|
782 | /** |
---|
783 | \brief standard constructor |
---|
784 | */ |
---|
785 | TextEngine::TextEngine () |
---|
786 | { |
---|
787 | this->setClassName ("TextEngine"); |
---|
788 | |
---|
789 | } |
---|
790 | |
---|
791 | /** |
---|
792 | \brief the singleton reference to this class |
---|
793 | */ |
---|
794 | TextEngine* TextEngine::singletonRef = NULL; |
---|
795 | |
---|
796 | /** |
---|
797 | \returns a Pointer to this Class |
---|
798 | */ |
---|
799 | TextEngine* TextEngine::getInstance(void) |
---|
800 | { |
---|
801 | if (!TextEngine::singletonRef) |
---|
802 | TextEngine::singletonRef = new TextEngine(); |
---|
803 | return TextEngine::singletonRef; |
---|
804 | } |
---|
805 | |
---|
806 | /** |
---|
807 | \brief standard deconstructor |
---|
808 | |
---|
809 | */ |
---|
810 | TextEngine::~TextEngine () |
---|
811 | { |
---|
812 | TextEngine::singletonRef = NULL; |
---|
813 | |
---|
814 | } |
---|
815 | |
---|
816 | /** |
---|
817 | \brief function to enable TTF_Fonts |
---|
818 | */ |
---|
819 | void TextEngine::enableFonts(void) |
---|
820 | { |
---|
821 | if (!TTF_WasInit()) |
---|
822 | { |
---|
823 | if(TTF_Init()==-1) |
---|
824 | PRINTF(1)("TTF_Init: %s\n", TTF_GetError()); |
---|
825 | |
---|
826 | TextEngine::checkVersion(); |
---|
827 | } |
---|
828 | else |
---|
829 | PRINTF(4)("Fonts already initialized\n"); |
---|
830 | |
---|
831 | } |
---|
832 | |
---|
833 | /** |
---|
834 | \brief function to disable TTF_fonts |
---|
835 | */ |
---|
836 | void TextEngine::disableFonts(void) |
---|
837 | { |
---|
838 | if (TTF_WasInit()) |
---|
839 | { |
---|
840 | TTF_Quit(); |
---|
841 | } |
---|
842 | else |
---|
843 | PRINTF(4)("Fonts were not initialized.\n"); |
---|
844 | } |
---|
845 | |
---|
846 | /** |
---|
847 | \brief checks if the compiled version and the local version of SDL_ttf match. |
---|
848 | \returns true if match, false otherwise |
---|
849 | */ |
---|
850 | bool TextEngine::checkVersion(void) |
---|
851 | { |
---|
852 | SDL_version compile_version; |
---|
853 | SDL_version link_version; |
---|
854 | TTF_VERSION(&compile_version); |
---|
855 | link_version = *TTF_Linked_Version(); |
---|
856 | |
---|
857 | if (compile_version.major == link_version.major && |
---|
858 | compile_version.minor == link_version.minor && |
---|
859 | compile_version.patch == link_version.patch) |
---|
860 | { |
---|
861 | return true; |
---|
862 | } |
---|
863 | else |
---|
864 | { |
---|
865 | PRINTF(2)("compiled with SDL_ttf version: %d.%d.%d\n", |
---|
866 | compile_version.major, |
---|
867 | compile_version.minor, |
---|
868 | compile_version.patch); |
---|
869 | |
---|
870 | PRINTF(2)("running with SDL_ttf version: %d.%d.%d\n", |
---|
871 | link_version.major, |
---|
872 | link_version.minor, |
---|
873 | link_version.patch); |
---|
874 | return false; |
---|
875 | } |
---|
876 | } |
---|