1 | /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ |
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2 | #include <stdarg.h> |
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3 | #include <string.h> |
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4 | |
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5 | #include <fstream> |
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6 | |
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7 | #include <GL/glew.h> |
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8 | |
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9 | #include <R2/R2Fonts.h> |
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10 | #include <R2/R2FilePath.h> |
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11 | |
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12 | using namespace nv::util; |
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13 | |
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14 | // constants |
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15 | const int c_nFileMagicHeader = 6666; |
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16 | |
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17 | Fonts::Fonts() : |
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18 | _fontIndex(-1), |
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19 | _screenWidth(512), |
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20 | _screenHeight(512) |
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21 | { |
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22 | } |
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23 | |
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24 | Fonts::~Fonts() |
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25 | { |
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26 | for (unsigned index = 0; index < _fonts.size(); ++index) { |
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27 | glDeleteLists(_fonts[index]._displayLists, 256); |
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28 | glDeleteTextures(1, &(_fonts[_fontIndex]. _fontTextureID)); |
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29 | } |
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30 | } |
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31 | |
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32 | void |
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33 | Fonts::setFont(const char *fontName) |
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34 | { |
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35 | if (fontName != NULL) { |
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36 | unsigned int i; |
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37 | for (i = 0; i < _fonts.size(); ++i) { |
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38 | if (strcmp(_fonts[i]._fontName.c_str(), fontName) == 0) { |
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39 | _fontIndex = i; |
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40 | break; |
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41 | } |
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42 | } |
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43 | } |
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44 | } |
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45 | |
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46 | void |
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47 | Fonts::addFont(const char *fontName, const char *fontFileName) |
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48 | { |
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49 | FontAttributes sFont; |
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50 | |
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51 | loadFont(fontName, fontFileName, sFont); |
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52 | initializeFont(sFont); |
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53 | _fonts.push_back(sFont); |
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54 | } |
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55 | |
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56 | void |
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57 | Fonts::draw(const char *pString, ...) const |
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58 | { |
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59 | va_list vlArgs; |
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60 | char szVargsBuffer[1024]; |
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61 | |
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62 | va_start(vlArgs, pString); |
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63 | vsprintf(szVargsBuffer, pString, vlArgs); |
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64 | |
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65 | if (_fontIndex != -1) { |
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66 | int length = strlen(szVargsBuffer); |
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67 | |
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68 | glListBase(_fonts[_fontIndex]._displayLists); |
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69 | glCallLists(length, GL_UNSIGNED_BYTE, |
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70 | reinterpret_cast<const GLvoid*>(szVargsBuffer)); |
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71 | } |
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72 | } |
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73 | |
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74 | void |
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75 | Fonts::begin() |
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76 | { |
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77 | glPushAttrib(GL_TRANSFORM_BIT | GL_ENABLE_BIT); |
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78 | glEnable(GL_TEXTURE_2D); |
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79 | glBindTexture(GL_TEXTURE_2D, _fonts[_fontIndex]._fontTextureID); |
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80 | |
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81 | glMatrixMode(GL_PROJECTION); |
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82 | glPushMatrix(); |
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83 | glLoadIdentity(); |
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84 | |
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85 | gluOrtho2D(0.0f, _screenWidth, _screenHeight, 0.0f); |
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86 | |
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87 | glMatrixMode(GL_MODELVIEW); |
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88 | glPushMatrix(); |
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89 | glLoadIdentity(); |
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90 | |
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91 | glEnable(GL_BLEND); |
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92 | glDisable(GL_DEPTH_TEST); |
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93 | } |
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94 | |
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95 | void |
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96 | Fonts::end() |
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97 | { |
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98 | glBindTexture(GL_TEXTURE_2D, 0); |
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99 | |
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100 | glMatrixMode(GL_PROJECTION); |
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101 | glPopMatrix(); |
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102 | |
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103 | glMatrixMode(GL_MODELVIEW); |
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104 | glPopMatrix(); |
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105 | |
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106 | glPopAttrib(); |
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107 | } |
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108 | |
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109 | void |
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110 | Fonts::initializeFont(FontAttributes& attr) |
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111 | { |
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112 | attr._displayLists = glGenLists(256); |
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113 | |
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114 | int index; |
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115 | for (index = 0; index < 256; ++index) { |
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116 | FontAttributes::CharInfo& charInfo = attr._chars[index]; |
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117 | glNewList(attr._displayLists + index, GL_COMPILE); |
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118 | if (charInfo._valid) { |
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119 | glBegin(GL_TRIANGLE_STRIP); |
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120 | |
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121 | glTexCoord2f(charInfo._left, charInfo._top); |
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122 | glVertex2i(0, 0); |
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123 | |
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124 | glTexCoord2f(charInfo._left, charInfo._bottom); |
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125 | glVertex2i(0, (GLint)attr._fontHeight); |
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126 | |
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127 | glTexCoord2f(charInfo._right, charInfo._top); |
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128 | glVertex2i((GLint)charInfo._width, 0); |
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129 | |
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130 | glTexCoord2f(charInfo._right, charInfo._bottom); |
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131 | glVertex2i((GLint)charInfo._width, (GLint)attr._fontHeight); |
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132 | |
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133 | glEnd(); |
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134 | glTranslatef(charInfo._width, 0.0f, 0.0f); |
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135 | } |
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136 | glEndList(); |
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137 | } |
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138 | } |
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139 | |
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140 | bool |
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141 | Fonts::loadFont(const char *fontName, const char *fontFileName, |
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142 | FontAttributes& sFont) |
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143 | { |
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144 | bool bSuccess = false; |
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145 | |
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146 | std::string path = FilePath::getInstance()->getPath(fontFileName); |
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147 | if (path.empty()) { |
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148 | return false; |
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149 | } |
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150 | std::ifstream fsInput(path.c_str(), std::ios::binary); |
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151 | if (fsInput) { |
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152 | sFont._fontName = fontName; |
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153 | |
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154 | // make sure this file is the correct type by checking the header |
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155 | unsigned int uiFileId = 0; |
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156 | fsInput.read(reinterpret_cast<char*>(&uiFileId), sizeof(unsigned int)); |
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157 | if (uiFileId == (unsigned int)c_nFileMagicHeader) { |
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158 | // read general font/texture dimensions |
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159 | unsigned int uiTextureWidth, uiTextureHeight, uiFontHeight; |
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160 | uiTextureWidth = uiTextureHeight = uiFontHeight = 0; |
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161 | fsInput.read(reinterpret_cast<char*>(&sFont._textureWidth), |
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162 | sizeof(unsigned int)); |
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163 | fsInput.read(reinterpret_cast<char*>(&sFont._textureHeight), |
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164 | sizeof(unsigned int)); |
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165 | fsInput.read(reinterpret_cast<char*>(&sFont._fontHeight), |
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166 | sizeof(unsigned int)); |
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167 | |
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168 | // read dimensions for each character in 256-char ASCII chart |
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169 | for (int i = 0; i < 256; ++i) { |
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170 | unsigned int uiSize = 0; |
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171 | |
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172 | // top |
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173 | fsInput.read(reinterpret_cast<char*>(&uiSize), |
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174 | sizeof(unsigned int)); |
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175 | sFont._chars[i]._top = static_cast<float>(uiSize) / sFont._textureHeight; |
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176 | // left |
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177 | fsInput.read(reinterpret_cast<char*>(&uiSize), sizeof(unsigned int)); |
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178 | sFont._chars[i]._left = static_cast<float>(uiSize) / sFont._textureWidth; |
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179 | // bottom |
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180 | fsInput.read(reinterpret_cast<char*>(&uiSize), sizeof(unsigned int)); |
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181 | sFont._chars[i]._bottom = static_cast<float>(uiSize) / sFont._textureHeight; |
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182 | // right |
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183 | fsInput.read(reinterpret_cast<char*>(&uiSize), sizeof(unsigned int)); |
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184 | sFont._chars[i]._right = static_cast<float>(uiSize) / sFont._textureWidth; |
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185 | // enabled |
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186 | fsInput.read(reinterpret_cast<char*>(&uiSize), sizeof(unsigned int)); |
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187 | sFont._chars[i]._valid = (uiSize != 0); |
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188 | // width factor |
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189 | float fWidthFactor = 1.0f; |
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190 | fsInput.read(reinterpret_cast<char*>(&fWidthFactor), sizeof(float)); |
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191 | sFont._chars[i]._width = fWidthFactor * sFont._fontHeight; |
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192 | } |
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193 | } |
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194 | |
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195 | // allocate and read the texture map |
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196 | if (!fsInput.eof() && !fsInput.fail()) { |
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197 | unsigned int uiArea = sFont._textureWidth * sFont._textureHeight; |
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198 | unsigned char *pRawMap = new unsigned char[uiArea]; |
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199 | fsInput.read(reinterpret_cast<char *>(pRawMap), uiArea); |
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200 | |
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201 | // we've only read the luminance values, but we need a luminance + |
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202 | // alpha buffer, so we make a new buffer and duplicate the |
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203 | // luminance values |
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204 | unsigned char *pTexMap = new unsigned char[2 * uiArea]; |
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205 | unsigned char *pMap = pTexMap; |
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206 | for (unsigned int i = 0; i < uiArea; ++i) { |
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207 | *pMap++ = pRawMap[i]; |
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208 | *pMap++ = pRawMap[i]; |
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209 | } |
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210 | delete[] pRawMap; |
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211 | pRawMap = NULL; |
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212 | |
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213 | // make texture map out of new buffer |
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214 | glGenTextures(1, &sFont._fontTextureID); |
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215 | glBindTexture(GL_TEXTURE_2D, sFont._fontTextureID); |
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216 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, |
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217 | sFont._textureWidth, sFont._textureHeight, 0, |
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218 | GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, pTexMap); |
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219 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
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220 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
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221 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
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222 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
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223 | glBindTexture(GL_TEXTURE_2D, 0); |
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224 | |
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225 | delete[] pTexMap; |
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226 | pTexMap = NULL; |
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227 | |
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228 | bSuccess = true; |
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229 | } |
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230 | |
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231 | fsInput.close(); |
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232 | } |
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233 | return bSuccess; |
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234 | } |
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235 | |
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236 | void |
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237 | Fonts::resize(int width, int height) |
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238 | { |
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239 | _screenWidth = width; |
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240 | _screenHeight = height; |
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241 | } |
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242 | |
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