Mercurial > hg > orthanc
annotate Core/Images/Font.cpp @ 3812:abd3a1d114c0 transcoding
transcoding to 1.2.840.10008.1.2.4.51
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 07 Apr 2020 13:54:57 +0200 |
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1 /** |
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2 * Orthanc - A Lightweight, RESTful DICOM Store |
1900 | 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium |
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6 * |
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7 * This program is free software: you can redistribute it and/or |
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8 * modify it under the terms of the GNU General Public License as |
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9 * published by the Free Software Foundation, either version 3 of the |
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10 * License, or (at your option) any later version. |
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11 * |
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12 * In addition, as a special exception, the copyright holders of this |
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13 * program give permission to link the code of its release with the |
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it |
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15 * that use the same license as the "OpenSSL" library), and distribute |
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16 * the linked executables. You must obey the GNU General Public License |
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17 * in all respects for all of the code used other than "OpenSSL". If you |
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18 * modify file(s) with this exception, you may extend this exception to |
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19 * your version of the file(s), but you are not obligated to do so. If |
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20 * you do not wish to do so, delete this exception statement from your |
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21 * version. If you delete this exception statement from all source files |
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22 * in the program, then also delete it here. |
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23 * |
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24 * This program is distributed in the hope that it will be useful, but |
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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27 * General Public License for more details. |
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28 * |
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29 * You should have received a copy of the GNU General Public License |
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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31 **/ |
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32 |
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33 |
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34 #include "../PrecompiledHeaders.h" |
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35 #include "Font.h" |
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36 |
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37 #if !defined(ORTHANC_ENABLE_LOCALE) |
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38 # error ORTHANC_ENABLE_LOCALE must be defined to use this file |
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39 #endif |
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40 |
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41 #if ORTHANC_SANDBOXED == 0 |
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42 # include "../SystemToolbox.h" |
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43 #endif |
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44 |
2900 | 45 #include "../OrthancException.h" |
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46 #include "../Toolbox.h" |
2900 | 47 #include "Image.h" |
48 #include "ImageProcessing.h" | |
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49 |
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50 #include <stdio.h> |
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51 #include <memory> |
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52 #include <boost/lexical_cast.hpp> |
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53 |
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54 namespace Orthanc |
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55 { |
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56 Font::~Font() |
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57 { |
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58 for (Characters::iterator it = characters_.begin(); |
1616 | 59 it != characters_.end(); ++it) |
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60 { |
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61 delete it->second; |
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62 } |
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63 } |
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64 |
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65 |
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66 void Font::LoadFromMemory(const std::string& font) |
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67 { |
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68 Json::Value v; |
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69 Json::Reader reader; |
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70 if (!reader.parse(font, v) || |
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71 v.type() != Json::objectValue || |
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72 !v.isMember("Name") || |
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73 !v.isMember("Size") || |
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74 !v.isMember("Characters") || |
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75 v["Name"].type() != Json::stringValue || |
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76 v["Size"].type() != Json::intValue || |
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77 v["Characters"].type() != Json::objectValue) |
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78 { |
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79 throw OrthancException(ErrorCode_BadFont); |
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80 } |
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81 |
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82 name_ = v["Name"].asString(); |
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83 size_ = v["Size"].asUInt(); |
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84 maxHeight_ = 0; |
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85 |
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86 Json::Value::Members characters = v["Characters"].getMemberNames(); |
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87 |
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88 for (size_t i = 0; i < characters.size(); i++) |
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89 { |
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90 const Json::Value& info = v["Characters"][characters[i]]; |
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91 if (info.type() != Json::objectValue || |
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92 !info.isMember("Advance") || |
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93 !info.isMember("Bitmap") || |
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94 !info.isMember("Height") || |
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95 !info.isMember("Top") || |
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96 !info.isMember("Width") || |
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97 info["Advance"].type() != Json::intValue || |
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98 info["Bitmap"].type() != Json::arrayValue || |
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99 info["Height"].type() != Json::intValue || |
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100 info["Top"].type() != Json::intValue || |
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101 info["Width"].type() != Json::intValue) |
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102 { |
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103 throw OrthancException(ErrorCode_BadFont); |
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104 } |
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105 |
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106 std::unique_ptr<Character> c(new Character); |
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107 |
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108 c->advance_ = info["Advance"].asUInt(); |
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109 c->height_ = info["Height"].asUInt(); |
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110 c->top_ = info["Top"].asUInt(); |
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111 c->width_ = info["Width"].asUInt(); |
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112 c->bitmap_.resize(info["Bitmap"].size()); |
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113 |
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114 if (c->height_ > maxHeight_) |
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115 { |
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116 maxHeight_ = c->height_; |
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117 } |
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118 |
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119 for (Json::Value::ArrayIndex j = 0; j < info["Bitmap"].size(); j++) |
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120 { |
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121 if (info["Bitmap"][j].type() != Json::intValue) |
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122 { |
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123 throw OrthancException(ErrorCode_BadFont); |
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124 } |
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125 |
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126 int value = info["Bitmap"][j].asInt(); |
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127 if (value < 0 || value > 255) |
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128 { |
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129 throw OrthancException(ErrorCode_BadFont); |
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130 } |
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131 |
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132 c->bitmap_[j] = static_cast<uint8_t>(value); |
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133 } |
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134 |
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135 int index = boost::lexical_cast<int>(characters[i]); |
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136 if (index < 0 || index > 255) |
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137 { |
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138 throw OrthancException(ErrorCode_BadFont); |
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139 } |
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140 |
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141 characters_[static_cast<char>(index)] = c.release(); |
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142 } |
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143 } |
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144 |
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145 |
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146 #if ORTHANC_SANDBOXED == 0 |
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147 void Font::LoadFromFile(const std::string& path) |
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148 { |
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149 std::string font; |
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151 LoadFromMemory(font); |
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152 } |
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153 #endif |
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154 |
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155 |
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156 #if ORTHANC_HAS_EMBEDDED_RESOURCES == 1 |
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157 void Font::LoadFromResource(EmbeddedResources::FileResourceId resource) |
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158 { |
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159 std::string content; |
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160 EmbeddedResources::GetFileResource(content, resource); |
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161 LoadFromMemory(content); |
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162 } |
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163 #endif |
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164 |
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165 |
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166 static unsigned int MyMin(unsigned int a, |
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167 unsigned int b) |
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168 { |
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169 return a < b ? a : b; |
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170 } |
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171 |
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172 |
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173 void Font::DrawCharacter(ImageAccessor& target, |
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174 const Character& character, |
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175 int x, |
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176 int y, |
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177 const uint8_t color[4]) const |
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178 { |
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179 // Compute the bounds of the character |
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180 if (x >= static_cast<int>(target.GetWidth()) || |
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181 y >= static_cast<int>(target.GetHeight())) |
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182 { |
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183 // The character is out of the image |
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184 return; |
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185 } |
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186 |
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187 unsigned int left = x < 0 ? -x : 0; |
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188 unsigned int top = y < 0 ? -y : 0; |
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189 unsigned int width = MyMin(character.width_, target.GetWidth() - x); |
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190 unsigned int height = MyMin(character.height_, target.GetHeight() - y); |
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191 |
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192 unsigned int bpp = target.GetBytesPerPixel(); |
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193 |
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194 // Blit the font bitmap OVER the target image |
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195 // https://en.wikipedia.org/wiki/Alpha_compositing |
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196 |
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197 for (unsigned int cy = top; cy < height; cy++) |
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198 { |
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199 uint8_t* p = reinterpret_cast<uint8_t*>(target.GetRow(y + cy)) + (x + left) * bpp; |
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200 unsigned int pos = cy * character.width_ + left; |
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201 |
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202 switch (target.GetFormat()) |
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203 { |
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204 case PixelFormat_Grayscale8: |
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205 { |
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206 assert(bpp == 1); |
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207 for (unsigned int cx = left; cx < width; cx++, pos++, p++) |
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208 { |
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209 uint16_t alpha = character.bitmap_[pos]; |
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210 uint16_t value = alpha * static_cast<uint16_t>(color[0]) + (255 - alpha) * static_cast<uint16_t>(*p); |
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211 *p = static_cast<uint8_t>(value >> 8); |
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212 } |
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213 |
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214 break; |
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215 } |
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216 |
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217 case PixelFormat_RGB24: |
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218 { |
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219 assert(bpp == 3); |
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220 for (unsigned int cx = left; cx < width; cx++, pos++, p += 3) |
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221 { |
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222 uint16_t alpha = character.bitmap_[pos]; |
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223 for (uint8_t i = 0; i < 3; i++) |
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224 { |
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225 uint16_t value = alpha * static_cast<uint16_t>(color[i]) + (255 - alpha) * static_cast<uint16_t>(p[i]); |
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226 p[i] = static_cast<uint8_t>(value >> 8); |
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227 } |
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228 } |
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229 |
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230 break; |
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231 } |
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232 |
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233 case PixelFormat_RGBA32: |
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234 case PixelFormat_BGRA32: |
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235 { |
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236 assert(bpp == 4); |
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237 |
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238 for (unsigned int cx = left; cx < width; cx++, pos++, p += 4) |
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239 { |
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240 float alpha = static_cast<float>(character.bitmap_[pos]) / 255.0f; |
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241 float beta = (1.0f - alpha) * static_cast<float>(p[3]) / 255.0f; |
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242 float denom = 1.0f / (alpha + beta); |
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243 |
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244 for (uint8_t i = 0; i < 3; i++) |
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245 { |
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246 p[i] = static_cast<uint8_t>((alpha * static_cast<float>(color[i]) + |
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247 beta * static_cast<float>(p[i])) * denom); |
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248 } |
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249 |
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250 p[3] = static_cast<uint8_t>(255.0f * (alpha + beta)); |
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251 } |
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252 |
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253 break; |
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254 } |
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255 |
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256 default: |
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257 throw OrthancException(ErrorCode_NotImplemented); |
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258 } |
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259 } |
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260 |
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261 } |
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262 |
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263 |
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264 void Font::DrawInternal(ImageAccessor& target, |
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265 const std::string& utf8, |
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266 int x, |
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267 int y, |
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268 const uint8_t color[4]) const |
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269 { |
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270 if (target.GetFormat() != PixelFormat_Grayscale8 && |
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271 target.GetFormat() != PixelFormat_RGB24 && |
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272 target.GetFormat() != PixelFormat_RGBA32 && |
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273 target.GetFormat() != PixelFormat_BGRA32) |
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274 { |
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275 throw OrthancException(ErrorCode_NotImplemented); |
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276 } |
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277 |
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278 int a = x; |
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279 |
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280 #if ORTHANC_ENABLE_LOCALE == 1 |
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281 std::string s = Toolbox::ConvertFromUtf8(utf8, Encoding_Latin1); |
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282 #else |
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283 // If the locale support is disabled, simply drop non-ASCII |
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284 // characters from the source UTF-8 string |
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285 std::string s = Toolbox::ConvertToAscii(utf8); |
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286 #endif |
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287 |
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288 for (size_t i = 0; i < s.size(); i++) |
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289 { |
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290 if (s[i] == '\n') |
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291 { |
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292 // Go to the next line |
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293 a = x; |
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294 y += maxHeight_ + 1; |
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295 } |
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296 else |
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297 { |
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298 Characters::const_iterator c = characters_.find(s[i]); |
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299 if (c != characters_.end()) |
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300 { |
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301 DrawCharacter(target, *c->second, a, y + static_cast<int>(c->second->top_), color); |
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302 a += c->second->advance_; |
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303 } |
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304 } |
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305 } |
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306 } |
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307 |
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308 |
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309 void Font::Draw(ImageAccessor& target, |
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310 const std::string& utf8, |
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311 int x, |
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312 int y, |
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313 uint8_t grayscale) const |
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314 { |
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315 uint8_t color[4] = { grayscale, grayscale, grayscale, 255 }; |
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316 DrawInternal(target, utf8, x, y, color); |
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317 } |
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318 |
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319 |
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320 void Font::Draw(ImageAccessor& target, |
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321 const std::string& utf8, |
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322 int x, |
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323 int y, |
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324 uint8_t r, |
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325 uint8_t g, |
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326 uint8_t b) const |
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327 { |
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328 uint8_t color[4]; |
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329 |
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330 switch (target.GetFormat()) |
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331 { |
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332 case PixelFormat_BGRA32: |
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333 color[0] = b; |
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334 color[1] = g; |
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335 color[2] = r; |
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336 color[3] = 255; |
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337 break; |
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338 |
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339 default: |
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340 color[0] = r; |
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341 color[1] = g; |
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342 color[2] = b; |
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343 color[3] = 255; |
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344 break; |
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345 } |
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346 |
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347 DrawInternal(target, utf8, x, y, color); |
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348 } |
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349 |
2900 | 350 |
351 void Font::ComputeTextExtent(unsigned int& width, | |
352 unsigned int& height, | |
353 const std::string& utf8) const | |
354 { | |
355 width = 0; | |
2914 | 356 height = 0; |
2900 | 357 |
358 #if ORTHANC_ENABLE_LOCALE == 1 | |
359 std::string s = Toolbox::ConvertFromUtf8(utf8, Encoding_Latin1); | |
360 #else | |
361 // If the locale support is disabled, simply drop non-ASCII | |
362 // characters from the source UTF-8 string | |
363 std::string s = Toolbox::ConvertToAscii(utf8); | |
364 #endif | |
365 | |
366 // Compute the text extent | |
367 unsigned int x = 0; | |
2901 | 368 unsigned int y = 0; |
2900 | 369 |
370 for (size_t i = 0; i < s.size(); i++) | |
371 { | |
372 if (s[i] == '\n') | |
373 { | |
374 // Go to the next line | |
375 x = 0; | |
2901 | 376 y += (maxHeight_ + 1); |
2900 | 377 } |
378 else | |
379 { | |
380 Characters::const_iterator c = characters_.find(s[i]); | |
381 if (c != characters_.end()) | |
382 { | |
383 x += c->second->advance_; | |
384 | |
2901 | 385 unsigned int bottom = y + c->second->top_ + c->second->height_; |
386 if (bottom > height) | |
2900 | 387 { |
2901 | 388 height = bottom; |
2900 | 389 } |
390 | |
391 if (x > width) | |
392 { | |
393 width = x; | |
394 } | |
395 } | |
396 } | |
397 } | |
398 } | |
399 | |
400 | |
401 ImageAccessor* Font::Render(const std::string& utf8, | |
402 PixelFormat format, | |
403 uint8_t r, | |
404 uint8_t g, | |
405 uint8_t b) const | |
406 { | |
407 unsigned int width, height; | |
408 ComputeTextExtent(width, height, utf8); | |
409 | |
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410 std::unique_ptr<ImageAccessor> target(new Image(format, width, height, false)); |
2900 | 411 ImageProcessing::Set(*target, 0, 0, 0, 255); |
412 Draw(*target, utf8, 0, 0, r, g, b); | |
413 | |
414 return target.release(); | |
415 } | |
416 | |
417 | |
418 ImageAccessor* Font::RenderAlpha(const std::string& utf8) const | |
419 { | |
420 unsigned int width, height; | |
421 ComputeTextExtent(width, height, utf8); | |
422 | |
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423 std::unique_ptr<ImageAccessor> target(new Image(PixelFormat_Grayscale8, width, height, false)); |
2900 | 424 ImageProcessing::Set(*target, 0); |
425 Draw(*target, utf8, 0, 0, 255); | |
426 | |
427 return target.release(); | |
428 } | |
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429 } |