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annotate Core/Images/Font.cpp @ 2379:4900688827a8

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reorganization in CMake
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 28 Aug 2017 18:07:03 +0200
parents a3a65de1840f
children 5edec967055e
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
1900
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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 Osimis, 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 #include "../SystemToolbox.h"
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42 #include "../Toolbox.h"
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43 #include "../OrthancException.h"
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44
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45 #include <stdio.h>
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46 #include <memory>
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47 #include <boost/lexical_cast.hpp>
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48
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49 namespace Orthanc
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50 {
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51 Font::~Font()
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52 {
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53 for (Characters::iterator it = characters_.begin();
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54 it != characters_.end(); ++it)
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55 {
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56 delete it->second;
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57 }
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58 }
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59
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60
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61 void Font::LoadFromMemory(const std::string& font)
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62 {
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63 Json::Value v;
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64 Json::Reader reader;
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65 if (!reader.parse(font, v) ||
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66 v.type() != Json::objectValue ||
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67 !v.isMember("Name") ||
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68 !v.isMember("Size") ||
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69 !v.isMember("Characters") ||
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70 v["Name"].type() != Json::stringValue ||
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71 v["Size"].type() != Json::intValue ||
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72 v["Characters"].type() != Json::objectValue)
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73 {
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74 throw OrthancException(ErrorCode_BadFont);
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75 }
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76
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77 name_ = v["Name"].asString();
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78 size_ = v["Size"].asUInt();
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79 maxHeight_ = 0;
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80
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81 Json::Value::Members characters = v["Characters"].getMemberNames();
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82
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83 for (size_t i = 0; i < characters.size(); i++)
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84 {
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85 const Json::Value& info = v["Characters"][characters[i]];
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86 if (info.type() != Json::objectValue ||
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87 !info.isMember("Advance") ||
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88 !info.isMember("Bitmap") ||
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89 !info.isMember("Height") ||
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90 !info.isMember("Top") ||
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91 !info.isMember("Width") ||
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92 info["Advance"].type() != Json::intValue ||
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93 info["Bitmap"].type() != Json::arrayValue ||
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94 info["Height"].type() != Json::intValue ||
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95 info["Top"].type() != Json::intValue ||
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96 info["Width"].type() != Json::intValue)
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97 {
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98 throw OrthancException(ErrorCode_BadFont);
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99 }
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100
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101 std::auto_ptr<Character> c(new Character);
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102
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103 c->advance_ = info["Advance"].asUInt();
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104 c->height_ = info["Height"].asUInt();
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105 c->top_ = info["Top"].asUInt();
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106 c->width_ = info["Width"].asUInt();
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107 c->bitmap_.resize(info["Bitmap"].size());
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108
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109 if (c->height_ > maxHeight_)
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110 {
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111 maxHeight_ = c->height_;
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112 }
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113
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114 for (Json::Value::ArrayIndex j = 0; j < info["Bitmap"].size(); j++)
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115 {
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116 if (info["Bitmap"][j].type() != Json::intValue)
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117 {
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118 throw OrthancException(ErrorCode_BadFont);
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119 }
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120
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121 int value = info["Bitmap"][j].asInt();
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122 if (value < 0 || value > 255)
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123 {
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124 throw OrthancException(ErrorCode_BadFont);
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125 }
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126
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127 c->bitmap_[j] = static_cast<uint8_t>(value);
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128 }
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129
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130 int index = boost::lexical_cast<int>(characters[i]);
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131 if (index < 0 || index > 255)
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132 {
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133 throw OrthancException(ErrorCode_BadFont);
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134 }
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135
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136 characters_[static_cast<char>(index)] = c.release();
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137 }
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138 }
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139
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140
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141 void Font::LoadFromFile(const std::string& path)
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142 {
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143 std::string font;
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parents: 1900
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144 SystemToolbox::ReadFile(font, path);
1610
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145 LoadFromMemory(font);
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146 }
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147
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148
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149 static unsigned int MyMin(unsigned int a,
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150 unsigned int b)
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151 {
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152 return a < b ? a : b;
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153 }
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154
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155
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156 void Font::DrawCharacter(ImageAccessor& target,
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157 const Character& character,
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158 int x,
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159 int y,
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160 const uint8_t color[4]) const
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161 {
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162 // Compute the bounds of the character
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163 if (x >= static_cast<int>(target.GetWidth()) ||
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164 y >= static_cast<int>(target.GetHeight()))
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165 {
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166 // The character is out of the image
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167 return;
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168 }
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169
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170 unsigned int left = x < 0 ? -x : 0;
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171 unsigned int top = y < 0 ? -y : 0;
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172 unsigned int width = MyMin(character.width_, target.GetWidth() - x);
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173 unsigned int height = MyMin(character.height_, target.GetHeight() - y);
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174
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175 unsigned int bpp = target.GetBytesPerPixel();
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176
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177 // Blit the font bitmap OVER the target image
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178 // https://en.wikipedia.org/wiki/Alpha_compositing
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179
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180 for (unsigned int cy = top; cy < height; cy++)
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181 {
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182 uint8_t* p = reinterpret_cast<uint8_t*>(target.GetRow(y + cy)) + (x + left) * bpp;
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183 unsigned int pos = cy * character.width_ + left;
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184
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185 switch (target.GetFormat())
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186 {
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187 case PixelFormat_Grayscale8:
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188 {
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189 assert(bpp == 1);
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190 for (unsigned int cx = left; cx < width; cx++, pos++, p++)
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191 {
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192 uint16_t alpha = character.bitmap_[pos];
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193 uint16_t value = alpha * static_cast<uint16_t>(color[0]) + (255 - alpha) * static_cast<uint16_t>(*p);
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194 *p = static_cast<uint8_t>(value >> 8);
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195 }
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196
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197 break;
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198 }
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199
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200 case PixelFormat_RGB24:
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201 {
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202 assert(bpp == 3);
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203 for (unsigned int cx = left; cx < width; cx++, pos++, p += 3)
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204 {
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205 uint16_t alpha = character.bitmap_[pos];
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206 for (uint8_t i = 0; i < 3; i++)
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207 {
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208 uint16_t value = alpha * static_cast<uint16_t>(color[i]) + (255 - alpha) * static_cast<uint16_t>(p[i]);
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209 p[i] = static_cast<uint8_t>(value >> 8);
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diff changeset
210 }
1610
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211 }
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parents:
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212
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213 break;
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214 }
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parents:
diff changeset
215
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diff changeset
216 case PixelFormat_RGBA32:
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217 {
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diff changeset
218 assert(bpp == 4);
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219
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220 for (unsigned int cx = left; cx < width; cx++, pos++, p += 4)
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diff changeset
221 {
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diff changeset
222 float alpha = static_cast<float>(character.bitmap_[pos]) / 255.0f;
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223 float beta = (1.0f - alpha) * static_cast<float>(p[3]) / 255.0f;
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diff changeset
224 float denom = 1.0f / (alpha + beta);
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parents:
diff changeset
225
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parents:
diff changeset
226 for (uint8_t i = 0; i < 3; i++)
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parents:
diff changeset
227 {
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diff changeset
228 p[i] = static_cast<uint8_t>((alpha * static_cast<float>(color[i]) +
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
229 beta * static_cast<float>(p[i])) * denom);
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parents:
diff changeset
230 }
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
231
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
232 p[3] = static_cast<uint8_t>(255.0f * (alpha + beta));
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
233 }
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
234
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
235 break;
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parents:
diff changeset
236 }
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
237
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
238 default:
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
239 throw OrthancException(ErrorCode_NotImplemented);
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parents:
diff changeset
240 }
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parents:
diff changeset
241 }
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
242
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
243 }
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
244
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
245
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
246 void Font::DrawInternal(ImageAccessor& target,
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diff changeset
247 const std::string& utf8,
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diff changeset
248 int x,
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diff changeset
249 int y,
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diff changeset
250 const uint8_t color[4]) const
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diff changeset
251 {
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diff changeset
252 if (target.GetFormat() != PixelFormat_Grayscale8 &&
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diff changeset
253 target.GetFormat() != PixelFormat_RGB24 &&
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diff changeset
254 target.GetFormat() != PixelFormat_RGBA32)
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parents:
diff changeset
255 {
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diff changeset
256 throw OrthancException(ErrorCode_NotImplemented);
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parents:
diff changeset
257 }
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
258
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parents:
diff changeset
259 int a = x;
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
260
2379
4900688827a8 reorganization in CMake
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parents: 2244
diff changeset
261 #if ORTHANC_ENABLE_LOCALE == 1
1610
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parents:
diff changeset
262 std::string s = Toolbox::ConvertFromUtf8(utf8, Encoding_Latin1);
2379
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parents: 2244
diff changeset
263 #else
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diff changeset
264 // If the locale support is disabled, simply drop non-ASCII
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265 // characters from the source UTF-8 string
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266 std::string s = Toolbox::ConvertToAscii(utf8);
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diff changeset
267 #endif
1610
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diff changeset
268
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parents:
diff changeset
269 for (size_t i = 0; i < s.size(); i++)
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parents:
diff changeset
270 {
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diff changeset
271 if (s[i] == '\n')
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parents:
diff changeset
272 {
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diff changeset
273 // Go to the next line
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parents:
diff changeset
274 a = x;
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parents:
diff changeset
275 y += maxHeight_ + 1;
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parents:
diff changeset
276 }
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parents:
diff changeset
277 else
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parents:
diff changeset
278 {
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parents:
diff changeset
279 Characters::const_iterator c = characters_.find(s[i]);
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parents:
diff changeset
280 if (c != characters_.end())
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parents:
diff changeset
281 {
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parents:
diff changeset
282 DrawCharacter(target, *c->second, a, y + static_cast<int>(c->second->top_), color);
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diff changeset
283 a += c->second->advance_;
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parents:
diff changeset
284 }
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parents:
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285 }
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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 void Font::Draw(ImageAccessor& target,
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291 const std::string& utf8,
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292 int x,
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293 int y,
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294 uint8_t grayscale) const
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295 {
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296 uint8_t color[4] = { grayscale, grayscale, grayscale, 255 };
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297 DrawInternal(target, utf8, x, y, color);
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298 }
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299
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300
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301 void Font::Draw(ImageAccessor& target,
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302 const std::string& utf8,
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303 int x,
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304 int y,
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305 uint8_t r,
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306 uint8_t g,
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307 uint8_t b) const
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308 {
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309 uint8_t color[4] = { r, g, b, 255 };
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310 DrawInternal(target, utf8, x, y, color);
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311 }
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312
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313 }