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annotate Core/Images/Font.cpp @ 2902:e80b38fb22c6

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fix ImageProcessing::Set() for subregions
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 23 Oct 2018 12:05:19 +0200
parents 93c65e3a6bb1
children 058851941abe
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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) 2017-2018 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
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45 #include "../OrthancException.h"
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46 #include "../Toolbox.h"
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47 #include "Image.h"
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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();
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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::auto_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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150 SystemToolbox::ReadFile(font, path);
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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 static unsigned int MyMin(unsigned int a,
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157 unsigned int b)
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158 {
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159 return a < b ? a : b;
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160 }
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161
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162
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163 void Font::DrawCharacter(ImageAccessor& target,
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164 const Character& character,
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165 int x,
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166 int y,
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167 const uint8_t color[4]) const
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168 {
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169 // Compute the bounds of the character
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170 if (x >= static_cast<int>(target.GetWidth()) ||
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171 y >= static_cast<int>(target.GetHeight()))
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172 {
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173 // The character is out of the image
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174 return;
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175 }
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176
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177 unsigned int left = x < 0 ? -x : 0;
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178 unsigned int top = y < 0 ? -y : 0;
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179 unsigned int width = MyMin(character.width_, target.GetWidth() - x);
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180 unsigned int height = MyMin(character.height_, target.GetHeight() - y);
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181
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182 unsigned int bpp = target.GetBytesPerPixel();
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183
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184 // Blit the font bitmap OVER the target image
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185 // https://en.wikipedia.org/wiki/Alpha_compositing
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186
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187 for (unsigned int cy = top; cy < height; cy++)
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188 {
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189 uint8_t* p = reinterpret_cast<uint8_t*>(target.GetRow(y + cy)) + (x + left) * bpp;
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190 unsigned int pos = cy * character.width_ + left;
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191
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192 switch (target.GetFormat())
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193 {
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194 case PixelFormat_Grayscale8:
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195 {
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196 assert(bpp == 1);
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197 for (unsigned int cx = left; cx < width; cx++, pos++, p++)
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198 {
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199 uint16_t alpha = character.bitmap_[pos];
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200 uint16_t value = alpha * static_cast<uint16_t>(color[0]) + (255 - alpha) * static_cast<uint16_t>(*p);
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201 *p = static_cast<uint8_t>(value >> 8);
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202 }
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203
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204 break;
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205 }
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206
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207 case PixelFormat_RGB24:
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208 {
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209 assert(bpp == 3);
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210 for (unsigned int cx = left; cx < width; cx++, pos++, p += 3)
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211 {
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212 uint16_t alpha = character.bitmap_[pos];
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diff changeset
213 for (uint8_t i = 0; i < 3; i++)
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214 {
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215 uint16_t value = alpha * static_cast<uint16_t>(color[i]) + (255 - alpha) * static_cast<uint16_t>(p[i]);
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216 p[i] = static_cast<uint8_t>(value >> 8);
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diff changeset
217 }
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218 }
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219
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220 break;
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221 }
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222
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diff changeset
223 case PixelFormat_RGBA32:
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diff changeset
224 case PixelFormat_BGRA32:
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diff changeset
225 {
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diff changeset
226 assert(bpp == 4);
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227
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228 for (unsigned int cx = left; cx < width; cx++, pos++, p += 4)
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diff changeset
229 {
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diff changeset
230 float alpha = static_cast<float>(character.bitmap_[pos]) / 255.0f;
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diff changeset
231 float beta = (1.0f - alpha) * static_cast<float>(p[3]) / 255.0f;
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diff changeset
232 float denom = 1.0f / (alpha + beta);
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diff changeset
233
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diff changeset
234 for (uint8_t i = 0; i < 3; i++)
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parents:
diff changeset
235 {
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diff changeset
236 p[i] = static_cast<uint8_t>((alpha * static_cast<float>(color[i]) +
2dff2bdffdb8 font support within Orthanc
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diff changeset
237 beta * static_cast<float>(p[i])) * denom);
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diff changeset
238 }
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diff changeset
239
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diff changeset
240 p[3] = static_cast<uint8_t>(255.0f * (alpha + beta));
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parents:
diff changeset
241 }
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parents:
diff changeset
242
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
243 break;
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parents:
diff changeset
244 }
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parents:
diff changeset
245
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parents:
diff changeset
246 default:
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diff changeset
247 throw OrthancException(ErrorCode_NotImplemented);
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parents:
diff changeset
248 }
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parents:
diff changeset
249 }
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parents:
diff changeset
250
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
251 }
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parents:
diff changeset
252
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
253
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diff changeset
254 void Font::DrawInternal(ImageAccessor& target,
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diff changeset
255 const std::string& utf8,
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diff changeset
256 int x,
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diff changeset
257 int y,
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diff changeset
258 const uint8_t color[4]) const
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diff changeset
259 {
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parents:
diff changeset
260 if (target.GetFormat() != PixelFormat_Grayscale8 &&
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parents:
diff changeset
261 target.GetFormat() != PixelFormat_RGB24 &&
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diff changeset
262 target.GetFormat() != PixelFormat_RGBA32 &&
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parents: 2447
diff changeset
263 target.GetFormat() != PixelFormat_BGRA32)
1610
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parents:
diff changeset
264 {
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diff changeset
265 throw OrthancException(ErrorCode_NotImplemented);
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parents:
diff changeset
266 }
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parents:
diff changeset
267
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diff changeset
268 int a = x;
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diff changeset
269
2379
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diff changeset
270 #if ORTHANC_ENABLE_LOCALE == 1
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271 std::string s = Toolbox::ConvertFromUtf8(utf8, Encoding_Latin1);
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diff changeset
272 #else
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273 // If the locale support is disabled, simply drop non-ASCII
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274 // characters from the source UTF-8 string
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275 std::string s = Toolbox::ConvertToAscii(utf8);
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diff changeset
276 #endif
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diff changeset
277
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diff changeset
278 for (size_t i = 0; i < s.size(); i++)
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parents:
diff changeset
279 {
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diff changeset
280 if (s[i] == '\n')
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parents:
diff changeset
281 {
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parents:
diff changeset
282 // Go to the next line
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parents:
diff changeset
283 a = x;
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diff changeset
284 y += maxHeight_ + 1;
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diff changeset
285 }
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
286 else
2dff2bdffdb8 font support within Orthanc
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diff changeset
287 {
2dff2bdffdb8 font support within Orthanc
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diff changeset
288 Characters::const_iterator c = characters_.find(s[i]);
2dff2bdffdb8 font support within Orthanc
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diff changeset
289 if (c != characters_.end())
2dff2bdffdb8 font support within Orthanc
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diff changeset
290 {
2dff2bdffdb8 font support within Orthanc
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diff changeset
291 DrawCharacter(target, *c->second, a, y + static_cast<int>(c->second->top_), color);
2dff2bdffdb8 font support within Orthanc
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diff changeset
292 a += c->second->advance_;
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
293 }
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
294 }
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parents:
diff changeset
295 }
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parents:
diff changeset
296 }
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parents:
diff changeset
297
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parents:
diff changeset
298
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299 void Font::Draw(ImageAccessor& target,
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300 const std::string& utf8,
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301 int x,
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302 int y,
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303 uint8_t grayscale) const
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304 {
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305 uint8_t color[4] = { grayscale, grayscale, grayscale, 255 };
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306 DrawInternal(target, utf8, x, y, color);
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307 }
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diff changeset
308
2dff2bdffdb8 font support within Orthanc
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309
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diff changeset
310 void Font::Draw(ImageAccessor& target,
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311 const std::string& utf8,
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diff changeset
312 int x,
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diff changeset
313 int y,
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314 uint8_t r,
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315 uint8_t g,
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316 uint8_t b) const
1610
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diff changeset
317 {
2853
52b017d22a4f New URI: "/studies/.../merge" to merge a study
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diff changeset
318 uint8_t color[4];
52b017d22a4f New URI: "/studies/.../merge" to merge a study
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319
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
320 switch (target.GetFormat())
52b017d22a4f New URI: "/studies/.../merge" to merge a study
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321 {
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
322 case PixelFormat_BGRA32:
52b017d22a4f New URI: "/studies/.../merge" to merge a study
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323 color[0] = b;
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Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
324 color[1] = g;
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
325 color[2] = r;
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
326 color[3] = 255;
52b017d22a4f New URI: "/studies/.../merge" to merge a study
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diff changeset
327 break;
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2447
diff changeset
328
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2447
diff changeset
329 default:
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
330 color[0] = r;
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
331 color[1] = g;
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2447
diff changeset
332 color[2] = b;
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
333 color[3] = 255;
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2447
diff changeset
334 break;
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2447
diff changeset
335 }
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2447
diff changeset
336
1610
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diff changeset
337 DrawInternal(target, utf8, x, y, color);
2dff2bdffdb8 font support within Orthanc
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parents:
diff changeset
338 }
2dff2bdffdb8 font support within Orthanc
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diff changeset
339
2900
668d5ad73c74 Font::Render()
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diff changeset
340
668d5ad73c74 Font::Render()
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diff changeset
341 void Font::ComputeTextExtent(unsigned int& width,
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
342 unsigned int& height,
668d5ad73c74 Font::Render()
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diff changeset
343 const std::string& utf8) const
668d5ad73c74 Font::Render()
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344 {
668d5ad73c74 Font::Render()
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345 width = 0;
668d5ad73c74 Font::Render()
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346
668d5ad73c74 Font::Render()
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diff changeset
347 #if ORTHANC_ENABLE_LOCALE == 1
668d5ad73c74 Font::Render()
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diff changeset
348 std::string s = Toolbox::ConvertFromUtf8(utf8, Encoding_Latin1);
668d5ad73c74 Font::Render()
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349 #else
668d5ad73c74 Font::Render()
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diff changeset
350 // If the locale support is disabled, simply drop non-ASCII
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
351 // characters from the source UTF-8 string
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
352 std::string s = Toolbox::ConvertToAscii(utf8);
668d5ad73c74 Font::Render()
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diff changeset
353 #endif
668d5ad73c74 Font::Render()
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diff changeset
354
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
355 // Compute the text extent
668d5ad73c74 Font::Render()
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diff changeset
356 unsigned int x = 0;
2901
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2900
diff changeset
357 unsigned int y = 0;
2900
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
358
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
359 for (size_t i = 0; i < s.size(); i++)
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
360 {
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
361 if (s[i] == '\n')
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
362 {
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
363 // Go to the next line
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
364 x = 0;
2901
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2900
diff changeset
365 y += (maxHeight_ + 1);
2900
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
366 }
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
367 else
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
368 {
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
369 Characters::const_iterator c = characters_.find(s[i]);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
370 if (c != characters_.end())
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
371 {
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
372 x += c->second->advance_;
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
373
2901
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2900
diff changeset
374 unsigned int bottom = y + c->second->top_ + c->second->height_;
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2900
diff changeset
375 if (bottom > height)
2900
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
376 {
2901
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parents: 2900
diff changeset
377 height = bottom;
2900
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
378 }
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
379
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
380 if (x > width)
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
381 {
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
382 width = x;
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
383 }
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
384 }
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
385 }
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
386 }
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
387 }
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
388
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
389
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
390 ImageAccessor* Font::Render(const std::string& utf8,
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
391 PixelFormat format,
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
392 uint8_t r,
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
393 uint8_t g,
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
394 uint8_t b) const
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
395 {
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
396 unsigned int width, height;
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
397 ComputeTextExtent(width, height, utf8);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
398
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
399 std::auto_ptr<ImageAccessor> target(new Image(format, width, height, false));
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
400 ImageProcessing::Set(*target, 0, 0, 0, 255);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
401 Draw(*target, utf8, 0, 0, r, g, b);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
402
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
403 return target.release();
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
404 }
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
405
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
406
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
407 ImageAccessor* Font::RenderAlpha(const std::string& utf8) const
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
408 {
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
409 unsigned int width, height;
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
410 ComputeTextExtent(width, height, utf8);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
411
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
412 std::auto_ptr<ImageAccessor> target(new Image(PixelFormat_Grayscale8, width, height, false));
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
413 ImageProcessing::Set(*target, 0);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
414 Draw(*target, utf8, 0, 0, 255);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
415
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
416 return target.release();
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
417 }
1610
2dff2bdffdb8 font support within Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
418 }