Mercurial > hg > orthanc

annotate OrthancFramework/Sources/Images/Font.cpp @ 5406:aaf7c49a9ddc am-http-compression

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tentative to implement smart HTTP compression with detection of transfer syntax
author Alain Mazy <am@osimis.io>
date Sat, 04 Nov 2023 13:42:30 +0100
parents 0ea402b4d901
children 47334eeaaa1a
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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) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #include "../PrecompiledHeaders.h"
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25 #include "Font.h"
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26
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27 #if !defined(ORTHANC_ENABLE_LOCALE)
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28 # error ORTHANC_ENABLE_LOCALE must be defined to use this file
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29 #endif
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30
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31 #if ORTHANC_SANDBOXED == 0
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32 # include "../SystemToolbox.h"
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33 #endif
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34
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35 #include "../OrthancException.h"
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36 #include "../Toolbox.h"
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37 #include "Image.h"
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38 #include "ImageProcessing.h"
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39
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40 #include <stdio.h>
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41 #include <memory>
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42 #include <boost/lexical_cast.hpp>
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43
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44 namespace Orthanc
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45 {
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46 Font::Font() :
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47 size_(0),
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48 maxHeight_(0)
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49 {
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50 }
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51
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52
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53 Font::~Font()
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54 {
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55 for (Characters::iterator it = characters_.begin();
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56 it != characters_.end(); ++it)
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57 {
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58 delete it->second;
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59 }
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60 }
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61
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62
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63 void Font::LoadFromMemory(const std::string& font)
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64 {
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65 Json::Value v;
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66 if (!Toolbox::ReadJson(v, font) ||
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67 v.type() != Json::objectValue ||
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68 !v.isMember("Name") ||
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69 !v.isMember("Size") ||
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70 !v.isMember("Characters") ||
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71 v["Name"].type() != Json::stringValue ||
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72 v["Size"].type() != Json::intValue ||
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73 v["Characters"].type() != Json::objectValue)
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74 {
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75 throw OrthancException(ErrorCode_BadFont);
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76 }
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77
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78 name_ = v["Name"].asString();
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79 size_ = v["Size"].asUInt();
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80 maxHeight_ = 0;
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81
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82 Json::Value::Members characters = v["Characters"].getMemberNames();
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83
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84 for (size_t i = 0; i < characters.size(); i++)
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85 {
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86 const Json::Value& info = v["Characters"][characters[i]];
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87 if (info.type() != Json::objectValue ||
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88 !info.isMember("Advance") ||
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89 !info.isMember("Bitmap") ||
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90 !info.isMember("Height") ||
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91 !info.isMember("Top") ||
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92 !info.isMember("Width") ||
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93 info["Advance"].type() != Json::intValue ||
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94 info["Bitmap"].type() != Json::arrayValue ||
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95 info["Height"].type() != Json::intValue ||
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96 info["Top"].type() != Json::intValue ||
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97 info["Width"].type() != Json::intValue)
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98 {
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99 throw OrthancException(ErrorCode_BadFont);
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100 }
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101
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102 std::unique_ptr<Character> c(new Character);
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103
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104 c->advance_ = info["Advance"].asUInt();
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105 c->height_ = info["Height"].asUInt();
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106 c->top_ = info["Top"].asUInt();
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107 c->width_ = info["Width"].asUInt();
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108 c->bitmap_.resize(info["Bitmap"].size());
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109
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110 if (c->height_ > maxHeight_)
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111 {
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112 maxHeight_ = c->height_;
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113 }
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114
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115 for (Json::Value::ArrayIndex j = 0; j < info["Bitmap"].size(); j++)
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116 {
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117 if (info["Bitmap"][j].type() != Json::intValue)
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118 {
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119 throw OrthancException(ErrorCode_BadFont);
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120 }
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121
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122 int value = info["Bitmap"][j].asInt();
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123 if (value < 0 || value > 255)
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124 {
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125 throw OrthancException(ErrorCode_BadFont);
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126 }
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127
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128 c->bitmap_[j] = static_cast<uint8_t>(value);
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129 }
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130
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131 int index = boost::lexical_cast<int>(characters[i]);
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132 if (index < 0 || index > 255)
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133 {
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134 throw OrthancException(ErrorCode_BadFont);
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135 }
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136
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137 characters_[static_cast<char>(index)] = c.release();
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138 }
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139 }
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140
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141
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142 #if ORTHANC_SANDBOXED == 0
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143 void Font::LoadFromFile(const std::string& path)
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144 {
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145 std::string font;
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146 SystemToolbox::ReadFile(font, path);
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147 LoadFromMemory(font);
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148 }
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149 #endif
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150
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151 const std::string &Font::GetName() const
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152 {
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153 return name_;
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154 }
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155
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156 unsigned int Font::GetSize() const
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157 {
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158 return size_;
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159 }
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160
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161
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162 static unsigned int MyMin(unsigned int a,
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163 unsigned int b)
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164 {
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165 return a < b ? a : b;
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166 }
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167
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168
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169 void Font::DrawCharacter(ImageAccessor& target,
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170 const Character& character,
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171 int x,
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172 int y,
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173 const uint8_t color[4]) const
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174 {
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175 // Compute the bounds of the character
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176 if (x >= static_cast<int>(target.GetWidth()) ||
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177 y >= static_cast<int>(target.GetHeight()))
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178 {
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179 // The character is out of the image
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180 return;
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181 }
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182
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183 unsigned int left = x < 0 ? -x : 0;
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184 unsigned int top = y < 0 ? -y : 0;
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185 unsigned int width = MyMin(character.width_, target.GetWidth() - x);
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186 unsigned int height = MyMin(character.height_, target.GetHeight() - y);
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187
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188 unsigned int bpp = target.GetBytesPerPixel();
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189
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190 // Blit the font bitmap OVER the target image
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191 // https://en.wikipedia.org/wiki/Alpha_compositing
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192
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193 for (unsigned int cy = top; cy < height; cy++)
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194 {
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195 uint8_t* p = reinterpret_cast<uint8_t*>(target.GetRow(y + cy)) + (x + left) * bpp;
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196 unsigned int pos = cy * character.width_ + left;
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197
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198 switch (target.GetFormat())
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199 {
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200 case PixelFormat_Grayscale8:
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201 {
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202 assert(bpp == 1);
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203 for (unsigned int cx = left; cx < width; cx++, pos++, p++)
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204 {
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205 uint16_t alpha = character.bitmap_[pos];
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206 uint16_t value = alpha * static_cast<uint16_t>(color[0]) + (255 - alpha) * static_cast<uint16_t>(*p);
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207 *p = static_cast<uint8_t>(value >> 8);
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208 }
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209
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210 break;
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211 }
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212
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213 case PixelFormat_RGB24:
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214 {
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215 assert(bpp == 3);
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216 for (unsigned int cx = left; cx < width; cx++, pos++, p += 3)
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217 {
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218 uint16_t alpha = character.bitmap_[pos];
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219 for (uint8_t i = 0; i < 3; i++)
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220 {
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221 uint16_t value = alpha * static_cast<uint16_t>(color[i]) + (255 - alpha) * static_cast<uint16_t>(p[i]);
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222 p[i] = static_cast<uint8_t>(value >> 8);
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223 }
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224 }
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225
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226 break;
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227 }
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228
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229 case PixelFormat_RGBA32:
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230 case PixelFormat_BGRA32:
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231 {
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232 assert(bpp == 4);
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233
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234 for (unsigned int cx = left; cx < width; cx++, pos++, p += 4)
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235 {
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236 float alpha = static_cast<float>(character.bitmap_[pos]) / 255.0f;
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237 float beta = (1.0f - alpha) * static_cast<float>(p[3]) / 255.0f;
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238 float denom = 1.0f / (alpha + beta);
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239
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240 for (uint8_t i = 0; i < 3; i++)
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241 {
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242 p[i] = static_cast<uint8_t>((alpha * static_cast<float>(color[i]) +
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243 beta * static_cast<float>(p[i])) * denom);
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244 }
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245
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246 p[3] = static_cast<uint8_t>(255.0f * (alpha + beta));
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247 }
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248
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249 break;
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250 }
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251
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252 default:
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253 throw OrthancException(ErrorCode_NotImplemented);
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254 }
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255 }
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256
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257 }
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258
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259
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260 void Font::DrawInternal(ImageAccessor& target,
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261 const std::string& utf8,
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262 int x,
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diff changeset
263 int y,
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264 const uint8_t color[4]) const
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265 {
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266 if (target.GetFormat() != PixelFormat_Grayscale8 &&
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267 target.GetFormat() != PixelFormat_RGB24 &&
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268 target.GetFormat() != PixelFormat_RGBA32 &&
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diff changeset
269 target.GetFormat() != PixelFormat_BGRA32)
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270 {
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271 throw OrthancException(ErrorCode_NotImplemented);
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272 }
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273
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274 int a = x;
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275
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276 #if ORTHANC_ENABLE_LOCALE == 1
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277 std::string s = Toolbox::ConvertFromUtf8(utf8, Encoding_Latin1);
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278 #else
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279 // If the locale support is disabled, simply drop non-ASCII
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280 // characters from the source UTF-8 string
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281 std::string s = Toolbox::ConvertToAscii(utf8);
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282 #endif
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283
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284 for (size_t i = 0; i < s.size(); i++)
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285 {
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286 if (s[i] == '\n')
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287 {
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288 // Go to the next line
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289 a = x;
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290 y += maxHeight_ + 1;
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291 }
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292 else
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293 {
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294 Characters::const_iterator c = characters_.find(s[i]);
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295 if (c != characters_.end())
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296 {
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297 DrawCharacter(target, *c->second, a, y + static_cast<int>(c->second->top_), color);
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298 a += c->second->advance_;
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299 }
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300 }
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301 }
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302 }
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303
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304
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305 void Font::Draw(ImageAccessor& target,
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306 const std::string& utf8,
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307 int x,
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308 int y,
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309 uint8_t grayscale) const
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310 {
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311 uint8_t color[4] = { grayscale, grayscale, grayscale, 255 };
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312 DrawInternal(target, utf8, x, y, color);
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313 }
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314
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315
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316 void Font::Draw(ImageAccessor& target,
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317 const std::string& utf8,
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318 int x,
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319 int y,
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320 uint8_t r,
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321 uint8_t g,
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322 uint8_t b) const
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323 {
2853
52b017d22a4f New URI: "/studies/.../merge" to merge a study
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324 uint8_t color[4];
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325
52b017d22a4f New URI: "/studies/.../merge" to merge a study
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diff changeset
326 switch (target.GetFormat())
52b017d22a4f New URI: "/studies/.../merge" to merge a study
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327 {
52b017d22a4f New URI: "/studies/.../merge" to merge a study
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328 case PixelFormat_BGRA32:
52b017d22a4f New URI: "/studies/.../merge" to merge a study
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329 color[0] = b;
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330 color[1] = g;
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331 color[2] = r;
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332 color[3] = 255;
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diff changeset
333 break;
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
334
52b017d22a4f New URI: "/studies/.../merge" to merge a study
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
335 default:
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Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
336 color[0] = r;
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337 color[1] = g;
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diff changeset
338 color[2] = b;
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339 color[3] = 255;
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diff changeset
340 break;
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diff changeset
341 }
52b017d22a4f New URI: "/studies/.../merge" to merge a study
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diff changeset
342
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343 DrawInternal(target, utf8, x, y, color);
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344 }
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345
2900
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346
668d5ad73c74 Font::Render()
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347 void Font::ComputeTextExtent(unsigned int& width,
668d5ad73c74 Font::Render()
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348 unsigned int& height,
668d5ad73c74 Font::Render()
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349 const std::string& utf8) const
668d5ad73c74 Font::Render()
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350 {
668d5ad73c74 Font::Render()
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351 width = 0;
2914
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352 height = 0;
2900
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353
668d5ad73c74 Font::Render()
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diff changeset
354 #if ORTHANC_ENABLE_LOCALE == 1
668d5ad73c74 Font::Render()
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diff changeset
355 std::string s = Toolbox::ConvertFromUtf8(utf8, Encoding_Latin1);
668d5ad73c74 Font::Render()
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356 #else
668d5ad73c74 Font::Render()
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diff changeset
357 // If the locale support is disabled, simply drop non-ASCII
668d5ad73c74 Font::Render()
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diff changeset
358 // characters from the source UTF-8 string
668d5ad73c74 Font::Render()
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diff changeset
359 std::string s = Toolbox::ConvertToAscii(utf8);
668d5ad73c74 Font::Render()
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diff changeset
360 #endif
668d5ad73c74 Font::Render()
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diff changeset
361
668d5ad73c74 Font::Render()
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diff changeset
362 // Compute the text extent
668d5ad73c74 Font::Render()
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diff changeset
363 unsigned int x = 0;
2901
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diff changeset
364 unsigned int y = 0;
2900
668d5ad73c74 Font::Render()
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diff changeset
365
668d5ad73c74 Font::Render()
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diff changeset
366 for (size_t i = 0; i < s.size(); i++)
668d5ad73c74 Font::Render()
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diff changeset
367 {
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
368 if (s[i] == '\n')
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
369 {
668d5ad73c74 Font::Render()
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diff changeset
370 // Go to the next line
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
371 x = 0;
2901
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diff changeset
372 y += (maxHeight_ + 1);
2900
668d5ad73c74 Font::Render()
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diff changeset
373 }
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
374 else
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
375 {
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
376 Characters::const_iterator c = characters_.find(s[i]);
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
377 if (c != characters_.end())
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
378 {
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
379 x += c->second->advance_;
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
380
2901
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diff changeset
381 unsigned int bottom = y + c->second->top_ + c->second->height_;
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2900
diff changeset
382 if (bottom > height)
2900
668d5ad73c74 Font::Render()
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diff changeset
383 {
2901
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diff changeset
384 height = bottom;
2900
668d5ad73c74 Font::Render()
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diff changeset
385 }
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
386
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
387 if (x > width)
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
388 {
668d5ad73c74 Font::Render()
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diff changeset
389 width = x;
668d5ad73c74 Font::Render()
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diff changeset
390 }
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
391 }
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
392 }
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
393 }
668d5ad73c74 Font::Render()
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parents: 2853
diff changeset
394 }
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
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
397 ImageAccessor* Font::Render(const std::string& utf8,
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
398 PixelFormat format,
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
399 uint8_t r,
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
400 uint8_t g,
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
401 uint8_t b) const
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 unsigned int width, height;
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
404 ComputeTextExtent(width, height, utf8);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
405
3712
2a170a8f1faf replacing std::auto_ptr by std::unique_ptr
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 3640
diff changeset
406 std::unique_ptr<ImageAccessor> target(new Image(format, width, height, false));
2900
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
407 ImageProcessing::Set(*target, 0, 0, 0, 255);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
408 Draw(*target, utf8, 0, 0, r, g, b);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
409
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
410 return target.release();
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
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
413
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
414 ImageAccessor* Font::RenderAlpha(const std::string& utf8) const
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 unsigned int width, height;
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
417 ComputeTextExtent(width, height, utf8);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
418
3712
2a170a8f1faf replacing std::auto_ptr by std::unique_ptr
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 3640
diff changeset
419 std::unique_ptr<ImageAccessor> target(new Image(PixelFormat_Grayscale8, width, height, false));
2900
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
420 ImageProcessing::Set(*target, 0);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
421 Draw(*target, utf8, 0, 0, 255);
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
422
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
423 return target.release();
668d5ad73c74 Font::Render()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 2853
diff changeset
424 }
1610
2dff2bdffdb8 font support within Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
425 }