annotate OrthancStone/Sources/Oracle/GetOrthancWebViewerJpegCommand.cpp @ 1571:85e117739eca

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 21 Sep 2020 17:46:39 +0200
parents 244ad1e4e76a
children 4fb8fdf03314
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1 /**
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2 * Stone of Orthanc
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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) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #include "GetOrthancWebViewerJpegCommand.h"
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23
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24 #include "../Toolbox/LinearAlgebra.h"
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25
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26 #include <Images/Image.h>
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27 #include <Images/ImageProcessing.h>
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28 #include <Images/JpegReader.h>
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29 #include <OrthancException.h>
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30 #include <Toolbox.h>
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31
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32 #ifdef _MSC_VER
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33 // 'Json::Reader': Use CharReader and CharReaderBuilder instead
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34 #pragma warning(disable:4996)
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35 #endif
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36
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37 #include <json/reader.h>
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38 #include <json/value.h>
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39
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40 namespace OrthancStone
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41 {
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42 GetOrthancWebViewerJpegCommand::GetOrthancWebViewerJpegCommand() :
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43 frame_(0),
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44 quality_(95),
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45 timeout_(600),
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46 expectedFormat_(Orthanc::PixelFormat_Grayscale8)
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47 {
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48 }
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49
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50
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51 void GetOrthancWebViewerJpegCommand::SetQuality(unsigned int quality)
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52 {
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53 if (quality == 0 ||
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54 quality > 100)
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55 {
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56 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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57 }
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58 else
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59 {
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60 quality_ = quality;
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61 }
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62 }
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63
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64
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65 std::string GetOrthancWebViewerJpegCommand::GetUri() const
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66 {
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67 return ("/web-viewer/instances/jpeg" + boost::lexical_cast<std::string>(quality_) +
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68 "-" + instanceId_ + "_" + boost::lexical_cast<std::string>(frame_));
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69 }
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70
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71
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72 void GetOrthancWebViewerJpegCommand::ProcessHttpAnswer(boost::weak_ptr<IObserver> receiver,
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73 IMessageEmitter& emitter,
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74 const std::string& answer) const
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75 {
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76 // This code comes from older "OrthancSlicesLoader::ParseSliceImageJpeg()"
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77
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78 Json::Value encoded;
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79
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80 {
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81 Json::Reader reader;
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82 if (!reader.parse(answer, encoded))
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83 {
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84 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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85 }
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86 }
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87
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88 if (encoded.type() != Json::objectValue ||
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89 !encoded.isMember("Orthanc") ||
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90 encoded["Orthanc"].type() != Json::objectValue)
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91 {
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92 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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93 }
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94
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95 const Json::Value& info = encoded["Orthanc"];
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96 if (!info.isMember("PixelData") ||
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97 !info.isMember("Stretched") ||
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98 !info.isMember("Compression") ||
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99 info["Compression"].type() != Json::stringValue ||
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100 info["PixelData"].type() != Json::stringValue ||
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101 info["Stretched"].type() != Json::booleanValue ||
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102 info["Compression"].asString() != "Jpeg")
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103 {
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104 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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105 }
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106
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107 bool isSigned = false;
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108 bool isStretched = info["Stretched"].asBool();
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109
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110 if (info.isMember("IsSigned"))
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111 {
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112 if (info["IsSigned"].type() != Json::booleanValue)
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113 {
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114 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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115 }
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116 else
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117 {
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118 isSigned = info["IsSigned"].asBool();
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119 }
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120 }
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121
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122 std::unique_ptr<Orthanc::ImageAccessor> reader;
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123
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124 {
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125 std::string jpeg;
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126 Orthanc::Toolbox::DecodeBase64(jpeg, info["PixelData"].asString());
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127
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128 reader.reset(new Orthanc::JpegReader);
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129 dynamic_cast<Orthanc::JpegReader&>(*reader).ReadFromMemory(jpeg);
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130 }
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131
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132 if (reader->GetFormat() == Orthanc::PixelFormat_RGB24) // This is a color image
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133 {
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134 if (expectedFormat_ != Orthanc::PixelFormat_RGB24)
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135 {
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136 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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137 }
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138
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139 if (isSigned || isStretched)
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140 {
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141 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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142 }
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143 else
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144 {
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145 SuccessMessage message(*this, *reader);
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146 emitter.EmitMessage(receiver, message);
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147 return;
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148 }
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149 }
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150
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151 if (reader->GetFormat() != Orthanc::PixelFormat_Grayscale8)
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152 {
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153 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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154 }
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155
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156 if (!isStretched)
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157 {
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158 if (expectedFormat_ != reader->GetFormat())
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159 {
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160 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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161 }
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162 else
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163 {
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164 SuccessMessage message(*this, *reader);
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165 emitter.EmitMessage(receiver, message);
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166 return;
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167 }
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168 }
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169
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170 int32_t stretchLow = 0;
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171 int32_t stretchHigh = 0;
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172
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173 if (!info.isMember("StretchLow") ||
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174 !info.isMember("StretchHigh") ||
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175 info["StretchLow"].type() != Json::intValue ||
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176 info["StretchHigh"].type() != Json::intValue)
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177 {
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178 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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179 }
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180
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181 stretchLow = info["StretchLow"].asInt();
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182 stretchHigh = info["StretchHigh"].asInt();
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183
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184 if (stretchLow < -32768 ||
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185 stretchHigh > 65535 ||
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186 (stretchLow < 0 && stretchHigh > 32767))
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187 {
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188 // This range cannot be represented with a uint16_t or an int16_t
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189 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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190 }
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191
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192 // Decode a grayscale JPEG 8bpp image coming from the Web viewer
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193 std::unique_ptr<Orthanc::ImageAccessor> image
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194 (new Orthanc::Image(expectedFormat_, reader->GetWidth(), reader->GetHeight(), false));
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195
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196 Orthanc::ImageProcessing::Convert(*image, *reader);
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197 reader.reset();
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198
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199 float scaling = static_cast<float>(stretchHigh - stretchLow) / 255.0f;
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200
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201 if (!LinearAlgebra::IsCloseToZero(scaling))
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202 {
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203 float offset = static_cast<float>(stretchLow) / scaling;
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204 Orthanc::ImageProcessing::ShiftScale(*image, offset, scaling, true);
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205 }
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206
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207 SuccessMessage message(*this, *image);
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208 emitter.EmitMessage(receiver, message);
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209 }
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210 }