Mercurial > hg > orthanc-stone

annotate OrthancStone/Sources/Oracle/GetOrthancImageCommand.cpp @ 1739:9ac2a65d4172

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 06 Jan 2021 17:50:00 +0100
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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) 2017-2021 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 Lesser 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 * Lesser 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 Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #include "GetOrthancImageCommand.h"
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24
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25 #include <Images/JpegReader.h>
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26 #include <Images/PamReader.h>
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27 #include <Images/PngReader.h>
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28 #include <OrthancException.h>
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29 #include <Toolbox.h>
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30
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31 namespace OrthancStone
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32 {
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33 GetOrthancImageCommand::GetOrthancImageCommand() :
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34 uri_("/"),
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35 timeout_(600),
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36 hasExpectedFormat_(false),
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37 expectedFormat_(Orthanc::PixelFormat_Grayscale8)
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38 {
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39 }
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40
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41
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42 void GetOrthancImageCommand::SetExpectedPixelFormat(Orthanc::PixelFormat format)
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43 {
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44 hasExpectedFormat_ = true;
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45 expectedFormat_ = format;
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46 }
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47
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48
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49 static std::string GetFormatSuffix(Orthanc::PixelFormat pixelFormat)
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50 {
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51 switch (pixelFormat)
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52 {
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53 case Orthanc::PixelFormat_RGB24:
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54 return "preview";
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56 case Orthanc::PixelFormat_Grayscale16:
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57 return "image-uint16";
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58
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59 case Orthanc::PixelFormat_SignedGrayscale16:
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60 return "image-int16";
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61
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62 default:
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63 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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64 }
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65 }
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66
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67
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68 void GetOrthancImageCommand::SetInstanceUri(const std::string& instance,
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69 Orthanc::PixelFormat pixelFormat)
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70 {
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71 uri_ = "/instances/" + instance + "/" + GetFormatSuffix(pixelFormat);
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72 }
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73
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74
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75 void GetOrthancImageCommand::SetFrameUri(const std::string& instance,
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76 unsigned int frame,
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77 Orthanc::PixelFormat pixelFormat)
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78 {
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79 uri_ = ("/instances/" + instance + "/frames/" +
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80 boost::lexical_cast<std::string>(frame) + "/" + GetFormatSuffix(pixelFormat));
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81 }
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82
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83
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84 void GetOrthancImageCommand::ProcessHttpAnswer(boost::weak_ptr<IObserver> receiver,
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85 IMessageEmitter& emitter,
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86 const std::string& answer,
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87 const HttpHeaders& answerHeaders) const
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88 {
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89 for (HttpHeaders::const_iterator it = answerHeaders.begin(); it != answerHeaders.end(); ++it)
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90 {
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91 std::string key = Orthanc::Toolbox::StripSpaces(it->first);
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92 Orthanc::Toolbox::ToLowerCase(key);
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93
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94 if (key == "content-disposition" &&
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95 it->second == "filename=\"unsupported.png\"")
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96 {
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97 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat,
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98 "Orthanc cannot decode this image");
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99 }
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100 }
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101
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102 Orthanc::MimeType contentType = Orthanc::MimeType_Binary;
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103
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104 for (HttpHeaders::const_iterator it = answerHeaders.begin();
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105 it != answerHeaders.end(); ++it)
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106 {
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107 std::string s;
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108 Orthanc::Toolbox::ToLowerCase(s, it->first);
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109
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110 if (s == "content-type")
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111 {
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112 contentType = Orthanc::StringToMimeType(it->second);
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113 break;
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114 }
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115 }
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116
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117 std::unique_ptr<Orthanc::ImageAccessor> image;
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118
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119 switch (contentType)
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120 {
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121 case Orthanc::MimeType_Png:
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122 {
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123 image.reset(new Orthanc::PngReader);
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124 dynamic_cast<Orthanc::PngReader&>(*image).ReadFromMemory(answer);
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125 break;
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126 }
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127
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128 case Orthanc::MimeType_Pam:
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129 {
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130 #ifdef __EMSCRIPTEN__
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131 // "true" means we ask the PamReader to make an extra copy so that
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132 // the resulting Orthanc::ImageAccessor is aligned (as malloc is).
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133 // Indeed, even though alignment is not required in Web Assembly,
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134 // Emscripten seems to check it and bail out if addresses are "odd"
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135 image.reset(new Orthanc::PamReader(true));
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136 #else
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137 // potentially unaligned, with is faster and consumes less heap memory
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138 image.reset(new Orthanc::PamReader(false));
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139 #endif
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140 dynamic_cast<Orthanc::PamReader&>(*image).ReadFromMemory(answer);
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141 break;
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142 }
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143
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144 case Orthanc::MimeType_Jpeg:
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145 {
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146 image.reset(new Orthanc::JpegReader);
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147 dynamic_cast<Orthanc::JpegReader&>(*image).ReadFromMemory(answer);
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148 break;
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149 }
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150
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151 default:
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152 throw Orthanc::OrthancException(Orthanc::ErrorCode_NetworkProtocol,
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153 "Unsupported HTTP Content-Type for an image: " +
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154 std::string(Orthanc::EnumerationToString(contentType)));
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155 }
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156
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157 if (hasExpectedFormat_)
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158 {
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159 if (expectedFormat_ == Orthanc::PixelFormat_SignedGrayscale16 &&
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160 image->GetFormat() == Orthanc::PixelFormat_Grayscale16)
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161 {
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162 image->SetFormat(Orthanc::PixelFormat_SignedGrayscale16);
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163 }
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164
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165 if (expectedFormat_ != image->GetFormat())
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166 {
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167 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
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168 }
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169 }
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170
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171 //{
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172 // // DEBUG DISPLAY IMAGE PROPERTIES BGO 2020-04-11
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173 // const Orthanc::ImageAccessor& source = *image;
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174 // const void* sourceBuffer = source.GetConstBuffer();
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175 // intptr_t sourceBufferInt = reinterpret_cast<intptr_t>(sourceBuffer);
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176 // int sourceWidth = source.GetWidth();
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177 // int sourceHeight = source.GetHeight();
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178 // int sourcePitch = source.GetPitch();
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179
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180 // // TODO: turn error into trace below
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181 // LOG(ERROR) << "GetOrthancImageCommand::ProcessHttpAnswer | source:"
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182 // << " W = " << sourceWidth << " H = " << sourceHeight
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183 // << " P = " << sourcePitch << " B = " << sourceBufferInt
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184 // << " B % 4 == " << sourceBufferInt % 4;
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185 //}
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186
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187
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188 SuccessMessage message(*this, *image, contentType);
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189 emitter.EmitMessage(receiver, message);
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190 }
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191 }