Mercurial > hg > orthanc-stone

comparison Framework/Oracle/GetOrthancWebViewerJpegCommand.cpp @ 746:d716bfb3e07c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
reorganization
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 22 May 2019 12:48:57 +0200
parents
children 17423d072a95
comparison
equal deleted inserted replaced
745:c44c1d2d3598 746:d716bfb3e07c
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU Affero General Public License
9 * as published by the Free Software Foundation, either version 3 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Affero General Public License for more details.
16 *
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 **/
20
21
22 #include "GetOrthancWebViewerJpegCommand.h"
23
24 #include "../Toolbox/LinearAlgebra.h"
25
26 #include <Core/Images/Image.h>
27 #include <Core/Images/ImageProcessing.h>
28 #include <Core/Images/JpegReader.h>
29 #include <Core/OrthancException.h>
30 #include <Core/Toolbox.h>
31
32 #include <json/reader.h>
33 #include <json/value.h>
34
35 namespace OrthancStone
36 {
37 GetOrthancWebViewerJpegCommand::SuccessMessage::SuccessMessage(const GetOrthancWebViewerJpegCommand& command,
38 Orthanc::ImageAccessor* image) : // Takes ownership
39 OriginMessage(command),
40 image_(image)
41 {
42 if (image == NULL)
43 {
44 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
45 }
46 }
47
48
49 GetOrthancWebViewerJpegCommand::GetOrthancWebViewerJpegCommand() :
50 frame_(0),
51 quality_(95),
52 timeout_(10),
53 expectedFormat_(Orthanc::PixelFormat_Grayscale8)
54 {
55 }
56
57
58 void GetOrthancWebViewerJpegCommand::SetQuality(unsigned int quality)
59 {
60 if (quality <= 0 ||
61 quality > 100)
62 {
63 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
64 }
65 else
66 {
67 quality_ = quality;
68 }
69 }
70
71
72 std::string GetOrthancWebViewerJpegCommand::GetUri() const
73 {
74 return ("/web-viewer/instances/jpeg" + boost::lexical_cast<std::string>(quality_) +
75 "-" + instanceId_ + "_" + boost::lexical_cast<std::string>(frame_));
76 }
77
78
79 void GetOrthancWebViewerJpegCommand::ProcessHttpAnswer(IMessageEmitter& emitter,
80 const IObserver& receiver,
81 const std::string& answer) const
82 {
83 // This code comes from older "OrthancSlicesLoader::ParseSliceImageJpeg()"
84
85 Json::Value encoded;
86
87 {
88 Json::Reader reader;
89 if (!reader.parse(answer, encoded))
90 {
91 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
92 }
93 }
94
95 if (encoded.type() != Json::objectValue ||
96 !encoded.isMember("Orthanc") ||
97 encoded["Orthanc"].type() != Json::objectValue)
98 {
99 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
100 }
101
102 const Json::Value& info = encoded["Orthanc"];
103 if (!info.isMember("PixelData") ||
104 !info.isMember("Stretched") ||
105 !info.isMember("Compression") ||
106 info["Compression"].type() != Json::stringValue ||
107 info["PixelData"].type() != Json::stringValue ||
108 info["Stretched"].type() != Json::booleanValue ||
109 info["Compression"].asString() != "Jpeg")
110 {
111 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
112 }
113
114 bool isSigned = false;
115 bool isStretched = info["Stretched"].asBool();
116
117 if (info.isMember("IsSigned"))
118 {
119 if (info["IsSigned"].type() != Json::booleanValue)
120 {
121 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
122 }
123 else
124 {
125 isSigned = info["IsSigned"].asBool();
126 }
127 }
128
129 std::auto_ptr<Orthanc::ImageAccessor> reader;
130
131 {
132 std::string jpeg;
133 Orthanc::Toolbox::DecodeBase64(jpeg, info["PixelData"].asString());
134
135 reader.reset(new Orthanc::JpegReader);
136 dynamic_cast<Orthanc::JpegReader&>(*reader).ReadFromMemory(jpeg);
137 }
138
139 if (reader->GetFormat() == Orthanc::PixelFormat_RGB24) // This is a color image
140 {
141 if (expectedFormat_ != Orthanc::PixelFormat_RGB24)
142 {
143 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
144 }
145
146 if (isSigned || isStretched)
147 {
148 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
149 }
150 else
151 {
152 SuccessMessage message(*this, reader.release());
153 emitter.EmitMessage(receiver, message);
154 return;
155 }
156 }
157
158 if (reader->GetFormat() != Orthanc::PixelFormat_Grayscale8)
159 {
160 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
161 }
162
163 if (!isStretched)
164 {
165 if (expectedFormat_ != reader->GetFormat())
166 {
167 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
168 }
169 else
170 {
171 SuccessMessage message(*this, reader.release());
172 emitter.EmitMessage(receiver, message);
173 return;
174 }
175 }
176
177 int32_t stretchLow = 0;
178 int32_t stretchHigh = 0;
179
180 if (!info.isMember("StretchLow") ||
181 !info.isMember("StretchHigh") ||
182 info["StretchLow"].type() != Json::intValue ||
183 info["StretchHigh"].type() != Json::intValue)
184 {
185 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
186 }
187
188 stretchLow = info["StretchLow"].asInt();
189 stretchHigh = info["StretchHigh"].asInt();
190
191 if (stretchLow < -32768 ||
192 stretchHigh > 65535 ||
193 (stretchLow < 0 && stretchHigh > 32767))
194 {
195 // This range cannot be represented with a uint16_t or an int16_t
196 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
197 }
198
199 // Decode a grayscale JPEG 8bpp image coming from the Web viewer
200 std::auto_ptr<Orthanc::ImageAccessor> image
201 (new Orthanc::Image(expectedFormat_, reader->GetWidth(), reader->GetHeight(), false));
202
203 Orthanc::ImageProcessing::Convert(*image, *reader);
204 reader.reset();
205
206 float scaling = static_cast<float>(stretchHigh - stretchLow) / 255.0f;
207
208 if (!LinearAlgebra::IsCloseToZero(scaling))
209 {
210 float offset = static_cast<float>(stretchLow) / scaling;
211 Orthanc::ImageProcessing::ShiftScale(*image, offset, scaling, true);
212 }
213
214 SuccessMessage message(*this, image.release());
215 emitter.EmitMessage(receiver, message);
216 }
217 }