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comparison OrthancStone/Sources/Oracle/GetOrthancWebViewerJpegCommand.cpp @ 1512:244ad1e4e76a

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reorganization of folders
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 07 Jul 2020 16:21:02 +0200
parents Framework/Oracle/GetOrthancWebViewerJpegCommand.cpp@30deba7bc8e2
children 85e117739eca
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1511:9dfeee74c1e6 1512:244ad1e4e76a
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2020 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 <Images/Image.h>
27 #include <Images/ImageProcessing.h>
28 #include <Images/JpegReader.h>
29 #include <OrthancException.h>
30 #include <Toolbox.h>
31
32 #ifdef _MSC_VER
33 // 'Json::Reader': Use CharReader and CharReaderBuilder instead
34 #pragma warning(disable:4996)
35 #endif
36
37 #include <json/reader.h>
38 #include <json/value.h>
39
40 namespace OrthancStone
41 {
42 GetOrthancWebViewerJpegCommand::GetOrthancWebViewerJpegCommand() :
43 frame_(0),
44 quality_(95),
45 timeout_(600),
46 expectedFormat_(Orthanc::PixelFormat_Grayscale8)
47 {
48 }
49
50
51 void GetOrthancWebViewerJpegCommand::SetQuality(unsigned int quality)
52 {
53 if (quality <= 0 ||
54 quality > 100)
55 {
56 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
57 }
58 else
59 {
60 quality_ = quality;
61 }
62 }
63
64
65 std::string GetOrthancWebViewerJpegCommand::GetUri() const
66 {
67 return ("/web-viewer/instances/jpeg" + boost::lexical_cast<std::string>(quality_) +
68 "-" + instanceId_ + "_" + boost::lexical_cast<std::string>(frame_));
69 }
70
71
72 void GetOrthancWebViewerJpegCommand::ProcessHttpAnswer(boost::weak_ptr<IObserver> receiver,
73 IMessageEmitter& emitter,
74 const std::string& answer) const
75 {
76 // This code comes from older "OrthancSlicesLoader::ParseSliceImageJpeg()"
77
78 Json::Value encoded;
79
80 {
81 Json::Reader reader;
82 if (!reader.parse(answer, encoded))
83 {
84 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
85 }
86 }
87
88 if (encoded.type() != Json::objectValue ||
89 !encoded.isMember("Orthanc") ||
90 encoded["Orthanc"].type() != Json::objectValue)
91 {
92 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
93 }
94
95 const Json::Value& info = encoded["Orthanc"];
96 if (!info.isMember("PixelData") ||
97 !info.isMember("Stretched") ||
98 !info.isMember("Compression") ||
99 info["Compression"].type() != Json::stringValue ||
100 info["PixelData"].type() != Json::stringValue ||
101 info["Stretched"].type() != Json::booleanValue ||
102 info["Compression"].asString() != "Jpeg")
103 {
104 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
105 }
106
107 bool isSigned = false;
108 bool isStretched = info["Stretched"].asBool();
109
110 if (info.isMember("IsSigned"))
111 {
112 if (info["IsSigned"].type() != Json::booleanValue)
113 {
114 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
115 }
116 else
117 {
118 isSigned = info["IsSigned"].asBool();
119 }
120 }
121
122 std::unique_ptr<Orthanc::ImageAccessor> reader;
123
124 {
125 std::string jpeg;
126 Orthanc::Toolbox::DecodeBase64(jpeg, info["PixelData"].asString());
127
128 reader.reset(new Orthanc::JpegReader);
129 dynamic_cast<Orthanc::JpegReader&>(*reader).ReadFromMemory(jpeg);
130 }
131
132 if (reader->GetFormat() == Orthanc::PixelFormat_RGB24) // This is a color image
133 {
134 if (expectedFormat_ != Orthanc::PixelFormat_RGB24)
135 {
136 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
137 }
138
139 if (isSigned || isStretched)
140 {
141 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
142 }
143 else
144 {
145 SuccessMessage message(*this, *reader);
146 emitter.EmitMessage(receiver, message);
147 return;
148 }
149 }
150
151 if (reader->GetFormat() != Orthanc::PixelFormat_Grayscale8)
152 {
153 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
154 }
155
156 if (!isStretched)
157 {
158 if (expectedFormat_ != reader->GetFormat())
159 {
160 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
161 }
162 else
163 {
164 SuccessMessage message(*this, *reader);
165 emitter.EmitMessage(receiver, message);
166 return;
167 }
168 }
169
170 int32_t stretchLow = 0;
171 int32_t stretchHigh = 0;
172
173 if (!info.isMember("StretchLow") ||
174 !info.isMember("StretchHigh") ||
175 info["StretchLow"].type() != Json::intValue ||
176 info["StretchHigh"].type() != Json::intValue)
177 {
178 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
179 }
180
181 stretchLow = info["StretchLow"].asInt();
182 stretchHigh = info["StretchHigh"].asInt();
183
184 if (stretchLow < -32768 ||
185 stretchHigh > 65535 ||
186 (stretchLow < 0 && stretchHigh > 32767))
187 {
188 // This range cannot be represented with a uint16_t or an int16_t
189 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
190 }
191
192 // Decode a grayscale JPEG 8bpp image coming from the Web viewer
193 std::unique_ptr<Orthanc::ImageAccessor> image
194 (new Orthanc::Image(expectedFormat_, reader->GetWidth(), reader->GetHeight(), false));
195
196 Orthanc::ImageProcessing::Convert(*image, *reader);
197 reader.reset();
198
199 float scaling = static_cast<float>(stretchHigh - stretchLow) / 255.0f;
200
201 if (!LinearAlgebra::IsCloseToZero(scaling))
202 {
203 float offset = static_cast<float>(stretchLow) / scaling;
204 Orthanc::ImageProcessing::ShiftScale(*image, offset, scaling, true);
205 }
206
207 SuccessMessage message(*this, *image);
208 emitter.EmitMessage(receiver, message);
209 }
210 }