Mercurial > hg > orthanc-stone
annotate Framework/Layers/GrayscaleFrameRenderer.cpp @ 40:7207a407bcd8
shared copyright with osimis
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 04 Jan 2017 16:37:42 +0100 |
parents | ff1e935768e7 |
children | 28956ed68280 |
rev | line source |
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0 | 1 /** |
2 * Stone of Orthanc | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
40
7207a407bcd8
shared copyright with osimis
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
16
diff
changeset
|
5 * Copyright (C) 2017 Osimis, Belgium |
0 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU General Public License as | |
9 * published by the Free Software Foundation, either version 3 of the | |
10 * License, or (at your option) any later version. | |
11 * | |
12 * In addition, as a special exception, the copyright holders of this | |
13 * program give permission to link the code of its release with the | |
14 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
15 * that use the same license as the "OpenSSL" library), and distribute | |
16 * the linked executables. You must obey the GNU General Public License | |
17 * in all respects for all of the code used other than "OpenSSL". If you | |
18 * modify file(s) with this exception, you may extend this exception to | |
19 * your version of the file(s), but you are not obligated to do so. If | |
20 * you do not wish to do so, delete this exception statement from your | |
21 * version. If you delete this exception statement from all source files | |
22 * in the program, then also delete it here. | |
23 * | |
24 * This program is distributed in the hope that it will be useful, but | |
25 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
27 * General Public License for more details. | |
28 * | |
29 * You should have received a copy of the GNU General Public License | |
30 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
31 **/ | |
32 | |
33 | |
34 #include "GrayscaleFrameRenderer.h" | |
35 | |
16 | 36 #include "../../Resources/Orthanc/Core/OrthancException.h" |
0 | 37 |
38 namespace OrthancStone | |
39 { | |
40 CairoSurface* GrayscaleFrameRenderer::GenerateDisplay(const RenderStyle& style) | |
41 { | |
42 std::auto_ptr<CairoSurface> result; | |
43 | |
44 float windowCenter, windowWidth; | |
45 style.ComputeWindowing(windowCenter, windowWidth, | |
46 defaultWindowCenter_, defaultWindowWidth_); | |
47 | |
48 float x0 = windowCenter - windowWidth / 2.0f; | |
49 float x1 = windowCenter + windowWidth / 2.0f; | |
50 | |
51 //LOG(INFO) << "Window: " << x0 << " => " << x1; | |
52 | |
53 result.reset(new CairoSurface(frame_->GetWidth(), frame_->GetHeight())); | |
54 | |
55 const uint8_t* lut = NULL; | |
56 if (style.applyLut_) | |
57 { | |
58 if (Orthanc::EmbeddedResources::GetFileResourceSize(style.lut_) != 3 * 256) | |
59 { | |
60 // Invalid colormap | |
61 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
62 } | |
63 | |
64 lut = reinterpret_cast<const uint8_t*>(Orthanc::EmbeddedResources::GetFileResourceBuffer(style.lut_)); | |
65 } | |
66 | |
67 Orthanc::ImageAccessor target = result->GetAccessor(); | |
68 for (unsigned int y = 0; y < target.GetHeight(); y++) | |
69 { | |
70 const float* p = reinterpret_cast<const float*>(frame_->GetConstRow(y)); | |
71 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); | |
72 | |
73 for (unsigned int x = 0; x < target.GetWidth(); x++, p++, q += 4) | |
74 { | |
75 uint8_t v = 0; | |
76 if (windowWidth >= 0.001f) // Avoid division by zero | |
77 { | |
78 if (*p >= x1) | |
79 { | |
80 v = 255; | |
81 } | |
82 else if (*p <= x0) | |
83 { | |
84 v = 0; | |
85 } | |
86 else | |
87 { | |
88 // https://en.wikipedia.org/wiki/Linear_interpolation | |
89 v = static_cast<uint8_t>(255.0f * (*p - x0) / (x1 - x0)); | |
90 } | |
91 | |
92 if (style.reverse_) | |
93 { | |
94 v = 255 - v; | |
95 } | |
96 } | |
97 | |
98 if (style.applyLut_) | |
99 { | |
100 assert(lut != NULL); | |
101 q[3] = 255; | |
102 q[2] = lut[3 * v]; | |
103 q[1] = lut[3 * v + 1]; | |
104 q[0] = lut[3 * v + 2]; | |
105 } | |
106 else | |
107 { | |
108 q[3] = 255; | |
109 q[2] = v; | |
110 q[1] = v; | |
111 q[0] = v; | |
112 } | |
113 } | |
114 } | |
115 | |
116 return result.release(); | |
117 } | |
118 | |
119 | |
120 GrayscaleFrameRenderer::GrayscaleFrameRenderer(Orthanc::ImageAccessor* frame, | |
121 const DicomFrameConverter& converter, | |
122 const SliceGeometry& viewportSlice, | |
123 const SliceGeometry& frameSlice, | |
124 double pixelSpacingX, | |
125 double pixelSpacingY, | |
126 bool isFullQuality) : | |
127 FrameRenderer(viewportSlice, frameSlice, pixelSpacingX, pixelSpacingY, isFullQuality), | |
128 frame_(frame), | |
129 defaultWindowCenter_(converter.GetDefaultWindowCenter()), | |
130 defaultWindowWidth_(converter.GetDefaultWindowWidth()) | |
131 { | |
132 if (frame == NULL) | |
133 { | |
134 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
135 } | |
136 | |
137 converter.ConvertFrame(frame_); | |
138 assert(frame_.get() != NULL); | |
139 | |
140 if (frame_->GetFormat() != Orthanc::PixelFormat_Float32) | |
141 { | |
142 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); | |
143 } | |
144 } | |
145 } |