Mercurial > hg > orthanc-stone
comparison Framework/Layers/GrayscaleFrameRenderer.cpp @ 0:351ab0da0150
initial commit
author | Sebastien Jodogne <s.jodogne@gmail.com> |
---|---|
date | Fri, 14 Oct 2016 15:34:11 +0200 |
parents | |
children | ff1e935768e7 |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:351ab0da0150 |
---|---|
1 /** | |
2 * Stone of Orthanc | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
5 * | |
6 * This program is free software: you can redistribute it and/or | |
7 * modify it under the terms of the GNU General Public License as | |
8 * published by the Free Software Foundation, either version 3 of the | |
9 * License, or (at your option) any later version. | |
10 * | |
11 * In addition, as a special exception, the copyright holders of this | |
12 * program give permission to link the code of its release with the | |
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
14 * that use the same license as the "OpenSSL" library), and distribute | |
15 * the linked executables. You must obey the GNU General Public License | |
16 * in all respects for all of the code used other than "OpenSSL". If you | |
17 * modify file(s) with this exception, you may extend this exception to | |
18 * your version of the file(s), but you are not obligated to do so. If | |
19 * you do not wish to do so, delete this exception statement from your | |
20 * version. If you delete this exception statement from all source files | |
21 * in the program, then also delete it here. | |
22 * | |
23 * This program is distributed in the hope that it will be useful, but | |
24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
26 * General Public License for more details. | |
27 * | |
28 * You should have received a copy of the GNU General Public License | |
29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
30 **/ | |
31 | |
32 | |
33 #include "GrayscaleFrameRenderer.h" | |
34 | |
35 #include "../Orthanc/Core/OrthancException.h" | |
36 | |
37 namespace OrthancStone | |
38 { | |
39 CairoSurface* GrayscaleFrameRenderer::GenerateDisplay(const RenderStyle& style) | |
40 { | |
41 std::auto_ptr<CairoSurface> result; | |
42 | |
43 float windowCenter, windowWidth; | |
44 style.ComputeWindowing(windowCenter, windowWidth, | |
45 defaultWindowCenter_, defaultWindowWidth_); | |
46 | |
47 float x0 = windowCenter - windowWidth / 2.0f; | |
48 float x1 = windowCenter + windowWidth / 2.0f; | |
49 | |
50 //LOG(INFO) << "Window: " << x0 << " => " << x1; | |
51 | |
52 result.reset(new CairoSurface(frame_->GetWidth(), frame_->GetHeight())); | |
53 | |
54 const uint8_t* lut = NULL; | |
55 if (style.applyLut_) | |
56 { | |
57 if (Orthanc::EmbeddedResources::GetFileResourceSize(style.lut_) != 3 * 256) | |
58 { | |
59 // Invalid colormap | |
60 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
61 } | |
62 | |
63 lut = reinterpret_cast<const uint8_t*>(Orthanc::EmbeddedResources::GetFileResourceBuffer(style.lut_)); | |
64 } | |
65 | |
66 Orthanc::ImageAccessor target = result->GetAccessor(); | |
67 for (unsigned int y = 0; y < target.GetHeight(); y++) | |
68 { | |
69 const float* p = reinterpret_cast<const float*>(frame_->GetConstRow(y)); | |
70 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); | |
71 | |
72 for (unsigned int x = 0; x < target.GetWidth(); x++, p++, q += 4) | |
73 { | |
74 uint8_t v = 0; | |
75 if (windowWidth >= 0.001f) // Avoid division by zero | |
76 { | |
77 if (*p >= x1) | |
78 { | |
79 v = 255; | |
80 } | |
81 else if (*p <= x0) | |
82 { | |
83 v = 0; | |
84 } | |
85 else | |
86 { | |
87 // https://en.wikipedia.org/wiki/Linear_interpolation | |
88 v = static_cast<uint8_t>(255.0f * (*p - x0) / (x1 - x0)); | |
89 } | |
90 | |
91 if (style.reverse_) | |
92 { | |
93 v = 255 - v; | |
94 } | |
95 } | |
96 | |
97 if (style.applyLut_) | |
98 { | |
99 assert(lut != NULL); | |
100 q[3] = 255; | |
101 q[2] = lut[3 * v]; | |
102 q[1] = lut[3 * v + 1]; | |
103 q[0] = lut[3 * v + 2]; | |
104 } | |
105 else | |
106 { | |
107 q[3] = 255; | |
108 q[2] = v; | |
109 q[1] = v; | |
110 q[0] = v; | |
111 } | |
112 } | |
113 } | |
114 | |
115 return result.release(); | |
116 } | |
117 | |
118 | |
119 GrayscaleFrameRenderer::GrayscaleFrameRenderer(Orthanc::ImageAccessor* frame, | |
120 const DicomFrameConverter& converter, | |
121 const SliceGeometry& viewportSlice, | |
122 const SliceGeometry& frameSlice, | |
123 double pixelSpacingX, | |
124 double pixelSpacingY, | |
125 bool isFullQuality) : | |
126 FrameRenderer(viewportSlice, frameSlice, pixelSpacingX, pixelSpacingY, isFullQuality), | |
127 frame_(frame), | |
128 defaultWindowCenter_(converter.GetDefaultWindowCenter()), | |
129 defaultWindowWidth_(converter.GetDefaultWindowWidth()) | |
130 { | |
131 if (frame == NULL) | |
132 { | |
133 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
134 } | |
135 | |
136 converter.ConvertFrame(frame_); | |
137 assert(frame_.get() != NULL); | |
138 | |
139 if (frame_->GetFormat() != Orthanc::PixelFormat_Float32) | |
140 { | |
141 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); | |
142 } | |
143 } | |
144 } |