Mercurial > hg > orthanc-stone
annotate Framework/Layers/GrayscaleFrameRenderer.cpp @ 336:c7fdc8bac581 am-2
creating GrayscaleBitmapStack
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 18 Oct 2018 19:29:14 +0200 |
parents | c80b5bddf86b |
children | b3b3fa0e3689 |
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 | |
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5 * Copyright (C) 2017-2018 Osimis S.A., Belgium |
0 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
47 | 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. | |
0 | 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 | |
47 | 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 | |
0 | 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
19 **/ | |
20 | |
21 | |
22 #include "GrayscaleFrameRenderer.h" | |
23 | |
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24 #include <Core/OrthancException.h> |
0 | 25 |
26 namespace OrthancStone | |
27 { | |
28 CairoSurface* GrayscaleFrameRenderer::GenerateDisplay(const RenderStyle& style) | |
29 { | |
30 std::auto_ptr<CairoSurface> result; | |
31 | |
32 float windowCenter, windowWidth; | |
33 style.ComputeWindowing(windowCenter, windowWidth, | |
34 defaultWindowCenter_, defaultWindowWidth_); | |
35 | |
36 float x0 = windowCenter - windowWidth / 2.0f; | |
37 float x1 = windowCenter + windowWidth / 2.0f; | |
38 | |
39 //LOG(INFO) << "Window: " << x0 << " => " << x1; | |
40 | |
41 result.reset(new CairoSurface(frame_->GetWidth(), frame_->GetHeight())); | |
42 | |
43 const uint8_t* lut = NULL; | |
44 if (style.applyLut_) | |
45 { | |
46 if (Orthanc::EmbeddedResources::GetFileResourceSize(style.lut_) != 3 * 256) | |
47 { | |
48 // Invalid colormap | |
49 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
50 } | |
51 | |
52 lut = reinterpret_cast<const uint8_t*>(Orthanc::EmbeddedResources::GetFileResourceBuffer(style.lut_)); | |
53 } | |
106 | 54 |
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55 Orthanc::ImageAccessor target; |
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56 result->GetAccessor(target); |
106 | 57 const unsigned int width = target.GetWidth(); |
58 const unsigned int height = target.GetHeight(); | |
59 | |
60 for (unsigned int y = 0; y < height; y++) | |
0 | 61 { |
62 const float* p = reinterpret_cast<const float*>(frame_->GetConstRow(y)); | |
63 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); | |
64 | |
106 | 65 for (unsigned int x = 0; x < width; x++, p++, q += 4) |
0 | 66 { |
67 uint8_t v = 0; | |
68 if (windowWidth >= 0.001f) // Avoid division by zero | |
69 { | |
70 if (*p >= x1) | |
71 { | |
72 v = 255; | |
73 } | |
74 else if (*p <= x0) | |
75 { | |
76 v = 0; | |
77 } | |
78 else | |
79 { | |
80 // https://en.wikipedia.org/wiki/Linear_interpolation | |
81 v = static_cast<uint8_t>(255.0f * (*p - x0) / (x1 - x0)); | |
82 } | |
83 | |
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84 if (style.reverse_ ^ (photometric_ == Orthanc::PhotometricInterpretation_Monochrome1)) |
0 | 85 { |
86 v = 255 - v; | |
87 } | |
88 } | |
89 | |
90 if (style.applyLut_) | |
91 { | |
92 assert(lut != NULL); | |
93 q[3] = 255; | |
94 q[2] = lut[3 * v]; | |
95 q[1] = lut[3 * v + 1]; | |
96 q[0] = lut[3 * v + 2]; | |
97 } | |
98 else | |
99 { | |
100 q[3] = 255; | |
101 q[2] = v; | |
102 q[1] = v; | |
103 q[0] = v; | |
104 } | |
105 } | |
106 } | |
107 | |
108 return result.release(); | |
109 } | |
110 | |
111 | |
112 GrayscaleFrameRenderer::GrayscaleFrameRenderer(Orthanc::ImageAccessor* frame, | |
113 const DicomFrameConverter& converter, | |
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114 const CoordinateSystem3D& frameSlice, |
0 | 115 double pixelSpacingX, |
116 double pixelSpacingY, | |
117 bool isFullQuality) : | |
77 | 118 FrameRenderer(frameSlice, pixelSpacingX, pixelSpacingY, isFullQuality), |
0 | 119 frame_(frame), |
120 defaultWindowCenter_(converter.GetDefaultWindowCenter()), | |
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121 defaultWindowWidth_(converter.GetDefaultWindowWidth()), |
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122 photometric_(converter.GetPhotometricInterpretation()) |
0 | 123 { |
124 if (frame == NULL) | |
125 { | |
126 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
127 } | |
128 | |
129 converter.ConvertFrame(frame_); | |
130 assert(frame_.get() != NULL); | |
131 | |
132 if (frame_->GetFormat() != Orthanc::PixelFormat_Float32) | |
133 { | |
134 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); | |
135 } | |
136 } | |
137 } |