Mercurial > hg > orthanc-stone
annotate Framework/Scene2D/Internals/CairoLookupTableTextureRenderer.cpp @ 1163:ba9db2ad317c broker
test log
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 19 Nov 2019 20:44:55 +0100 |
parents | 6e888cf6a48b |
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1 /** |
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2 * Stone of Orthanc |
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
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5 * Copyright (C) 2017-2019 Osimis S.A., Belgium |
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6 * |
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7 * This program is free software: you can redistribute it and/or |
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8 * modify it under the terms of the GNU Affero General Public License |
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9 * as published by the Free Software Foundation, either version 3 of |
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10 * the License, or (at your option) any later version. |
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11 * |
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12 * This program is distributed in the hope that it will be useful, but |
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Affero General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU Affero General Public License |
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 **/ |
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20 |
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21 |
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22 #include "CairoLookupTableTextureRenderer.h" |
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23 |
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24 #include "CairoColorTextureRenderer.h" |
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25 #include "../LookupTableTextureSceneLayer.h" |
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26 |
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27 #include <Core/OrthancException.h> |
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28 |
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29 namespace OrthancStone |
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30 { |
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31 namespace Internals |
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32 { |
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33 void CairoLookupTableTextureRenderer::Update(const ISceneLayer& layer) |
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34 { |
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35 const LookupTableTextureSceneLayer& l = dynamic_cast<const LookupTableTextureSceneLayer&>(layer); |
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36 |
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37 textureTransform_ = l.GetTransform(); |
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38 isLinearInterpolation_ = l.IsLinearInterpolation(); |
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39 |
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40 const float a = l.GetMinValue(); |
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41 float slope; |
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42 |
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43 if (l.GetMinValue() >= l.GetMaxValue()) |
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44 { |
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45 slope = 0; |
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46 } |
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47 else |
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48 { |
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49 slope = 256.0f / (l.GetMaxValue() - l.GetMinValue()); |
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50 } |
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51 |
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52 const Orthanc::ImageAccessor& source = l.GetTexture(); |
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53 const unsigned int width = source.GetWidth(); |
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54 const unsigned int height = source.GetHeight(); |
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55 texture_.SetSize(width, height, true /* alpha channel is enabled */); |
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56 |
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57 Orthanc::ImageAccessor target; |
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58 texture_.GetWriteableAccessor(target); |
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59 |
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60 const std::vector<uint8_t>& lut = l.GetLookupTable(); |
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61 if (lut.size() != 4 * 256) |
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62 { |
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63 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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64 } |
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65 |
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66 assert(source.GetFormat() == Orthanc::PixelFormat_Float32 && |
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67 target.GetFormat() == Orthanc::PixelFormat_BGRA32 && |
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68 sizeof(float) == 4); |
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69 |
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70 for (unsigned int y = 0; y < height; y++) |
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71 { |
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72 const float* p = reinterpret_cast<const float*>(source.GetConstRow(y)); |
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73 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); |
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74 |
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75 for (unsigned int x = 0; x < width; x++) |
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76 { |
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77 float v = (*p - a) * slope; |
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78 if (v <= 0) |
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79 { |
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80 v = 0; |
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81 } |
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82 else if (v >= 255) |
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83 { |
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84 v = 255; |
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85 } |
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86 |
1163 | 87 if (1) //l.IsApplyLog()) |
88 { | |
89 // https://theailearner.com/2019/01/01/log-transformation/ | |
90 v = 255.0f / log(1.0f + 255.0f * 1.5f) * log(1.0f + static_cast<float>(v)); | |
91 if (v <= 0) | |
92 { | |
93 v = 0; | |
94 } | |
95 else if (v >= 255) | |
96 { | |
97 v = 255; | |
98 } | |
99 } | |
100 | |
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101 uint8_t vv = static_cast<uint8_t>(v); |
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102 |
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103 q[0] = lut[4 * vv + 2]; // B |
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104 q[1] = lut[4 * vv + 1]; // G |
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105 q[2] = lut[4 * vv + 0]; // R |
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106 q[3] = lut[4 * vv + 3]; // A |
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107 |
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108 p++; |
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109 q += 4; |
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110 } |
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111 } |
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112 |
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113 cairo_surface_mark_dirty(texture_.GetObject()); |
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114 } |
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115 |
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116 void CairoLookupTableTextureRenderer::Render(const AffineTransform2D& transform, |
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117 unsigned int canvasWidth, |
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118 unsigned int canvasHeight) |
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119 { |
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120 CairoColorTextureRenderer::RenderColorTexture(target_, transform, texture_, |
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121 textureTransform_, isLinearInterpolation_); |
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122 } |
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123 } |
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124 } |