Mercurial > hg > orthanc-stone
annotate Framework/Scene2D/Internals/OpenGLLookupTableTextureRenderer.cpp @ 1015:24fecc02bfb1
SlicesSorter::AreAllSlicesDistinct()
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 24 Sep 2019 11:16:25 +0200 |
parents | 1091b2adeb5a |
children | f6be9412e42a |
rev | line source |
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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 "OpenGLLookupTableTextureRenderer.h" |
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23 |
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24 namespace OrthancStone |
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25 { |
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26 namespace Internals |
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27 { |
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28 void OpenGLLookupTableTextureRenderer::LoadTexture( |
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29 const LookupTableTextureSceneLayer& layer) |
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30 { |
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31 if (!context_.IsContextLost()) |
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32 { |
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33 const Orthanc::ImageAccessor& source = layer.GetTexture(); |
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34 const unsigned int width = source.GetWidth(); |
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35 const unsigned int height = source.GetHeight(); |
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36 |
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37 if ((texture_.get() == NULL) || |
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38 (texture_->GetWidth() != width) || |
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39 (texture_->GetHeight() != height)) |
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40 { |
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41 |
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42 texture_.reset(new Orthanc::Image( |
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43 Orthanc::PixelFormat_RGBA32, |
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44 width, |
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45 height, |
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46 false)); |
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47 } |
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48 |
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49 { |
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50 |
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51 const float a = layer.GetMinValue(); |
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52 float slope = 0; |
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53 |
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54 if (layer.GetMinValue() >= layer.GetMaxValue()) |
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55 { |
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56 slope = 0; |
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57 } |
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58 else |
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59 { |
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60 slope = 256.0f / (layer.GetMaxValue() - layer.GetMinValue()); |
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61 } |
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62 |
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63 Orthanc::ImageAccessor target; |
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64 texture_->GetWriteableAccessor(target); |
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65 |
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66 const std::vector<uint8_t>& lut = layer.GetLookupTable(); |
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67 if (lut.size() != 4 * 256) |
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68 { |
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69 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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70 } |
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71 |
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72 assert(source.GetFormat() == Orthanc::PixelFormat_Float32 && |
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73 target.GetFormat() == Orthanc::PixelFormat_RGBA32 && |
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74 sizeof(float) == 4); |
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75 |
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76 for (unsigned int y = 0; y < height; y++) |
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77 { |
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78 const float* p = reinterpret_cast<const float*>(source.GetConstRow(y)); |
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79 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); |
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80 |
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81 for (unsigned int x = 0; x < width; x++) |
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82 { |
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83 float v = (*p - a) * slope; |
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84 if (v <= 0) |
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85 { |
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86 v = 0; |
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87 } |
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88 else if (v >= 255) |
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89 { |
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90 v = 255; |
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91 } |
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92 |
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93 uint8_t vv = static_cast<uint8_t>(v); |
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94 |
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95 q[0] = lut[4 * vv + 0]; // R |
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96 q[1] = lut[4 * vv + 1]; // G |
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97 q[2] = lut[4 * vv + 2]; // B |
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98 q[3] = lut[4 * vv + 3]; // A |
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99 |
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100 p++; |
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101 q += 4; |
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102 } |
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103 } |
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104 } |
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105 |
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106 context_.MakeCurrent(); |
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107 glTexture_.reset(new OpenGL::OpenGLTexture(context_)); |
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108 glTexture_->Load(*texture_, layer.IsLinearInterpolation()); |
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109 layerTransform_ = layer.GetTransform(); |
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110 } |
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111 } |
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112 |
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113 OpenGLLookupTableTextureRenderer::OpenGLLookupTableTextureRenderer( |
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114 OpenGL::IOpenGLContext& context, |
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115 OpenGLColorTextureProgram& program, |
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116 const LookupTableTextureSceneLayer& layer) |
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117 : context_(context) |
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118 , program_(program) |
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119 { |
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120 LoadTexture(layer); |
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121 } |
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122 |
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123 |
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124 void OpenGLLookupTableTextureRenderer::Render(const AffineTransform2D& transform, |
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125 unsigned int canvasWidth, |
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126 unsigned int canvasHeight) |
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127 { |
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128 if (!context_.IsContextLost() && glTexture_.get() != NULL) |
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129 { |
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130 program_.Apply( |
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131 *glTexture_, |
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132 AffineTransform2D::Combine(transform, layerTransform_), |
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133 true); |
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134 } |
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135 } |
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136 |
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137 |
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138 void OpenGLLookupTableTextureRenderer::Update(const ISceneLayer& layer) |
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139 { |
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140 // Should never happen (no revisions in color textures) |
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141 LoadTexture(dynamic_cast<const LookupTableTextureSceneLayer&>(layer)); |
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142 } |
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143 } |
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144 } |