Mercurial > hg > orthanc-stone
annotate Framework/Scene2D/Internals/OpenGLLookupTableTextureRenderer.cpp @ 1151:48befc2bf66d broker
ParseDicomFromWadoCommand
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 15 Nov 2019 17:34:19 +0100 |
parents | f6be9412e42a |
children | 177e7d431cd1 2d8ab34c8c91 |
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 #include <Core/OrthancException.h> |
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25 |
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26 namespace OrthancStone |
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27 { |
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28 namespace Internals |
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29 { |
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30 void OpenGLLookupTableTextureRenderer::LoadTexture( |
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31 const LookupTableTextureSceneLayer& layer) |
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32 { |
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33 if (!context_.IsContextLost()) |
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34 { |
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35 const Orthanc::ImageAccessor& source = layer.GetTexture(); |
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36 const unsigned int width = source.GetWidth(); |
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37 const unsigned int height = source.GetHeight(); |
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38 |
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39 if ((texture_.get() == NULL) || |
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40 (texture_->GetWidth() != width) || |
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41 (texture_->GetHeight() != height)) |
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42 { |
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43 |
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44 texture_.reset(new Orthanc::Image( |
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45 Orthanc::PixelFormat_RGBA32, |
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46 width, |
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47 height, |
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48 false)); |
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49 } |
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50 |
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51 { |
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52 |
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53 const float a = layer.GetMinValue(); |
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54 float slope = 0; |
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55 |
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56 if (layer.GetMinValue() >= layer.GetMaxValue()) |
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57 { |
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58 slope = 0; |
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59 } |
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60 else |
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61 { |
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62 slope = 256.0f / (layer.GetMaxValue() - layer.GetMinValue()); |
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63 } |
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64 |
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65 Orthanc::ImageAccessor target; |
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66 texture_->GetWriteableAccessor(target); |
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67 |
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68 const std::vector<uint8_t>& lut = layer.GetLookupTable(); |
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69 if (lut.size() != 4 * 256) |
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70 { |
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71 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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72 } |
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73 |
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74 assert(source.GetFormat() == Orthanc::PixelFormat_Float32 && |
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75 target.GetFormat() == Orthanc::PixelFormat_RGBA32 && |
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76 sizeof(float) == 4); |
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77 |
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78 for (unsigned int y = 0; y < height; y++) |
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79 { |
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80 const float* p = reinterpret_cast<const float*>(source.GetConstRow(y)); |
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81 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); |
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82 |
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83 for (unsigned int x = 0; x < width; x++) |
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84 { |
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85 float v = (*p - a) * slope; |
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86 if (v <= 0) |
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87 { |
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88 v = 0; |
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89 } |
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90 else if (v >= 255) |
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91 { |
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92 v = 255; |
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93 } |
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94 |
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95 uint8_t vv = static_cast<uint8_t>(v); |
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96 |
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97 q[0] = lut[4 * vv + 0]; // R |
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98 q[1] = lut[4 * vv + 1]; // G |
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99 q[2] = lut[4 * vv + 2]; // B |
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100 q[3] = lut[4 * vv + 3]; // A |
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101 |
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102 p++; |
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103 q += 4; |
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104 } |
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105 } |
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106 } |
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107 |
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108 context_.MakeCurrent(); |
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109 glTexture_.reset(new OpenGL::OpenGLTexture(context_)); |
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110 glTexture_->Load(*texture_, layer.IsLinearInterpolation()); |
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111 layerTransform_ = layer.GetTransform(); |
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112 } |
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113 } |
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114 |
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115 OpenGLLookupTableTextureRenderer::OpenGLLookupTableTextureRenderer( |
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116 OpenGL::IOpenGLContext& context, |
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117 OpenGLColorTextureProgram& program, |
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118 const LookupTableTextureSceneLayer& layer) |
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119 : context_(context) |
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120 , program_(program) |
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121 { |
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122 LoadTexture(layer); |
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123 } |
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124 |
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125 |
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126 void OpenGLLookupTableTextureRenderer::Render(const AffineTransform2D& transform, |
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127 unsigned int canvasWidth, |
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128 unsigned int canvasHeight) |
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129 { |
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130 if (!context_.IsContextLost() && glTexture_.get() != NULL) |
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131 { |
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132 program_.Apply( |
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133 *glTexture_, |
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134 AffineTransform2D::Combine(transform, layerTransform_), |
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135 true); |
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136 } |
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137 } |
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138 |
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139 |
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140 void OpenGLLookupTableTextureRenderer::Update(const ISceneLayer& layer) |
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141 { |
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142 // Should never happen (no revisions in color textures) |
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143 LoadTexture(dynamic_cast<const LookupTableTextureSceneLayer&>(layer)); |
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144 } |
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145 } |
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146 } |