Mercurial > hg > orthanc-stone

annotate Framework/Scene2D/Internals/OpenGLLookupTableTextureRenderer.cpp @ 860:238693c3bc51 am-dev

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merge default -> am-dev
author Alain Mazy <alain@mazy.be>
date Mon, 24 Jun 2019 14:35:00 +0200
parents 266e2b0b9abc
children 6e888cf6a48b
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rev   line source
841
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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 const Orthanc::ImageAccessor& source = layer.GetTexture();
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32 const unsigned int width = source.GetWidth();
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33 const unsigned int height = source.GetHeight();
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34
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35 if ((texture_.get() == NULL) ||
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36 (texture_->GetWidth() != width) ||
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37 (texture_->GetHeight() != height))
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38 {
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39
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40 texture_.reset(new Orthanc::Image(
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41 Orthanc::PixelFormat_RGBA32,
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42 width,
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43 height,
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44 false));
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45 }
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46
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47 {
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48
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49 const float a = layer.GetMinValue();
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50 float slope = 0;
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51
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52 if (layer.GetMinValue() >= layer.GetMaxValue())
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53 {
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54 slope = 0;
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55 }
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56 else
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57 {
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58 slope = 256.0f / (layer.GetMaxValue() - layer.GetMinValue());
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59 }
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60
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61 Orthanc::ImageAccessor target;
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62 texture_->GetWriteableAccessor(target);
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63
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64 const std::vector<uint8_t>& lut = layer.GetLookupTable();
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65 if (lut.size() != 4 * 256)
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66 {
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67 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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68 }
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69
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70 assert(source.GetFormat() == Orthanc::PixelFormat_Float32 &&
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71 target.GetFormat() == Orthanc::PixelFormat_RGBA32 &&
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72 sizeof(float) == 4);
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73
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74 for (unsigned int y = 0; y < height; y++)
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75 {
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76 const float* p = reinterpret_cast<const float*>(source.GetConstRow(y));
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77 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y));
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78
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79 for (unsigned int x = 0; x < width; x++)
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80 {
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81 float v = (*p - a) * slope;
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82 if (v <= 0)
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83 {
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84 v = 0;
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85 }
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86 else if (v >= 255)
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87 {
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88 v = 255;
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89 }
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90
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91 uint8_t vv = static_cast<uint8_t>(v);
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92
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93 q[0] = lut[4 * vv + 0]; // R
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94 q[1] = lut[4 * vv + 1]; // G
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95 q[2] = lut[4 * vv + 2]; // B
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96 q[3] = lut[4 * vv + 3]; // A
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97
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98 p++;
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99 q += 4;
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100 }
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101 }
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102 }
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103
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104 context_.MakeCurrent();
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105 glTexture_.reset(new OpenGL::OpenGLTexture);
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106 glTexture_->Load(*texture_, layer.IsLinearInterpolation());
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107 layerTransform_ = layer.GetTransform();
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108 }
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109
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110
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111 OpenGLLookupTableTextureRenderer::OpenGLLookupTableTextureRenderer(
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112 OpenGL::IOpenGLContext& context,
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113 OpenGLColorTextureProgram& program,
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114 const LookupTableTextureSceneLayer& layer)
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115 : context_(context)
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116 , program_(program)
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117 {
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118 LoadTexture(layer);
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119 }
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120
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121
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122 void OpenGLLookupTableTextureRenderer::Render(const AffineTransform2D& transform)
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123 {
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124 if (glTexture_.get() != NULL)
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125 {
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126 program_.Apply(
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127 *glTexture_,
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128 AffineTransform2D::Combine(transform, layerTransform_),
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129 true);
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130 }
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131 }
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132
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133
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134 void OpenGLLookupTableTextureRenderer::Update(const ISceneLayer& layer)
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135 {
266e2b0b9abc better error reporting in DicomStructureSetLoader + fixed POST request logic
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136 // Should never happen (no revisions in color textures)
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137 LoadTexture(dynamic_cast<const LookupTableTextureSceneLayer&>(layer));
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138 }
266e2b0b9abc better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
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139 }
266e2b0b9abc better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
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140 }