Mercurial > hg > orthanc-stone

annotate Framework/Scene2D/Internals/OpenGLLookupTableTextureRenderer.cpp @ 947:1091b2adeb5a toa2019081001

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Fixed animation frame stopping when returning false + big work on the OpenGL objects to make them lost context-safe + debug code to forcefully tag a context as lost + debug macros
author Benjamin Golinvaux <bgo@osimis.io>
date Sat, 10 Aug 2019 13:07:31 +0200
parents 6e888cf6a48b
children f6be9412e42a
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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 }