Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/OpenGL/OpenGLTexture.cpp @ 2033:23b0a42eea85 deep-learning
added support for floating-point images in OpenGLTexture
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Sun, 22 Jan 2023 10:48:22 +0100 |
parents | d10bab7cc396 |
children | 4b24b7533346 |
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) 2017-2022 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
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7 * |
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8 * This program is free software: you can redistribute it and/or |
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9 * modify it under the terms of the GNU Lesser General Public License |
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10 * as published by the Free Software Foundation, either version 3 of |
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11 * the License, or (at your option) any later version. |
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12 * |
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13 * This program is distributed in the hope that it will be useful, but |
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 * Lesser General Public License for more details. |
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17 * |
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18 * You should have received a copy of the GNU Lesser General Public |
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19 * License along with this program. If not, see |
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20 * <http://www.gnu.org/licenses/>. |
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21 **/ |
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22 |
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23 |
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24 #include "OpenGLTexture.h" |
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25 #include "IOpenGLContext.h" |
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26 |
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27 #include <Images/Image.h> |
1624 | 28 #include <Logging.h> |
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29 #include <OrthancException.h> |
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30 |
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31 namespace OrthancStone |
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32 { |
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33 namespace OpenGL |
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34 { |
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35 OpenGLTexture::OpenGLTexture(OpenGL::IOpenGLContext& context) : |
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36 texture_(0), |
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37 width_(0), |
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38 height_(0), |
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39 context_(context) |
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40 { |
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41 if (!context_.IsContextLost()) |
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42 { |
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43 // Generate a texture object |
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44 glGenTextures(1, &texture_); |
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45 if (texture_ == 0) |
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46 { |
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47 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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48 "Cannot create an OpenGL texture"); |
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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 OpenGLTexture::~OpenGLTexture() |
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54 { |
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55 try |
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56 { |
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57 if (!context_.IsContextLost()) |
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58 { |
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59 assert(texture_ != 0); |
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60 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteTextures"); |
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61 glDeleteTextures(1, &texture_); |
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62 } |
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63 } |
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64 catch (const Orthanc::OrthancException& e) |
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65 { |
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66 if (e.HasDetails()) |
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67 { |
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68 LOG(ERROR) << "OrthancException in ~OpenGLTexture: " << e.What() << " Details: " << e.GetDetails(); |
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69 } |
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70 else |
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71 { |
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72 LOG(ERROR) << "OrthancException in ~OpenGLTexture: " << e.What(); |
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73 } |
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74 } |
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75 catch (const std::exception& e) |
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76 { |
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77 LOG(ERROR) << "std::exception in ~OpenGLTexture: " << e.what(); |
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78 } |
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79 catch (...) |
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80 { |
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81 LOG(ERROR) << "Unknown exception in ~OpenGLTexture"; |
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82 } |
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83 } |
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84 |
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85 void OpenGLTexture::Load(const Orthanc::ImageAccessor& image, |
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86 bool isLinearInterpolation) |
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87 { |
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88 if (!context_.IsContextLost()) |
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89 { |
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90 glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // Disable byte-alignment restriction |
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91 |
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92 if (image.GetPitch() != image.GetBytesPerPixel() * image.GetWidth()) |
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93 { |
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94 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, |
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95 "Pitch is not the same as the row size"); |
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96 } |
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97 |
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98 // Bind it |
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99 glActiveTexture(GL_TEXTURE0); |
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100 glBindTexture(GL_TEXTURE_2D, texture_); |
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101 |
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102 GLenum sourceFormat, internalFormat, pixelType; |
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103 |
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104 switch (image.GetFormat()) |
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105 { |
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106 case Orthanc::PixelFormat_Grayscale8: |
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107 sourceFormat = GL_RED; |
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108 internalFormat = GL_RED; |
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109 pixelType = GL_UNSIGNED_BYTE; |
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110 break; |
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111 |
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112 case Orthanc::PixelFormat_RGB24: |
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113 sourceFormat = GL_RGB; |
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114 internalFormat = GL_RGB; |
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115 pixelType = GL_UNSIGNED_BYTE; |
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116 break; |
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117 |
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118 case Orthanc::PixelFormat_RGBA32: |
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119 sourceFormat = GL_RGBA; |
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120 internalFormat = GL_RGBA; |
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121 pixelType = GL_UNSIGNED_BYTE; |
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122 break; |
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123 |
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124 case Orthanc::PixelFormat_Float32: |
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125 sourceFormat = GL_RED; |
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126 internalFormat = GL_R32F; // Don't use "GL_RED" here, as it clamps to [0,1] |
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127 pixelType = GL_FLOAT; |
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128 break; |
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129 |
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130 default: |
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131 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, |
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132 "No support for this format in OpenGL textures: " + |
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133 std::string(EnumerationToString(image.GetFormat()))); |
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134 } |
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135 |
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136 width_ = image.GetWidth(); |
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137 height_ = image.GetHeight(); |
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138 |
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139 GLint interpolation = (isLinearInterpolation ? GL_LINEAR : GL_NEAREST); |
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140 |
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141 // Load the texture from the image buffer |
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142 glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, image.GetWidth(), image.GetHeight(), |
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143 0, sourceFormat, pixelType, image.GetConstBuffer()); |
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144 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, interpolation); |
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145 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, interpolation); |
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146 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); |
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147 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); |
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148 } |
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149 } |
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150 |
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151 |
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152 void OpenGLTexture::Bind(GLint location) |
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153 { |
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154 glActiveTexture(GL_TEXTURE0); |
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155 glBindTexture(GL_TEXTURE_2D, texture_); |
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156 glUniform1i(location, 0 /* texture unit */); |
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157 } |
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158 |
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159 |
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160 Orthanc::ImageAccessor* OpenGLTexture::Download(Orthanc::PixelFormat format) |
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161 { |
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162 if (context_.IsContextLost()) |
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163 { |
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164 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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165 "OpenGL context is lost"); |
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166 } |
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167 |
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168 std::unique_ptr<Orthanc::ImageAccessor> target(new Orthanc::Image(format, width_, height_, true)); |
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169 assert(target->GetPitch() == width_ * Orthanc::GetBytesPerPixel(format)); |
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170 |
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171 glBindTexture(GL_TEXTURE_2D, texture_); |
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172 |
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173 switch (format) |
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174 { |
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175 case Orthanc::PixelFormat_Grayscale8: |
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176 glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RED, GL_UNSIGNED_BYTE, target->GetBuffer()); |
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177 break; |
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178 |
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179 case Orthanc::PixelFormat_RGB24: |
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180 glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RGB, GL_UNSIGNED_BYTE, target->GetBuffer()); |
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181 break; |
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182 |
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183 case Orthanc::PixelFormat_RGBA32: |
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184 glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RGBA, GL_UNSIGNED_BYTE, target->GetBuffer()); |
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185 break; |
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186 |
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187 case Orthanc::PixelFormat_Float32: |
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188 glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RED, GL_FLOAT, target->GetBuffer()); |
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189 break; |
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190 |
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191 default: |
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192 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); |
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193 } |
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194 |
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195 return target.release(); |
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196 } |
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197 } |
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198 } |