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annotate OrthancStone/Sources/OpenGL/OpenGLTextureArray.cpp @ 2063:b6b5e1ca1cc2 deep-learning

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 03 May 2023 22:00:38 +0200
parents f5db73779f2d
children 15f2e52835a1
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2060
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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 "OpenGLTextureArray.h"
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25
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26 #if defined(__EMSCRIPTEN__)
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27 # if !defined(ORTHANC_WEBGL2_HEAP_COMPAT)
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28 # error The macro ORTHANC_WEBGL2_HEAP_COMPAT must be defined
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29 # endif
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30 #endif
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31
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32 #include "OpenGLFramebuffer.h"
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33 #include "OpenGLTexture.h"
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34
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35 #include <Images/Image.h>
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36 #include <OrthancException.h>
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37
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38 #include <boost/lexical_cast.hpp>
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39 #include <cassert>
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40
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41 namespace OrthancStone
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42 {
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43 namespace OpenGL
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44 {
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45 OpenGLTextureArray::OpenGLTextureArray(IOpenGLContext& context) :
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46 context_(context),
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47 texture_(0),
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48 width_(0),
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49 height_(0),
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50 depth_(0),
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51 format_(Orthanc::PixelFormat_Float32),
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52 isLinearInterpolation_(false)
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53 {
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54 if (context.IsContextLost())
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55 {
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56 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
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57 "OpenGL context has been lost");
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58 }
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59
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60 glGenTextures(1, &texture_);
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61 ORTHANC_OPENGL_CHECK("glGenTextures()");
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62
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63 if (texture_ == 0)
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64 {
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65 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
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66 "Cannot create an OpenGL texture array");
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67 }
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68 }
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69
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70
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71 OpenGLTextureArray::~OpenGLTextureArray()
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72 {
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73 assert(texture_ != 0);
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74 glDeleteTextures(1, &texture_);
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75 }
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76
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77
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78 void OpenGLTextureArray::Setup(Orthanc::PixelFormat format,
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79 unsigned int width,
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80 unsigned int height,
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81 unsigned int depth,
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82 bool isLinearInterpolation)
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83 {
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84 glActiveTexture(GL_TEXTURE0);
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85 glBindTexture(GL_TEXTURE_2D_ARRAY, texture_);
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86 ORTHANC_OPENGL_CHECK("glBindTexture(GL_TEXTURE_2D_ARRAY)");
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87
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88 GLenum sourceFormat, internalFormat, pixelType;
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89 OpenGLTexture::ConvertToOpenGLFormats(sourceFormat, internalFormat, pixelType, format);
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90
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91 glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, internalFormat, width, height, depth,
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92 0, sourceFormat, pixelType, NULL);
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93 ORTHANC_OPENGL_CHECK("glTexImage3D()");
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94
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95 #if !defined(__EMSCRIPTEN__)
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96 /**
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97 * glGetTexLevelParameteriv() was introduced in OpenGL ES 3.1,
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98 * but WebGL 2 only supports OpenGL ES 3.0, so it is not
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99 * available in WebAssembly:
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100 * https://registry.khronos.org/OpenGL-Refpages/es3.1/html/glGetTexLevelParameter.xhtml
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101 **/
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102 GLint w, h, d;
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103 glGetTexLevelParameteriv(GL_TEXTURE_2D_ARRAY, 0, GL_TEXTURE_WIDTH, &w);
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104 glGetTexLevelParameteriv(GL_TEXTURE_2D_ARRAY, 0, GL_TEXTURE_HEIGHT, &h);
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105 glGetTexLevelParameteriv(GL_TEXTURE_2D_ARRAY, 0, GL_TEXTURE_DEPTH, &d);
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106 if (width != static_cast<unsigned int>(w) ||
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107 height != static_cast<unsigned int>(h) ||
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108 depth != static_cast<unsigned int>(d))
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109 {
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110 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
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111 "Your GPU cannot create an array of textures of size " +
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112 boost::lexical_cast<std::string>(width) + " x " +
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113 boost::lexical_cast<std::string>(height) + " x " +
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114 boost::lexical_cast<std::string>(depth));
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115 }
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116 #endif
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117
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118 format_ = format;
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119 width_ = width;
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120 height_ = height;
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121 depth_ = depth;
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122 isLinearInterpolation_ = isLinearInterpolation;
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123
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124 GLint interpolation = (isLinearInterpolation ? GL_LINEAR : GL_NEAREST);
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125 glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, interpolation);
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126 glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, interpolation);
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127 glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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128 glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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129 }
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130
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131
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132 void OpenGLTextureArray::SetClampingToZero()
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133 {
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134 #if defined(__EMSCRIPTEN__)
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135 /**
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136 * This is because WebGL 2 derives from OpenGL ES 3.0, which
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137 * doesn't support GL_CLAMP_TO_BORDER, as can be seen here:
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138 * https://registry.khronos.org/OpenGL-Refpages/es3.0/html/glTexParameter.xhtml
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139 **/
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140 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
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141 "OpenGLTextureArray::SetClampingToZero() is not available in WebGL 2");
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142 #else
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143 ORTHANC_OPENGL_CHECK("Entering OpenGLTextureArray::SetClampingToZero()");
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144
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145 glBindTexture(GL_TEXTURE_2D_ARRAY, texture_);
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146 glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
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147 glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
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148
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149 GLfloat colorfv[4] = { 0, 0, 0, 0 };
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150 glTexParameterfv(texture_, GL_TEXTURE_BORDER_COLOR, colorfv);
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151
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152 ORTHANC_OPENGL_CHECK("Exiting OpenGLTextureArray::SetClampingToZero()");
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153 #endif
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154 }
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155
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156
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157 void OpenGLTextureArray::Bind(GLint location) const
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158 {
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159 glActiveTexture(GL_TEXTURE0);
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160 glBindTexture(GL_TEXTURE_2D_ARRAY, texture_);
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161 glUniform1i(location, 0 /* texture unit */);
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162 }
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163
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164
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165 void OpenGLTextureArray::BindAsTextureUnit(GLint location,
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166 unsigned int unit) const
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167 {
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168 if (unit >= 32)
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169 {
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170 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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171 }
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172
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173 assert(GL_TEXTURE0 + 1 == GL_TEXTURE1 &&
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174 GL_TEXTURE0 + 31 == GL_TEXTURE31);
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175
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176 glActiveTexture(GL_TEXTURE0 + unit);
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177 glBindTexture(GL_TEXTURE_2D_ARRAY, texture_);
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178 glUniform1i(location, unit /* texture unit */);
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179 }
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180
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181
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182 void OpenGLTextureArray::Upload(const Orthanc::ImageAccessor& image,
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183 unsigned int layer)
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184 {
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185 if (image.GetWidth() != width_ ||
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186 image.GetHeight() != height_)
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187 {
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188 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageSize);
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189 }
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190
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191 if (layer >= depth_)
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192 {
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193 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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194 }
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195
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196 if (width_ != 0 &&
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197 height_ != 0)
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198 {
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199 GLenum sourceFormat, internalFormat, pixelType;
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200 OpenGLTexture::ConvertToOpenGLFormats(sourceFormat, internalFormat, pixelType, image.GetFormat());
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201
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202 glBindTexture(GL_TEXTURE_2D_ARRAY, texture_);
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203
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204 #if defined(__EMSCRIPTEN__) && (ORTHANC_WEBGL2_HEAP_COMPAT == 1)
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205 // Check out "OpenGLTexture.cpp" for an explanation
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206 EM_ASM({
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207 var ptr = emscriptenWebGLGetTexPixelData($5, $4, $2, $3, $0, $1);
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208 GLctx.texSubImage3D(GLctx.TEXTURE_2D_ARRAY, 0, 0 /* x offset */, 0 /* y offset */,
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209 $6, $2, $3, 1 /* depth */, $4, $5, ptr);
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210 },
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211 image.GetConstBuffer(), // $0
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212 internalFormat, // $1
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213 image.GetWidth(), // $2
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214 image.GetHeight(), // $3
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215 sourceFormat, // $4
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216 pixelType, // $5
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217 layer); // $6
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218 #else
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219 glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0 /* x offset */, 0 /* y offset */, layer /* z offset */,
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220 width_, height_, 1 /* depth */, sourceFormat, pixelType, image.GetConstBuffer());
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221 #endif
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222 }
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223 }
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224
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225
2063
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226 OpenGLTextureArray::DownloadedArray::DownloadedArray(const OpenGLTextureArray& texture) :
2060
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227 format_(texture.format_),
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228 width_(texture.width_),
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229 height_(texture.height_),
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230 depth_(texture.depth_)
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231 {
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232 if (width_ != 0 &&
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233 height_ != 0 &&
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234 depth_ != 0)
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235 {
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236 buffer_.resize(Orthanc::GetBytesPerPixel(format_) * width_ * height_ * depth_);
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237 assert(buffer_.size() > 0);
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238
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239 #if 1 || defined(__EMSCRIPTEN__)
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240 /**
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241 * The "glGetTexImage()" function is unavailable in WebGL, it
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242 * is necessary to use a framebuffer:
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243 * https://stackoverflow.com/a/15064957
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244 **/
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245 OpenGLFramebuffer framebuffer(texture.context_);
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246
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247 Orthanc::Image tmp(texture.GetFormat(), texture.GetWidth(), texture.GetHeight(), true);
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248
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249 for (unsigned int layer = 0; layer < depth_; layer++)
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250 {
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251 framebuffer.ReadTexture(tmp, texture, layer);
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252 memcpy(&buffer_[0] + layer * tmp.GetPitch() * height_,
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253 tmp.GetBuffer(), tmp.GetPitch() * height_);
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254 }
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255
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256 #else
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257 glBindTexture(GL_TEXTURE_2D_ARRAY, texture.texture_);
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258
2062
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259 switch (format_)
2060
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260 {
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261 case Orthanc::PixelFormat_Grayscale8:
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262 glGetTexImage(GL_TEXTURE_2D_ARRAY, 0 /* base level */, GL_RED, GL_UNSIGNED_BYTE, &buffer_[0]);
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263 break;
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264
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265 case Orthanc::PixelFormat_RGB24:
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266 glGetTexImage(GL_TEXTURE_2D_ARRAY, 0 /* base level */, GL_RGB, GL_UNSIGNED_BYTE, &buffer_[0]);
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267 break;
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268
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269 case Orthanc::PixelFormat_RGBA32:
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270 glGetTexImage(GL_TEXTURE_2D_ARRAY, 0 /* base level */, GL_RGBA, GL_UNSIGNED_BYTE, &buffer_[0]);
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271 break;
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272
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273 case Orthanc::PixelFormat_Float32:
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274 glGetTexImage(GL_TEXTURE_2D_ARRAY, 0 /* base level */, GL_RED, GL_FLOAT, &buffer_[0]);
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275 break;
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276
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277 default:
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278 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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279 }
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280 #endif
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281 }
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282 }
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283
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284
2063
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285 Orthanc::ImageAccessor* OpenGLTextureArray::DownloadedArray::GetLayer(unsigned int layer) const
2060
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286 {
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287 if (layer >= depth_)
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288 {
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289 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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290 }
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291 else if (width_ == 0 ||
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292 height_ == 0 ||
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293 depth_ == 0)
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294 {
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295 return new Orthanc::Image(format_, 0, 0, true);
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296 }
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297 else
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298 {
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299 const size_t rowSize = width_ * Orthanc::GetBytesPerPixel(format_);
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300
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301 std::unique_ptr<Orthanc::ImageAccessor> target(new Orthanc::ImageAccessor);
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302 target->AssignReadOnly(format_, width_, height_, rowSize,
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303 reinterpret_cast<const uint8_t*>(buffer_.c_str()) + layer * height_ * rowSize);
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304 return target.release();
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305 }
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306 }
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307 }
86e0e92a2e0d added OpenGLTextureArray and OpenGLFramebuffer
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diff changeset
308 }