Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/OpenGL/OpenGLTexture.cpp @ 2060:86e0e92a2e0d deep-learning
added OpenGLTextureArray and OpenGLFramebuffer
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 03 May 2023 16:15:50 +0200 |
parents | c0627145b441 |
children | 6ea5f40ea0e9 |
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 |
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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 <Images/Image.h> |
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33 #include <Logging.h> |
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34 #include <OrthancException.h> |
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35 |
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36 namespace OrthancStone |
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37 { |
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38 namespace OpenGL |
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39 { |
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40 OpenGLTexture::OpenGLTexture(OpenGL::IOpenGLContext& context) : |
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41 context_(context), |
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42 texture_(0), |
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43 width_(0), |
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44 height_(0), |
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45 format_(Orthanc::PixelFormat_Grayscale8), |
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46 isLinearInterpolation_(false) |
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47 { |
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48 if (!context_.IsContextLost()) |
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49 { |
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50 // Generate a texture object |
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51 glGenTextures(1, &texture_); |
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52 ORTHANC_OPENGL_CHECK("glGenTextures()"); |
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53 |
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54 if (texture_ == 0) |
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55 { |
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56 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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57 "Cannot create an OpenGL texture"); |
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58 } |
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59 } |
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60 } |
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61 |
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62 OpenGLTexture::~OpenGLTexture() |
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63 { |
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64 try |
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65 { |
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66 if (!context_.IsContextLost()) |
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67 { |
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68 assert(texture_ != 0); |
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69 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteTextures"); |
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70 glDeleteTextures(1, &texture_); |
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71 } |
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72 } |
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73 catch (const Orthanc::OrthancException& e) |
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74 { |
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75 if (e.HasDetails()) |
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76 { |
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77 LOG(ERROR) << "OrthancException in ~OpenGLTexture: " << e.What() << " Details: " << e.GetDetails(); |
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78 } |
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79 else |
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80 { |
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81 LOG(ERROR) << "OrthancException in ~OpenGLTexture: " << e.What(); |
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82 } |
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83 } |
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84 catch (const std::exception& e) |
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85 { |
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86 LOG(ERROR) << "std::exception in ~OpenGLTexture: " << e.what(); |
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87 } |
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88 catch (...) |
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89 { |
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90 LOG(ERROR) << "Unknown exception in ~OpenGLTexture"; |
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91 } |
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92 } |
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93 |
2034 | 94 void OpenGLTexture::Setup(Orthanc::PixelFormat format, |
95 unsigned int width, | |
96 unsigned int height, | |
97 bool isLinearInterpolation, | |
98 const void* data) | |
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99 { |
2034 | 100 if (context_.IsContextLost()) |
101 { | |
102 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, | |
103 "OpenGL context has been lost"); | |
104 } | |
105 else | |
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106 { |
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107 glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // Disable byte-alignment restriction |
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108 |
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109 // Bind it |
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110 glActiveTexture(GL_TEXTURE0); |
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111 glBindTexture(GL_TEXTURE_2D, texture_); |
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112 |
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113 GLenum sourceFormat, internalFormat, pixelType; |
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114 ConvertToOpenGLFormats(sourceFormat, internalFormat, pixelType, format); |
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115 |
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116 format_ = format; |
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118 height_ = height; | |
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119 isLinearInterpolation_ = isLinearInterpolation; |
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120 |
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121 GLint interpolation = (isLinearInterpolation ? GL_LINEAR : GL_NEAREST); |
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122 |
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123 // Load the texture from the image buffer |
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124 |
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125 #if defined(__EMSCRIPTEN__) && (ORTHANC_WEBGL2_HEAP_COMPAT == 1) |
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126 /** |
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127 * This compatibility implementation seems to be necessary |
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128 * with WebGL2, at least in Web workers. In such a situation, |
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129 * the calls that are referred to as the "new garbage-free |
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130 * entry points" in the Emscripten source file |
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131 * "upstream/emscripten/src/library_webgl.js" seem to fail, |
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132 * because the "Uint8Array" and "Float32Array" seem to be |
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133 * incorrectly created. This compatibility reverts to the |
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134 * WebGL1 behavior of "library_webgl.js", which requires the |
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135 * function "emscriptenWebGLGetTexPixelData" that is defined |
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136 * in "upstream/emscripten/src/library_webgl.js" to be |
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137 * exported in the linker using option |
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138 * "EXTRA_EXPORTED_RUNTIME_METHODS" or |
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139 * "EXPORTED_RUNTIME_METHODS". |
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140 **/ |
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141 EM_ASM({ |
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142 var ptr = $0 ? emscriptenWebGLGetTexPixelData($5, $4, $2, $3, $0, $1) : null; |
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143 GLctx.texImage2D(GLctx.TEXTURE_2D, 0, $1, $2, $3, 0, $4, $5, ptr); |
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144 }, |
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145 data, // $0 |
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146 internalFormat, // $1 |
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147 width, // $2 |
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148 height, // $3 |
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149 sourceFormat, // $4 |
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150 pixelType); // $5 |
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151 #else |
2034 | 152 glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, |
153 0, sourceFormat, pixelType, data); | |
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154 #endif |
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155 |
2046 | 156 ORTHANC_OPENGL_CHECK("glTexImage2D()"); |
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157 |
2043 | 158 #if !defined(__EMSCRIPTEN__) |
2046 | 159 /** |
160 * glGetTexLevelParameteriv() was introduced in OpenGL ES 3.1, | |
161 * but WebGL 2 only supports OpenGL ES 3.0, so it is not | |
162 * available in WebAssembly: | |
163 * https://registry.khronos.org/OpenGL-Refpages/es3.1/html/glGetTexLevelParameter.xhtml | |
164 **/ | |
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165 GLint w, h; |
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166 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &w); |
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167 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &h); |
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168 if (width != static_cast<unsigned int>(w) || |
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169 height != static_cast<unsigned int>(h)) |
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170 { |
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171 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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172 "Your GPU cannot create a texture of size " + |
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173 boost::lexical_cast<std::string>(width) + " x " + |
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174 boost::lexical_cast<std::string>(height)); |
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175 } |
2043 | 176 #endif |
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177 |
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178 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, interpolation); |
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179 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, interpolation); |
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180 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); |
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181 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); |
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182 } |
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183 } |
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184 |
2034 | 185 void OpenGLTexture::Load(const Orthanc::ImageAccessor& image, |
186 bool isLinearInterpolation) | |
187 { | |
188 if (image.GetPitch() != image.GetBytesPerPixel() * image.GetWidth()) | |
189 { | |
190 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, | |
191 "Pitch is not the same as the row size"); | |
192 } | |
193 else | |
194 { | |
195 Setup(image.GetFormat(), image.GetWidth(), image.GetHeight(), | |
196 isLinearInterpolation, image.GetConstBuffer()); | |
197 } | |
198 } | |
199 | |
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200 |
2039 | 201 void OpenGLTexture::Bind(GLint location) const |
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202 { |
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203 glActiveTexture(GL_TEXTURE0); |
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204 glBindTexture(GL_TEXTURE_2D, texture_); |
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205 glUniform1i(location, 0 /* texture unit */); |
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206 } |
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207 |
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208 |
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209 void OpenGLTexture::BindAsTextureUnit(GLint location, |
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210 unsigned int unit) const |
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211 { |
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212 if (unit >= 32) |
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213 { |
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214 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); |
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215 } |
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216 |
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217 assert(GL_TEXTURE0 + 1 == GL_TEXTURE1 && |
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218 GL_TEXTURE0 + 31 == GL_TEXTURE31); |
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219 |
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220 glActiveTexture(GL_TEXTURE0 + unit); |
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221 glBindTexture(GL_TEXTURE_2D, texture_); |
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222 glUniform1i(location, unit /* texture unit */); |
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223 } |
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224 |
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225 |
2039 | 226 Orthanc::ImageAccessor* OpenGLTexture::Download(Orthanc::PixelFormat format) const |
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227 { |
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228 if (context_.IsContextLost()) |
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229 { |
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230 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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231 "OpenGL context is lost"); |
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232 } |
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233 |
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234 std::unique_ptr<Orthanc::ImageAccessor> target(new Orthanc::Image(format, width_, height_, true)); |
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235 assert(target->GetPitch() == width_ * Orthanc::GetBytesPerPixel(format)); |
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236 |
2044 | 237 #if defined(__EMSCRIPTEN__) |
238 /** | |
239 * The "glGetTexImage()" is unavailable in WebGL, it is | |
240 * necessary to use a framebuffer: | |
241 * https://stackoverflow.com/a/15064957 | |
242 **/ | |
243 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
244 | |
245 #else | |
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246 glBindTexture(GL_TEXTURE_2D, texture_); |
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247 |
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248 switch (format) |
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249 { |
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250 case Orthanc::PixelFormat_Grayscale8: |
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251 glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RED, GL_UNSIGNED_BYTE, target->GetBuffer()); |
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252 break; |
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253 |
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254 case Orthanc::PixelFormat_RGB24: |
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255 glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RGB, GL_UNSIGNED_BYTE, target->GetBuffer()); |
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256 break; |
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257 |
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258 case Orthanc::PixelFormat_RGBA32: |
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259 glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RGBA, GL_UNSIGNED_BYTE, target->GetBuffer()); |
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260 break; |
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261 |
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262 case Orthanc::PixelFormat_Float32: |
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263 glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RED, GL_FLOAT, target->GetBuffer()); |
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264 break; |
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265 |
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266 default: |
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267 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); |
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268 } |
2044 | 269 #endif |
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270 |
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271 return target.release(); |
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272 } |
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273 |
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274 |
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275 void OpenGLTexture::SetClampingToZero() |
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276 { |
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277 #if defined(__EMSCRIPTEN__) |
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278 /** |
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279 * This is because WebGL 2 derives from OpenGL ES 3.0, which |
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280 * doesn't support GL_CLAMP_TO_BORDER, as can be seen here: |
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281 * https://registry.khronos.org/OpenGL-Refpages/es3.0/html/glTexParameter.xhtml |
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282 **/ |
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283 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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284 "OpenGLTextureArray::SetClampingToZero() is not available in WebGL 2"); |
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285 #else |
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286 ORTHANC_OPENGL_CHECK("Entering OpenGLTexture::SetClampingToZero()"); |
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287 |
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288 glBindTexture(GL_TEXTURE_2D, texture_); |
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289 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER); |
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290 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER); |
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291 |
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292 GLfloat colorfv[4] = { 0, 0, 0, 0 }; |
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293 glTextureParameterfv(texture_, GL_TEXTURE_BORDER_COLOR, colorfv); |
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294 |
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295 ORTHANC_OPENGL_CHECK("Exiting OpenGLTexture::SetClampingToZero()"); |
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296 #endif |
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297 } |
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298 |
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299 |
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300 void OpenGLTexture::ConvertToOpenGLFormats(GLenum& sourceFormat, |
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301 GLenum& internalFormat, |
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302 GLenum& pixelType, |
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303 Orthanc::PixelFormat format) |
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304 { |
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305 switch (format) |
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306 { |
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307 case Orthanc::PixelFormat_Grayscale8: |
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308 sourceFormat = GL_RED; |
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309 internalFormat = GL_RED; |
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310 pixelType = GL_UNSIGNED_BYTE; |
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311 break; |
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312 |
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313 case Orthanc::PixelFormat_RGB24: |
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314 sourceFormat = GL_RGB; |
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315 internalFormat = GL_RGB; |
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316 pixelType = GL_UNSIGNED_BYTE; |
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317 break; |
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318 |
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319 case Orthanc::PixelFormat_RGBA32: |
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320 sourceFormat = GL_RGBA; |
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321 internalFormat = GL_RGBA; |
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322 pixelType = GL_UNSIGNED_BYTE; |
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323 break; |
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324 |
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325 case Orthanc::PixelFormat_Float32: |
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326 sourceFormat = GL_RED; |
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327 internalFormat = GL_R32F; // Don't use "GL_RED" here, as it clamps to [0,1] |
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328 pixelType = GL_FLOAT; |
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329 break; |
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330 |
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331 default: |
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332 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, |
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333 "No support for this format in OpenGL textures: " + |
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334 std::string(EnumerationToString(format))); |
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335 } |
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336 } |
579
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337 } |
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338 } |