Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/OpenGL/OpenGLFramebuffer.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 |
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children | 4e31d76c7ecd |
rev | line source |
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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 "OpenGLFramebuffer.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 "OpenGLTexture.h" |
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33 #include "OpenGLTextureArray.h" |
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34 |
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35 #include <OrthancException.h> |
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36 |
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37 |
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38 namespace OrthancStone |
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39 { |
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40 namespace OpenGL |
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41 { |
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42 void OpenGLFramebuffer::SetupTextureTarget() |
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43 { |
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44 GLenum drawBuffers[1] = { GL_COLOR_ATTACHMENT0 }; |
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45 glDrawBuffers(1, drawBuffers); |
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46 |
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47 if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) |
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48 { |
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49 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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50 "Incomplete setup of an OpenGL framebuffer"); |
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51 } |
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52 } |
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53 |
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54 |
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55 void OpenGLFramebuffer::ReadContent(Orthanc::ImageAccessor& target) |
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56 { |
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57 if (target.GetPitch() != target.GetWidth() * Orthanc::GetBytesPerPixel(target.GetFormat()) || |
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58 target.GetBuffer() == NULL) |
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59 { |
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60 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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61 "Image must have minimal pitch"); |
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62 } |
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63 |
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64 if (glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE) |
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65 { |
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66 ORTHANC_OPENGL_CHECK("glCheckFramebufferStatus()"); |
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67 |
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68 glViewport(0, 0, target.GetWidth(), target.GetHeight()); |
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69 |
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70 GLenum sourceFormat, internalFormat, pixelType; |
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71 OpenGLTexture::ConvertToOpenGLFormats(sourceFormat, internalFormat, pixelType, target.GetFormat()); |
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72 |
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73 #if defined(__EMSCRIPTEN__) && (ORTHANC_WEBGL2_HEAP_COMPAT == 1) |
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74 // Check out "OpenGLTexture.cpp" for an explanation |
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75 |
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76 int framebufferFormat, framebufferType; |
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77 glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_FORMAT, &framebufferFormat); |
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78 glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_TYPE, &framebufferType); |
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79 |
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80 switch (target.GetFormat()) |
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81 { |
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82 case Orthanc::PixelFormat_RGBA32: |
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83 if (sourceFormat != GL_RGBA || |
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84 internalFormat != GL_RGBA || |
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85 pixelType != GL_UNSIGNED_BYTE || |
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86 framebufferFormat != GL_RGBA || |
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87 framebufferType != GL_UNSIGNED_BYTE) |
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88 { |
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89 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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90 } |
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91 |
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92 EM_ASM({ |
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93 var ptr = emscriptenWebGLGetTexPixelData(GLctx.UNSIGNED_BYTE, GLctx.RGBA, $1, $2, $0, GLctx.RGBA); |
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94 GLctx.readPixels(0, 0, $1, $2, GLctx.RGBA, GLctx.UNSIGNED_BYTE, ptr); |
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95 }, |
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96 target.GetBuffer(), // $0 |
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97 target.GetWidth(), // $1 |
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98 target.GetHeight()); // $2 |
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99 break; |
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100 |
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101 case Orthanc::PixelFormat_Float32: |
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102 // In Mozilla Firefox, "Float32" is not available as such. We |
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103 // have to download an RGBA image in Float32. |
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104 if (sourceFormat != GL_RED || |
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105 internalFormat != GL_R32F || |
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106 pixelType != GL_FLOAT || |
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107 framebufferType != GL_FLOAT) |
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108 { |
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109 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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110 } |
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111 |
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112 switch (framebufferFormat) |
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113 { |
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114 case GL_RGBA: |
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115 // This is Mozilla Firefox |
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116 EM_ASM({ |
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117 var tmp = new Float32Array($1 * $2 * 4); |
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118 GLctx.readPixels(0, 0, $1, $2, GLctx.RGBA, GLctx.FLOAT, tmp); |
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119 |
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120 // From RGBA to RED |
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121 var ptr = emscriptenWebGLGetTexPixelData(GLctx.FLOAT, GLctx.RED, $1, $2, $0, GLctx.R32F); |
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122 for (var i = 0; i < $1 * $2; i++) { |
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123 ptr[i] = tmp[4 * i]; |
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124 } |
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125 }, |
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126 target.GetBuffer(), // $0 |
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127 target.GetWidth(), // $1 |
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128 target.GetHeight()); // $2 |
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129 break; |
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130 |
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131 case GL_RED: |
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132 // This is Chromium |
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133 EM_ASM({ |
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134 var ptr = emscriptenWebGLGetTexPixelData(GLctx.FLOAT, GLctx.RED, $1, $2, $0, GLctx.R32F); |
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135 GLctx.readPixels(0, 0, $1, $2, GLctx.RED, GLctx.FLOAT, ptr); |
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136 }, |
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137 target.GetBuffer(), // $0 |
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138 target.GetWidth(), // $1 |
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139 target.GetHeight()); // $2 |
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140 break; |
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141 |
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142 default: |
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143 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); |
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144 } |
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145 break; |
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146 |
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147 default: |
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148 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); |
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149 } |
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150 #else |
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151 glReadPixels(0, 0, target.GetWidth(), target.GetHeight(), sourceFormat, pixelType, target.GetBuffer()); |
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152 #endif |
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153 |
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154 ORTHANC_OPENGL_CHECK("glReadPixels()"); |
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155 } |
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156 else |
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157 { |
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158 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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159 "Incomplete setup of an OpenGL framebuffer"); |
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160 } |
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161 } |
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162 |
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163 |
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164 OpenGLFramebuffer::OpenGLFramebuffer(IOpenGLContext& context) : |
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165 context_(context), |
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166 framebuffer_(0) |
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167 { |
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168 if (context.IsContextLost()) |
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169 { |
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170 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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171 "OpenGL context has been lost"); |
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172 } |
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173 |
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174 glGenFramebuffers(1, &framebuffer_); |
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175 if (framebuffer_ == 0) |
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176 { |
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177 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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178 "Cannot create an OpenGL framebuffer"); |
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179 } |
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180 |
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181 glBindFramebuffer(GL_FRAMEBUFFER, framebuffer_); |
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182 } |
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183 |
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184 |
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185 OpenGLFramebuffer::~OpenGLFramebuffer() |
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186 { |
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187 glDeleteFramebuffers(1, &framebuffer_); |
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188 } |
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189 |
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190 |
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191 void OpenGLFramebuffer::SetTarget(OpenGLTexture& target) |
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192 { |
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193 glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, target.GetId(), 0); |
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194 SetupTextureTarget(); |
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195 glViewport(0, 0, target.GetWidth(), target.GetHeight()); |
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196 } |
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197 |
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198 |
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199 void OpenGLFramebuffer::SetTarget(OpenGLTextureArray& target, |
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|
200 unsigned int layer) |
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201 { |
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202 if (layer >= target.GetDepth()) |
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203 { |
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204 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); |
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205 } |
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206 else |
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207 { |
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208 glFramebufferTextureLayer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, target.GetId(), 0, layer); |
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209 SetupTextureTarget(); |
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210 glViewport(0, 0, target.GetWidth(), target.GetHeight()); |
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211 } |
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212 } |
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213 |
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214 |
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215 void OpenGLFramebuffer::ReadTexture(Orthanc::ImageAccessor& target, |
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216 const OpenGLTexture& source) |
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217 { |
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218 if (target.GetWidth() != source.GetWidth() || |
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219 target.GetHeight() != source.GetHeight()) |
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220 { |
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221 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageSize); |
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222 } |
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223 else if (target.GetFormat() != source.GetFormat()) |
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224 { |
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Sebastien Jodogne <s.jodogne@gmail.com>
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225 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); |
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226 } |
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227 else |
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228 { |
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229 glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, source.GetId(), 0); |
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230 ORTHANC_OPENGL_CHECK("glFramebufferTexture2D()"); |
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231 ReadContent(target); |
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232 } |
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233 } |
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234 |
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235 |
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236 void OpenGLFramebuffer::ReadTexture(Orthanc::ImageAccessor& target, |
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237 const OpenGLTextureArray& source, |
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238 unsigned int layer) |
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239 { |
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240 if (target.GetWidth() != source.GetWidth() || |
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241 target.GetHeight() != source.GetHeight()) |
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242 { |
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243 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageSize); |
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244 } |
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245 else if (target.GetFormat() != source.GetFormat()) |
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246 { |
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247 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); |
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248 } |
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249 else if (layer >= source.GetDepth()) |
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250 { |
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251 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); |
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252 } |
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253 else |
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254 { |
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255 glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, source.GetId(), 0, layer); |
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256 ORTHANC_OPENGL_CHECK("glFramebufferTextureLayer()"); |
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257 ReadContent(target); |
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258 } |
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259 } |
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260 } |
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261 } |