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annotate OrthancStone/Sources/OpenGL/OpenGLShader.cpp @ 1853:cbb5c4a66160
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 29 Jun 2021 16:29:37 +0200 |
parents | 9ac2a65d4172 |
children | 3889ae96d2e9 |
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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) 2017-2021 Osimis S.A., Belgium |
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6 * |
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7 * This program is free software: you can redistribute it and/or |
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8 * modify it under the terms of the GNU Lesser General Public License |
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9 * as published by the Free Software Foundation, either version 3 of |
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10 * the License, or (at your option) any later version. |
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11 * |
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12 * This program is distributed in the hope that it will be useful, but |
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Lesser General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
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20 **/ |
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21 |
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22 |
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23 #include "OpenGLShader.h" |
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24 |
1624 | 25 #include <Logging.h> |
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26 #include <OrthancException.h> |
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27 |
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28 namespace OrthancStone |
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29 { |
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30 namespace OpenGL |
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31 { |
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32 static GLuint CompileShader(GLenum type, |
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33 const std::string& source) |
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34 { |
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35 // Create shader object |
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36 const GLchar* sourceString[1]; |
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37 GLint sourceStringLengths[1]; |
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38 |
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39 sourceString[0] = source.c_str(); |
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40 sourceStringLengths[0] = static_cast<GLint>(source.length()); |
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41 GLuint shader = glCreateShader(type); |
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42 ORTHANC_OPENGL_CHECK("glCreateShader"); |
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43 |
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44 if (shader == 0) |
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45 { |
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46 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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47 "Cannot create an OpenGL shader"); |
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48 } |
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49 else |
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50 { |
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51 // Assign and compile the source to the shader object |
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52 glShaderSource(shader, 1, sourceString, sourceStringLengths); |
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53 ORTHANC_OPENGL_CHECK("glShaderSource"); |
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54 glCompileShader(shader); |
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55 ORTHANC_OPENGL_CHECK("glCompileShader"); |
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56 |
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57 // Check if there were errors |
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58 int infoLen = 0; |
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59 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen); |
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60 ORTHANC_OPENGL_CHECK("glGetShaderiv"); |
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61 |
599 | 62 if (infoLen > 1) // Might be equal to 1, which amounts to no error |
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63 { |
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64 std::string infoLog; |
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65 infoLog.resize(infoLen + 1); |
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66 glGetShaderInfoLog(shader, infoLen, NULL, &infoLog[0]); |
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67 ORTHANC_OPENGL_CHECK("glGetShaderInfoLog"); |
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68 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteShader"); |
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69 glDeleteShader(shader); |
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70 ORTHANC_OPENGL_CHECK("glDeleteShader"); |
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71 |
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72 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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73 "Error while creating an OpenGL shader: " + infoLog); |
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74 } |
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75 else |
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76 { |
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77 return shader; |
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78 } |
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79 } |
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80 } |
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81 |
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82 |
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83 OpenGLShader::OpenGLShader(GLenum type, |
1571 | 84 const std::string& source) : |
85 shader_(CompileShader(type, source)) | |
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86 { |
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87 isValid_ = true; |
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88 } |
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89 |
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90 |
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91 OpenGLShader::~OpenGLShader() |
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92 { |
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93 try |
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94 { |
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95 if (isValid_) |
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96 { |
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97 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteShader"); |
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98 glDeleteShader(shader_); |
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99 ORTHANC_OPENGL_CHECK("glDeleteShader"); |
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100 } |
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101 } |
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102 catch (const Orthanc::OrthancException& e) |
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103 { |
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104 if (e.HasDetails()) |
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105 { |
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106 LOG(ERROR) << "OrthancException in ~OpenGLShader: " << e.What() << " Details: " << e.GetDetails(); |
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107 } |
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108 else |
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109 { |
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110 LOG(ERROR) << "OrthancException in ~OpenGLShader: " << e.What(); |
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111 } |
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112 } |
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113 catch (const std::exception& e) |
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114 { |
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115 LOG(ERROR) << "std::exception in ~OpenGLShader: " << e.what(); |
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116 } |
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117 catch (...) |
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118 { |
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119 LOG(ERROR) << "Unknown exception in ~OpenGLShader"; |
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120 } |
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121 } |
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122 |
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123 GLuint OpenGLShader::Release() |
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124 { |
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125 if (isValid_) |
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126 { |
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127 isValid_ = false; |
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128 return shader_; |
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129 } |
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130 else |
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131 { |
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132 LOG(ERROR) << "OpenGLShader::Release(): (!isValid_)"; |
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133 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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134 } |
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135 } |
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136 } |
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137 } |