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annotate OrthancStone/Sources/OpenGL/OpenGLShader.cpp @ 1871:7053b8a0aaec

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upgrade to year 2022
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 11 Jan 2022 11:18:48 +0100
parents 3889ae96d2e9
children c6263f514f54 07964689cb0b
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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 "OpenGLShader.h"
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25
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26 #include <Logging.h>
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27 #include <OrthancException.h>
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28
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29 namespace OrthancStone
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30 {
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31 namespace OpenGL
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32 {
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33 static GLuint CompileShader(GLenum type,
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34 const std::string& source)
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35 {
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36 // Create shader object
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37 const GLchar* sourceString[1];
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38 GLint sourceStringLengths[1];
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39
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40 sourceString[0] = source.c_str();
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41 sourceStringLengths[0] = static_cast<GLint>(source.length());
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42 GLuint shader = glCreateShader(type);
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43 ORTHANC_OPENGL_CHECK("glCreateShader");
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44
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45 if (shader == 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 shader");
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49 }
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50 else
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51 {
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52 // Assign and compile the source to the shader object
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53 glShaderSource(shader, 1, sourceString, sourceStringLengths);
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54 ORTHANC_OPENGL_CHECK("glShaderSource");
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55 glCompileShader(shader);
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56 ORTHANC_OPENGL_CHECK("glCompileShader");
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57
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58 // Check if there were errors
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59 int infoLen = 0;
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60 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
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61 ORTHANC_OPENGL_CHECK("glGetShaderiv");
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62
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63 if (infoLen > 1) // Might be equal to 1, which amounts to no error
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64 {
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65 std::string infoLog;
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66 infoLog.resize(infoLen + 1);
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67 glGetShaderInfoLog(shader, infoLen, NULL, &infoLog[0]);
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68 ORTHANC_OPENGL_CHECK("glGetShaderInfoLog");
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69 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteShader");
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70 glDeleteShader(shader);
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71 ORTHANC_OPENGL_CHECK("glDeleteShader");
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72
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73 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
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74 "Error while creating an OpenGL shader: " + infoLog);
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75 }
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76 else
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77 {
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78 return shader;
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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
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84 OpenGLShader::OpenGLShader(GLenum type,
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85 const std::string& source) :
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86 shader_(CompileShader(type, source))
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87 {
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88 isValid_ = true;
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89 }
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90
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91
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92 OpenGLShader::~OpenGLShader()
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93 {
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94 try
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95 {
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96 if (isValid_)
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97 {
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98 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteShader");
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99 glDeleteShader(shader_);
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100 ORTHANC_OPENGL_CHECK("glDeleteShader");
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101 }
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102 }
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103 catch (const Orthanc::OrthancException& e)
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104 {
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105 if (e.HasDetails())
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106 {
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107 LOG(ERROR) << "OrthancException in ~OpenGLShader: " << e.What() << " Details: " << e.GetDetails();
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108 }
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109 else
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110 {
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111 LOG(ERROR) << "OrthancException in ~OpenGLShader: " << e.What();
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112 }
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113 }
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114 catch (const std::exception& e)
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115 {
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116 LOG(ERROR) << "std::exception in ~OpenGLShader: " << e.what();
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117 }
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118 catch (...)
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119 {
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120 LOG(ERROR) << "Unknown exception in ~OpenGLShader";
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121 }
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122 }
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123
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124 GLuint OpenGLShader::Release()
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125 {
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126 if (isValid_)
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127 {
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128 isValid_ = false;
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129 return shader_;
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130 }
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131 else
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132 {
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133 LOG(ERROR) << "OpenGLShader::Release(): (!isValid_)";
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134 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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135 }
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136 }
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137 }
21fd70df3fc9 starting work on OpenGL
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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