Mercurial > hg > orthanc-stone

annotate OrthancStone/Sources/OpenGL/OpenGLShader.cpp @ 1739:9ac2a65d4172

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upgrade to year 2021
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 06 Jan 2021 17:50:00 +0100
parents 59f95b9ea858
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
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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
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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,
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84 const std::string& source) :
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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 }