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annotate OrthancStone/Sources/OpenGL/OpenGLProgram.cpp @ 1830:fa38043b14b0

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 29 May 2021 11:14:20 +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 "OpenGLProgram.h"
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24
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25 #include "OpenGLShader.h"
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26 #include "IOpenGLContext.h"
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27
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28 #include <Logging.h>
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29 #include <OrthancException.h>
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30
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31 #include <cassert>
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32
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33 namespace OrthancStone
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34 {
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35 namespace OpenGL
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36 {
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37 OpenGLProgram::OpenGLProgram(OpenGL::IOpenGLContext& context) :
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38 context_(context),
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39 program_(glCreateProgram())
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40 {
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41 ORTHANC_OPENGL_CHECK("glCreateProgram");
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42
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43 if (program_ == 0)
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44 {
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45 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
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46 "Cannot create an OpenGL program");
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47 }
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48 }
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49
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50
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51 OpenGLProgram::~OpenGLProgram()
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52 {
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53 try
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54 {
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55 if (!context_.IsContextLost())
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56 {
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57 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteProgram");
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58 assert(program_ != 0);
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59 glDeleteProgram(program_);
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60 ORTHANC_OPENGL_CHECK("glDeleteProgram");
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61 }
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62 }
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63 catch (const Orthanc::OrthancException& e)
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64 {
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65 if (e.HasDetails())
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66 {
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67 LOG(ERROR) << "OrthancException in ~OpenGLProgram: " << e.What() << " Details: " << e.GetDetails();
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68 }
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69 else
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70 {
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71 LOG(ERROR) << "OrthancException in ~OpenGLProgram: " << e.What();
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72 }
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73 }
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74 catch (const std::exception& e)
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75 {
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76 LOG(ERROR) << "std::exception in ~OpenGLProgram: " << e.what();
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77 }
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78 catch (...)
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79 {
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80 LOG(ERROR) << "Unknown exception in ~OpenGLProgram";
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81 }
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82 }
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83
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84 void OpenGLProgram::Use()
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85 {
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86 //ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glUseProgram");
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87 glUseProgram(program_);
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88 ORTHANC_OPENGL_CHECK("glUseProgram");
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89 }
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90
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91 void OpenGLProgram::CompileShaders(const std::string& vertexCode,
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92 const std::string& fragmentCode)
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93 {
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94 assert(program_ != 0);
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95
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96 OpenGLShader vertexShader(GL_VERTEX_SHADER, vertexCode);
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97 OpenGLShader fragmentShader(GL_FRAGMENT_SHADER, fragmentCode);
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98
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99 glAttachShader(program_, vertexShader.Release());
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100 ORTHANC_OPENGL_CHECK("glAttachShader");
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101 glAttachShader(program_, fragmentShader.Release());
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102 ORTHANC_OPENGL_CHECK("glAttachShader");
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103 glLinkProgram(program_);
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104 ORTHANC_OPENGL_CHECK("glLinkProgram");
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105 glValidateProgram(program_);
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106 ORTHANC_OPENGL_CHECK("glValidateProgram");
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107 }
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108
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109 GLint OpenGLProgram::GetUniformLocation(const std::string& name)
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110 {
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111 GLint location = glGetUniformLocation(program_, name.c_str());
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112 ORTHANC_OPENGL_CHECK("glGetUniformLocation");
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113
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114 if (location == -1)
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115 {
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116 throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentItem,
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117 "Inexistent uniform variable in shader: " + name);
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118 }
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119 else
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120 {
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121 return location;
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122 }
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123 }
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124
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125
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126 GLint OpenGLProgram::GetAttributeLocation(const std::string& name)
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127 {
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128 GLint location = glGetAttribLocation(program_, name.c_str());
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129 ORTHANC_OPENGL_CHECK("glGetAttribLocation");
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130
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131 if (location == -1)
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132 {
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133 throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentItem,
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134 "Inexistent attribute in shader: " + name);
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135 }
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
136 else
fadacfbf5538 OpenGL programs and textures
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
137 {
fadacfbf5538 OpenGL programs and textures
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
138 return location;
fadacfbf5538 OpenGL programs and textures
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
139 }
fadacfbf5538 OpenGL programs and textures
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
140 }
fadacfbf5538 OpenGL programs and textures
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
141 }
fadacfbf5538 OpenGL programs and textures
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
142 }