Mercurial > hg > orthanc-stone

annotate OrthancStone/Sources/OpenGL/OpenGLShader.cpp @ 1534:0443d04416d9

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don't discard the windowing altered by mouse
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 07 Aug 2020 21:48:43 +0200
parents 244ad1e4e76a
children 85e117739eca
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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) 2017-2020 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 Affero 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 * Affero 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 Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #include "OpenGLShader.h"
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23
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24 #include <OrthancException.h>
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25
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26 namespace OrthancStone
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27 {
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28 namespace OpenGL
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29 {
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30 static GLuint CompileShader(GLenum type,
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31 const std::string& source)
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32 {
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33 // Create shader object
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34 const GLchar* sourceString[1];
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35 GLint sourceStringLengths[1];
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36
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37 sourceString[0] = source.c_str();
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38 sourceStringLengths[0] = static_cast<GLint>(source.length());
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39 GLuint shader = glCreateShader(type);
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40 ORTHANC_OPENGL_CHECK("glCreateShader");
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41
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42 if (shader == 0)
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43 {
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44 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
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45 "Cannot create an OpenGL shader");
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46 }
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47 else
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48 {
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49 // Assign and compile the source to the shader object
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50 glShaderSource(shader, 1, sourceString, sourceStringLengths);
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51 ORTHANC_OPENGL_CHECK("glShaderSource");
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52 glCompileShader(shader);
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53 ORTHANC_OPENGL_CHECK("glCompileShader");
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54
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55 // Check if there were errors
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56 int infoLen = 0;
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57 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
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58 ORTHANC_OPENGL_CHECK("glGetShaderiv");
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59
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60 if (infoLen > 1) // Might be equal to 1, which amounts to no error
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61 {
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62 std::string infoLog;
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63 infoLog.resize(infoLen + 1);
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64 glGetShaderInfoLog(shader, infoLen, NULL, &infoLog[0]);
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65 ORTHANC_OPENGL_CHECK("glGetShaderInfoLog");
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66 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteShader");
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67 glDeleteShader(shader);
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68 ORTHANC_OPENGL_CHECK("glDeleteShader");
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69
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70 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
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71 "Error while creating an OpenGL shader: " + infoLog);
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72 }
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73 else
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74 {
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75 return shader;
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76 }
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77 }
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78 }
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79
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81 OpenGLShader::OpenGLShader(GLenum type,
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82 const std::string& source)
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83 {
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84 shader_ = CompileShader(type, source);
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85 isValid_ = true;
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86 }
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87
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88
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89 OpenGLShader::~OpenGLShader()
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90 {
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91 try
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92 {
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93 if (isValid_)
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94 {
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95 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteShader");
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96 glDeleteShader(shader_);
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97 ORTHANC_OPENGL_CHECK("glDeleteShader");
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98 }
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99 }
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100 catch (const Orthanc::OrthancException& e)
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101 {
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102 if (e.HasDetails())
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103 {
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104 LOG(ERROR) << "OrthancException in ~OpenGLShader: " << e.What() << " Details: " << e.GetDetails();
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105 }
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106 else
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107 {
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108 LOG(ERROR) << "OrthancException in ~OpenGLShader: " << e.What();
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109 }
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110 }
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111 catch (const std::exception& e)
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112 {
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113 LOG(ERROR) << "std::exception in ~OpenGLShader: " << e.what();
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114 }
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115 catch (...)
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116 {
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117 LOG(ERROR) << "Unknown exception in ~OpenGLShader";
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118 }
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119 }
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120
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121 GLuint OpenGLShader::Release()
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122 {
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123 if (isValid_)
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124 {
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125 isValid_ = false;
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126 return shader_;
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127 }
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128 else
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129 {
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130 LOG(ERROR) << "OpenGLShader::Release(): (!isValid_)";
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131 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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132 }
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133 }
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134 }
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135 }