Developer Documentation
PostProcessorSobelPlugin_qt.cc
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42 /*===========================================================================*\
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44 * $Revision: 18127 $ *
45 * $LastChangedBy: moebius $ *
46 * $Date: 2014-02-05 10:12:54 +0100 (Wed, 05 Feb 2014) $ *
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49 
56 #include "PostProcessorSobelPlugin.hh"
57 
58 #if QT_VERSION >= 0x050000
59  #include <QOpenGLContext>
60 
61 #else
62  #include <QGLFormat>
63 #endif
64 
65 
66 QString PostProcessorSobelPlugin::checkOpenGL() {
67 
68 #if QT_VERSION < 0x050000
69 
70  QGLFormat::OpenGLVersionFlags flags = QGLFormat::openGLVersionFlags();
71  if ( ! flags.testFlag(QGLFormat::OpenGL_Version_3_0) )
72  return QString("Insufficient OpenGL Version! OpenGL 3.0 or higher required");
73 
74  // Check extensions
75  QString glExtensions = QString((const char*)glGetString(GL_EXTENSIONS));
76  QString missing("");
77 
78  return missing;
79 
80 #else
81  QOpenGLContext* context = QOpenGLContext::currentContext();
82  if ( context ) {
83 
84  // Get version and check
85  QSurfaceFormat format = context->format();
86 
87  if ( (format.majorVersion() < 3) ) {
88  return QString("Insufficient OpenGL Version! OpenGL 3.0 or higher required");
89  }
90 
91  // Check extensions
92  QString missing("");
93 
94  return missing;
95 
96  } else {
97  return name() + QString(": No context available");
98  }
99 
100 #endif
101 
102 }
QString name()
Return a name for the plugin.