void GLGraphicsImpl::initOpenGL( GLContext& context ) {
//Is this the first time we've called this function?
//If m_initialized is "false", set it to "true" and continue.
//Otherwise, stop here.
bool expect = false;
if( !m_initialized.compare_exchange_strong( expect, true ) )
return;
//Activate our context temporarily
context.begin();
//Now that a context is loaded we can load extensions
loadOpenGLExtensions();
//Get the version of OpenGL we're using and log it
GLint major, minor;
glGetIntegerv( GL_MAJOR_VERSION, &major );
glGetIntegerv( GL_MINOR_VERSION, &minor );
logInfo( ( boost::format( "OpenGL version is %d.%d." ) % major % minor ).str() );
//Log supported extensions
GLint extensions;
glGetIntegerv( GL_NUM_EXTENSIONS, &extensions );
logInfo( "Supported extensions:" );
for( GLuint i = 0; i < (GLuint)extensions; ++i )
logInfo( (
boost::format( "%4d: %s" ) %
(i+1) %
glGetStringi( GL_EXTENSIONS, i )
).str() );
//Done using it
context.end();
}
SDL_GLContext WindowService::createSDLGLContext() {
SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);
SDL_GLContext context = SDL_GL_CreateContext(m_sdlWindow);
if (context == NULL)
throw new IWindowService::FailedToInitializeWindow();
SDL_GL_SetSwapInterval(1);
loadOpenGLExtensions();
return context;
}
