GPUInfos Module::discover() const
{
GPUInfos result;
GPUInfo defaultInfo( "GLX" );
const char* displayEnv = getenv( "DISPLAY" );
if( displayEnv && displayEnv[0] != '\0' )
{
const std::string display( displayEnv );
if( queryDisplay_( display, defaultInfo ))
{
defaultInfo.flags = GPUInfo::FLAG_DEFAULT;
result.push_back( defaultInfo );
#ifdef __APPLE__
// OS X only has one X server, but launchd magic makes duplicate
// detection hard
return result;
#endif
}
}
// try x servers :0 - :n
for( unsigned i = 0; i < std::numeric_limits< unsigned >::max() ; ++i )
// x screens :n.0 - :n.m
for( unsigned j = 0; j < std::numeric_limits< unsigned >::max(); ++j )
{
std::stringstream stream;
stream << ':' << i << '.' << j;
GPUInfo info( "GLX" );
if( queryDisplay_( stream.str(), info ))
{
if( info != defaultInfo )
result.push_back( info );
}
else if( j == 0 && i > TRY_PORTS )
// X Server does not exist, stop query
return result;
else // X Screen does not exist, try next server
break;
}
return result;
}
GPUInfos Module::discover() const
{
GPUInfos result;
GPUInfo defaultInfo( "GLX" );
const char* displayEnv = getenv( "DISPLAY" );
if( displayEnv && displayEnv[0] != '\0' )
{
const std::string display( displayEnv );
if( queryDisplay_( display, defaultInfo ))
{
if( display[0] != ':' && display[0] != '/' /* OS X launchd */ )
{
defaultInfo.port = GPUInfo::defaultValue;
defaultInfo.device = GPUInfo::defaultValue;
}
result.push_back( defaultInfo );
}
}
// try x servers :0 - :n
for( unsigned i = 0; i < std::numeric_limits< unsigned >::max() ; ++i )
// x screens :n.0 - :n.m
for( unsigned j = 0; j < std::numeric_limits< unsigned >::max(); ++j )
{
std::stringstream stream;
stream << ':' << i << '.' << j;
GPUInfo info( "GLX" );
if( queryDisplay_( stream.str(), info ))
{
if( info != defaultInfo )
result.push_back( info );
}
else if( j == 0 && i >= TRY_PORTS )
// X Server does not exist, stop query
return result;
else // X Screen does not exist, try next server
break;
}
return result;
}
