MRProgressCallback.h

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#pragma once
 
#include "MRMeshFwd.h"
 
#include <cassert>
 
namespace MR
{
 
inline bool reportProgress( ProgressCallback cb, float v )
{
    if ( cb )
        return cb( v );
    return true;
}
 
inline bool reportProgress( ProgressCallback cb, float v, size_t counter, int divider )
{
    if ( cb && ( counter % divider == 0 ) )
        return cb( v );
    return true;
}
 
template<typename F>
inline bool reportProgress( ProgressCallback cb, F && f )
{
    if ( cb )
        return cb( f() );
    return true;
}
 
template<typename F>
inline bool reportProgress( ProgressCallback cb, F && f, size_t counter, int divider )
{
    if ( cb && ( counter % divider == 0 ) )
        return cb( f() );
    return true;
}
 
inline ProgressCallback subprogress( ProgressCallback cb, float from, float to )
{
    ProgressCallback res;
    if ( cb )
        res = [cb, from, to]( float v ) { return cb( ( 1 - v ) * from + v * to ); };
    return res;
}
 
template<typename F>
inline ProgressCallback subprogress( ProgressCallback cb, F && f )
{
    ProgressCallback res;
    if ( cb )
        res = [cb, f = std::forward<F>( f )]( float v ) { return cb( f( v ) ); };
    return res;
}
 
inline ProgressCallback subprogress( ProgressCallback cb, size_t index, size_t count )
{
    assert( index < count );
    if ( cb )
        return [cb, index, count] ( float v ) { return cb( ( (float)index + v ) / (float)count ); };
    else
        return {};
}
 
} //namespace MR