// Dick Hollenbeck's KiROUND R&D

// This provides better project control over rounding to int from double
// than wxRound() did.  This scheme provides better logging in Debug builds
// and it provides for compile time calculation of constants.


#include <stdio.h>
#include <assert.h>
#include <limits.h>

//-----<KiROUND KIT>------------------------------------------------------------

/**
 * KiROUND
 * rounds a floating point number to an int using
 * "round halfway cases away from zero".
 * In Debug build an assert fires if will not fit into an int.
 */

#if defined( DEBUG )

// DEBUG: a macro to capture line and file, then calls this inline

static inline int KiRound( double v, int line, const char* filename )
{
    v = v < 0 ? v - 0.5 : v + 0.5;
    if( v > INT_MAX + 0.5 )
    {
        printf( "%s: in file %s on line %d, val: %.16g too ' > 0 ' for int\n", __FUNCTION__, filename, line, v );
    }
    else if( v < INT_MIN - 0.5 )
    {
        printf( "%s: in file %s on line %d, val: %.16g too ' < 0 ' for int\n", __FUNCTION__, filename, line, v );
    }
    return int( v );
}

#define KiROUND( v )    KiRound( v, __LINE__, __FILE__ )

#else

// RELEASE: a macro so compile can pre-compute constants.

#define KiROUND( v )  int( (v) < 0 ? (v) - 0.5 : (v) + 0.5 )

#endif


//-----</KiROUND KIT>-----------------------------------------------------------

// Only a macro is compile time calculated, an inline function causes a static constructor
// in a situation like this.
// Therefore the Release build is best done with a MACRO not an inline function.
int Computed = KiROUND( 14.3 * 8 );


int main( int argc, char** argv )
{
    for( double d = double(INT_MAX)-1;  d < double(INT_MAX)+8;  d += 2.0 )
    {
        int i = KiROUND( d );

        printf( "t: %d  %.16g\n", i, d );
    }

    return 0;
}

common/common_plotDXF_functions.cpp

@@ -155,8 +155,8 @@ void DXF_PLOTTER::PlotImage( wxImage & aImage, wxPoint aPos, double aScaleFactor
     size.x = aImage.GetWidth();
     size.y = aImage.GetHeight();
 
-    size.x = wxRound( size.x * aScaleFactor );
-    size.y = wxRound( size.y * aScaleFactor );
+    size.x = KiROUND( size.x * aScaleFactor );
+    size.y = KiROUND( size.y * aScaleFactor );
 
     wxPoint start = aPos;
     start.x -= size.x / 2;
@@ -241,7 +241,7 @@ void DXF_PLOTTER::arc( wxPoint centre, int StAngle, int EndAngle, int radius,
         return;
 
     user_to_device_coordinates( centre );
-    radius = wxRound( user_to_device_size( radius ) );
+    radius = KiROUND( user_to_device_size( radius ) );
 
     /* DXF ARC */
     wxString cname = ColorRefs[current_color].m_Name;