public ImageUtility.float3 ComputeAverageSwatchColor( ImageUtility.float2 _TopLeft, ImageUtility.float2 _BottomRight )
{
// Average xyY values in the specified rectangle
int X0 = Math.Max( 0, Math.Min( m_Texture.Width-1, (int) Math.Floor( _TopLeft.x * m_Texture.Width ) ) );
int Y0 = Math.Max( 0, Math.Min( m_Texture.Height-1, (int) Math.Floor( _TopLeft.y * m_Texture.Height ) ) );
int X1 = Math.Min( m_Texture.Width, Math.Max( X0+1, (int) Math.Floor( _BottomRight.x * m_Texture.Width ) ) );
int Y1 = Math.Min( m_Texture.Height, Math.Max( Y0+1, (int) Math.Floor( _BottomRight.y * m_Texture.Height ) ) );
int W = X1 - X0;
int H = Y1 - Y0;
ImageUtility.float4 AverageXYZ = new ImageUtility.float4( 0, 0, 0, 0 );
for ( int Y=Y0; Y < Y1; Y++ )
for ( int X=X0; X < X1; X++ )
{
ImageUtility.float4 XYZ = m_Texture.ContentXYZ[X,Y];
AverageXYZ += XYZ;
}
AverageXYZ = (1.0f / (W*H)) * AverageXYZ;
ImageUtility.float3 xyY = ImageUtility.ColorProfile.XYZ2xyY( (ImageUtility.float3) AverageXYZ );
return xyY;
}
