MTA dxCreateRenderTarget memory calc

--[[ function dxRenderTargetCalc( fWidth, fHeight, bAlpha )
    local iPixels = ( fWidth * fHeight );
    return ( bAlpha and ( iPixels * ( 4 + 4 + 4 + 4 ) ) or ( iPixels * ( 2 + 2 + 2 ) ) ) / 1e+6;
end;

print( dxRenderTargetCalc( 1920, 1080, true ) ) -- 33.1776 MiB
--]]

CRenderTarget =
{
    GetWeightFromSize   = function ( this, fWidth, fHeight, bAlpha )
        local iPixels = ( fWidth * fHeight );
        return ( bAlpha and ( iPixels * ( 4 + 4 + 4 + 4 ) ) or ( iPixels * ( 2 + 2 + 2 ) ) ) / 1e+6;
    end;

    GetPixelsFromWeight = function ( this, iMiB, bAlpha )
        local iBytes = iMiB * 1e+6;

        return ( bAlpha and ( iBytes / ( 4 + 4 + 4 + 4 ) ) or ( iBytes / ( 2 + 2 + 2 ) ) );
    end;
};

local iMiB = CRenderTarget:GetWeightFromSize( 1920, 1080, false );

print( 'iMiB: ', iMiB ); -- iMiB: 12.4416

local iPixels = CRenderTarget:GetPixelsFromWeight( iMiB, false );

print( 'iPixels:', iPixels ); -- iPixels: 2073600.0