private void ApplyLetterBoxing(ref MM_RECT win)
{
// avoid fisheye text overhang as 1:1 source when letterboxing applied.
const float aspectRatio = (float)1 / (float)1;
float targetW = Math.Abs((float)(win.Right - win.Left));
float targetH = Math.Abs((float)(win.Bottom - win.Top));
float tempH = targetW / aspectRatio;
if (tempH <= targetH)
{
float deltaH = Math.Abs(tempH - targetH) / 2;
win.Top += (int)deltaH;
win.Bottom -= (int)deltaH;
}
else
{
float tempW = targetH * aspectRatio;
float deltaW = Math.Abs(tempW - targetW) / 2;
win.Left += (int)deltaW;
win.Right -= (int)deltaW;
}
}
public static extern bool GetClientRect([In] IntPtr hWnd, out MM_RECT lpRect);
public static extern bool GetWindowRect([In] IntPtr hWnd, out MM_RECT lpRect);
