public void Scale(int?width, int?height, WICBitmapInterpolationMode mode = WICBitmapInterpolationMode.WICBitmapInterpolationModeNearestNeighbor, WicBitmapScaleOptions options = WicBitmapScaleOptions.Default)
{
if (!width.HasValue && !height.HasValue)
{
return;
}
if (width.HasValue && width.Value <= 0)
{
throw new ArgumentOutOfRangeException(nameof(width));
}
if (height.HasValue && height.Value <= 0)
{
throw new ArgumentOutOfRangeException(nameof(height));
}
int neww;
int newh;
if (width.HasValue && height.HasValue)
{
neww = width.Value;
newh = height.Value;
}
else
{
int w = Width;
int h = Height;
if (w == 0 || h == 0)
{
return;
}
if (width.HasValue)
{
if ((options & WicBitmapScaleOptions.DownOnly) == WicBitmapScaleOptions.DownOnly)
{
if (width.Value > w)
{
return;
}
}
neww = width.Value;
newh = width.Value * h / w;
}
else // height.HasValue
{
if ((options & WicBitmapScaleOptions.DownOnly) == WicBitmapScaleOptions.DownOnly)
{
if (height.Value > h)
{
return;
}
}
newh = height.Value;
neww = height.Value * w / h;
}
}
if (neww == 0 || newh == 0)
{
return;
}
var clip = WICImagingFactory.CreateBitmapScaler();
clip.Object.Initialize(_comObject.Object, neww, newh, mode).ThrowOnError();
_comObject?.Dispose();
_comObject = clip;
}
public void Scale(int boxSize, WICBitmapInterpolationMode mode = WICBitmapInterpolationMode.WICBitmapInterpolationModeNearestNeighbor, WicBitmapScaleOptions options = WicBitmapScaleOptions.Default)
{
if (boxSize <= 0)
{
throw new ArgumentOutOfRangeException(nameof(boxSize));
}
if (Width > Height)
{
Scale(boxSize, null, mode, options);
return;
}
Scale(null, boxSize, mode, options);
}
