public WicScaler(WicTransform prev, bool hybrid = false) : base(prev)
{
if (Context.Settings.Width == Context.Width && Context.Settings.Height == Context.Height)
{
return;
}
double rat = Context.Settings.HybridScaleRatio;
if (hybrid && rat == 1d)
{
return;
}
if (Source is IWICBitmapSourceTransform)
{
// null crop to disable IWICBitmapSourceTransform scaling
var clip = AddRef(Wic.CreateBitmapClipper());
clip.Initialize(Source, new WICRect {
X = 0, Y = 0, Width = (int)Context.Width, Height = (int)Context.Height
});
Source = clip;
}
uint ow = hybrid ? (uint)Math.Ceiling(Context.Width / rat) : (uint)Context.Settings.Width;
uint oh = hybrid ? (uint)Math.Ceiling(Context.Height / rat) : (uint)Context.Settings.Height;
var mode = hybrid ? WICBitmapInterpolationMode.WICBitmapInterpolationModeFant :
Context.Settings.Interpolation.WeightingFunction.Support <0.1 ? WICBitmapInterpolationMode.WICBitmapInterpolationModeNearestNeighbor :
Context.Settings.Interpolation.WeightingFunction.Support> 1.0 ? Context.Settings.ScaleRatio < 1.0 ? WICBitmapInterpolationMode.WICBitmapInterpolationModeCubic : WICBitmapInterpolationMode.WICBitmapInterpolationModeHighQualityCubic :
WICBitmapInterpolationMode.WICBitmapInterpolationModeFant;
var scaler = AddRef(Wic.CreateBitmapScaler());
scaler.Initialize(Source, ow, oh, mode);
Source = scaler;
Source.GetSize(out Context.Width, out Context.Height);
if (hybrid)
{
Context.Settings.Crop = new Rectangle(0, 0, (int)Context.Width, (int)Context.Height);
}
}
public WicNativeScaler(WicTransform prev) : base(prev)
{
double rat = Context.Settings.HybridScaleRatio;
if (rat == 1d)
{
return;
}
var trans = Source as IWICBitmapSourceTransform;
if (trans == null)
{
return;
}
uint ow = Context.Width, oh = Context.Height;
uint cw = (uint)Math.Ceiling(ow / rat), ch = (uint)Math.Ceiling(oh / rat);
trans.GetClosestSize(ref cw, ref ch);
if (cw == ow && ch == oh)
{
return;
}
double wrat = (double)ow / cw, hrat = (double)oh / ch;
var crop = Context.Settings.Crop;
Context.Settings.Crop = new Rectangle((int)Math.Floor(crop.X / wrat), (int)Math.Floor(crop.Y / hrat), (int)Math.Ceiling(crop.Width / wrat), (int)Math.Ceiling(crop.Height / hrat));
var scaler = AddRef(Wic.CreateBitmapScaler());
scaler.Initialize(Source, cw, ch, WICBitmapInterpolationMode.WICBitmapInterpolationModeFant);
Source = scaler;
Source.GetSize(out Context.Width, out Context.Height);
}