private static BitmapInterpolationMode ConvertInterpolationMode(Avalonia.Visuals.Media.Imaging.BitmapInterpolationMode interpolationMode)
{
switch (interpolationMode)
{
case Visuals.Media.Imaging.BitmapInterpolationMode.Default:
return(BitmapInterpolationMode.Fant);
case Visuals.Media.Imaging.BitmapInterpolationMode.LowQuality:
return(BitmapInterpolationMode.NearestNeighbor);
case Visuals.Media.Imaging.BitmapInterpolationMode.MediumQuality:
return(BitmapInterpolationMode.Fant);
default:
case Visuals.Media.Imaging.BitmapInterpolationMode.HighQuality:
return(BitmapInterpolationMode.HighQualityCubic);
}
}
private static InterpolationMode GetInterpolationMode(BitmapInterpolationMode interpolationMode)
{
switch (interpolationMode)
{
case BitmapInterpolationMode.LowQuality:
return(InterpolationMode.NearestNeighbor);
case BitmapInterpolationMode.MediumQuality:
return(InterpolationMode.Linear);
case BitmapInterpolationMode.HighQuality:
return(InterpolationMode.HighQualityCubic);
case BitmapInterpolationMode.Default:
return(InterpolationMode.Linear);
default:
throw new ArgumentOutOfRangeException(nameof(interpolationMode), interpolationMode, null);
}
}
public WicBitmapImpl(Stream stream, int decodeSize, bool horizontal, Avalonia.Visuals.Media.Imaging.BitmapInterpolationMode interpolationMode)
{
_decoder = new BitmapDecoder(Direct2D1Platform.ImagingFactory, stream, DecodeOptions.CacheOnLoad);
var frame = _decoder.GetFrame(0);
// now scale that to the size that we want
var realScale = horizontal ? ((double)frame.Size.Height / frame.Size.Width) : ((double)frame.Size.Width / frame.Size.Height);
PixelSize desired;
if (horizontal)
{
desired = new PixelSize(decodeSize, (int)(realScale * decodeSize));
}
else
{
desired = new PixelSize((int)(realScale * decodeSize), decodeSize);
}
if (frame.Size.Width != desired.Width || frame.Size.Height != desired.Height)
{
using (var scaler = new BitmapScaler(Direct2D1Platform.ImagingFactory))
{
scaler.Initialize(frame, desired.Width, desired.Height, ConvertInterpolationMode(interpolationMode));
WicImpl = new Bitmap(Direct2D1Platform.ImagingFactory, scaler, BitmapCreateCacheOption.CacheOnLoad);
}
}
else
{
WicImpl = new Bitmap(Direct2D1Platform.ImagingFactory, frame, BitmapCreateCacheOption.CacheOnLoad);
}
Dpi = new Vector(96, 96);
}
/// <summary>
/// Draws a bitmap image.
/// </summary>
/// <param name="source">The bitmap image.</param>
/// <param name="opacity">The opacity to draw with.</param>
/// <param name="sourceRect">The rect in the image to draw.</param>
/// <param name="destRect">The rect in the output to draw to.</param>
/// <param name="bitmapInterpolationMode">The bitmap interpolation mode.</param>
public void DrawImage(IRef <IBitmapImpl> source, double opacity, Rect sourceRect, Rect destRect, BitmapInterpolationMode bitmapInterpolationMode)
{
using (var d2d = ((BitmapImpl)source.Item).GetDirect2DBitmap(_deviceContext))
{
var interpolationMode = GetInterpolationMode(bitmapInterpolationMode);
_deviceContext.DrawBitmap(
d2d.Value,
destRect.ToSharpDX(),
(float)opacity,
interpolationMode,
sourceRect.ToSharpDX(),
null);
}
}
public WriteableWicBitmapImpl(Stream stream, int decodeSize, bool horizontal,
Avalonia.Visuals.Media.Imaging.BitmapInterpolationMode interpolationMode)
: base(stream, decodeSize, horizontal, interpolationMode)
{
}
