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Fix #312: scaling still wrong

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This commit is contained in:
Paddy Xu
2018-08-30 23:46:25 +03:00
parent 695b42e82b
commit 578c67ef0d
1 changed files with 6 additions and 5 deletions
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11
QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/NativeImageProvider.cs
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@@ -36,10 +36,10 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage
public override Task<BitmapSource> GetThumbnail(Size size, Size fullSize) public override Task<BitmapSource> GetThumbnail(Size size, Size fullSize)
{ {
var decodeWidth = Math.Round(fullSize.Width * var decodeWidth = (int) Math.Round(fullSize.Width *
Math.Min(size.Width / 2 / fullSize.Width, size.Height / 2 / fullSize.Height)); Math.Min(size.Width / 2 / fullSize.Width,
var scale = fullSize.Width / decodeWidth; size.Height / 2 / fullSize.Height));
var decodeHeight = Math.Round(fullSize.Height / scale); var decodeHeight = (int) Math.Round(fullSize.Height / fullSize.Width * decodeWidth);
return new Task<BitmapSource>(() => return new Task<BitmapSource>(() =>
{ {
@@ -54,7 +54,8 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage
(int) decodeHeight; // specific size to avoid .net's double to int conversion (int) decodeHeight; // specific size to avoid .net's double to int conversion
img.EndInit(); img.EndInit();
var scaled = new TransformedBitmap(img, new ScaleTransform(scale, scale)); var scaled = new TransformedBitmap(img,
new ScaleTransform(fullSize.Width / decodeWidth, fullSize.Height / decodeHeight));
scaled.Freeze(); scaled.Freeze();
return scaled; return scaled;
} }