diff options
Diffstat (limited to 'Emby.Drawing/ImageProcessor.cs')
| -rw-r--r-- | Emby.Drawing/ImageProcessor.cs | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/Emby.Drawing/ImageProcessor.cs b/Emby.Drawing/ImageProcessor.cs index b9172d2a8..4e62649db 100644 --- a/Emby.Drawing/ImageProcessor.cs +++ b/Emby.Drawing/ImageProcessor.cs @@ -116,7 +116,7 @@ namespace Emby.Drawing => _transparentImageTypes.Contains(Path.GetExtension(path)); /// <inheritdoc /> - public async Task<(string path, string mimeType, DateTime dateModified)> ProcessImage(ImageProcessingOptions options) + public async Task<(string path, string? mimeType, DateTime dateModified)> ProcessImage(ImageProcessingOptions options) { ItemImageInfo originalImage = options.Image; BaseItem item = options.Item; @@ -232,7 +232,7 @@ namespace Emby.Drawing return ImageFormat.Jpg; } - private string GetMimeType(ImageFormat format, string path) + private string? GetMimeType(ImageFormat format, string path) => format switch { ImageFormat.Bmp => MimeTypes.GetMimeType("i.bmp"), @@ -316,6 +316,27 @@ namespace Emby.Drawing => _imageEncoder.GetImageSize(path); /// <inheritdoc /> + public string GetImageBlurHash(string path) + { + var size = GetImageDimensions(path); + if (size.Width <= 0 || size.Height <= 0) + { + return string.Empty; + } + + // We want tiles to be as close to square as possible, and to *mostly* keep under 16 tiles for performance. + // One tile is (width / xComp) x (height / yComp) pixels, which means that ideally yComp = xComp * height / width. + // See more at https://github.com/woltapp/blurhash/#how-do-i-pick-the-number-of-x-and-y-components + float xCompF = MathF.Sqrt(16.0f * size.Width / size.Height); + float yCompF = xCompF * size.Height / size.Width; + + int xComp = Math.Min((int)xCompF + 1, 9); + int yComp = Math.Min((int)yCompF + 1, 9); + + return _imageEncoder.GetImageBlurHash(xComp, yComp, path); + } + + /// <inheritdoc /> public string GetImageCacheTag(BaseItem item, ItemImageInfo image) => (item.Path + image.DateModified.Ticks).GetMD5().ToString("N", CultureInfo.InvariantCulture); |