658 lines
24 KiB
C#
658 lines
24 KiB
C#
using System;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Reflection;
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Controller.Drawing;
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using MediaBrowser.Controller.Extensions;
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using MediaBrowser.Model.Drawing;
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using MediaBrowser.Model.Globalization;
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using MediaBrowser.Model.IO;
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using Microsoft.Extensions.Logging;
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using SkiaSharp;
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namespace Emby.Drawing
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{
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public class SkiaEncoder : IImageEncoder
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{
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private readonly ILogger _logger;
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private static IApplicationPaths _appPaths;
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private readonly IFileSystem _fileSystem;
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private static ILocalizationManager _localizationManager;
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public SkiaEncoder(
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ILoggerFactory loggerFactory,
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IApplicationPaths appPaths,
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IFileSystem fileSystem,
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ILocalizationManager localizationManager)
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{
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_logger = loggerFactory.CreateLogger("ImageEncoder");
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_appPaths = appPaths;
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_fileSystem = fileSystem;
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_localizationManager = localizationManager;
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LogVersion();
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}
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public string[] SupportedInputFormats =>
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new[]
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{
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"jpeg",
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"jpg",
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"png",
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"dng",
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"webp",
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"gif",
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"bmp",
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"ico",
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"astc",
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"ktx",
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"pkm",
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"wbmp",
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// TODO
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// Are all of these supported? https://github.com/google/skia/blob/master/infra/bots/recipes/test.py#L454
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// working on windows at least
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"cr2",
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"nef",
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"arw"
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};
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public ImageFormat[] SupportedOutputFormats => new[] { ImageFormat.Webp, ImageFormat.Jpg, ImageFormat.Png };
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private void LogVersion()
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{
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// test an operation that requires the native library
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SKPMColor.PreMultiply(SKColors.Black);
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_logger.LogInformation("SkiaSharp version: " + GetVersion());
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}
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public static string GetVersion()
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{
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return typeof(SKBitmap).GetTypeInfo().Assembly.GetName().Version.ToString();
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}
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private static bool IsTransparent(SKColor color)
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{
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return (color.Red == 255 && color.Green == 255 && color.Blue == 255) || color.Alpha == 0;
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}
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public static SKEncodedImageFormat GetImageFormat(ImageFormat selectedFormat)
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{
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switch (selectedFormat)
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{
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case ImageFormat.Bmp:
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return SKEncodedImageFormat.Bmp;
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case ImageFormat.Jpg:
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return SKEncodedImageFormat.Jpeg;
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case ImageFormat.Gif:
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return SKEncodedImageFormat.Gif;
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case ImageFormat.Webp:
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return SKEncodedImageFormat.Webp;
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default:
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return SKEncodedImageFormat.Png;
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}
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}
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private static bool IsTransparentRow(SKBitmap bmp, int row)
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{
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for (var i = 0; i < bmp.Width; ++i)
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{
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if (!IsTransparent(bmp.GetPixel(i, row)))
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{
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return false;
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}
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}
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return true;
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}
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private static bool IsTransparentColumn(SKBitmap bmp, int col)
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{
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for (var i = 0; i < bmp.Height; ++i)
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{
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if (!IsTransparent(bmp.GetPixel(col, i)))
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{
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return false;
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}
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}
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return true;
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}
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private SKBitmap CropWhiteSpace(SKBitmap bitmap)
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{
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var topmost = 0;
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for (int row = 0; row < bitmap.Height; ++row)
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{
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if (IsTransparentRow(bitmap, row))
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topmost = row + 1;
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else break;
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}
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int bottommost = bitmap.Height;
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for (int row = bitmap.Height - 1; row >= 0; --row)
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{
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if (IsTransparentRow(bitmap, row))
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bottommost = row;
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else break;
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}
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int leftmost = 0, rightmost = bitmap.Width;
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for (int col = 0; col < bitmap.Width; ++col)
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{
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if (IsTransparentColumn(bitmap, col))
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leftmost = col + 1;
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else
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break;
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}
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for (int col = bitmap.Width - 1; col >= 0; --col)
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{
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if (IsTransparentColumn(bitmap, col))
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rightmost = col;
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else
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break;
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}
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var newRect = SKRectI.Create(leftmost, topmost, rightmost - leftmost, bottommost - topmost);
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using (var image = SKImage.FromBitmap(bitmap))
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using (var subset = image.Subset(newRect))
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{
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return SKBitmap.FromImage(subset);
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}
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}
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public ImageSize GetImageSize(string path)
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{
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using (var s = new SKFileStream(path))
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using (var codec = SKCodec.Create(s))
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{
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var info = codec.Info;
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return new ImageSize
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{
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Width = info.Width,
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Height = info.Height
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};
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}
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}
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private static bool HasDiacritics(string text)
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{
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return !string.Equals(text, text.RemoveDiacritics(), StringComparison.Ordinal);
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}
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private static bool RequiresSpecialCharacterHack(string path)
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{
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if (_localizationManager.HasUnicodeCategory(path, UnicodeCategory.OtherLetter))
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{
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return true;
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}
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if (HasDiacritics(path))
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{
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return true;
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}
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return false;
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}
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private static string NormalizePath(string path, IFileSystem fileSystem)
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{
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if (!RequiresSpecialCharacterHack(path))
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{
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return path;
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}
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var tempPath = Path.Combine(_appPaths.TempDirectory, Guid.NewGuid() + Path.GetExtension(path) ?? string.Empty);
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fileSystem.CreateDirectory(fileSystem.GetDirectoryName(tempPath));
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fileSystem.CopyFile(path, tempPath, true);
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return tempPath;
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}
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private static SKEncodedOrigin GetSKEncodedOrigin(ImageOrientation? orientation)
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{
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if (!orientation.HasValue)
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{
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return SKEncodedOrigin.TopLeft;
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}
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switch (orientation.Value)
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{
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case ImageOrientation.TopRight:
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return SKEncodedOrigin.TopRight;
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case ImageOrientation.RightTop:
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return SKEncodedOrigin.RightTop;
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case ImageOrientation.RightBottom:
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return SKEncodedOrigin.RightBottom;
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case ImageOrientation.LeftTop:
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return SKEncodedOrigin.LeftTop;
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case ImageOrientation.LeftBottom:
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return SKEncodedOrigin.LeftBottom;
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case ImageOrientation.BottomRight:
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return SKEncodedOrigin.BottomRight;
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case ImageOrientation.BottomLeft:
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return SKEncodedOrigin.BottomLeft;
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default:
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return SKEncodedOrigin.TopLeft;
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}
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}
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private static string[] TransparentImageTypes = new string[] { ".png", ".gif", ".webp" };
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internal static SKBitmap Decode(string path, bool forceCleanBitmap, IFileSystem fileSystem, ImageOrientation? orientation, out SKEncodedOrigin origin)
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{
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if (!fileSystem.FileExists(path))
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{
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throw new FileNotFoundException("File not found", path);
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}
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var requiresTransparencyHack = TransparentImageTypes.Contains(Path.GetExtension(path) ?? string.Empty);
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if (requiresTransparencyHack || forceCleanBitmap)
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{
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using (var stream = new SKFileStream(NormalizePath(path, fileSystem)))
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using (var codec = SKCodec.Create(stream))
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{
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if (codec == null)
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{
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origin = GetSKEncodedOrigin(orientation);
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return null;
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}
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// create the bitmap
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var bitmap = new SKBitmap(codec.Info.Width, codec.Info.Height, !requiresTransparencyHack);
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// decode
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codec.GetPixels(bitmap.Info, bitmap.GetPixels());
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origin = codec.EncodedOrigin;
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return bitmap;
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}
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}
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var resultBitmap = SKBitmap.Decode(NormalizePath(path, fileSystem));
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if (resultBitmap == null)
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{
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return Decode(path, true, fileSystem, orientation, out origin);
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}
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// If we have to resize these they often end up distorted
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if (resultBitmap.ColorType == SKColorType.Gray8)
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{
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using (resultBitmap)
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{
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return Decode(path, true, fileSystem, orientation, out origin);
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}
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}
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origin = SKEncodedOrigin.TopLeft;
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return resultBitmap;
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}
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private SKBitmap GetBitmap(string path, bool cropWhitespace, bool forceAnalyzeBitmap, ImageOrientation? orientation, out SKEncodedOrigin origin)
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{
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if (cropWhitespace)
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{
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using (var bitmap = Decode(path, forceAnalyzeBitmap, _fileSystem, orientation, out origin))
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{
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return CropWhiteSpace(bitmap);
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}
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}
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return Decode(path, forceAnalyzeBitmap, _fileSystem, orientation, out origin);
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}
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private SKBitmap GetBitmap(string path, bool cropWhitespace, bool autoOrient, ImageOrientation? orientation)
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{
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SKEncodedOrigin origin;
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if (autoOrient)
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{
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var bitmap = GetBitmap(path, cropWhitespace, true, orientation, out origin);
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if (bitmap != null)
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{
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if (origin != SKEncodedOrigin.TopLeft)
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{
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using (bitmap)
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{
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return OrientImage(bitmap, origin);
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}
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}
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}
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return bitmap;
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}
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return GetBitmap(path, cropWhitespace, false, orientation, out origin);
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}
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private SKBitmap OrientImage(SKBitmap bitmap, SKEncodedOrigin origin)
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{
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//var transformations = {
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// 2: { rotate: 0, flip: true},
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// 3: { rotate: 180, flip: false},
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// 4: { rotate: 180, flip: true},
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// 5: { rotate: 90, flip: true},
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// 6: { rotate: 90, flip: false},
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// 7: { rotate: 270, flip: true},
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// 8: { rotate: 270, flip: false},
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//}
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switch (origin)
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{
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case SKEncodedOrigin.TopRight:
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{
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var rotated = new SKBitmap(bitmap.Width, bitmap.Height);
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using (var surface = new SKCanvas(rotated))
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{
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surface.Translate(rotated.Width, 0);
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surface.Scale(-1, 1);
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surface.DrawBitmap(bitmap, 0, 0);
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}
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return rotated;
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}
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case SKEncodedOrigin.BottomRight:
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{
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var rotated = new SKBitmap(bitmap.Width, bitmap.Height);
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using (var surface = new SKCanvas(rotated))
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{
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float px = bitmap.Width;
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px /= 2;
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float py = bitmap.Height;
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py /= 2;
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surface.RotateDegrees(180, px, py);
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surface.DrawBitmap(bitmap, 0, 0);
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}
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return rotated;
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}
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case SKEncodedOrigin.BottomLeft:
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{
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var rotated = new SKBitmap(bitmap.Width, bitmap.Height);
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using (var surface = new SKCanvas(rotated))
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{
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float px = bitmap.Width;
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px /= 2;
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float py = bitmap.Height;
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py /= 2;
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surface.Translate(rotated.Width, 0);
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surface.Scale(-1, 1);
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surface.RotateDegrees(180, px, py);
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surface.DrawBitmap(bitmap, 0, 0);
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}
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return rotated;
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}
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case SKEncodedOrigin.LeftTop:
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{
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// TODO: Remove dual canvases, had trouble with flipping
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using (var rotated = new SKBitmap(bitmap.Height, bitmap.Width))
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{
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using (var surface = new SKCanvas(rotated))
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{
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surface.Translate(rotated.Width, 0);
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surface.RotateDegrees(90);
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surface.DrawBitmap(bitmap, 0, 0);
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}
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var flippedBitmap = new SKBitmap(rotated.Width, rotated.Height);
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using (var flippedCanvas = new SKCanvas(flippedBitmap))
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{
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flippedCanvas.Translate(flippedBitmap.Width, 0);
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flippedCanvas.Scale(-1, 1);
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flippedCanvas.DrawBitmap(rotated, 0, 0);
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}
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return flippedBitmap;
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}
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}
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case SKEncodedOrigin.RightTop:
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{
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var rotated = new SKBitmap(bitmap.Height, bitmap.Width);
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using (var surface = new SKCanvas(rotated))
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{
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surface.Translate(rotated.Width, 0);
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surface.RotateDegrees(90);
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surface.DrawBitmap(bitmap, 0, 0);
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}
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return rotated;
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}
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case SKEncodedOrigin.RightBottom:
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{
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// TODO: Remove dual canvases, had trouble with flipping
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using (var rotated = new SKBitmap(bitmap.Height, bitmap.Width))
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{
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using (var surface = new SKCanvas(rotated))
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{
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surface.Translate(0, rotated.Height);
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surface.RotateDegrees(270);
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surface.DrawBitmap(bitmap, 0, 0);
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}
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var flippedBitmap = new SKBitmap(rotated.Width, rotated.Height);
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using (var flippedCanvas = new SKCanvas(flippedBitmap))
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{
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flippedCanvas.Translate(flippedBitmap.Width, 0);
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flippedCanvas.Scale(-1, 1);
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flippedCanvas.DrawBitmap(rotated, 0, 0);
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}
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return flippedBitmap;
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}
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}
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case SKEncodedOrigin.LeftBottom:
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{
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var rotated = new SKBitmap(bitmap.Height, bitmap.Width);
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using (var surface = new SKCanvas(rotated))
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{
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surface.Translate(0, rotated.Height);
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surface.RotateDegrees(270);
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surface.DrawBitmap(bitmap, 0, 0);
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}
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return rotated;
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}
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default:
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return bitmap;
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}
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}
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public string EncodeImage(string inputPath, DateTime dateModified, string outputPath, bool autoOrient, ImageOrientation? orientation, int quality, ImageProcessingOptions options, ImageFormat selectedOutputFormat)
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{
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if (string.IsNullOrWhiteSpace(inputPath))
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{
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throw new ArgumentNullException(nameof(inputPath));
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}
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if (string.IsNullOrWhiteSpace(inputPath))
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{
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throw new ArgumentNullException(nameof(outputPath));
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}
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var skiaOutputFormat = GetImageFormat(selectedOutputFormat);
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var hasBackgroundColor = !string.IsNullOrWhiteSpace(options.BackgroundColor);
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var hasForegroundColor = !string.IsNullOrWhiteSpace(options.ForegroundLayer);
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var blur = options.Blur ?? 0;
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var hasIndicator = options.AddPlayedIndicator || options.UnplayedCount.HasValue || !options.PercentPlayed.Equals(0);
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using (var bitmap = GetBitmap(inputPath, options.CropWhiteSpace, autoOrient, orientation))
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{
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if (bitmap == null)
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{
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throw new ArgumentOutOfRangeException(string.Format("Skia unable to read image {0}", inputPath));
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}
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//_logger.LogInformation("Color type {0}", bitmap.Info.ColorType);
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var originalImageSize = new ImageSize(bitmap.Width, bitmap.Height);
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if (!options.CropWhiteSpace && options.HasDefaultOptions(inputPath, originalImageSize) && !autoOrient)
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{
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// Just spit out the original file if all the options are default
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return inputPath;
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}
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var newImageSize = ImageHelper.GetNewImageSize(options, originalImageSize);
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var width = Convert.ToInt32(Math.Round(newImageSize.Width));
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var height = Convert.ToInt32(Math.Round(newImageSize.Height));
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using (var resizedBitmap = new SKBitmap(width, height))//, bitmap.ColorType, bitmap.AlphaType))
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{
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// scale image
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bitmap.ScalePixels(resizedBitmap, SKFilterQuality.High);
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// If all we're doing is resizing then we can stop now
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if (!hasBackgroundColor && !hasForegroundColor && blur == 0 && !hasIndicator)
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{
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_fileSystem.CreateDirectory(_fileSystem.GetDirectoryName(outputPath));
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using (var outputStream = new SKFileWStream(outputPath))
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{
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using (var pixmap = new SKPixmap(new SKImageInfo(width, height), resizedBitmap.GetPixels()))
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{
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pixmap.Encode(outputStream, skiaOutputFormat, quality);
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return outputPath;
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}
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}
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}
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// create bitmap to use for canvas drawing used to draw into bitmap
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using (var saveBitmap = new SKBitmap(width, height))//, bitmap.ColorType, bitmap.AlphaType))
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using (var canvas = new SKCanvas(saveBitmap))
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{
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// set background color if present
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if (hasBackgroundColor)
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{
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canvas.Clear(SKColor.Parse(options.BackgroundColor));
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}
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// Add blur if option is present
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if (blur > 0)
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{
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// create image from resized bitmap to apply blur
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using (var paint = new SKPaint())
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using (var filter = SKImageFilter.CreateBlur(blur, blur))
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{
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paint.ImageFilter = filter;
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canvas.DrawBitmap(resizedBitmap, SKRect.Create(width, height), paint);
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}
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}
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else
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{
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// draw resized bitmap onto canvas
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canvas.DrawBitmap(resizedBitmap, SKRect.Create(width, height));
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}
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// If foreground layer present then draw
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if (hasForegroundColor)
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{
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if (!double.TryParse(options.ForegroundLayer, out double opacity))
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{
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opacity = .4;
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}
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canvas.DrawColor(new SKColor(0, 0, 0, (byte)((1 - opacity) * 0xFF)), SKBlendMode.SrcOver);
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}
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|
if (hasIndicator)
|
|
{
|
|
DrawIndicator(canvas, width, height, options);
|
|
}
|
|
|
|
_fileSystem.CreateDirectory(_fileSystem.GetDirectoryName(outputPath));
|
|
using (var outputStream = new SKFileWStream(outputPath))
|
|
{
|
|
using (var pixmap = new SKPixmap(new SKImageInfo(width, height), saveBitmap.GetPixels()))
|
|
{
|
|
pixmap.Encode(outputStream, skiaOutputFormat, quality);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return outputPath;
|
|
}
|
|
|
|
public void CreateImageCollage(ImageCollageOptions options)
|
|
{
|
|
double ratio = options.Width;
|
|
ratio /= options.Height;
|
|
|
|
if (ratio >= 1.4)
|
|
{
|
|
new StripCollageBuilder(_appPaths, _fileSystem).BuildThumbCollage(options.InputPaths, options.OutputPath, options.Width, options.Height);
|
|
}
|
|
else if (ratio >= .9)
|
|
{
|
|
new StripCollageBuilder(_appPaths, _fileSystem).BuildSquareCollage(options.InputPaths, options.OutputPath, options.Width, options.Height);
|
|
}
|
|
else
|
|
{
|
|
// @todo create Poster collage capability
|
|
new StripCollageBuilder(_appPaths, _fileSystem).BuildSquareCollage(options.InputPaths, options.OutputPath, options.Width, options.Height);
|
|
}
|
|
}
|
|
|
|
private void DrawIndicator(SKCanvas canvas, int imageWidth, int imageHeight, ImageProcessingOptions options)
|
|
{
|
|
try
|
|
{
|
|
var currentImageSize = new ImageSize(imageWidth, imageHeight);
|
|
|
|
if (options.AddPlayedIndicator)
|
|
{
|
|
PlayedIndicatorDrawer.DrawPlayedIndicator(canvas, currentImageSize);
|
|
}
|
|
else if (options.UnplayedCount.HasValue)
|
|
{
|
|
UnplayedCountIndicator.DrawUnplayedCountIndicator(canvas, currentImageSize, options.UnplayedCount.Value);
|
|
}
|
|
|
|
if (options.PercentPlayed > 0)
|
|
{
|
|
PercentPlayedDrawer.Process(canvas, currentImageSize, options.PercentPlayed);
|
|
}
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.LogError(ex, "Error drawing indicator overlay");
|
|
}
|
|
}
|
|
|
|
public string Name => "Skia";
|
|
|
|
public bool SupportsImageCollageCreation => true;
|
|
|
|
public bool SupportsImageEncoding => true;
|
|
}
|
|
}
|