425 lines
15 KiB
C#
425 lines
15 KiB
C#
using MediaBrowser.Common.Configuration;
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using MediaBrowser.Common.Net;
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using MediaBrowser.Controller.Drawing;
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using MediaBrowser.Model.Drawing;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Logging;
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using SkiaSharp;
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using System;
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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 System.Threading.Tasks;
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namespace Emby.Drawing.Skia
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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 readonly IApplicationPaths _appPaths;
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private readonly Func<IHttpClient> _httpClientFactory;
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private readonly IFileSystem _fileSystem;
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public SkiaEncoder(ILogger logger, IApplicationPaths appPaths, Func<IHttpClient> httpClientFactory, IFileSystem fileSystem)
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{
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_logger = logger;
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_appPaths = appPaths;
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_httpClientFactory = httpClientFactory;
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_fileSystem = fileSystem;
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LogVersion();
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}
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public string[] SupportedInputFormats
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{
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get
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{
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// Some common file name extensions for RAW picture files include: .cr2, .crw, .dng, .nef, .orf, .rw2, .pef, .arw, .sr2, .srf, and .tif.
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return 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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};
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}
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}
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public ImageFormat[] SupportedOutputFormats
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{
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get
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{
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return new[] { ImageFormat.Webp, ImageFormat.Gif, ImageFormat.Jpg, ImageFormat.Png, ImageFormat.Bmp };
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}
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}
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private void LogVersion()
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{
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_logger.Info("SkiaSharp version: " + GetVersion());
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}
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public static string GetVersion()
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{
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using (var bitmap = new SKBitmap())
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{
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return typeof(SKBitmap).GetTypeInfo().Assembly.GetName().Version.ToString();
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}
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}
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private static bool IsWhiteSpace(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 IsAllWhiteRow(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 (!IsWhiteSpace(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 IsAllWhiteColumn(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 (!IsWhiteSpace(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 (IsAllWhiteRow(bitmap, row))
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topmost = row;
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else break;
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}
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int bottommost = 0;
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for (int row = bitmap.Height - 1; row >= 0; --row)
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{
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if (IsAllWhiteRow(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 = 0;
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for (int col = 0; col < bitmap.Width; ++col)
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{
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if (IsAllWhiteColumn(bitmap, col))
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leftmost = col;
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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 (IsAllWhiteColumn(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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{
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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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//using (var data = subset.Encode(StripCollageBuilder.GetEncodedFormat(outputPath), 90))
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//{
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// using (var fileStream = _fileSystem.GetFileStream(outputPath, FileOpenMode.Create, FileAccessMode.Write, FileShareMode.Read))
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// {
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// data.AsStream().CopyTo(fileStream);
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// }
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//}
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}
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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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{
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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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}
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private string[] TransparentImageTypes = new string[] { ".png", ".gif", ".webp" };
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private SKBitmap Decode(string path, bool forceCleanBitmap = false)
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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(path))
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{
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var codec = SKCodec.Create(stream);
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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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return bitmap;
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}
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}
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var resultBitmap = SKBitmap.Decode(path);
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if (resultBitmap == null)
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{
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return Decode(path, true);
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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);
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}
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}
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return resultBitmap;
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}
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private SKBitmap GetBitmap(string path, bool cropWhitespace)
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{
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if (cropWhitespace)
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{
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using (var bitmap = Decode(path))
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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);
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}
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public string EncodeImage(string inputPath, DateTime dateModified, string outputPath, bool autoOrient, 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("inputPath");
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}
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if (string.IsNullOrWhiteSpace(inputPath))
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{
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throw new ArgumentNullException("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))
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{
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if (bitmap == null)
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{
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throw new Exception(string.Format("Skia unable to read image {0}", inputPath));
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}
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//_logger.Info("Color type {0}", bitmap.Info.ColorType);
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var originalImageSize = new ImageSize(bitmap.Width, bitmap.Height);
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ImageHelper.SaveImageSize(inputPath, dateModified, originalImageSize);
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if (!options.CropWhiteSpace && options.HasDefaultOptions(inputPath, originalImageSize))
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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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var resizeMethod = SKBitmapResizeMethod.Lanczos3;
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bitmap.Resize(resizedBitmap, resizeMethod);
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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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using (var outputStream = new SKFileWStream(outputPath))
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{
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resizedBitmap.Encode(outputStream, skiaOutputFormat, quality);
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return outputPath;
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}
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}
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// create bitmap to use for canvas drawing
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using (var saveBitmap = new SKBitmap(width, height))//, bitmap.ColorType, bitmap.AlphaType))
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{
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// create canvas used to draw into bitmap
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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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using (var paint = new SKPaint())
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{
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// create image from resized bitmap to apply blur
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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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}
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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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Double opacity;
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if (!Double.TryParse(options.ForegroundLayer, out opacity)) opacity = .4;
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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)
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{
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DrawIndicator(canvas, width, height, options);
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}
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using (var outputStream = new SKFileWStream(outputPath))
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{
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saveBitmap.Encode(outputStream, skiaOutputFormat, quality);
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}
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}
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}
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}
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}
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return outputPath;
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}
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public void CreateImageCollage(ImageCollageOptions options)
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{
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double ratio = options.Width;
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ratio /= options.Height;
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if (ratio >= 1.4)
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{
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new StripCollageBuilder(_appPaths, _fileSystem).BuildThumbCollage(options.InputPaths, options.OutputPath, options.Width, options.Height);
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}
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else if (ratio >= .9)
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{
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new StripCollageBuilder(_appPaths, _fileSystem).BuildSquareCollage(options.InputPaths, options.OutputPath, options.Width, options.Height);
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}
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else
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{
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// @todo create Poster collage capability
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new StripCollageBuilder(_appPaths, _fileSystem).BuildSquareCollage(options.InputPaths, options.OutputPath, options.Width, options.Height);
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}
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}
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private void DrawIndicator(SKCanvas canvas, int imageWidth, int imageHeight, ImageProcessingOptions options)
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{
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try
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{
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var currentImageSize = new ImageSize(imageWidth, imageHeight);
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if (options.AddPlayedIndicator)
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{
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var task = new PlayedIndicatorDrawer(_appPaths, _httpClientFactory(), _fileSystem).DrawPlayedIndicator(canvas, currentImageSize);
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Task.WaitAll(task);
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}
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else if (options.UnplayedCount.HasValue)
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{
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new UnplayedCountIndicator(_appPaths, _httpClientFactory(), _fileSystem).DrawUnplayedCountIndicator(canvas, currentImageSize, options.UnplayedCount.Value);
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}
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if (options.PercentPlayed > 0)
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{
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new PercentPlayedDrawer().Process(canvas, currentImageSize, options.PercentPlayed);
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}
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error drawing indicator overlay", ex);
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}
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}
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public string Name
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{
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get { return "Skia"; }
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}
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public void Dispose()
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{
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}
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public bool SupportsImageCollageCreation
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{
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get { return true; }
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}
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public bool SupportsImageEncoding
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{
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get { return true; }
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}
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}
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} |