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610 lines
22 KiB
610 lines
22 KiB
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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// working on windows at least
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"cr2"
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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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// test an operation that requires the native library
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SKPMColor.PreMultiply(SKColors.Black);
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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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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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{
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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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}
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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 static string[] TransparentImageTypes = new string[] { ".png", ".gif", ".webp" };
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internal static SKBitmap Decode(string path, bool forceCleanBitmap, out SKCodecOrigin origin)
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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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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 = SKCodecOrigin.TopLeft;
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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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if (bitmap != null)
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{
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// decode
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codec.GetPixels(bitmap.Info, bitmap.GetPixels());
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origin = codec.Origin;
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}
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else
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{
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origin = SKCodecOrigin.TopLeft;
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}
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return bitmap;
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}
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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, 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, out origin);
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}
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}
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origin = SKCodecOrigin.TopLeft;
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return resultBitmap;
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}
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private SKBitmap GetBitmap(string path, bool cropWhitespace, bool forceAnalyzeBitmap, out SKCodecOrigin 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, 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, out origin);
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}
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private SKBitmap GetBitmap(string path, bool cropWhitespace, bool autoOrient)
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{
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SKCodecOrigin origin;
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if (autoOrient)
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{
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var bitmap = GetBitmap(path, cropWhitespace, true, out origin);
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if (bitmap != null)
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{
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if (origin != SKCodecOrigin.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, out origin);
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}
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private SKBitmap OrientImage(SKBitmap bitmap, SKCodecOrigin 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 SKCodecOrigin.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 SKCodecOrigin.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 SKCodecOrigin.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 SKCodecOrigin.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 SKCodecOrigin.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 SKCodecOrigin.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 SKCodecOrigin.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("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, autoOrient))
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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.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) && !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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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)
|
|
{
|
|
new PercentPlayedDrawer().Process(canvas, currentImageSize, options.PercentPlayed);
|
|
}
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.ErrorException("Error drawing indicator overlay", ex);
|
|
}
|
|
}
|
|
|
|
public string Name
|
|
{
|
|
get { return "Skia"; }
|
|
}
|
|
|
|
public bool SupportsImageCollageCreation
|
|
{
|
|
get { return true; }
|
|
}
|
|
|
|
public bool SupportsImageEncoding
|
|
{
|
|
get { return true; }
|
|
}
|
|
}
|
|
} |