mirror of
https://github.com/jellyfin/jellyfin.git
synced 2024-09-08 20:38:24 +02:00
680 lines
24 KiB
C#
680 lines
24 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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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 Microsoft.Extensions.Logging;
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using SkiaSharp;
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using static Jellyfin.Drawing.Skia.SkiaHelper;
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namespace Jellyfin.Drawing.Skia
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{
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/// <summary>
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/// Image encoder that uses <see cref="SkiaSharp"/> to manipulate images.
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/// </summary>
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public class SkiaEncoder : IImageEncoder
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{
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private static readonly HashSet<string> _transparentImageTypes
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= new HashSet<string>(StringComparer.OrdinalIgnoreCase) { ".png", ".gif", ".webp" };
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private readonly ILogger _logger;
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private readonly IApplicationPaths _appPaths;
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/// <summary>
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/// Initializes a new instance of the <see cref="SkiaEncoder"/> class.
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/// </summary>
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/// <param name="logger">The application logger.</param>
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/// <param name="appPaths">The application paths.</param>
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public SkiaEncoder(
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ILogger<SkiaEncoder> logger,
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IApplicationPaths appPaths)
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{
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_logger = logger;
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_appPaths = appPaths;
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}
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/// <inheritdoc/>
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public string Name => "Skia";
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/// <inheritdoc/>
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public bool SupportsImageCollageCreation => true;
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/// <inheritdoc/>
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public bool SupportsImageEncoding => true;
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/// <inheritdoc/>
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public IReadOnlyCollection<string> SupportedInputFormats =>
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new HashSet<string>(StringComparer.OrdinalIgnoreCase)
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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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/// <inheritdoc/>
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public IReadOnlyCollection<ImageFormat> SupportedOutputFormats
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=> new HashSet<ImageFormat>() { ImageFormat.Webp, ImageFormat.Jpg, ImageFormat.Png };
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/// <summary>
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/// Test to determine if the native lib is available.
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/// </summary>
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public static void TestSkia()
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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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}
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private static bool IsTransparent(SKColor color)
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=> (color.Red == 255 && color.Green == 255 && color.Blue == 255) || color.Alpha == 0;
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/// <summary>
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/// Convert a <see cref="ImageFormat"/> to a <see cref="SKEncodedImageFormat"/>.
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/// </summary>
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/// <param name="selectedFormat">The format to convert.</param>
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/// <returns>The converted format.</returns>
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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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{
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topmost = row + 1;
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}
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else
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{
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break;
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}
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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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{
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bottommost = row;
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}
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else
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{
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break;
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}
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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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{
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leftmost = col + 1;
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}
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else
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{
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break;
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}
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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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{
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rightmost = col;
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}
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else
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{
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break;
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}
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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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/// <inheritdoc />
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/// <exception cref="ArgumentNullException">The path is null.</exception>
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/// <exception cref="FileNotFoundException">The path is not valid.</exception>
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/// <exception cref="SkiaCodecException">The file at the specified path could not be used to generate a codec.</exception>
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public ImageDimensions GetImageSize(string path)
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{
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if (path == null)
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{
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throw new ArgumentNullException(nameof(path));
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}
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if (!File.Exists(path))
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{
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throw new FileNotFoundException("File not found", path);
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}
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using (var codec = SKCodec.Create(path, out SKCodecResult result))
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{
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EnsureSuccess(result);
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var info = codec.Info;
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return new ImageDimensions(info.Width, info.Height);
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}
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}
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private static bool HasDiacritics(string text)
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=> !string.Equals(text, text.RemoveDiacritics(), StringComparison.Ordinal);
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private bool RequiresSpecialCharacterHack(string path)
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{
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for (int i = 0; i < path.Length; i++)
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{
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if (char.GetUnicodeCategory(path[i]) == UnicodeCategory.OtherLetter)
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{
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return true;
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}
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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 string NormalizePath(string path)
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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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Directory.CreateDirectory(Path.GetDirectoryName(tempPath));
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File.Copy(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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/// <summary>
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/// Decode an image.
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/// </summary>
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/// <param name="path">The filepath of the image to decode.</param>
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/// <param name="forceCleanBitmap">Whether to force clean the bitmap.</param>
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/// <param name="orientation">The orientation of the image.</param>
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/// <param name="origin">The detected origin of the image.</param>
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/// <returns>The resulting bitmap of the image.</returns>
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internal SKBitmap Decode(string path, bool forceCleanBitmap, ImageOrientation? orientation, out SKEncodedOrigin origin)
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{
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if (!File.Exists(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));
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if (requiresTransparencyHack || forceCleanBitmap)
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{
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using (var codec = SKCodec.Create(NormalizePath(path)))
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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));
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if (resultBitmap == null)
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{
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return Decode(path, true, 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, 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, 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, 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 && 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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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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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 = (float)bitmap.Width / 2;
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float py = (float)bitmap.Height / 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 = (float)bitmap.Width / 2;
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float py = (float)bitmap.Height / 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: return bitmap;
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}
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}
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/// <inheritdoc/>
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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($"Skia unable to read image {inputPath}");
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}
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var originalImageSize = new ImageDimensions(bitmap.Width, bitmap.Height);
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if (!options.CropWhiteSpace
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&& options.HasDefaultOptions(inputPath, originalImageSize)
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&& !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 = newImageSize.Width;
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var height = 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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Directory.CreateDirectory(Path.GetDirectoryName(outputPath));
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using (var outputStream = new SKFileWStream(outputPath))
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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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// 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)
|
|
{
|
|
canvas.Clear(SKColor.Parse(options.BackgroundColor));
|
|
}
|
|
|
|
// Add blur if option is present
|
|
if (blur > 0)
|
|
{
|
|
// create image from resized bitmap to apply blur
|
|
using (var paint = new SKPaint())
|
|
using (var filter = SKImageFilter.CreateBlur(blur, blur))
|
|
{
|
|
paint.ImageFilter = filter;
|
|
canvas.DrawBitmap(resizedBitmap, SKRect.Create(width, height), paint);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// draw resized bitmap onto canvas
|
|
canvas.DrawBitmap(resizedBitmap, SKRect.Create(width, height));
|
|
}
|
|
|
|
// If foreground layer present then draw
|
|
if (hasForegroundColor)
|
|
{
|
|
if (!double.TryParse(options.ForegroundLayer, out double opacity))
|
|
{
|
|
opacity = .4;
|
|
}
|
|
|
|
canvas.DrawColor(new SKColor(0, 0, 0, (byte)((1 - opacity) * 0xFF)), SKBlendMode.SrcOver);
|
|
}
|
|
|
|
if (hasIndicator)
|
|
{
|
|
DrawIndicator(canvas, width, height, options);
|
|
}
|
|
|
|
Directory.CreateDirectory(Path.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;
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public void CreateImageCollage(ImageCollageOptions options)
|
|
{
|
|
double ratio = (double)options.Width / options.Height;
|
|
|
|
if (ratio >= 1.4)
|
|
{
|
|
new StripCollageBuilder(this).BuildThumbCollage(options.InputPaths, options.OutputPath, options.Width, options.Height);
|
|
}
|
|
else if (ratio >= .9)
|
|
{
|
|
new StripCollageBuilder(this).BuildSquareCollage(options.InputPaths, options.OutputPath, options.Width, options.Height);
|
|
}
|
|
else
|
|
{
|
|
// TODO: Create Poster collage capability
|
|
new StripCollageBuilder(this).BuildSquareCollage(options.InputPaths, options.OutputPath, options.Width, options.Height);
|
|
}
|
|
}
|
|
|
|
private void DrawIndicator(SKCanvas canvas, int imageWidth, int imageHeight, ImageProcessingOptions options)
|
|
{
|
|
try
|
|
{
|
|
var currentImageSize = new ImageDimensions(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");
|
|
}
|
|
}
|
|
}
|
|
}
|