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122 lines
4 KiB
C#
122 lines
4 KiB
C#
using ImageMagickSharp;
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Common.IO;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Threading.Tasks;
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namespace MediaBrowser.Server.Implementations.Photos
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{
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public static class DynamicImageHelpers
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{
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public static async Task<Stream> GetThumbCollage(List<string> files,
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IFileSystem fileSystem,
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int width,
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int height, IApplicationPaths appPaths)
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{
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if (files.Any(string.IsNullOrWhiteSpace))
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{
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throw new ArgumentException("Empty file found in files list");
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}
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if (files.Count < 3)
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{
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return await GetSingleImage(files, fileSystem).ConfigureAwait(false);
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}
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const int rows = 1;
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const int cols = 3;
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int cellWidth = 2 * (width / 3);
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int cellHeight = height;
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var index = 0;
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using (var wand = new MagickWand(width, height, new PixelWand(ColorName.None, 1)))
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{
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for (var row = 0; row < rows; row++)
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{
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for (var col = 0; col < cols; col++)
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{
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var x = col * (cellWidth / 2);
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var y = row * cellHeight;
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if (files.Count > index)
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{
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using (var innerWand = new MagickWand(files[index]))
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{
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innerWand.CurrentImage.ResizeImage(cellWidth, cellHeight);
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wand.CurrentImage.CompositeImage(innerWand, CompositeOperator.OverCompositeOp, x, y);
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}
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}
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index++;
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}
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}
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return GetStream(wand, appPaths);
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}
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}
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public static async Task<Stream> GetSquareCollage(List<string> files,
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IFileSystem fileSystem,
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int size, IApplicationPaths appPaths)
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{
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if (files.Any(string.IsNullOrWhiteSpace))
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{
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throw new ArgumentException("Empty file found in files list");
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}
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if (files.Count < 4)
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{
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return await GetSingleImage(files, fileSystem).ConfigureAwait(false);
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}
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const int rows = 2;
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const int cols = 2;
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int singleSize = size / 2;
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var index = 0;
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using (var wand = new MagickWand(size, size, new PixelWand(ColorName.None, 1)))
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{
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for (var row = 0; row < rows; row++)
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{
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for (var col = 0; col < cols; col++)
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{
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var x = col * singleSize;
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var y = row * singleSize;
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using (var innerWand = new MagickWand(files[index]))
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{
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innerWand.CurrentImage.ResizeImage(singleSize, singleSize);
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wand.CurrentImage.CompositeImage(innerWand, CompositeOperator.OverCompositeOp, x, y);
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}
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index++;
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}
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}
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return GetStream(wand, appPaths);
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}
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}
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private static Task<Stream> GetSingleImage(List<string> files, IFileSystem fileSystem)
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{
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return Task.FromResult<Stream>(fileSystem.GetFileStream(files[0], FileMode.Open, FileAccess.Read, FileShare.Read));
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}
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private static Stream GetStream(MagickWand image, IApplicationPaths appPaths)
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{
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var tempFile = Path.Combine(appPaths.TempDirectory, Guid.NewGuid().ToString("N") + ".png");
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Directory.CreateDirectory(Path.GetDirectoryName(tempFile));
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image.CurrentImage.CompressionQuality = 100;
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image.SaveImage(tempFile);
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return File.OpenRead(tempFile);
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}
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}
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}
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