1 files changed, 158 insertions, 0 deletions
diff --git a/MediaBrowser.Server.Implementations/Photos/DynamicImageHelpers.cs b/MediaBrowser.Server.Implementations/Photos/DynamicImageHelpers.cs
new file mode 100644
index 000000000..1099bd170
--- /dev/null
+++ b/MediaBrowser.Server.Implementations/Photos/DynamicImageHelpers.cs
@@ -0,0 +1,158 @@
+using MediaBrowser.Common.IO;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+using System.Drawing.Imaging;
+using System.IO;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Server.Implementations.Photos
+{
+    public static class DynamicImageHelpers
+    {
+        public static async Task<Stream> GetThumbCollage(List<string> files,
+            IFileSystem fileSystem,
+            int width,
+            int height)
+        {
+            if (files.Count < 3)
+            {
+                return await GetSingleImage(files, fileSystem).ConfigureAwait(false);
+            }
+
+            const int rows = 1;
+            const int cols = 3;
+
+            int cellWidth = 2 * (width / 3);
+            int cellHeight = height;
+            var index = 0;
+
+            var img = new Bitmap(width, height, PixelFormat.Format32bppPArgb);
+
+            using (var graphics = Graphics.FromImage(img))
+            {
+                graphics.CompositingQuality = CompositingQuality.HighQuality;
+                graphics.SmoothingMode = SmoothingMode.HighQuality;
+                graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
+                graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
+                graphics.CompositingMode = CompositingMode.SourceCopy;
+
+                for (var row = 0; row < rows; row++)
+                {
+                    for (var col = 0; col < cols; col++)
+                    {
+                        var x = col * (cellWidth / 2);
+                        var y = row * cellHeight;
+
+                        if (files.Count > index)
+                        {
+                            using (var fileStream = fileSystem.GetFileStream(files[index], FileMode.Open, FileAccess.Read, FileShare.Read, true))
+                            {
+                                using (var memoryStream = new MemoryStream())
+                                {
+                                    await fileStream.CopyToAsync(memoryStream).ConfigureAwait(false);
+
+                                    memoryStream.Position = 0;
+
+                                    using (var imgtemp = Image.FromStream(memoryStream, true, false))
+                                    {
+                                        graphics.DrawImage(imgtemp, x, y, cellWidth, cellHeight);
+                                    }
+                                }
+                            }
+                        }
+
+                        index++;
+                    }
+                }
+            }
+
+            return GetStream(img);
+        }
+
+        public static async Task<Stream> GetSquareCollage(List<string> files,
+            IFileSystem fileSystem,
+            int size)
+        {
+            if (files.Count < 4)
+            {
+                return await GetSingleImage(files, fileSystem).ConfigureAwait(false);
+            }
+
+            const int rows = 2;
+            const int cols = 2;
+
+            int singleSize = size / 2;
+            var index = 0;
+
+            var img = new Bitmap(size, size, PixelFormat.Format32bppPArgb);
+
+            using (var graphics = Graphics.FromImage(img))
+            {
+                graphics.CompositingQuality = CompositingQuality.HighQuality;
+                graphics.SmoothingMode = SmoothingMode.HighQuality;
+                graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
+                graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
+                graphics.CompositingMode = CompositingMode.SourceCopy;
+
+                for (var row = 0; row < rows; row++)
+                {
+                    for (var col = 0; col < cols; col++)
+                    {
+                        var x = col * singleSize;
+                        var y = row * singleSize;
+
+                        using (var fileStream = fileSystem.GetFileStream(files[index], FileMode.Open, FileAccess.Read, FileShare.Read, true))
+                        {
+                            using (var memoryStream = new MemoryStream())
+                            {
+                                await fileStream.CopyToAsync(memoryStream).ConfigureAwait(false);
+
+                                memoryStream.Position = 0;
+
+                                using (var imgtemp = Image.FromStream(memoryStream, true, false))
+                                {
+                                    graphics.DrawImage(imgtemp, x, y, singleSize, singleSize);
+                                }
+                            }
+                        }
+
+                        index++;
+                    }
+                }
+            }
+
+            return GetStream(img);
+        }
+
+        private static Task<Stream> GetSingleImage(List<string> files, IFileSystem fileSystem)
+        {
+            return Task.FromResult<Stream>(fileSystem.GetFileStream(files[0], FileMode.Open, FileAccess.Read, FileShare.Read));
+        }
+
+        private static Stream GetStream(Image image)
+        {
+            var ms = new MemoryStream();
+
+            image.Save(ms, ImageFormat.Png);
+
+            ms.Position = 0;
+
+            return ms;
+        }
+
+        private static async Task<Image> GetImage(string file, IFileSystem fileSystem)
+        {
+            using (var fileStream = fileSystem.GetFileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read, true))
+            {
+                var memoryStream = new MemoryStream();
+
+                await fileStream.CopyToAsync(memoryStream).ConfigureAwait(false);
+
+                memoryStream.Position = 0;
+
+                return Image.FromStream(memoryStream, true, false);
+            }
+        }
+    }
+}