From 5f5f2838b1931a2cf426b778755a417cc662b46f Mon Sep 17 00:00:00 2001
From: LukePulverenti Luke Pulverenti luke pulverenti
 <LukePulverenti Luke Pulverenti luke.pulverenti@gmail.com>
Date: Thu, 12 Jul 2012 23:50:50 -0400
Subject: moved the http server to common, added more http handlers

---
 MediaBrowser.Api/ImageProcessor.cs | 148 +++++++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100644 MediaBrowser.Api/ImageProcessor.cs

(limited to 'MediaBrowser.Api/ImageProcessor.cs')

diff --git a/MediaBrowser.Api/ImageProcessor.cs b/MediaBrowser.Api/ImageProcessor.cs
new file mode 100644
index 000000000..a798123e4
--- /dev/null
+++ b/MediaBrowser.Api/ImageProcessor.cs
@@ -0,0 +1,148 @@
+using System;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+using System.Drawing.Imaging;
+using System.IO;
+
+namespace MediaBrowser.Api
+{
+    public static class ImageProcessor
+    {
+        public static void ProcessImage(string path, Stream toStream, int? width, int? height, int? maxWidth, int? maxHeight, int? quality)
+        {
+            Image originalImage = Image.FromFile(path);
+
+            var newWidth = originalImage.Width;
+            var newHeight = originalImage.Height;
+
+            if (width.HasValue && height.HasValue)
+            {
+                newWidth = width.Value;
+                newHeight = height.Value;
+            }
+
+            else if (height.HasValue)
+            {
+                newWidth = GetNewWidth(newHeight, newWidth, height.Value);
+                newHeight = height.Value;
+            }
+
+            else if (width.HasValue)
+            {
+                newHeight = GetNewHeight(newHeight, newWidth, width.Value);
+                newWidth = width.Value;
+            }
+
+            if (maxHeight.HasValue && maxHeight < newHeight)
+            {
+                newWidth = GetNewWidth(newHeight, newWidth, maxHeight.Value);
+                newHeight = maxHeight.Value;
+            }
+
+            if (maxWidth.HasValue && maxWidth < newWidth)
+            {
+                newHeight = GetNewHeight(newHeight, newWidth, maxWidth.Value);
+                newWidth = maxWidth.Value;
+            }
+
+            Bitmap thumbnail = new Bitmap(newWidth, newHeight, originalImage.PixelFormat);
+            thumbnail.SetResolution(originalImage.HorizontalResolution, originalImage.VerticalResolution);
+
+            Graphics thumbnailGraph = Graphics.FromImage(thumbnail);
+            thumbnailGraph.CompositingQuality = CompositingQuality.HighQuality;
+            thumbnailGraph.SmoothingMode = SmoothingMode.HighQuality;
+            thumbnailGraph.InterpolationMode = InterpolationMode.HighQualityBicubic;
+            thumbnailGraph.PixelOffsetMode = PixelOffsetMode.HighQuality;
+            thumbnailGraph.CompositingMode = CompositingMode.SourceOver;
+
+            thumbnailGraph.DrawImage(originalImage, 0, 0, newWidth, newHeight);
+
+            Write(originalImage, thumbnail, toStream, quality);
+
+            thumbnailGraph.Dispose();
+            thumbnail.Dispose();
+            originalImage.Dispose();
+        }
+        
+        private static void Write(Image originalImage, Image newImage, Stream toStream, int? quality)
+        {
+            // Use special save methods for jpeg and png that will result in a much higher quality image
+            // All other formats use the generic Image.Save
+            if (ImageFormat.Jpeg.Equals(originalImage.RawFormat))
+            {
+                SaveJpeg(newImage, toStream, quality);
+            }
+            else if (ImageFormat.Png.Equals(originalImage.RawFormat))
+            {
+                SavePng(newImage, toStream);
+            }
+            else
+            {
+                newImage.Save(toStream, originalImage.RawFormat);
+            }
+        }
+
+        private static void SaveJpeg(Image newImage, Stream target, int? quality)
+        {
+            if (!quality.HasValue)
+            {
+                quality = 90;
+            }
+
+            using (EncoderParameters encoderParameters = new EncoderParameters(1))
+            {
+                encoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, quality.Value);
+                newImage.Save(target, GetImageCodeInfo("image/jpeg"), encoderParameters);
+            }
+        }
+
+        private static void SavePng(Image newImage, Stream target)
+        {
+            if (target.CanSeek)
+            {
+                newImage.Save(target, ImageFormat.Png);
+            }
+            else
+            {
+                using (MemoryStream ms = new MemoryStream(4096))
+                {
+                    newImage.Save(ms, ImageFormat.Png);
+                    ms.WriteTo(target);
+                }
+            }
+        }
+
+        private static ImageCodecInfo GetImageCodeInfo(string mimeType)
+        {
+            ImageCodecInfo[] info = ImageCodecInfo.GetImageEncoders();
+
+            for (int i = 0; i < info.Length; i++)
+            {
+                ImageCodecInfo ici = info[i];
+                if (ici.MimeType.Equals(mimeType, StringComparison.OrdinalIgnoreCase))
+                {
+                    return ici;
+                }
+            }
+            return info[1];
+        }
+
+        private static int GetNewWidth(int currentHeight, int currentWidth, int newHeight)
+        {
+            decimal scaleFactor = newHeight;
+            scaleFactor /= currentHeight;
+            scaleFactor *= currentWidth;
+
+            return Convert.ToInt32(scaleFactor);
+        }
+
+        private static int GetNewHeight(int currentHeight, int currentWidth, int newWidth)
+        {
+            decimal scaleFactor = newWidth;
+            scaleFactor /= currentWidth;
+            scaleFactor *= currentHeight;
+
+            return Convert.ToInt32(scaleFactor);
+        }
+    }
+}
-- 
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