From c018eba9a2c57157ed9ecc6add87c116164ac438 Mon Sep 17 00:00:00 2001
From: erik <erik>
Date: Mon, 12 Jan 2009 03:53:38 +0000
Subject: [PATCH] tweaks to improve image quality

---
 .../forkalsrud/album/web/AlbumServlet.java    | 27 +++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/src/org/forkalsrud/album/web/AlbumServlet.java b/src/org/forkalsrud/album/web/AlbumServlet.java
index 29f4fa6..f061df8 100644
--- a/src/org/forkalsrud/album/web/AlbumServlet.java
+++ b/src/org/forkalsrud/album/web/AlbumServlet.java
@@ -1,15 +1,21 @@
 package org.forkalsrud.album.web;
 
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
 import java.awt.geom.AffineTransform;
+import java.awt.image.AffineTransformOp;
 import java.awt.image.BufferedImage;
+import java.awt.image.ColorModel;
 import java.io.File;
 import java.io.IOException;
 import java.util.Iterator;
 
+import javax.imageio.IIOImage;
 import javax.imageio.ImageIO;
 import javax.imageio.ImageReadParam;
 import javax.imageio.ImageReader;
+import javax.imageio.ImageTypeSpecifier;
+import javax.imageio.ImageWriteParam;
 import javax.imageio.ImageWriter;
 import javax.imageio.stream.ImageInputStream;
 import javax.imageio.stream.ImageOutputStream;
@@ -152,6 +158,7 @@ public class AlbumServlet
         ImageInputStream iis = ImageIO.createImageInputStream(file);
         reader.setInput(iis, true);
         ImageReadParam param = reader.getDefaultReadParam();
+//        param.setDestinationType(ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_INT_ARGB));
         if (false /* subsampling */) {
             double subSampleScale = (double)outd.getWidth() / orig.getWidth();
             int subSampling = (int)Math.floor(0.25d/subSampleScale);
@@ -160,7 +167,7 @@ public class AlbumServlet
             }
         }
         BufferedImage img = reader.read(0, param);
-
+        
         // Recalculate scale after sub-sampling was applied
         double scale;
         AffineTransform xform;
@@ -175,16 +182,32 @@ public class AlbumServlet
             scale = (double)outd.getWidth() / img.getWidth();
             xform = AffineTransform.getScaleInstance(scale, scale);
         }
+//        AffineTransformOp operation = new AffineTransformOp(xform, AffineTransformOp.TYPE_BICUBIC);
+//        BufferedImage buf2 = operation.createCompatibleDestImage(img, img.getColorModel());
         BufferedImage buf2 = new BufferedImage(outd.getWidth(), outd.getHeight(), img.getType());
+
+//        operation.filter(img, buf2);
+
         Graphics2D g2 = buf2.createGraphics();
+        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
+        g2.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
+        g2.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
+
         g2.transform(xform);
         g2.drawImage(img, 0, 0, null);
 
+//        g2.drawImage(img, operation, 0, 0);
+
+
         Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("jpg");
         ImageWriter writer = writers.next();
+        ImageWriteParam wParam = writer.getDefaultWriteParam();
+        wParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
+        wParam.setCompressionQuality(1.0f);
         ImageOutputStream ios = ImageIO.createImageOutputStream(res.getOutputStream());
         writer.setOutput(ios);
-        writer.write(buf2);
+        writer.write(null, new IIOImage(buf2, null, null), wParam);
     }