From 27bc77fc57e461c92888043190f70f7e12837ab5 Mon Sep 17 00:00:00 2001
From: timmolter <tim.molter@gmail.com>
Date: Sat, 22 Sep 2012 21:12:56 +0200
Subject: [PATCH] added jpeg saving
---
.../java/com/xeiam/xchart/BitmapEncoder.java | 52 ++++++++++++++++---
1 file changed, 45 insertions(+), 7 deletions(-)
diff --git a/src/main/java/com/xeiam/xchart/BitmapEncoder.java b/src/main/java/com/xeiam/xchart/BitmapEncoder.java
index 39c1fa5b..8ee8fab6 100644
--- a/src/main/java/com/xeiam/xchart/BitmapEncoder.java
+++ b/src/main/java/com/xeiam/xchart/BitmapEncoder.java
@@ -17,13 +17,22 @@ package com.xeiam.xchart;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
+import java.util.Iterator;
+import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
+import javax.imageio.ImageWriteParam;
+import javax.imageio.ImageWriter;
+import javax.imageio.stream.FileImageOutputStream;
/**
+ * A helper class with static methods for saving Charts as bitmaps
+ *
* @author timmolter
*/
public class BitmapEncoder {
@@ -36,22 +45,51 @@ public class BitmapEncoder {
}
/**
- * Saves a chart as a PNG file
+ * Save a Chart as a PNG file
*
* @param chart
- * @param pFileName
+ * @param fileName
* @throws IOException
*/
- public static void savePNG(Chart chart, String pFileName) throws IOException {
+ public static void savePNG(Chart chart, String fileName) throws IOException {
- BufferedImage lBufferedImage = new BufferedImage(chart.width, chart.height, BufferedImage.TYPE_INT_RGB);
- Graphics2D lGraphics2D = lBufferedImage.createGraphics();
+ BufferedImage bufferedImage = new BufferedImage(chart.width, chart.height, BufferedImage.TYPE_INT_RGB);
+ Graphics2D lGraphics2D = bufferedImage.createGraphics();
chart.paint(lGraphics2D);
// Save chart as PNG
- OutputStream out = new FileOutputStream(pFileName);
- ImageIO.write(lBufferedImage, "png", out);
+ OutputStream out = new FileOutputStream(fileName);
+ ImageIO.write(bufferedImage, "png", out);
out.close();
}
+ /**
+ * Save a Chart as a JPEG file
+ *
+ * @param chart
+ * @param fileName
+ * @param quality - // a float between 0 and 1 (1 = maximum quality)
+ * @throws FileNotFoundException
+ * @throws IOException
+ */
+ public static void saveJPG(Chart chart, String fileName, float quality) throws FileNotFoundException, IOException {
+
+ BufferedImage bufferedImage = new BufferedImage(chart.width, chart.height, BufferedImage.TYPE_INT_RGB);
+ Graphics2D lGraphics2D = bufferedImage.createGraphics();
+ chart.paint(lGraphics2D);
+
+ Iterator<ImageWriter> iter = ImageIO.getImageWritersByFormatName("jpeg");
+ ImageWriter writer = iter.next();
+ // instantiate an ImageWriteParam object with default compression options
+ ImageWriteParam iwp = writer.getDefaultWriteParam();
+ iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
+ iwp.setCompressionQuality(quality);
+ File file = new File(fileName);
+ FileImageOutputStream output = new FileImageOutputStream(file);
+ writer.setOutput(output);
+ IIOImage image = new IIOImage(bufferedImage, null, null);
+ writer.write(null, image, iwp);
+ writer.dispose();
+ }
+
}
--
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