From ba5dd02852d62fc8cd2e6ec1cd748ebeb1f93af2 Mon Sep 17 00:00:00 2001
From: srowen <srowen@59b500cc-1b3d-0410-9834-0bbf25fbcc57>
Date: Wed, 1 Aug 2012 23:48:37 +0000
Subject: [PATCH] Speedup for black/white image rendering

git-svn-id: https://zxing.googlecode.com/svn/trunk@2365 59b500cc-1b3d-0410-9834-0bbf25fbcc57
---
 .../com/google/zxing/client/j2se/MatrixToImageConfig.java  | 7 +++++++
 .../com/google/zxing/client/j2se/MatrixToImageWriter.java  | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/javase/src/com/google/zxing/client/j2se/MatrixToImageConfig.java b/javase/src/com/google/zxing/client/j2se/MatrixToImageConfig.java
index 1054763ca..a959cff09 100644
--- a/javase/src/com/google/zxing/client/j2se/MatrixToImageConfig.java
+++ b/javase/src/com/google/zxing/client/j2se/MatrixToImageConfig.java
@@ -16,6 +16,8 @@
 
 package com.google.zxing.client.j2se;
 
+import java.awt.image.BufferedImage;
+
 /**
  * Encapsulates custom configuration used in methods of {@link MatrixToImageWriter}.
  */
@@ -52,4 +54,9 @@ public final class MatrixToImageConfig {
     return offColor;
   }
 
+  int getBufferedImageColorModel() {
+    // Use faster BINARY if colors match default
+    return onColor == BLACK && offColor == WHITE ? BufferedImage.TYPE_BYTE_BINARY : BufferedImage.TYPE_INT_RGB;
+  }
+
 }
\ No newline at end of file
diff --git a/javase/src/com/google/zxing/client/j2se/MatrixToImageWriter.java b/javase/src/com/google/zxing/client/j2se/MatrixToImageWriter.java
index c4d3724e4..e4c11b472 100644
--- a/javase/src/com/google/zxing/client/j2se/MatrixToImageWriter.java
+++ b/javase/src/com/google/zxing/client/j2se/MatrixToImageWriter.java
@@ -51,7 +51,7 @@ public final class MatrixToImageWriter {
   public static BufferedImage toBufferedImage(BitMatrix matrix, MatrixToImageConfig config) {
     int width = matrix.getWidth();
     int height = matrix.getHeight();
-    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+    BufferedImage image = new BufferedImage(width, height, config.getBufferedImageColorModel());
     int onColor = config.getPixelOnColor();
     int offColor = config.getPixelOffColor();
     for (int x = 0; x < width; x++) {