From: Jeremias Maerki <jeremias@apache.org>
Date: Wed, 8 Nov 2006 14:57:00 +0000 (+0000)
Subject: Handle the case where no ImageWriter is returned. Avoids an NPE.
X-Git-Tag: fop-0_93~38
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=4c93969457b927234041dad59bc01de133f22534;p=xmlgraphics-fop.git

Handle the case where no ImageWriter is returned. Avoids an NPE.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@472508 13f79535-47bb-0310-9956-ffa450edef68
---

diff --git a/src/java/org/apache/fop/render/bitmap/PNGRenderer.java b/src/java/org/apache/fop/render/bitmap/PNGRenderer.java
index 82eb65023..19573e4d9 100644
--- a/src/java/org/apache/fop/render/bitmap/PNGRenderer.java
+++ b/src/java/org/apache/fop/render/bitmap/PNGRenderer.java
@@ -141,6 +141,11 @@ public class PNGRenderer extends Java2DRenderer {
                 
                 // Encode PNG image
                 ImageWriter writer = ImageWriterRegistry.getInstance().getWriterFor(getMimeType());
+                if (writer == null) {
+                    throw new IOException("Could not get an ImageWriter to produce " 
+                            + getMimeType() + ". The most likely explanation for this is a class"
+                            + " loading problem.");
+                }
                 log.debug("Writing image using " + writer.getClass().getName());
                 writer.writeImage(image, os, params);
             } finally {