[FOP-2369] Call "javax.imageio.ImageReader.canReadRaster()" before attempt to read raster

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.1
• Component/s: image/unqualified
• Assignee: Unassigned
• Reporter: Radu Coravu
• Created: 05/May/14 13:12
• Updated: 26/May/14 09:30

Description

The method:

org.apache.xmlgraphics.image.loader.impl.imageio.ImageLoaderImageIO.getFallbackBufferedImage(ImageReader, int, ImageReadParam)

calls:

reader.readRaster(pageIndex, param);

but it should first call "javax.imageio.ImageReader.canReadRaster()" to see if the reader can render the raster.
Otherwise if the image reader cannot render rasters such exceptions may occur:

      [fop] Caused by: java.lang.UnsupportedOperationException
      [fop] 	at com.oxygenxml.media.imageioimpl.plugins.tiff.TIFFImageReader.readRaster(Unknown Source)
      [fop] 	at org.apache.xmlgraphics.image.loader.impl.imageio.ImageLoaderImageIO.getFallbackBufferedImage(ImageLoaderImageIO.java:356)
      [fop] 	at org.apache.xmlgraphics.image.loader.impl.imageio.ImageLoaderImageIO.loadImage(ImageLoaderImageIO.java:157)
      [fop] 	at org.apache.xmlgraphics.image.loader.pipeline.ImageProviderPipeline.execute(ImageProviderPipeline.java:154)
      [fop] 	at org.apache.xmlgraphics.image.loader.pipeline.ImageProviderPipeline.execute(ImageProviderPipeline.java:99)