[Geotools-devel] Reading PNGs with gt2-image and no native jai libs fails

[Andrea A. <aa...@op...>]

When trying to read images using gt2-image with jai and jai
image i/o in the path, but no native libs around, I get
the following:

Caused by: java.lang.RuntimeException: javax.imageio.IIOException: I/O 
error reading PNG header!
	at 
com.sun.media.jai.imageioimpl.ImageReadCRIF.create(ImageReadCRIF.java:317)
	... 50 more
Caused by: javax.imageio.IIOException: I/O error reading PNG header!
	at 
com.sun.imageio.plugins.png.PNGImageReader.readHeader(PNGImageReader.java:296)
	at 
com.sun.imageio.plugins.png.PNGImageReader.getImageTypes(PNGImageReader.java:1402)
	at javax.imageio.ImageReader.getRawImageType(ImageReader.java:665)
	at 
com.sun.media.jai.imageioimpl.ImageReadOpImage.layoutHelper(ImageReadOpImage.java:228)
	at 
com.sun.media.jai.imageioimpl.ImageReadOpImage.<init>(ImageReadOpImage.java:473)
	at 
com.sun.media.jai.imageioimpl.ImageReadCRIF.create(ImageReadCRIF.java:309)
	... 50 more
Caused by: javax.imageio.IIOException: Bad length for IHDR chunk!
	at 
com.sun.imageio.plugins.png.PNGImageReader.readHeader(PNGImageReader.java:232)
	... 55 more

This happens with quite a few png's I've tried generating with
different programs (gdal, microsoft paint, ...).
When the native libs are not available, maybe it's better to fall
back on the j2se png reader?

Cheers
Andrea