Hello Everyone
Good day to you.
Request your time in reviewing a simple fix for
. Bug : [JDK-6686236] https://bugs.openjdk.java.net/browse/JDK-6686236
. Title : GIF native IIOMetadata assumes characterCellWidth/Height as 2bytes
Root Cause:
. As per the gif image format specification (v89a), Character Cell Width
and Character Cell Height values in Plain Text Extension block occupy 1 Byte
each.
. However, the GIFImageMetadataFormat and GIFWritableImageMetadata allow
values in range [1, 65535] for the above attributes.
. Note: Luckily, The bug does not affect GIFImageWriter because it writes
only a single byte to the output stream. Thus ignoring the 3 higher order bytes
in the "int" variables used for the two attributes.
Information on Fix:
. The max permissible value is now restricted to 255 in both
GIFImageMetadataFormat and GIFWritableImageMetadata.
. In addition, the html documentation describing GIF Image Metadata has
been modified.
. The attached test case verifies changes taken up in both metadata and
metadata format.
Kindly review the change at your convenience.
Link: http://cr.openjdk.java.net/~pnarayanan/6686236/webrev.00/
Thank you for your time
Have a good day
Prahalad N.
