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These are the known bugs and enhancement requests for the
current Java Advanced Imaging
1.1 release. They are not in any priority order
and we do not promise that all will get fixed before the
next release. If a bug listed below is
affecting your work with the Java
Advanced Imaging API,
please let us know so we may assign it the proper priority.
To report a bug that is not on this list, please see the
Bug Report instructions.
Java Advanced Imaging API Reference
Port Bugs
These bugs are due to code within JAI itself.
Core Bugs
- If an
ImageLayout hint corresponding to
JAI.KEY_IMAGE_LAYOUT is in the RenderingHints
set on an operation node, the ImageLayout contains a
ColorModel but no SampleModel, and the
ColorModel is incompatible with the first source image's
SampleModel, then the ColorModel hint will
be ignored. A workaround is also to set a SampleModel in
the ImageLayout for example as:
// Variables (initialization omitted)
RenderedImage src;
ParameterBlock pb;
ColorModel cm;
// Create hints with desired ColorModel and derived SampleModel.
ImageLayout il = new ImageLayout();
il.setColorModel(cm);
il.setSampleModel(cm.createCompatibleSampleModel(src.getTileWidth(),
src.getTileHeight()));
RenderingHints rh = new RenderingHints(JAI.KEY_IMAGE_LAYOUT, il);
// Create the operation.
RenderedOp dst = JAI.create("affine", pb, rh);
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KernelJAI never sets the values of the instance variables
isHorizontallySymmetric and isVerticallySymmetric.
Operator Bugs
- No known significant bugs at this time.
Remote Imaging Bugs
- No known bugs at this time.
Codec Bugs
- The GIF decoder does not handle GIF files with
transparent background correctly. It ignores the background value if
it's marked as transparent and the image comes out with a black background
regardless of the original background index palette entry.
- The BMP, JPEG, and TIFF encoders cannot encode
BufferedImages
of type BufferedImage.TYPE_INT_RGB. This is due to the encoder
interpreting the data as 32 bits per sample. A workaround would be to re-format
the image to have 8 bits per sample (for example with a
ComponentSampleModel) before encoding. The "format" operator
may be used for this purpose.
- The BMP decoder may not handle certain 16-bit RGB images correctly.
When a 16-bit RGB image is loaded, a 888 RGB
ColorModel
is attached. Workarounds for this include generating a correct
ColorModel based on the masks or shifting the data to fill
the full 8 bits for each component.
- When the JVM is terminated abnormally, temporary files created by
FileCacheSeekableStream may not be removed. Such files are
located in the system-dependent default temporary-file directory discussed
in java.io.File.createTempFile(String,String,File). The file
names have the prefix jai-FCSS- and the suffix .tmp. While this
is not really a bug as it is the behavior specified by
java.io.File.deleteOnExit(), users may encounter this situation
and prefer to implement some means of automatically deleting these files
should they become troublesome.
Java 2D Bugs Affecting Java Advanced Imaging API
These are known Java 2D bugs which
may cause problems using JAI or be manifested via JAI.
-
isCompatibleSampleModel() method in ComponentColorModel
and PackedColorModel classes in java.awt.image: neither
method verifies that the number of SampleModel bands matches the
number of ColorModel components and the
ComponentColorModel does not verify that
SampleModel.getSampleSize(b) is at least
ColorModel.getComponentSize(b) for all bands b.
Additional Problems/Limitations of Note
These are items which are not bugs per se.
Some of this information is duplicated from the
README page.
Codecs
Applets
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