On Tue, 21 Apr 2026 18:40:00 GMT, Phil Race <[email protected]> wrote:

>> The bug was filed to note that the constructor for 
>> MultiPixelPackedSampleModel could throw an odd exception if numberOfBits is 
>> zero.
>> Per the spec this should throw RasterFormatException.
>> 
>> 
>> 
>> ---------
>> - [x] I confirm that I make this contribution in accordance with the 
>> [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai).
>
> Phil Race has updated the pull request incrementally with one additional 
> commit since the last revision:
> 
>   8381007

src/java.desktop/share/classes/java/awt/image/MultiPixelPackedSampleModel.java 
line 171:

> 169:             throw new IllegalArgumentException("scanlineStride must be > 
> 0");
> 170:         }
> 171:         if (((numberOfBits * (long)w) / 
> DataBuffer.getDataTypeSize(dataType)) > scanlineStride) {

Should this check uses the same math used in other constructor 
[here](https://github.com/openjdk/jdk/blob/0091060d34dd72d05beffea1e9e5e21d5538d798/src/java.desktop/share/classes/java/awt/image/MultiPixelPackedSampleModel.java#L109)
`1 bit * 9 pixels / 8 size > 1` should cause an exception?

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PR Review Comment: https://git.openjdk.org/jdk/pull/30826#discussion_r3134927303

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