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From Michael Groß (JIRA) <j...@apache.org>
Subject [jira] [Commented] (IMAGING-162) BMP files with negative bitmap height are not suported
Date Mon, 02 Feb 2015 19:58:34 GMT

    [ https://issues.apache.org/jira/browse/IMAGING-162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14301800#comment-14301800
] 

Michael Groß commented on IMAGING-162:
--------------------------------------

> The BMP format allows for negative values of the height field in the header. This means
that the image lines are stored top-down, not bottom-up as usual

[~mgolub] Can you give me a source (= the ISBN of a book or any link) for the details?

> BMP files with negative bitmap height are not suported
> ------------------------------------------------------
>
>                 Key: IMAGING-162
>                 URL: https://issues.apache.org/jira/browse/IMAGING-162
>             Project: Commons Imaging
>          Issue Type: Bug
>          Components: Format: BMP
>    Affects Versions: 1.0
>            Reporter: Myroslav Golub
>             Fix For: Patch Needed
>
>
> The BMP format allows for negative values of the height field in the header. This means
that the image lines are stored top-down, not bottom-up as usual (i. e. the first pixel in
the pixel array would be in the top left corner of the image, not in the bottom left as usual).
However, when a negative-height bitmap is passed, the BmpImageParser attempts to create an
array of negative length, and a NegativeArraySizeException ensues.



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