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From "Myroslav Golub (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (IMAGING-162) BMP files with negative bitmap height are not supported
Date Mon, 09 Feb 2015 14:51:35 GMT

    [ https://issues.apache.org/jira/browse/IMAGING-162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14312305#comment-14312305
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Myroslav Golub edited comment on IMAGING-162 at 2/9/15 2:51 PM:
----------------------------------------------------------------

Attached a monochrome 4x8 bitmap with negative height value.


was (Author: mgolub):
A monochrome 4x8 bitmap with negative height value.

> BMP files with negative bitmap height are not supported
> -------------------------------------------------------
>
>                 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
>
>         Attachments: monochrome-negative-height.bmp
>
>
> 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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