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Re: BMP bug in ImageIO?
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Re: BMP bug in ImageIO?


  • Subject: Re: BMP bug in ImageIO?
  • From: John Stiles <email@hidden>
  • Date: Fri, 11 Jan 2008 01:34:52 -0800

A negative height in the BMP header means that the scanlines are stored from top-to-bottom (rather than bottom-to-top, which is what you get if you put a positive height). I don't believe that this is a bug.


On Jan 11, 2008, at 8:36 AM, Sean McBride wrote:

On 1/11/08 10:43 AM, Rimas said:

I am not sure where should I post, but I think, I have found a bug in
ImageIO framework.

I am using this framework to save images. Noticed (using 'file'
command in terminal) that BMP images, created with ImageIO has
negative height (PC bitmap data, Windows 3.x format, 1200 x -900 x
24). Such images causes open problems on Windows.
The same happens when saving images in BMP format with Apple Preview
(I am sure it uses the same ImageIO).

File a bug with a test case at <https://bugreport.apple.com>

--
____________________________________________________________
Sean McBride, B. Eng                 email@hidden
Rogue Research                        www.rogue-research.com
Mac Software Developer              Montréal, Québec, Canada

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References: 
 >BMP bug in ImageIO? (From: Rimas <email@hidden>)
 >Re: BMP bug in ImageIO? (From: "Sean McBride" <email@hidden>)

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