Re: segfault in Imager 0.43
From: Peter Leonard (firstname.lastname@example.org)
Date: Wed 25 Aug 2004 - 16:56:04 GMT
Next message: Aaron Dalton: "Imager 0.43 and Perl 5.005_3"
On Wed, 25 Aug 2004, Tony Cook wrote:
> 1) scale() doesn't ensure that the output image is at least 1 pixel by 1
> pixel. The scale(type=>'min', xpixels=>1, ypixels=>1) resulted in an
> image 0 pixels high (since 1/118 = 0.00847 truncates to 0).
> 2) the low level image creation code doesn't ensure images are at least
> 1 x 1 pixels
> 3) the translation code (which takes an RGB image and a palette),
> doesn't handle the case when an empty palette is passed in. Since the
> image generated by scale has no pixels, the generated palette is empty,
> and so the translation stage fails because it expects at least one color
> in the palette.
Thanks for this information - I can at least put in a workaround to not
attempt to save any images where X or Y is not >= 1.