Possible bug in creating TIFF with 4 colours

[yecril71pl]

Code: Select all

convert logo: -colors 4 logo.tiff

The result is useless: black vertical stripes, the image is displaced and cropped.
(Version: 6.6.7.9, openSUSE 11.4 x64)

[fmw42]

I get a similar result on IM 6.6.8.4 Q16 Mac OSX Tiger (with or without +dither).

[yecril71pl]

A simpler test case:

Code: Select all

convert -size 100x400 canvas:red canvas:green +append canvas:blue +append -type Palette c4.tiff

The result is just red

I tried smaller sizes; 4x12 is all right but 8x24 turns all red.

[magick]

Must be a Mac OS thing-- your conversion works fine under Linux. We'll check it out under Mac OS X when we get a chance.

[fmw42]

Note his original post was on (Version: 6.6.7.9, openSUSE 11.4 x64), so not just a Mac issue.

However, this works fine for me on Mac OSX Tiger IM 6.6.8.5 Q16


convert -size 100x400 canvas:red canvas:green +append canvas:blue +append -type Palette c4.tiff

and so does this from the original post:

convert logo: -colors 4 logo.tiff

(no stripes)


So it somehow got fixed between 6.6.8.4 and 6.6.8.5

[yecril71pl]

The result is correct with 6.6.8-5, custom built for TIFF support exclusively.