From: Lars Ingebrigtsen <larsi@gnus.org>
To: "Devon Sean McCullough" <Emacs-Hacker2016@jovi.net>
Cc: 26133@debbugs.gnu.org
Subject: bug#26133: 25.1; XBM images broken - worked in 24.3
Date: Fri, 26 Jul 2019 13:47:00 +0200 [thread overview]
Message-ID: <87muh1m30r.fsf@mouse.gnus.org> (raw)
In-Reply-To: <8a9226114b83ddbcb7adf70291ede1b0.squirrel@leaf.websitewelcome.com> (Devon Sean McCullough's message of "Thu, 16 Mar 2017 14:39:06 -0500")
"Devon Sean McCullough" <Emacs-Hacker2016@jovi.net> writes:
> ; Please find attached screen shots of this Emacs 24.3 vs. Emacs 25.1 bug:
> (progn (insert-image (create-image "/* Example at
> https://en.Wikipedia.org/wiki/X_BitMap */
> #define test_width 16
> #define test_height 7
> static char test_bits[] = { 0x13, 0x00, 0x15, 0x00, 0x93, 0xcd, 0x55,
> 0xa5, 0x93, 0xc5, 0x00, 0x80,0x00, 0x60 };"
> (quote xbm) t))
> (insert emacs-version))
> ; MacOS 10.11.6 Emacs 24.3 displays a proper [Blarg] glyph.
> ; MacOS 10.11.6 Emacs 25.1 displays a scrambled [alBgra] glyph with the
> "a" split in two, i.e., [Blarg] glyph with each octet LSB-MSB reversed.
>
> It seems in XBM image bool-vector data
>
> (A) octets are sometimes little-endian and sometimes big-endian
> (B) rows are sometimes padded to octet boundaries and sometimes not
>
> It would be helpful to standardize -- or at least document -- such
> per-version per-platform differences
> as XBM is the only programmatically accessible graphical element natively
> supported in vanilla Emacs!
I'm unable to reproduce this bug with Emacs 27 on GNU/Linux -- are you
still seeing this problem? The image code has gotten a lot of work in
the years after you reported this problem...
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
next prev parent reply other threads:[~2019-07-26 11:47 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-16 19:39 bug#26133: 25.1; XBM images broken - worked in 24.3 Devon Sean McCullough
2019-07-26 11:47 ` Lars Ingebrigtsen [this message]
2019-07-27 10:19 ` Alan Third
2019-12-06 12:56 ` Alan Third
2019-12-06 17:01 ` bug#26133: [PATCH] Fix XBM files on NS (bug#26133) Alan Third
2019-12-10 20:56 ` Alan Third
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