Re: [Emacs-diffs] emacs/lisp image.el

[Juri Linkov]

>> Log message:
>>        (image-type-header-regexps): Use only JPEG magic number
>>        to determine JPEG images, and don't use `image-jpeg-p' because
>>        Emacs can display non-JFIF non-Exif JPEG images.
>
> Then we should perhaps obsolete `image-jpeg-p' (which is not used
> anymore in the sources).
>
> Currently it does what its docstring says, but there's some of a
> mismatch with the name (which seems to imply more generality); also it
> is not clear what purpose does serve a function to detect just
> JFIF/Exif JPEGs. And generalizing it would turn it into a trivial
> two-liner.

I left `image-jpeg-p' in image.el for the case it's used by some
external packages or .emacs files since it contains a non-trivial
algorithm for detecting JFIF/Exif JPEGs.  Even though its name is
not too specific, its docstring explains what it does.

-- 
Juri Linkov
http://www.jurta.org/emacs/