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bug#12506: 24.2.50; Docview shrinks width to fit screen
From: |
Tassilo Horn |
Subject: |
bug#12506: 24.2.50; Docview shrinks width to fit screen |
Date: |
Tue, 25 Sep 2012 10:39:39 +0200 |
User-agent: |
Gnus/5.130006 (Ma Gnus v0.6) Emacs/24.2.50 (gnu/linux) |
Ivan Andrus <darthandrus@gmail.com> writes:
> I occasionally use doc-view-mode to read pdfs. I have noticed that if
> the window is skinnier than the width of the pdf then the width is
> shrunk so that it all fits. However, the height is not affected.
> This leads to "squished" text which is unreadable.
>
> To see the effect:
>
> 1. emacs -Q
> 2. open a pdf in doc-view-mode
> 3. type "W" for `doc-view-fit-width-to-window'
> 4. C-x 3 to split the window
> 5. You now have a squished picture.
>
> I think it should not scale the width at all (and it did not use to).
> It makes zooming in impossible. Especially it should not scale the
> width without scaling the height.
I can't reproduce that on a GNU/Linux box. After step 3, the image fits
exactly the width of the emacs window and the height is set correctly to
keep the aspect ratio. After step 4, I have two side-by-side windows,
each showing about the left half of the image, but no squishing.
Have you compiled emacs with ImageMagick support? I guess so, because
else doc-view would fall back to reconversion with any zooming command.
So let's assume you have ImageMagick support, could you please evaluate
;; That's basically what doc-view with ImageMagic does when
;; fitting/zooming
(insert-image
(create-image "/some/image.png"
'imagemagick nil :width 100))
and play a bit with the width parameter? In any case, the image should
keep its original aspect ratio.
,----[ (info "(elisp)ImageMagick Images") ]
| `:width, :height'
| The `:width' and `:height' keywords are used for scaling the
| image. If only one of them is specified, the other one will be
| calculated so as to preserve the aspect ratio. If both are
| specified, aspect ratio may not be preserved.
`----
If you don't have ImageMagick support, could you check if just finding
some png image with image-mode and then splitting has the same squish
effect?
Bye,
Tassilo