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bug#12506: 24.2.50; Docview shrinks width to fit screen
From: |
Ivan Andrus |
Subject: |
bug#12506: 24.2.50; Docview shrinks width to fit screen |
Date: |
Tue, 25 Sep 2012 15:14:41 +0200 |
On Sep 25, 2012, at 10:39 AM, Tassilo Horn wrote:
> 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.
Perhaps it's a NextStep only problem.
> 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.
I'm pretty sure I don't have it with ImageMagick support. The above gives me
an error, and the configure logs confirm this.
> ,----[ (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?
I also see the same problem with a jpeg in image mode. I should have checked
that first, sorry. Of course, I can't scale the image, but the squishing
definitely occurs.
-Ivan