GNU bug report logs - #64908
29.1; svg parse failure

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From: David Ponce <da_vid <at> orange.fr>
To: Alan Third <alan <at> idiocy.org>, Eli Zaretskii <eliz <at> gnu.org>, 64908 <at> debbugs.gnu.org
Subject: bug#64908: 29.1; svg parse failure
Date: Tue, 8 Aug 2023 15:58:25 +0200

[Message part 1 (text/plain, inline)]

On 05/08/2023 22:04, David Ponce wrote:
> On 05/08/2023 20:31, Alan Third wrote:
>> On Sat, Aug 05, 2023 at 08:00:17PM +0200, David Ponce wrote:
>>> On 05/08/2023 19:39, Alan Third wrote:
>>>> On Sat, Aug 05, 2023 at 07:37:01PM +0200, David Ponce wrote:
>>>>>
>>>>> I just tried patch V3, and the result is the same:
>>>>> insert-image produces the same black square of 22x22 pixels.
>>>>
>>>> Can you try changing the initialisation of zero_rect to {0, 0, 10,
>>>> 10}?
>>>>
>>>> I remember a lot of trial and error with this originally, and it looks
>>>> like they may have changed how it works.
>>>
>>> It is better :-)
>>>
>>> Before call to rsvg_handle_get_geometry_for_layer:
>>>
>>> (gdb) print zero_rect
>>> $1 = {x = 0, y = 0, width = 10, height = 10}
>>> (gdb) print viewbox
>>> $2 = {x = 6.9533474147268633e-310, y = 2.3106462124703418e-319, width = 5.8283471538673388e-315, height = 9.8813129168249309e-323}
>>> (gdb) print out_logical_rect
>>> $3 = {x = 6.9533558057749482e-310, y = 6.9533473517748961e-310, width = 1.4821969375237396e-323, height = 3.0586981611317814e-317}
>>>
>>> After call:
>>>
>>> (gdb) print $eax
>>> $4 = 1
>>> (gdb) print zero_rect
>>> $5 = {x = 0, y = 0, width = 10, height = 10}
>>> (gdb) print viewbox
>>> $6 = {x = 7, y = 3, width = 8.70703125, height = 16}
>>> (gdb) print out_logical_rect
>>> $7 = {x = 7, y = 3, width = 8.70703125, height = 16}
>>>
>>> Now I see the image, aligned at bottom right on the line (see the screenshot).
>>
>> OK. I really don't understand how this works, and I'm sure some older
>> version of librsvg required a viewport of zero size, but I don't know
>> which, so this is all a bit of a stab in the dark. Anyway, patch
>> attached with a viewport that is hopefully big enough for all the SVGs
>> we'll ever see. :)
>>
> 
> With this last patch V4, insert-image works well for the various SVG images I tested.
> Centering image on the line using the :ascent center property works well too.
> 
> The situation is far better now :-)
> 
> Thank you very much!
> 

Attached the updated patch V4 so that it can apply on the latest master.

Thanks

[v4-0002-Fix-percentage-sizes-in-SVG-display-bug-64908.patch (text/x-patch, attachment)]

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