text misplaced in Ruffle

[ousia]

Describe the bug

Player Info

Allows script access: true
Renderer: WebGL
Player type: Object
SWF URL: https://mep-col.sesamath.net/dev/swf/exo240.swf
Param menu: false
Param wmode: window
Param allowScriptAccess: always
Param base: https://mep-col.sesamath.net/dev/swf/
Param flashvars: idMep=240&modeleMep=1&abreviationLangue=fr&idSwf=240&ch=n&idAide=221
Attribute 0: undefined
Attribute 1: undefined
Attribute 2: undefined
Attribute 3: undefined
Attribute 4: undefined
Attribute 5: undefined
Attribute 6: undefined

Page Info

Page URL: https://bibliotheque.sesamath.net/public/voir/239
SWF URL: https://mep-col.sesamath.net/dev/swf/exo240.swf

Browser Info

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/110.0
Platform: Linux x86_64
Has touch support: false

Ruffle Info

Version: 0.1.0
Name: nightly 2022-12-07
Channel: nightly
Built: 2022-12-07T00:18:07.185Z
Commit: 2bb4e2e
Is extension: true

Metadata

width: 735
height: 450
frameRate: 12
numFrames: 4
swfVersion: 6
backgroundColor: #FFFFFF
isActionScript3: false
uncompressedLength: 324496

Expected behavior

What I get from latest Ruffle (2023-02-19) Linux binary:

What Adobe Flash Projector 32 displays:

Affected platform

Desktop app

Operating system

Fedora Linux 37

Browser

Mozilla Firefox 110

Additional information

No response

[ousia]

Sorry, but just in a hurry.

This is what Lighspark outputs, so HTML might be the cause:

[adrian17]

I'm assuming this is about the subscript x_A, right?
This is a tough one - the SWF manually placed the subscript A in a particular point, which doesn't match Ruffle's position of "x" because we simply have a slightly different font-text layout calculation :/ We'll need to get it perfectly pixel-correct in order for the "x" to land right next to the "A".

[ousia]

@adrian17, many thanks for your reply.

Yes, I meant the misplaced A subscript.

I wonder whether using the same default font (once device fonts are implemented [#1862]) would be the relevant gain to consider this issue closed.

Many thanks for your help.