1272417 - odd scaling behavior in SVG text elements with font-size specified

Status: RESOLVED WORKSFORME

(Core :: SVG, defect)

Description

[spam]

Attachment: font_size.html

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:45.0) Gecko/20100101 Firefox/45.0
Build ID: 20160303134406

Steps to reproduce:

Create an SVG with a text element specifying a font-size.  For the sake of this test, I specified the <svg> width and height attributes to 100%.  But this does not appear to be the cause of the problem.   


Actual results:

As one shrinks the browser window size (which shrinks the viewport), the text inside the <text> elements shrinks as well,  which is expected. However, at some threshold, the text suddenly jumps to a much larger size, before it  begins once again to shrinking.   "

I have attached a sample SVG test file, as well as an animation of the problem.  

NOTE: I did NOT have a minimum font size set.  


Expected results:

The text should not suddenly grow as the viewport shrinks.

Comment 1

[spam]

Attachment: Animation showing the font-size behavior

Comment 2

[spam]

(In reply to spam from comment #0)

> before it  begins once again to shrinking.   "

The above should read:

> before it begins once again to shrink.

Comment 3

[Loic]

I'm not able to reproduce it with FF46 on Win 7.

Comment 4

[spam]

I originally tested this with FF45, but I have updated and tested again with version 46.0.1.  The original behavior persists in this version.  Note that I am on Mac OS X "El Capitan".

Comment 5

[Martin Hejral]

I confirm this bug for FF 48 and less on Mac OS X 

probably related to

https://bugzilla.mozilla.org/show_bug.cgi?id=1199538

by my opinion, I assume that this is just a rounding error, and solutions will be simple

Comment 6

[Martin Hejral]

Attachment: simplified minimal test case

Comment 7

[Martin Hejral]

Attachment: Screen Shot 2016-09-26 at 2.11.21.png

Comment 8

[Martin Hejral]

Attachment: Screen Shot 2016-09-26 at 2.10.39.png

Comment 9

[Martin Hejral]

Attachment: Correct rendering in Webkit

Comment 10

[Marty Schrader]

Attachment: Test HTML and animation showing text resize scaling bug in action on FF 56 64-bit, Win7.

Test HTML and animation showing text resize scaling bug in action on FF 56 64-bit, Win7.

Comment 11

[Robert Longson [:longsonr]]

Seems OK now.