468237 - SVG image using a font specified via @font-face doesn't use the font after it loads

Status: RESOLVED FIXED

(Core :: Layout: Text and Fonts, defect)

Description

[Alex]

User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5; en-US; rv:1.9.2a1pre) Gecko/20081206 Minefield/3.2a1pre
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5; en-US; rv:1.9.2a1pre) Gecko/20081206 Minefield/3.2a1pre

When a SVG file references a font via a @font-face rule, Firefox downloads the font but doesn't refresh the document to use it (it keeps using the fallback font), you have to zoom in or out a step to get the document to use the font.

Even if the document can't be zoomed, zooming is still required to get the fonts to show.

Reproducible: Always

Steps to Reproduce:
1. Load image in URL field
2. Observe the 4 X's taken from the fallback font
3. Zoom in or out a single step
4. Observe the 4 X's turn into characters from the Ahem font.
Actual Results:  
Image refreshes to use linked font after zooming

Expected Results:  
Should refresh when the font finishes loaded, not after zooming.

Comment 1

[David Baron :dbaron:]

Attachment: copy of testcase (requires downloading and setting up with Ahem.ttf)

I made a copy of the testcase that still ought to work if you have Ahem installed locally at http://dbaron.org/tmp/reftest/Ahem.svg .  I'm attaching it as well (although without a copy of the font).

This bug seems to be fixed by the patch in bug 458878, although I'm actually not sure why at first glance.

Comment 2

[Aharon]

I created a test page for SVG 1.1 files using CSS to display @font-face referenced fonts within an image. The SVG file is rendered next to a reference image. A number of browsers were tested to see how they perform. In my latest testing, Firefox 11.0a1 (Nightly 2011-12-09) does not display the font correctly within the SVG file.

See
http://aharon.varady.net/browser-test/browser-test-for-hebrew-diacritics-test3.html

Comment 3

[Aharon]

(In reply to Aharon from comment #2)
> I created a test page for SVG 1.1 files using CSS to display @font-face
> referenced fonts within an image. The SVG file is rendered next to a
> reference image. A number of browsers were tested to see how they perform.
> In my latest testing, Firefox 11.0a1 (Nightly 2011-12-09) does not display
> the font correctly within the SVG file.
> 
> See
> http://aharon.varady.net/browser-test/browser-test-for-hebrew-diacritics-
> test3.html

In particular, the fonts tested are Unicode Hebrew fonts, so this test also is a test of BIDI RTL (bidirectional right-to-left) text.

Comment 4

[Robert Longson [:longsonr]]

Works now that svgtext is enabled.