1628965 - large font size becomes blurred

Status: NEW

(Core :: Graphics: WebRender, defect, P5)

Description

[lolipopplus]

simple test case here: https://codepen.io/mmis1000/pen/vYNYwdN

Chrome is tested to work fine.

Comment 1

[lolipopplus]

I thought this is about graph scaling but I was wrong. Setting font-size to a large value (e.g. 2000px) is pretty much same.

Comment 2

[Mayank Bansal]

Happens only with WR enabled. With WR disabled on Win10, the edges are sharp.

Comment 3

[Jessie [:jbonisteel] pls NI]

Lee - can you take a look?

Comment 4

[Jessie [:jbonisteel] pls NI]

(confirmed looks worse with WR)

Comment 5

[Firefox Bug Husbandry Bot]

Resetting severity to default of --.

Comment 6

[Lee Salzman [:lsalzman]]

We currently can't do anything about this till we have some way to render paths in WR. Until then, we just limit the size of glyphs to what will sanely fit in the atlas, which causes blurriness. Marking this as dependent on pathfinder for now.

Comment 7

[Jeff Muizelaar [:jrmuizel]]

We could also draw them with Skia. In the mean time let's postpone until we run into it in the wild.

Comment 8

[Lee Salzman [:lsalzman]]

(In reply to Jeff Muizelaar [:jrmuizel] from comment #7)

We could also draw them with Skia. In the mean time let's postpone until we run into it in the wild.

It's not that we can't render it, in the sense that the font backends (i.e. freetype) are perfectly capable of doing so, it is just the prohibitive amount of texture cache memory each glyph starts taking up. Blob images wouldn't solve this. We'd really need some sort of in-memory compression format, but way better is to just use Pathfinder.