1305013 - Bookmarks panel text is fuzzy

Status: RESOLVED DUPLICATE of bug 1303570

(Core :: Graphics: Text, defect)

Description

[Gian-Carlo Pascutto [:gcp]]

Attachment: fuzzytext.png

Nightly, Windows 10 Anniversary edition, AMD Radeon R9 390, Crimson 16.9.2 drivers.

The text in the bookmarks menu/panel, when it folds out, looks fuzzy and heard to read. It looks as if the text is anti-aliased and such, but positioned a fraction of a pixel off of the correct grid.

This is regression, Firefox 47.0.1 (which claims it's current?!) renders the text normally. Happens on different profiles.

Comment 1

[Jonathan Kew [:jfkthame]]

(Is the Platform field here wrong? It doesn't correspond to what comment 0 says.)

The screenshot shows the text rendered with grayscale only, rather than subpixel antialiasing (ClearType). Guessing that it used to be ClearType?

Actually, it kinda looks like the glyphs may have been rasterized for ClearType but then the colored bitmaps were rendered (composited?) as grayscale at some stage. That kind of mismatch tends to result in serious fuzziness...

Maybe related to the switch to skia?

Comment 2

[Gian-Carlo Pascutto [:gcp]]

Graphics
Features
Compositing	Direct3D 11
Asynchronous Pan/Zoom	wheel input enabled; touch input enabled
WebGL Renderer	Google Inc. -- ANGLE (AMD Radeon (TM) R9 390 Series Direct3D11 vs_5_0 ps_5_0)
WebGL2 Renderer	Google Inc. -- ANGLE (AMD Radeon (TM) R9 390 Series Direct3D11 vs_5_0 ps_5_0)
Hardware H264 Decoding	No; Hardware video decoding disabled or blacklisted
Audio Backend	wasapi
Direct2D	true
DirectWrite	true (10.0.14393.0)
GPU #1
Active	Yes
Description	AMD Radeon (TM) R9 390 Series
Vendor ID	0x1002
Device ID	0x67b1
Driver Version	21.19.137.1
Driver Date	9-16-2016
Drivers	aticfx64 aticfx64 aticfx64 amdxc64 aticfx32 aticfx32 aticfx32 amdxc32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64
Subsys ID	20151462
RAM	8192
GPU #2
Active	No
Description	Intel(R) HD Graphics 530
Vendor ID	0x8086
Device ID	0x1912
Driver Version	20.19.15.4474
Driver Date	6-13-2016
Drivers	igdumdim64 igd10iumd64 igd10iumd64 igd12umd64 igdumdim32 igd10iumd32 igd10iumd32 igd12umd32
Subsys ID	0000000c
RAM	Unknown
Diagnostics
ClearType Parameters	Gamma: 2,2 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 100
AzureCanvasAccelerated	0
AzureCanvasBackend	direct2d 1.1
AzureContentBackend	direct2d 1.1
AzureFallbackCanvasBackend	cairo
ClearType Parameters	Gamma: 2,2 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 100

Comment 3

[Gian-Carlo Pascutto [:gcp]]

Also, I'm on a 27" 1440p screen, with text scaling at 125%.

If I look at the image attachment here, then because of the up-scaling it actually look OK. On the monitor it's terrible due to the apparent misalignment. 

I asked a friend that I know has an NVIDIA card to check the bookmarks menu, and he reported (without me prompting) "it has no cleartype and it doesn't respect the pixel grid". 

So it shouldn't be related to drivers.

Comment 4

[Gian-Carlo Pascutto [:gcp]]

(In reply to Jonathan Kew (:jfkthame) from comment #1)
> Maybe related to the switch to skia?

Changing 

gfx.canvas.azure.backends;direct2d1.1,skia,cairo
or
gfx.content.azure.backends;direct2d1.1,cairo

To add/remove skia respectively, doesn't seem to have any effect.

In fact, because the skia change got backed out yesterday, I think my build doesn't have https://hg.mozilla.org/mozilla-central/rev/729307f6ac59

yet. As you can see above it's not listed in content.azure.backends by default.

Comment 5

[Gian-Carlo Pascutto [:gcp]]

Bisected to:

4:11.30 INFO: Last good revision: 6c5d6fdd301002aeb12974a223303324af9a9823
 4:11.31 INFO: First bad revision: b071166a07bc058e9cbaa12cd8ebf48c12a75d0f
 4:11.31 INFO: Pushlog:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=6c5d6fdd301002aeb12974a223303324af9a9823&tochange=b071166a07bc058e9cbaa12cd8ebf48c12a75d0f

Which looks bloody likely!