1081148 - Anisotropic filtering leads to rendering issues

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect)

Description

[nucrap]

Attachment: Testcase - will be very blurry with anitrosophic filtering 4x upwards

This bugreport aims to wrap up multiple issues all resulting from the same cause.

Enabling anitrosophic filtering (from 4x on) in the graphics driver - no matter if nvidia, amd or intel, leads to blurry rendering in certain situations.

For example CSS triangle rendering is severely affected: At x4 Anisotropic filtering we get a blurry triangle, and at 16x it often ends up being a blurry mess.

I have uploaded multiple attachments illustrating this issue.

Comment 1

[Jeff Muizelaar [:jrmuizel]]

Is Internet Explorer affected?

Comment 2

[nucrap]

Attachment: Blurry arrow in bugzilla

Comment 3

[nucrap]

Attachment: Blurry arrow on GitHub

Comment 4

[nucrap]

Attachment: Blurry arrow on YoutTube

Comment 5

[nucrap]

IE and Chrome are not affected.
Disabling HW accel is a valid workaround too of course.

Comment 6

[nucrap]

Attachment: Testcase - Right edge will appear blurry with AF 4x +

Comment 7

[Loic]

(In reply to nucrap from comment #5)
> Disabling HW accel is a valid workaround too of course.

To fix only this issue, it's not. HWA is useful for many things and disabling HWA hurts the perf of the browser in many ways.

Comment 8

[Jeff Muizelaar [:jrmuizel]]

I wonder how IE avoids being impacted...

Comment 9

[nucrap]

(In reply to Loic from comment #7)
> To fix only this issue, it's not. HWA is useful for many things and
> disabling HWA hurts the perf of the browser in many ways.

Yeah sure it is, that's why I called it a *workaround*. Just wanted to point out that this is indeed a behaviour that firefox permits.

> I wonder how IE avoids being impacted...

What about Chrome? I guess it uses HW accel too and isn't affected...

Comment 10

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

Can you still reproduce the issue?

Comment 11

[nucrap]

Cannot reproduce this anymore with my AMD r7 260x graohics card, using Radeon Drivers 16.3.2.
Some NVIDIA and Intel users should try to reproduce, too, since these were affected as well.

Comment 12

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

WFM on NVIDIA, so closing