Bug 117214

Summary:

[Win] Font rendering turns jaggy after hardware acceleration

Product:

WebKit

Reporter:

Elaine F <elchao>

Component:

New Bugs

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED INVALID

Severity:

Normal

Priority:

Version:

528+ (Nightly build)

Hardware:

OS:

Windows 7

Attachments:

Description	Flags
Simple bugfile - with CSS Filter (hardware accelerated)	none
Sample - no hardware acceleration	none
Comparison with other major browsers	none
Comparison between hardware accelerated and non-hardware accelerated	none

Elaine F

Reported 2013-06-04 15:59:27 PDT

Created attachment 203733 [details] Simple bugfile - with CSS Filter (hardware accelerated) 1. Open font.html (attached). This file has a single web font with a CSS Filter attached, which forces hardware acceleration 2. Open font-nofilter.html (attached). This file is identical to the first one, which has the CSS Filter removed 3. Edit font.html to remove the CSS Filter and add another CSS reference that will force hardware acceleration, such as translateZ(0). The font is jaggy after the hardware acceleration is turned on. Not reproducible on Mac. Please see attached screen shots - one is a comparison to other major browsers (IE and Firefox) using the same file, and the other is hardware accelerated vs. non hardware accelerated.

Attachments
Simple bugfile - with CSS Filter (hardware accelerated) (524 bytes, text/html) 2013-06-04 15:59 PDT, Elaine F	no flags	Details
Sample - no hardware acceleration (492 bytes, text/html) 2013-06-04 15:59 PDT, Elaine F	no flags	Details
Comparison with other major browsers (90.93 KB, image/png) 2013-06-04 16:00 PDT, Elaine F	no flags	Details
Comparison between hardware accelerated and non-hardware accelerated (5.54 KB, image/png) 2013-06-04 16:05 PDT, Elaine F	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Elaine F

Comment 1 2013-06-04 15:59:56 PDT

Created attachment 203734 [details] Sample - no hardware acceleration

Elaine F

Comment 2 2013-06-04 16:00:33 PDT

Created attachment 203736 [details] Comparison with other major browsers

Elaine F

Comment 3 2013-06-04 16:05:24 PDT

Created attachment 203737 [details] Comparison between hardware accelerated and non-hardware accelerated

Elaine F

Comment 4 2013-06-04 16:06:40 PDT

Tested both on Chrome canary (Version 29.0.1528.2 canary) and Chrome release (Version 27.0.1453.110 m)

Elaine F

Comment 5 2013-06-05 12:04:44 PDT

Moved to the Chromium issue tracker: http://code.google.com/p/chromium/issues/detail?id=247090

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