Bug 181129

Summary:

SVG filter result fuzzy

Product:

WebKit

Reporter:

Peter Holbein Kapoun <webkit.20.phk>

Component:

SVG

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED INVALID

Severity:

Normal

CC:

dino, simon.fraser, zimmermann

Priority:

Version:

WebKit Nightly Build

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Test Case	none
Safari result	none
Chrome result	none
Firefox result	none

Peter Holbein Kapoun

Reported 2017-12-22 09:49:43 PST

Created attachment 330126 [details] Test Case Under some circumstances a filter with some merging using <feMerge> unexpectedly causes the result to look like a blown-up low-resolution image, see for example the attached example and see how it is Safari compared to the other browsers (attached screenshots). See also https://stackoverflow.com/q/47942581/2261442 and "Example 3" from https://bl.ocks.org/Herst/raw/d5db2d3d1ea51a8ab8740e22ebaa16aa/

Attachments
Test Case (710 bytes, text/html) 2017-12-22 09:49 PST, Peter Holbein Kapoun	no flags	Details
Safari result (3.56 KB, image/png) 2017-12-22 09:50 PST, Peter Holbein Kapoun	no flags	Details
Chrome result (721 bytes, image/png) 2017-12-22 09:50 PST, Peter Holbein Kapoun	no flags	Details
Firefox result (710 bytes, image/png) 2017-12-22 09:50 PST, Peter Holbein Kapoun	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Peter Holbein Kapoun

Comment 1 2017-12-22 09:50:15 PST

Created attachment 330128 [details] Safari result

Peter Holbein Kapoun

Comment 2 2017-12-22 09:50:27 PST

Created attachment 330129 [details] Chrome result

Peter Holbein Kapoun

Comment 3 2017-12-22 09:50:40 PST

Created attachment 330130 [details] Firefox result

Peter Holbein Kapoun

Comment 4 2017-12-22 12:10:24 PST

My bad. It's not a bug but a feature. Webkit is apparently trying to combat possible DoSing using huge SVG filters and I screwed up my size declaration, see https://stackoverflow.com/a/47946201/2261442 Good feature actually. 👍

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