Bug 199770 - Blur Filter causes element to get cut off over multiple screens
Summary: Blur Filter causes element to get cut off over multiple screens
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: CSS (show other bugs)
Version: Other
Hardware: PC Linux
: P2 Minor
Assignee: Nobody
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-07-12 17:39 PDT by Thomas
Modified: 2019-07-14 12:13 PDT (History)
1 user (show)

See Also:


Attachments
Test script displays the bug, uses javascript to generate text (869 bytes, text/html)
2019-07-12 17:39 PDT, Thomas
no flags Details
What happens with the blur enabled (57.12 KB, image/png)
2019-07-12 18:41 PDT, Thomas
no flags Details
What happens with the blur disabled (41.14 KB, image/png)
2019-07-12 18:42 PDT, Thomas
no flags Details
What should happen with blur enabled (from firefox) (59.15 KB, image/png)
2019-07-12 18:42 PDT, Thomas
no flags Details

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Description Thomas 2019-07-12 17:39:47 PDT
Created attachment 374056 [details]
Test script displays the bug, uses javascript to generate text

Overview:
When using the blur filter on an element, it cuts off the element around what I estimate to be ~4000px. When you try to measure it using development tools, it suddenly comes correct.

Steps to reproduce:
1) Stretch out a browser using webkit to span multiple screens
2) Load a file containing a blur filter on an element (see attached one provided)

Actual Results:
The element gets cropped at ~4000px across and no content from the element can be seen anymore past this point, The blur also completes but leaves a hard edge on the edge where it gets cropped

Expected Results: 
The full element, with all contained text should be displayed across the page

Build Date & Hardware:
13 July 2019 on Manjaro Linux 

Additional Builds and Platforms:
 The following both have the problem:
   - lightdm-webkit2-greeter (v2.2.5)
   - Midori (v8.0)
 On Firefox (v67.0 x64) this does not occur
Comment 1 Thomas 2019-07-12 18:41:33 PDT
Created attachment 374063 [details]
What happens with the blur enabled
Comment 2 Thomas 2019-07-12 18:42:02 PDT
Created attachment 374064 [details]
What happens with the blur disabled
Comment 3 Thomas 2019-07-12 18:42:22 PDT
Created attachment 374065 [details]
What should happen with blur enabled (from firefox)