916565 - Rendering issue with perspective WebGL filter by evanw

Status: RESOLVED WORKSFORME

(Core :: Graphics: CanvasWebGL, defect)

Description

[Florian Bender]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:24.0) Gecko/20100101 Firefox/24.0 (Beta/Release)
Build ID: 20130909203154

Steps to reproduce:

1. visit http://evanw.github.io/webgl-filter/
2. click on "perspective" filter


Actual results:

garbled output, faintly reminiscent of a checkerboard around image, rainbow-colored instead of gray-white, stripes


Expected results:

gray-white checkerboard around image


I'm sure the code is not bug free, but the checkerboard should work. Also fails in Nightly 26a (2013-09-14 & 2013-09-15). Works in Chrome 29. 

Graphics (via Nightly)
Device ID	0x 166
GPU Accelerated Windows	1/1 OpenGL (OMTC)
Vendor ID	0x8086
WebGL Renderer	Intel Inc. -- Intel HD Graphics 4000 OpenGL Engine
windowLayerManagerRemote	true
AzureCanvasBackend	quartz
AzureContentBackend	quartz
AzureFallbackCanvasBackend	none
AzureSkiaAccelerated	0

Comment 1

[Florian Bender]

Attachment: screenshot of garbled output

Comment 2

[Loic]

Attachment: screenshot-FF26-Win7.jpg

WFM with FF23/26 on Win 7.

Comment 3

[Kelsey Gilbert [:jgilbert]]

Confirmed on Mac:
Device ID	0x6741
GPU Accelerated Windows	2/2 OpenGL (OMTC)
Vendor ID	0x1002
WebGL Renderer	ATI Technologies Inc. -- ATI Radeon HD 6630M OpenGL Engine