1228750 - globalCompositeOperation is broken when using drawImage()

Status: RESOLVED DUPLICATE of bug 1567544

(Core :: Graphics: Canvas2D, defect, P3)

Description

[dreamless113]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.93 Safari/537.36

Steps to reproduce:

Please see this test: http://www.evanburke.com/new.html

1. I drew an image to the canvas.
2. I set the globalCompositeOperation equal to 'destination-out'
3. I tried drawing subsequent images to the canvas that should have been displayed using 'destination-out' as the composite mode.


Actual results:

'destination-out' is completely ignored, as are other composite modes.

The SVG image is drawn to canvas ontop of the existing image as if the globalCompositeOperation was set to 'source-atop' (the default)


Expected results:

globalCompositeOperation should not be ignored and should "erase" part of the image if using 'destination-out'

Chrome Version 45.0.2454.93 [OK]
Safari 5.1.7 [OK]
Internet Explorer 11.0.9600 [OK]
Firefox 42 [BROKEN]

Comment 1

[Gingerbread Man]

Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0
20151128030230

Comment 2

[Jonathan Watt [:jwatt]]

Mass bug change to replace various 'parity' whiteboard flags with the new canonical keywords. (See bug 1443764 comment 13.)

Comment 3

[will.geek]

Attachment: demonstration.html

As the original reporter's test link is dead, I've attached an HTML file demonstrating the bug, which still exists in Fx 72.0a1 (build 20191111100226).

Comment 4

[Tooru Fujisawa [:arai]]

closing as duplicate of bug 1567544, that has better info.