307022 - globalCompositeOperation options source-in, source-out, destination-in, etc. render incorrectly

Status: RESOLVED INVALID

(Core :: Graphics: Canvas2D, defect)

Description

[Kamiel Martinet]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) Gecko/20050903 Firefox/1.0+
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) Gecko/20050903 Firefox/1.0+

As far is I can tell the branch build does not render the following options
correctly:
- source-in
- source-out
- source-over
- destination-in
- destination-atop
- darker
- copy

Reproducible: Always

Steps to Reproduce:
1. See the testcase
2.
3.

Actual Results:  
Look at the screenshot with my results

Expected Results:  
See the intended result screenshot

Comment 1

[Kamiel Martinet]

Attachment: Testcase

My testcase

Comment 2

[Kamiel Martinet]

Attachment: My rsults

My results with the following branch build: Mozilla/5.0 (Windows; U; Windows NT
5.1; en-US; rv:1.8b4) Gecko/20050903 Firefox/1.0+

Comment 3

[Kamiel Martinet]

Attachment: Intended result

I think this should be the intended result. (ignoring the anti-aliasing
offcourse)

Comment 4

[Adam Guthrie]

Attachment: comparison of testcase on Linux and Windows

I'm not seeing the same thing as you showed in your screenshot, but I am seeing
the anti-aliasing differences on Linux and Windows. (Screenshots were taken on
today's trunk builds.)

Comment 5

[Kamiel Martinet]

Adam,

This was tested on the branch build not the trunk. The trunk build performs much
better than the branch build but still isn't perfect. see bug 307021.

Comment 6

[Kamiel Martinet]

Just tested this on the 1.5 beta 1 build and I still get the same results.

Comment 7

[(not currently active) Ted Mielczarek]

1.5 is unsupported.

Comment 8

[Kamiel Martinet]

Attachment: Firefox 3 (windows xp) test results

This is the results I get with the current Firefox 3 on windows xp: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9) Gecko/2008052906 Firefox/3.0

Comment 9

[Kamiel Martinet]

Ted, This bug may be reported almost 3 years ago but it still exists in the current firefox 3: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9) Gecko/2008052906 Firefox/3.0.

It also looks like this is mostly a Windows problem. In ubuntu only darker doesn't seem to work.

Comment 10

[(not currently active) Ted Mielczarek]

copy is bug 366283, and darker is bug 307021. I don't think this testcase is actually correct. The testcase here: http://developer.mozilla.org/samples/canvas-tutorial/6_1_canvas_composite.html shows everything but copy and darker looking correct for me on Windows XP.

Comment 11

[(not currently active) Ted Mielczarek]

I'm not a canvas expert, but I think this testcase is broken.

Comment 12

[Kamiel Martinet]

Your right the testcase is broken it's missing a beginpath statement which makes it behave strangly. The testcase I made for the tutorial is, as you point out, behaving correctly except for darker and copy.

Comment 13

[Kamiel Martinet]

Attachment: Testcase

Removed a script error from the testcase.

Comment 14

[Kamiel Martinet]

Attachment: Firefox 3 (windows xp) test results

updated with results for the new testcase

Comment 15

[(not currently active) Ted Mielczarek]

Can we then resolve this as INVALID or dupe to one of those other bugs I mentioned, since it looks like everything else is working?

Comment 16

[Kamiel Martinet]

Agreed