image/png: support interlacing

[gopherbot]

by sinni800:

What steps will reproduce the problem?
If possible, include a link to a program on play.golang.org.
1. http://play.golang.org/p/5lY2fRrLt6
2. Download the attachment png
3. Modify the variable "source" so it points to the png
4. Run

What is the expected output?

Nil error, the image is decoded

What do you see instead?

err: unsupported feature: compression, filter or interlace method

Which compiler are you using (5g, 6g, 8g, gccgo)?

6g, 8g

Which operating system are you using?

Windows, Linux

Which version are you using?  (run 'go version')

Tested on tip and 1.1.2

Please provide any additional information below.

Sorry for the image, being a comic. I will gladly accept an image that has the same
unsupported feature as replacement.

Attachments:

1. sameshirt.png (20062 bytes)

[gopherbot]

Comment 1 by sinni800:

The image is interlaced, so the issue is actually:
Feature request image/png: interlaced images

[robpike]

Comment 2:

Labels changed: added priority-later, removed priority-triage.

Status changed to Accepted.

[rsc]

Comment 3:

Labels changed: added go1.3maybe.

[rsc]

Comment 4:

Labels changed: added release-none, removed go1.3maybe.

[rsc]

Comment 5:

Labels changed: added repo-main.

[gopherbot]

Comment 6:

CL https://golang.org/cl/102130044 mentions this issue.

[dsymonds]

Comment 7:

This issue was closed by revision 5c2f01f.

Status changed to Fixed.

[gopherbot]

Comment 8 by drew.wells00:

When will this fix find itself into a release?

[ianlancetaylor]

Comment 9:

The fix will be in the 1.4 release, scheduled to occur on December 1.  You can download
1.4 betas for testing right now, as seen on the golang-dev mailing list.