[OpenJDK 2D-Dev] [11] RFR JDK-6574555: PNGImageWriter incorrectly sets bKGD chunk

[Jayathirth D V]

Hi Prahalad,

 

Thanks for the review.

 

I have updated the test case to dispose the image reader.

Please find updated webrev:

http://cr.openjdk.java.net/~jdv/6574555/webrev.02/ 

 

Regards,

Jay

 

From: Prahalad Kumar Narayanan 
Sent: Tuesday, April 17, 2018 11:50 AM
To: Jayathirth D V; Philip Race; 2d-dev
Subject: RE: [OpenJDK 2D-Dev] [11] RFR JDK-6574555: PNGImageWriter incorrectly sets bKGD chunk

 

Hello Jay

 

The changes are fine.

Just a minor observation: The image reader should be disposed in the test case.

 

Thank you

Have a good day

 

Prahalad N.

 

From: Jayathirth D V 
Sent: Friday, April 13, 2018 2:24 PM
To: Philip Race; 2d-dev
Subject: Re: [OpenJDK 2D-Dev] [11] RFR JDK-6574555: PNGImageWriter incorrectly sets bKGD chunk

 

Hi Phil,

 

Thanks for your inputs.

I have modified the test case to use ByteArrayOutput/InputStream.

 

Please find updated webrev for review:

http://cr.openjdk.java.net/~jdv/6574555/webrev.01/ 

 

Regards,

Jay

 

From: Phil Race 
Sent: Wednesday, April 11, 2018 10:40 PM
To: Jayathirth D V; 2d-dev
Subject: Re: [OpenJDK 2D-Dev] [11] RFR JDK-6574555: PNGImageWriter incorrectly sets bKGD chunk

 

The fix seems fine but like the other review I wonder if
the test can use a bytearrayoutputstream instead of writing to a file.

-phil.

On 04/11/2018 03:51 AM, Jayathirth D V wrote:

Hello All,

 

Please review the following fix in JDK11 :

 

Bug : https://bugs.openjdk.java.net/browse/JDK-6574555 

Webrev : HYPERLINK "http://cr.openjdk.java.net/%7Ejdv/6574555/webrev.00/"http://cr.openjdk.java.net/~jdv/6574555/webrev.00/ 

 

Issue: PNGImageWriter. write_bKGD() function sets incorrect R, G, B value when IHDR colortype and bKGD colortype is PNG_COLOR_RGB(A).

 

Solution: Assign values to all channels of RGB as they are present in Metadata instead of using only bKGD red value.

 

Note : Our default metadata doesn't set any bKGD chunk but if user specifies bKGD chunk and uses mergeTree() then we check bKGD  R, G, B values and if r == g == b then we store bKGD chunk as of type PNG_COLOR_GRAY.

 

Thanks,

Jay

 

 
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