On Tue, 21 Jan 2025 20:06:55 GMT, Harshitha Onkar <hon...@openjdk.org> wrote:

>> ICC_Profile.setData(..) does validation of the specified tag contents and 
>> throws an exception if it is not valid. But if the tag represents the 
>> header, at least some of the validation is lazy, occurring only when the 
>> data is used, leading to unexpected exceptions at a later time. The check 
>> should be done up-front when the data is set, as in other cases.
>> 
>>  `verifyHeader(byte[] data)`is called when header data is being updated and 
>> the following fields are validated according to the ICC Spec Document. [[1] 
>> Pg#19](https://www.color.org/specification/ICC.1-2022-05.pdf). 
>> 
>> - Profile/Device class
>> - Color Space
>> - Rendering Intent
>> - PCS
>> - Header Size check (ICC Header Size = 128 bytes)
>> 
>> These validation checks are added to ICC_Profile.getInstance(..) & 
>> ICC_Profile.setData(..) methods.
>> 
>> Reference: [1] https://www.color.org/specification/ICC.1-2022-05.pdf
>
> Harshitha Onkar has updated the pull request incrementally with one 
> additional commit since the last revision:
> 
>   Runtime Exception added

src/java.desktop/share/classes/java/awt/color/ICC_Profile.java line 1155:

> 1153:             throw new IllegalArgumentException("Invalid header data");
> 1154:         }
> 1155:         getProfileClass(data);

Can any of these fields have custom values (not covered by java constants 
inside iccCStoJCS) ​​that can still be used for color transformation?

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/23044#discussion_r1927944871

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