Add equal feedback in createDiff.

[RamzesTheSecond]

It would be great to know if the images are equal or not when creating diff.

looksSame.createDiff({ ... }, function (error, equal) { ... });

[DudaGod]

Hello.

Can you please describe a use case of this feature? It is assumed that you need compare images at first and than if they have difference call createDiff method.

Example:

looksSame('ref.png', 'curr.png', (err, equal) => {
  if (!equal) {
    looksSame.createDiff({...}, () => {...})
  }
})

[RamzesTheSecond]

Yes sure. I need to create a diff image regardless if it has differences or not. I use it for e2e tests and there are scenarios with steps where each step should be visible and additionally I want to show which steps have some difference.

[DudaGod]

Okay, you can do it like I described above:

looksSame('ref.png', 'curr.png', (err, equal) => {
    looksSame.createDiff({...}, () => {...});

    console.log(`Images are equal: ${equal}`);
})

Is it suitable for you?

[RamzesTheSecond]

Thanks for the answer. Unfortunately it's not the option I need - it simply takes more time to compare images and generate diff. In this case it will take longer than expected. I have loads of scenarios and images to compare.

[DudaGod]

Ok, I understand you. We are currently busy with other tasks so the PR is welcome. By the way, this is not difficult to do.

[kspace-trk]

@DudaGod Hello. I have created a Pull Request regarding this issue, could you please take a look at it? https://github.com/gemini-testing/looks-same/pull/94

[DudaGod]

@DudaGod Hello. I have created a Pull Request regarding this issue, could you please take a look at it?

Hello. Did you try to use lookSame with option createDiffImage: true? In this case the execution speed should be the same as when calling createDiff.

You can use it like:

const {equal} = await looksSame('image1.png', 'image2.png', {createDiffImage: true});