Different captured image format

[ArcaNO93]

Hello there
Does Roborazzi support capturing\comparing in other formats rather than PNG (i have a particular interest in webp since it is lighter)?
Thanks

[takahirom]

Thanks. We might need to use the lossless format of WebP if we implement it. We should investigate whether it's compatible with platforms like Mac, Windows, and Linux.
For now, you can try using RGB565 for size reduction.

roborazzi/include-build/roborazzi-core/src/commonJvmMain/kotlin/com/github/takahirom/roborazzi/RoborazziOptions.kt

Line 202 in db6faac

Rgb565;

[ArcaNO93]

ok thanks
i guess for now its possible just to convert everything from png to webp before comparing and after recording via custom gradle task

[takahirom]

I am working on this.

[takahirom]

As I expected, handling the WebP format differences could be challenging. We might need to consider using a lossless format.

[ArcaNO93]

yeah id say lossless would do

[takahirom]

I'm considering releasing a feature that allows users to save images in their preferred format. However, there are some challenges. Roborazzi compares a new image with a previously saved one, which means that if the saved image is compressed (e.g., in a format like WebP), image differences might occur, as I mentioned. You can suppress these differences by using high maxDistance values, along with hShift and vShift, to manage this. If you prefer a lossless format, you can provide your own image writer through IIORegistry, a feature in Java, although this approach might be slightly complex.

Another way to address this issue is by offering save BufferedImage and load BufferedImage listeners to users. However, this is a JVM-specific approach, which could be implemented as a platform-specific class within the platform source set like this.

For now, I’m leaning towards implementing the feature that allows users to save images in their preferred format, as I initially mentioned.

[takahirom]

I apologize for frequently changing my opinion 😅. I will support lossless WebP, and you can customize both the image writer and loader as previously mentioned.
#529

[takahirom]

@ArcaNO93 If you have time, could you please review this PR?
#529

[ArcaNO93]

oh, ofc

[ArcaNO93]

left one comment @takahirom