Rive Renderer renders transparent animations incorrectly.
OlegBezr opened this issue · comments
Description
Rive Renderer renders transparent animations incorrectly.
Provide a Repro
minimal iOS SwiftUI app demonstrating the issue:
https://github.com/OlegBezr/RiveTransparentBug
Source .riv/.rev file
RiveRenderer_transparency_bug.zip
Expected behavior
The animation should look the same as in Skia. With RiveRenderer there's a dark gray color in place of transparent color.
Screenshots
Skia (expected animation)
RPReplay_Final1712170003.MP4
Rive Renderer (bug)
RPReplay_Final1712170121.MP4
Device & Versions (please complete the following information)
- Devices tested: physical iPhone 14 Pro Max, simulator iPhone SE 2020
- iOS versions: 17.3.1, 17.2
Additional context
Bug first mentioned here:
#269 (comment)
@HayesGordon, looking forward to your feedback on this. Please let me know if you need anything else to make the bug clear
@HayesGordon, we are still experiencing issues with first app launch animation loading using Skia. Really want to switch to RiveRenderer but this issue blocks us. Please let me know if there are any updates regarding this issue or any way we could contribute more to speed up the resolution. Appreciate your work, thank you!
Hi @OlegBezr, I'll escalate this with the rest of the team. Thanks for following up.
I encounter the same issue as well (see the dark edges on the cloud on top).
I think this is related to premultiplied alpha in texture assets as it only affects bitmaps and not vectorial graphics, and only with Rive's own renderer.
