Bug 296924 – [TextureMapper] plays cubic-bezier CSS animations as linear instead

• Component: WPE WebKit
• Status: RESOLVED FIXED

When playing a CSS animation using cubic-bezier interpolation in wpewebkit 2.48.5 (and all the way back to 2.38.x and possibly earlier), the animation plays in linear instead. Here is an example:


(c) https://loading.io/css/

.lds-ring,
.lds-ring div {
  box-sizing: border-box;
}
.lds-ring {
  display: inline-block;
  position: relative;
  width: 80px;
  height: 80px;
}
.lds-ring div {
  box-sizing: border-box;
  display: block;
  position: absolute;
  width: 64px;
  height: 64px;
  margin: 8px;
  border: 8px solid currentColor;
  border-radius: 50%;
  animation: lds-ring 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
  border-color: currentColor transparent transparent transparent;
}
.lds-ring div:nth-child(1) {
  animation-delay: -0.45s;
}
.lds-ring div:nth-child(2) {
  animation-delay: -0.3s;
}
.lds-ring div:nth-child(3) {
  animation-delay: -0.15s;
}
@keyframes lds-ring {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

[Carlos Garcia Campos]

Pull request: https://github.com/WebKit/WebKit/pull/49003

[EWS]

Committed 298329@main (7d66ab5046b6): <https://commits.webkit.org/298329@main>

Reviewed commits have been landed. Closing PR #49003 and removing active labels.