Annotated string with gradient spans is not rendered on skiko targets

[gleb-skobinsky]

Describe the bug Gradients in annotated strings are not rendered.

Affected platforms

• iOS
• Other skiko targets might be affected, too

Versions

• Libraries:
• Compose Multiplatform version: 1.6.10
• Kotlin version: 2.0.0
• OS version(s) (required for Desktop and iOS issues): iOS 17.2
• OS architecture (x86 or arm64): arm64
• Device (model or simulator for iOS issues): iPhone 15

To Reproduce Steps to reproduce the behavior:

1. Run this code snippet:

   @Composable
   @Preview
   fun App() {
   MaterialTheme {
       val annotatedString = remember {
           buildAnnotatedString {
               pushStyle(SpanStyle(fontSize = 56.sp))
               withStyle(SpanStyle(brush = textGradient)) {
                   append("Text with gradient")
               }
               withStyle(SpanStyle(color = Color.Black)) {
                   append(", and without")
               }
           }
       }
       Box(Modifier.fillMaxSize(), Alignment.Center) {
           Text(annotatedString, textAlign = TextAlign.Center, lineHeight = 64.sp)
       }
   }
   }

2. On android the output is ok:

On iOS the span with gradient is not visible:

Expected behavior Same rendering for all platforms.

You can reproduce the issue with this repo: https://github.com/gleb-skobinsky/BugReport

[elijah-semyonov]

Reproduced on all skiko-based targets indeed.

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.