Support for animated gif images.

Trying to display the following animated gif image displays only the first frame because it supports only the Bitmap.

Image(
     bitmap = imageFromResource("lottie-sample.gif"),
     modifier = Modifier.align(Alignment.BottomCenter).preferredSize(100.dp,100.dp)
)

[Dominaezzz]

Slightly shorter.

import androidx.compose.animation.core.*
import androidx.compose.desktop.Window
import androidx.compose.foundation.Canvas
import androidx.compose.foundation.layout.size
import androidx.compose.runtime.*
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.asImageBitmap
import androidx.compose.ui.unit.dp
import org.jetbrains.skija.*
import java.net.URL

fun main() = Window {
    val codec = remember {
        val bytes = URL(
            "https://raw.githubusercontent.com/JetBrains/skija/ccf303ebcf926e5ef000fc42d1a6b5b7f1e0b2b5/examples/scenes/images/codecs/animated.gif"
        ).readBytes()
        Codec.makeFromData(Data.makeFromBytes(bytes))
    }
    GifAnimation(codec, Modifier.size(100.dp))
}

@Composable
fun GifAnimation(codec: Codec, modifier: Modifier) {
    val transition = rememberInfiniteTransition()
    val frameIndex by transition.animateValue(
        initialValue = 0,
        targetValue = codec.frameCount - 1,
        Int.VectorConverter,
        animationSpec = infiniteRepeatable(
            animation = keyframes {
                durationMillis = 0
                for ((index, frame) in codec.framesInfo.withIndex()) {
                    index at durationMillis
                    durationMillis += frame.duration
                }
            }
        )
    )

    val bitmap = remember { Bitmap().apply { allocPixels(codec.imageInfo) } }
    Canvas(modifier) {
        codec.readPixels(bitmap, frameIndex)
        drawImage(bitmap.asImageBitmap())
    }
}

[Dominaezzz]

This is a sample of naive GIF rendering with compose.

https://gist.github.com/Dominaezzz/cd51f8821162a149ee2a5fb69a702e7f

(Can PR a sample if maintainers are interested)