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ComposePictures/core/src/main/java/com/himanshoe/core/common/CoilImage.kt
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package com.himanshoe.core.common | |
import android.graphics.drawable.Animatable | |
import android.graphics.drawable.Drawable | |
import androidx.annotation.Px | |
import androidx.compose.foundation.Image | |
import androidx.compose.runtime.* | |
import androidx.compose.ui.Modifier | |
import androidx.compose.ui.graphics.ImageAsset | |
import androidx.compose.ui.graphics.asImageAsset | |
import androidx.compose.ui.layout.WithConstraints | |
import androidx.compose.ui.platform.ContextAmbient | |
import androidx.compose.ui.unit.Dp.Companion.Infinity | |
import androidx.compose.ui.unit.IntSize.Companion.Zero | |
import androidx.core.graphics.drawable.toBitmap | |
import androidx.ui.tooling.preview.Preview | |
import coil.Coil | |
import coil.request.ImageRequest | |
import coil.size.Scale | |
import coil.target.Target | |
import kotlinx.coroutines.* | |
@Composable | |
fun CoilImage( | |
model: Any, | |
modifier : Modifier = Modifier, | |
customize: ImageRequest.Builder.() -> Unit = {} | |
) { | |
WithConstraints(modifier) { | |
var width = | |
if (constraints.maxWidth > Zero.width && constraints.maxWidth < Infinity.value.toInt()) { | |
constraints.maxWidth | |
} else { | |
-1 | |
} | |
var height = | |
if (constraints.maxHeight > Zero.height && constraints.maxHeight < Infinity.value.toInt()) { | |
constraints.maxHeight | |
} else { | |
-1 | |
} | |
//if height xor width not able to be determined, make image a square of the determined dimension | |
if (width == -1) width = height | |
if (height == -1) height = width | |
val image = remember { mutableStateOf(ImageAsset(width,height)) } | |
val context = ContextAmbient.current | |
var animationJob : Job? = remember { null } | |
onCommit(model) { | |
val target = object : Target { | |
override fun onStart(placeholder: Drawable?) { | |
placeholder?.apply { | |
animationJob?.cancel() | |
if(height != -1 && width != -1) { | |
animationJob = image.update(this, width, height) | |
} else if (height == -1) { | |
val scaledHeight = intrinsicHeight * (width / intrinsicWidth ) | |
animationJob = image.update(this, width, scaledHeight) | |
} else if (width == -1) { | |
val scaledWidth = intrinsicWidth * (height / intrinsicHeight) | |
animationJob = image.update(this, scaledWidth, height) | |
} | |
} | |
} | |
override fun onSuccess(result: Drawable) { | |
animationJob?.cancel() | |
animationJob = image.update(result) | |
} | |
override fun onError(error: Drawable?) { | |
error?.run { | |
animationJob?.cancel() | |
animationJob = image.update(error) | |
} | |
} | |
} | |
val request = ImageRequest.Builder(context) | |
.data(model) | |
.size(width, height) | |
.scale(Scale.FILL) | |
.apply{customize(this)} | |
.target(target) | |
val requestDisposable = Coil.imageLoader(context).enqueue(request.build()) | |
onDispose { | |
image.value = ImageAsset(width,height) | |
requestDisposable.dispose() | |
animationJob?.cancel() | |
} | |
} | |
Image(modifier = modifier, asset = image.value) | |
} | |
} | |
internal fun MutableState<ImageAsset>.update(drawable: Drawable, @Px width: Int? = null, @Px height: Int? = null) : Job? { | |
if (drawable is Animatable) { | |
(drawable as Animatable).start() | |
return GlobalScope.launch(Dispatchers.Default) { | |
while (true) { | |
val asset = drawable.toBitmap( | |
width = width ?: drawable.intrinsicWidth, | |
height = height ?: drawable.intrinsicHeight) | |
.asImageAsset() | |
withContext(Dispatchers.Main) { | |
value = asset | |
} | |
delay(16) | |
} | |
} | |
} else { | |
value = drawable.toBitmap( | |
width = width ?: drawable.intrinsicWidth, | |
height = height ?: drawable.intrinsicHeight) | |
.asImageAsset() | |
return null | |
} | |
} | |
@Preview | |
@Composable | |
fun ProfilePreview() { | |
CoilImage("https://images.unsplash.com/photo-1601758064224-c3c5ec910095?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1147&q=80") | |
} |