Canvas

Common
```kotlin @Composable fun Canvas(modifier: Modifier, onDraw: DrawScope.() -> Unit) = Spacer(modifier.drawBehind(onDraw)) ``` Component that allow you to specify an area on the screen and perform canvas drawing on this area. You MUST specify size with modifier, whether with exact sizes via [androidx.compose.foundation.layout.size] modifier, or relative to parent, via [androidx.compose.foundation.layout.fillMaxSize], [ColumnScope.weight], etc. If parent wraps this child, only exact sizes must be specified. #### Parameters | | | | --- | --- | | modifier | mandatory modifier to specify size strategy for this composable | | onDraw | lambda that will be called to perform drawing. Note that this lambda will be called during draw stage, you have no access to composition scope, meaning that [Composable](/jetpack-compose/androidx.compose.runtime/runtime/classes/Composable) function invocation inside it will result to runtime exception |

Canvas

Common
```kotlin @Composable fun Canvas(modifier: Modifier, contentDescription: String, onDraw: DrawScope.() -> Unit) = Spacer(modifier.drawBehind(onDraw).semantics { this.contentDescription = contentDescription }) ``` Component that allow you to specify an area on the screen and perform canvas drawing on this area. You MUST specify size with modifier, whether with exact sizes via [androidx.compose.foundation.layout.size] modifier, or relative to parent, via [androidx.compose.foundation.layout.fillMaxSize], [ColumnScope.weight], etc. If parent wraps this child, only exact sizes must be specified. #### Parameters | | | | --- | --- | | modifier | mandatory modifier to specify size strategy for this composable | | contentDescription | text used by accessibility services to describe what this canvas represents. This should be provided unless the canvas is used for decorative purposes or as part of a larger entity already described in some other way. This text should be localized, such as by using [androidx.compose.ui.res.stringResource] | | onDraw | lambda that will be called to perform drawing. Note that this lambda will be called during draw stage, you have no access to composition scope, meaning that [Composable](/jetpack-compose/androidx.compose.runtime/runtime/classes/Composable) function invocation inside it will result to runtime exception |