Modifier.drawWithCache()를 통해 컴포저블 뷰를 Bitmap 이미지로 변환하자.md

Modifier.drawWithCache()를 통해 컴포저블 뷰를 Bitmap 이미지로 변환하자

컴포저블 뷰를 Bitmap 이미지로 변환하는 방법

1. Picture 객체 생성

val picture = remember { Picture() }

2. 컴포저블 뷰 영역 지정

Modifier.drawWithCache {
    val width = this.size.width.toInt()
    val height = this.size.height.toInt()
    onDrawWithContent {
        val pictureCanvas =
            androidx.compose.ui.graphics.Canvas(
                receiptPicture.beginRecording(
                    width,
                    height,
                )
            )
        draw(this, this.layoutDirection, pictureCanvas, this.size) {
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        }
        receiptPicture.endRecording()

        drawIntoCanvas { canvas ->
            canvas.nativeCanvas.drawPicture(
                receiptPicture
            )
        }
    }
}

3. Bitmap 변환

picture.toBitmap()