Class CachedBitmap

valdi/src/java/com/snap/valdi/utils/BitmapPool.kt:36–85

    }

    private class CachedBitmap(private val pool: BitmapPool, private var bitmap: Bitmap?): BitmapHandler {

        private val retainCount = AtomicInteger(1)

        var expirationTime = 0L

        private var isDirty = true

        val isUnused: Boolean
            get() = retainCount.get() == 0

        override fun getBitmap(): Bitmap {
            return bitmap!!
        }

        fun prepareForReuse() {
            synchronized(this) {
                if (!isDirty) {
                    return
                }

                isDirty = false
                bitmap?.eraseColor(Color.TRANSPARENT)
            }
        }

        fun markDirty() {
            synchronized(this) {
                isDirty = true
            }
        }

        fun destroy() {
            synchronized(this) {
                bitmap?.recycle()
                bitmap = null
            }
        }

        override fun retain() {
            retainCount.incrementAndGet()
        }

        override fun release() {
            val newValue = retainCount.decrementAndGet()
            if (newValue == 0) {
                pool.onBitmapUnused(this)
            }
        }
    }

    /**
     * Returns a bitmap with the desired width and height.