package com.pitchedapps.frost.glide

import android.graphics.*
import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool
import com.bumptech.glide.load.resource.bitmap.BitmapTransformation
import com.pitchedapps.frost.utils.Prefs
import java.security.MessageDigest


/**
 * Created by Allan Wang on 27/12/17.
 */
class RoundCornerTransformation : BitmapTransformation() {

    override fun updateDiskCacheKey(messageDigest: MessageDigest) {
        messageDigest.update("FrostRoundCornerTransform-${Prefs.showRoundedIcons}".toByteArray())
    }

    override fun transform(pool: BitmapPool, toTransform: Bitmap, outWidth: Int, outHeight: Int): Bitmap {

        val width = toTransform.width
        val height = toTransform.height

        val bitmap = pool.get(width, height, Bitmap.Config.ARGB_8888)
        bitmap.setHasAlpha(true)

        val radius = Math.min(width, height).toFloat() /
                (if (Prefs.showRoundedIcons) 2f else 10f)

        val canvas = Canvas(bitmap)
        val paint = Paint()
        paint.isAntiAlias = true
        paint.shader = BitmapShader(toTransform, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP)
        canvas.drawRoundRect(RectF(0f, 0f, width.toFloat(), height.toFloat()),
                radius, radius, paint)

        return bitmap
    }


}