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Picasso circle transformation by kotlin
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| import android.graphics.* | |
| import com.squareup.picasso.Transformation | |
| // https://gist.github.com/codezjx/b8a99374385a0210edb9192bced516a3 | |
| class CircleTransformation: Transformation { | |
| companion object { | |
| private val KEY = "circleImageTransformation" | |
| } | |
| override fun transform(source: Bitmap): Bitmap { | |
| val minEdge = Math.min(source.width, source.height) | |
| val dx = (source.width - minEdge) / 2 | |
| val dy = (source.height - minEdge) / 2 | |
| // Init shader | |
| val shader = BitmapShader(source, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP) | |
| val matrix = Matrix() | |
| matrix.setTranslate((-dx).toFloat(), (-dy).toFloat()) // Move the target area to center of the source bitmap | |
| shader.setLocalMatrix(matrix) | |
| // Init paint | |
| val paint = Paint(Paint.ANTI_ALIAS_FLAG) | |
| paint.shader = shader | |
| // Create and draw circle bitmap | |
| val output = Bitmap.createBitmap(minEdge, minEdge, source.config) | |
| val canvas = Canvas(output) | |
| canvas.drawOval(RectF(0f, 0f, minEdge.toFloat(), minEdge.toFloat()), paint) | |
| source.recycle() | |
| return output | |
| } | |
| override fun key(): String = KEY | |
| } |
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