Android Kotlin Graphics Utility.

Kotlin graphics util

// python numpy の処理をRectに適用できても面白いかも。

// TODO:
// fun RectF().toInt(): Rect
// fun Rect().toFloat(): RectF
// fun Rect.scaleCenter(scaleX: Float, scaleY: Float): RectF
// fun Rect.scaleCenter(scaleXY: Float): RectF

/// Scale X and Y separately.
fun Rect.scale(scaleX: Float, scaleY): RectF
  = Rect(
    left * scaleX, 
    top * scaleY, 
    right * scaleX, 
    bottom * scaleY
   )

// Scale with same scale factor.
fun Rect.scale(scaleXY: Float): RectF
  = scale(scaleXY, scaleXY)