Mercurial > cgi-bin > hgweb.cgi > SimpleResizer
view app/src/main/java/com/bartsent/simpleresizer/lib/getScaledInstance.kt @ 17:86740f593b6c
Better memoization, more rational API.
author | David Barts <n5jrn@me.com> |
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date | Sun, 21 Feb 2021 22:14:07 -0800 |
parents | 20da616dcda0 |
children | 19c584b29679 |
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package com.bartsent.simpleresizer.lib import android.graphics.Bitmap /** * A quality scaler, rather simpler than Image.getScaledInstance in that it has only * one (slow, high-quality) option. * @param newWidth Width of new bitmap * @param newHeight Height of new bitmap * @return New bitmap */ fun Bitmap.getScaledInstance(newWidth: Int, newHeight: Int, kernel: ScalingKernel = LanczosKernel()): Bitmap { if (newWidth <= 0) throw IllegalArgumentException("invalid width: $newWidth") if (newHeight <= 0) throw IllegalArgumentException("invalid height: $newHeight") if (width == newWidth && height == newHeight) return this return if (width != newWidth) { Resizer.fromBitmap(this).horizontal(newWidth, kernel).let { if (height == newHeight) it else it.vertical(newHeight, kernel) } } else { Resizer.fromBitmap(this).vertical(newHeight, kernel) } .toBitmap() }