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annotate app/src/main/java/com/bartsent/simpleresizer/lib/getScaledInstance.kt @ 7:9374d044a132 concur

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Concurrency attempt, NOT WORKING.
author David Barts <n5jrn@me.com>
date Wed, 17 Feb 2021 07:24:26 -0800
parents e8059b166de1
children 884092efe31a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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6
e8059b166de1 Lanczos works, but is painfully slow.
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1 package com.bartsent.simpleresizer.lib
e8059b166de1 Lanczos works, but is painfully slow.
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2
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3 import android.graphics.Bitmap
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4 import android.graphics.Canvas
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5 import android.graphics.Matrix
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6
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7 private data class IndexWeight(var index: Int, var weight: Double)
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8
e8059b166de1 Lanczos works, but is painfully slow.
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9 fun Bitmap.getScaledInstance(newWidth: Int, newHeight: Int, kernel: ScalingKernel = LanczosKernel): Bitmap {
e8059b166de1 Lanczos works, but is painfully slow.
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10 if (newWidth <= 0)
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11 throw IllegalArgumentException("invalid width: $newWidth")
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12 if (newHeight <= 0)
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13 throw IllegalArgumentException("invalid height: $newHeight")
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14 if (width == newWidth && height == newHeight)
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15 return Bitmap.createBitmap(this)
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16 val input = if (config == Bitmap.Config.ARGB_8888)
e8059b166de1 Lanczos works, but is painfully slow.
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17 this
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18 else {
e8059b166de1 Lanczos works, but is painfully slow.
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19 Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888).also {
e8059b166de1 Lanczos works, but is painfully slow.
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20 Canvas(it).drawBitmap(this, Matrix(), null)
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21 }
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22 }
7
9374d044a132 Concurrency attempt, NOT WORKING.
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23 Resizer().use { resize ->
9374d044a132 Concurrency attempt, NOT WORKING.
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24 if (width != newWidth) {
9374d044a132 Concurrency attempt, NOT WORKING.
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25 if (height != newHeight)
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26 return resize.vertical(resize.horizontal(input, newWidth, kernel), newHeight, kernel)
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27 else
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28 return resize.horizontal(input, newWidth, kernel)
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29 } else {
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30 return resize.vertical(input, newHeight, kernel)
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31 }
6
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32 }
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33 }