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comparison app/src/main/java/com/bartsent/simpleresizer/lib/getScaledInstance.kt @ 15:20da616dcda0

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Add preferences.
author David Barts <n5jrn@me.com>
date Thu, 18 Feb 2021 22:12:19 -0800
parents b1605be35bcc
children 86740f593b6c
comparison
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14:73beb7c973ae 15:20da616dcda0
1 package com.bartsent.simpleresizer.lib 1 package com.bartsent.simpleresizer.lib
2 2
3 import android.graphics.Bitmap 3 import android.graphics.Bitmap
4 import android.graphics.Canvas
5 import android.graphics.Color
6 import android.graphics.Matrix
7 import kotlin.math.ceil
8 import kotlin.math.floor
9 4
10 private data class IndexWeight(var index: Int, var weight: Double) 5 private data class IndexWeight(var index: Int, var weight: Double)
11 6
7 /**
8 * A quality scaler, rather simpler than Image.getScaledInstance in that it has only
9 * one (slow, high-quality) option.
10 * @param newWidth Width of new bitmap
11 * @param newHeight Height of new bitmap
12 * @return New bitmap
13 */
12 fun Bitmap.getScaledInstance(newWidth: Int, newHeight: Int): Bitmap { 14 fun Bitmap.getScaledInstance(newWidth: Int, newHeight: Int): Bitmap {
13 if (newWidth <= 0) 15 if (newWidth <= 0)
14 throw IllegalArgumentException("invalid width: $newWidth") 16 throw IllegalArgumentException("invalid width: $newWidth")
15 if (newHeight <= 0) 17 if (newHeight <= 0)
16 throw IllegalArgumentException("invalid height: $newHeight") 18 throw IllegalArgumentException("invalid height: $newHeight")
17 if (width == newWidth && height == newHeight) 19 if (width == newWidth && height == newHeight)
18 return Bitmap.createBitmap(this) 20 return this
19 return if (width != newWidth) { 21 return if (width != newWidth) {
20 Resizer.fromBitmap(this).horizontal(newWidth).let { 22 Resizer.fromBitmap(this).horizontal(newWidth).let {
21 if (height == newHeight) it else it.vertical(newHeight) 23 if (height == newHeight) it else it.vertical(newHeight)
22 } 24 }
23 } else { 25 } else {