43 lines
1.5 KiB
Kotlin
43 lines
1.5 KiB
Kotlin
package com.sw.dualscreen.utils
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import android.graphics.Bitmap
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object BitmapCropper {
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/**
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* 裁剪Bitmap中心区域为指定尺寸
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* @param original 原始Bitmap
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* @param targetWidth 目标宽度
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* @param targetHeight 目标高度
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* @return 裁剪后的Bitmap
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*/
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fun cropCenter(original: Bitmap, targetWidth: Int, targetHeight: Int, offsetX:Int = 0, offsetY:Int = 0): Bitmap {
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val originalWidth = original.width
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val originalHeight = original.height
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// 计算中心点坐标
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var startX = (originalWidth - targetWidth) / 2 + offsetX
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var startY = (originalHeight - targetHeight) / 2 + offsetY
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// 边界检查
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startX = startX.coerceAtLeast(0)
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startY = startY.coerceAtLeast(0)
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val actualWidth = minOf(targetWidth, originalWidth - startX)
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val actualHeight = minOf(targetHeight, originalHeight - startY)
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return Bitmap.createBitmap(original, startX, startY, actualWidth, actualHeight).also {
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// it.setConfig(Bitmap.Config.RGB_565)
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// it.density = DisplayMetrics.DENSITY_LOW
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}
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}
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}
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// 使用示例
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//fun main() {
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// // 假设这是从资源加载的Bitmap
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// val originalBitmap = Bitmap.createBitmap(1000, 1000, Bitmap.Config.ARGB_8888)
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// // 裁剪中心500x500区域
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// val croppedBitmap = BitmapCropper.cropCenter(originalBitmap, 500, 500)
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// println("裁剪后尺寸：${croppedBitmap.width}x${croppedBitmap.height}")
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//}
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