package com.sw.dualscreen.utils
import android.graphics.Bitmap


object BitmapCropper {
    /**
     * 裁剪Bitmap中心区域为指定尺寸
     * @param original 原始Bitmap
     * @param targetWidth 目标宽度
     * @param targetHeight 目标高度
     * @return 裁剪后的Bitmap
     */
    fun cropCenter(original: Bitmap, targetWidth: Int, targetHeight: Int, offsetX:Int = 0, offsetY:Int = 0): Bitmap {
        val originalWidth = original.width
        val originalHeight = original.height

        // 计算中心点坐标
        var startX = (originalWidth - targetWidth) / 2 + offsetX
        var startY = (originalHeight - targetHeight) / 2 + offsetY

        // 边界检查
        startX = startX.coerceAtLeast(0)
        startY = startY.coerceAtLeast(0)
        val actualWidth = minOf(targetWidth, originalWidth - startX)
        val actualHeight = minOf(targetHeight, originalHeight - startY)

        return Bitmap.createBitmap(original, startX, startY, actualWidth, actualHeight).also {
//            it.setConfig(Bitmap.Config.RGB_565)
//            it.density = DisplayMetrics.DENSITY_LOW
        }
    }
}

// 使用示例
//fun main() {
//    // 假设这是从资源加载的Bitmap
//    val originalBitmap = Bitmap.createBitmap(1000, 1000, Bitmap.Config.ARGB_8888)

//    // 裁剪中心500x500区域
//    val croppedBitmap = BitmapCropper.cropCenter(originalBitmap, 500, 500)
//    println("裁剪后尺寸：${croppedBitmap.width}x${croppedBitmap.height}")
//}