带有for循环的PyQt QImage边框半径

from PyQt5.QtGui import QImage, QPainter, QBrush, QColor

def add_border_radius(image: QImage, radius: int):
    painter = QPainter(image)
    brush = QBrush(QColor(0, 0, 0, 0))  # 透明背景色
    painter.setBrush(brush)
    painter.setPen(Qt.NoPen)  # 不绘制边框线

    for i in range(radius):
        alpha = int(255 * (1 - i / radius))  # 边框透明度渐变
        brush.setColor(QColor(0, 0, 0, alpha))
        painter.setBrush(brush)
        painter.drawRoundedRect(i, i, image.width() - 2 * i, image.height() - 2 * i, radius, radius)

    painter.end()

# 使用示例
image = QImage("image.jpg")  # 加载图像
radius = 10  # 边框半径
add_border_radius(image, radius)  # 对图像边框进行半径处理
image.save("image_with_border.jpg")  # 保存处理后的图像