想要剪切画布圈的背景图片

Posted 2023-02-25

【中文标题】想要剪切画布圈的背景图片

【英文标题】：Want to Cut background image of canvas circle

【发布时间】：2014-01-03 13:33:56

【问题描述】：

想要剪切画布圆圈的背景图片

canvas.drawBitmap(background_image, 0, 0, null);            
FaceDetector.Face face = faces[0];
tmp_paint.setColor(Color.RED);
`face.getMidPoint(tmp_point);
canvas.drawCircle(tmp_point.x, tmp_point.y, face.eyesDistance(), tmp_paint);

【参考方案1】：

您可以使用以下功能：

public Bitmap getRoundedShape(Bitmap scaleBitmapImage) 
    int targetWidth = 125;
    int targetHeight = 125;

    Bitmap targetBitmap = Bitmap.createBitmap(targetWidth,
            targetHeight, Bitmap.Config.ARGB_8888);

    Canvas canvas = new Canvas(targetBitmap);
    Path path = new Path();
    path.addCircle(
            ((float) targetWidth - 1) / 2,
            ((float) targetHeight - 1) / 2,
            (Math.min(((float) targetWidth), ((float) targetHeight)) / 2),
            Path.Direction.CCW);
    canvas.clipPath(path);
    Bitmap sourceBitmap = scaleBitmapImage;
    canvas.drawBitmap(
            sourceBitmap,
            new Rect(0, 0, sourceBitmap.getWidth(), sourceBitmap.getHeight()), 
            new Rect(0, 0, targetWidth, targetHeight), 
            p);
    return targetBitmap;

更多详情请查看：http://www.androiddevelopersolutions.com/2012/09/crop-image-in-circular-shape-in-android.html

【讨论】：

new Rect(0, 0, sourceBitmap.getWidth(), sourceBitmap .getHeight()), new Rect(0, 0, targetWidth, targetHeight), p)中的“p”是什么；这是一条路吗？？？？？？

p 是绘画的对象