RxSwipeCaptcha.java 文件源码

private Bitmap getMaskBitmap(Bitmap mBitmap, Path mask) {
        //以控件宽高 create一块bitmap
        Bitmap tempBitmap = Bitmap.createBitmap(mWidth, mHeight, Bitmap.Config.ARGB_8888);
        Log.e(TAG, " getMaskBitmap: width:" + mBitmap.getWidth() + ",  height:" + mBitmap.getHeight());
        Log.e(TAG, " View: width:" + mWidth + ",  height:" + mHeight);
        //把创建的bitmap作为画板
        Canvas mCanvas = new Canvas(tempBitmap);
        //有锯齿 且无法解决,所以换成XFermode的方法做
        //mCanvas.clipPath(mask);
        // 抗锯齿
        mCanvas.setDrawFilter(new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG));
        //绘制用于遮罩的圆形
        mCanvas.drawPath(mask, mMaskPaint);
        //设置遮罩模式(图像混合模式)
        mMaskPaint.setXfermode(mPorterDuffXfermode);
//        mMaskPaint.setShadowLayer(5, 3, 3, 0xFF0000FF);

        // 设置光源的方向
        float[] direction = new float[]{ 1, 1, 1 };
//设置环境光亮度
        float light = 1f;
// 选择要应用的反射等级
        float specular = 6;
// 向mask应用一定级别的模糊
        float blur = 3.5f;
//        EmbossMaskFilter emboss=new EmbossMaskFilter(direction,light,specular,blur);
        BlurMaskFilter maskFilter = new BlurMaskFilter(10, BlurMaskFilter.Blur.SOLID);
// 应用mask
        mMaskPaint.setMaskFilter(maskFilter);

        //★考虑到scaleType等因素，要用Matrix对Bitmap进行缩放
        mCanvas.drawBitmap(mBitmap, getImageMatrix(), mMaskPaint);
        mMaskPaint.setXfermode(null);
        return tempBitmap;
    }