ReactImageView.java 文件源码

@Override
public void process(Bitmap output, Bitmap source) {
  cornerRadii(sComputedCornerRadii);

  output.setHasAlpha(true);
  if (FloatUtil.floatsEqual(sComputedCornerRadii[0], 0f) &&
      FloatUtil.floatsEqual(sComputedCornerRadii[1], 0f) &&
      FloatUtil.floatsEqual(sComputedCornerRadii[2], 0f) &&
      FloatUtil.floatsEqual(sComputedCornerRadii[3], 0f)) {
    super.process(output, source);
    return;
  }
  Paint paint = new Paint();
  paint.setAntiAlias(true);
  paint.setShader(new BitmapShader(source, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));
  Canvas canvas = new Canvas(output);

  float[] radii = new float[8];

  getRadii(source, sComputedCornerRadii, radii);

  Path pathForBorderRadius = new Path();

  pathForBorderRadius.addRoundRect(
      new RectF(0, 0, source.getWidth(), source.getHeight()),
      radii,
      Path.Direction.CW);

  canvas.drawPath(pathForBorderRadius, paint);
}