pushOpacity method

EngineLayer pushOpacity (int alpha, { Offset offset: Offset.zero })

Pushes an opacity operation onto the operation stack.

The given alpha value is blended into the alpha value of the objects' rasterization. An alpha value of 0 makes the objects entirely invisible. An alpha value of 255 has no effect (i.e., the objects retain the current opacity).

See pop for details about the operation stack.

Implementation 

EngineLayer pushOpacity(int alpha, {Offset offset = Offset.zero}) {
  return _pushOpacity(alpha, offset.dx, offset.dy);
}