将指定的不透明度设置推送到绘图上下文上。

Pushes the specified opacity setting onto the drawing context.

youdao

将指定的不透明度设置推送到绘图上下文上，并应用指定的动画时钟。

Pushes the specified opacity setting onto the drawing context and applies the specified animation clock.

youdao

首先，cairo有一个绘图上下文(drawing context)，这相当于画家的画布。

First and foremost, Cairo has a drawing context, akin to the drawing motions performed on the painter's canvas from the earlier analogy.

youdao

首先，cairo有一个绘图上下文(drawing context)，这相当于画家的画布。

First and foremost, Cairo has a drawing context, akin to the drawing motions performed on the painter's canvas from the earlier analogy.

youdao