我可以得出一个Android画布的边界之外 [英] Can I draw outside the bounds of an Android Canvas

问题描述

我移植写在允许拉发生剪切矩形的边界之外的图形环境的应用程序。没有办法做到这在Android中？

I'm porting an app written in a graphics environment that allows drawing to happen outside the bounds of the clipping rectangle. Any way to do this in Android?

推荐答案

要绘制的边界之外，则需要扩展画布的CLI $ P $厘。

To draw outside the bounds, you need to expand the clipRect of the canvas.

退房超载CLI preCT方式对Canvas类。

Check out the overloaded clipRect methods on the Canvas class.

请注意 - 您将需要指定的区域操作，因为默认操作是相交。因此，像这样：

Note - You will need to specify the Region operation because the default operation is INTERSECT. So something like this:

Rect newRect = canvas.getClipBounds();
newRect.inset(-5, -5)  //make the rect larger

canvas.clipRect (newRect, Region.Op.REPLACE);
//happily draw outside the bound now

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