[C#]	public void validateViewPort();
[VB]	Public Sub validateViewPort()

Ensures the viewport left, top, width and height are within valid ranges and adjusts them if necessary.

The valid ranges of the viewport width and height should be 0 to 1. The viewport left should be in between 0 and (1 - viewport width). The viewport top should be in between 0 and (1 - viewport height).

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