Implementation method of cutting canvas for Android canvas drawing operation (cliprect)

This paper describes the implementation method of cutting canvas in Android canvas drawing operation. Share with you for your reference, as follows:

The process of Android cutting canvas is not very difficult, but it is also troublesome to understand. Here is my understanding, but it is not necessarily correct:

The last parameter has multiple choices, namely:

//Difference is the part that is different from the second time for the first time / / replace is the part that displays the second time / / reverse_ Difference is the second partial display different from the first / / intersect intersection display / / Union all display / / XOR complement is the display of the subtracted intersection part of the whole set

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I hope this article will help you in Android programming.