指南用刷子和笔 [英] Guidelines for Using Brushes and Pens

问题描述

如何昂贵是它创建GDI刷子和笔吗？我应该在一个需要添加基础创建它们，然后将它们包装一个使用，使他们迅速布置，或者我应该创建一个静态类类似System.Drawing.Brushes类？

How expensive is it to create gdi brushes and pens? Should I create them on an add needed basis and wrap them in a using so they are disposed quickly, or should I create a static class similar to System.Drawing.Brushes class?

推荐答案

IMO，他们有足够的效率，你通常应该不会创建用于在多个方法调用长寿命的情况下，但足够低效率的，你应该创建的每个人们只要一旦特定方法中，而不是创建一个新的每次你需要画一些时间。

IMO, they're efficient enough that you should usually not create long-lived instances that are used over several method calls, but inefficient enough that you should create each one only once within a particular method, instead of creating a new one each time you need to draw something.

在换句话说，不存储自定义画笔在你的类，你用它来绘制的每个的OnPaint 打电话给你的文字，也没有创建新的刷的每一行文字的你，OnPaint中调用内画，无论是。

In other words, don't store a custom brush in your class that you use to paint your text on every OnPaint call, but also don't create a new brush for every line of text you draw within that OnPaint call, either.

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