问题描述
我使用pictureBox和Bitmap，放在表格上.
首先，我在位图上绘画，并使用图片的属性:image，直接渲染我绘制的内容.因为我的笔需要Alpha值，所以我使用GDI +来解决它.随着使用GDI +的出现，我发现笔刷的速度非常缓慢.在测试过程中，我知道需要计算每个用alpha绘制的内容的原因，并且我还发现我失去了参加mousemove事件的机会，这可能会导致我丢失点.我不知道如何改进它，如果您有什么想法，请尽快告诉我.
I use a pictureBox and Bitmap,drop on form.
First I paint on my bitmap,and using picture''s attribute :image, direct render what I have painted. Because my pen need Alpha value,so I use GDI+ to solve it. As the occurrence of using GDI+ ,I found the speed of my brush so slowly. During test ,I know the reason that each what I have painted with alpha needs to calculate,and I alse found I lost the chance to enter into mousemove event which may leads I lost dot. I don''t know how to improve it,if you have some idea,please let me know soon.
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