这个程序是讲述如何进行一键多功能的处理函数的,想要做按键程序的朋友们有福了-This program is about how to deal with a multi-purpose function keys, key programs want to do themselves lucky!!!

Lucky for us, in both RGBA and BGRA, the alpha component is always in the same place, so we can perform premul or unpremul the same way without knowing the swizzles for RGB. -Lucky for us, in both RGBA and BGRA, the alpha component is always in the