问题描述
我有一个透明的PNG文件，我使用如OpenGL纹理。我在位图与 BitmapFactory.de codeResource 加载它，然后把它上传到GPU。
I have a PNG file with transparency that I'm using as OpenGL texture. I load it in Bitmap with BitmapFactory.decodeResource, then upload it to GPU.
的PNG文件是相当大的，为了减少APK的大小，我试图用两个JPG文件，而不是 - 之一，RGB数据，和其他与alpha通道（灰度）
The PNG file is quite big and in order to cut down on APK size, I'm trying to use two JPGs instead--one with RGB data, and the other with alpha channel (grayscale).
如何将二者结合起来JPG文件放在一个位图的alpha通道对象？我尝试加载Alpha通道 Bitmap.Config.ALPHA_8 ，然后把他们拉对方使用画布，但至今没有运气。
How do I combine the two JPGs together in one Bitmap object with alpha channel? I tried loading alpha channel as Bitmap.Config.ALPHA_8, then drawing them on top of each other using Canvas but no luck so far.
推荐答案
看一看的以此相关的问题。他解释如何将4个独立的图像（R，G，B和A通道），但你应该能够适应它有两个图像的工作。
Have a look at Kevin Dion's answer to this related question. He explains how to combine 4 separate images (R, G, B and A channels) but you should be able to adapt it to work with two images.
这篇关于如何两个不透明的位图组合成一个alpha通道？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！