如何着色位图以纯色 [英] How to tint a Bitmap to a solid color

问题描述

一个人怎么会去着色位图以纯色，有效地取代有alpha> 0到给定RGB值的所有像素？除了如何做同样的事情，但保持阿尔法每个像素？我不是在寻找的每个像素的操作，因为他们往往​​是缓慢的。

How would one go about tinting a Bitmap to a solid color, effectively replacing all pixels that have an alpha > 0 to a given RGB value? In addition how to do the same thing, but keeping the alpha for every pixel? I'm not looking for per-pixel operations as they tend to be slow.

我试图用一个ColorMatrixColorFilter和ColorFilter，该做的着色位图，但它们上色执行100％的色彩代替。

I tried using a ColorMatrixColorFilter and a ColorFilter, which do tint the Bitmap, but they colorize instead of performing a 100% tint.

推荐答案

我解决了这个用PorterDuffColorFilter

I solved this by using a PorterDuffColorFilter

Paint paint = new Paint();
paint.setColorFilter(new PorterDuffColorFilter(targetColor, PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(resource, matrix, paint);

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