Reduction kernel call from Single-Source in RenderScript

Question

I implemented an algorithm in Single-Source. Now, I want to decrease my algorithm's processing time with reduction.

Can reduction kernels be called from Single-Source in RenderScript?

Answer 1

In short, no. From the Renderscript documentation (bold is mine):

Android 7.0 (API level 24) introduces a new programming feature called Single-Source RenderScript, in which kernels are launched from the script where they are defined, rather than from Java. This approach is currently limited to mapping kernels , which are simply referred to as "kernels" in this section for conciseness.

However, I think you may also be confused about what a reduction kernel is. A reduction kernel is one which takes an input Allocation and outputs a single value (such as a minimum or maximum, the sum, etc.) It is not the same as optimizing your kernel, which is what it sounds like you are trying to do.

Answer 2

不，很遗憾，您不能，对不起。