Builder2

class Builder2

The builder class for creating script groups

A script group is created using closures (see class Closure). A closure is a function call to a kernel or invocable function. Each function argument or global variable accessed inside the function is bound to 1) a known value, 2) a script group input (see class Input), or 3) a future (see class Future). A future is the output of a closure, either the return value of the function or a global variable written by that function.

Closures are created using the addKernel or addInvoke methods. When a closure is created, futures from previously created closures can be used as its inputs. External script group inputs can be used as inputs to individual closures as well. An external script group input is created using the addInput method. A script group is created by a call to the create method, which accepts an array of futures as the outputs for the script group.

Closures in a script group can be evaluated in any order as long as the following conditions are met: 1) a closure must be evaluated before any other closures that take its futures as inputs; 2) all closures added before an invoke closure must be evaluated before it; and 3) all closures added after an invoke closure must be evaluated after it. As a special case, the order that the closures are added is a legal evaluation order. However, other evaluation orders are possible, including concurrently evaluating independent closures.

Summary

Public constructors

Builder2(rs: RenderScript!)

Public methods

fun addInput(): ScriptGroup.Input!

fun addInvoke(
    invoke: Script.InvokeID!, 
    vararg argsAndBindings: Any!
): ScriptGroup.Closure!

fun addKernel(
    k: Script.KernelID!, 
    returnType: Type!, 
    vararg argsAndBindings: Any!
): ScriptGroup.Closure!

fun create(
    name: String!, 
    vararg outputs: ScriptGroup.Future!
): ScriptGroup!