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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __FN_MULTI_FUNCTION_BUILDER_HH__
#define __FN_MULTI_FUNCTION_BUILDER_HH__
/** \file
* \ingroup fn
*
* This file contains several utilities to create multi-functions with less redundant code.
*/
#include <functional>
#include "FN_multi_function.hh"
namespace blender::fn {
/**
* Generates a multi-function with the following parameters:
* 1. single input (SI) of type In1
* 2. single output (SO) of type Out1
*
* This example creates a function that adds 10 to the incoming values:
* CustomMF_SI_SO<int, int> fn("add 10", [](int value) { return value + 10; });
*/
template<typename In1, typename Out1> class CustomMF_SI_SO : public MultiFunction {
private:
using FunctionT = std::function<void(IndexMask, VSpan<In1>, MutableSpan<Out1>)>;
FunctionT function_;
public:
CustomMF_SI_SO(StringRef name, FunctionT function) : function_(std::move(function))
{
MFSignatureBuilder signature = this->get_builder(name);
signature.single_input<In1>("In1");
signature.single_output<Out1>("Out1");
}
template<typename ElementFuncT>
CustomMF_SI_SO(StringRef name, ElementFuncT element_fn)
: CustomMF_SI_SO(name, CustomMF_SI_SO::create_function(element_fn))
{
}
template<typename ElementFuncT> static FunctionT create_function(ElementFuncT element_fn)
{
return [=](IndexMask mask, VSpan<In1> in1, MutableSpan<Out1> out1) {
mask.foreach_index([&](uint i) { new ((void *)&out1[i]) Out1(element_fn(in1[i])); });
};
}
void call(IndexMask mask, MFParams params, MFContext UNUSED(context)) const override
{
VSpan<In1> in1 = params.readonly_single_input<In1>(0);
MutableSpan<Out1> out1 = params.uninitialized_single_output<Out1>(1);
function_(mask, in1, out1);
}
};
/**
* Generates a multi-function with the following parameters:
* 1. single input (SI) of type In1
* 2. single input (SI) of type In2
* 3. single output (SO) of type Out1
*/
template<typename In1, typename In2, typename Out1>
class CustomMF_SI_SI_SO : public MultiFunction {
private:
using FunctionT = std::function<void(IndexMask, VSpan<In1>, VSpan<In2>, MutableSpan<Out1>)>;
FunctionT function_;
public:
CustomMF_SI_SI_SO(StringRef name, FunctionT function) : function_(std::move(function))
{
MFSignatureBuilder signature = this->get_builder(name);
signature.single_input<In1>("In1");
signature.single_input<In2>("In2");
signature.single_output<Out1>("Out1");
}
template<typename ElementFuncT>
CustomMF_SI_SI_SO(StringRef name, ElementFuncT element_fn)
: CustomMF_SI_SI_SO(name, CustomMF_SI_SI_SO::create_function(element_fn))
{
}
template<typename ElementFuncT> static FunctionT create_function(ElementFuncT element_fn)
{
return [=](IndexMask mask, VSpan<In1> in1, VSpan<In2> in2, MutableSpan<Out1> out1) {
mask.foreach_index([&](uint i) { new ((void *)&out1[i]) Out1(element_fn(in1[i], in2[i])); });
};
}
void call(IndexMask mask, MFParams params, MFContext UNUSED(context)) const override
{
VSpan<In1> in1 = params.readonly_single_input<In1>(0);
VSpan<In2> in2 = params.readonly_single_input<In2>(1);
MutableSpan<Out1> out1 = params.uninitialized_single_output<Out1>(2);
function_(mask, in1, in2, out1);
}
};
/**
* Generates a multi-function with the following parameters:
* 1. single input (SI) of type In1
* 2. single input (SI) of type In2
* 3. single input (SI) of type In3
* 4. single output (SO) of type Out1
*/
template<typename In1, typename In2, typename In3, typename Out1>
class CustomMF_SI_SI_SI_SO : public MultiFunction {
private:
using FunctionT =
std::function<void(IndexMask, VSpan<In1>, VSpan<In2>, VSpan<In3>, MutableSpan<Out1>)>;
FunctionT function_;
public:
CustomMF_SI_SI_SI_SO(StringRef name, FunctionT function) : function_(std::move(function))
{
MFSignatureBuilder signature = this->get_builder(name);
signature.single_input<In1>("In1");
signature.single_input<In2>("In2");
signature.single_input<In3>("In3");
signature.single_output<Out1>("Out1");
}
template<typename ElementFuncT>
CustomMF_SI_SI_SI_SO(StringRef name, ElementFuncT element_fn)
: CustomMF_SI_SI_SI_SO(name, CustomMF_SI_SI_SI_SO::create_function(element_fn))
{
}
template<typename ElementFuncT> static FunctionT create_function(ElementFuncT element_fn)
{
return [=](IndexMask mask,
VSpan<In1> in1,
VSpan<In2> in2,
VSpan<In3> in3,
MutableSpan<Out1> out1) {
mask.foreach_index(
[&](uint i) { new ((void *)&out1[i]) Out1(element_fn(in1[i], in2[i], in3[i])); });
};
}
void call(IndexMask mask, MFParams params, MFContext UNUSED(context)) const override
{
VSpan<In1> in1 = params.readonly_single_input<In1>(0);
VSpan<In2> in2 = params.readonly_single_input<In2>(1);
VSpan<In3> in3 = params.readonly_single_input<In3>(2);
MutableSpan<Out1> out1 = params.uninitialized_single_output<Out1>(3);
function_(mask, in1, in2, in3, out1);
}
};
/**
* Generates a multi-function with the following parameters:
* 1. single mutable (SM) of type Mut1
*/
template<typename Mut1> class CustomMF_SM : public MultiFunction {
private:
using FunctionT = std::function<void(IndexMask, MutableSpan<Mut1>)>;
FunctionT function_;
public:
CustomMF_SM(StringRef name, FunctionT function) : function_(std::move(function))
{
MFSignatureBuilder signature = this->get_builder(name);
signature.single_mutable<Mut1>("Mut1");
}
template<typename ElementFuncT>
CustomMF_SM(StringRef name, ElementFuncT element_fn)
: CustomMF_SM(name, CustomMF_SM::create_function(element_fn))
{
}
template<typename ElementFuncT> static FunctionT create_function(ElementFuncT element_fn)
{
return [=](IndexMask mask, MutableSpan<Mut1> mut1) {
mask.foreach_index([&](uint i) { element_fn(mut1[i]); });
};
}
void call(IndexMask mask, MFParams params, MFContext UNUSED(context)) const override
{
MutableSpan<Mut1> mut1 = params.single_mutable<Mut1>(0);
function_(mask, mut1);
}
};
/**
* Generates a multi-function that outputs a constant value.
*/
template<typename T> class CustomMF_Constant : public MultiFunction {
private:
T value_;
public:
template<typename U> CustomMF_Constant(U &&value) : value_(std::forward<U>(value))
{
MFSignatureBuilder signature = this->get_builder("Constant");
std::stringstream ss;
ss << value_;
signature.single_output<T>(ss.str());
}
void call(IndexMask mask, MFParams params, MFContext UNUSED(context)) const override
{
MutableSpan<T> output = params.uninitialized_single_output<T>(0);
mask.foreach_index([&](uint i) { new (&output[i]) T(value_); });
}
};
} // namespace blender::fn
#endif /* __FN_MULTI_FUNCTION_BUILDER_HH__ */
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