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/*
* Copyright © 2012-2021 VMware, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#pragma once
#include "operator.h"
#include "selector.h"
#include "variable.h"
#include "immediate.h"
namespace glsl
{
class Constant : public Operator
{
friend class Shader;
friend class ShaderConstant;
public:
Constant(const Variable& variable)
: Operator(Operator::CONSTANT), mVariable(variable.name()), mSelector(variable.value())
{
}
Constant(const std::string& variable, Selector selector)
: Operator(Operator::CONSTANT), mVariable(variable), mSelector(selector)
{
}
Constant(const Constant& src, const Selector& selector)
: Operator(Operator::CONSTANT), mVariable(src.mVariable), mSelector(selector)
{
}
~Constant()
{
}
virtual Value execute(ShaderState& state) const
{
return mSelector.select(state[mVariable].value());
}
virtual std::string toGLSL() const
{
std::string selector = mSelector.toString();
if (selector.length())
return mVariable + "." + selector;
else
return mVariable;
}
void setValue(ShaderState& result, const Value& value) const
{
result[mVariable] = mSelector.select(result[mVariable].value(), value);
}
protected:
std::string mVariable;
Selector mSelector;
};
}
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