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#pragma once
#include "drape/glsl_types.hpp"
#include "base/assert.hpp"
#include <type_traits>
#include <utility>
namespace df
{
#define DECLARE_SETTER(name, field) \
template<typename T> struct Check##name \
{ \
private: \
static void Detect(...); \
template<typename U> static decltype(std::declval<U>().field) Detect(U const &); \
public: \
static constexpr bool Value = !std::is_same<void, decltype(Detect(std::declval<T>()))>::value; \
}; \
template <typename ParamsType> \
std::enable_if_t<Check##name<ParamsType>::Value> \
name(ParamsType & params) const \
{ \
params.field = field; \
} \
template <typename ParamsType> \
std::enable_if_t<!Check##name<ParamsType>::Value> \
name(ParamsType & params) const {}
struct FrameValues
{
glsl::mat4 m_projection;
glsl::mat4 m_pivotTransform;
float m_zScale = 1.0f;
template <typename ParamsType>
void SetTo(ParamsType & params) const
{
SetProjection(params);
SetPivotTransform(params);
SetZScale(params);
}
private:
DECLARE_SETTER(SetProjection, m_projection)
DECLARE_SETTER(SetPivotTransform, m_pivotTransform)
DECLARE_SETTER(SetZScale, m_zScale)
};
} // namespace df
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