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