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* Copyright 2013 The Android Open Source Project
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#pragma once
#include <math/vec3.h>
#include <math/half.h>
#include <stdint.h>
#include <sys/types.h>
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wgnu-anonymous-struct"
#pragma clang diagnostic ignored "-Wnested-anon-types"
namespace android {
// -------------------------------------------------------------------------------------
namespace details {
template <typename T>
class TVec4 : public TVecProductOperators<TVec4, T>,
public TVecAddOperators<TVec4, T>,
public TVecUnaryOperators<TVec4, T>,
public TVecComparisonOperators<TVec4, T>,
public TVecFunctions<TVec4, T>,
public TVecDebug<TVec4, T> {
enum no_init { NO_INIT };
typedef T value_type;
typedef T& reference;
typedef T const& const_reference;
typedef size_t size_type;
union {
struct { T x, y, z, w; };
struct { T s, t, p, q; };
struct { T r, g, b, a; };
TVec2<T> xy;
TVec2<T> st;
TVec2<T> rg;
TVec3<T> xyz;
TVec3<T> stp;
TVec3<T> rgb;
static constexpr size_t SIZE = 4;
inline constexpr size_type size() const { return SIZE; }
// array access
inline constexpr T const& operator[](size_t i) const {
#if __cplusplus >= 201402L
// only possible in C++0x14 with constexpr
assert(i < SIZE);
return (&x)[i];
inline T& operator[](size_t i) {
assert(i < SIZE);
return (&x)[i];
// -----------------------------------------------------------------------
// we want the compiler generated versions for these...
TVec4(const TVec4&) = default;
~TVec4() = default;
TVec4& operator = (const TVec4&) = default;
// constructors
// leaves object uninitialized. use with caution.
constexpr TVec4(no_init) { }
// default constructor
constexpr TVec4() : x(0), y(0), z(0), w(0) { }
// handles implicit conversion to a tvec4. must not be explicit.
template<typename A, typename = typename std::enable_if<std::is_arithmetic<A>::value >::type>
constexpr TVec4(A v) : x(v), y(v), z(v), w(v) { }
template<typename A, typename B, typename C, typename D>
constexpr TVec4(A x, B y, C z, D w) : x(x), y(y), z(z), w(w) { }
template<typename A, typename B, typename C>
constexpr TVec4(const TVec2<A>& v, B z, C w) : x(v.x), y(v.y), z(z), w(w) { }
template<typename A, typename B>
constexpr TVec4(const TVec3<A>& v, B w) : x(v.x), y(v.y), z(v.z), w(w) { }
template<typename A>
constexpr TVec4(const TVec4<A>& v) : x(v.x), y(v.y), z(v.z), w(v.w) { }
} // namespace details
// ----------------------------------------------------------------------------------------
typedef details::TVec4<double> double4;
typedef details::TVec4<float> float4;
typedef details::TVec4<float> vec4;
typedef details::TVec4<half> half4;
typedef details::TVec4<int32_t> int4;
typedef details::TVec4<uint32_t> uint4;
typedef details::TVec4<int16_t> short4;
typedef details::TVec4<uint16_t> ushort4;
typedef details::TVec4<int8_t> byte4;
typedef details::TVec4<uint8_t> ubyte4;
typedef details::TVec4<bool> bool4;
// ----------------------------------------------------------------------------------------
} // namespace android
#pragma clang diagnostic pop