1 /* 2 * Copyright 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef UI_VEC4_H 18 #define UI_VEC4_H 19 20 #include <stdint.h> 21 #include <sys/types.h> 22 23 #include <ui/vec3.h> 24 25 namespace android { 26 // ------------------------------------------------------------------------------------- 27 28 template <typename T> 29 class tvec4 : public TVecProductOperators<tvec4, T>, 30 public TVecAddOperators<tvec4, T>, 31 public TVecUnaryOperators<tvec4, T>, 32 public TVecComparisonOperators<tvec4, T>, 33 public TVecFunctions<tvec4, T> 34 { 35 public: 36 enum no_init { NO_INIT }; 37 typedef T value_type; 38 typedef T& reference; 39 typedef T const& const_reference; 40 typedef size_t size_type; 41 42 union { 43 struct { T x, y, z, w; }; 44 struct { T s, t, p, q; }; 45 struct { T r, g, b, a; }; 46 Impersonator< tvec2<T> > xy; 47 Impersonator< tvec2<T> > st; 48 Impersonator< tvec2<T> > rg; 49 Impersonator< tvec3<T> > xyz; 50 Impersonator< tvec3<T> > stp; 51 Impersonator< tvec3<T> > rgb; 52 }; 53 54 enum { SIZE = 4 }; 55 inline static size_type size() { return SIZE; } 56 57 // array access 58 inline T const& operator [] (size_t i) const { return (&x)[i]; } 59 inline T& operator [] (size_t i) { return (&x)[i]; } 60 61 // ----------------------------------------------------------------------- 62 // we don't provide copy-ctor and operator= on purpose 63 // because we want the compiler generated versions 64 65 // constructors 66 67 // leaves object uninitialized. use with caution. 68 explicit tvec4(no_init) { } 69 70 // default constructor 71 tvec4() : x(0), y(0), z(0), w(0) { } 72 73 // handles implicit conversion to a tvec4. must not be explicit. 74 template<typename A> 75 tvec4(A v) : x(v), y(v), z(v), w(v) { } 76 77 template<typename A, typename B, typename C, typename D> 78 tvec4(A x, B y, C z, D w) : x(x), y(y), z(z), w(w) { } 79 80 template<typename A, typename B, typename C> 81 tvec4(const tvec2<A>& v, B z, C w) : x(v.x), y(v.y), z(z), w(w) { } 82 83 template<typename A, typename B> 84 tvec4(const tvec3<A>& v, B w) : x(v.x), y(v.y), z(v.z), w(w) { } 85 86 template<typename A> 87 explicit tvec4(const tvec4<A>& v) : x(v.x), y(v.y), z(v.z), w(v.w) { } 88 89 template<typename A> 90 tvec4(const Impersonator< tvec4<A> >& v) 91 : x(((const tvec4<A>&)v).x), 92 y(((const tvec4<A>&)v).y), 93 z(((const tvec4<A>&)v).z), 94 w(((const tvec4<A>&)v).w) { } 95 96 template<typename A, typename B> 97 tvec4(const Impersonator< tvec3<A> >& v, B w) 98 : x(((const tvec3<A>&)v).x), 99 y(((const tvec3<A>&)v).y), 100 z(((const tvec3<A>&)v).z), 101 w(w) { } 102 103 template<typename A, typename B, typename C> 104 tvec4(const Impersonator< tvec2<A> >& v, B z, C w) 105 : x(((const tvec2<A>&)v).x), 106 y(((const tvec2<A>&)v).y), 107 z(z), 108 w(w) { } 109 }; 110 111 // ---------------------------------------------------------------------------------------- 112 113 typedef tvec4<float> vec4; 114 115 // ---------------------------------------------------------------------------------------- 116 }; // namespace android 117 118 #endif /* UI_VEC4_H */ 119
