1 /* 2 * Copyright (C) 2010 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 ANDROID_HWUI_MATRIX_H 18 #define ANDROID_HWUI_MATRIX_H 19 20 #include <SkMatrix.h> 21 22 #include <cutils/compiler.h> 23 24 #include "Rect.h" 25 26 namespace android { 27 namespace uirenderer { 28 29 /////////////////////////////////////////////////////////////////////////////// 30 // Classes 31 /////////////////////////////////////////////////////////////////////////////// 32 33 class ANDROID_API Matrix4 { 34 public: 35 float data[16]; 36 37 enum Entry { 38 kScaleX = 0, 39 kSkewY = 1, 40 kPerspective0 = 3, 41 kSkewX = 4, 42 kScaleY = 5, 43 kPerspective1 = 7, 44 kScaleZ = 10, 45 kTranslateX = 12, 46 kTranslateY = 13, 47 kTranslateZ = 14, 48 kPerspective2 = 15 49 }; 50 51 // NOTE: The flags from kTypeIdentity to kTypePerspective 52 // must be kept in sync with the type flags found 53 // in SkMatrix 54 enum Type { 55 kTypeIdentity = 0, 56 kTypeTranslate = 0x1, 57 kTypeScale = 0x2, 58 kTypeAffine = 0x4, 59 kTypePerspective = 0x8, 60 kTypeRectToRect = 0x10, 61 kTypeUnknown = 0x20, 62 }; 63 64 static const int sGeometryMask = 0xf; 65 66 Matrix4() { 67 loadIdentity(); 68 } 69 70 Matrix4(const float* v) { 71 load(v); 72 } 73 74 Matrix4(const Matrix4& v) { 75 load(v); 76 } 77 78 Matrix4(const SkMatrix& v) { 79 load(v); 80 } 81 82 float operator[](int index) const { 83 return data[index]; 84 } 85 86 float& operator[](int index) { 87 mType = kTypeUnknown; 88 return data[index]; 89 } 90 91 Matrix4& operator=(const SkMatrix& v) { 92 load(v); 93 return *this; 94 } 95 96 friend bool operator==(const Matrix4& a, const Matrix4& b) { 97 return !memcmp(&a.data[0], &b.data[0], 16 * sizeof(float)); 98 } 99 100 friend bool operator!=(const Matrix4& a, const Matrix4& b) { 101 return !(a == b); 102 } 103 104 void loadIdentity(); 105 106 void load(const float* v); 107 void load(const Matrix4& v); 108 void load(const SkMatrix& v); 109 110 void loadInverse(const Matrix4& v); 111 112 void loadTranslate(float x, float y, float z); 113 void loadScale(float sx, float sy, float sz); 114 void loadSkew(float sx, float sy); 115 void loadRotate(float angle); 116 void loadRotate(float angle, float x, float y, float z); 117 void loadMultiply(const Matrix4& u, const Matrix4& v); 118 119 void loadOrtho(float left, float right, float bottom, float top, float near, float far); 120 121 uint32_t getType() const; 122 123 void multiply(const Matrix4& v) { 124 Matrix4 u; 125 u.loadMultiply(*this, v); 126 load(u); 127 } 128 129 void multiply(float v); 130 131 void translate(float x, float y, float z) { 132 Matrix4 u; 133 u.loadTranslate(x, y, z); 134 multiply(u); 135 } 136 137 void scale(float sx, float sy, float sz) { 138 Matrix4 u; 139 u.loadScale(sx, sy, sz); 140 multiply(u); 141 } 142 143 void skew(float sx, float sy) { 144 Matrix4 u; 145 u.loadSkew(sx, sy); 146 multiply(u); 147 } 148 149 void rotate(float angle, float x, float y, float z) { 150 Matrix4 u; 151 u.loadRotate(angle, x, y, z); 152 multiply(u); 153 } 154 155 /** 156 * If the matrix is identity or translate and/or scale. 157 */ 158 bool isSimple() const; 159 bool isPureTranslate() const; 160 bool isIdentity() const; 161 bool isPerspective() const; 162 bool rectToRect() const; 163 164 bool changesBounds() const; 165 166 void copyTo(float* v) const; 167 void copyTo(SkMatrix& v) const; 168 169 void mapRect(Rect& r) const; 170 void mapPoint(float& x, float& y) const; 171 172 float getTranslateX() const; 173 float getTranslateY() const; 174 175 void decomposeScale(float& sx, float& sy) const; 176 177 void dump() const; 178 179 static const Matrix4& identity(); 180 181 private: 182 mutable uint32_t mType; 183 184 inline float get(int i, int j) const { 185 return data[i * 4 + j]; 186 } 187 188 inline void set(int i, int j, float v) { 189 data[i * 4 + j] = v; 190 } 191 192 uint32_t getGeometryType() const; 193 194 }; // class Matrix4 195 196 /////////////////////////////////////////////////////////////////////////////// 197 // Types 198 /////////////////////////////////////////////////////////////////////////////// 199 200 typedef Matrix4 mat4; 201 202 }; // namespace uirenderer 203 }; // namespace android 204 205 #endif // ANDROID_HWUI_MATRIX_H 206
