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 #define MATRIX_STRING "[%.2f %.2f %.2f] [%.2f %.2f %.2f] [%.2f %.2f %.2f]" 30 #define MATRIX_ARGS(m) \ 31 (m)->get(0), (m)->get(1), (m)->get(2), \ 32 (m)->get(3), (m)->get(4), (m)->get(5), \ 33 (m)->get(6), (m)->get(7), (m)->get(8) 34 35 /////////////////////////////////////////////////////////////////////////////// 36 // Classes 37 /////////////////////////////////////////////////////////////////////////////// 38 39 class ANDROID_API Matrix4 { 40 public: 41 float data[16]; 42 43 enum Entry { 44 kScaleX = 0, 45 kSkewY = 1, 46 kPerspective0 = 3, 47 kSkewX = 4, 48 kScaleY = 5, 49 kPerspective1 = 7, 50 kScaleZ = 10, 51 kTranslateX = 12, 52 kTranslateY = 13, 53 kTranslateZ = 14, 54 kPerspective2 = 15 55 }; 56 57 // NOTE: The flags from kTypeIdentity to kTypePerspective 58 // must be kept in sync with the type flags found 59 // in SkMatrix 60 enum Type { 61 kTypeIdentity = 0, 62 kTypeTranslate = 0x1, 63 kTypeScale = 0x2, 64 kTypeAffine = 0x4, 65 kTypePerspective = 0x8, 66 kTypeRectToRect = 0x10, 67 kTypeUnknown = 0x20, 68 }; 69 70 static const int sGeometryMask = 0xf; 71 72 Matrix4() { 73 loadIdentity(); 74 } 75 76 Matrix4(const float* v) { 77 load(v); 78 } 79 80 Matrix4(const Matrix4& v) { 81 load(v); 82 } 83 84 Matrix4(const SkMatrix& v) { 85 load(v); 86 } 87 88 float operator[](int index) const { 89 return data[index]; 90 } 91 92 float& operator[](int index) { 93 mType = kTypeUnknown; 94 return data[index]; 95 } 96 97 Matrix4& operator=(const SkMatrix& v) { 98 load(v); 99 return *this; 100 } 101 102 friend bool operator==(const Matrix4& a, const Matrix4& b) { 103 return !memcmp(&a.data[0], &b.data[0], 16 * sizeof(float)); 104 } 105 106 friend bool operator!=(const Matrix4& a, const Matrix4& b) { 107 return !(a == b); 108 } 109 110 void loadIdentity(); 111 112 void load(const float* v); 113 void load(const Matrix4& v); 114 void load(const SkMatrix& v); 115 116 void loadInverse(const Matrix4& v); 117 118 void loadTranslate(float x, float y, float z); 119 void loadScale(float sx, float sy, float sz); 120 void loadSkew(float sx, float sy); 121 void loadRotate(float angle); 122 void loadRotate(float angle, float x, float y, float z); 123 void loadMultiply(const Matrix4& u, const Matrix4& v); 124 125 void loadOrtho(float left, float right, float bottom, float top, float near, float far); 126 127 uint8_t getType() const; 128 129 void multiply(const Matrix4& v) { 130 Matrix4 u; 131 u.loadMultiply(*this, v); 132 load(u); 133 } 134 135 void multiply(float v); 136 137 void translate(float x, float y) { 138 if ((getType() & sGeometryMask) <= kTypeTranslate) { 139 data[kTranslateX] += x; 140 data[kTranslateY] += y; 141 } else { 142 // Doing a translation will only affect the translate bit of the type 143 // Save the type 144 uint8_t type = mType; 145 146 Matrix4 u; 147 u.loadTranslate(x, y, 0.0f); 148 multiply(u); 149 150 // Restore the type and fix the translate bit 151 mType = type; 152 if (data[kTranslateX] != 0.0f || data[kTranslateY] != 0.0f) { 153 mType |= kTypeTranslate; 154 } else { 155 mType &= ~kTypeTranslate; 156 } 157 } 158 } 159 160 void scale(float sx, float sy, float sz) { 161 Matrix4 u; 162 u.loadScale(sx, sy, sz); 163 multiply(u); 164 } 165 166 void skew(float sx, float sy) { 167 Matrix4 u; 168 u.loadSkew(sx, sy); 169 multiply(u); 170 } 171 172 void rotate(float angle, float x, float y, float z) { 173 Matrix4 u; 174 u.loadRotate(angle, x, y, z); 175 multiply(u); 176 } 177 178 /** 179 * If the matrix is identity or translate and/or scale. 180 */ 181 bool isSimple() const; 182 bool isPureTranslate() const; 183 bool isIdentity() const; 184 bool isPerspective() const; 185 bool rectToRect() const; 186 bool positiveScale() const; 187 188 bool changesBounds() const; 189 190 void copyTo(float* v) const; 191 void copyTo(SkMatrix& v) const; 192 193 void mapRect(Rect& r) const; 194 void mapPoint(float& x, float& y) const; 195 196 float getTranslateX() const; 197 float getTranslateY() const; 198 199 void decomposeScale(float& sx, float& sy) const; 200 201 void dump() const; 202 203 static const Matrix4& identity(); 204 205 private: 206 mutable uint8_t mType; 207 208 inline float get(int i, int j) const { 209 return data[i * 4 + j]; 210 } 211 212 inline void set(int i, int j, float v) { 213 data[i * 4 + j] = v; 214 } 215 216 uint8_t getGeometryType() const; 217 218 }; // class Matrix4 219 220 /////////////////////////////////////////////////////////////////////////////// 221 // Types 222 /////////////////////////////////////////////////////////////////////////////// 223 224 typedef Matrix4 mat4; 225 226 }; // namespace uirenderer 227 }; // namespace android 228 229 #endif // ANDROID_HWUI_MATRIX_H 230
