1 /* 2 * Copyright (C) 2007 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_TRANSFORM_H 18 #define ANDROID_TRANSFORM_H 19 20 #include <stdint.h> 21 #include <sys/types.h> 22 #include <string> 23 24 #include <hardware/hardware.h> 25 #include <math/mat4.h> 26 #include <math/vec2.h> 27 #include <math/vec3.h> 28 #include <ui/Point.h> 29 #include <ui/Rect.h> 30 31 namespace android { 32 33 class Region; 34 35 namespace ui { 36 37 class Transform { 38 public: 39 Transform(); 40 Transform(const Transform& other); 41 explicit Transform(uint32_t orientation); 42 ~Transform(); 43 44 enum orientation_flags { 45 ROT_0 = 0x00000000, 46 FLIP_H = HAL_TRANSFORM_FLIP_H, 47 FLIP_V = HAL_TRANSFORM_FLIP_V, 48 ROT_90 = HAL_TRANSFORM_ROT_90, 49 ROT_180 = FLIP_H|FLIP_V, 50 ROT_270 = ROT_180|ROT_90, 51 ROT_INVALID = 0x80 52 }; 53 54 enum type_mask : uint32_t { 55 IDENTITY = 0, 56 TRANSLATE = 0x1, 57 ROTATE = 0x2, 58 SCALE = 0x4, 59 UNKNOWN = 0x8 60 }; 61 62 // query the transform 63 bool preserveRects() const; 64 uint32_t getType() const; 65 uint32_t getOrientation() const; 66 67 const vec3& operator [] (size_t i) const; // returns column i 68 float tx() const; 69 float ty() const; 70 float sx() const; 71 float sy() const; 72 73 // modify the transform 74 void reset(); 75 void set(float tx, float ty); 76 void set(float a, float b, float c, float d); 77 status_t set(uint32_t flags, float w, float h); 78 79 // transform data 80 Rect makeBounds(int w, int h) const; 81 vec2 transform(int x, int y) const; 82 Region transform(const Region& reg) const; 83 Rect transform(const Rect& bounds, 84 bool roundOutwards = false) const; 85 FloatRect transform(const FloatRect& bounds) const; 86 Transform& operator = (const Transform& other); 87 Transform operator * (const Transform& rhs) const; 88 // assumes the last row is < 0 , 0 , 1 > 89 vec2 transform(const vec2& v) const; 90 vec3 transform(const vec3& v) const; 91 92 // Expands from the internal 3x3 matrix to an equivalent 4x4 matrix 93 mat4 asMatrix4() const; 94 95 Transform inverse() const; 96 97 // for debugging 98 void dump(std::string& result, const char* name) const; 99 void dump(const char* name) const; 100 101 private: 102 struct mat33 { 103 vec3 v[3]; 104 inline const vec3& operator [] (size_t i) const { return v[i]; } 105 inline vec3& operator [] (size_t i) { return v[i]; } 106 }; 107 108 enum { UNKNOWN_TYPE = 0x80000000 }; 109 110 uint32_t type() const; 111 static bool absIsOne(float f); 112 static bool isZero(float f); 113 114 mat33 mMatrix; 115 mutable uint32_t mType; 116 }; 117 118 } // namespace ui 119 } // namespace android 120 121 #endif /* ANDROID_TRANSFORM_H */ 122
