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 23 #include <ui/Point.h> 24 #include <ui/Rect.h> 25 26 #include <hardware/hardware.h> 27 28 namespace android { 29 30 class Region; 31 32 // --------------------------------------------------------------------------- 33 34 class Transform 35 { 36 public: 37 Transform(); 38 Transform(const Transform& other); 39 explicit Transform(uint32_t orientation); 40 ~Transform(); 41 42 enum orientation_flags { 43 ROT_0 = 0x00000000, 44 FLIP_H = HAL_TRANSFORM_FLIP_H, 45 FLIP_V = HAL_TRANSFORM_FLIP_V, 46 ROT_90 = HAL_TRANSFORM_ROT_90, 47 ROT_180 = FLIP_H|FLIP_V, 48 ROT_270 = ROT_180|ROT_90, 49 ROT_INVALID = 0x80 50 }; 51 52 enum type_mask { 53 IDENTITY = 0, 54 TRANSLATE = 0x1, 55 ROTATE = 0x2, 56 SCALE = 0x4, 57 UNKNOWN = 0x8 58 }; 59 60 // query the transform 61 bool transformed() const; 62 bool preserveRects() const; 63 uint32_t getType() const; 64 uint32_t getOrientation() const; 65 66 float const* operator [] (int i) const; // returns column i 67 float tx() const; 68 float ty() const; 69 70 // modify the transform 71 void reset(); 72 void set(float tx, float ty); 73 void set(float a, float b, float c, float d); 74 status_t set(uint32_t flags, float w, float h); 75 76 // transform data 77 Rect makeBounds(int w, int h) const; 78 void transform(float* point, int x, int y) const; 79 Region transform(const Region& reg) const; 80 Rect transform(const Rect& bounds) const; 81 Transform operator * (const Transform& rhs) const; 82 83 Transform inverse() const; 84 85 // for debugging 86 void dump(const char* name) const; 87 88 private: 89 struct vec3 { 90 float v[3]; vec3vec391 inline vec3() { } vec3vec392 inline vec3(float a, float b, float c) { 93 v[0] = a; v[1] = b; v[2] = c; 94 } 95 inline float operator [] (int i) const { return v[i]; } 96 inline float& operator [] (int i) { return v[i]; } 97 }; 98 struct vec2 { 99 float v[2]; vec2vec2100 inline vec2() { } vec2vec2101 inline vec2(float a, float b) { 102 v[0] = a; v[1] = b; 103 } 104 inline float operator [] (int i) const { return v[i]; } 105 inline float& operator [] (int i) { return v[i]; } 106 }; 107 struct mat33 { 108 vec3 v[3]; 109 inline const vec3& operator [] (int i) const { return v[i]; } 110 inline vec3& operator [] (int i) { return v[i]; } 111 }; 112 113 enum { UNKNOWN_TYPE = 0x80000000 }; 114 115 // assumes the last row is < 0 , 0 , 1 > 116 vec2 transform(const vec2& v) const; 117 vec3 transform(const vec3& v) const; 118 uint32_t type() const; 119 static bool absIsOne(float f); 120 static bool isZero(float f); 121 122 mat33 mMatrix; 123 mutable uint32_t mType; 124 }; 125 126 // --------------------------------------------------------------------------- 127 }; // namespace android 128 129 #endif /* ANDROID_TRANSFORM_H */ 130