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 #include <ui/vec2.h> 26 #include <ui/vec3.h> 27 28 #include <hardware/hardware.h> 29 30 namespace android { 31 32 class Region; 33 34 // --------------------------------------------------------------------------- 35 36 class Transform 37 { 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 { 55 IDENTITY = 0, 56 TRANSLATE = 0x1, 57 ROTATE = 0x2, 58 SCALE = 0x4, 59 UNKNOWN = 0x8 60 }; 61 62 // query the transform 63 bool transformed() const; 64 bool preserveRects() const; 65 uint32_t getType() const; 66 uint32_t getOrientation() const; 67 68 const vec3& operator [] (size_t i) const; // returns column i 69 float tx() const; 70 float ty() const; 71 72 // modify the transform 73 void reset(); 74 void set(float tx, float ty); 75 void set(float a, float b, float c, float d); 76 status_t set(uint32_t flags, float w, float h); 77 78 // transform data 79 Rect makeBounds(int w, int h) const; 80 vec2 transform(int x, int y) const; 81 Region transform(const Region& reg) const; 82 Rect transform(const Rect& bounds) const; 83 Transform operator * (const Transform& rhs) const; 84 85 Transform inverse() const; 86 87 // for debugging 88 void dump(const char* name) const; 89 90 private: 91 struct mat33 { 92 vec3 v[3]; 93 inline const vec3& operator [] (int i) const { return v[i]; } 94 inline vec3& operator [] (int i) { return v[i]; } 95 }; 96 97 enum { UNKNOWN_TYPE = 0x80000000 }; 98 99 // assumes the last row is < 0 , 0 , 1 > 100 vec2 transform(const vec2& v) const; 101 vec3 transform(const vec3& v) const; 102 uint32_t type() const; 103 static bool absIsOne(float f); 104 static bool isZero(float f); 105 106 mat33 mMatrix; 107 mutable uint32_t mType; 108 }; 109 110 // --------------------------------------------------------------------------- 111 }; // namespace android 112 113 #endif /* ANDROID_TRANSFORM_H */ 114