/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef ANDROID_TRANSFORM_H #define ANDROID_TRANSFORM_H #include <stdint.h> #include <sys/types.h> #include <ui/Point.h> #include <ui/Rect.h> #include <hardware/hardware.h> namespace android { class Region; // --------------------------------------------------------------------------- class Transform { public: Transform(); Transform(const Transform& other); explicit Transform(uint32_t orientation); ~Transform(); enum orientation_flags { ROT_0 = 0x00000000, FLIP_H = HAL_TRANSFORM_FLIP_H, FLIP_V = HAL_TRANSFORM_FLIP_V, ROT_90 = HAL_TRANSFORM_ROT_90, ROT_180 = FLIP_H|FLIP_V, ROT_270 = ROT_180|ROT_90, ROT_INVALID = 0x80 }; enum type_mask { IDENTITY = 0, TRANSLATE = 0x1, ROTATE = 0x2, SCALE = 0x4, UNKNOWN = 0x8 }; // query the transform bool transformed() const; bool preserveRects() const; uint32_t getType() const; uint32_t getOrientation() const; float const* operator [] (int i) const; // returns column i int tx() const; int ty() const; // modify the transform void reset(); void set(float tx, float ty); void set(float a, float b, float c, float d); status_t set(uint32_t flags, float w, float h); // transform data Rect makeBounds(int w, int h) const; void transform(float* point, int x, int y) const; Region transform(const Region& reg) const; Transform operator * (const Transform& rhs) const; // for debugging void dump(const char* name) const; private: struct vec3 { float v[3]; inline vec3() { } inline vec3(float a, float b, float c) { v[0] = a; v[1] = b; v[2] = c; } inline float operator [] (int i) const { return v[i]; } inline float& operator [] (int i) { return v[i]; } }; struct vec2 { float v[2]; inline vec2() { } inline vec2(float a, float b) { v[0] = a; v[1] = b; } inline float operator [] (int i) const { return v[i]; } inline float& operator [] (int i) { return v[i]; } }; struct mat33 { vec3 v[3]; inline const vec3& operator [] (int i) const { return v[i]; } inline vec3& operator [] (int i) { return v[i]; } }; enum { UNKNOWN_TYPE = 0x80000000 }; // assumes the last row is < 0 , 0 , 1 > vec2 transform(const vec2& v) const; vec3 transform(const vec3& v) const; Rect transform(const Rect& bounds) const; uint32_t type() const; static bool absIsOne(float f); static bool isZero(float f); mat33 mMatrix; mutable uint32_t mType; }; // --------------------------------------------------------------------------- }; // namespace android #endif /* ANDROID_TRANSFORM_H */