| /* |
| * 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 <string> |
| |
| #include <hardware/hardware.h> |
| #include <math/mat4.h> |
| #include <math/vec2.h> |
| #include <math/vec3.h> |
| #include <ui/Point.h> |
| #include <ui/Rect.h> |
| |
| namespace android { |
| |
| class Region; |
| |
| namespace ui { |
| |
| 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 : uint32_t { |
| IDENTITY = 0, |
| TRANSLATE = 0x1, |
| ROTATE = 0x2, |
| SCALE = 0x4, |
| UNKNOWN = 0x8 |
| }; |
| |
| // query the transform |
| bool preserveRects() const; |
| uint32_t getType() const; |
| uint32_t getOrientation() const; |
| |
| const vec3& operator [] (size_t i) const; // returns column i |
| float tx() const; |
| float ty() const; |
| float sx() const; |
| float sy() 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; |
| vec2 transform(int x, int y) const; |
| Region transform(const Region& reg) const; |
| Rect transform(const Rect& bounds, |
| bool roundOutwards = false) const; |
| FloatRect transform(const FloatRect& bounds) const; |
| Transform& operator = (const Transform& other); |
| Transform operator * (const Transform& rhs) const; |
| // assumes the last row is < 0 , 0 , 1 > |
| vec2 transform(const vec2& v) const; |
| vec3 transform(const vec3& v) const; |
| |
| // Expands from the internal 3x3 matrix to an equivalent 4x4 matrix |
| mat4 asMatrix4() const; |
| |
| Transform inverse() const; |
| |
| // for debugging |
| void dump(std::string& result, const char* name) const; |
| void dump(const char* name) const; |
| |
| private: |
| struct mat33 { |
| vec3 v[3]; |
| inline const vec3& operator [] (size_t i) const { return v[i]; } |
| inline vec3& operator [] (size_t i) { return v[i]; } |
| }; |
| |
| enum { UNKNOWN_TYPE = 0x80000000 }; |
| |
| uint32_t type() const; |
| static bool absIsOne(float f); |
| static bool isZero(float f); |
| |
| mat33 mMatrix; |
| mutable uint32_t mType; |
| }; |
| |
| } // namespace ui |
| } // namespace android |
| |
| #endif /* ANDROID_TRANSFORM_H */ |