2 * Copyright (C) 2007 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef ANDROID_TRANSFORM_H
18 #define ANDROID_TRANSFORM_H
21 #include <sys/types.h>
26 #include <hardware/hardware.h>
32 // ---------------------------------------------------------------------------
38 Transform(const Transform& other);
39 explicit Transform(uint32_t orientation);
42 enum orientation_flags {
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,
60 // query the transform
61 bool transformed() const;
62 bool preserveRects() const;
63 uint32_t getType() const;
64 uint32_t getOrientation() const;
66 float const* operator [] (int i) const; // returns column i
70 // modify the transform
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);
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 Transform operator * (const Transform& rhs) const;
83 void dump(const char* name) const;
89 inline vec3(float a, float b, float c) {
90 v[0] = a; v[1] = b; v[2] = c;
92 inline float operator [] (int i) const { return v[i]; }
93 inline float& operator [] (int i) { return v[i]; }
98 inline vec2(float a, float b) {
101 inline float operator [] (int i) const { return v[i]; }
102 inline float& operator [] (int i) { return v[i]; }
106 inline const vec3& operator [] (int i) const { return v[i]; }
107 inline vec3& operator [] (int i) { return v[i]; }
110 enum { UNKNOWN_TYPE = 0x80000000 };
112 // assumes the last row is < 0 , 0 , 1 >
113 vec2 transform(const vec2& v) const;
114 vec3 transform(const vec3& v) const;
115 Rect transform(const Rect& bounds) const;
116 uint32_t type() const;
117 static bool absIsOne(float f);
118 static bool isZero(float f);
121 mutable uint32_t mType;
124 // ---------------------------------------------------------------------------
125 }; // namespace android
127 #endif /* ANDROID_TRANSFORM_H */