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