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/*
* 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 <ui/vec2.h>
#include <ui/vec3.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;
const vec3& operator [] (size_t i) const; // returns column i
float tx() const;
float 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;
vec2 transform(int x, int y) const;
Region transform(const Region& reg) const;
Rect transform(const Rect& bounds) const;
Transform operator * (const Transform& rhs) const;
Transform inverse() const;
// for debugging
void dump(const char* name) const;
private:
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;
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 */
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