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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_UI_REGION_H
#define ANDROID_UI_REGION_H
#include <stdint.h>
#include <sys/types.h>
#include <utils/Vector.h>
#include <utils/Parcel.h>
#include <ui/Rect.h>
#include <hardware/copybit.h>
#include <core/SkRegion.h>
namespace android {
// ---------------------------------------------------------------------------
class String8;
// ---------------------------------------------------------------------------
class Region
{
public:
Region();
Region(const Region& rhs);
explicit Region(const SkRegion& rhs);
explicit Region(const Rect& rhs);
explicit Region(const Parcel& parcel);
explicit Region(const void* buffer);
~Region();
Region& operator = (const Region& rhs);
inline bool isEmpty() const { return mRegion.isEmpty(); }
inline bool isRect() const { return mRegion.isRect(); }
Rect bounds() const;
const SkRegion& toSkRegion() const;
void clear();
void set(const Rect& r);
Region& orSelf(const Rect& rhs);
Region& andSelf(const Rect& rhs);
// boolean operators, applied on this
Region& orSelf(const Region& rhs);
Region& andSelf(const Region& rhs);
Region& subtractSelf(const Region& rhs);
// these translate rhs first
Region& translateSelf(int dx, int dy);
Region& orSelf(const Region& rhs, int dx, int dy);
Region& andSelf(const Region& rhs, int dx, int dy);
Region& subtractSelf(const Region& rhs, int dx, int dy);
// boolean operators
Region merge(const Region& rhs) const;
Region intersect(const Region& rhs) const;
Region subtract(const Region& rhs) const;
// these translate rhs first
Region translate(int dx, int dy) const;
Region merge(const Region& rhs, int dx, int dy) const;
Region intersect(const Region& rhs, int dx, int dy) const;
Region subtract(const Region& rhs, int dx, int dy) const;
// convenience operators overloads
inline Region operator | (const Region& rhs) const;
inline Region operator & (const Region& rhs) const;
inline Region operator - (const Region& rhs) const;
inline Region operator + (const Point& pt) const;
inline Region& operator |= (const Region& rhs);
inline Region& operator &= (const Region& rhs);
inline Region& operator -= (const Region& rhs);
inline Region& operator += (const Point& pt);
class iterator {
SkRegion::Iterator mIt;
public:
iterator(const Region& r);
inline operator bool () const { return !done(); }
int iterate(Rect* rect);
private:
inline bool done() const {
return const_cast<SkRegion::Iterator&>(mIt).done();
}
};
size_t rects(Vector<Rect>& rectList) const;
// flatten/unflatten a region to/from a Parcel
status_t write(Parcel& parcel) const;
status_t read(const Parcel& parcel);
// flatten/unflatten a region to/from a raw buffer
ssize_t write(void* buffer, size_t size) const;
static ssize_t writeEmpty(void* buffer, size_t size);
ssize_t read(const void* buffer);
static bool isEmpty(void* buffer);
void dump(String8& out, const char* what, uint32_t flags=0) const;
void dump(const char* what, uint32_t flags=0) const;
private:
SkRegion mRegion;
};
Region Region::operator | (const Region& rhs) const {
return merge(rhs);
}
Region Region::operator & (const Region& rhs) const {
return intersect(rhs);
}
Region Region::operator - (const Region& rhs) const {
return subtract(rhs);
}
Region Region::operator + (const Point& pt) const {
return translate(pt.x, pt.y);
}
Region& Region::operator |= (const Region& rhs) {
return orSelf(rhs);
}
Region& Region::operator &= (const Region& rhs) {
return andSelf(rhs);
}
Region& Region::operator -= (const Region& rhs) {
return subtractSelf(rhs);
}
Region& Region::operator += (const Point& pt) {
return translateSelf(pt.x, pt.y);
}
// ---------------------------------------------------------------------------
struct region_iterator : public copybit_region_t {
region_iterator(const Region& region) : i(region) {
this->next = iterate;
}
private:
static int iterate(copybit_region_t const * self, copybit_rect_t* rect) {
return static_cast<const region_iterator*>(self)
->i.iterate(reinterpret_cast<Rect*>(rect));
}
mutable Region::iterator i;
};
// ---------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_UI_REGION_H
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