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