/* * 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 #include #include #include #include namespace android { // --------------------------------------------------------------------------- class SharedBuffer; class String8; // --------------------------------------------------------------------------- class Region : public LightFlattenable { public: Region(); Region(const Region& rhs); explicit Region(const Rect& rhs); ~Region(); Region& operator = (const Region& rhs); inline bool isEmpty() const { return getBounds().isEmpty(); } inline bool isRect() const { return mStorage.size() == 1; } inline Rect getBounds() const { return mStorage[mStorage.size() - 1]; } inline Rect bounds() const { return getBounds(); } // the region becomes its bounds Region& makeBoundsSelf(); void clear(); void set(const Rect& r); void set(uint32_t w, uint32_t h); Region& orSelf(const Rect& rhs); Region& xorSelf(const Rect& rhs); Region& andSelf(const Rect& rhs); Region& subtractSelf(const Rect& rhs); // boolean operators, applied on this Region& orSelf(const Region& rhs); Region& xorSelf(const Region& rhs); Region& andSelf(const Region& rhs); Region& subtractSelf(const Region& rhs); // boolean operators const Region merge(const Rect& rhs) const; const Region mergeExclusive(const Rect& rhs) const; const Region intersect(const Rect& rhs) const; const Region subtract(const Rect& rhs) const; // boolean operators const Region merge(const Region& rhs) const; const Region mergeExclusive(const Region& rhs) const; const Region intersect(const Region& rhs) const; const Region subtract(const Region& rhs) const; // these translate rhs first Region& translateSelf(int dx, int dy); Region& orSelf(const Region& rhs, int dx, int dy); Region& xorSelf(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); // these translate rhs first const Region translate(int dx, int dy) const; const Region merge(const Region& rhs, int dx, int dy) const; const Region mergeExclusive(const Region& rhs, int dx, int dy) const; const Region intersect(const Region& rhs, int dx, int dy) const; const Region subtract(const Region& rhs, int dx, int dy) const; // convenience operators overloads inline const Region operator | (const Region& rhs) const; inline const Region operator ^ (const Region& rhs) const; inline const Region operator & (const Region& rhs) const; inline const Region operator - (const Region& rhs) const; inline const 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 Region& rhs); inline Region& operator += (const Point& pt); /* various ways to access the rectangle list */ // STL-like iterators typedef Rect const* const_iterator; const_iterator begin() const; const_iterator end() const; // returns an array of rect which has the same life-time has this // Region object. Rect const* getArray(size_t* count) const; // returns a SharedBuffer as well as the number of rects. // ownership is transfered to the caller. // the caller must call SharedBuffer::release() to free the memory. SharedBuffer const* getSharedBuffer(size_t* count) const; /* no user serviceable parts here... */ // add a rectangle to the internal list. This rectangle must // be sorted in Y and X and must not make the region invalid. void addRectUnchecked(int l, int t, int r, int b); inline bool isFixedSize() const { return false; } size_t getSize() const; status_t flatten(void* buffer) const; status_t unflatten(void const* buffer, size_t size); void dump(String8& out, const char* what, uint32_t flags=0) const; void dump(const char* what, uint32_t flags=0) const; private: class rasterizer; friend class rasterizer; Region& operationSelf(const Rect& r, int op); Region& operationSelf(const Region& r, int op); Region& operationSelf(const Region& r, int dx, int dy, int op); const Region operation(const Rect& rhs, int op) const; const Region operation(const Region& rhs, int op) const; const Region operation(const Region& rhs, int dx, int dy, int op) const; static void boolean_operation(int op, Region& dst, const Region& lhs, const Region& rhs, int dx, int dy); static void boolean_operation(int op, Region& dst, const Region& lhs, const Rect& rhs, int dx, int dy); static void boolean_operation(int op, Region& dst, const Region& lhs, const Region& rhs); static void boolean_operation(int op, Region& dst, const Region& lhs, const Rect& rhs); static void translate(Region& reg, int dx, int dy); static void translate(Region& dst, const Region& reg, int dx, int dy); static bool validate(const Region& reg, const char* name); // mStorage is a (manually) sorted array of Rects describing the region // with an extra Rect as the last element which is set to the // bounds of the region. However, if the region is // a simple Rect then mStorage contains only that rect. Vector mStorage; }; const Region Region::operator | (const Region& rhs) const { return merge(rhs); } const Region Region::operator ^ (const Region& rhs) const { return mergeExclusive(rhs); } const Region Region::operator & (const Region& rhs) const { return intersect(rhs); } const Region Region::operator - (const Region& rhs) const { return subtract(rhs); } const 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 xorSelf(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); } // --------------------------------------------------------------------------- }; // namespace android #endif // ANDROID_UI_REGION_H