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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef QDENGINE_SYSTEM_GRAPHICS_GR_SCREEN_REGION_H
#define QDENGINE_SYSTEM_GRAPHICS_GR_SCREEN_REGION_H
namespace QDEngine {
#define grScreenRegion_EMPTY grScreenRegion(0, 0, 0, 0)
//! Прямоугольная область на экране.
class grScreenRegion {
public:
grScreenRegion() : _x(0), _y(0), _size_x(0), _size_y(0) {}
grScreenRegion(int x, int y, int sx, int sy) : _x(x), _y(y), _size_x(sx), _size_y(sy) {}
bool operator == (const grScreenRegion ®) const {
if (_x == reg._x && _y == reg._y && _size_x == reg._size_x && _size_y == reg._size_y)
return true;
if (is_empty() && reg.is_empty())
return true;
return false;
}
bool operator != (const grScreenRegion ®) const {
if (is_empty() && reg.is_empty())
return false;
if (_x != reg._x || _y != reg._y || _size_x != reg._size_x || _size_y != reg._size_y)
return true;
return false;
}
grScreenRegion &operator += (const grScreenRegion ®) {
if (reg.is_empty()) return *this;
if (is_empty()) {
*this = reg;
return *this;
}
int x0 = (min_x() < reg.min_x()) ? min_x() : reg.min_x();
int x1 = (max_x() > reg.max_x()) ? max_x() : reg.max_x();
int y0 = (min_y() < reg.min_y()) ? min_y() : reg.min_y();
int y1 = (max_y() > reg.max_y()) ? max_y() : reg.max_y();
_x = (x0 + x1) / 2;
_y = (y0 + y1) / 2;
_size_x = x1 - x0;
_size_y = y1 - y0;
return *this;
}
int x() const {
return _x;
}
int y() const {
return _y;
}
int size_x() const {
return _size_x;
}
int size_y() const {
return _size_y;
}
int min_x() const {
return _x - _size_x / 2;
}
int max_x() const {
return _x + _size_x / 2;
}
int min_y() const {
return _y - _size_y / 2;
}
int max_y() const {
return _y + _size_y / 2;
}
void move(int dx, int dy) {
_x += dx;
_y += dy;
}
bool is_empty() const {
return (!_size_x || !_size_y);
}
bool is_inside(int x, int y) const {
if (x >= min_x() && x < max_x() && y >= min_y() && y < max_y()) return true;
return false;
}
void clear() {
_size_x = 0;
}
static const grScreenRegion EMPTY;
private:
//! координаты центра области
int _x;
int _y;
int _size_x;
int _size_y;
};
} // namespace QDEngine
#endif // QDENGINE_SYSTEM_GRAPHICS_GR_SCREEN_REGION_H
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