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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2004 The ScummVM project
*
* 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 2
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#ifndef COMMON_RECT_H
#define COMMON_RECT_H
#include "common/scummsys.h"
#include "common/util.h"
namespace Common {
/*! @brief simple class for handling both 2D position and size
This small class is an helper for position and size values.
*/
struct Point {
int16 x; //!< The horizontal part of the point
int16 y; //!< The vertical part of the point
Point() : x(0), y(0) {};
Point(const Point & p) : x(p.x), y(p.y) {};
explicit Point(int16 x1, int16 y1) : x(x1), y(y1) {};
Point & operator=(const Point & p) { x = p.x; y = p.y; return *this; };
bool operator==(const Point & p) const { return x == p.x && y == p.y; };
bool operator!=(const Point & p) const { return x != p.x || y != p.y; };
};
/*! @brief simple class for handling a rectangular zone.
This small class is an helper for rectangles.
It is mostly used by the blitter class.
*/
struct Rect {
int16 top, left; //!< The point at the top left of the rectangle (part of the rect).
int16 bottom, right; //!< The point at the bottom right of the rectangle (not part of the rect).
Rect() : top(0), left(0), bottom(0), right(0) {}
Rect(int16 w, int16 h) : top(0), left(0), bottom(h), right(w) {}
Rect(int16 x1, int16 y1, int16 x2, int16 y2) : top(y1), left(x1), bottom(y2), right(x2) {
assert(isValidRect());
}
int16 width() const { return right - left; }
int16 height() const { return bottom - top; }
/*! @brief check if given position is inside this rectangle
@param x the horizontal position to check
@param y the vertical position to check
@return true if the given position is inside this rectangle, false otherwise
*/
bool contains(int16 x, int16 y) const {
return (left <= x) && (x < right) && (top <= y) && (y < bottom);
}
/*! @brief check if given point is inside this rectangle
@param p the point to check
@return true if the given point is inside this rectangle, false otherwise
*/
bool contains(const Point & p) const {
return contains(p.x, p.y);
}
/*! @brief check if given rectangle intersects with this rectangle
@param r the rectangle to check
@return true if the given rectangle is inside the rectangle, false otherwise
*/
bool intersects(const Rect & r) const {
return (left < r.right) && (r.left < right) && (top < r.bottom) && (r.top < bottom);
}
/*! @brief extend this rectangle so that it contains r
@param r the rectangle to extend by
*/
void extend(const Rect & r) {
left = MIN(left, r.left);
right = MAX(right, r.right);
top = MIN(top, r.top);
bottom = MAX(bottom, r.bottom);
}
/*! @brief extend this rectangle in all four directions by the given number of pixels
@param offset the size to grow by
*/
void grow(int16 offset) {
top -= offset;
left -= offset;
bottom += offset;
right += offset;
}
void clip(const Rect & r) {
assert(isValidRect());
assert(r.isValidRect());
if (top < r.top) top = r.top;
else if (top > r.bottom) top = r.bottom;
if (left < r.left) left = r.left;
else if (left > r.right) left = r.right;
if (bottom > r.bottom) bottom = r.bottom;
else if (bottom < r.top) bottom = r.top;
if (right > r.right) right = r.right;
else if (right < r.left) right = r.left;
}
void clip(int maxw, int maxh) {
clip(Rect(0, 0, maxw, maxh));
}
bool isValidRect() const {
return (left <= right && top <= bottom);
}
void moveTo(int16 x, int16 y) {
bottom += y - top;
right += x - left;
top = y;
left = x;
}
void moveTo(const Point & p) {
moveTo(p.x, p.y);
}
};
} // End of namespace Common
#endif
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