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/*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*/
/** \file
* \ingroup GHOST
*/
#include "GHOST_Rect.h"
void GHOST_Rect::inset(GHOST_TInt32 i)
{
if (i > 0) {
// Grow the rectangle
m_l -= i;
m_r += i;
m_t -= i;
m_b += i;
}
else if (i < 0) {
// Shrink the rectangle, check for insets larger than half the size
GHOST_TInt32 i2 = i * 2;
if (getWidth() > i2) {
m_l += i;
m_r -= i;
}
else {
m_l = m_l + ((m_r - m_l) / 2);
m_r = m_l;
}
if (getHeight() > i2) {
m_t += i;
m_b -= i;
}
else {
m_t = m_t + ((m_b - m_t) / 2);
m_b = m_t;
}
}
}
GHOST_TVisibility GHOST_Rect::getVisibility(GHOST_Rect &r) const
{
bool lt = isInside(r.m_l, r.m_t);
bool rt = isInside(r.m_r, r.m_t);
bool lb = isInside(r.m_l, r.m_b);
bool rb = isInside(r.m_r, r.m_b);
GHOST_TVisibility v;
if (lt && rt && lb && rb) {
// All points inside, rectangle is inside this
v = GHOST_kFullyVisible;
}
else if (!(lt || rt || lb || rb)) {
// None of the points inside
// Check to see whether the rectangle is larger than this one
if ((r.m_l < m_l) && (r.m_t < m_t) && (r.m_r > m_r) && (r.m_b > m_b)) {
v = GHOST_kPartiallyVisible;
}
else {
v = GHOST_kNotVisible;
}
}
else {
// Some of the points inside, rectangle is partially inside
v = GHOST_kPartiallyVisible;
}
return v;
}
void GHOST_Rect::setCenter(GHOST_TInt32 cx, GHOST_TInt32 cy)
{
GHOST_TInt32 offset = cx - (m_l + (m_r - m_l) / 2);
m_l += offset;
m_r += offset;
offset = cy - (m_t + (m_b - m_t) / 2);
m_t += offset;
m_b += offset;
}
void GHOST_Rect::setCenter(GHOST_TInt32 cx, GHOST_TInt32 cy, GHOST_TInt32 w, GHOST_TInt32 h)
{
long w_2, h_2;
w_2 = w >> 1;
h_2 = h >> 1;
m_l = cx - w_2;
m_t = cy - h_2;
m_r = m_l + w;
m_b = m_t + h;
}
bool GHOST_Rect::clip(GHOST_Rect &r) const
{
bool clipped = false;
if (r.m_l < m_l) {
r.m_l = m_l;
clipped = true;
}
if (r.m_t < m_t) {
r.m_t = m_t;
clipped = true;
}
if (r.m_r > m_r) {
r.m_r = m_r;
clipped = true;
}
if (r.m_b > m_b) {
r.m_b = m_b;
clipped = true;
}
return clipped;
}
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