/* | |
* Copyright (C) 2003, 2006, 2007 Apple Inc. All rights reserved. | |
* Copyright (C) 2005 Nokia. All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions | |
* are met: | |
* 1. Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright | |
* notice, this list of conditions and the following disclaimer in the | |
* documentation and/or other materials provided with the distribution. | |
* | |
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
*/ | |
#include "config.h" | |
#include "FloatRect.h" | |
#include "FloatConversion.h" | |
#include "IntRect.h" | |
#include <algorithm> | |
#include <math.h> | |
using std::max; | |
using std::min; | |
namespace WebCore { | |
FloatRect::FloatRect(const IntRect& r) : m_location(r.location()), m_size(r.size()) | |
{ | |
} | |
FloatRect FloatRect::narrowPrecision(double x, double y, double width, double height) | |
{ | |
return FloatRect(narrowPrecisionToFloat(x), narrowPrecisionToFloat(y), narrowPrecisionToFloat(width), narrowPrecisionToFloat(height)); | |
} | |
bool FloatRect::intersects(const FloatRect& other) const | |
{ | |
// Checking emptiness handles negative widths as well as zero. | |
return !isEmpty() && !other.isEmpty() | |
&& x() < other.right() && other.x() < right() | |
&& y() < other.bottom() && other.y() < bottom(); | |
} | |
bool FloatRect::contains(const FloatRect& other) const | |
{ | |
return x() <= other.x() && right() >= other.right() | |
&& y() <= other.y() && bottom() >= other.bottom(); | |
} | |
void FloatRect::intersect(const FloatRect& other) | |
{ | |
float l = max(x(), other.x()); | |
float t = max(y(), other.y()); | |
float r = min(right(), other.right()); | |
float b = min(bottom(), other.bottom()); | |
// Return a clean empty rectangle for non-intersecting cases. | |
if (l >= r || t >= b) { | |
l = 0; | |
t = 0; | |
r = 0; | |
b = 0; | |
} | |
m_location.setX(l); | |
m_location.setY(t); | |
m_size.setWidth(r - l); | |
m_size.setHeight(b - t); | |
} | |
void FloatRect::unite(const FloatRect& other) | |
{ | |
// Handle empty special cases first. | |
if (other.isEmpty()) | |
return; | |
if (isEmpty()) { | |
*this = other; | |
return; | |
} | |
float l = min(x(), other.x()); | |
float t = min(y(), other.y()); | |
float r = max(right(), other.right()); | |
float b = max(bottom(), other.bottom()); | |
m_location.setX(l); | |
m_location.setY(t); | |
m_size.setWidth(r - l); | |
m_size.setHeight(b - t); | |
} | |
void FloatRect::scale(float sx, float sy) | |
{ | |
m_location.setX(x() * sx); | |
m_location.setY(y() * sy); | |
m_size.setWidth(width() * sx); | |
m_size.setHeight(height() * sy); | |
} | |
IntRect enclosingIntRect(const FloatRect& rect) | |
{ | |
int l = static_cast<int>(floorf(rect.x())); | |
int t = static_cast<int>(floorf(rect.y())); | |
int r = static_cast<int>(ceilf(rect.right())); | |
int b = static_cast<int>(ceilf(rect.bottom())); | |
return IntRect(l, t, r - l, b - t); | |
} | |
FloatRect mapRect(const FloatRect& r, const FloatRect& srcRect, const FloatRect& destRect) | |
{ | |
if (srcRect.width() == 0 || srcRect.height() == 0) | |
return FloatRect(); | |
float widthScale = destRect.width() / srcRect.width(); | |
float heightScale = destRect.height() / srcRect.height(); | |
return FloatRect(destRect.x() + (r.x() - srcRect.x()) * widthScale, | |
destRect.y() + (r.y() - srcRect.y()) * heightScale, | |
r.width() * widthScale, r.height() * heightScale); | |
} | |
} |