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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.gfx;
import android.graphics.Point;
import android.graphics.PointF;
import android.graphics.Rect;
import android.graphics.RectF;
import org.mozilla.gecko.util.FloatUtils;
public final class RectUtils {
private RectUtils() {}
public static RectF expand(RectF rect, float moreWidth, float moreHeight) {
float halfMoreWidth = moreWidth / 2;
float halfMoreHeight = moreHeight / 2;
return new RectF(rect.left - halfMoreWidth,
rect.top - halfMoreHeight,
rect.right + halfMoreWidth,
rect.bottom + halfMoreHeight);
}
public static RectF contract(RectF rect, float lessWidth, float lessHeight) {
float halfLessWidth = lessWidth / 2.0f;
float halfLessHeight = lessHeight / 2.0f;
return new RectF(rect.left + halfLessWidth,
rect.top + halfLessHeight,
rect.right - halfLessWidth,
rect.bottom - halfLessHeight);
}
public static RectF intersect(RectF one, RectF two) {
float left = Math.max(one.left, two.left);
float top = Math.max(one.top, two.top);
float right = Math.min(one.right, two.right);
float bottom = Math.min(one.bottom, two.bottom);
return new RectF(left, top, Math.max(right, left), Math.max(bottom, top));
}
public static RectF scale(RectF rect, float scale) {
float x = rect.left * scale;
float y = rect.top * scale;
return new RectF(x, y,
x + (rect.width() * scale),
y + (rect.height() * scale));
}
public static RectF inverseScale(RectF rect, float scale) {
float x = rect.left / scale;
float y = rect.top / scale;
return new RectF(x, y,
x + (rect.width() / scale),
y + (rect.height() / scale));
}
/** Returns the nearest integer rect of the given rect. */
public static Rect round(RectF rect) {
Rect r = new Rect();
round(rect, r);
return r;
}
public static void round(RectF rect, Rect dest) {
dest.set(Math.round(rect.left), Math.round(rect.top),
Math.round(rect.right), Math.round(rect.bottom));
}
public static Rect roundIn(RectF rect) {
return new Rect((int)Math.ceil(rect.left), (int)Math.ceil(rect.top),
(int)Math.floor(rect.right), (int)Math.floor(rect.bottom));
}
public static IntSize getSize(Rect rect) {
return new IntSize(rect.width(), rect.height());
}
public static Point getOrigin(Rect rect) {
return new Point(rect.left, rect.top);
}
public static PointF getOrigin(RectF rect) {
return new PointF(rect.left, rect.top);
}
public static boolean fuzzyEquals(RectF a, RectF b) {
if (a == null && b == null)
return true;
else
return a != null && b != null
&& FloatUtils.fuzzyEquals(a.top, b.top)
&& FloatUtils.fuzzyEquals(a.left, b.left)
&& FloatUtils.fuzzyEquals(a.right, b.right)
&& FloatUtils.fuzzyEquals(a.bottom, b.bottom);
}
/**
* Assign rectangle values from source to target.
*/
public static void assign(final RectF target, final RectF source)
{
target.left = source.left;
target.top = source.top;
target.right = source.right;
target.bottom = source.bottom;
}
}
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