зеркало из https://github.com/mozilla/pjs.git
151 строка
4.1 KiB
C++
151 строка
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Novell code.
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*
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* The Initial Developer of the Original Code is Novell Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Robert O'Callahan (rocallahan@novell.com)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "gfxRect.h"
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#include "nsMathUtils.h"
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static PRBool
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WithinEpsilonOfInteger(gfxFloat aX, gfxFloat aEpsilon)
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{
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return fabs(NS_round(aX) - aX) <= fabs(aEpsilon);
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}
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PRBool
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gfxRect::WithinEpsilonOfIntegerPixels(gfxFloat aEpsilon) const
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{
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NS_ASSERTION(-0.5 < aEpsilon && aEpsilon < 0.5, "Nonsense epsilon value");
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return (WithinEpsilonOfInteger(x, aEpsilon) &&
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WithinEpsilonOfInteger(y, aEpsilon) &&
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WithinEpsilonOfInteger(width, aEpsilon) &&
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WithinEpsilonOfInteger(height, aEpsilon));
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}
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void
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gfxRect::Round()
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{
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// Note that don't use NS_round here. See the comment for this method in gfxRect.h
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gfxFloat x0 = NS_floor(X() + 0.5);
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gfxFloat y0 = NS_floor(Y() + 0.5);
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gfxFloat x1 = NS_floor(XMost() + 0.5);
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gfxFloat y1 = NS_floor(YMost() + 0.5);
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x = x0;
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y = y0;
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width = x1 - x0;
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height = y1 - y0;
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}
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void
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gfxRect::RoundIn()
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{
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gfxFloat x0 = NS_ceil(X());
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gfxFloat y0 = NS_ceil(Y());
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gfxFloat x1 = NS_floor(XMost());
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gfxFloat y1 = NS_floor(YMost());
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x = x0;
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y = y0;
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width = x1 - x0;
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height = y1 - y0;
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}
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void
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gfxRect::RoundOut()
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{
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gfxFloat x0 = NS_floor(X());
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gfxFloat y0 = NS_floor(Y());
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gfxFloat x1 = NS_ceil(XMost());
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gfxFloat y1 = NS_ceil(YMost());
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x = x0;
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y = y0;
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width = x1 - x0;
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height = y1 - y0;
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}
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/* Clamp r to CAIRO_COORD_MIN .. CAIRO_COORD_MAX
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* these are to be device coordinates.
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*
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* Cairo is currently using 24.8 fixed point,
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* so -2^24 .. 2^24-1 is our valid
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*/
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#define CAIRO_COORD_MAX (16777215.0)
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#define CAIRO_COORD_MIN (-16777216.0)
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void
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gfxRect::Condition()
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{
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// if either x or y is way out of bounds;
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// note that we don't handle negative w/h here
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if (x > CAIRO_COORD_MAX) {
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x = CAIRO_COORD_MAX;
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width = 0.0;
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}
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if (y > CAIRO_COORD_MAX) {
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y = CAIRO_COORD_MAX;
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height = 0.0;
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}
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if (x < CAIRO_COORD_MIN) {
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width += x - CAIRO_COORD_MIN;
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if (width < 0.0)
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width = 0.0;
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x = CAIRO_COORD_MIN;
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}
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if (y < CAIRO_COORD_MIN) {
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height += y - CAIRO_COORD_MIN;
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if (height < 0.0)
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height = 0.0;
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y = CAIRO_COORD_MIN;
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}
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if (x + width > CAIRO_COORD_MAX) {
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width = CAIRO_COORD_MAX - x;
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}
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if (y + height > CAIRO_COORD_MAX) {
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height = CAIRO_COORD_MAX - y;
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}
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}
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