зеркало из https://github.com/mozilla/gecko-dev.git
93 строки
2.7 KiB
C++
93 строки
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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 Mozilla Corporation code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Bas Schouten <bschouten@mozilla.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 "Matrix.h"
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#include <math.h>
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namespace mozilla {
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namespace gfx {
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Matrix
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Matrix::Rotation(Float aAngle)
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{
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Matrix newMatrix;
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Float s = sin(aAngle);
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Float c = cos(aAngle);
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newMatrix._11 = c;
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newMatrix._12 = s;
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newMatrix._21 = -s;
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newMatrix._22 = c;
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return newMatrix;
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}
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Rect
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Matrix::TransformBounds(const Rect &aRect) const
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{
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int i;
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Point quad[4];
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Float min_x, max_x;
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Float min_y, max_y;
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quad[0] = *this * aRect.TopLeft();
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quad[1] = *this * aRect.TopRight();
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quad[2] = *this * aRect.BottomLeft();
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quad[3] = *this * aRect.BottomRight();
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min_x = max_x = quad[0].x;
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min_y = max_y = quad[0].y;
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for (i = 1; i < 4; i++) {
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if (quad[i].x < min_x)
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min_x = quad[i].x;
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if (quad[i].x > max_x)
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max_x = quad[i].x;
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if (quad[i].y < min_y)
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min_y = quad[i].y;
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if (quad[i].y > max_y)
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max_y = quad[i].y;
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}
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return Rect(min_x, min_y, max_x - min_x, max_y - min_y);
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}
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}
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}
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