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257 lines
8.9 KiB
C
257 lines
8.9 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 Oracle Corporation code.
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*
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* The Initial Developer of the Original Code is Oracle Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Stuart Parmenter <pavlov@pavlov.net>
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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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#ifndef GFX_RECT_H
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#define GFX_RECT_H
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#include "gfxTypes.h"
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#include "gfxPoint.h"
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#include "nsDebug.h"
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struct THEBES_API gfxCorner {
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typedef int Corner;
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enum {
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// this order is important!
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TOP_LEFT = 0,
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TOP_RIGHT = 1,
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BOTTOM_RIGHT = 2,
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BOTTOM_LEFT = 3,
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NUM_CORNERS = 4
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};
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};
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struct THEBES_API gfxRect {
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// pt? point?
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gfxPoint pos;
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gfxSize size;
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gfxRect() {}
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gfxRect(const gfxRect& s) : pos(s.pos), size(s.size) {}
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gfxRect(const gfxPoint& _pos, const gfxSize& _size) : pos(_pos), size(_size) {}
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gfxRect(gfxFloat _x, gfxFloat _y, gfxFloat _width, gfxFloat _height) :
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pos(_x, _y), size(_width, _height) {}
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int operator==(const gfxRect& s) const {
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return (pos == s.pos) && (size == s.size);
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}
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int operator!=(const gfxRect& s) const {
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return (pos != s.pos) || (size != s.size);
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}
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const gfxRect& MoveBy(const gfxPoint& aPt) {
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pos = pos + aPt;
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return *this;
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}
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gfxRect operator+(const gfxPoint& aPt) const {
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return gfxRect(pos + aPt, size);
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}
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gfxRect operator-(const gfxPoint& aPt) const {
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return gfxRect(pos - aPt, size);
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}
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gfxFloat Width() const { return size.width; }
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gfxFloat Height() const { return size.height; }
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gfxFloat X() const { return pos.x; }
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gfxFloat Y() const { return pos.y; }
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gfxFloat XMost() const { return pos.x + size.width; }
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gfxFloat YMost() const { return pos.y + size.height; }
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PRBool IsEmpty() const { return size.width <= 0 || size.height <= 0; }
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gfxRect Intersect(const gfxRect& aRect) const;
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gfxRect Union(const gfxRect& aRect) const;
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PRBool Contains(const gfxRect& aRect) const;
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PRBool Contains(const gfxPoint& aPoint) const;
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// XXX figure out what methods (intersect, union, etc) we use and add them.
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gfxPoint TopLeft() { return pos; }
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gfxPoint BottomRight() { return gfxPoint(XMost(), YMost()); }
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void Inset(gfxFloat k) {
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pos.x += k;
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pos.y += k;
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size.width = PR_MAX(0.0, size.width - k * 2.0);
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size.height = PR_MAX(0.0, size.height - k * 2.0);
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}
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void Inset(gfxFloat top, gfxFloat right, gfxFloat bottom, gfxFloat left) {
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pos.x += left;
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pos.y += top;
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size.width = PR_MAX(0.0, size.width - (right+left));
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size.height = PR_MAX(0.0, size.height - (bottom+top));
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}
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void Inset(const gfxFloat *sides) {
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Inset(sides[0], sides[1], sides[2], sides[3]);
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}
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void Outset(gfxFloat k) {
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pos.x -= k;
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pos.y -= k;
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size.width = PR_MAX(0.0, size.width + k * 2.0);
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size.height = PR_MAX(0.0, size.height + k * 2.0);
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}
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void Outset(gfxFloat top, gfxFloat right, gfxFloat bottom, gfxFloat left) {
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pos.x -= left;
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pos.y -= top;
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size.width = PR_MAX(0.0, size.width + (right+left));
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size.height = PR_MAX(0.0, size.height + (bottom+top));
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}
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void Outset(const gfxFloat *sides) {
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Outset(sides[0], sides[1], sides[2], sides[3]);
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}
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// Round the rectangle edges to integer coordinates, such that the rounded
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// rectangle has the same set of pixel centers as the original rectangle.
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// Edges at offset 0.5 round up.
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// Suitable for most places where integral device coordinates
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// are needed, but note that any translation should be applied first to
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// avoid pixel rounding errors.
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// Note that this is *not* rounding to nearest integer if the values are negative.
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// They are always rounding as floor(n + 0.5).
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// See https://bugzilla.mozilla.org/show_bug.cgi?id=410748#c14
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// If you need similar method which is using NS_round(), you should create
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// new |RoundAwayFromZero()| method.
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void Round();
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// Snap the rectangle edges to integer coordinates, such that the
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// original rectangle contains the resulting rectangle.
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void RoundIn();
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// Snap the rectangle edges to integer coordinates, such that the
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// resulting rectangle contains the original rectangle.
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void RoundOut();
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// grabbing specific points
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gfxPoint TopLeft() const { return gfxPoint(pos); }
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gfxPoint TopRight() const { return pos + gfxSize(size.width, 0.0); }
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gfxPoint BottomLeft() const { return pos + gfxSize(0.0, size.height); }
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gfxPoint BottomRight() const { return pos + size; }
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gfxPoint Corner(gfxCorner::Corner corner) const {
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switch (corner) {
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case gfxCorner::TOP_LEFT: return TopLeft();
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case gfxCorner::TOP_RIGHT: return TopRight();
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case gfxCorner::BOTTOM_LEFT: return BottomLeft();
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case gfxCorner::BOTTOM_RIGHT: return BottomRight();
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default:
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NS_ERROR("Invalid corner!");
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break;
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}
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return gfxPoint(0.0, 0.0);
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}
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/* Conditions this border to Cairo's max coordinate space.
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* The caller can check IsEmpty() after Condition() -- if it's TRUE,
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* the caller can possibly avoid doing any extra rendering.
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*/
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void Condition();
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void Scale(gfxFloat k) {
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NS_ASSERTION(k >= 0.0, "Invalid (negative) scale factor");
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pos.x *= k;
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pos.y *= k;
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size.width *= k;
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size.height *= k;
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}
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void Scale(gfxFloat sx, gfxFloat sy) {
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NS_ASSERTION(sx >= 0.0, "Invalid (negative) scale factor");
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NS_ASSERTION(sy >= 0.0, "Invalid (negative) scale factor");
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pos.x *= sx;
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pos.y *= sy;
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size.width *= sx;
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size.height *= sy;
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}
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void ScaleInverse(gfxFloat k) {
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NS_ASSERTION(k > 0.0, "Invalid (negative) scale factor");
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pos.x /= k;
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pos.y /= k;
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size.width /= k;
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size.height /= k;
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}
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};
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struct THEBES_API gfxCornerSizes {
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gfxSize sizes[gfxCorner::NUM_CORNERS];
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gfxCornerSizes () { }
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gfxCornerSizes (gfxFloat v) {
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for (int i = 0; i < gfxCorner::NUM_CORNERS; i++)
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sizes[i].SizeTo(v, v);
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}
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gfxCornerSizes (gfxFloat tl, gfxFloat tr, gfxFloat br, gfxFloat bl) {
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sizes[gfxCorner::TOP_LEFT].SizeTo(tl, tl);
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sizes[gfxCorner::TOP_RIGHT].SizeTo(tr, tr);
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sizes[gfxCorner::BOTTOM_RIGHT].SizeTo(br, br);
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sizes[gfxCorner::BOTTOM_LEFT].SizeTo(bl, bl);
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}
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gfxCornerSizes (const gfxSize& tl, const gfxSize& tr, const gfxSize& br, const gfxSize& bl) {
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sizes[gfxCorner::TOP_LEFT] = tl;
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sizes[gfxCorner::TOP_RIGHT] = tr;
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sizes[gfxCorner::BOTTOM_RIGHT] = br;
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sizes[gfxCorner::BOTTOM_LEFT] = bl;
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}
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const gfxSize& operator[] (gfxCorner::Corner index) const {
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return sizes[index];
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}
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gfxSize& operator[] (gfxCorner::Corner index) {
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return sizes[index];
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}
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const gfxSize TopLeft() const { return sizes[gfxCorner::TOP_LEFT]; }
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gfxSize& TopLeft() { return sizes[gfxCorner::TOP_LEFT]; }
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const gfxSize TopRight() const { return sizes[gfxCorner::TOP_RIGHT]; }
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gfxSize& TopRight() { return sizes[gfxCorner::TOP_RIGHT]; }
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const gfxSize BottomLeft() const { return sizes[gfxCorner::BOTTOM_LEFT]; }
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gfxSize& BottomLeft() { return sizes[gfxCorner::BOTTOM_LEFT]; }
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const gfxSize BottomRight() const { return sizes[gfxCorner::BOTTOM_RIGHT]; }
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gfxSize& BottomRight() { return sizes[gfxCorner::BOTTOM_RIGHT]; }
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};
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#endif /* GFX_RECT_H */
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