[30] | 1 | /* This notice must be untouched at all times. |
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| 2 | |
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| 3 | wz_jsgraphics.js v. 3.02 |
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| 4 | The latest version is available at |
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| 5 | http://www.walterzorn.com |
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| 6 | or http://www.devira.com |
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| 7 | or http://www.walterzorn.de |
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| 8 | |
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| 9 | Copyright (c) 2002-2004 Walter Zorn. All rights reserved. |
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| 10 | Created 3. 11. 2002 by Walter Zorn (Web: http://www.walterzorn.com ) |
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| 11 | Last modified: 26. 10. 2007 |
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| 12 | |
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| 13 | Performance optimizations for Internet Explorer |
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| 14 | by Thomas Frank and John Holdsworth. |
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| 15 | fillPolygon method implemented by Matthieu Haller. |
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| 16 | |
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| 17 | High Performance JavaScript Graphics Library. |
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| 18 | Provides methods |
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| 19 | - to draw lines, rectangles, ellipses, polygons |
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| 20 | with specifiable line thickness, |
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| 21 | - to fill rectangles, polygons, ellipses and arcs |
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| 22 | - to draw text. |
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| 23 | NOTE: Operations, functions and branching have rather been optimized |
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| 24 | to efficiency and speed than to shortness of source code. |
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| 25 | |
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| 26 | LICENSE: LGPL |
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| 27 | |
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| 28 | This library is free software; you can redistribute it and/or |
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| 29 | modify it under the terms of the GNU Lesser General Public |
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| 30 | License (LGPL) as published by the Free Software Foundation; either |
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| 31 | version 2.1 of the License, or (at your option) any later version. |
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| 32 | |
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| 33 | This library is distributed in the hope that it will be useful, |
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| 34 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 35 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 36 | Lesser General Public License for more details. |
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| 37 | |
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| 38 | You should have received a copy of the GNU Lesser General Public |
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| 39 | License along with this library; if not, write to the Free Software |
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| 40 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA, |
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| 41 | or see http://www.gnu.org/copyleft/lesser.html |
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| 42 | */ |
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| 43 | |
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| 44 | |
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| 45 | var jg_ok, jg_ie, jg_fast, jg_dom, jg_moz; |
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| 46 | |
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| 47 | |
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| 48 | function _chkDHTM(x, i) |
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| 49 | { |
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| 50 | x = document.body || null; |
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| 51 | jg_ie = x && typeof x.insertAdjacentHTML != "undefined" && document.createElement; |
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| 52 | jg_dom = (x && !jg_ie && |
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| 53 | typeof x.appendChild != "undefined" && |
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| 54 | typeof document.createRange != "undefined" && |
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| 55 | typeof (i = document.createRange()).setStartBefore != "undefined" && |
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| 56 | typeof i.createContextualFragment != "undefined"); |
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| 57 | jg_fast = jg_ie && document.all && !window.opera; |
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| 58 | jg_moz = jg_dom && typeof x.style.MozOpacity != "undefined"; |
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| 59 | jg_ok = !!(jg_ie || jg_dom); |
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| 60 | } |
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| 61 | |
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| 62 | function _pntCnvDom() |
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| 63 | { |
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| 64 | var x = this.wnd.document.createRange(); |
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| 65 | x.setStartBefore(this.cnv); |
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| 66 | x = x.createContextualFragment(jg_fast? this._htmRpc() : this.htm); |
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| 67 | if(this.cnv) this.cnv.appendChild(x); |
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| 68 | this.htm = ""; |
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| 69 | } |
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| 70 | |
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| 71 | function _pntCnvIe() |
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| 72 | { |
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| 73 | if(this.cnv) this.cnv.insertAdjacentHTML("BeforeEnd", jg_fast? this._htmRpc() : this.htm); |
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| 74 | this.htm = ""; |
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| 75 | } |
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| 76 | |
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| 77 | function _pntDoc() |
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| 78 | { |
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| 79 | this.wnd.document.write(jg_fast? this._htmRpc() : this.htm); |
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| 80 | this.htm = ''; |
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| 81 | } |
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| 82 | |
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| 83 | function _pntN() |
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| 84 | { |
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| 85 | ; |
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| 86 | } |
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| 87 | |
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| 88 | function _mkDiv(x, y, w, h) |
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| 89 | { |
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| 90 | this.htm += '<div style="position:absolute;'+ |
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| 91 | 'left:' + x + 'px;'+ |
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| 92 | 'top:' + y + 'px;'+ |
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| 93 | 'width:' + w + 'px;'+ |
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| 94 | 'height:' + h + 'px;'+ |
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| 95 | 'clip:rect(0,'+w+'px,'+h+'px,0);'+ |
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| 96 | 'background-color:' + this.color + |
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| 97 | (!jg_moz? ';overflow:hidden' : '')+ |
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| 98 | ';"><\/div>'; |
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| 99 | } |
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| 100 | |
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| 101 | function _mkDivIe(x, y, w, h) |
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| 102 | { |
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| 103 | this.htm += '%%'+this.color+';'+x+';'+y+';'+w+';'+h+';'; |
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| 104 | } |
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| 105 | |
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| 106 | function _mkDivPrt(x, y, w, h) |
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| 107 | { |
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| 108 | this.htm += '<div style="position:absolute;'+ |
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| 109 | 'border-left:' + w + 'px solid ' + this.color + ';'+ |
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| 110 | 'left:' + x + 'px;'+ |
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| 111 | 'top:' + y + 'px;'+ |
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| 112 | 'width:0px;'+ |
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| 113 | 'height:' + h + 'px;'+ |
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| 114 | 'clip:rect(0,'+w+'px,'+h+'px,0);'+ |
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| 115 | 'background-color:' + this.color + |
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| 116 | (!jg_moz? ';overflow:hidden' : '')+ |
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| 117 | ';"><\/div>'; |
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| 118 | } |
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| 119 | |
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| 120 | var _regex = /%%([^;]+);([^;]+);([^;]+);([^;]+);([^;]+);/g; |
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| 121 | function _htmRpc() |
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| 122 | { |
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| 123 | return this.htm.replace( |
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| 124 | _regex, |
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| 125 | '<div style="overflow:hidden;position:absolute;background-color:'+ |
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| 126 | '$1;left:$2;top:$3;width:$4;height:$5"></div>\n'); |
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| 127 | } |
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| 128 | |
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| 129 | function _htmPrtRpc() |
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| 130 | { |
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| 131 | return this.htm.replace( |
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| 132 | _regex, |
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| 133 | '<div style="overflow:hidden;position:absolute;background-color:'+ |
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| 134 | '$1;left:$2;top:$3;width:$4;height:$5;border-left:$4px solid $1"></div>\n'); |
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| 135 | } |
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| 136 | |
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| 137 | function _mkLin(x1, y1, x2, y2) |
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| 138 | { |
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| 139 | if(x1 > x2) |
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| 140 | { |
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| 141 | var _x2 = x2; |
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| 142 | var _y2 = y2; |
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| 143 | x2 = x1; |
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| 144 | y2 = y1; |
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| 145 | x1 = _x2; |
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| 146 | y1 = _y2; |
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| 147 | } |
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| 148 | var dx = x2-x1, dy = Math.abs(y2-y1), |
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| 149 | x = x1, y = y1, |
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| 150 | yIncr = (y1 > y2)? -1 : 1; |
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| 151 | |
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| 152 | if(dx >= dy) |
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| 153 | { |
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| 154 | var pr = dy<<1, |
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| 155 | pru = pr - (dx<<1), |
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| 156 | p = pr-dx, |
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| 157 | ox = x; |
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| 158 | while(dx > 0) |
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| 159 | {--dx; |
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| 160 | ++x; |
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| 161 | if(p > 0) |
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| 162 | { |
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| 163 | this._mkDiv(ox, y, x-ox, 1); |
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| 164 | y += yIncr; |
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| 165 | p += pru; |
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| 166 | ox = x; |
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| 167 | } |
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| 168 | else p += pr; |
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| 169 | } |
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| 170 | this._mkDiv(ox, y, x2-ox+1, 1); |
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| 171 | } |
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| 172 | |
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| 173 | else |
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| 174 | { |
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| 175 | var pr = dx<<1, |
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| 176 | pru = pr - (dy<<1), |
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| 177 | p = pr-dy, |
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| 178 | oy = y; |
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| 179 | if(y2 <= y1) |
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| 180 | { |
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| 181 | while(dy > 0) |
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| 182 | {--dy; |
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| 183 | if(p > 0) |
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| 184 | { |
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| 185 | this._mkDiv(x++, y, 1, oy-y+1); |
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| 186 | y += yIncr; |
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| 187 | p += pru; |
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| 188 | oy = y; |
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| 189 | } |
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| 190 | else |
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| 191 | { |
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| 192 | y += yIncr; |
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| 193 | p += pr; |
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| 194 | } |
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| 195 | } |
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| 196 | this._mkDiv(x2, y2, 1, oy-y2+1); |
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| 197 | } |
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| 198 | else |
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| 199 | { |
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| 200 | while(dy > 0) |
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| 201 | {--dy; |
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| 202 | y += yIncr; |
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| 203 | if(p > 0) |
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| 204 | { |
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| 205 | this._mkDiv(x++, oy, 1, y-oy); |
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| 206 | p += pru; |
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| 207 | oy = y; |
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| 208 | } |
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| 209 | else p += pr; |
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| 210 | } |
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| 211 | this._mkDiv(x2, oy, 1, y2-oy+1); |
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| 212 | } |
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| 213 | } |
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| 214 | } |
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| 215 | |
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| 216 | function _mkLin2D(x1, y1, x2, y2) |
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| 217 | { |
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| 218 | if(x1 > x2) |
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| 219 | { |
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| 220 | var _x2 = x2; |
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| 221 | var _y2 = y2; |
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| 222 | x2 = x1; |
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| 223 | y2 = y1; |
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| 224 | x1 = _x2; |
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| 225 | y1 = _y2; |
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| 226 | } |
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| 227 | var dx = x2-x1, dy = Math.abs(y2-y1), |
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| 228 | x = x1, y = y1, |
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| 229 | yIncr = (y1 > y2)? -1 : 1; |
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| 230 | |
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| 231 | var s = this.stroke; |
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| 232 | if(dx >= dy) |
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| 233 | { |
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| 234 | if(dx > 0 && s-3 > 0) |
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| 235 | { |
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| 236 | var _s = (s*dx*Math.sqrt(1+dy*dy/(dx*dx))-dx-(s>>1)*dy) / dx; |
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| 237 | _s = (!(s-4)? Math.ceil(_s) : Math.round(_s)) + 1; |
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| 238 | } |
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| 239 | else var _s = s; |
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| 240 | var ad = Math.ceil(s/2); |
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| 241 | |
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| 242 | var pr = dy<<1, |
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| 243 | pru = pr - (dx<<1), |
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| 244 | p = pr-dx, |
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| 245 | ox = x; |
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| 246 | while(dx > 0) |
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| 247 | {--dx; |
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| 248 | ++x; |
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| 249 | if(p > 0) |
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| 250 | { |
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| 251 | this._mkDiv(ox, y, x-ox+ad, _s); |
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| 252 | y += yIncr; |
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| 253 | p += pru; |
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| 254 | ox = x; |
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| 255 | } |
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| 256 | else p += pr; |
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| 257 | } |
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| 258 | this._mkDiv(ox, y, x2-ox+ad+1, _s); |
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| 259 | } |
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| 260 | |
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| 261 | else |
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| 262 | { |
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| 263 | if(s-3 > 0) |
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| 264 | { |
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| 265 | var _s = (s*dy*Math.sqrt(1+dx*dx/(dy*dy))-(s>>1)*dx-dy) / dy; |
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| 266 | _s = (!(s-4)? Math.ceil(_s) : Math.round(_s)) + 1; |
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| 267 | } |
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| 268 | else var _s = s; |
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| 269 | var ad = Math.round(s/2); |
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| 270 | |
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| 271 | var pr = dx<<1, |
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| 272 | pru = pr - (dy<<1), |
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| 273 | p = pr-dy, |
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| 274 | oy = y; |
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| 275 | if(y2 <= y1) |
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| 276 | { |
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| 277 | ++ad; |
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| 278 | while(dy > 0) |
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| 279 | {--dy; |
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| 280 | if(p > 0) |
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| 281 | { |
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| 282 | this._mkDiv(x++, y, _s, oy-y+ad); |
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| 283 | y += yIncr; |
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| 284 | p += pru; |
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| 285 | oy = y; |
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| 286 | } |
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| 287 | else |
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| 288 | { |
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| 289 | y += yIncr; |
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| 290 | p += pr; |
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| 291 | } |
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| 292 | } |
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| 293 | this._mkDiv(x2, y2, _s, oy-y2+ad); |
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| 294 | } |
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| 295 | else |
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| 296 | { |
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| 297 | while(dy > 0) |
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| 298 | {--dy; |
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| 299 | y += yIncr; |
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| 300 | if(p > 0) |
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| 301 | { |
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| 302 | this._mkDiv(x++, oy, _s, y-oy+ad); |
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| 303 | p += pru; |
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| 304 | oy = y; |
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| 305 | } |
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| 306 | else p += pr; |
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| 307 | } |
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| 308 | this._mkDiv(x2, oy, _s, y2-oy+ad+1); |
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| 309 | } |
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| 310 | } |
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| 311 | } |
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| 312 | |
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| 313 | function _mkLinDott(x1, y1, x2, y2) |
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| 314 | { |
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| 315 | if(x1 > x2) |
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| 316 | { |
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| 317 | var _x2 = x2; |
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| 318 | var _y2 = y2; |
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| 319 | x2 = x1; |
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| 320 | y2 = y1; |
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| 321 | x1 = _x2; |
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| 322 | y1 = _y2; |
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| 323 | } |
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| 324 | var dx = x2-x1, dy = Math.abs(y2-y1), |
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| 325 | x = x1, y = y1, |
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| 326 | yIncr = (y1 > y2)? -1 : 1, |
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| 327 | drw = true; |
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| 328 | if(dx >= dy) |
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| 329 | { |
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| 330 | var pr = dy<<1, |
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| 331 | pru = pr - (dx<<1), |
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| 332 | p = pr-dx; |
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| 333 | while(dx > 0) |
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| 334 | {--dx; |
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| 335 | if(drw) this._mkDiv(x, y, 1, 1); |
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| 336 | drw = !drw; |
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| 337 | if(p > 0) |
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| 338 | { |
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| 339 | y += yIncr; |
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| 340 | p += pru; |
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| 341 | } |
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| 342 | else p += pr; |
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| 343 | ++x; |
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| 344 | } |
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| 345 | } |
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| 346 | else |
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| 347 | { |
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| 348 | var pr = dx<<1, |
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| 349 | pru = pr - (dy<<1), |
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| 350 | p = pr-dy; |
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| 351 | while(dy > 0) |
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| 352 | {--dy; |
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| 353 | if(drw) this._mkDiv(x, y, 1, 1); |
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| 354 | drw = !drw; |
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| 355 | y += yIncr; |
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| 356 | if(p > 0) |
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| 357 | { |
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| 358 | ++x; |
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| 359 | p += pru; |
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| 360 | } |
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| 361 | else p += pr; |
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| 362 | } |
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| 363 | } |
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| 364 | if(drw) this._mkDiv(x, y, 1, 1); |
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| 365 | } |
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| 366 | |
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| 367 | function _mkOv(left, top, width, height) |
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| 368 | { |
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| 369 | var a = (++width)>>1, b = (++height)>>1, |
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| 370 | wod = width&1, hod = height&1, |
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| 371 | cx = left+a, cy = top+b, |
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| 372 | x = 0, y = b, |
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| 373 | ox = 0, oy = b, |
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| 374 | aa2 = (a*a)<<1, aa4 = aa2<<1, bb2 = (b*b)<<1, bb4 = bb2<<1, |
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| 375 | st = (aa2>>1)*(1-(b<<1)) + bb2, |
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| 376 | tt = (bb2>>1) - aa2*((b<<1)-1), |
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| 377 | w, h; |
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| 378 | while(y > 0) |
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| 379 | { |
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| 380 | if(st < 0) |
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| 381 | { |
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| 382 | st += bb2*((x<<1)+3); |
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| 383 | tt += bb4*(++x); |
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| 384 | } |
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| 385 | else if(tt < 0) |
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| 386 | { |
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| 387 | st += bb2*((x<<1)+3) - aa4*(y-1); |
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| 388 | tt += bb4*(++x) - aa2*(((y--)<<1)-3); |
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| 389 | w = x-ox; |
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| 390 | h = oy-y; |
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| 391 | if((w&2) && (h&2)) |
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| 392 | { |
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| 393 | this._mkOvQds(cx, cy, x-2, y+2, 1, 1, wod, hod); |
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| 394 | this._mkOvQds(cx, cy, x-1, y+1, 1, 1, wod, hod); |
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| 395 | } |
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| 396 | else this._mkOvQds(cx, cy, x-1, oy, w, h, wod, hod); |
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| 397 | ox = x; |
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| 398 | oy = y; |
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| 399 | } |
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| 400 | else |
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| 401 | { |
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| 402 | tt -= aa2*((y<<1)-3); |
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| 403 | st -= aa4*(--y); |
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| 404 | } |
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| 405 | } |
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| 406 | w = a-ox+1; |
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| 407 | h = (oy<<1)+hod; |
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| 408 | y = cy-oy; |
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| 409 | this._mkDiv(cx-a, y, w, h); |
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| 410 | this._mkDiv(cx+ox+wod-1, y, w, h); |
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| 411 | } |
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| 412 | |
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| 413 | function _mkOv2D(left, top, width, height) |
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| 414 | { |
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| 415 | var s = this.stroke; |
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| 416 | width += s+1; |
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| 417 | height += s+1; |
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| 418 | var a = width>>1, b = height>>1, |
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| 419 | wod = width&1, hod = height&1, |
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| 420 | cx = left+a, cy = top+b, |
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| 421 | x = 0, y = b, |
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| 422 | aa2 = (a*a)<<1, aa4 = aa2<<1, bb2 = (b*b)<<1, bb4 = bb2<<1, |
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| 423 | st = (aa2>>1)*(1-(b<<1)) + bb2, |
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| 424 | tt = (bb2>>1) - aa2*((b<<1)-1); |
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| 425 | |
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| 426 | if(s-4 < 0 && (!(s-2) || width-51 > 0 && height-51 > 0)) |
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| 427 | { |
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| 428 | var ox = 0, oy = b, |
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| 429 | w, h, |
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| 430 | pxw; |
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| 431 | while(y > 0) |
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| 432 | { |
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| 433 | if(st < 0) |
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| 434 | { |
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| 435 | st += bb2*((x<<1)+3); |
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| 436 | tt += bb4*(++x); |
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| 437 | } |
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| 438 | else if(tt < 0) |
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| 439 | { |
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| 440 | st += bb2*((x<<1)+3) - aa4*(y-1); |
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| 441 | tt += bb4*(++x) - aa2*(((y--)<<1)-3); |
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| 442 | w = x-ox; |
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| 443 | h = oy-y; |
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| 444 | |
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| 445 | if(w-1) |
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| 446 | { |
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| 447 | pxw = w+1+(s&1); |
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| 448 | h = s; |
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| 449 | } |
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| 450 | else if(h-1) |
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| 451 | { |
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| 452 | pxw = s; |
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| 453 | h += 1+(s&1); |
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| 454 | } |
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| 455 | else pxw = h = s; |
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| 456 | this._mkOvQds(cx, cy, x-1, oy, pxw, h, wod, hod); |
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| 457 | ox = x; |
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| 458 | oy = y; |
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| 459 | } |
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| 460 | else |
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| 461 | { |
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| 462 | tt -= aa2*((y<<1)-3); |
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| 463 | st -= aa4*(--y); |
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| 464 | } |
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| 465 | } |
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| 466 | this._mkDiv(cx-a, cy-oy, s, (oy<<1)+hod); |
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| 467 | this._mkDiv(cx+a+wod-s, cy-oy, s, (oy<<1)+hod); |
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| 468 | } |
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| 469 | |
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| 470 | else |
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| 471 | { |
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| 472 | var _a = (width-(s<<1))>>1, |
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| 473 | _b = (height-(s<<1))>>1, |
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| 474 | _x = 0, _y = _b, |
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| 475 | _aa2 = (_a*_a)<<1, _aa4 = _aa2<<1, _bb2 = (_b*_b)<<1, _bb4 = _bb2<<1, |
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| 476 | _st = (_aa2>>1)*(1-(_b<<1)) + _bb2, |
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| 477 | _tt = (_bb2>>1) - _aa2*((_b<<1)-1), |
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| 478 | |
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| 479 | pxl = new Array(), |
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| 480 | pxt = new Array(), |
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| 481 | _pxb = new Array(); |
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| 482 | pxl[0] = 0; |
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| 483 | pxt[0] = b; |
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| 484 | _pxb[0] = _b-1; |
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| 485 | while(y > 0) |
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| 486 | { |
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| 487 | if(st < 0) |
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| 488 | { |
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| 489 | pxl[pxl.length] = x; |
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| 490 | pxt[pxt.length] = y; |
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| 491 | st += bb2*((x<<1)+3); |
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| 492 | tt += bb4*(++x); |
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| 493 | } |
---|
| 494 | else if(tt < 0) |
---|
| 495 | { |
---|
| 496 | pxl[pxl.length] = x; |
---|
| 497 | st += bb2*((x<<1)+3) - aa4*(y-1); |
---|
| 498 | tt += bb4*(++x) - aa2*(((y--)<<1)-3); |
---|
| 499 | pxt[pxt.length] = y; |
---|
| 500 | } |
---|
| 501 | else |
---|
| 502 | { |
---|
| 503 | tt -= aa2*((y<<1)-3); |
---|
| 504 | st -= aa4*(--y); |
---|
| 505 | } |
---|
| 506 | |
---|
| 507 | if(_y > 0) |
---|
| 508 | { |
---|
| 509 | if(_st < 0) |
---|
| 510 | { |
---|
| 511 | _st += _bb2*((_x<<1)+3); |
---|
| 512 | _tt += _bb4*(++_x); |
---|
| 513 | _pxb[_pxb.length] = _y-1; |
---|
| 514 | } |
---|
| 515 | else if(_tt < 0) |
---|
| 516 | { |
---|
| 517 | _st += _bb2*((_x<<1)+3) - _aa4*(_y-1); |
---|
| 518 | _tt += _bb4*(++_x) - _aa2*(((_y--)<<1)-3); |
---|
| 519 | _pxb[_pxb.length] = _y-1; |
---|
| 520 | } |
---|
| 521 | else |
---|
| 522 | { |
---|
| 523 | _tt -= _aa2*((_y<<1)-3); |
---|
| 524 | _st -= _aa4*(--_y); |
---|
| 525 | _pxb[_pxb.length-1]--; |
---|
| 526 | } |
---|
| 527 | } |
---|
| 528 | } |
---|
| 529 | |
---|
| 530 | var ox = -wod, oy = b, |
---|
| 531 | _oy = _pxb[0], |
---|
| 532 | l = pxl.length, |
---|
| 533 | w, h; |
---|
| 534 | for(var i = 0; i < l; i++) |
---|
| 535 | { |
---|
| 536 | if(typeof _pxb[i] != "undefined") |
---|
| 537 | { |
---|
| 538 | if(_pxb[i] < _oy || pxt[i] < oy) |
---|
| 539 | { |
---|
| 540 | x = pxl[i]; |
---|
| 541 | this._mkOvQds(cx, cy, x, oy, x-ox, oy-_oy, wod, hod); |
---|
| 542 | ox = x; |
---|
| 543 | oy = pxt[i]; |
---|
| 544 | _oy = _pxb[i]; |
---|
| 545 | } |
---|
| 546 | } |
---|
| 547 | else |
---|
| 548 | { |
---|
| 549 | x = pxl[i]; |
---|
| 550 | this._mkDiv(cx-x, cy-oy, 1, (oy<<1)+hod); |
---|
| 551 | this._mkDiv(cx+ox+wod, cy-oy, 1, (oy<<1)+hod); |
---|
| 552 | ox = x; |
---|
| 553 | oy = pxt[i]; |
---|
| 554 | } |
---|
| 555 | } |
---|
| 556 | this._mkDiv(cx-a, cy-oy, 1, (oy<<1)+hod); |
---|
| 557 | this._mkDiv(cx+ox+wod, cy-oy, 1, (oy<<1)+hod); |
---|
| 558 | } |
---|
| 559 | } |
---|
| 560 | |
---|
| 561 | function _mkOvDott(left, top, width, height) |
---|
| 562 | { |
---|
| 563 | var a = (++width)>>1, b = (++height)>>1, |
---|
| 564 | wod = width&1, hod = height&1, hodu = hod^1, |
---|
| 565 | cx = left+a, cy = top+b, |
---|
| 566 | x = 0, y = b, |
---|
| 567 | aa2 = (a*a)<<1, aa4 = aa2<<1, bb2 = (b*b)<<1, bb4 = bb2<<1, |
---|
| 568 | st = (aa2>>1)*(1-(b<<1)) + bb2, |
---|
| 569 | tt = (bb2>>1) - aa2*((b<<1)-1), |
---|
| 570 | drw = true; |
---|
| 571 | while(y > 0) |
---|
| 572 | { |
---|
| 573 | if(st < 0) |
---|
| 574 | { |
---|
| 575 | st += bb2*((x<<1)+3); |
---|
| 576 | tt += bb4*(++x); |
---|
| 577 | } |
---|
| 578 | else if(tt < 0) |
---|
| 579 | { |
---|
| 580 | st += bb2*((x<<1)+3) - aa4*(y-1); |
---|
| 581 | tt += bb4*(++x) - aa2*(((y--)<<1)-3); |
---|
| 582 | } |
---|
| 583 | else |
---|
| 584 | { |
---|
| 585 | tt -= aa2*((y<<1)-3); |
---|
| 586 | st -= aa4*(--y); |
---|
| 587 | } |
---|
| 588 | if(drw && y >= hodu) this._mkOvQds(cx, cy, x, y, 1, 1, wod, hod); |
---|
| 589 | drw = !drw; |
---|
| 590 | } |
---|
| 591 | } |
---|
| 592 | |
---|
| 593 | function _mkRect(x, y, w, h) |
---|
| 594 | { |
---|
| 595 | var s = this.stroke; |
---|
| 596 | this._mkDiv(x, y, w, s); |
---|
| 597 | this._mkDiv(x+w, y, s, h); |
---|
| 598 | this._mkDiv(x, y+h, w+s, s); |
---|
| 599 | this._mkDiv(x, y+s, s, h-s); |
---|
| 600 | } |
---|
| 601 | |
---|
| 602 | function _mkRectDott(x, y, w, h) |
---|
| 603 | { |
---|
| 604 | this.drawLine(x, y, x+w, y); |
---|
| 605 | this.drawLine(x+w, y, x+w, y+h); |
---|
| 606 | this.drawLine(x, y+h, x+w, y+h); |
---|
| 607 | this.drawLine(x, y, x, y+h); |
---|
| 608 | } |
---|
| 609 | |
---|
| 610 | function jsgFont() |
---|
| 611 | { |
---|
| 612 | this.PLAIN = 'font-weight:normal;'; |
---|
| 613 | this.BOLD = 'font-weight:bold;'; |
---|
| 614 | this.ITALIC = 'font-style:italic;'; |
---|
| 615 | this.ITALIC_BOLD = this.ITALIC + this.BOLD; |
---|
| 616 | this.BOLD_ITALIC = this.ITALIC_BOLD; |
---|
| 617 | } |
---|
| 618 | var Font = new jsgFont(); |
---|
| 619 | |
---|
| 620 | function jsgStroke() |
---|
| 621 | { |
---|
| 622 | this.DOTTED = -1; |
---|
| 623 | } |
---|
| 624 | var Stroke = new jsgStroke(); |
---|
| 625 | |
---|
| 626 | function jsGraphics(cnv, wnd) |
---|
| 627 | { |
---|
| 628 | this.setColor = function(x) |
---|
| 629 | { |
---|
| 630 | this.color = x.toLowerCase(); |
---|
| 631 | }; |
---|
| 632 | |
---|
| 633 | this.setStroke = function(x) |
---|
| 634 | { |
---|
| 635 | this.stroke = x; |
---|
| 636 | if(!(x+1)) |
---|
| 637 | { |
---|
| 638 | this.drawLine = _mkLinDott; |
---|
| 639 | this._mkOv = _mkOvDott; |
---|
| 640 | this.drawRect = _mkRectDott; |
---|
| 641 | } |
---|
| 642 | else if(x-1 > 0) |
---|
| 643 | { |
---|
| 644 | this.drawLine = _mkLin2D; |
---|
| 645 | this._mkOv = _mkOv2D; |
---|
| 646 | this.drawRect = _mkRect; |
---|
| 647 | } |
---|
| 648 | else |
---|
| 649 | { |
---|
| 650 | this.drawLine = _mkLin; |
---|
| 651 | this._mkOv = _mkOv; |
---|
| 652 | this.drawRect = _mkRect; |
---|
| 653 | } |
---|
| 654 | }; |
---|
| 655 | |
---|
| 656 | this.setPrintable = function(arg) |
---|
| 657 | { |
---|
| 658 | this.printable = arg; |
---|
| 659 | if(jg_fast) |
---|
| 660 | { |
---|
| 661 | this._mkDiv = _mkDivIe; |
---|
| 662 | this._htmRpc = arg? _htmPrtRpc : _htmRpc; |
---|
| 663 | } |
---|
| 664 | else this._mkDiv = arg? _mkDivPrt : _mkDiv; |
---|
| 665 | }; |
---|
| 666 | |
---|
| 667 | this.setFont = function(fam, sz, sty) |
---|
| 668 | { |
---|
| 669 | this.ftFam = fam; |
---|
| 670 | this.ftSz = sz; |
---|
| 671 | this.ftSty = sty || Font.PLAIN; |
---|
| 672 | }; |
---|
| 673 | |
---|
| 674 | this.drawPolyline = this.drawPolyLine = function(x, y) |
---|
| 675 | { |
---|
| 676 | for (var i=x.length - 1; i;) |
---|
| 677 | {--i; |
---|
| 678 | this.drawLine(x[i], y[i], x[i+1], y[i+1]); |
---|
| 679 | } |
---|
| 680 | }; |
---|
| 681 | |
---|
| 682 | this.fillRect = function(x, y, w, h) |
---|
| 683 | { |
---|
| 684 | this._mkDiv(x, y, w, h); |
---|
| 685 | }; |
---|
| 686 | |
---|
| 687 | this.drawPolygon = function(x, y) |
---|
| 688 | { |
---|
| 689 | this.drawPolyline(x, y); |
---|
| 690 | this.drawLine(x[x.length-1], y[x.length-1], x[0], y[0]); |
---|
| 691 | }; |
---|
| 692 | |
---|
| 693 | this.drawEllipse = this.drawOval = function(x, y, w, h) |
---|
| 694 | { |
---|
| 695 | this._mkOv(x, y, w, h); |
---|
| 696 | }; |
---|
| 697 | |
---|
| 698 | this.fillEllipse = this.fillOval = function(left, top, w, h) |
---|
| 699 | { |
---|
| 700 | var a = w>>1, b = h>>1, |
---|
| 701 | wod = w&1, hod = h&1, |
---|
| 702 | cx = left+a, cy = top+b, |
---|
| 703 | x = 0, y = b, oy = b, |
---|
| 704 | aa2 = (a*a)<<1, aa4 = aa2<<1, bb2 = (b*b)<<1, bb4 = bb2<<1, |
---|
| 705 | st = (aa2>>1)*(1-(b<<1)) + bb2, |
---|
| 706 | tt = (bb2>>1) - aa2*((b<<1)-1), |
---|
| 707 | xl, dw, dh; |
---|
| 708 | if(w) while(y > 0) |
---|
| 709 | { |
---|
| 710 | if(st < 0) |
---|
| 711 | { |
---|
| 712 | st += bb2*((x<<1)+3); |
---|
| 713 | tt += bb4*(++x); |
---|
| 714 | } |
---|
| 715 | else if(tt < 0) |
---|
| 716 | { |
---|
| 717 | st += bb2*((x<<1)+3) - aa4*(y-1); |
---|
| 718 | xl = cx-x; |
---|
| 719 | dw = (x<<1)+wod; |
---|
| 720 | tt += bb4*(++x) - aa2*(((y--)<<1)-3); |
---|
| 721 | dh = oy-y; |
---|
| 722 | this._mkDiv(xl, cy-oy, dw, dh); |
---|
| 723 | this._mkDiv(xl, cy+y+hod, dw, dh); |
---|
| 724 | oy = y; |
---|
| 725 | } |
---|
| 726 | else |
---|
| 727 | { |
---|
| 728 | tt -= aa2*((y<<1)-3); |
---|
| 729 | st -= aa4*(--y); |
---|
| 730 | } |
---|
| 731 | } |
---|
| 732 | this._mkDiv(cx-a, cy-oy, w, (oy<<1)+hod); |
---|
| 733 | }; |
---|
| 734 | |
---|
| 735 | this.fillArc = function(iL, iT, iW, iH, fAngA, fAngZ) |
---|
| 736 | { |
---|
| 737 | var a = iW>>1, b = iH>>1, |
---|
| 738 | iOdds = (iW&1) | ((iH&1) << 16), |
---|
| 739 | cx = iL+a, cy = iT+b, |
---|
| 740 | x = 0, y = b, ox = x, oy = y, |
---|
| 741 | aa2 = (a*a)<<1, aa4 = aa2<<1, bb2 = (b*b)<<1, bb4 = bb2<<1, |
---|
| 742 | st = (aa2>>1)*(1-(b<<1)) + bb2, |
---|
| 743 | tt = (bb2>>1) - aa2*((b<<1)-1), |
---|
| 744 | // Vars for radial boundary lines |
---|
| 745 | xEndA, yEndA, xEndZ, yEndZ, |
---|
| 746 | iSects = (1 << (Math.floor((fAngA %= 360.0)/180.0) << 3)) |
---|
| 747 | | (2 << (Math.floor((fAngZ %= 360.0)/180.0) << 3)) |
---|
| 748 | | ((fAngA >= fAngZ) << 16), |
---|
| 749 | aBndA = new Array(b+1), aBndZ = new Array(b+1); |
---|
| 750 | |
---|
| 751 | // Set up radial boundary lines |
---|
| 752 | fAngA *= Math.PI/180.0; |
---|
| 753 | fAngZ *= Math.PI/180.0; |
---|
| 754 | xEndA = cx+Math.round(a*Math.cos(fAngA)); |
---|
| 755 | yEndA = cy+Math.round(-b*Math.sin(fAngA)); |
---|
| 756 | _mkLinVirt(aBndA, cx, cy, xEndA, yEndA); |
---|
| 757 | xEndZ = cx+Math.round(a*Math.cos(fAngZ)); |
---|
| 758 | yEndZ = cy+Math.round(-b*Math.sin(fAngZ)); |
---|
| 759 | _mkLinVirt(aBndZ, cx, cy, xEndZ, yEndZ); |
---|
| 760 | |
---|
| 761 | while(y > 0) |
---|
| 762 | { |
---|
| 763 | if(st < 0) // Advance x |
---|
| 764 | { |
---|
| 765 | st += bb2*((x<<1)+3); |
---|
| 766 | tt += bb4*(++x); |
---|
| 767 | } |
---|
| 768 | else if(tt < 0) // Advance x and y |
---|
| 769 | { |
---|
| 770 | st += bb2*((x<<1)+3) - aa4*(y-1); |
---|
| 771 | ox = x; |
---|
| 772 | tt += bb4*(++x) - aa2*(((y--)<<1)-3); |
---|
| 773 | this._mkArcDiv(ox, y, oy, cx, cy, iOdds, aBndA, aBndZ, iSects); |
---|
| 774 | oy = y; |
---|
| 775 | } |
---|
| 776 | else // Advance y |
---|
| 777 | { |
---|
| 778 | tt -= aa2*((y<<1)-3); |
---|
| 779 | st -= aa4*(--y); |
---|
| 780 | if(y && (aBndA[y] != aBndA[y-1] || aBndZ[y] != aBndZ[y-1])) |
---|
| 781 | { |
---|
| 782 | this._mkArcDiv(x, y, oy, cx, cy, iOdds, aBndA, aBndZ, iSects); |
---|
| 783 | ox = x; |
---|
| 784 | oy = y; |
---|
| 785 | } |
---|
| 786 | } |
---|
| 787 | } |
---|
| 788 | this._mkArcDiv(x, 0, oy, cx, cy, iOdds, aBndA, aBndZ, iSects); |
---|
| 789 | if(iOdds >> 16) // Odd height |
---|
| 790 | { |
---|
| 791 | if(iSects >> 16) // Start-angle > end-angle |
---|
| 792 | { |
---|
| 793 | var xl = (yEndA <= cy || yEndZ > cy)? (cx - x) : cx; |
---|
| 794 | this._mkDiv(xl, cy, x + cx - xl + (iOdds & 0xffff), 1); |
---|
| 795 | } |
---|
| 796 | else if((iSects & 0x01) && yEndZ > cy) |
---|
| 797 | this._mkDiv(cx - x, cy, x, 1); |
---|
| 798 | } |
---|
| 799 | }; |
---|
| 800 | |
---|
| 801 | /* fillPolygon method, implemented by Matthieu Haller. |
---|
| 802 | This javascript function is an adaptation of the gdImageFilledPolygon for Walter Zorn lib. |
---|
| 803 | C source of GD 1.8.4 found at http://www.boutell.com/gd/ |
---|
| 804 | |
---|
| 805 | THANKS to Kirsten Schulz for the polygon fixes! |
---|
| 806 | |
---|
| 807 | The intersection finding technique of this code could be improved |
---|
| 808 | by remembering the previous intertersection, and by using the slope. |
---|
| 809 | That could help to adjust intersections to produce a nice |
---|
| 810 | interior_extrema. */ |
---|
| 811 | this.fillPolygon = function(array_x, array_y) |
---|
| 812 | { |
---|
| 813 | var i; |
---|
| 814 | var y; |
---|
| 815 | var miny, maxy; |
---|
| 816 | var x1, y1; |
---|
| 817 | var x2, y2; |
---|
| 818 | var ind1, ind2; |
---|
| 819 | var ints; |
---|
| 820 | |
---|
| 821 | var n = array_x.length; |
---|
| 822 | if(!n) return; |
---|
| 823 | |
---|
| 824 | miny = array_y[0]; |
---|
| 825 | maxy = array_y[0]; |
---|
| 826 | for(i = 1; i < n; i++) |
---|
| 827 | { |
---|
| 828 | if(array_y[i] < miny) |
---|
| 829 | miny = array_y[i]; |
---|
| 830 | |
---|
| 831 | if(array_y[i] > maxy) |
---|
| 832 | maxy = array_y[i]; |
---|
| 833 | } |
---|
| 834 | for(y = miny; y <= maxy; y++) |
---|
| 835 | { |
---|
| 836 | var polyInts = new Array(); |
---|
| 837 | ints = 0; |
---|
| 838 | for(i = 0; i < n; i++) |
---|
| 839 | { |
---|
| 840 | if(!i) |
---|
| 841 | { |
---|
| 842 | ind1 = n-1; |
---|
| 843 | ind2 = 0; |
---|
| 844 | } |
---|
| 845 | else |
---|
| 846 | { |
---|
| 847 | ind1 = i-1; |
---|
| 848 | ind2 = i; |
---|
| 849 | } |
---|
| 850 | y1 = array_y[ind1]; |
---|
| 851 | y2 = array_y[ind2]; |
---|
| 852 | if(y1 < y2) |
---|
| 853 | { |
---|
| 854 | x1 = array_x[ind1]; |
---|
| 855 | x2 = array_x[ind2]; |
---|
| 856 | } |
---|
| 857 | else if(y1 > y2) |
---|
| 858 | { |
---|
| 859 | y2 = array_y[ind1]; |
---|
| 860 | y1 = array_y[ind2]; |
---|
| 861 | x2 = array_x[ind1]; |
---|
| 862 | x1 = array_x[ind2]; |
---|
| 863 | } |
---|
| 864 | else continue; |
---|
| 865 | |
---|
| 866 | // Modified 11. 2. 2004 Walter Zorn |
---|
| 867 | if((y >= y1) && (y < y2)) |
---|
| 868 | polyInts[ints++] = Math.round((y-y1) * (x2-x1) / (y2-y1) + x1); |
---|
| 869 | |
---|
| 870 | else if((y == maxy) && (y > y1) && (y <= y2)) |
---|
| 871 | polyInts[ints++] = Math.round((y-y1) * (x2-x1) / (y2-y1) + x1); |
---|
| 872 | } |
---|
| 873 | polyInts.sort(_CompInt); |
---|
| 874 | for(i = 0; i < ints; i+=2) |
---|
| 875 | this._mkDiv(polyInts[i], y, polyInts[i+1]-polyInts[i]+1, 1); |
---|
| 876 | } |
---|
| 877 | }; |
---|
| 878 | |
---|
| 879 | this.drawString = function(txt, x, y) |
---|
| 880 | { |
---|
| 881 | this.htm += '<div style="position:absolute;white-space:nowrap;'+ |
---|
| 882 | 'left:' + x + 'px;'+ |
---|
| 883 | 'top:' + y + 'px;'+ |
---|
| 884 | 'font-family:' + this.ftFam + ';'+ |
---|
| 885 | 'font-size:' + this.ftSz + ';'+ |
---|
| 886 | 'color:' + this.color + ';' + this.ftSty + '">'+ |
---|
| 887 | txt + |
---|
| 888 | '<\/div>'; |
---|
| 889 | }; |
---|
| 890 | |
---|
| 891 | /* drawStringRect() added by Rick Blommers. |
---|
| 892 | Allows to specify the size of the text rectangle and to align the |
---|
| 893 | text both horizontally (e.g. right) and vertically within that rectangle */ |
---|
| 894 | this.drawStringRect = function(txt, x, y, width, halign) |
---|
| 895 | { |
---|
| 896 | this.htm += '<div style="position:absolute;overflow:hidden;'+ |
---|
| 897 | 'left:' + x + 'px;'+ |
---|
| 898 | 'top:' + y + 'px;'+ |
---|
| 899 | 'width:'+width +'px;'+ |
---|
| 900 | 'text-align:'+halign+';'+ |
---|
| 901 | 'font-family:' + this.ftFam + ';'+ |
---|
| 902 | 'font-size:' + this.ftSz + ';'+ |
---|
| 903 | 'color:' + this.color + ';' + this.ftSty + '">'+ |
---|
| 904 | txt + |
---|
| 905 | '<\/div>'; |
---|
| 906 | }; |
---|
| 907 | |
---|
| 908 | this.drawImage = function(imgSrc, x, y, w, h, a) |
---|
| 909 | { |
---|
| 910 | this.htm += '<div style="position:absolute;'+ |
---|
| 911 | 'left:' + x + 'px;'+ |
---|
| 912 | 'top:' + y + 'px;'+ |
---|
| 913 | 'width:' + w + 'px;'+ |
---|
| 914 | 'height:' + h + 'px;">'+ |
---|
| 915 | '<img src="' + imgSrc + '" width="' + w + '" height="' + h + '"' + (a? (' '+a) : '') + '>'+ |
---|
| 916 | '<\/div>'; |
---|
| 917 | }; |
---|
| 918 | |
---|
| 919 | this.clear = function() |
---|
| 920 | { |
---|
| 921 | this.htm = ""; |
---|
| 922 | if(this.cnv) this.cnv.innerHTML = ""; |
---|
| 923 | }; |
---|
| 924 | |
---|
| 925 | this._mkOvQds = function(cx, cy, x, y, w, h, wod, hod) |
---|
| 926 | { |
---|
| 927 | var xl = cx - x, xr = cx + x + wod - w, yt = cy - y, yb = cy + y + hod - h; |
---|
| 928 | if(xr > xl+w) |
---|
| 929 | { |
---|
| 930 | this._mkDiv(xr, yt, w, h); |
---|
| 931 | this._mkDiv(xr, yb, w, h); |
---|
| 932 | } |
---|
| 933 | else |
---|
| 934 | w = xr - xl + w; |
---|
| 935 | this._mkDiv(xl, yt, w, h); |
---|
| 936 | this._mkDiv(xl, yb, w, h); |
---|
| 937 | }; |
---|
| 938 | |
---|
| 939 | this._mkArcDiv = function(x, y, oy, cx, cy, iOdds, aBndA, aBndZ, iSects) |
---|
| 940 | { |
---|
| 941 | var xrDef = cx + x + (iOdds & 0xffff), y2, h = oy - y, xl, xr, w; |
---|
| 942 | |
---|
| 943 | if(!h) h = 1; |
---|
| 944 | x = cx - x; |
---|
| 945 | |
---|
| 946 | if(iSects & 0xff0000) // Start-angle > end-angle |
---|
| 947 | { |
---|
| 948 | y2 = cy - y - h; |
---|
| 949 | if(iSects & 0x00ff) |
---|
| 950 | { |
---|
| 951 | if(iSects & 0x02) |
---|
| 952 | { |
---|
| 953 | xl = Math.max(x, aBndZ[y]); |
---|
| 954 | w = xrDef - xl; |
---|
| 955 | if(w > 0) this._mkDiv(xl, y2, w, h); |
---|
| 956 | } |
---|
| 957 | if(iSects & 0x01) |
---|
| 958 | { |
---|
| 959 | xr = Math.min(xrDef, aBndA[y]); |
---|
| 960 | w = xr - x; |
---|
| 961 | if(w > 0) this._mkDiv(x, y2, w, h); |
---|
| 962 | } |
---|
| 963 | } |
---|
| 964 | else |
---|
| 965 | this._mkDiv(x, y2, xrDef - x, h); |
---|
| 966 | y2 = cy + y + (iOdds >> 16); |
---|
| 967 | if(iSects & 0xff00) |
---|
| 968 | { |
---|
| 969 | if(iSects & 0x0100) |
---|
| 970 | { |
---|
| 971 | xl = Math.max(x, aBndA[y]); |
---|
| 972 | w = xrDef - xl; |
---|
| 973 | if(w > 0) this._mkDiv(xl, y2, w, h); |
---|
| 974 | } |
---|
| 975 | if(iSects & 0x0200) |
---|
| 976 | { |
---|
| 977 | xr = Math.min(xrDef, aBndZ[y]); |
---|
| 978 | w = xr - x; |
---|
| 979 | if(w > 0) this._mkDiv(x, y2, w, h); |
---|
| 980 | } |
---|
| 981 | } |
---|
| 982 | else |
---|
| 983 | this._mkDiv(x, y2, xrDef - x, h); |
---|
| 984 | } |
---|
| 985 | else |
---|
| 986 | { |
---|
| 987 | if(iSects & 0x00ff) |
---|
| 988 | { |
---|
| 989 | if(iSects & 0x02) |
---|
| 990 | xl = Math.max(x, aBndZ[y]); |
---|
| 991 | else |
---|
| 992 | xl = x; |
---|
| 993 | if(iSects & 0x01) |
---|
| 994 | xr = Math.min(xrDef, aBndA[y]); |
---|
| 995 | else |
---|
| 996 | xr = xrDef; |
---|
| 997 | y2 = cy - y - h; |
---|
| 998 | w = xr - xl; |
---|
| 999 | if(w > 0) this._mkDiv(xl, y2, w, h); |
---|
| 1000 | } |
---|
| 1001 | if(iSects & 0xff00) |
---|
| 1002 | { |
---|
| 1003 | if(iSects & 0x0100) |
---|
| 1004 | xl = Math.max(x, aBndA[y]); |
---|
| 1005 | else |
---|
| 1006 | xl = x; |
---|
| 1007 | if(iSects & 0x0200) |
---|
| 1008 | xr = Math.min(xrDef, aBndZ[y]); |
---|
| 1009 | else |
---|
| 1010 | xr = xrDef; |
---|
| 1011 | y2 = cy + y + (iOdds >> 16); |
---|
| 1012 | w = xr - xl; |
---|
| 1013 | if(w > 0) this._mkDiv(xl, y2, w, h); |
---|
| 1014 | } |
---|
| 1015 | } |
---|
| 1016 | }; |
---|
| 1017 | |
---|
| 1018 | this.setStroke(1); |
---|
| 1019 | this.setFont("verdana,geneva,helvetica,sans-serif", "12px", Font.PLAIN); |
---|
| 1020 | this.color = "#000000"; |
---|
| 1021 | this.htm = ""; |
---|
| 1022 | this.wnd = wnd || window; |
---|
| 1023 | |
---|
| 1024 | if(!jg_ok) _chkDHTM(); |
---|
| 1025 | if(jg_ok) |
---|
| 1026 | { |
---|
| 1027 | if(cnv) |
---|
| 1028 | { |
---|
| 1029 | if(typeof(cnv) == "string") |
---|
| 1030 | this.cont = document.all? (this.wnd.document.all[cnv] || null) |
---|
| 1031 | : document.getElementById? (this.wnd.document.getElementById(cnv) || null) |
---|
| 1032 | : null; |
---|
| 1033 | else if(cnv == window.document) |
---|
| 1034 | this.cont = document.getElementsByTagName("body")[0]; |
---|
| 1035 | // If cnv is a direct reference to a canvas DOM node |
---|
| 1036 | // (option suggested by Andreas Luleich) |
---|
| 1037 | else this.cont = cnv; |
---|
| 1038 | // Create new canvas inside container DIV. Thus the drawing and clearing |
---|
| 1039 | // methods won't interfere with the container's inner html. |
---|
| 1040 | // Solution suggested by Vladimir. |
---|
| 1041 | this.cnv = this.wnd.document.createElement("div"); |
---|
| 1042 | this.cnv.style.fontSize=0; |
---|
| 1043 | this.cont.appendChild(this.cnv); |
---|
| 1044 | this.paint = jg_dom? _pntCnvDom : _pntCnvIe; |
---|
| 1045 | } |
---|
| 1046 | else |
---|
| 1047 | this.paint = _pntDoc; |
---|
| 1048 | } |
---|
| 1049 | else |
---|
| 1050 | this.paint = _pntN; |
---|
| 1051 | |
---|
| 1052 | this.setPrintable(false); |
---|
| 1053 | } |
---|
| 1054 | |
---|
| 1055 | function _mkLinVirt(aLin, x1, y1, x2, y2) |
---|
| 1056 | { |
---|
| 1057 | var dx = Math.abs(x2-x1), dy = Math.abs(y2-y1), |
---|
| 1058 | x = x1, y = y1, |
---|
| 1059 | xIncr = (x1 > x2)? -1 : 1, |
---|
| 1060 | yIncr = (y1 > y2)? -1 : 1, |
---|
| 1061 | p, |
---|
| 1062 | i = 0; |
---|
| 1063 | if(dx >= dy) |
---|
| 1064 | { |
---|
| 1065 | var pr = dy<<1, |
---|
| 1066 | pru = pr - (dx<<1); |
---|
| 1067 | p = pr-dx; |
---|
| 1068 | while(dx > 0) |
---|
| 1069 | {--dx; |
---|
| 1070 | if(p > 0) // Increment y |
---|
| 1071 | { |
---|
| 1072 | aLin[i++] = x; |
---|
| 1073 | y += yIncr; |
---|
| 1074 | p += pru; |
---|
| 1075 | } |
---|
| 1076 | else p += pr; |
---|
| 1077 | x += xIncr; |
---|
| 1078 | } |
---|
| 1079 | } |
---|
| 1080 | else |
---|
| 1081 | { |
---|
| 1082 | var pr = dx<<1, |
---|
| 1083 | pru = pr - (dy<<1); |
---|
| 1084 | p = pr-dy; |
---|
| 1085 | while(dy > 0) |
---|
| 1086 | {--dy; |
---|
| 1087 | y += yIncr; |
---|
| 1088 | aLin[i++] = x; |
---|
| 1089 | if(p > 0) // Increment x |
---|
| 1090 | { |
---|
| 1091 | x += xIncr; |
---|
| 1092 | p += pru; |
---|
| 1093 | } |
---|
| 1094 | else p += pr; |
---|
| 1095 | } |
---|
| 1096 | } |
---|
| 1097 | for(var len = aLin.length, i = len-i; i;) |
---|
| 1098 | aLin[len-(i--)] = x; |
---|
| 1099 | }; |
---|
| 1100 | |
---|
| 1101 | function _CompInt(x, y) |
---|
| 1102 | { |
---|
| 1103 | return(x - y); |
---|
| 1104 | } |
---|
| 1105 | |
---|