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| 1 <!DOCTYPE html> | |
| 2 <!-- | |
| 3 Copyright (c) 2014 The Chromium Authors. All rights reserved. | |
| 4 Use of this source code is governed by a BSD-style license that can be | |
| 5 found in the LICENSE file. | |
| 6 --> | |
| 7 <link rel="import" href="/tracing/base/base.html"> | |
| 8 <link rel="import" href="/tracing/base/math.html"> | |
| 9 <script> | |
| 10 'use strict'; | |
| 11 | |
| 12 tr.exportTo('tr.b', function() { | |
| 13 /** | |
| 14 * Tracks a 2D bounding box. | |
| 15 * @constructor | |
| 16 */ | |
| 17 function Rect() { | |
| 18 this.x = 0; | |
| 19 this.y = 0; | |
| 20 this.width = 0; | |
| 21 this.height = 0; | |
| 22 } | |
| 23 | |
| 24 Rect.fromXYWH = function(x, y, w, h) { | |
| 25 var rect = new Rect(); | |
| 26 rect.x = x; | |
| 27 rect.y = y; | |
| 28 rect.width = w; | |
| 29 rect.height = h; | |
| 30 return rect; | |
| 31 }; | |
| 32 | |
| 33 Rect.fromArray = function(ary) { | |
| 34 if (ary.length !== 4) | |
| 35 throw new Error('ary.length must be 4'); | |
| 36 var rect = new Rect(); | |
| 37 rect.x = ary[0]; | |
| 38 rect.y = ary[1]; | |
| 39 rect.width = ary[2]; | |
| 40 rect.height = ary[3]; | |
| 41 return rect; | |
| 42 }; | |
| 43 | |
| 44 Rect.prototype = { | |
| 45 __proto__: Object.prototype, | |
| 46 | |
| 47 get left() { | |
| 48 return this.x; | |
| 49 }, | |
| 50 | |
| 51 get top() { | |
| 52 return this.y; | |
| 53 }, | |
| 54 | |
| 55 get right() { | |
| 56 return this.x + this.width; | |
| 57 }, | |
| 58 | |
| 59 get bottom() { | |
| 60 return this.y + this.height; | |
| 61 }, | |
| 62 | |
| 63 toString: function() { | |
| 64 return 'Rect(' + this.x + ', ' + this.y + ', ' + | |
| 65 this.width + ', ' + this.height + ')'; | |
| 66 }, | |
| 67 | |
| 68 toArray: function() { | |
| 69 return [this.x, this.y, this.width, this.height]; | |
| 70 }, | |
| 71 | |
| 72 clone: function() { | |
| 73 var rect = new Rect(); | |
| 74 rect.x = this.x; | |
| 75 rect.y = this.y; | |
| 76 rect.width = this.width; | |
| 77 rect.height = this.height; | |
| 78 return rect; | |
| 79 }, | |
| 80 | |
| 81 enlarge: function(pad) { | |
| 82 var rect = new Rect(); | |
| 83 this.enlargeFast(rect, pad); | |
| 84 return rect; | |
| 85 }, | |
| 86 | |
| 87 enlargeFast: function(out, pad) { | |
| 88 out.x = this.x - pad; | |
| 89 out.y = this.y - pad; | |
| 90 out.width = this.width + 2 * pad; | |
| 91 out.height = this.height + 2 * pad; | |
| 92 return out; | |
| 93 }, | |
| 94 | |
| 95 size: function() { | |
| 96 return {width: this.width, height: this.height}; | |
| 97 }, | |
| 98 | |
| 99 scale: function(s) { | |
| 100 var rect = new Rect(); | |
| 101 this.scaleFast(rect, s); | |
| 102 return rect; | |
| 103 }, | |
| 104 | |
| 105 scaleSize: function(s) { | |
| 106 return Rect.fromXYWH(this.x, this.y, this.width * s, this.height * s); | |
| 107 }, | |
| 108 | |
| 109 scaleFast: function(out, s) { | |
| 110 out.x = this.x * s; | |
| 111 out.y = this.y * s; | |
| 112 out.width = this.width * s; | |
| 113 out.height = this.height * s; | |
| 114 return out; | |
| 115 }, | |
| 116 | |
| 117 translate: function(v) { | |
| 118 var rect = new Rect(); | |
| 119 this.translateFast(rect, v); | |
| 120 return rect; | |
| 121 }, | |
| 122 | |
| 123 translateFast: function(out, v) { | |
| 124 out.x = this.x + v[0]; | |
| 125 out.y = this.x + v[1]; | |
| 126 out.width = this.width; | |
| 127 out.height = this.height; | |
| 128 return out; | |
| 129 }, | |
| 130 | |
| 131 asUVRectInside: function(containingRect) { | |
| 132 var rect = new Rect(); | |
| 133 rect.x = (this.x - containingRect.x) / containingRect.width; | |
| 134 rect.y = (this.y - containingRect.y) / containingRect.height; | |
| 135 rect.width = this.width / containingRect.width; | |
| 136 rect.height = this.height / containingRect.height; | |
| 137 return rect; | |
| 138 }, | |
| 139 | |
| 140 intersects: function(that) { | |
| 141 var ok = true; | |
| 142 ok &= this.x < that.right; | |
| 143 ok &= this.right > that.x; | |
| 144 ok &= this.y < that.bottom; | |
| 145 ok &= this.bottom > that.y; | |
| 146 return ok; | |
| 147 }, | |
| 148 | |
| 149 equalTo: function(rect) { | |
| 150 return rect && | |
| 151 (this.x === rect.x) && | |
| 152 (this.y === rect.y) && | |
| 153 (this.width === rect.width) && | |
| 154 (this.height === rect.height); | |
| 155 } | |
| 156 }; | |
| 157 | |
| 158 return { | |
| 159 Rect, | |
| 160 }; | |
| 161 }); | |
| 162 </script> | |
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Chromium Code Reviews
Issue 2771723003:
[tracing] Move math utilities from base into their own subdirectory (attempt 2) (Closed)
