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| 1 /* Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 * Use of this source code is governed by a BSD-style license that can be | |
| 3 * found in the LICENSE file. | |
| 4 */ | |
| 5 'use strict'; | |
| 6 | |
| 7 base.require('base.range'); | |
| 8 base.require('ui.event_target'); | |
| 9 | |
| 10 base.exportTo('ccfv', function() { | |
| 11 function QuadViewViewport(bbox, | |
| 12 opt_scale, | |
| 13 opt_dontPadBbox, opt_devicePixelRatio) { | |
| 14 ui.EventTarget.call(this); | |
| 15 if (bbox.isEmpty) | |
| 16 throw new Error('Cannot initialize a viewport with an empty bbox'); | |
| 17 | |
| 18 this.setWorldBBox(bbox, opt_dontPadBbox); | |
| 19 | |
| 20 var devicePixelRatio; | |
| 21 if (opt_devicePixelRatio) | |
| 22 devicePixelRatio = opt_devicePixelRatio; | |
| 23 else | |
| 24 devicePixelRatio = window.devicePixelRatio || 1; | |
| 25 | |
| 26 var scale; | |
| 27 if (opt_scale) { | |
| 28 scale = opt_scale; | |
| 29 } else { | |
| 30 if (devicePixelRatio > 1) | |
| 31 scale = 0.25; | |
| 32 else | |
| 33 scale = 0.125; | |
| 34 } | |
| 35 this.scale_ = scale; | |
| 36 this.updateScale_(); | |
| 37 } | |
| 38 | |
| 39 QuadViewViewport.prototype = { | |
| 40 | |
| 41 __proto__: ui.EventTarget.prototype, | |
| 42 | |
| 43 set scale(scale) { | |
| 44 this.scale_ = scale; | |
| 45 this.updateScale_(); | |
| 46 this.didChange_(); | |
| 47 }, | |
| 48 | |
| 49 get scale() { | |
| 50 return this.scale_; | |
| 51 }, | |
| 52 | |
| 53 updateScale_: function() { | |
| 54 this.worldPixelsPerDevicePixel_ = this.scale_; | |
| 55 this.devicePixelsPerLayoutPixel_ = 1 / devicePixelRatio; | |
| 56 | |
| 57 this.deviceWidth = | |
| 58 this.worldRect.width * this.worldPixelsPerDevicePixel_; | |
| 59 this.deviceHeight = | |
| 60 this.worldRect.height * this.worldPixelsPerDevicePixel_; | |
| 61 | |
| 62 this.layoutWidth = this.deviceWidth * this.devicePixelsPerLayoutPixel_; | |
| 63 this.layoutHeight = this.deviceHeight * this.devicePixelsPerLayoutPixel_; | |
| 64 | |
| 65 this.transformWorldToDevicePixels_ = mat2d.create(); | |
| 66 this.transformDevicePixelsToWorld_ = mat2d.create(); | |
| 67 this.updateTransform_(); | |
| 68 }, | |
| 69 | |
| 70 setWorldBBox: function(bbox, opt_dontPadBbox) { | |
| 71 var world_rect = bbox.asRect(); | |
| 72 var world_pad; | |
| 73 if (opt_dontPadBbox) { | |
| 74 world_pad = 0; | |
| 75 } else { | |
| 76 world_pad = Math.min(world_rect.width, | |
| 77 world_rect.height) * 0.10; | |
| 78 } | |
| 79 | |
| 80 world_rect.enlarge(world_pad); | |
| 81 this.worldRect = world_rect; | |
| 82 this.updateScale_(); | |
| 83 this.updateTransform_(); | |
| 84 this.didChange_(); | |
| 85 }, | |
| 86 | |
| 87 updateTransform_: function() { | |
| 88 if (!this.transformWorldToDevicePixels_) | |
| 89 return; | |
| 90 | |
| 91 mat2d.identity(this.transformWorldToDevicePixels_); | |
| 92 mat2d.translateInplaceXY( | |
| 93 this.transformWorldToDevicePixels_, | |
| 94 -this.worldRect.left, -this.worldRect.top); | |
| 95 mat2d.scaleInplaceXY(this.transformWorldToDevicePixels_, | |
| 96 this.worldPixelsPerDevicePixel_, | |
| 97 this.worldPixelsPerDevicePixel_); | |
| 98 | |
| 99 mat2d.invert(this.transformDevicePixelsToWorld_, | |
| 100 this.transformWorldToDevicePixels_); | |
| 101 }, | |
| 102 | |
| 103 layoutPixelsToWorldPixels2: function(v) { | |
| 104 var tmp = this.layoutPixelsToDevicePixels2(v); | |
| 105 return this.devicePixelsToWorldPixels2(tmp); | |
| 106 }, | |
| 107 | |
| 108 layoutPixelsToDevicePixels2: function(v) { | |
| 109 var res = vec2.create(); | |
| 110 return vec2.scale(res, v, 1 / this.devicePixelsPerLayoutPixel_); | |
| 111 }, | |
| 112 | |
| 113 devicePixelsToWorldPixels2: function(v) { | |
| 114 var res = vec2.create(); | |
| 115 vec2.transformMat2d(res, v, this.transformDevicePixelsToWorld_); | |
| 116 return res; | |
| 117 }, | |
| 118 | |
| 119 getWorldToDevicePixelTransform: function() { | |
| 120 return this.transformDevicePixelsToWorld_; | |
| 121 }, | |
| 122 | |
| 123 getDeviceLineWidthAssumingTransformIsApplied: function( | |
| 124 desired_device_line_width) { | |
| 125 return desired_device_line_width / this.worldPixelsPerDevicePixel_; | |
| 126 }, | |
| 127 | |
| 128 applyTransformToContext: function(ctx) { | |
| 129 var transform = this.transformWorldToDevicePixels_; | |
| 130 ctx.transform(transform[0], transform[1], transform[2], | |
| 131 transform[3], transform[4], transform[5]); | |
| 132 }, | |
| 133 | |
| 134 forceRedrawAll: function() { | |
| 135 this.didChange_(); | |
| 136 }, | |
| 137 | |
| 138 didChange_: function() { | |
| 139 base.dispatchSimpleEvent(this, 'change', false, false); | |
| 140 } | |
| 141 }; | |
| 142 | |
| 143 return { | |
| 144 QuadViewViewport: QuadViewViewport, | |
| 145 } | |
| 146 }); | |
| 147 | |
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Chromium Code Reviews
Issue 15736032:
Remove old cc-frame-viewer now that it is upstreamed into trace_viewer (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src