javascript - Methods for most performant dashed rectangle -

-

i have rectangle, stroke 1px dashed line typical of selection objects see in image editors.

i researching methods, , wondering performant?

  1. should draw recntangle go through , clear gaps?
  2. should use dashedline here draw 4 dashed lines? https://stackoverflow.com/a/4577326/1828637
  3. any other methods?

thanks

using context.setlinedash(segments); valid method supported major browsers.

read more here: https://developer.mozilla.org/en-us/docs/web/api/canvasrenderingcontext2d/setlinedash


Comments

Post a Comment

Popular posts from this blog

Android : Making Listview full screen -

-
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".mainactivity"> <edittext android:layout_margintop="5dp" android:layout_width="match_parent" android:layout_height="50dp" android:background="@drawable/location_edittext" android:id="@+id/locationeditext" android:textsize="15sp" android:textcolor="#999" android:paddingleft="15dp" /> <com.example.ravi_gupta.slider.viewpagercustomduration android:layout_width="wrap_content" android:layout_height="0dp" android:id="@+id/viewpager" android:scrollbarstyle="outsideoverlay" android:layout_weight="0.5&quo
Read more

javascript - Parse JSON from the body of the POST -

-
i'm using cameratag.com record video on website. service can send json response server can save data database. don't know how proceed here: the documentation states please note json repsonse passed in body of post , not form parameters. here example of how parse response in ruby: data = json.parse(request.raw_post) video_uuid = data["uuid"] but don't know how data on javascript. i'm not experienced in js please bare me :) post sample: { "uuid": "00012710-4b65-0131-ffe6-22000a499ea4", "camera_uuid": "98373a20-79ee-0130-3e42-1231390fcc11", "created_at": "2013-12-20t05:25:02.000z", "percent_complete": 100, "short_code": "kktb4q", "metadata": { }, "state": "published", "recorded_from": "http://singwho.com", "publish_type": null, "formats": [ { "name&qu
Read more

javascript - Chrome Extension: Interacting with iframe embedded within popup -

-
i writing chrome extension needs interact urls user not have open. therefore using hidden iframes embedded within popup, , attempting click button within iframe. however, receiving same origin policy error. know possible extension interact iframes of different domain via content scripts when iframe on tab user has open, not sure if possible use content scripts interact iframes directly in popup. here code: manifest.json "content_scripts": [ { "js": [ "bin/jquery.min.js", "interaction.js" ], "all_frames": true, "run_at": "document_start", "matches": [ "http://*/*", "https://*/*" ] }], "permissions": [ "activetab", "tabs", "http://*/", "https://*/" ], interaction.js $(document).ready(function() { $('div#iframes').append("<iframe id='shop' src=
Read more