【鼎革‧革鼎】︰ Raspbian Stretch 《六之 E 》

Flash 的時代終將過去︰

Adobe Flash Player

Adobe Flash Player(在Internet ExplorerFirefox被稱為Shockwave Flash[2]是一種廣泛使用的、專有的多媒體程式播放器。它最初由Macromedia編寫,在Macromedia被Adobe收購後由Adobe繼續開發。

Flash Player使用的SWF檔案可由Adobe AnimateAdobe Flex或者其他軟體或第三方工具建立。Adobe Animate簡稱Flash,同時表示創作程式和播放器。它同時使用點陣圖向量圖形,利用ActionScript手 稿語言進行編程,支援雙向影片流和音訊流。嚴格來說,Adobe Flash是創作環境而Flash Player是執行Flash檔案的虛擬機器。但是,通常二者均可稱為Flash,即Flash同時有三種含義:創作環境,播放器和程式檔案。Flash Player支援內嵌的手稿語言ActionScript(AS)。ActionScript是一種基於ECMAScript的手稿語言,可用於編寫Adobe Flash動畫和應用程式。由於ActionScript和JavaScript都是基於ECMAScript語法的,理論上它們互相可以很流暢地從一種語言翻譯到另一種。Adobe Flash Player最初設計目的為播放二維向量動量,但至此之後成為適合開發創造豐富型網際網路應用程式、串流視訊音訊的工具。Flash Player使用向量圖形的技術來最小化檔案的大小以及創造節省網路頻寬和下載時間的檔案。因此Flash成為嵌入網頁中的小遊戲、動畫、廣告、以及圖形使用者介面常用的格式。

因Flash的諸多限制和資訊安全問題,合作夥伴包括AppleFacebookGoogle微軟Mozilla等合作下棄用 Flash 預載,以及HTML5的興起,Flash Player的使用逐年下滑。 Adobe於2017年7月25日宣布於2020年12月30日停止更新和發行Flash Player。[3]

 

進入 HTML5 之紀元也︰

HTML5test

HTML5test is a web application for evaluating a web browser‘s accuracy in implementing the web standards HTML5 and Web SQL Database (developed by the World Wide Web Consortium), as well as the WebGL standard (developed by the Mozilla Foundation and the Khronos Group).[2]

The test suite was developed by Dutch web programmer Niels Leenheer, and published in March 2010.[3] To test a web browser, the user must visit the home page of the website html5test.com.[4] The application returns an integer score out of a possible 555 points. The point total has changed multiple times through the evolution of the software; Leenheer introduced the present scoring system as part of a major redesign of the test introduced in November 2013.[5]

HTML5test evaluates the browser’s support for Web storage, the W3C Geolocation API, HTML5-specific HTML elements (including the canvas element), and other features.[6][7] It does not evaluate a browser’s conformance to other web standards, such as Cascading Style Sheets, ECMAScript, Scalable Vector Graphics, or the Document Object Model. Conformance testing for those standards is within the purview of Acid3, an automated test published by Ian Hickson in 2008.[8] Similarly, Acid3 does not evaluate a browser’s HTML5 conformance. The test scope of HTML5test and the test scope of Acid3 are mutually exclusive.

 

目前 樹莓派上使用的 Chrome Dev 60.0.3112.89 版本瀏覽器,得分還頗高的哩︰

 

預設為不開啟 flash ︰

pi@raspberrypi:~ cd /usr/lib/chromium-browser pi@raspberrypi:/usr/lib/chromium-browser ls libpepflashplayer.so -l
-rw-r--r-- 1 root root 20458984 10月 21 05:36 libpepflashplayer.so
pi@raspberrypi:/usr/lib/chromium-browser $

 

眼下論壇所講

Re: Flash Player now available for Chromium

Tue Mar 07, 2017 6:06 am

If you go to
chrome:plugins
in the address bar.
Does it show you the flash version?

 

chrome:plugins 查詢設定方法,恐發生如下之錯誤訊息︰

 

據谷歌

Cat-Friend說:

Hello Paul

 
Many thanks for your message. And welcome to the Google Chrome Help Forum.
The chrome://plugins Page has been removed in Chrome 57 and is no more available!
 
Please do this to access the Flash and PDF Reader Settings:
  1. Click the 3-Dot Icon (), then choose Settings, then Advanced Settings
  2. Scroll down and choose “Content Settings
  3. (Or use this Link to go directly go to the Dialog: chrome://settings/content)
  4. Change your Flash and PDF Reader Settings as needed
Please let me know if this helps.
Kind regards, Cat-Friend

 

貓友所說, Chrome 57 後就已如此。故依言而行︰

 

致 PhET 之愛好者