Adobe Air HTML & JS Developing - Slow on massive Image-Tags
Hello,
I want to share a problem i noticed while developing an application with adobe air, based on the HTML & JS Stack, which uses multiple image-tags at the same time. I already mailed a bug but unfortunately did not get a bug number responded to refer to hit here. This post is started because i wanted to share a simple example which exhibits the problem.
The Bug Report i mailed:
******BUG******
Concise problem statement: Performance Issues with massive Image-Tags (scaled)
Steps to reproduce bug:
1. Create a simple Air-Application. No need for any Air-specific library we just want the Air-Webkit to render a HTML-Page
2. Load ~130 Pictures with a dimension of approximately 1024 x 768 pixels. Render each of them as a scaled Image-Tag with the dimension 100x60 pixels.
3. Load the Page in the Air/Safari/Firefox/IE Environment (Versions: Air 2.5, Safari 5.0.2 (Win XP), FF 3.6.10, IE7)
4. Try scrolling down/left/right/up and resizing the respective stage
Results: The Air Environment performs worst among those 4. It reacts unacceptably slow while trying to resize and to scroll.
Expected results: similar performance to Webkit-Engine in Safari.
I know of one other discussion which seems to be related to a similar thing (http://forums.adobe.com/message/44913).
The Page i used to compare the Adobe-Air rendering & scroll behaviour against the behaviour of Safari, FF and IE is posted beneath (pretty long due to the excerpt of 131 pictures taken of flicker web service).
with best regards
Robert
<html>
<head>
<title>Mass Img Tags</title>
<script language="JavaScript">
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"Url": "http://www.envconst.com/Images/about_landscape_yard.jpg",
"ClickUrl": "http://www.envconst.com/Images/about_landscape_yard.jpg",
"RefererUrl": "http://www.envconst.com/about/landscape",
"FileSize": 39116,
"FileFormat": "jpeg",
"Height": "315",
"Width": "485",
"Thumbnail": {
"Url": "http://thm-a04.yimg.com/nimage/07706b565b3f956a",
"Height": "94",
"Width": "145"
"Title": "landscape02 JPG",
"Summary": "and Monet landscapes but with an Impressionistic approach I still want to re do the water reflections from the buildings and light but for now this will have to do Landscape Landscape close up Another example of the Virtual 3 D work I have been doing is",
"Url": "http://www.dustinhetrick.com/art/landscape02.JPG",
"ClickUrl": "http://www.dustinhetrick.com/art/landscape02.JPG",
"RefererUrl": "http://www.dustinhetrick.com/art.htm",
"FileSize": 475136,
"FileFormat": "jpeg",
"Height": "960",
"Width": "1280",
"Thumbnail": {
"Url": "http://thm-a02.yimg.com/nimage/99ff10027365797a",
"Height": "123",
"Width": "165"
"Title": "landscape 800 2 jpg",
"Summary": "",
"Url": "http://www.digital-cameras-help.com/landscapes/landscape-800-2.jpg",
"ClickUrl": "http://www.digital-cameras-help.com/landscapes/landscape-800-2.jpg",
"RefererUrl": "http://www.digital-cameras-help.com/wallpaper-landscape-1.html?id=2",
"FileSize": 42291,
"FileFormat": "jpeg",
"Height": "600",
"Width": "800",
"Thumbnail": {
"Url": "http://thm-a03.yimg.com/nimage/0609a5f1103b8ee4",
"Height": "116",
"Width": "155"
"Title": "landscape 800 1 jpg",
"Summary": "",
"Url": "http://www.digital-cameras-help.com/landscapes/landscape-800-1.jpg",
"ClickUrl": "http://www.digital-cameras-help.com/landscapes/landscape-800-1.jpg",
"RefererUrl": "http://www.digital-cameras-help.com/wallpaper-landscape-1.html?id=1",
"FileSize": 129843,
"FileFormat": "jpeg",
"Height": "600",
"Width": "800",
"Thumbnail": {
"Url": "http://thm-a04.yimg.com/nimage/755ad7377c2f381c",
"Height": "116",
"Width": "155"
"Title": "landscape 1024 9 jpg",
"Summary": "",
"Url": "http://www.digital-cameras-help.com/landscapes/landscape-1024-9.jpg",
Hi,
Thank you for reporting this. The internal bug number for the issue is #2740755. The issue is currently under review and will be investigated by one of AIR team members.
Regards,
Catalin
Similar Messages
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What is Adobe AIR HTML based development
Hi All,
I am a newbie in flex development. What is the difference between MXML based development and HTML based Development ?
Appreciate your answers.
Thanks,
Amithttp://www.adobe.com/products/air/faq.html
Adobe AIR is a cross-operating-system runtime that lets developers combine HTML, JavaScript, Adobe Flash® and Flex technologies, and ActionScript® to deploy rich Internet applications (RIAs) on a broad range of devices including desktop computers, netbooks, tablets, smartphones, and TVs. AIR allows developers to use familiar tools such as Adobe Dreamweaver®, Flash Builder®, Flash Catalyst®, Flash Professional, or any text editor to build their applications and easily deliver a single application installer that works across operating systems.
This program is required in order to run our media downloader that is used to archive files from Photoshop.com.
Pattie -
Adobe AIR HTML / Ajax Developement and Android
Just confirming... I haven't been developing in Flash since the days of Actionscript 2.0. I've been mostly doing HTML / Ajax dev the past couple of years. I started playing around with developing apps using HTML and Ajax. I read in another thread that for Android dev, you have to use flash. Is this true? If so, is there any plans to open this up more? I realize there might be some things that might not translate over, such as the touch interface, but I would really love to create some applications without having to get back into flash or learning Flash Builder.
Joe is correct on the support for HTML & AJAX. If you want to leverage those skills, you are going to have to stick with just using the on device web browser (which should be fairly robust) or look at alternate solutions like PhoneGap or Titanium's Appcelerator.
Chris -
Adobe Air - HTML, Javascript and Threading
Hello,
I am developing an application using Adobe Air - HTML and
Javascript. What I am trying to do is to implement threading in
Javascript. I am using implementing threading in Javascript as per
this Neil blog.
Click
Here. It clearly says that this threading works only in Firefox
2.0 and I am trying to use this in with my Adobe Air, but when I
try to refer a function , it gives me error saying "unable to find
it".
I was wondering if this is the best way to go for threading
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Thanks,
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The yield and generator functionality is only available in
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http://webkit.org/blog/189/announcing-squirrelfish/
If you can find a javascript library that works on safari /
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Adobe air html/js - application act like a browser.
I just started in Adobe air html/js . In the current application I want to do something like this .
I want to open the urls/web pages in the application and application should act like a web-browser to them .
But with that I want to modify the opened pages a little, like add some css/js to them.
Something like when you open Web pages in Firefox and a plugin (example grease monkey scripts) modifies the displayed content .
Is it possible ?
I tried opening in iframe it works , but I cannot add my own JavaScript to the page (is there any way in air to remove cross domain strictness?).
Note: Please don't suggest that I fetch the html content of the page and add it to the app body. My app should really act as browser. (Adobe air is webkit based so I think it can be achieved)Hi,
Thank you for reporting this. The internal bug number for the issue is #2740755. The issue is currently under review and will be investigated by one of AIR team members.
Regards,
Catalin -
AIR HTML/JavaScript becomes Slower / Sleep with time
Hi,
This strange behavior is observed on the 2 applications I tryed.
I've developped WikiDrop (http://wikidrop.encausse.net) a really basic TextEditor for DropBox.
- Build with Air 2.6
- Use HTML/JS API
- Used on Windows Vista
The application is launch for a long time waiting on a given computer.
Strange Behaviors:
- After couple of hours, displaying the main window seems to "wake up" webkit like if it was sleeping. It hang a little bit, or si slow.
- When editig few lines of text the TextArea seems to be "slow" it's not fluid like it could be on Chrome.
=> I do not setup complexe event handler.
=> I do not have listener or keystroke on TextArea.
Question:
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- Is there setup/parameters to improve performances ?
- Is there known issues about TextArea ? And workaround ?
- May be conflicting application ? (I know Vista is bad)
I've seens on this forum question about edition on large text file or many images but my use is really basic: only few lines of text. I got the same kind of issues with a little chat application. Text type in textarea for chat was sooo slow.
Best Regards,
JpHi,
Thank you for reporting this. The internal bug number for the issue is #2740755. The issue is currently under review and will be investigated by one of AIR team members.
Regards,
Catalin -
Adobe AIR Apps + Safari = Very slow
Hi everybody,
I'm experiencing a strange behaviour of my Adobe AIR Apps on iPad. I've tested several Apps now (one GPU-Heavy Game, one CPU-Blitting App, one pretty standard Puzzle) and all of them do have the same issue - as soon as Safari is running in the background it sometimes (not always.. and most likely on iPad1) slows my App down to 1fps. Until I close Safari again. I haven't ever seen any other App doing so, thus I believe it's an Adobe AIR bug. Maybe only on iPad though.
Does anyone know why this happens or if I can get around of that? Besides my Apps run superfast.
What I've tested so far is:
- My memory usage is ~4mb. Doesn't seem to bother him if it's more or not
- My GPU-Cache is held quite low (but even with empty GPU Cache this issue appears)
- I'm using an Enter-Frame in all my apps which simulates the rendertick. Maybe this may be the fault?!
Many thanks in advance,
Marvin.Furthermore:
- if the iPad was restarted you can have opened any iOS system-app without slowing down the Adobe AIR app
- nevertheless after some hours this bug occurs again.
Our game is in stores now: http://itunes.apple.com/us/app/ifunnel-frenzy-hd/id457822239?mt=8 and many people send us bugreports because of it. As soon as I'm telling them to close iOS system-apps things work superfine again.
You can download and test this bug for yourself - I think this might be pretty self-explaining then.
I'm a bit struggling how to solve this.. honestly. -
Adobe AIR HTML/JS application and Windows Native Installer
Hi,
I am building an Adobe AIR application with HTML and Javascript and I would like to know how to make an Windows Native Installer.
I am trying to build it with Flash Pro but it keeps returning the error 'Invalid SWF file'. At the application.xml file the <content> points to my index.html file. I don't use any SWF file. When I change this to point to the SWF it does build tha installer but the application loads the SWF.
Is there any way to build a Windows Native Installer and the initial content be an HTML file?
p.s. I tried to extract the files from the installer file and edit the application.xml there to point to the index.html. But I can't repackage the files to a valid air native installer.
Thank you.Hi,
Thank you for reporting this. The internal bug number for the issue is #2740755. The issue is currently under review and will be investigated by one of AIR team members.
Regards,
Catalin -
Opening pdf in AIR HTML browser developed using Flex
Hi,
I am trying to open a PDF in AIR Browser. The Air browser supports this only if i have installed the Acrobat reader 8.1 and above, for versions lower than 8.1 it is not supporting and not opening the PDF file. In another scenerio I have installed both Acrobat reader 9 and Acrobat proffessional 7 but the Air browser fails to open the PDF because it comparing the version against proffesssional instead reader. Actually the pdf should open in AIR browser since I have installed Acrobat Reader 9. Please suggest how to overcome this issue.I'm not sure I quite follow your original question. If you are asking if you load a local html file or set the htmltext of a HTML control in Adobe AIR and want to use @font-face, then I defer to Joe's answer.
But, if you set the location to a page on a web server and you have Adobe Air 1.5 installed, then @font-face does work. I tested this on two pages. One is http://www.taptaptap.com/ and the font Fertigo (which I don't have installed on my machine) showed up. I also tested it on http://www.zeldman.com/dwws/ which has fallback support for IE 4 and up. Some things to remember, IE does not support the format attribute in @font-face. And IE only supports .eot file format. However, as Joe mentioned, using local to see if the font is installed on the users machine to prevent blank space from showing, is not supported. Please refer to the list of unsupported web-kit features Joe mentions in another post.
Message was edited by: durbonix -
Hi,
I am trying to have Adobe AIR application to show some
non-english languages. I am using the following HTML code within
the body to show this character. It works correctly when i open
this file directly on IE or Firefox.
<p>a ആ b</p>
But when i run it as AIR application, I only see the english
letters. How do I make this unicode character appear.
Thanks
BinuHi jjalan,
The yield and generator functionality is only available in
Firefox's javascript execution engine. When you are executing
javascript in AIR, it is done by the webkit and squirrelfish. Take
a look at
http://webkit.org/blog/189/announcing-squirrelfish/
If you can find a javascript library that works on safari /
webkit, chances are high that it may work in AIR.
Also, you can always do pseudo-threading via the age old
setTimeout() -
Adobe AIR HTML Native Full Screen on Mac OS X
I am building an application in Adobe AIR for Mac in HTML/JavaScript.
What I want to do is when the application loads, make the application go into full-screen mode using the correct native full-screen found in OS X Lion and above.
e.g.
This is NOT using the displayState that Flash/Flex uses.
If the users decides to exit full screen mode they will see the app in a native window and can re-enter full screen mode using the icon you get in the top-right of a window.
I've found some information about an extension here: http://forums.adobe.com/thread/1209193
FREObject _EnableFullScreenMode(FREContext ctx, void* functionData, uint32_t argc, FREObject argv[])
//We should be okay to do this, even on 10.6, according to this post:
//http://www.cocoabuilder.com/archive/cocoa/311124-implementing-full-screen-for-10-7-but-app-should-also-run-on-10-6.html
//We can't use [NSApp mainWindow] - didn't appear to work
//This seems to though:
NSArray * allWindows = [NSApp windows];
if (allWindows.count > 0)
NSWindow *mainWindow = [allWindows objectAtIndex: 0];
NSWindowCollectionBehavior behavior = [mainWindow collectionBehavior];
behavior |= NSWindowCollectionBehaviorFullScreenPrimary;
[mainWindow setCollectionBehavior:behavior];
//TODO: Return a boolean instead depending on if we found the main window
return NULL;
That looks to do what I want! But after reading the Adobe AIR docs I can't get my head around where this code should live in my app directory and how I can call it on app load.
So in my index.html I have:
$(document).ready(function() { // Make window full-screen // CALL THE EXTENSION TO MAKE THE APPLICATION FULL_SCREEN // Make window active window.nativeWindow.activate(); // Make it visible window.nativeWindow.visible = true; });
The initialWindow is not visible by default using <visible>false</false> in the application descriptor XML file. And is made visible and active on the document ready as shown above.
The missing piece is loading in the extension and making the window go native full-screen.
To break this question up:
Where does the extension code go? E.g. do I create an extension file and put it in any particular location in the app directory?
How do I then load the extension into the application
Finally how do I then do the full-screen on document ready
What happens in OS X below Lion? How did full-screen work before it was introduced?
Hopefully I can get pointed in the right direction as the docs have totally baffled me and don't explain how the extension file is created (to me at least).Extensions require both native code and ActionScript code and are packed by the native extension compiler by Adobe to an ANE file. Check this tutorial: http://www.adobe.com/devnet/air/articles/building-ane-ios-android-pt1.html
After compiling the extension, you can put the extensionId into your <extensions> branch in the application.xml and add the .ane as an excluded library into your AS3 project. Then you can use the extension like any other external library (swc file).
It's also helpful to download and play around with extisting ANEs. There are some nice open source libraries here: https://github.com/freshplanet -
Cache-Control and Accept-Encoding support in Adobe AIR HTML Component
I am evaluating Adobe AIR's HTML component and trying to figure out what is supported.
I built the AIR app and had it point to www.google.com
I notice that the requests to fetch JS,CSS from Adobe AIR do not include Accept-Encoding: gzip header.
Does Adobe AIR's HTML Component support Accept-Encoding : gzip header ?
I also noticed that even though the content served with far futures expiry, i.e. has Cache-Control: maxage={value} subsequent requests are being made and content is not served from the browser's cache.
I observed this accross the app restarts.
Can someone please clarify support of the two above Http headers ?
Thank you.
-PrashantYou might also want to check out the useCache property to see if this helps. See these links:
http://forums.adobe.com/thread/726573
http://forums.adobe.com/thread/490497
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/html/HTMLLoader.h tml -
Adobe AIR HTML component ignores Google Maps GPolyline opacity
I have a Google Maps mashup web site that I want to display
in an
Adobe AIR app using the AIR HTML component. My mashup shows a
Google map with some semi-
transparent polylines (drawn as circles) drawn with the
Google Maps API . In Safari, everything looks
as it should. In AIR, the polylines are opaque; the GPolyline
opacity
value is ignored. I've tried the AIR app on Linux and Windows
XP.
Has anyone else encountered this issue or have some
suggestions?
The web site:
http://dstresearch.com/map.html
The AIR code:
<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication xmlns:mx="
http://www.adobe.com/2006/mxml"
layout="absolute" height="800" width="800">
<mx:HTML id="html"
width="100%"
height="100%"
location="
http://dstresearch.com/map.html"
/>
</mx:WindowedApplication>
Thanks,
JoshYou might also want to check out the useCache property to see if this helps. See these links:
http://forums.adobe.com/thread/726573
http://forums.adobe.com/thread/490497
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/html/HTMLLoader.h tml -
Suitability of Adobe AIR / HTML /JS
I have a task to built a simple Digital signage system which will display different kind of information on LCD panels.
I am not sure if Adobe AIR with HTML / Javascript would be a good choice for the desktop part of this application, which will be responsible for displaying the content. The logics could be easily solved and coded in Javascript and the app should run for a long time. The backend application for managing content will be web based.
Maybe it would be better to use FLex instead. What do you think?
Thanks for any recommendations.Hi,
Thank you for reporting this. The internal bug number for the issue is #2740755. The issue is currently under review and will be investigated by one of AIR team members.
Regards,
Catalin -
Retina support for Adobe AIR HTML
Hi,
I was suprised to find there's no retina display support for Adobe AIR (3.9).
Macs with retina displays have been around for quite some time now.
This is a crucial feature as I will not be able to use my application on my retina display.
A bug report has been opened here: https://bugbase.adobe.com/index.cfm?event=bug&id=3662094
Thanks.Hi Jeffrey,
This is indeed an issue with the HTML control, however the StageWebView(true) control does support retina devices. Is it possible for you to use this instead?
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/media/StageWebVie w.html#StageWebView()
Thanks,
Chris
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