Comments on: A Class for Managing BitmapDatas

By: Alex

Alex — Thu, 11 Jun 2009 16:06:08 +0000

Ok, guys, looks like I've managed to fix the bug - now I'm able to use multiple bitmap libs. Here is the fix: BitmapLibraryManager.as line 92 WAS: if(library[ a_name ] != null ) NOW: if(library.hasOwnProperty(a_name) == true )

Please check out if it is a valid solution!

By: Alex

Alex — Thu, 04 Jun 2009 17:06:49 +0000

I’m not sure if I’ll be able to find a solution (sorry, just started to learn AS3), but I’ll try! As a temp solution – I just use only one bitmaps library for now – my current project is of compact scale, so I’m ok with it for now.

By: urbansquall

urbansquall — Thu, 04 Jun 2009 15:10:03 +0000

Unfortunately, Alex, it is going to be a week at least before I can dig into the code and get it fixed. If you’re in a rush I would definitely recommend taking a shot at fixing it yourself (and posting the solution). Thanks!

By: Alex

Alex — Thu, 04 Jun 2009 12:05:35 +0000

Ok, got it and have to agree. I've got a problem using the BitmapLibraryManager class, and I'm not sure where is my fault as seems like I'm doing everything right. At start I create and register the libs:

var BL_BG : BitmapLib_BG = new BitmapLib_BG(); BitmapLibraryManager.registerBitmapLibrary(BL_BG); var BL_UI : BitmapLib_UI = new BitmapLib_UI(); BitmapLibraryManager.registerBitmapLibrary(BL_UI);

After that I can sucessfully call BitmapLibraryManager.createBitmap() to create bitmaps, but ONLY those that are defined in FIRST lib (BL_BG), and when I try to create bitmap that was defined in second lib - I've got an error during execution! I tried to swap libs - same result - only first lib get registered and its bitmaps can be used.

By: urbansquall

urbansquall — Wed, 03 Jun 2009 16:00:40 +0000

It’s been some time since I last reviewed this code. I believe I was discouraging access to the bitmapData because that would let client code manipulate the stored version of the bitmapData which violates part of the responsibility of the manager.

By: Alex

Alex — Wed, 03 Jun 2009 14:44:29 +0000

This is a great class I already use, one question though – why didn’t you include a method like getBitmapData() along with createBitmap()? I guess it may conflict with general architecture, but I can’t see why exactly.

By: tafty

tafty — Sun, 09 Nov 2008 12:57:37 +0000

Hi there, really enjoying the blog. Very informatiove and well written. I tried out the BitmapLibraryManager but it threw an error in the createBitmap method when a second library class was added. I considered using describeType to query whether an image existed but in the end I’ve fixed it the quick and dirty way; by putting the if( library[ a_name ] != null ) {…} statement with a try…catch block. Keep up the good work!

By: Panayoti

Panayoti — Mon, 03 Nov 2008 18:42:40 +0000

Nope, that sounds like a great way to do it.

By: Gambrinous

Gambrinous — Sun, 02 Nov 2008 12:46:05 +0000

Thanks for the code - was looking to do something very similar when I came across this. What do you think would be the best way to model game tiles using this? I'm very new to flex so I'm not very clear on the best way.

I have a class for tiles which extends Bitmap; I then use a map (2d array) of tiles created from a map editor which at start up is init'd to be an array of GameTiles. I set the .bitmapData of each new GameTile as they are init'd for the first time (via your BitmapLibraryManager).

Am I going about this the wrong way?