Comments on: How to crop with AS3

By: Matt

Matt — Sat, 06 Aug 2011 13:12:50 +0000

Thanks for offering this code. Much apprciated

-Matt

By: Swaroop

Swaroop — Wed, 20 Apr 2011 04:52:59 +0000

Hi Mark,

Thanks a lot for reply.

In my scenario I cant mask the image. Complete image should be visible to user. There is another transparent movieclip having irregular shape in it. I am placing this movieclip on my main image. User will drag, scale and rotate the image, so that some part of image will fit in that irregular shape.

When I call the crop function, I am getting a bitmap but it is having white background. This white background is coming because my shape is not at 0,0 (x,y) inside movieclip. When I place the shape at 0,0 location inside the movieclip, I get what I want but I dont want to keep shape at 0,0 inside movieclip.

Please help.

By: Mark

Mark — Tue, 19 Apr 2011 13:55:35 +0000

Hi Swaroop, you should mask the image with the custom shape and then use the crop function I guess..

By: Swaroop

Swaroop — Tue, 19 Apr 2011 07:35:58 +0000

I want to crop image in irregular shape.
How can I acheive this.

Thanks in Advance.

By: Mark

Mark — Wed, 02 Feb 2011 08:57:06 +0000

Hi Cal, how do you call the crop function?

By: Cal

Cal — Tue, 01 Feb 2011 23:28:04 +0000

Hi, I tried this but got these errors:

1120: Access of undefined property _x.
1120: Access of undefined property _y.

I imported the Matrix class. Why do you think it’s throwing this error?

By: inzam

inzam — Thu, 13 Jan 2011 05:22:40 +0000

if you want crop any image, than i will suggest you to visit the link below
http://www.raiseitsolutions.com/forum/viewtopic.php?f=4&t=2
if you visit this link, you will know how to crop an image easily
thank you very much.

By: T3P

T3P — Wed, 22 Dec 2010 18:37:35 +0000

And this one, crop and resize…

/**
*
* @param $target
* @param $source
* @param $cropArea
* @param $colorTransform
* @param $blendMode
* @param $smoothing
* @return
*/
public static function transform( $target:BitmapData, $source:BitmapData, $cropArea:Rectangle=null, $colorTransform:ColorTransform=null, $blendMode:String=null, $smoothing:Boolean=true ):BitmapData{
if( $target==null || $source==null ) return null ;
//
$cropArea= ($cropArea)? $cropArea : $source.rect ;
//
var matrix :Matrix= new Matrix();
matrix.a= $target.width/$cropArea.width ;
matrix.d= $target.height/$cropArea.height ;
matrix.tx= -$cropArea.x*matrix.a ;
matrix.ty= -$cropArea.y*matrix.d ;
//
$target.draw( $source, matrix, $colorTransform, $blendMode, $target.rect, $smoothing ) ;
return $target ;
}