RE: [flexcoders] cropping image...with Copypixels

Andrew Trice Thu, 12 Oct 2006 08:33:11 -0700

Instead of using copyPixels, try something like this… This function crops the bitmapData to the width and height with respect to the center of the image.

public function centerAndCrop( bitmapData : BitmapData, cWidth : Number, cHeight : Number ) : BitmapData {

if(cWidth > bitmapData.width) cWidth = bitmapData.width;

if(cHeight > bitmapData.height) cHeight = bitmapData.height;

if(cWidth < 1 || cHeight < 1) return bitmapData

var translateMatrix : Matrix = new Matrix();

var xOffset : Number = -Math.abs((bitmapData.width - cWidth)/2);

var yOffset : Number = -Math.abs((bitmapData.height - cHeight)/2);

translateMatrix.identity();

translateMatrix.translate(xOffset, yOffset);

var returnBitmapData : BitmapData = new BitmapData(cWidth, cHeight, true);

returnBitmapData.draw(bitmapData, translateMatrix);

return returnBitmapData;

}

Hope that helps.

-Andy

_____________________________________

Andrew Trice

Cynergy Systems, Inc.

http://www.cynergysystems.com

Blog: http://www.cynergysystems.com/blogs/page/andrewtrice

Email: [EMAIL PROTECTED]

Office: 866-CYNERGY

From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of learner
Sent: Thursday, October 12, 2006 3:37 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] cropping image...with Copypixels

hello ,

I am trying to do cropping of image which is dynamically assigned to a vbox component
and i have used following Code:

var bd : BitmapData = new BitmapData(h,w);
var m1 : Matrix = new Matrix();
bd.draw (target, m1);
var puzzlePieceBmp:BitmapData = new BitmapData(target.width,target.height);
puzzlePieceBmp.copyPixels(bd, new Rectangle(x1,y1,h,w), new Point(0, 0));
imageid.source = puzzlePieceBmp;

this is not working properly, The cropped portion is not of desired height and width, Can any body suggest me how the Rectangle parameter works for copypixesl method.
Its been more than 2 days i am working on this part and i tired searching all forum ..reading live docs about copypixels but no gain
please guide me in this. Or any one can point me to some URL where the cropping in flex is demonstrated.
I would be very grateful
Regards
PS

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RE: [flexcoders] cropping image...with Copypixels

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