How to scale around point using BitmapData

I've searched but haven't found anyone wanting to do this with a bitmapData object.

I'm using the following code:

matrix.identity();
matrix.transl开发者_开发百科ate(pan.x, pan.y);
matrix.translate(-zoomPoint.x, -zoomPoint.y);
matrix.scale(scale, scale);
matrix.translate(zoomPoint.x, zoomPoint.y);

// later my draw call
this.bitmapData.draw(srcBitmap, matrix, null, null, null, true);

pan is a Point containing translation values scale contains 0..1 zoomPoint is a Point containing a mouse click

Panning works, but using this method scale does not scale around my mouse. Has anyone done this successfully?

Thanks.

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The matrix will translate the scale first, so you might have to take that into account when you set the translation. I needed to scale and select an area previously, and came up with this: BitmapData - scale and select area in one matrix?

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This Works:

var scale:Number = 0.32;

var matrix:Matrix = new Matrix();

matrix.scale(scale, scale);

var smallBMD:BitmapData = new BitmapData(bigBMD.width * scale, bigBMD.height * scale, true, 0x000000);

smallBMD.draw(bigBMD, matrix, null, null, null, true);

var bitmap:Bitmap = new Bitmap(smallBMD, PixelSnapping.NEVER, true);