How to change BitmapData with Native Extension?

Hi,

how can i modify bitmapdata with ANE without copy/clone?

I want to send bitmapdata to native extension (iOS), then changes bitmapdata pixels, then I want to see changed Bitmap (which uses this bitmapdata) on stage.

My code:

ActionScript

bd = new BitmapData(300,300,true,0x00000000); //create bitmapdata

bd.fillRect(bd.rect,0xff0000FF);

var btm:Bitmap; //create bitmap

btm = new Bitmap(bd);

addChild(btm);

myExtension = new MyExtension(); //create extension instance

myExtension.ChangeBitmapData(bd);

//bitmap stay same

iOS

FREObject ChangeBitmapData(FREContext ctx, void* funcData, uint32_t argc, FREObject argv[])

{

    // Obtain access to the bitmap data pixels ..

    FREBitmapData bmd;

    FREAcquireBitmapData(argv[0], &bmd);

    // We'll now loop over each pixel write them into the AS3 bitmapData memory

    int x, y;

    // There may be extra pixels in each row due to the value of

    // bmd.lineStride32, we'll skip over those as needed

    int offset = bmd.lineStride32 - bmd.width;

    uint32_t *bmdPixels = bmd.bits32;

    for(y=0; y<bmd.height; y++) {

        for(x=0; x<bmd.width; x++, bmdPixels ++) {

            // Values are currently in RGBA8888, so each colour

            // value is currently a separate number

            int red   = x % 2 == 0 ? 0 : 255;

            int green = 0;

            int blue  = 0;

            int alpha = 255;

            // Combine values into ARGB32

            * bmdPixels = (alpha << 24) | (red << 16) | (green << 8) | blue;

        }

        bmdPixels += offset;

    }

    FREReleaseBitmapData(argv[0]);

    return nil;

}

Where's error? How to change pixels correctly? Please help.