You could use the paletMap function or the threshold function of the
bitmapData object. Check the documentation for details.
Greetz Erik
On 2/28/08, Karim Beyrouti <[EMAIL PROTECTED]> wrote:
>
> Hello Hello,
>
> Just wondering if anyone has any tips or ideas on optimizing this
> function,
> as its really slow.. Basically, it creates an inverted alpha mask from a
> bitmap by going through every pixel in the bit map.
>
> Here is the function:
>
> <code>
>
> private function createInvertedMask() {
>
> var w:Number = mask_bitmap.width;
> var h:Number = mask_bitmap.height;
>
> var r:Number = 0;
> var c:Number = 0;
> var v:Number;
>
> for ( r = 0 ; r < w ; r++ ) {
>
> for ( c = 0 ; c < h ; c++ ) {
>
> v = mask_bitmap.getPixel32( r, c );
>
> if ( v == 0 ) {
>
> mask_bitmap.setPixel32( r, c ,
> 0xFF000000 );
>
> } else {
>
> mask_bitmap.setPixel32( r, c ,
> 0x00000000 );
>
> }
> }
> }
>
> }
>
> </code>
>
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