java - Android Bitmap/Canvas offset after scale

Question

If I have a canvas, on which I draw a Bitmap like this:

canvas.drawBitmap(bmLargeImage, srcRect, destRect, paint);

and I scale the bitmap:

canvas.scale(1.5f, 1.5f, 450, 250);

I want to get the position of the Bitmap after the scale. If the position before scale was (0, 0), after scale there is a offset and I need that offset.. how can I get it?

Thanks and sorry for the simple question, newbie here...

Answer 1

Ok lets try to work out the best formula for this

canvas.scale(scaleX, scaleY, pivotX, pivotY);  

if (scaleX >= 1){    
  objectNewX = objectOldX + (objectOldX - pivotX)*(scaleX - 1); 
}else{   
  objectNewX = objectOldX - (objectOldX - pivotX)*(1 - scaleX); 
}

The same for objectNewY. The new width and height of the bitmap would of course be the multiple of the old size and scale.