Make a color in image transparent on the fly

[repairman123]

Hi I am trying to load an image and at runtime pick the white background of the
image as transparent. Can any one point me to the flex/flash libraries that
may help w/ this? basically I have 2 images both of them have white
background. I want to be able to drag and drop them so that the main objects
of the images are side by side. But the problem is each image has thick white
borders. so i figure if i can dynamically choose white color in the image to
be transparent then I can overlap them and the white borders will be
transparent and won't get in the way. Any expert can point me to the right
direction?

[doug777]

Perhaps you could create the image with a transparent background and place it
on a separate box with a white background and nothing else. When you start the
drag, remove the white box from the display list. If drag fails put it back.

Doug

[repairman123]

doug777, thanks for the reply. My issue is that the image I am trying to place
next to each other is some images off the web i.e. I don't have control over
the image transparent color. that's why I want to find a way to on the fly set
which color in the images will be transparent. I was hoping flex has some
library for that

[VarioPegged]

Flex does have a library for manipulating bitmap data. Look into Bitmap, BitmapData, etc.

TS