Color.setTransform() was introduced in Flash 5. It gives you precise control over the RGB values of a movieclip. Interesting visual effects such as turning a positive image into negative can be achieved using ActionScript. This sample includes a lightweight slider component.
Download Source File: Flash5_Color.setTransform.zip
Code:
r = r_original * (ra/100) + rb
g = g_original * (ga/100) + gb
b = b_original * (ba/100) + bb
ra, ga, ba { -100 .. +100 } (percentage)
rb, gb, bb { -255 .. +255 } (offset)
To invert an image use these values:
ra = ga = ba = -100
rb = gb = bb = +255
r = r_original * (-100/100) + 255 = 255 - r_original;
g = g_original * (-100/100) + 255 = 255 - g_original;
b = b_original * (-100/100) + 255 = 255 - b_original;