Read raw RGBA data from PNG file

[yossim]

I need to get the exact RGBA values from a PNG file I have in the library.
When using the BitmapData class, I get premultiplied values.
It changes the original data by multipling the RGB with the Alpha channel.

How can I get the original data from the PNG?

Thanks.

[panel]

you should use


bitmapData.getPixel32()


example from help


import flash.display.BitmapData;

var bmd:BitmapData = new BitmapData(80, 40, true, 0xFF44AACC);

var pixelValue:uint = bmd.getPixel32(1, 1);
var alphaValue:uint = pixelValue >> 24 & 0xFF;
var red:uint = pixelValue >> 16 & 0xFF;
var green:uint = pixelValue >> 8 & 0xFF;
var blue:uint = pixelValue & 0xFF;

trace(alphaValue.toString(16)); // ff
trace(red.toString(16)); // 44
trace(green.toString(16)); // aa
trace(blue.toString(16)); // cc

[yossim]

getPixel32 does not feet my needs, since there is a lose of information.

As I mentioned in the question (and also described in the help)
this function gives the premultiplied values.
It means that if the Alpha value is not FF, the RGB values I get are already multiplied with the Alpha.

I need the original RGBA values.

[senocular]

BitmapData is all you have

[yossim]

I'll probably have to use only the RGB channels.

Thanks anyway