using parameters in convolutionfilter

hi;

I want to use a convolutionfilter on a bitmap and i copied the following code:

this._emboss = new ConvolutionFilter(3, 3, [
                2, 0, 0,
                0, -1, 0,
                0, 0, -1
            ], 3, 0x80);
   this.findata.applyFilter(this.findata, findata.rect, new Point(0,0), this._emboss)

but i get an embossed gray image and i have not the colors of my image.What can i do;

i think it's a matter of alpha.

i don't understand the use of parameters:in convolutionfilter ,there are 9 parametersin the function;how can i manage if i want use only 5 parameters

as in the given example.

What are the parameters in the example?

i would write:

this._emboss = new ConvolutionFilter(3, 3, [
                2, 0, 0,
                0, -1, 0,
                0, 0, -1
            ], 3, 0x80,null,null,null,null);
or

this._emboss = new ConvolutionFilter(3, 3, [
                2, 0, 0,
                0, -1, 0,
                0, 0, -1
            ], 3,null,null,null, 0x80,null);

if 0x80 is corresponding to the color parameter