Author： David Reinig
procedure Emboss(ABitmap : TBitmap; AMount : Integer);
var
x, y, i : integer;
p1, p2: PByteArray;
begin
for i := 0 to AMount do
begin
for y := 0 to ABitmap.Height-2 do
begin
p1 := ABitmap.ScanLine[y];
p2 := ABitmap.ScanLine[y+1];
for x := 0 to ABitmap.Width do
begin
p1[x*3] := (p1[x*3]+(p2[(x+3)*3] xor $FF)) shr 1;
p1[x*3+1] := (p1[x*3+1]+(p2[(x+3)*3+1] xor $FF)) shr 1;
p1[x*3+2] := (p1[x*3+1]+(p2[(x+3)*3+1] xor $FF)) shr 1;
end;
end;
end;
end;