procedure Effect_GaussianBlur(Amount:integer;Picture:TBitmap);
var BB:TBitmap;
begin
BB :=TBitmap.Create;
BB.PixelFormat :=pf24bit;
BB.Assign(Picture.Bitmap);
GaussianBlur(BB,Amount);
Picture.Bitmap.Assign(BB);
BB.Free;
end;
procedure GaussianBlur(var clip:TBitmap;Amount:integer);
var
i:integer;
begin
for i:=Amount downto 0 do
SplitBlur(clip,3);
end;
procedure SplitBlur(var clip:TBitmap;Amount:integer);
var
p0,p1,p2:PByteArray;
cx,x,y:integer;
Buf:array[0..3,0..2] of byte;
begin
if Amount=0 then Exit;
for y:=0 to clip.Height-1 do
begin
if y-Amount<0 then
p1:=clip.Scanline[y]
else
p1:=clip.Scanline[y-Amount];
if y+Amount<clip.Height then
p2:=clip.Scanline[y+Amount]
else
p2:=clip.Scanline[clip.Height-y]
for x:=0 to clip.Width-1 do
begin
if x-Amount<0 then cx:=x;
Buf[0,0]:=p1[cx*3];
Buf[0,1]:=p1[cx*3+1];
Buf[0,2]:=p1[cx*3+2];
Buf[1,0]:=p2[cx*3];
Buf[1,1]:=p2[cx*3+1];
Buf[1,2]:=p2[cx*3+2];
if x+Amount<clip.Width then
cx:=x+Amount
else
cx:=clip.Width-x;
Buf[2,0]:=p1[cx*3];
Buf[2,1]:=p1[cx*3+1];
Buf[2,2]:=p1[cx*3+2];
Buf[3,0]:=p1[cx*3];
Buf[3,1]:=p1[cx*3+1];
Buf[3,2]:=p1[cx*3+2];
p0[x*3+1]:=(Buf[0,1]+Buf[1,1]+Buf[2,1]+Buf[3,1]) shr 2;
p0[x*3+2]:=(Buf[0,2]+Buf[1,2]+Buf[2,2]+Buf[3,2]) shr 2;
end;
end;
end;
