I know what the following does and if you've used the Avatar Sizer program you've used it!
procedure (Src, Dst: TBitmap);
var
x, y: Integer;
xP, yP: Integer;
xP2, yP2: Integer;
SrcLine1, SrcLine2: pRGBArray;
t3: Integer;
z, z2, iz2: Integer;
DstLine: pRGBArray;
DstGap: Integer;
w1, w2, w3, w4: Integer;
begin
:= 0;
:= pred( );
;
:= pf24Bit;
:= pf24Bit;
if ( = ) and ( = ) then
(Src)
else
begin
DstLine := [0];
DstGap := Integer( [1]) - Integer(DstLine);
xP2 := MulDiv(pred( ), $10000, );
yP2 := MulDiv(pred( ), $10000, );
yP := 0;
for y := 0 to pred( ) do
begin
:= y;
xP := 0;
SrcLine1 := [yP shr 16];
if (yP shr 16 < pred( )) then
SrcLine2 := [succ(yP shr 16)]
else
SrcLine2 := [yP shr 16];
z2 := succ(yP and $FFFF);
iz2 := succ((not yp) and $FFFF);
for x := 0 to pred( ) do
begin
t3 := xP shr 16;
z := xP and $FFFF;
w2 := MulDiv(z, iz2, $10000);
w1 := iz2 - w2;
w4 := MulDiv(z, z2, $10000);
w3 := z2 - w4;
DstLine[x].rgbtRed := (SrcLine1[t3].rgbtRed * w1 +
SrcLine1[t3 + 1].rgbtRed * w2 +
SrcLine2[t3].rgbtRed * w3 + SrcLine2[t3 + 1].rgbtRed * w4) shr 16;
DstLine[x].rgbtGreen :=
(SrcLine1[t3].rgbtGreen * w1 + SrcLine1[t3 + 1].rgbtGreen * w2 +
SrcLine2[t3].rgbtGreen * w3 + SrcLine2[t3 + 1].rgbtGreen * w4) shr 16;
DstLine[x].rgbtBlue := (SrcLine1[t3].rgbtBlue * w1 +
SrcLine1[t3 + 1].rgbtBlue * w2 +
SrcLine2[t3].rgbtBlue * w3 +
SrcLine2[t3 + 1].rgbtBlue * w4) shr 16;
Inc(xP, xP2);
end; {for}
;
Inc(yP, yP2);
DstLine := pRGBArray(Integer(DstLine) + DstGap);
end; {for}
end; {if}
end; {SmoothResize}
Does that make me a real geek?

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