[Solved] same example but it gives different values

barakli

Newbie
Posts: 3

[Solved] same example but it gives different values

« on: August 06, 2014, 10:27:06 pm »

i have two same examples. But two examples have different gray scale image. why it is different?

first example code is:

Code: [Select]

procedure TForm1.Button1Click(Sender: TObject);
var
  IntfImg1, IntfImg2: TLazIntfImage;
  px, py: Integer;
  Row1, Row2: PRGBTripleArray;
  abitmap:TBitmap;
begin
  abitmap:=TBitmap.Create;
  abitmap.LoadFromFile('bb.bmp');
  IntfImg1:=abitmap.CreateIntfImage;
  IntfImg2:=TLazIntfImage.Create(0,0);
  IntfImg2.LoadFromBitmap(aBitmap.Handle,aBitmap.MaskHandle);

   for py:=0 to IntfImg1.Height-1 do begin
     Row1 := IntfImg1.GetDataLineStart(py); //like Delphi TBitMap.ScanLine
     Row2 := IntfImg2.GetDataLineStart(py); //like Delphi TBitMap.ScanLine
     for px:=0 to IntfImg1.Width-1 do begin
       Row2^[px].rgbtRed    :=  round((Row1^[px].rgbtRed+Row1^[px].rgbtGreen+Row1^[px].rgbtBlue)/3);
       Row2^[px].rgbtGreen  :=  round((Row1^[px].rgbtRed+Row1^[px].rgbtGreen+Row1^[px].rgbtBlue)/3);
       Row2^[px].rgbtBlue   :=  round((Row1^[px].rgbtRed+Row1^[px].rgbtGreen+Row1^[px].rgbtBlue)/3);
     end;
   end;

   Image1.Stretch:=True;
   Image1.Picture.Bitmap.LoadFromIntfImage(IntfImg2);
end;

second code is:

Code: [Select]

procedure TForm1.Button2Click(Sender: TObject);
  var
  IntfImg1, IntfImg2: TLazIntfImage;
  px, py: Integer;
  Row1, Row2: PRGBTripleArray;
  abitmap:TBitmap;
  CurColor: TFPColor;
begin
   abitmap:=TBitmap.Create;
   abitmap.LoadFromFile('bb.bmp');
   IntfImg1:=abitmap.CreateIntfImage;
   IntfImg2:=TLazIntfImage.Create(0,0);
   IntfImg2.LoadFromBitmap(aBitmap.Handle,aBitmap.MaskHandle);

    for py:=0 to IntfImg1.Height-1 do begin
      Row1 := IntfImg1.GetDataLineStart(py); //like Delphi TBitMap.ScanLine
      Row2 := IntfImg2.GetDataLineStart(py); //like Delphi TBitMap.ScanLine
      for px:=0 to IntfImg1.Width-1 do begin
        CurColor:=IntfImg1.Colors[px,py];
        CurColor.red    :=  round((CurColor.red+CurColor.green+CurColor.blue)/3);
        CurColor.green  :=  round((CurColor.red+CurColor.green+CurColor.blue)/3);
        CurColor.blue   :=  round((CurColor.red+CurColor.green+CurColor.blue)/3);
        IntfImg2.Colors[px,py]:=CurColor;
      end;
    end;

    Image1.Stretch:=True;
    Image1.Picture.Bitmap.LoadFromIntfImage(IntfImg2);
end;