main.pas

Jasper jpeg2000 from delphi

unit main;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls, ExtDlgs;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Image1: TImage;
    Button2: TButton;
    OpenDialog: TOpenDialog;
    SaveDialog: TSaveDialog;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

uses
  jp2img,
  jpeg;

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
  //OpenPictureDialog.FileName := 'C:\Test\Jpeg2000\file1.jp2';
  //OpenPictureDialog.FileName := 'C:\Test\Jpeg2000\cats.pnm';
  //OpenPictureDialog.FileName := 'C:\Test\Clipboard.bmp';
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  if not OpenDialog.Execute then exit;
  try
    Image1.Picture.LoadFromFile(OpenDialog.FileName);
  except
    Image1.Picture.Graphic := nil;
  end;
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  B : TBitmap;
begin
  if not SaveDialog.Execute then exit;
  //simple, if graphic is jp2
  //Image1.Picture.SaveToFile(SaveDialog.FileName);
  B := TBitmap.Create;
  try
    //convert to bitmap if necessary (if jpeg)
    B.Assign(Image1.Picture.Graphic);
    JasperSaveToFile(SaveDialog.FileName, B, 0.10);
    B.Assign(Image1.Picture.Graphic);
    //for example, to test PNM text output
    //JasperSaveToFile(SaveDialog.FileName, Image1.Picture.Bitmap, 0, 'text');
  finally
    B.Free;
  end;
end;

initialization
  TJP2Image.RegisterFileFormats;
end.