PCXflip: Delphi Version

{*****************************************************************************
*                                                                            *
*  PCXflip.dpr                                                               *
*  PCXflipU.pas                                                              *
*                                                                            *
*  This program displays a 320x200 PCX file mirrored about the y-axis using  *
*  the bitmap display routines.                                              *
*                                                                            *
*****************************************************************************}
unit PCXflipU;
interface
uses
  SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls,
  Forms, Dialogs, FGWin;
type
  TForm1 = class(TForm)
    procedure AppOnActivate(Sender: TObject);
    procedure FormActivate(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure FormPaint(Sender: TObject);
    procedure FormResize(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
  end;
var
  Form1: TForm1;
implementation
{$R *.DFM}
const
  vbWidth  = 320;
  vbHeight = 200;
var
  dc   : hDC;
  hPal : hPalette;
  hVB  : integer;
  cxClient, cyClient : integer;
procedure TForm1.AppOnActivate(Sender: TObject);
begin
  fg_realize(hPal);
  Invalidate;
end;
procedure TForm1.FormActivate(Sender: TObject);
begin
  fg_realize(hPal);
end;
procedure TForm1.FormCreate(Sender: TObject);
var
  Bitmap : pointer;
begin
  dc := GetDC(Form1.Handle);
  fg_setdc(dc);
  hPal := fg_defpal;
  fg_realize(hPal);
  fg_vbinit;
  hVB := fg_vballoc(vbWidth,vbHeight);
  fg_vbopen(hVB);
  fg_vbcolors;
  fg_showpcx('MOUSE.PCX'+chr(0),FG_AT_XY);
  Bitmap := GlobalAllocPtr(GMEM_MOVEABLE,fg_imagesiz(vbWidth,vbHeight));
  fg_move(0,vbHeight-1);
  fg_getimage(Bitmap^,vbWidth,vbHeight);
  fg_revimage(Bitmap^,vbWidth,vbHeight);
  GlobalFreePtr(Bitmap);
  Application.OnActivate := AppOnActivate;
end;
procedure TForm1.FormPaint(Sender: TObject);
begin
  fg_vbscale(0,vbWidth-1,0,vbHeight-1,0,cxClient-1,0,cyClient-1);
end;
procedure TForm1.FormResize(Sender: TObject);
begin
  cxClient := ClientWidth;
  cyClient := ClientHeight;
  Invalidate;
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
  fg_vbclose;
  fg_vbfree(hVB);
  fg_vbfin;
  DeleteObject(hPal);
  ReleaseDC(Form1.Handle,dc);
end;
end.