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{
Free Pascal port of the OpenPTC C++ library.
Copyright (C) 2001-2003 Nikolay Nikolov (nickysn@users.sourceforge.net)
Original C++ version by Glenn Fiedler (ptc@gaffer.org)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
}
Constructor TDirectXLibrary.Create;
Var
DirectDrawCreate : TDirectDrawCreate;
IID_IDirectDraw2 : GUID;
Begin
{ defaults }
m_lpDD := Nil;
m_lpDD2 := Nil;
m_library := 0;
Try
LOG('loading ddraw.dll');
m_library := LoadLibrary('ddraw.dll');
If m_library = 0 Then
Raise TPTCError.Create('could not load ddraw.dll');
LOG('importing DirectDrawCreate');
DirectDrawCreate := TDirectDrawCreate(GetProcAddress(m_library, 'DirectDrawCreate'));
If DirectDrawCreate = Nil Then
Raise TPTCError.Create('could not get address of DirectDrawCreate');
LOG('creating lpDD');
DirectXCheck(DirectDrawCreate(Nil, @m_lpDD, Nil));
With IID_IDirectDraw2 Do
Begin
Data1 := $B3A6F3E0;
Data2 := $2B43;
Data3 := $11CF;
Data4[0] := $A2;
Data4[1] := $DE;
Data4[2] := $00;
Data4[3] := $AA;
Data4[4] := $00;
Data4[5] := $B9;
Data4[6] := $33;
Data4[7] := $56;
End;
LOG('querying lpDD2');
DirectXCheck(m_lpDD^.lpVtbl^.QueryInterface(m_lpDD, @IID_IDirectDraw2, @m_lpDD2));
Except
On error : TPTCError Do
Begin
{ close }
close;
{ rethrow }
Raise TPTCError.Create('could not initialize ddraw', error);
End;
End;
End;
Destructor TDirectXLibrary.Destroy;
Begin
close;
Inherited Destroy;
End;
Procedure TDirectXLibrary.close;
Begin
If m_lpDD2 <> Nil Then
Begin
LOG('releasing lpDD2');
m_lpDD2^.lpVtbl^.Release(m_lpDD2);
m_lpDD2 := Nil;
End;
If m_lpDD <> Nil Then
Begin
LOG('releasing lpDD');
m_lpDD^.lpVtbl^.Release(m_lpDD);
m_lpDD := Nil;
End;
If m_library <> 0 Then
Begin
LOG('closing ddraw.dll');
FreeLibrary(m_library);
m_library := 0;
End;
End;
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