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{* UltraStar Deluxe - Karaoke Game
*
* UltraStar Deluxe is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* $URL: https://ultrastardx.svn.sourceforge.net/svnroot/ultrastardx/trunk/src/base/UMain.pas $
* $Id: UMain.pas 1629 2009-03-07 22:30:04Z k-m_schindler $
*}
unit UPluginLoader_DLL;
interface
{$IFDEF FPC}
{$MODE Delphi}
{$ENDIF}
{$I switches.inc}
uses UPluginDefines, UPlugin;
type
TPluginLoader_DLL = class
protected
PluginDir: WideString;
public
constructor Create(PluginDir: WideString);
procedure Browse(Dir: WideString);
end;
TPlugin_DLL = class (TPlugin)
protected
hLib: THandle; //< handle of loaded library
Lib_Proc_Init: TUS_Plugin_Proc_Init;
Lib_OnChangeStatus: TUS_Plugin_OnChangeStatus;
procedure OnChangeStatus(Status: TUS_PluginStatus); override;
public
constructor Create(Handle: TUS_Handle; Filename: WideString); override;
destructor Destroy; override;
end;
const
{$IF Defined(MSWINDOWS)}
DLLExt = '.dll';
{$ELSEIF Defined(DARWIN)}
DLLExt = '.dylib';
{$ELSEIF Defined(UNIX)}
DLLExt = '.so';
{$IFEND}
implementation
uses
{$IFDEF MSWINDOWS}
windows,
{$ELSE}
dynlibs,
{$ENDIF}
SysUtils, Dialogs,
UPluginManager,
UPlatform;
{ implementation of TPluginLoader_DLL }
constructor TPluginLoader_DLL.Create(PluginDir: WideString);
begin
Self.PluginDir := PluginDir;
Browse(PluginDir);
end;
procedure TPluginLoader_DLL.Browse(Dir: WideString);
var
Files: TDirectoryEntryArray;
I: Integer;
begin
Showmessage(Dir + ' - ' + DLLExt);
Files := Platform.DirectoryFindFiles(Dir, DLLExt, True);
for I := 0 to High(Files) do
begin
ShowMessage(Dir + Files[I].Name);
if (Files[I].IsDirectory) then
Browse(Dir + Files[I].Name + PathDelim)
else if (Files[I].IsFile) then
PluginManager.AddPlugin(TPlugin_DLL.Create(PluginManager.GetHandle, Dir + Files[I].Name));
end;
end;
{ implementation of TPlugin_DLL }
constructor TPlugin_DLL.Create(Handle: TUS_Handle; Filename: WideString);
begin
inherited;
hLib := 0;
Lib_Proc_Init := nil;
Lib_OnChangeStatus := nil;
//try to load the library
SetStatus(psWaitingInit);
end;
destructor TPlugin_DLL.Destroy;
begin
inherited;
end;
procedure TPlugin_DLL.OnChangeStatus(Status: TUS_PluginStatus);
begin
Case Status of
psWaitingInit: begin
//we have to try to load the plugin here
hLib := LoadLibrary(PChar(AnsiString(Filename)));
if (hlib <> 0) then
begin
@Lib_Proc_Init := GetProcAddress(hLib, PChar('Proc_Init'));
If (not Assigned(Lib_Proc_Init)) then
begin
FreeLibrary(hLib);
{$IFDEF MSWINDOWS}
SetError('Can''t export Proc_Init procedure from library. Windows reports: ' + SysErrorMessage(GetLastError));
{$ELSE}
SetError('Can''t export Proc_Init procedure from library.');
{$ENDIF}
Exit;
end;
@Lib_OnChangeStatus := GetProcAddress(hLib, PChar('OnChangeStatus'));
If (not Assigned(Lib_OnChangeStatus)) then
begin
FreeLibrary(hLib);
{$IFDEF MSWINDOWS}
SetError('Can''t export OnChangeStatus procedure from library. Windows reports: ' + SysErrorMessage(GetLastError));
{$ELSE}
SetError('Can''t export OnChangeStatus procedure from library.');
{$ENDIF}
Exit;
end;
end
else
begin
{$IFDEF MSWINDOWS}
SetError('Error loading library. Windows reports: ' + SysErrorMessage(GetLastError));
{$ELSE}
SetError('Error loading library.');
{$ENDIF}
Exit;
end;
end;
end;
//call plugins OnChangeStatus procedure
If assigned(Lib_OnChangeStatus) then
Lib_OnChangeStatus(Self.Handle, Status);
Self.Status := Status;
end;
end.
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