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{
Free Pascal port of the OpenPTC C++ library.
Copyright (C) 2001-2003, 2006, 2007, 2009-2011 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
with the following modification:
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent modules,and
to copy and distribute the resulting executable under terms of your choice,
provided that you also meet, for each linked independent module, the terms
and conditions of the license of that module. An independent module is a
module which is not derived from or based on this library. If you modify
this library, you may extend this exception to your version of the library,
but you are not obligated to do so. If you do not wish to do so, delete this
exception statement from your 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
}
type
TPTCPalette = class(TInterfacedObject, IPTCPalette)
private
FLocked: Boolean;
FHandle: THermesPaletteHandle;
public
constructor Create;
constructor Create(const AData: array of Uint32);
constructor Create(APalette: IPTCPalette);
destructor Destroy; override;
// procedure Assign(const APalette: TPTCPalette);
// function Equals(const APalette: TPTCPalette): Boolean;
function Lock: PUint32;
procedure Unlock;
procedure Load(const AData: array of Uint32);
procedure Load(AData: Pointer);
procedure Save(var AData: array of Uint32);
procedure Save(AData: Pointer);
function Data: PUint32;
function GetHermesPaletteHandle: THermesPaletteHandle;
end;
class function TPTCPaletteFactory.CreateNew: IPTCPalette;
begin
Result := TPTCPalette.Create;
end;
class function TPTCPaletteFactory.CreateNew(const AData: array of Uint32): IPTCPalette;
begin
Result := TPTCPalette.Create(AData);
end;
class function TPTCPaletteFactory.CreateNew(APalette: IPTCPalette): IPTCPalette;
begin
Result := TPTCPalette.Create(APalette);
end;
constructor TPTCPalette.Create;
var
zero: array [0..255] of Uint32;
begin
FLocked := False;
if not Hermes_Init then
raise TPTCError.Create('could not initialize hermes');
FHandle := Hermes_PaletteInstance;
if FHandle = nil then
raise TPTCError.Create('could not create hermes palette instance');
FillChar(zero, SizeOf(zero), 0);
Load(zero);
end;
constructor TPTCPalette.Create(const AData: array of Uint32);
begin
FLocked := False;
if not Hermes_Init then
raise TPTCError.Create('could not initialize hermes');
FHandle := Hermes_PaletteInstance;
if FHandle = nil then
raise TPTCError.Create('could not create hermes palette instance');
Load(AData);
end;
constructor TPTCPalette.Create(APalette: IPTCPalette);
begin
FLocked := False;
if not Hermes_Init then
raise TPTCError.Create('could not initialize hermes');
FHandle := Hermes_PaletteInstance;
if FHandle = nil then
raise TPTCError.Create('could not create hermes palette instance');
Hermes_PaletteSet(FHandle, Hermes_PaletteGet(APalette.GetHermesPaletteHandle));
end;
destructor TPTCPalette.Destroy;
begin
if FLocked then
raise TPTCError.Create('palette is still locked');
Hermes_PaletteReturn(FHandle);
Hermes_Done;
inherited Destroy;
end;
{procedure TPTCPalette.Assign(const APalette: TPTCPalette);
begin
if Self = APalette then
exit;
Hermes_PaletteSet(FHandle, Hermes_PaletteGet(APalette.FHandle));
end;
function TPTCPalette.Equals(const APalette: TPTCPalette): Boolean;
begin
Equals := CompareDWord(Hermes_PaletteGet(FHandle)^, Hermes_PaletteGet(APalette.FHandle)^, 1024 div 4) = 0;
end;
}
function TPTCPalette.Lock: PUint32;
begin
if FLocked then
raise TPTCError.Create('palette is already locked');
FLocked := True;
Result := Hermes_PaletteGet(FHandle);
end;
procedure TPTCPalette.Unlock;
begin
if not FLocked then
raise TPTCError.Create('palette is not locked');
FLocked := False;
end;
procedure TPTCPalette.Load(const AData: array of Uint32);
begin
Hermes_PaletteSet(FHandle, @AData);
end;
procedure TPTCPalette.Load(AData: Pointer);
begin
Hermes_PaletteSet(FHandle, AData);
end;
procedure TPTCPalette.Save(var AData: array of Uint32);
begin
Move(Hermes_PaletteGet(FHandle)^, AData, 1024);
end;
procedure TPTCPalette.Save(AData: Pointer);
begin
Move(Hermes_PaletteGet(FHandle)^, AData^, 1024);
end;
function TPTCPalette.Data: PUint32;
begin
Result := Hermes_PaletteGet(FHandle);
end;
function TPTCPalette.GetHermesPaletteHandle: THermesPaletteHandle;
begin
Result := FHandle;
end;
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