/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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 3 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.  If not, see <http://www.gnu.org/licenses/>.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/

#include "hsTypes.h"

#include "plFadeOpacityLay.h"

plFadeOpacityLay::plFadeOpacityLay()
:	fOpScale(1.f)
{
	fOwnedChannels |= kOpacity;
	fOpacity = TRACKED_NEW hsScalar;
}

plFadeOpacityLay::~plFadeOpacityLay()
{
}

UInt32 plFadeOpacityLay::Eval(double secs, UInt32 frame, UInt32 ignore)
{
	UInt32 ret = plLayerInterface::Eval(secs, frame, ignore);

	if( fUnderLay )
	{
		if( GetBlendFlags() & hsGMatState::kBlendAdd )
		{
			*fRuntimeColor = fUnderLay->GetRuntimeColor() * fOpScale;
		}
		else
		{
			*fOpacity = fUnderLay->GetOpacity() * fOpScale;
		}
	}

	return ret;
}

void plFadeOpacityLay::Read(hsStream* s, hsResMgr* mgr)
{
	plLayerInterface::Read(s, mgr);

	fOpScale = s->ReadSwapScalar();
}

void plFadeOpacityLay::Write(hsStream* s, hsResMgr* mgr)
{
	plLayerInterface::Write(s, mgr);

	s->WriteSwapScalar(fOpScale);
}