/* -*- c++ -*-
 * Copyright ©2008 Hugo Mills <hugo@carfax.org.uk>
 *
 * This software is distributed under the terms of the GNU GPL v3
 * For more information on the GPL, see the file COPYING or 
 * visit http://www.gnu.org/
 *
 * This software is distributed without warranty
 */

#include "rendercontextstacked.h"

RenderContextStacked::RenderContextStacked(RenderContext* c)
	: RenderContext(-1, c->getdisplay(), c->getviewport())
{
	stack.push_back(c);
}

RenderContextStacked::~RenderContextStacked()
{
	for(std::list<RenderContext*>::iterator it = stack.begin();
		it != stack.end();
		it++)
	{
		delete *it;
	}
}

void RenderContextStacked::render(Output* where) const
{
	for(std::list<RenderContext*>::const_iterator it = stack.begin();
		it != stack.end();
		it++)
	{
		(*it)->render(where);
	}
}

void RenderContextStacked::halve(RenderContext** B0, RenderContext** B1) const
{
	RenderContextStacked* t0;
	RenderContextStacked* t1;
	t0 = new RenderContextStacked();
	t1 = new RenderContextStacked();

	for(std::list<RenderContext*>::const_iterator it = stack.begin();
		it != stack.end();
		it++)
	{
		RenderContext* c0;
		RenderContext* c1;

		(*it)->halve(&c0, &c1);
		t0->stack.push_back(c0);
		t1->stack.push_back(c1);
	}

	*B0 = t0;
	*B1 = t1;
}