/*
	QGL FramebufferMipmap
	Ivan Pelipenko peri4ko@yandex.ru

	This program 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 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 Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef GLFRAMEBUFFER_MIPMAP_H
#define GLFRAMEBUFFER_MIPMAP_H

#include "glframebuffer.h"


class FramebufferMipmap
{
public:
	FramebufferMipmap(const Framebuffer & fb, int index_from_, int levels = 2);
	virtual ~FramebufferMipmap();

	int levelsCount() const {return fbo.size();}
	int lastLevel() const {return fbo.size() - 1;}
	Framebuffer & plane(int level) {return *fbo[level];}
	Framebuffer & lastPlane() {return *fbo[lastLevel()];}
	int width (int level) const {return fbo[level]->wid;}
	int height(int level) const {return fbo[level]->hei;}
	QSize size(int level) const {return fbo[level]->size();}
	QRect rect(int level) const {return fbo[level]->rect();}

	void resize();
	void create();

private:
	int index_from;
	const Framebuffer & src_fb;
	QVector<Framebuffer*> fbo;

};

#endif // GLFRAMEBUFFER_MIPMAP_H