/*
    QGL VertexObject
    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 GLVERTEXOBJECT_H
#define GLVERTEXOBJECT_H

#include "glbuffer.h"
#include "glshaders_types.h"


class VertexObject {
public:
	VertexObject();
	~VertexObject();

	void init(QOpenGLExtraFunctions * f);
	void destroy(QOpenGLExtraFunctions * f);
	void reinit();

	void bind(QOpenGLExtraFunctions * f);
	void release(QOpenGLExtraFunctions * f);

	void bindBuffers(QOpenGLExtraFunctions * f, Buffer & geom, Buffer & elem, bool force = false);
	void loadObject(QOpenGLExtraFunctions * f, const QGLEngineShaders::Object & object);
	void loadObjects(QOpenGLExtraFunctions * f, const QVector<QGLEngineShaders::Object> & objects);
	void loadSelections(QOpenGLExtraFunctions * f, const QVector<uchar> & sels);

	void draw(QOpenGLExtraFunctions * f, GLenum geom_type, int vert_cout, int obj_count);

	GLuint ID() const { return vao_; }
	bool isInit() const { return vao_ != 0; }

	bool isObjectsChanged() const { return objects_changed; }
	bool isSelectionChanged() const { return selected_changed; }
	void setObjectsChanged(bool yes = true) { objects_changed = yes; }
	void setSelectionChanged(bool yes = true) { selected_changed = yes; }

private:
	void loadBuffer(QOpenGLExtraFunctions * f, Buffer & buf, const void * data, int size);

	GLuint vao_;
	Buffer buffer_obj, buffer_sel;
	bool buffers_binded, objects_changed, selected_changed;
};


#endif // GLVERTEXOBJECT_H