/*
	QGL GLRendererBase
	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 GLRENDERERBASE_H
#define GLRENDERERBASE_H

#include "glcamera.h"
#include "glshaders.h"


class GLRendererBase: public QObject , protected QOpenGLExtraFunctions
{
	friend class QGLView;
	Q_OBJECT
public:
	GLRendererBase(QGLView * view_);
	virtual void prepareScene() {;}
	virtual void renderScene() = 0;

	struct RenderingParameters {
		RenderingParameters();
		void prepare();
		void setUniform(QOpenGLShaderProgram * prog);
		QMatrix4x4 view_matrix, view_matrix_i;
		QMatrix4x4 proj_matrix, proj_matrix_i;
		QMatrix4x4 viewproj_matrix, viewproj_matrix_i;
		QMatrix3x3 normal_matrix;
	};

	RenderingParameters rp;

protected:
	virtual void setupLight(const Light & l, int inpass_index, int gl_index);
	virtual void setupAmbientLight(const QColor & a, bool first_pass);
	virtual void setupShadersLights(int lights_count) {}
	virtual void setupTextures(ObjectBase & object, GLRendererBase::RenderingParameters & rp, bool first_object = false);
	virtual void setupShadersTextures(ObjectBase & object, GLRendererBase::RenderingParameters & rp) {}
	virtual void reloadShaders() {}
	virtual void init(int width, int height) {}
	virtual void resize(int width, int height) {}

	inline void applyFilteringParameters();

	QGLView * view;
	QImage white_image, violent_image;
	GLuint white_image_id, violent_image_id;
};

#endif // GLRENDERERBASE_H