/*
    QGLView
    Copyright (C) 2012  Ivan Pelipenko peri4ko@gmail.com

    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/>.
*/

#ifndef RENDERER_DEFERRED_SHADING_H
#define RENDERER_DEFERRED_SHADING_H

#include "qglview.h"
#include <QLabel>

class RendererDeferredShading: public GLRendererBase
{
public:
	RendererDeferredShading(QGLView * view);
	virtual ~RendererDeferredShading();

	virtual void renderScene();

protected:
	void init(int width, int height);
	void resize(int width, int height);
	void reloadShaders();
	void setupShadersTextures(GLObjectBase & object, RenderingParameters & rp);
	void setupShadersLights(int lights_count) {cplc = lights_count;}
	void setupDSLights(int pass, const QMatrix4x4 & view_matrix);
	void setupAmbientLight(const QColor & a, bool first_pass);

private:
	typedef QPair<QString, QGLShaderProgram **> ShaderPair;

	int cplc, lights_per_pass;
	double exposure_;
	GLFramebuffer fbo_g, fbo_out, fbo_hsmall;
	QGLShaderProgram * shader_fxaa, * shader_ds_0, * shader_ds_1, * shader_hdr, * shader_small;
	QGLShaderProgram * shader_bloom_0, * shader_bloom_1, * shader_motion_blur, * shader_fbo_add;
	QGLShaderProgram * shader_shadow, * shader_ssr, * shader_ssr_blur, * shader_ssr_merge;
	QGLShaderProgram * shader_ssao_blur, * shader_ssao_merge, * shader_dof;
	GLuint tnoise;
	QVector<ShaderPair> shaders;

	QMatrix4x4 prev_view, prev_proj;
	QMatrix3x3 nm;
	QVector4D corner_dirs[4];
	QVector<Vector3d> hcontent;
	Light amb_light;

	QWidget * df;
	QLabel * label_exp, * label_exp_step;

};

#endif // RENDERER_DEFERRED_SHADING_H