/*
    QGLView
    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 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();
	void init(int width, int height);
	void resize(int width, int height);
	void reloadShaders();

protected:
	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, QOpenGLShaderProgram **> ShaderPair;

	int cplc, lights_per_pass;
	float exposure_;
	GLFramebuffer fbo_g, fbo_out, fbo_hsmall;
	QOpenGLShaderProgram *shader_fxaa, *shader_ds_0, *shader_ds_1, *shader_hdr, *shader_small;
	QOpenGLShaderProgram *shader_bloom_0, *shader_bloom_1, *shader_motion_blur, *shader_fbo_add;
	QOpenGLShaderProgram *shader_shadow, *shader_ssr, *shader_ssr_blur, *shader_ssr_merge;
	QOpenGLShaderProgram *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