/***

    Olive - Non-Linear Video Editor
    Copyright (C) 2019  Olive Team

    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 RENDERTHREAD_H
#define RENDERTHREAD_H

#include <QThread>
#include <QMutex>
#include <QWaitCondition>
#include <QOffscreenSurface>
#include <QOpenGLContext>
#include <QOpenGLFramebufferObject>
#include <QOpenGLShaderProgram>

struct Sequence;
class Effect;

class RenderThread : public QThread {
	Q_OBJECT
public:
	RenderThread();
	~RenderThread();
	void run();
	QMutex mutex;
	GLuint front_buffer;
	GLuint front_texture;
	Effect* gizmos;
	void paint();
    void start_render(QOpenGLContext* share, Sequence* s, const QString &save = nullptr, GLvoid *pixels = nullptr, int pixel_linesize = 0, int idivider = 0);
	bool did_texture_fail();
	void cancel();

public slots:
	// cleanup functions
	void delete_ctx();
signals:
	void ready();
private:
	// cleanup functions
	void delete_texture();
	void delete_fbo();
	void delete_shader_program();

	QWaitCondition waitCond;
	QOffscreenSurface surface;
	QOpenGLContext* share_ctx;
	QOpenGLContext* ctx;
	QOpenGLShaderProgram* blend_mode_program;
	QOpenGLShaderProgram* premultiply_program;

	GLuint back_buffer_1;
	GLuint back_buffer_2;
	GLuint back_texture_1;
	GLuint back_texture_2;

	Sequence* seq;
	int divider;
	int tex_width;
	int tex_height;
	bool queued;
	bool texture_failed;
	bool running;
	QString save_fn;
	GLvoid *pixel_buffer;
    int pixel_buffer_linesize;
};

#endif // RENDERTHREAD_H