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/*
Copyright (C) 2025 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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 2 of the License, or
(at your option) any later version.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "lib/exception_store.h"
#include <dcp/warnings.h>
LIBDCP_DISABLE_WARNINGS
#include <wx/glcanvas.h>
#include <wx/wx.h>
LIBDCP_ENABLE_WARNINGS
#include <boost/atomic.hpp>
#include <boost/thread.hpp>
#include <boost/thread/condition.hpp>
/* The OpenGL API in wxWidgets 3.0.x is sufficiently different to make it awkward to support,
* and I think it may even have things missing that we require (e.g. the attributes parameter
* to wxGLContext). Hence we only support the GLView on wxWidgets 3.1.0 and higher
* (which only excludes the old macOS builds, since wxWidgets 3.1.x does not support macOS
* 10.9 or earlier).
*/
#if wxCHECK_VERSION(3,1,0)
class GLView : public ExceptionStore
{
public:
GLView(wxWindow* parent);
virtual ~GLView();
virtual void update();
wxWindow* canvas() const {
return _canvas;
}
bool vsync_enabled() const {
return _vsync_enabled;
}
protected:
virtual void size_changed(wxSizeEvent const& ev);
virtual void thread_setup() = 0;
virtual void draw() = 0;
virtual void thread_playing() = 0;
virtual boost::optional<int> time_until_next_frame() const = 0;
void start_thread_if_required();
void start();
void stop();
void request_one_shot();
void ensure_context();
wxGLCanvas* _canvas;
boost::atomic<wxSize> _canvas_size;
wxGLContext* _context;
private:
void thread();
boost::thread _thread;
bool _vsync_enabled;
boost::mutex _playing_mutex;
boost::condition _thread_work_condition;
boost::atomic<bool> _playing;
boost::atomic<bool> _one_shot;
};
#endif
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