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/*
Copyright (C) 2020 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 "gl_util.h"
#include "lib/crop.h"
#include <dcp/warnings.h>
LIBDCP_DISABLE_WARNINGS
#include <wx/glcanvas.h>
#include <wx/wx.h>
LIBDCP_ENABLE_WARNINGS
#undef None
#undef Success
#undef Status
/* 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 GLVideoView 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)
#include "video_view.h"
#include "lib/signaller.h"
#include "lib/position.h"
#include <dcp/util.h>
#include <boost/atomic.hpp>
#include <boost/thread.hpp>
#include <boost/thread/condition.hpp>
class Texture
{
public:
Texture(GLint unpack_alignment, int unit = 0);
~Texture();
Texture(Texture const&) = delete;
Texture& operator=(Texture const&) = delete;
void bind();
void set(std::shared_ptr<const Image> image, int component = 0);
private:
GLuint _name;
GLint _unpack_alignment;
int _unit;
boost::optional<dcp::Size> _size;
};
class GLVideoView : public VideoView
{
public:
GLVideoView(FilmViewer* viewer, wxWindow* parent, bool wake);
~GLVideoView();
wxWindow* get() const override {
return _canvas;
}
void update() override;
void start() override;
void stop() override;
NextFrameResult display_next_frame(bool) override;
bool vsync_enabled() const {
return _vsync_enabled;
}
std::map<GLenum, std::string> information() const {
return _information;
}
private:
void set_image(std::shared_ptr<const PlayerVideo> pv);
void set_image_and_draw();
void draw();
void thread();
void thread_playing();
void request_one_shot();
void check_for_butler_errors();
void ensure_context();
void size_changed(wxSizeEvent const &);
void setup_shaders();
void set_outline_content_colour(GLuint program);
void set_crop_guess_colour(GLuint program);
wxGLCanvas* _canvas;
wxGLContext* _context;
template <class T>
class Last
{
public:
void set_next(T const& next) {
_next = next;
}
bool changed() const {
return !_value || *_value != _next;
}
void update() {
_value = _next;
}
private:
boost::optional<T> _value;
T _next;
};
Last<wxSize> _last_canvas_size;
Last<dcp::Size> _last_video_size;
Last<Position<int>> _last_inter_position;
Last<dcp::Size> _last_inter_size;
Last<dcp::Size> _last_out_size;
Last<Crop> _last_crop;
Last<boost::optional<dcpomatic::Rect<float>>> _last_crop_guess;
boost::atomic<wxSize> _canvas_size;
boost::atomic<bool> _rec2020;
std::vector<std::unique_ptr<Texture>> _video_textures;
std::unique_ptr<Texture> _subtitle_texture;
bool _have_subtitle_to_render = false;
bool _vsync_enabled;
boost::thread _thread;
boost::mutex _playing_mutex;
boost::condition _thread_work_condition;
boost::atomic<bool> _playing;
boost::atomic<bool> _one_shot;
GLuint _vao;
dcpomatic::gl::Uniform1i _fragment_type;
bool _setup_shaders_done = false;
std::shared_ptr<wxTimer> _timer;
std::map<GLenum, std::string> _information;
};
#endif
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