genode/repos/os/include/gui_session/connection.h
2023-03-13 14:32:37 +01:00

76 lines
1.9 KiB
C++

/*
* \brief Connection to GUI service
* \author Norman Feske
* \date 2008-08-22
*/
/*
* Copyright (C) 2008-2017 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU Affero General Public License version 3.
*/
#ifndef _INCLUDE__GUI_SESSION__CONNECTION_H_
#define _INCLUDE__GUI_SESSION__CONNECTION_H_
#include <gui_session/client.h>
#include <framebuffer_session/client.h>
#include <input_session/client.h>
#include <base/connection.h>
namespace Gui { class Connection; }
class Gui::Connection : public Genode::Connection<Session>,
public Session_client
{
private:
Framebuffer::Session_client _framebuffer;
Input::Session_client _input;
Genode::size_t _session_quota = 0;
public:
/**
* Constructor
*/
Connection(Genode::Env &env, Label const &label = Label())
:
/* establish nitpicker session */
Genode::Connection<Session>(env, label, Ram_quota { 36*1024 }, Args()),
Session_client(env.rm(), cap()),
/* request frame-buffer and input sub sessions */
_framebuffer(framebuffer_session()),
_input(env.rm(), input_session())
{ }
void buffer(Framebuffer::Mode mode, bool use_alpha) override
{
Genode::size_t const needed = ram_quota(mode, use_alpha);
Genode::size_t const upgrade = needed > _session_quota
? needed - _session_quota
: 0;
if (upgrade > 0) {
this->upgrade_ram(upgrade);
_session_quota += upgrade;
}
Session_client::buffer(mode, use_alpha);
}
/**
* Return sub session for GUI's input service
*/
Input::Session_client *input() { return &_input; }
/**
* Return sub session for session's frame buffer
*/
Framebuffer::Session *framebuffer() { return &_framebuffer; }
};
#endif /* _INCLUDE__GUI_SESSION__CONNECTION_H_ */