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115 lines
2.4 KiB
C++
115 lines
2.4 KiB
C++
/*
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* \brief Connection to capture service
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* \author Norman Feske
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* \date 2020-06-26
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*/
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/*
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* Copyright (C) 2020 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__CAPTURE_SESSION__CONNECTION_H_
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#define _INCLUDE__CAPTURE_SESSION__CONNECTION_H_
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#include <capture_session/client.h>
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#include <base/connection.h>
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#include <base/attached_dataspace.h>
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#include <os/texture.h>
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#include <blit/painter.h>
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namespace Capture { class Connection; }
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class Capture::Connection : public Genode::Connection<Session>,
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public Session_client
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{
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public:
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enum { RAM_QUOTA = 36*1024UL };
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private:
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size_t _session_quota = 0;
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public:
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/**
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* Constructor
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*/
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Connection(Genode::Env &env, char const *label = "")
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:
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Genode::Connection<Capture::Session>(
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env, session(env.parent(),
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"ram_quota=%u, cap_quota=%u, label=\"%s\"",
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RAM_QUOTA, CAP_QUOTA, label)),
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Session_client(cap())
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{ }
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void buffer(Area size) override
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{
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size_t const needed = buffer_bytes(size);
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size_t const upgrade = needed > _session_quota
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? needed - _session_quota
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: 0;
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if (upgrade > 0) {
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this->upgrade_ram(upgrade);
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_session_quota += upgrade;
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}
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Session_client::buffer(size);
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}
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struct Screen;
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};
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class Capture::Connection::Screen
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{
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public:
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Area const size;
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private:
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Capture::Connection &_connection;
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bool const _buffer_initialized = ( _connection.buffer(size), true );
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Attached_dataspace _ds;
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Texture<Pixel> const _texture { _ds.local_addr<Pixel>(), nullptr, size };
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public:
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Screen(Capture::Connection &connection, Region_map &rm, Area size)
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:
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size(size), _connection(connection), _ds(rm, _connection.dataspace())
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{ }
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template <typename FN>
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void with_texture(FN const &fn) const
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{
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fn(_texture);
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}
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void apply_to_surface(Surface<Pixel> &surface)
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{
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Affected_rects const affected = _connection.capture_at(Capture::Point(0, 0));
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with_texture([&] (Texture<Pixel> const &texture) {
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affected.for_each_rect([&] (Capture::Rect const rect) {
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surface.clip(rect);
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Blit_painter::paint(surface, texture, Capture::Point(0, 0));
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});
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});
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}
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};
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#endif /* _INCLUDE__CAPTURE_SESSION__CONNECTION_H_ */
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