120 lines
3.2 KiB
C++
120 lines
3.2 KiB
C++
/*
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* \brief Nitpicker session interface
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* \author Norman Feske
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* \date 2006-08-10
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*
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* A Nitpicker session handles exactly one buffer.
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*/
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/*
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* Copyright (C) 2006-2013 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 General Public License version 2.
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*/
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#ifndef _INCLUDE__NITPICKER_SESSION__NITPICKER_SESSION_H_
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#define _INCLUDE__NITPICKER_SESSION__NITPICKER_SESSION_H_
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#include <session/session.h>
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#include <framebuffer_session/capability.h>
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#include <input_session/capability.h>
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#include <nitpicker_view/capability.h>
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namespace Nitpicker {
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using Genode::size_t;
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struct Session;
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}
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struct Nitpicker::Session : Genode::Session
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{
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static const char *service_name() { return "Nitpicker"; }
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/**
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* Exception type
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*/
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struct Out_of_metadata : Genode::Exception { };
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virtual ~Session() { }
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/**
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* Request framebuffer sub-session
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*/
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virtual Framebuffer::Session_capability framebuffer_session() = 0;
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/**
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* Request input sub-session
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*/
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virtual Input::Session_capability input_session() = 0;
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/**
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* Create a new view at the buffer
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*
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* \param parent parent view
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*
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* \return capability to a new view
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*
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* The 'parent' argument allows the client to use the location of an
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* existing view as the coordinate origin for the to-be-created view.
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* If an invalid capability is specified (default), the view will be a
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* top-level view.
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*/
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virtual View_capability create_view(View_capability parent = View_capability()) = 0;
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/**
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* Destroy view
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*/
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virtual void destroy_view(View_capability view) = 0;
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/**
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* Define view that is used as desktop background
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*/
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virtual int background(View_capability view) = 0;
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/**
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* Return physical screen mode
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*/
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virtual Framebuffer::Mode mode() = 0;
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/**
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* Define dimensions of virtual framebuffer
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*
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* \throw Out_of_metadata session quota does not suffice for specified
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* buffer dimensions
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*/
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virtual void buffer(Framebuffer::Mode mode, bool use_alpha) = 0;
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/**
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* Return number of bytes needed for virtual framebuffer of specified size
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*/
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static size_t ram_quota(Framebuffer::Mode mode, bool use_alpha)
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{
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/*
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* If alpha blending is used, each pixel requires an additional byte
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* for the alpha value and a byte holding the input mask.
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*/
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return (mode.bytes_per_pixel() + 2*use_alpha)*mode.width()*mode.height();
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}
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/*********************
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** RPC declaration **
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*********************/
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GENODE_RPC(Rpc_framebuffer_session, Framebuffer::Session_capability, framebuffer_session);
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GENODE_RPC(Rpc_input_session, Input::Session_capability, input_session);
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GENODE_RPC(Rpc_create_view, View_capability, create_view, View_capability);
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GENODE_RPC(Rpc_destroy_view, void, destroy_view, View_capability);
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GENODE_RPC(Rpc_background, int, background, View_capability);
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GENODE_RPC(Rpc_mode, Framebuffer::Mode, mode);
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GENODE_RPC_THROW(Rpc_buffer, void, buffer, GENODE_TYPE_LIST(Out_of_metadata),
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Framebuffer::Mode, bool);
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GENODE_RPC_INTERFACE(Rpc_framebuffer_session, Rpc_input_session,
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Rpc_create_view, Rpc_destroy_view, Rpc_background,
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Rpc_mode, Rpc_buffer);
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};
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#endif /* _INCLUDE__NITPICKER_SESSION__NITPICKER_SESSION_H_ */
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