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//==========================================================================

//

//      protocol.h

//

//      Data common to host and target.

//

//==========================================================================

// ####ECOSGPLCOPYRIGHTBEGIN####                                            

// -------------------------------------------                              

// This file is part of eCos, the Embedded Configurable Operating System.   

// Copyright (C) 2008 Free Software Foundation, Inc.                        

//

// eCos 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 or (at your option) any later      

// version.                                                                 

//

// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,    

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.            

//

// As a special exception, if other files instantiate templates or use      

// macros or inline functions from this file, or you compile this file      

// and link it with other works to produce a work based on this file,       

// this file does not by itself cause the resulting work to be covered by   

// the GNU General Public License. However the source code for this file    

// must still be made available in accordance with section (3) of the GNU   

// General Public License v2.                                               

//

// This exception does not invalidate any other reasons why a work based    

// on this file might be covered by the GNU General Public License.         

// -------------------------------------------                              

// ####ECOSGPLCOPYRIGHTEND####                                              

//==========================================================================

//###DESCRIPTIONBEGIN####

//

// Author(s):     bartv

// Date:          2005-10-28

//

//###DESCRIPTIONEND####

//========================================================================

// These requests are sent by eCos to the I/O auxiliary and the

// framebuf.tcl script.

//

// Protocol version number

#define SYNTH_FB_PROTOCOL_VERSION   0x01

// Initialize, getting back various file names.

#define SYNTH_FB_INIT               0x01

// Abort, failed to open the file names

#define SYNTH_FB_ABORT              0x02

// Switch a device back on.

#define SYNTH_FB_ON                 0x03

// Or off

#define SYNTH_FB_OFF                0x04

// These requests are sent by eCos to the host-side framebuf program

// to indicate what has changed.

//

// All connected

#define SYNTH_FB_OK                 0x01

// A double buffer synch.

#define SYNTH_FB_SYNC               0x02

// Palette change, redraw the lot

#define SYNTH_FB_WRITE_PALETTE      0x03

// Blank or unblank the screen

#define SYNTH_FB_BLANK              0x04

// Move the viewport

#define SYNTH_FB_VIEWPORT           0x05

// Page flipping

#define SYNTH_FB_PAGE_FLIP          0x06

// These requests go from the framebuf.tcl script to the framebuf

// program.

typedef struct synth_fb_auxiliary_request {

    unsigned int command;

    unsigned int arg1;

    unsigned int arg2;

} synth_fb_auxiliary_request;

// This is sent when the frame becomes visible. It is followed

// by a 32-bit windows id.

#define SYNTH_FB_AUX_MAPPED         0x01

// ON, processed by auxiliary and then passed on to framebuf

#define SYNTH_FB_AUX_ON             0x02

// OFF, processed by auxiliary and then passed on to framebuf

#define SYNTH_FB_AUX_OFF            0x03

// Refresh, sent by the auxiliary a second after mapping.

#define SYNTH_FB_AUX_REDRAW         0x04

// This data structure is in the shared memory region.

typedef struct synth_fb_data {

    // Do we have a connection to a host-side framebuf program to do

    // the drawing?

    int             connected;

    // Named fifo between framebuf and the synthetic target.

    int             fifo_to_framebuf;

    int             fifo_from_framebuf;

    // The device id for the auxiliary

    int             devid;

    // The bounding box for syncs.

    int             sync_x0;

    int             sync_y0;

    int             sync_x1;

    int             sync_y1;

    // Is the display on?

    int             display_on;

    // Current blank state

    int             blank_on;

    // Current viewport position, top left

    int             viewport_x;

    int             viewport_y;

    // Current page for page flipping

    int             page_visible;

    int             page_drawable;

    // The palette, if used.

    unsigned char   palette[3 * 256];

    // The framebuffer data follows.

    unsigned int    framebuf[1];

} synth_fb_data;