/**

 * $Id$

 *

 * Implementation of the standard mouse device

 *

 * Copyright (c) 2005 Nathan Keynes.

 *

 * This program 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.

 *

 * This program 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.

 */

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include "display.h"

#include "maple/maple.h"

#define MOUSE_IDENT     { 0x00, 0x00, 0x02, 0x00,  0x02, 0x00, 0x07, 0x00,  0x00, 0x00, 0x00, 0x00,\

    0x00, 0x00, 0x00, 0x00,  0xff, 0x00, 0x44, 0x72,  0x65, 0x61, 0x6d, 0x63,  0x61, 0x73, 0x74, 0x20,\

    0x4d, 0x6f, 0x75, 0x73,  0x65, 0x20, 0x20, 0x20,  0x20, 0x20, 0x20, 0x20,  0x20, 0x20, 0x20, 0x20,\

    0x20, 0x20, 0x20, 0x20,  0x50, 0x72, 0x6f, 0x64,  0x75, 0x63, 0x65, 0x64,  0x20, 0x42, 0x79, 0x20,\

    0x6f, 0x72, 0x20, 0x55,  0x6e, 0x64, 0x65, 0x72,  0x20, 0x4c, 0x69, 0x63,  0x65, 0x6e, 0x73, 0x65,\

    0x20, 0x46, 0x72, 0x6f,  0x6d, 0x20, 0x53, 0x45,  0x47, 0x41, 0x20, 0x45,  0x4e, 0x54, 0x45, 0x52,\

    0x50, 0x52, 0x49, 0x53,  0x45, 0x53, 0x2c, 0x4c,  0x54, 0x44, 0x2e, 0x20,  0x20, 0x20, 0x20, 0x20,\

    0x90, 0x01, 0xf4, 0x01 }

#define MOUSE_VERSION   { 0x56, 0x65, 0x72, 0x73,  0x69, 0x6f, 0x6e, 0x20,  0x31, 0x2e, 0x30, 0x30,\

    0x30, 0x2c, 0x32, 0x30,  0x30, 0x30, 0x2f, 0x30,  0x32, 0x2f, 0x32, 0x35,  0x2c, 0x33, 0x31, 0x35,\

    0x2d, 0x36, 0x32, 0x31,  0x31, 0x2d, 0x41, 0x54,  0x20, 0x20, 0x20, 0x2c,  0x33, 0x20, 0x42, 0x75,\

    0x74, 0x74, 0x6f, 0x6e,  0x20, 0x26, 0x20, 0x58,  0x2d, 0x59, 0x20, 0x42,  0x61, 0x6c, 0x6c, 0x20,\

    0x26, 0x20, 0x5a, 0x20,  0x57, 0x68, 0x65, 0x65,  0x6c, 0x20, 0x2c, 0x34,  0x30, 0x30, 0x64, 0x70,\

    0x69, 0x20, 0x20, 0x20 }

#define BUTTON_MIDDLE 0x01

#define BUTTON_RIGHT  0x02

#define BUTTON_LEFT   0x04

#define BUTTON_THUMB  0x08

void mouse_attach( maple_device_t dev );

void mouse_detach( maple_device_t dev );

maple_device_t mouse_clone( maple_device_t dev );

maple_device_t mouse_new();

int mouse_get_cond( maple_device_t dev, int function, unsigned char *outbuf,

                    unsigned int *outlen );

typedef struct mouse_device {

    struct maple_device dev;

    uint32_t buttons;

    int32_t axis[8];

} *mouse_device_t; 

struct maple_device_class mouse_class = { "Sega Mouse", mouse_new };

static struct mouse_device base_mouse = {

        { MAPLE_DEVICE_TAG, &mouse_class, MAPLE_GRAB_YES,

                MOUSE_IDENT, MOUSE_VERSION, 

                NULL, NULL, mouse_attach, mouse_detach, maple_default_destroy,

                mouse_clone, NULL, NULL, mouse_get_cond, NULL, NULL, NULL },

                0, {0,0,0,0,0,0,0,0}, 

};

static int32_t mouse_axis_scale_factors[8] = { 10, 10, 1, 1, 1, 1, 1, 1 };

#define MOUSE(x) ((mouse_device_t)(x))

maple_device_t mouse_new( )

{

    mouse_device_t dev = malloc( sizeof(struct mouse_device) );

    memcpy( dev, &base_mouse, sizeof(base_mouse) );

    return MAPLE_DEVICE(dev);

}

maple_device_t mouse_clone( maple_device_t srcdevice )

{

    mouse_device_t src = (mouse_device_t)srcdevice;

    mouse_device_t dev = (mouse_device_t)mouse_new();

    dev->buttons = src->buttons;

    memcpy( dev->axis, src->axis, sizeof(src->axis) );

    return MAPLE_DEVICE(dev);

}

void mouse_input_callback( void *mdev, uint32_t buttons, int32_t x, int32_t y )

{

    mouse_device_t dev = (mouse_device_t)mdev;

    dev->buttons = 0xFF;

    if( buttons & 0x01 ) {

        dev->buttons &= ~BUTTON_LEFT;

    }

    if( buttons & 0x02 ) {

        dev->buttons &= ~BUTTON_MIDDLE;

    } 

    if( buttons & 0x04 ) {

        dev->buttons &= ~BUTTON_RIGHT;

    }

    if( buttons & 0x08 ) {

        dev->buttons &= ~BUTTON_THUMB;

    }

    dev->axis[0] += x;

    dev->axis[1] += y;

}

void mouse_attach( maple_device_t dev )

{

    input_register_mouse_hook( TRUE, mouse_input_callback, dev );

}

void mouse_detach( maple_device_t dev )

{

    input_unregister_mouse_hook( mouse_input_callback, dev );

}

int mouse_get_cond( maple_device_t mdev, int function, unsigned char *outbuf,

                    unsigned int *outlen )

{

    mouse_device_t dev = (mouse_device_t)mdev;

    if( function == MAPLE_FUNC_MOUSE ) {

        *outlen = 5;

        *(uint32_t *)outbuf = dev->buttons;

        uint16_t *p = (uint16_t *)(outbuf+4);

        int i;

        // Axis values are in the range 0..0x3FF, where 0x200 is zero movement

        for( i=0; i<8; i++ ) {

            int32_t value = dev->axis[i] / mouse_axis_scale_factors[i];

            if( value < -0x200 ) {

                p[i] = 0;

            } else if( value > 0x1FF ) {

                p[i] = 0x3FF;

            } else {

                p[i] = 0x200 + value;

            }

            dev->axis[i] = 0; // clear after returning.

        }

        return 0;

    } else {

        return MAPLE_ERR_FUNC_UNSUP;

    }

}