/**

 * $Id: display.c,v 1.12 2007-10-31 09:10:23 nkeynes Exp $

 *

 * Generic support for keyboard and other input sources. The active display

 * driver is expected to deliver events here, where they're translated and

 * passed to the appropriate dreamcast controllers (if any).

 *

 * 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 <stdint.h>

#include <assert.h>

#include "dream.h"

#include "display.h"

#include "pvr2/pvr2.h"

typedef struct keymap_entry {

    uint16_t keycode;

    input_key_callback_t callback;

    void *data;

    uint32_t value;

} *keymap_entry_t;

/**

 * Colour format information

 */

struct colour_format colour_formats[] = {

    { GL_UNSIGNED_SHORT_1_5_5_5_REV, GL_BGRA, GL_RGB5_A1, 2 },

    { GL_UNSIGNED_SHORT_5_6_5, GL_RGB, GL_RGB5, 2 },

    { GL_UNSIGNED_SHORT_4_4_4_4_REV, GL_BGRA, GL_RGBA4, 2 },

    { GL_UNSIGNED_BYTE, GL_BGRA, GL_RGBA8, 4 }, /* YUV decoded to ARGB8888 */

    { GL_UNSIGNED_BYTE, GL_BGR, GL_RGB, 3 },

    { GL_UNSIGNED_BYTE, GL_BGRA, GL_RGBA8, 4 },

    { GL_UNSIGNED_BYTE, GL_BGRA, GL_RGBA8, 4 }, /* Index4 decoded */

    { GL_UNSIGNED_BYTE, GL_BGRA, GL_RGBA8, 4 }, /* Index8 decoded */

    { GL_UNSIGNED_BYTE, GL_BGRA, GL_RGBA8, 4 },

    { GL_UNSIGNED_BYTE, GL_RGB, GL_RGB, 3 },

};

/**

 * FIXME: make this more memory efficient

 */

struct keymap_entry *keymap[65536];

static struct keymap_entry *input_create_key( uint16_t keycode )

{

    struct keymap_entry *key = keymap[ keycode ];

    if( key == NULL ) {

	key = malloc( sizeof( struct keymap_entry ) );

	assert( key != NULL );

	keymap[ keycode ] = key;

	key->keycode = keycode;

    }

    return key;

}

static void input_delete_key( uint16_t keycode, input_key_callback_t callback, void *data,

			      uint32_t value )

{

    struct keymap_entry *key = keymap[keycode];

    if( key != NULL && key->callback == callback && key->data == data && key->value == value ) {

	free( key );

	keymap[keycode] = NULL;

    }

}

static struct keymap_entry *input_get_key( uint16_t keycode )

{

    return keymap[ keycode ];

}

gboolean input_register_key( const gchar *keysym, input_key_callback_t callback,

			     void *data, uint32_t value )

{

    if( display_driver == NULL || keysym == NULL || display_driver->resolve_keysym == NULL )

	return FALSE; /* No display driver */

    gchar **strv = g_strsplit(keysym, ",", 16);

    gchar **s = strv;

    while( *s != NULL ) {

	uint16_t keycode = display_driver->resolve_keysym(g_strstrip(*s));

	if( keycode == 0 )

	    return FALSE; /* Invalid keysym */

	struct keymap_entry *key = input_create_key( keycode );

	key->callback = callback;

	key->data = data;

	key->value = value;

	s++;

    }

    g_strfreev(strv);

    return TRUE;

}

void input_unregister_key( const gchar *keysym, input_key_callback_t callback,

			   void *data, uint32_t value )

{

    if( display_driver == NULL || keysym == NULL )

	return;

    uint16_t keycode = display_driver->resolve_keysym(keysym);

    if( keycode == 0 )

	return;

    input_delete_key( keycode, callback, data, value );

}

gboolean input_is_key_valid( const gchar *keysym )

{

    if( display_driver == NULL )

	return FALSE; /* No display driver */

    return display_driver->resolve_keysym(keysym) != 0;

}

gboolean input_is_key_registered( const gchar *keysym )

{

    if( display_driver == NULL )

	return FALSE;

    uint16_t keycode = display_driver->resolve_keysym(keysym);

    if( keycode == 0 )

	return FALSE;

    return input_get_key( keycode ) != NULL;

}

void input_event_keydown( uint16_t keycode )

{

    struct keymap_entry *key = input_get_key(keycode);

    if( key != NULL ) {

	key->callback( key->data, key->value, TRUE );

    }	

}

void input_event_keyup( uint16_t keycode )

{

    struct keymap_entry *key = input_get_key(keycode);

    if( key != NULL ) {

	key->callback( key->data, key->value, FALSE );

    }

}

gboolean display_set_driver( display_driver_t driver )

{

    gboolean rv = TRUE;

    if( display_driver != NULL && display_driver->shutdown_driver != NULL ) 

	display_driver->shutdown_driver();

    display_driver = driver;

    if( driver->init_driver != NULL )

	rv = driver->init_driver();

    if( rv ) {

	texcache_gl_init();

    }

    return rv;

}