/**

  * $Id: display.c,v 1.2 2006-06-18 12:01:50 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"

 typedef struct keymap_entry {

     uint16_t keycode;

     input_key_callback_t callback;

     void *data;

     uint32_t value;

 } *keymap_entry_t;

 /**

  * 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 )

 {

     struct keymap_entry *key = keymap[keycode];

     if( key != NULL ) {

 	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 )

 	return FALSE; /* No display driver */

     uint16_t keycode = display_driver->resolve_keysym(keysym);

     if( keycode == 0 )

 	return FALSE; /* Invalid keysym */

     struct keymap_entry *key = input_create_key( keycode );

     key->callback = callback;

     key->data = data;

     key->value = value;

     return TRUE;

 }

 void input_unregister_key( const gchar *keysym )

 {

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

 	return;

     uint16_t keycode = display_driver->resolve_keysym(keysym);

     if( keycode == 0 )

 	return;

     input_delete_key( keycode );

 }

 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 );

     }

 }

 void display_set_driver( display_driver_t driver )

 {

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

 	display_driver->shutdown_driver();

     display_driver = driver;

     if( driver->init_driver != NULL )

 	driver->init_driver();

     driver->set_display_format( 640, 480, COLFMT_ARGB8888 );

     driver->set_render_format( 640, 480, COLFMT_ARGB8888, FALSE );

     texcache_gl_init();

 }