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lxdream.org :: lxdream/src/display.c
lxdream 0.9.1
released Jun 29
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filename src/display.c
changeset 477:9a373f2ff009
prev451:50622730f226
next531:f0fee3ba71d1
author nkeynes
date Wed Oct 31 09:10:23 2007 +0000 (12 years ago)
permissions -rw-r--r--
last change Add save/restore of render buffers in save states
Gzip memory blocks in save states
Move front-buffer management back to pvr2
Add screenshot preview when loading save states
Various minor fixes and cleanups
file annotate diff log raw
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/**
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 * $Id: display.c,v 1.12 2007-10-31 09:10:23 nkeynes Exp $
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 *
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 * Generic support for keyboard and other input sources. The active display
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 * driver is expected to deliver events here, where they're translated and
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 * passed to the appropriate dreamcast controllers (if any).
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 *
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 * Copyright (c) 2005 Nathan Keynes.
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 */
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#include <stdint.h>
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#include <assert.h>
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#include "dream.h"
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#include "display.h"
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#include "pvr2/pvr2.h"
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typedef struct keymap_entry {
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    uint16_t keycode;
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    input_key_callback_t callback;
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    void *data;
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    uint32_t value;
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} *keymap_entry_t;
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/**
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 * Colour format information
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 */
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struct colour_format colour_formats[] = {
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    { GL_UNSIGNED_SHORT_1_5_5_5_REV, GL_BGRA, GL_RGB5_A1, 2 },
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    { GL_UNSIGNED_SHORT_5_6_5, GL_RGB, GL_RGB5, 2 },
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    { GL_UNSIGNED_SHORT_4_4_4_4_REV, GL_BGRA, GL_RGBA4, 2 },
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    { GL_UNSIGNED_BYTE, GL_BGRA, GL_RGBA8, 4 }, /* YUV decoded to ARGB8888 */
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    { GL_UNSIGNED_BYTE, GL_BGR, GL_RGB, 3 },
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    { GL_UNSIGNED_BYTE, GL_BGRA, GL_RGBA8, 4 },
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    { GL_UNSIGNED_BYTE, GL_BGRA, GL_RGBA8, 4 }, /* Index4 decoded */
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    { GL_UNSIGNED_BYTE, GL_BGRA, GL_RGBA8, 4 }, /* Index8 decoded */
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    { GL_UNSIGNED_BYTE, GL_BGRA, GL_RGBA8, 4 },
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    { GL_UNSIGNED_BYTE, GL_RGB, GL_RGB, 3 },
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};
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/**
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 * FIXME: make this more memory efficient
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 */
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struct keymap_entry *keymap[65536];
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static struct keymap_entry *input_create_key( uint16_t keycode )
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{
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    struct keymap_entry *key = keymap[ keycode ];
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    if( key == NULL ) {
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	key = malloc( sizeof( struct keymap_entry ) );
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	assert( key != NULL );
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	keymap[ keycode ] = key;
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	key->keycode = keycode;
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    }
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    return key;
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}
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static void input_delete_key( uint16_t keycode, input_key_callback_t callback, void *data,
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			      uint32_t value )
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{
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    struct keymap_entry *key = keymap[keycode];
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    if( key != NULL && key->callback == callback && key->data == data && key->value == value ) {
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	free( key );
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	keymap[keycode] = NULL;
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    }
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}
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static struct keymap_entry *input_get_key( uint16_t keycode )
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{
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    return keymap[ keycode ];
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}
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gboolean input_register_key( const gchar *keysym, input_key_callback_t callback,
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			     void *data, uint32_t value )
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{
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    if( display_driver == NULL || keysym == NULL || display_driver->resolve_keysym == NULL )
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	return FALSE; /* No display driver */
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    gchar **strv = g_strsplit(keysym, ",", 16);
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    gchar **s = strv;
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    while( *s != NULL ) {
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	uint16_t keycode = display_driver->resolve_keysym(g_strstrip(*s));
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	if( keycode == 0 )
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	    return FALSE; /* Invalid keysym */
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	struct keymap_entry *key = input_create_key( keycode );
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	key->callback = callback;
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	key->data = data;
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	key->value = value;
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	s++;
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    }
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    g_strfreev(strv);
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    return TRUE;
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}
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void input_unregister_key( const gchar *keysym, input_key_callback_t callback,
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			   void *data, uint32_t value )
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{
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    if( display_driver == NULL || keysym == NULL )
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	return;
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    uint16_t keycode = display_driver->resolve_keysym(keysym);
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    if( keycode == 0 )
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	return;
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    input_delete_key( keycode, callback, data, value );
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}
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gboolean input_is_key_valid( const gchar *keysym )
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{
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    if( display_driver == NULL )
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	return FALSE; /* No display driver */
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    return display_driver->resolve_keysym(keysym) != 0;
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}
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gboolean input_is_key_registered( const gchar *keysym )
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{
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    if( display_driver == NULL )
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	return FALSE;
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    uint16_t keycode = display_driver->resolve_keysym(keysym);
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    if( keycode == 0 )
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	return FALSE;
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    return input_get_key( keycode ) != NULL;
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}
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void input_event_keydown( uint16_t keycode )
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{
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    struct keymap_entry *key = input_get_key(keycode);
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    if( key != NULL ) {
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	key->callback( key->data, key->value, TRUE );
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    }	
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}
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void input_event_keyup( uint16_t keycode )
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{
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    struct keymap_entry *key = input_get_key(keycode);
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    if( key != NULL ) {
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	key->callback( key->data, key->value, FALSE );
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    }
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}
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gboolean display_set_driver( display_driver_t driver )
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{
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    gboolean rv = TRUE;
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    if( display_driver != NULL && display_driver->shutdown_driver != NULL ) 
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	display_driver->shutdown_driver();
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    display_driver = driver;
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    if( driver->init_driver != NULL )
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	rv = driver->init_driver();
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    if( rv ) {
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	texcache_gl_init();
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    }
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    return rv;
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}
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