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Added reverse look-up table for better keyboard driver efficiency
This commit is contained in:
twinaphex 2020-08-04 02:23:20 +02:00
parent 98b594666f
commit 498f31229c
1 changed files with 28 additions and 0 deletions
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28
input/input_keymaps.c
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@ -1,6 +1,7 @@
/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2017 - Daniel De Matteis
* Copyright (C) 2020 - neil4 (reverse LUT keyboard)
*
* RetroArch 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 Found-
@ -1902,8 +1903,13 @@ const struct rarch_key_map rarch_key_map_winraw[] = {
* so they can't be placed in a C source file */
#endif
/* TODO/FIXME - global */
enum retro_key rarch_keysym_lut[RETROK_LAST];
/* TODO/FIXME - static globals */
static unsigned *rarch_keysym_rlut = NULL;
static unsigned rarch_keysym_rlut_size = 0;
/**
* input_keymaps_init_keyboard_lut:
* @map : Keyboard map.
@ -1912,10 +1918,29 @@ enum retro_key rarch_keysym_lut[RETROK_LAST];
**/
void input_keymaps_init_keyboard_lut(const struct rarch_key_map *map)
{
const struct rarch_key_map *map_start = map;
memset(rarch_keysym_lut, 0, sizeof(rarch_keysym_lut));
rarch_keysym_rlut_size = 0;
for (; map->rk != RETROK_UNKNOWN; map++)
{
rarch_keysym_lut[map->rk] = (enum retro_key)map->sym;
if (map->sym > rarch_keysym_rlut_size)
rarch_keysym_rlut_size = map->sym;
}
if (rarch_keysym_rlut_size < 65536)
{
if (rarch_keysym_rlut)
free(rarch_keysym_rlut);
rarch_keysym_rlut = calloc(++rarch_keysym_rlut_size, sizeof(unsigned));
for (map = map_start; map->rk != RETROK_UNKNOWN; map++)
rarch_keysym_rlut[map->sym] = (enum retro_key)map->rk;
}
else
rarch_keysym_rlut_size = 0;
}
/**
@ -1931,6 +1956,9 @@ enum retro_key input_keymaps_translate_keysym_to_rk(unsigned sym)
{
unsigned i;
if (rarch_keysym_rlut && sym < rarch_keysym_rlut_size)
return (enum retro_key)rarch_keysym_rlut[sym];
for (i = 0; i < ARRAY_SIZE(rarch_keysym_lut); i++)
{
if (rarch_keysym_lut[i] != sym)