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keyboard: Only send SDL_KEYMAPCHANGED when the keymap actually changes

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Cameron Gutman 2022-07-31 15:34:03 -05:00 • committed by Sam Lantinga
parent a10c57dfe4
commit 8b438f7b51
12 changed files with 33 additions and 28 deletions
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20
src/events/SDL_keyboard.c
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@ -590,24 +590,36 @@ SDL_GetDefaultKeymap(SDL_Keycode * keymap)
}
void
SDL_SetKeymap(int start, SDL_Keycode * keys, int length)
SDL_SetKeymap(int start, SDL_Keycode * keys, int length, SDL_bool send_event)
{
SDL_Keyboard *keyboard = &SDL_keyboard;
SDL_Scancode scancode;
SDL_Keycode normalized_keymap[SDL_NUM_SCANCODES];
if (start < 0 || start + length > SDL_NUM_SCANCODES) {
return;
}
SDL_memcpy(&keyboard->keymap[start], keys, sizeof(*keys) * length);
SDL_memcpy(&normalized_keymap[start], keys, sizeof(*keys) * length);
/* The number key scancodes always map to the number key keycodes.
* On AZERTY layouts these technically are symbols, but users (and games)
* always think of them and view them in UI as number keys.
*/
keyboard->keymap[SDL_SCANCODE_0] = SDLK_0;
normalized_keymap[SDL_SCANCODE_0] = SDLK_0;
for (scancode = SDL_SCANCODE_1; scancode <= SDL_SCANCODE_9; ++scancode) {
keyboard->keymap[scancode] = SDLK_1 + (scancode - SDL_SCANCODE_1);
normalized_keymap[scancode] = SDLK_1 + (scancode - SDL_SCANCODE_1);
}
/* If the mapping didn't really change, we're done here */
if (!SDL_memcmp(&keyboard->keymap[start], &normalized_keymap[start], sizeof(*keys) * length)) {
return;
}
SDL_memcpy(&keyboard->keymap[start], &normalized_keymap[start], sizeof(*keys) * length);
if (send_event) {
SDL_SendKeymapChangedEvent();
}
}