f8ce610c2b
Moved some stuff out of driver96.h. Eventually I'd like to get rid of this file completely. Or at the very least most of it. svn-id: r10589
78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
/* Copyright (C) 1994-2003 Revolution Software Ltd
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*/
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#include "stdafx.h"
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#include "bs2/driver/driver96.h"
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namespace Sword2 {
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// Key buffer size
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#define MAX_KEY_BUFFER 32
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uint8 keyBacklog = 0; // The number of key presses waiting to be processed.
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uint8 keyPointer = 0; // Index of the next key to read from the buffer.
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_keyboardEvent keyBuffer[MAX_KEY_BUFFER]; // The keyboard buffer
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void WriteKey(uint16 ascii, int keycode, int modifiers) {
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if (keyBuffer && keyBacklog < MAX_KEY_BUFFER) {
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_keyboardEvent *slot = &keyBuffer[(keyPointer + keyBacklog) % MAX_KEY_BUFFER];
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slot->ascii = ascii;
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slot->keycode = keycode;
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slot->modifiers = modifiers;
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keyBacklog++;
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}
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}
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/**
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* @return true if there is an unprocessed key waiting in the queue
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*/
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bool KeyWaiting(void) {
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return keyBacklog != 0;
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}
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/**
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* Sets the value of the keyboard event passed in to the current waiting key.
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* @return RD_OK, or an error code to indicate there is no key waiting.
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*/
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int32 ReadKey(_keyboardEvent *ev) {
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if (!keyBacklog)
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return RDERR_NOKEYWAITING;
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if (ev == NULL)
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return RDERR_INVALIDPOINTER;
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ev->ascii = keyBuffer[keyPointer].ascii;
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ev->keycode = keyBuffer[keyPointer].keycode;
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ev->modifiers = keyBuffer[keyPointer].modifiers;
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keyPointer++;
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if (keyPointer == MAX_KEY_BUFFER)
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keyPointer = 0;
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keyBacklog--;
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return RD_OK;
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}
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} // End of namespace Sword2
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