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https://github.com/QB64Official/qb64.git
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213 lines
7 KiB
C
213 lines
7 KiB
C
/*
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* freeglut_input_devices.c
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*
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* Handles miscellaneous input devices via direct serial-port access.
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* Proper X11 XInput device support is not yet supported.
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* Also lacks Mac support.
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*
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* Written by Joe Krahn <krahn@niehs.nih.gov> 2005
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*
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* Copyright (c) 2005 Stephen J. Baker. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* PAWEL W. OLSZTA OR STEPHEN J. BAKER BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <GL/freeglut.h>
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#include "fg_internal.h"
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typedef struct _serialport SERIALPORT;
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/********************* Dialbox definitions ***********************/
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#define DIAL_NUM_VALUATORS 8
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/* dial parser state machine states */
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#define DIAL_NEW (-1)
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#define DIAL_WHICH_DEVICE 0
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#define DIAL_VALUE_HIGH 1
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#define DIAL_VALUE_LOW 2
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/* dial/button box commands */
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#define DIAL_INITIALIZE 0x20
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#define DIAL_SET_LEDS 0x75
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#define DIAL_SET_TEXT 0x61
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#define DIAL_SET_AUTO_DIALS 0x50
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#define DIAL_SET_AUTO_DELTA_DIALS 0x51
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#define DIAL_SET_FILTER 0x53
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#define DIAL_SET_BUTTONS_MOM_TYPE 0x71
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#define DIAL_SET_AUTO_MOM_BUTTONS 0x73
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#define DIAL_SET_ALL_LEDS 0x4b
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#define DIAL_CLEAR_ALL_LEDS 0x4c
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/* dial/button box replies and events */
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#define DIAL_INITIALIZED 0x20
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#define DIAL_BASE 0x30
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#define DIAL_DELTA_BASE 0x40
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#define DIAL_PRESS_BASE 0xc0
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#define DIAL_RELEASE_BASE 0xe0
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/* macros to determine reply type */
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#define IS_DIAL_EVENT(ch) (((ch)>=DIAL_BASE)&&((ch)<DIAL_BASE+DIAL_NUM_VALUATORS))
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#define IS_KEY_PRESS(ch) (((ch)>=DIAL_PRESS_BASE)&&((ch)<DIAL_PRESS_BASE+DIAL_NUM_BUTTONS))
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#define IS_KEY_RELEASE(ch) (((ch)>=DIAL_RELEASE_BASE)&&((ch)<DIAL_RELEASE_BASE+DIAL_NUM_BUTTONS))
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#define IS_INIT_EVENT(ch) ((ch)==DIAL_INITIALIZED)
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/*****************************************************************/
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extern SERIALPORT *serial_open ( const char *device );
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extern void serial_close ( SERIALPORT *port );
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extern int serial_getchar ( SERIALPORT *port );
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extern int serial_putchar ( SERIALPORT *port, unsigned char ch );
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extern void serial_flush ( SERIALPORT *port );
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extern void fgPlatformRegisterDialDevice ( const char *dial_device );
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static void send_dial_event(int dial, int value);
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static void poll_dials(int id);
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/* local variables */
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static SERIALPORT *dialbox_port=NULL;
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/*****************************************************************/
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/*
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* Implementation for glutDeviceGet(GLUT_HAS_DIAL_AND_BUTTON_BOX)
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*/
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int fgInputDeviceDetect( void )
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{
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fgInitialiseInputDevices ();
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if ( !dialbox_port )
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return 0;
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if ( !fgState.InputDevsInitialised )
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return 0;
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return 1;
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}
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/*
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* Try initializing the input device(s)
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*/
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void fgInitialiseInputDevices ( void )
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{
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if( !fgState.InputDevsInitialised )
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{
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const char *dial_device=NULL;
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dial_device = getenv ( "GLUT_DIALS_SERIAL" );
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fgPlatformRegisterDialDevice ( dial_device );
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if ( !dial_device ) return;
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if ( !( dialbox_port = serial_open ( dial_device ) ) ) return;
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serial_putchar(dialbox_port,DIAL_INITIALIZE);
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glutTimerFunc ( 10, poll_dials, 0 );
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fgState.InputDevsInitialised = GL_TRUE;
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}
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}
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/*
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*
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*/
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void fgInputDeviceClose( void )
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{
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if ( fgState.InputDevsInitialised )
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{
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serial_close ( dialbox_port );
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dialbox_port = NULL;
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fgState.InputDevsInitialised = GL_FALSE;
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}
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}
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/********************************************************************/
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/* Check all windows for dialbox callbacks */
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static void fghcbEnumDialCallbacks ( SFG_Window *window, SFG_Enumerator *enumerator )
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{
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/* Built-in to INVOKE_WCB(): if window->Callbacks[CB_Dials] */
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INVOKE_WCB ( *window,Dials, ( ((int*)enumerator->data)[0], ((int*)enumerator->data)[1]) );
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fgEnumSubWindows ( window, fghcbEnumDialCallbacks, enumerator );
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}
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static void send_dial_event ( int num, int value )
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{
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SFG_Enumerator enumerator;
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int data[2];
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data[0] = num;
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data[1] = value;
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enumerator.found = GL_FALSE;
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enumerator.data = data;
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fgEnumWindows ( fghcbEnumDialCallbacks, &enumerator );
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}
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/********************************************************************/
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static void poll_dials ( int id )
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{
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int data;
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static int dial_state = DIAL_NEW;
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static int dial_which;
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static int dial_value;
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static int dials[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
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if ( !dialbox_port ) return;
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while ( (data=serial_getchar(dialbox_port)) != EOF )
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{
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if ( ( dial_state > DIAL_WHICH_DEVICE ) || IS_DIAL_EVENT ( data ) )
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{
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switch ( dial_state )
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{
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case DIAL_WHICH_DEVICE:
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dial_which = data - DIAL_BASE;
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dial_state++;
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break;
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case DIAL_VALUE_HIGH:
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dial_value = ( data << 8 );
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dial_state++;
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break;
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case DIAL_VALUE_LOW:
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dial_value |= data;
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if ( dial_value & 0x8000 ) dial_value -= 0x10000;
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dials[dial_which] = dial_value;
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send_dial_event ( dial_which + 1, dial_value * 360 / 256 );
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dial_state = DIAL_WHICH_DEVICE;
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break;
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default:
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/* error: Impossible state value! */
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break;
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}
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}
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else if ( data == DIAL_INITIALIZED )
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{
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fgState.InputDevsInitialised = GL_TRUE;
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dial_state = DIAL_WHICH_DEVICE;
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serial_putchar(dialbox_port,DIAL_SET_AUTO_DIALS);
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serial_putchar(dialbox_port,0xff);
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serial_putchar(dialbox_port,0xff);
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}
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else /* Unknown data; try flushing. */
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serial_flush(dialbox_port);
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}
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glutTimerFunc ( 2, poll_dials, 0 );
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}
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