view src/joystick/amigaos/SDL_sysjoystick.c @ 641:df178851293b

Date: 28 Jun 2003 22:42:52 +0100 From: Alan Swanson Subject: Re: [SDL] New XFree 4.3 Video Mode Patch I have a wee amendment that moves the qsort in set_best_resolution to only occur after failing to find an exact match only. This would make absolutely sure we get a user set mode. While I've never had any problems for my normal resolutions (1280x1024, 1024x768, 800x600 & 640,480) while closely examining the output from qsort I've noticed it doesn't seem to sort the modes fully. These is one definite wrong at 1152x768 and a few that just look wrong to me. From a program (attached) I made to examine this more easily. X has sorted its mode list using the same method as ours (plus frequency), and our user modes get inserted without any other movement. On the patch I've made I've also changed cmpmodes to sort on vertical resolution and then horizontal. Ie vertical is now most significant bit.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 28 Jun 2003 21:52:26 +0000
parents f6ffac90895c
children b8d311d90021
line wrap: on
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/


#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id$";
#endif

/* This is the system specific header for the SDL joystick API */

#include <stdio.h>		/* For the definition of NULL */

#include <libraries/lowlevel.h>
#if defined(__SASC) || defined(STORMC4_WOS)
#include <proto/exec.h>
#include <proto/lowlevel.h>
#include <proto/graphics.h>
#else
#include <inline/exec.h>
#include <inline/lowlevel.h>
#include <inline/graphics.h>
#endif
#include "mydebug.h"

extern struct ExecBase *SysBase;
extern struct GfxBase *GfxBase;
#include <stdlib.h>

#include "SDL_error.h"
#include "SDL_joystick.h"
#include "SDL_sysjoystick.h"
#include "SDL_joystick_c.h"

/* Function to scan the system for joysticks.
 * This function should set SDL_numjoysticks to the number of available
 * joysticks.  Joystick 0 should be the system default joystick.
 * It should return 0, or -1 on an unrecoverable fatal error.
 */


/* Amiga specific datas */
struct Library *LowLevelBase=NULL;

ULONG joybut[]=
{
	JPF_BUTTON_RED,
	JPF_BUTTON_BLUE,
	JPF_BUTTON_PLAY,
	JPF_BUTTON_YELLOW,
	JPF_BUTTON_GREEN,
	JPF_BUTTON_FORWARD,
	JPF_BUTTON_REVERSE,
};

struct joystick_hwdata
{
	ULONG joystate;
};

int SDL_SYS_JoystickInit(void)
{
	if(!LowLevelBase)
	{
		if(LowLevelBase=OpenLibrary("lowlevel.library",37))
			return 2;
	}
	else
		return 2;

	D(bug("%ld joysticks available.\n",SDL_numjoysticks));

	return 0;
}

/* Function to get the device-dependent name of a joystick */
const char *SDL_SYS_JoystickName(int index)
{
	if(index<2&&LowLevelBase)
	{
		switch(index)
		{
			case 0:
				return "Port 1 Amiga Joystick/Joypad";
			case 1:
				return "Port 2 Amiga Joystick/Joypad";
		}
	}

	SDL_SetError("No joystick available with that index");
	return(NULL);
}

/* Function to open a joystick for use.
   The joystick to open is specified by the index field of the joystick.
   This should fill the nbuttons and naxes fields of the joystick structure.
   It returns 0, or -1 if there is an error.
 */

int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
{
	ULONG temp,i;
	D(bug("Opening joystick %ld\n",joystick->index));

	if(!(joystick->hwdata=malloc(sizeof(struct joystick_hwdata))))
		return -1;

/* This loop is to check if the controller is a joypad */

	for(i=0;i<20;i++)
	{
		temp=ReadJoyPort(joystick->index^1); // fix to invert amiga joyports
		WaitTOF();
	}

	if((temp&JP_TYPE_MASK)==JP_TYPE_GAMECTLR)
		joystick->nbuttons=7;
	else
		joystick->nbuttons=3;

	joystick->nhats=0;
	joystick->nballs=0;
	joystick->naxes=2;
	joystick->hwdata->joystate=0L;

	return 0;
}

/* Function to update the state of a joystick - called as a device poll.
 * This function shouldn't update the joystick structure directly,
 * but instead should call SDL_PrivateJoystick*() to deliver events
 * and update joystick device state.
 */
void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
{
	ULONG data;
	int i;

	if(joystick->index<2)
	{
		data=ReadJoyPort(joystick->index);

		if(data&JP_DIRECTION_MASK)
		{
			if(data&JPF_JOY_DOWN)
			{
				if(!(joystick->hwdata->joystate&JPF_JOY_DOWN))
					SDL_PrivateJoystickAxis(joystick,0,127);
			}
			else if(data&JPF_JOY_UP)
			{
				if(!(joystick->hwdata->joystate&JPF_JOY_UP))
					SDL_PrivateJoystickAxis(joystick,0,-127);
			}
			else if(joystick->hwdata->joystate&(JPF_JOY_UP|JPF_JOY_DOWN))
				SDL_PrivateJoystickAxis(joystick,0,0);

			if(data&JPF_JOY_LEFT)
			{
				if(!(joystick->hwdata->joystate&JPF_JOY_LEFT))
					SDL_PrivateJoystickAxis(joystick,1,-127);
			}
			else if(data&JPF_JOY_RIGHT)
			{
				if(!(joystick->hwdata->joystate&JPF_JOY_RIGHT))
					SDL_PrivateJoystickAxis(joystick,1,127);
			}
			else if(joystick->hwdata->joystate&(JPF_JOY_LEFT|JPF_JOY_RIGHT))
				SDL_PrivateJoystickAxis(joystick,1,0);
		}
		else if(joystick->hwdata->joystate&(JPF_JOY_LEFT|JPF_JOY_RIGHT))
		{
				SDL_PrivateJoystickAxis(joystick,1,0);
		}
		else if(joystick->hwdata->joystate&(JPF_JOY_UP|JPF_JOY_DOWN))
		{
				SDL_PrivateJoystickAxis(joystick,0,0);
		}

		for(i=0;i<joystick->nbuttons;i++)
		{
			if( (data&joybut[i]) )
			{
				if(i==1)
					data&=(~(joybut[2]));

				if(!(joystick->hwdata->joystate&joybut[i]))
					SDL_PrivateJoystickButton(joystick,i,SDL_PRESSED);
			}
			else if(joystick->hwdata->joystate&joybut[i])
				SDL_PrivateJoystickButton(joystick,i,SDL_RELEASED);
		}

		joystick->hwdata->joystate=data;
	}

	return;
}

/* Function to close a joystick after use */
void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
{
	if(joystick->hwdata)
		free(joystick->hwdata);
	return;
}

/* Function to perform any system-specific joystick related cleanup */

void SDL_SYS_JoystickQuit(void)
{
	if(LowLevelBase)
	{
		CloseLibrary(LowLevelBase);
		LowLevelBase=NULL;
		SDL_numjoysticks=0;
	}

	return;
}