view src/video/ataricommon/SDL_biosevents.c @ 1240:3b8a43c428bb

From Bug #36: There are a couple of issues with the selection of Altivec alpha-blitting routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c. 1) There's no check for the presence of Altivec when checking if the Blit32to565PixelAlphaAltivec() routine can be selected. 2) Altivec cannot be used in video memory, and there's no check if the destination surface is a hardware surface. (Alpha-blitting to a hardware surface with GPU support is a bad idea, but somebody's bound to do it anyway.) Patch to fix these attached.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 08 Jan 2006 21:18:15 +0000
parents a8068adf156b
children a201a8c62522
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 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

/*
 *	Atari keyboard events manager, using BIOS
 *
 *	Patrice Mandin
 */

#include <string.h>

/* Mint includes */
#include <mint/osbind.h>
#include <mint/cookie.h>

#include "SDL.h"
#include "SDL_sysevents.h"
#include "SDL_events_c.h"

#include "SDL_atarikeys.h"
#include "SDL_atarievents_c.h"
#include "SDL_xbiosevents_c.h"

/* To save state of keyboard */
#define ATARIBIOS_MAXKEYS 128

static unsigned char bios_currentkeyboard[ATARIBIOS_MAXKEYS];
static unsigned char bios_previouskeyboard[ATARIBIOS_MAXKEYS];
static unsigned char bios_currentascii[ATARIBIOS_MAXKEYS];

/* Special keys state */
enum {
	K_RSHIFT=0,
	K_LSHIFT,
	K_CTRL,
	K_ALT,
	K_CAPSLOCK,
	K_CLRHOME,
	K_INSERT
};

/* The translation tables from a console scancode to a SDL keysym */
static SDLKey keymap[ATARIBIOS_MAXKEYS];

static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym,
	SDL_bool pressed);
static void UpdateSpecialKeys(int special_keys_state);

void AtariBios_InitOSKeymap(_THIS)
{
	int i, vectors_mask;
	unsigned long dummy;

	memset(bios_currentkeyboard, 0, sizeof(bios_currentkeyboard));
	memset(bios_previouskeyboard, 0, sizeof(bios_previouskeyboard));

	/* Initialize keymap */
	for ( i=0; i<sizeof(keymap); i++ )
		keymap[i] = SDLK_UNKNOWN;

	/* Functions keys */
	for ( i = 0; i<10; i++ )
		keymap[SCANCODE_F1 + i] = SDLK_F1+i;

	/* Cursor keypad */
	keymap[SCANCODE_HELP] = SDLK_HELP;
	keymap[SCANCODE_UNDO] = SDLK_UNDO;
	keymap[SCANCODE_INSERT] = SDLK_INSERT;
	keymap[SCANCODE_CLRHOME] = SDLK_HOME;
	keymap[SCANCODE_UP] = SDLK_UP;
	keymap[SCANCODE_DOWN] = SDLK_DOWN;
	keymap[SCANCODE_RIGHT] = SDLK_RIGHT;
	keymap[SCANCODE_LEFT] = SDLK_LEFT;

	/* Special keys */
	keymap[SCANCODE_ESCAPE] = SDLK_ESCAPE;
	keymap[SCANCODE_BACKSPACE] = SDLK_BACKSPACE;
	keymap[SCANCODE_TAB] = SDLK_TAB;
	keymap[SCANCODE_ENTER] = SDLK_RETURN;
	keymap[SCANCODE_DELETE] = SDLK_DELETE;
	keymap[SCANCODE_LEFTCONTROL] = SDLK_LCTRL;
	keymap[SCANCODE_LEFTSHIFT] = SDLK_LSHIFT;
	keymap[SCANCODE_RIGHTSHIFT] = SDLK_RSHIFT;
	keymap[SCANCODE_LEFTALT] = SDLK_LALT;
	keymap[SCANCODE_CAPSLOCK] = SDLK_CAPSLOCK;

	vectors_mask = ATARI_XBIOS_MOUSEEVENTS|ATARI_XBIOS_JOYSTICKEVENTS;
	if (Getcookie(C_MiNT, &dummy)==C_FOUND) {
		vectors_mask = 0;
	}

	SDL_AtariXbios_InstallVectors(vectors_mask);
}

void AtariBios_PumpEvents(_THIS)
{
	int i;
	SDL_keysym keysym;

	/* Update pressed keys */
	memset(bios_currentkeyboard, 0, ATARIBIOS_MAXKEYS);

	while (Bconstat(_CON)) {
		unsigned long key_pressed;
		unsigned char asciicode, scancode;

		key_pressed=Bconin(_CON);

		asciicode = key_pressed;
		scancode = key_pressed >> 16;

		bios_currentkeyboard[scancode]=0xFF;
		bios_currentascii[scancode]=asciicode;
	}

	/* Read special keys */
	UpdateSpecialKeys(Kbshift(-1));

	/* Now generate events */
	for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
		/* Key pressed ? */
		if (bios_currentkeyboard[i] && !bios_previouskeyboard[i])
			SDL_PrivateKeyboard(SDL_PRESSED,
				TranslateKey(i, bios_currentascii[i], &keysym, SDL_TRUE));
			
		/* Key unpressed ? */
		if (bios_previouskeyboard[i] && !bios_currentkeyboard[i])
			SDL_PrivateKeyboard(SDL_RELEASED,
				TranslateKey(i, bios_currentascii[i], &keysym, SDL_FALSE));
	}

	SDL_AtariXbios_PostMouseEvents(this);

	/* Will be previous table */
	memcpy(bios_previouskeyboard, bios_currentkeyboard, ATARIBIOS_MAXKEYS);
}

static void UpdateSpecialKeys(int special_keys_state)
{
#define UPDATE_SPECIAL_KEYS(numbit,scancode) \
	{	\
		if (special_keys_state & (1<<(numbit))) { \
			bios_currentkeyboard[scancode]=0xFF; \
			bios_currentascii[scancode]=0; \
		}	\
	}

	UPDATE_SPECIAL_KEYS(K_RSHIFT, SCANCODE_RIGHTSHIFT);
	UPDATE_SPECIAL_KEYS(K_LSHIFT, SCANCODE_LEFTSHIFT);
	UPDATE_SPECIAL_KEYS(K_CTRL, SCANCODE_LEFTCONTROL);
	UPDATE_SPECIAL_KEYS(K_ALT, SCANCODE_LEFTALT);
	UPDATE_SPECIAL_KEYS(K_CAPSLOCK, SCANCODE_CAPSLOCK);
}

static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym,
	SDL_bool pressed)
{
	/* Set the keysym information */
	keysym->scancode = scancode;

	if (asciicode)
		keysym->sym = asciicode;		
	else
		keysym->sym = keymap[scancode];

	keysym->mod = KMOD_NONE;
	keysym->unicode = 0;
	if (SDL_TranslateUNICODE && pressed) {
		keysym->unicode = SDL_AtariToUnicodeTable[asciicode];
	}

	return(keysym);
}

void AtariBios_ShutdownEvents(void)
{
	SDL_AtariXbios_RestoreVectors();
}