xf86.cpp

SFC游戏模拟器 snes9x 1.43 的原代码

/*******************************************************************************
  Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
 
  (c) Copyright 1996 - 2002 Gary Henderson ([e-mail]) and
                            Jerremy Koot ([e-mail])

  (c) Copyright 2001 - 2004 John Weidman ([e-mail])

  (c) Copyright 2002 - 2004 Brad Jorsch ([e-mail]),
                            funkyass ([e-mail]),
                            Joel Yliluoma (http://iki.fi/bisqwit/)
                            Kris Bleakley ([e-mail]),
                            Matthew Kendora,
                            Nach ([e-mail]),
                            Peter Bortas ([e-mail]) and
                            zones ([e-mail])

  C4 x86 assembler and some C emulation code
  (c) Copyright 2000 - 2003 zsKnight ([e-mail]),
                            _Demo_ ([e-mail]), and Nach

  C4 C++ code
  (c) Copyright 2003 Brad Jorsch

  DSP-1 emulator code
  (c) Copyright 1998 - 2004 Ivar ([e-mail]), _Demo_, Gary Henderson,
                            John Weidman, neviksti ([e-mail]),
                            Kris Bleakley, Andreas Naive

  DSP-2 emulator code
  (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
                     Lord Nightmare ([e-mail]

  OBC1 emulator code
  (c) Copyright 2001 - 2004 zsKnight, pagefault ([e-mail]) and
                            Kris Bleakley
  Ported from x86 assembler to C by sanmaiwashi

  SPC7110 and RTC C++ emulator code
  (c) Copyright 2002 Matthew Kendora with research by
                     zsKnight, John Weidman, and Dark Force

  S-DD1 C emulator code
  (c) Copyright 2003 Brad Jorsch with research by
                     Andreas Naive and John Weidman
 
  S-RTC C emulator code
  (c) Copyright 2001 John Weidman
  
  ST010 C++ emulator code
  (c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora

  Super FX x86 assembler emulator code 
  (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault 

  Super FX C emulator code 
  (c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman


  SH assembler code partly based on x86 assembler code
  (c) Copyright 2002 - 2004 Marcus Comstedt ([e-mail]) 

 
  Specific ports contains the works of other authors. See headers in
  individual files.
 
  Snes9x homepage: http://www.snes9x.com
 
  Permission to use, copy, modify and distribute Snes9x in both binary and
  source form, for non-commercial purposes, is hereby granted without fee,
  providing that this license information and copyright notice appear with
  all copies and any derived work.
 
  This software is provided 'as-is', without any express or implied
  warranty. In no event shall the authors be held liable for any damages
  arising from the use of this software.
 
  Snes9x is freeware for PERSONAL USE only. Commercial users should
  seek permission of the copyright holders first. Commercial use includes
  charging money for Snes9x or software derived from Snes9x.
 
  The copyright holders request that bug fixes and improvements to the code
  should be forwarded to them so everyone can benefit from the modifications
  in future versions.
 
  Super NES and Super Nintendo Entertainment System are trademarks of
  Nintendo Co., Limited and its subsidiary companies.
*******************************************************************************/
/*
   XF86 code (xf86.cpp, this file) (c) Copyright 1998 Maciej Babinski,
		use restricted to above terms.
   Question/comments regarding this file only: [e-mail]
 */

#ifdef __linux
//#define USE_XF86VIDMODE

#include <asm/ioctls.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <linux/ioctl.h>

#include <fcntl.h>
#include <sys/types.h>

#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <signal.h>
#include "snes9x.h"
#include "memmap.h"
#include "debug.h"
#include "ppu.h"
#include "snapshot.h"
#include "gfx.h"
#include "display.h"
#include "apu.h"
#include <asm/io.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include "snes9x.h"
#include "memmap.h"
#include "debug.h"
#include "ppu.h"
#include "snapshot.h"
#include "gfx.h"
#include "display.h"
#include "apu.h"

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>

#include <X11/extensions/xf86dga.h>

#ifdef USE_XF86VIDMODE

/* GH: Added to allow to be compiled using C++ compiler */
#if defined (__cplusplus) || defined (c_plusplus)
#define private c_private
#endif
#   include <X11/extensions/xf86vmode.h>

static XF86VidModeModeInfo	*orig_mode = NULL;
static XF86VidModeModeInfo	*mod320x240 = NULL;
bool cmpModeInfo (XF86VidModeModeInfo, XF86VidModeModeInfo);
XF86VidModeModeInfo *ModeLine2ModeInfo (XF86VidModeModeLine, int);
#endif


void quit (int sig)
{
	printf ("Received signal %d, quitting\n", sig);
	S9xExit ();
}


struct vidinfo {
	int bitdepth;
	int screendepth;
	int width;
	int height;
	int banksize;
	int memsize;
	char *vidMemBegin;
	char *scrnBegin;
};
struct vidinfo	ourvideo;

static Display		*ourdisp = NULL;
/*
   These three vars are "constants" for a particular display, who's value we
   calculate in S9xInitDisplay, so that we don't have to do it on the fly in
   S9xPutImage.
	mEtoE = distance between end of once line of image and beginning of
	        next one (units differ between bit-depths).
*/
static int		mWide, mHigh, mEtoE; 

static Colormap		cmap;
static XColor		colors[256];
static int		ourscreen;
static bool		is_graphics=FALSE;
static Window		inputwin;
static Window		rootWindow;
static int		is32or24 = 32;

extern int		joypads[5];


void S9xInitDisplay (int argc, char **argv)
{
	Screen			*scrn;
	XSetWindowAttributes	xattr;

	signal (SIGINT, quit);
	signal (SIGTERM, quit);

	if ((ourdisp = XOpenDisplay(NULL)) == NULL) {
		printf ("Can't connect to X server!\n");
		S9xExit ();
	}


	ourscreen = DefaultScreen (ourdisp);
	scrn = DefaultScreenOfDisplay (ourdisp);
	ourvideo.bitdepth = DefaultDepth (ourdisp, ourscreen);
	ourvideo.screendepth = ourvideo.bitdepth / 8;
	rootWindow = RootWindowOfScreen (scrn);

	xattr.override_redirect = True;
	inputwin = XCreateWindow (ourdisp, RootWindowOfScreen(scrn),
	                          10, 10, 100, 100, 0, 0, InputOutput,
	                          DefaultVisualOfScreen(scrn),
	                          CWOverrideRedirect, &xattr);
	XMapWindow (ourdisp, inputwin);

	ourvideo.height = HeightOfScreen (scrn);



	switch (ourvideo.bitdepth) {
		case  8:
			Settings.SixteenBit = FALSE;
			Settings.Transparency = FALSE;
			cmap = XCreateColormap (ourdisp, rootWindow,
			                        DefaultVisualOfScreen (scrn),
						AllocAll);
			XSetWindowColormap (ourdisp, inputwin, cmap);
			for (int i=0; i<256; i++) {
				colors[i].pixel = i;
				colors[i].flags = DoRed | DoGreen | DoBlue;
			}
			break;
		case 16:
			Settings.SixteenBit = TRUE;
			if (!Settings.ForceNoTransparency)
				Settings.Transparency = TRUE;
			break;
		case 24:
			if (is32or24 == 32) {
				ourvideo.bitdepth = 32;
				ourvideo.screendepth = 4;
			}
			Settings.SixteenBit = TRUE;
			if (!Settings.ForceNoTransparency)
				Settings.Transparency = TRUE;
			break;
		default:
			printf ("Color depth %d not supported!\n");
			S9xExit ();
			break;
	}
	printf ("Found %d bit display\n", ourvideo.bitdepth);

	XFree(scrn);

	XF86DGAGetVideo (ourdisp, ourscreen, &(ourvideo.vidMemBegin),
          	       &(ourvideo.width), &(ourvideo.banksize),
          	       &(ourvideo.memsize));

#ifdef USE_XF86VIDMODE
   {
	XF86VidModeModeInfo	**all_modes;
	int			mode_count;
	XF86VidModeModeLine	mod_tmp;
	int			dotclock_tmp;
	int			x;
	
	XF86VidModeGetModeLine (ourdisp, ourscreen, &dotclock_tmp, &mod_tmp);

	orig_mode = ModeLine2ModeInfo (mod_tmp, dotclock_tmp);
	if (orig_mode->hdisplay == 320 && orig_mode->vdisplay == 240) {
		mod320x240 = orig_mode;
	} else {
		XF86VidModeGetAllModeLines (ourdisp,ourscreen, &mode_count,
		                            &all_modes);
		for (x = 0; x < mode_count; x++)
			if (all_modes[x]->hdisplay == 320 &&
			    all_modes[x]->vdisplay == 240) {
				mod320x240 = (XF86VidModeModeInfo *) malloc (
				               sizeof(XF86VidModeModeInfo));
				*mod320x240 = *(all_modes[x]);
				break;
			} else
				XFree (all_modes[x]->c_private);

		if (mod320x240 == NULL) {
			printf ("No 320x240 mode available!\n");
			S9xExit ();
		}

	}
	XFree(all_modes);

   }
#endif

	GFX.Pitch = IMAGE_WIDTH * (Settings.SixteenBit ? 2 : 1);
	GFX.Screen = (uint8 *) malloc (IMAGE_HEIGHT * GFX.Pitch);

	if (Settings.Transparency)
		GFX.SubScreen = (uint8 *) malloc (IMAGE_HEIGHT * GFX.Pitch);

	switch (ourvideo.bitdepth) {
		case  8:
			mWide = IMAGE_WIDTH / 4;
			mHigh = IMAGE_HEIGHT;
			mEtoE = (ourvideo.width - IMAGE_WIDTH) /4;
			break;
		case 16:
			mWide = IMAGE_WIDTH / 2;
			mHigh = IMAGE_HEIGHT;
			mEtoE = (ourvideo.width - IMAGE_WIDTH) / 2;
			break;
		case 24:
			mWide = IMAGE_WIDTH;
			mHigh = IMAGE_HEIGHT;
			mEtoE = (ourvideo.width - IMAGE_WIDTH) * 3;
			break;
		case 32:
			mWide = IMAGE_WIDTH;
			mHigh = IMAGE_HEIGHT;
			mEtoE = (ourvideo.width - IMAGE_WIDTH) * 4;
		default:
			break;
	}
	ourvideo.scrnBegin = ourvideo.vidMemBegin + (320 - IMAGE_WIDTH) * ourvideo.screendepth / 2 + ourvideo.width * ourvideo.screendepth * 8;
}

void S9xGraphicsMode ()
{
	if (is_graphics)
		return;

	XSelectInput (ourdisp, inputwin, KeyPressMask | KeyReleaseMask);
	XSetInputFocus (ourdisp, inputwin, RevertToNone, CurrentTime);
	XGrabKeyboard (ourdisp, inputwin, True, GrabModeAsync, GrabModeAsync,
	               CurrentTime);
	XGrabPointer (ourdisp, inputwin, True, 0, 
	              GrabModeAsync, GrabModeAsync, inputwin, None, CurrentTime);
	
	XFlush(ourdisp);

	XAutoRepeatOff (ourdisp);

#ifdef USE_XF86VIDMODE
	if (orig_mode != mod320x240) {
		XF86VidModeSwitchToMode (ourdisp,ourscreen, mod320x240);
	}
	XFlush (ourdisp);
	XF86VidModeSetViewPort (ourdisp, ourscreen, 0, 0);
	XFlush (ourdisp);
#endif
	
	XF86DGADirectVideo (ourdisp, ourscreen, XF86DGADirectGraphics);
	memset ((void *) ourvideo.vidMemBegin, 0, ourvideo.width * 240 *
	        ourvideo.screendepth);
	is_graphics = TRUE;
	XFlush (ourdisp);
}

void S9xTextMode () 
{
	if (!is_graphics)
		return;

	if (ourdisp == NULL)
		return;
	

	XF86DGADirectVideo (ourdisp, ourscreen, 0);
#ifdef USE_XF86VIDMODE
	if (orig_mode != mod320x240) {
		XF86VidModeSwitchToMode (ourdisp, ourscreen, orig_mode);
	}
#endif
	XAutoRepeatOn (ourdisp);

	XUngrabKeyboard (ourdisp, CurrentTime);
	XUngrabPointer (ourdisp, CurrentTime);
	XSelectInput (ourdisp, inputwin, 0);
	XSync (ourdisp, True);

	is_graphics = FALSE;
} 

void S9xDeinitDisplay ()
{
	S9xTextMode ();

	if (ourdisp == NULL)
		return;


	XDestroyWindow (ourdisp, inputwin);

	free (GFX.Screen);
	free (GFX.SubScreen);
#ifdef USE_XF86VIDMODE
	free (orig_mode);
	free (mod320x240);
	if (orig_mode->privsize)
		XFree (orig_mode->c_private);
	if (mod320x240->privsize)
		XFree (orig_mode->c_private);
#endif
	XFree (ourdisp);
}

void S9xSetPalette () 
{
	int		Brightness;
	
	if (ourvideo.bitdepth != 8)
		return;

	Brightness = IPPU.MaxBrightness *138;

	for (int i = 0; i < 256; i++) {
		colors[i].red = ((PPU.CGDATA[i] >> 0) & 0x1F) * Brightness;
		colors[i].green = ((PPU.CGDATA[i] >> 5) & 0x1F) * Brightness;
		colors[i].blue = ((PPU.CGDATA[i] >> 10) & 0x1F) * Brightness;
	}

	XStoreColors (ourdisp, cmap, colors, 256);
	XF86DGAInstallColormap (ourdisp, ourscreen, cmap);
}

#define RED(r)		((uint8) (((r >> 11) & 31) * 256 / 32))
#define GREEN(g)	((uint8) (((g >> 5) & 63) * 256 / 64))
#define BLUE(b)		((uint8) (((b & 31)) * 256 / 32))

void S9xPutImage (int width, int height)
{
	register int x,y;
	

	switch (ourvideo.bitdepth) {
		case  8:
		case 16:
			{
			long int	*p, *q;
			p = (long int *) GFX.Screen;
			q = (long int *) ourvideo.scrnBegin;

			for (y=0;y<mHigh;y++) {
				for (x=0;x<mWide;x++) {
					*q = *p;
					q++, p++;
					}
				q += mEtoE;
				}
			}
			break;
/*
		case 24:
			{
			uint16		*p;