x11.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.
*******************************************************************************/
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.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 "soundux.h"
#include "x11.h"
#include "spc7110.h"

#if 0
#define QT_CLEAN_NAMESPACE
#include <qapplication.h>
#include "snes9x_gui.h"
#endif

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

#ifdef USE_GLIDE
bool8 S9xGlideEnable (bool8);
void S9xGlidePutImage (int, int);
void S9xSwitchToGlideMode (bool8);
#endif

#ifdef USE_AIDO
#include "aido.h"
#endif

#ifdef __linux
// Select seems to be broken in 2.x.x kernels - if a signal interrupts a
// select system call with a zero timeout, the select call is restarted but
// with an infinite timeout! The call will block until data arrives on the
// selected fd(s).
//
// The workaround is to stop the X library calling select in the first
// place! Replace XPending - which polls for data from the X server using 
// select - with an ioctl call to poll for data and then only call the blocking
// XNextEvent if data is waiting.

#define SELECT_BROKEN_FOR_SIGNALS
#endif

#ifdef USE_DGA_EXTENSION
#include <X11/extensions/xf86dga.h>

void CreateFullScreenWindow ();
void S9xSwitchToFullScreen (bool8 enable);

#ifdef USE_VIDMODE_EXTENSION
#if defined (__cplusplus) || defined (c_plusplus)
#include <X11/extensions/xf86vmode.h>
#endif

#define ALL_DEVICE_EVENTS 0
#endif

typedef struct 
{
    bool8		full_screen_available;
    bool8		is_full_screen;
    bool8		scale;
    char		*vram;
    int			line_width;
    int			bank_size;
    int			size;
    int			window_width;
    int			window_height;
    int			saved_window_width;
    int			saved_window_height;
    bool8		saved_image_needs_scaling;
    Window		fs_window;

#ifdef USE_VIDMODE_EXTENSION
    bool8		switch_video_mode;
    XF86VidModeModeInfo	**all_modes;
    int			num_modes;
    XF86VidModeModeInfo orig;
    XF86VidModeModeInfo *best;
    bool8		no_mode_switch;
    bool8		start_full_screen;
#endif
} XF86Data;

static XF86Data XF86;
#endif

GUIData GUI;
extern uint32 joypads [5];

#if 0
QApplication *app;
Snes9xGUI *gui;
#endif

void Scale8 (int width, int height);
void Scale16 (int width, int height);
void Convert8To16 (int width, int height);
void Convert16To8 (int width, int height);
void Convert8To24 (int width, int height);
void Convert8To24Packed (int width, int height);
void Convert16To24 (int width, int height);
void Convert16To24Packed (int width, int height);
void SetupImage ();
int ErrorHandler (Display *, XErrorEvent *);
void TVMode (int width, int height);
void S9xDisplayStateChange (const char *str, bool8 on);

void Init_2xSaI (uint32);
void Super2xSaI (uint8 *srcPtr, uint32 srcPitch,
		 uint8 *deltaPtr, uint8 *dstPtr, uint32 dstPitch,
		 int width, int height);
void SuperEagle (uint8 *srcPtr, uint32 srcPitch, uint8 *deltaPtr, 
		 uint8 *dstPtr, uint32 dstPitch, int width, int height);
void _2xSaI (uint8 *srcPtr, uint32 srcPitch, uint8 *deltaPtr, 
	     uint8 *dstPtr, uint32 dstPitch, int width, int height);
void Scale_2xSaI (uint8 *srcPtr, uint32 srcPitch, uint8 * /* deltaPtr */,
		  uint8 *dstPtr, uint32 dstPitch, 
		  uint32 dstWidth, uint32 dstHeight, int width, int height);

START_EXTERN_C
uint8 snes9x_clear_change_log = 0;
END_EXTERN_C

void S9xDeinitDisplay ()
{
#ifdef USE_GLIDE
    S9xGlideEnable (FALSE);
#elif USE_AIDO
    if (Settings.AIDOShmId)
        return;
#endif

    S9xTextMode ();
    uint32 i;

    for (i = 0; i < sizeof (GUI.to_free) / sizeof (GUI.to_free [0]); i++)
	if (GUI.to_free [i])
	{
	    free (GUI.to_free [i]);
	    GUI.to_free [i] = NULL;
	}

    if (GUI.image)
    {
#ifdef MITSHM
	if (GUI.use_shared_memory)
	{
	    XShmDetach (GUI.display, &GUI.sm_info);
	    GUI.image->data = NULL;
	    XDestroyImage (GUI.image);
	    if (GUI.sm_info.shmaddr)
		shmdt (GUI.sm_info.shmaddr);
	    if (GUI.sm_info.shmid >= 0)
		shmctl (GUI.sm_info.shmid, IPC_RMID, 0);
	    GUI.image = NULL;
        }
	else
#endif
	{
	    XDestroyImage (GUI.image);
	    GUI.image = NULL;
	}
    }
    XSync (GUI.display, False);
    XCloseDisplay (GUI.display);
}

void S9xInitDisplay (int, char **)
{
#ifdef USE_AIDO
    if (Settings.AIDOShmId)
    {
        S9xAIDOInit ();
        return;
    }
#endif

    if (!(GUI.display = XOpenDisplay (NULL)))
    {
	fprintf (stderr, "Failed to connect to X server.\n");
	exit (1);
    }
    GUI.screen = DefaultScreenOfDisplay (GUI.display);
    GUI.screen_num = XScreenNumberOfScreen (GUI.screen);
    GUI.visual = DefaultVisualOfScreen (GUI.screen);
    GUI.window_width = IMAGE_WIDTH;
    GUI.window_height = IMAGE_HEIGHT;

#ifdef USE_OPENGL
    // XXX:
    Settings.OpenGLEnable = TRUE;

    if (Settings.OpenGLEnable)
	S9xOpenGLInit ();
#endif

    XVisualInfo plate;
    XVisualInfo *matches;
    int count;

    plate.visualid = XVisualIDFromVisual (GUI.visual);
    matches = XGetVisualInfo (GUI.display, VisualIDMask, &plate, &count);

    if (!count)
    {
	fprintf (stderr, "Your X Window System server is unwell!\n");
	exit (1);
    }
    GUI.depth = matches[0].depth;
    if ((GUI.depth != 8 && GUI.depth != 15 && GUI.depth != 16 && GUI.depth != 24) ||
	(matches[0].c_class != PseudoColor && matches[0].c_class != TrueColor &&
	 matches[0].c_class != GrayScale))
    {
	fprintf (stderr, "\
Snes9x needs an X Window System server set to 8, 15, 16, 24 or 32-bit colour GUI.depth\n\
supporting PseudoColor, TrueColor or GrayScale.\n");
	exit (1);
    }

    if (GUI.depth >= 15 && !Settings.ForceNoTransparency)
    {
	Settings.Transparency = TRUE;
	Settings.SixteenBit = TRUE;
    }

    GUI.pseudo = matches[0].c_class == PseudoColor ||
	     matches[0].c_class == GrayScale;
    GUI.grayscale = matches[0].c_class == GrayScale;

    if (GUI.depth != 8 || !GUI.pseudo)
    {
	GUI.red_shift = ffs (matches[0].red_mask) - 1;
	GUI.green_shift = ffs (matches[0].green_mask) - 1;
	GUI.blue_shift = ffs (matches[0].blue_mask) - 1;
	GUI.red_size = matches[0].red_mask >> GUI.red_shift;
	GUI.green_size = matches[0].green_mask >> GUI.green_shift;
	GUI.blue_size = matches[0].blue_mask >> GUI.blue_shift;
	if (GUI.depth == 16 && GUI.green_size == 63)
	    GUI.green_shift++;

#ifdef GFX_MULTI_FORMAT
	switch (GUI.depth)
	{
	default:
	case 24:
	case 8:
	    S9xSetRenderPixelFormat (RGB565);
	    Init_2xSaI (565);
	    break;
	case 16:
	    if (GUI.red_size != GUI.green_size || GUI.blue_size != GUI.green_size)
	    {
		// 565 format
		if (GUI.green_shift > GUI.blue_shift && GUI.green_shift > GUI.red_shift)
		    S9xSetRenderPixelFormat (GBR565);
		else
		if (GUI.red_shift > GUI.blue_shift)
		    S9xSetRenderPixelFormat (RGB565);
		else
		    S9xSetRenderPixelFormat (BGR565);

		Init_2xSaI (565);
		break;
	    }
	    /* FALL ... */
	case 15:
	    if (GUI.green_shift > GUI.blue_shift && GUI.green_shift > GUI.red_shift)
		S9xSetRenderPixelFormat (GBR555);
	    else
	    if (GUI.red_shift > GUI.blue_shift)
		S9xSetRenderPixelFormat (RGB555);
	    else
		S9xSetRenderPixelFormat (BGR555);

	    Init_2xSaI (555);
	    break;
	}
#endif	
    }
    XFree ((char *) matches);

#if defined(USE_OPENGL) || defined(USE_AIDO)
    if (Settings.OpenGLEnable || Settings.AIDOShmId)
    {
	S9xSetRenderPixelFormat (RGB555);
        Settings.SixteenBit = TRUE;
        Settings.Transparency = TRUE;
    }
#endif

    int l = 0;
    int i;

    for (i = 0; i < 6; i++)
    {
	int r = (i * 31) / (6 - 1);
	for (int j = 0; j < 6; j++)
	{
	    int g = (j * 31) / (6 - 1);
	    for (int k = 0; k < 6; k++)
	    { 
		int b = (k * 31) / (6 - 1);

		GUI.fixed_colours [l].red = r;
		GUI.fixed_colours [l].green = g;
		GUI.fixed_colours [l++].blue = b;
	    }
	}
    }

    int *color_diff = new int [0x10000];
    int diffr, diffg, diffb, maxdiff = 0, won = 0, lost;
    int r, d = 8;
    for (r = 0; r <= (int) MAX_RED; r++)
    {
	int cr, g, q;