/*
Copyright (C) 1996-1997 Id Software, Inc.

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

This program 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 General Public License for more details.

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

*/
// vid_sunxil.c -- uses X to setup windows and XIL to copy images (scaled as needed) 
//       to screen

#define _BSD
#define BYTE_DEFINED 1

#include <sys/time.h>
#include <sys/types.h>
#include <errno.h>
#include <thread.h>
#include <unistd.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <xil/xil.h>

#include "quakedef.h"
#include "d_local.h"

#define MIN_WIDTH 320
#define MIN_HEIGHT 200

cvar_t    _windowed_mouse = {"_windowed_mouse","0", true};
cvar_t    m_filter = {"m_filter","0", true};
float old_windowed_mouse;

// The following X property format is defined in Motif 1.1's
// Xm/MwmUtils.h, but QUAKE should not depend on that header
// file. Note: Motif 1.2 expanded this structure with
// uninteresting fields (to QUAKE) so just stick with the
// smaller Motif 1.1 structure.

#define MWM_HINTS_DECORATIONS   2
typedef struct
{
  long flags;
  long functions;
  long decorations;
  long input_mode;
} MotifWmHints;

#define MAX_COLUMN_SIZE 11

#define MAX_MODEDESCS (MAX_COLUMN_SIZE*3)

typedef struct
{
    int   modenum;
    int   iscur;
    char  desc[256];
} modedesc_t;

extern void M_Menu_Options_f (void);
extern void M_Print (int cx, int cy, char *str);
extern void M_PrintWhite (int cx, int cy, char *str);
extern void M_DrawCharacter (int cx, int line, int num);
extern void M_DrawTransPic (int x, int y, qpic_t *pic);
extern void M_DrawPic (int x, int y, qpic_t *pic);

extern int sb_updates;

qboolean        mouse_avail;
int             mouse_buttons=3;
int             mouse_oldbuttonstate;
int             mouse_buttonstate;
float   mouse_x, mouse_y;
float   old_mouse_x, old_mouse_y;
int p_mouse_x;
int p_mouse_y;

typedef struct
{
  int input;
  int output;
} keymap_t;

viddef_t vid; // global video state
unsigned short       d_8to16table[256];

int   num_shades=32;

int d_con_indirect = 0;

int   vid_buffersize;

#define STD_EVENT_MASK \
( \
  StructureNotifyMask | \
  KeyPressMask | \
  KeyReleaseMask | \
  ButtonPressMask | \
  ButtonReleaseMask | \
  ExposureMask | \
  PointerMotionMask | \
  FocusChangeMask \
)

int   VGA_width, VGA_height, VGA_rowbytes, VGA_bufferrowbytes, VGA_planar;
byte  *VGA_pagebase;

qboolean      x_fullscreen = true;
Display       *x_disp = NULL;
int       x_screen, x_screen_width, x_screen_height;
int       x_center_width, x_center_height;
int       x_std_event_mask = STD_EVENT_MASK;
Window        x_win, x_root_win;
qboolean      x_focus = true;
int       global_dx, global_dy;


static Colormap     x_cmap;
static GC     x_gc;
static Visual     *x_vis;
static XVisualInfo    *x_visinfo;
static Atom     aHints = NULL;
static Atom     aWMDelete = NULL;

static qboolean     oktodraw = false;
static qboolean     X11_active = false;


static int verbose=1;

static byte current_palette[768];

cvar_t pixel_multiply = {"pixel_multiply", "2", true};
int current_pixel_multiply = 2;

#define PM(a) (int)((current_pixel_multiply)?((a)*current_pixel_multiply):(a))
#define MP(a) (int)((current_pixel_multiply)?((a)/current_pixel_multiply):(a))

static int        render_pipeline[2];
static XilSystemState       state;
static XilImage       display_image  = NULL;
static XilImage       quake_image  = NULL;
static int        use_mt = 0;
static int        count_frames = 0;

/*
================
D_BeginDirectRect
================
*/
void D_BeginDirectRect (int x, int y, byte *pbitmap, int width, int height)
{
// direct drawing of the "accessing disk" icon isn't supported under Nextstep
}


/*
================
D_EndDirectRect
================
*/
void D_EndDirectRect (int x, int y, int width, int height)
{
// direct drawing of the "accessing disk" icon isnt supported under Nextstep
}


/*
=================
VID_Gamma_f

Keybinding command
=================
*/

byte vid_gamma[256];

void VID_Gamma_f (void)
{

  float g, f, inf;
  int   i;

  if (Cmd_Argc () == 2) {
    g = Q_atof (Cmd_Argv(1));

    for (i=0 ; i<255 ; i++) {
      f = pow ((i+1)/256.0, g);
      inf = f*255 + 0.5;
      if (inf < 0)
        inf = 0;
      if (inf > 255)
        inf = 255;
      vid_gamma[i] = inf;
    }

    VID_SetPalette (current_palette);

    vid.recalc_refdef = 1;        // force a surface cache flush
  }

}

qboolean CheckPixelMultiply (void)
{
  int m;
  int w, h;
  XWindowAttributes wattr;   
  XWindowChanges chg;
  unsigned int value_mask;
  int old_pixel;

  if ((m = (int)pixel_multiply.value) != current_pixel_multiply) {
    if (m < 1)
      m = 1;
    if (m > 4)
      m = 4;

    old_pixel = current_pixel_multiply;
    current_pixel_multiply = m;
    Cvar_SetValue("pixel_multiply", m);
    
    if(XGetWindowAttributes(x_disp, x_win, & wattr) == 0)
      return true; // ???

    memset(&chg, 0, sizeof(chg));
    chg.width = wattr.width/old_pixel * current_pixel_multiply;
    chg.height = wattr.height/old_pixel * current_pixel_multiply;

    if (chg.width < MIN_WIDTH*current_pixel_multiply)
      chg.width = MIN_WIDTH*current_pixel_multiply;
    if (chg.height < MIN_HEIGHT*current_pixel_multiply)
      chg.height = MIN_HEIGHT*current_pixel_multiply;

    XConfigureWindow(x_disp, x_win, CWWidth | CWHeight, &chg);

    vid.width = MP(wattr.width) & ~3;
    vid.height = MP(wattr.height);

    if (vid.width < 320) 
      vid.width = 320;
    if (vid.height < 200)
      vid.height = 200;
    VID_ResetFramebuffer();

    return true;
  }
  return false;
}

// ========================================================================
// Tragic death handler
// ========================================================================

void TragicDeath(int signal_num)
{
  //XAutoRepeatOn(x_disp);
  XCloseDisplay(x_disp);
  Sys_Error("This death brought to you by the number %d\n", signal_num);
}

// ========================================================================
// makes a null cursor
// ========================================================================

static Cursor CreateNullCursor(Display *display, Window root)
{
  Pixmap cursormask; 
  XGCValues xgc;
  GC gc;
  XColor dummycolour;
  Cursor cursor;

  cursormask = XCreatePixmap(display, root, 1, 1, 1/*depth*/);
  xgc.function = GXclear;
  gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
  XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
  dummycolour.pixel = 0;
  dummycolour.red = 0;
  dummycolour.flags = 04;
  cursor = XCreatePixmapCursor(display, cursormask, cursormask,
             &dummycolour,&dummycolour, 0,0);
  XFreePixmap(display,cursormask);
  XFreeGC(display,gc);
  return cursor;
}


void VID_MenuDraw( void )
{
  qpic_t    *p;
    char    *ptr;
    int     i, j, column, row, dup;
    char    temp[100];

    p = Draw_CachePic ("gfx/vidmodes.lmp");
    M_DrawPic ( (320-p->width)/2, 4, p);
  M_Print (4*8, 36 + MAX_COLUMN_SIZE * 8 + 8, "Video mode switching unavailable");
  M_Print (9*8, 36 + MAX_COLUMN_SIZE * 8 + 8*6, "Press any key...");
}

void VID_MenuKey( int key ) { M_Menu_Options_f (); }

// Called at startup to set up translation tables, takes 256 8 bit RGB values
// the palette data will go away after the call, so it must be copied off if
// the video driver will need it again

byte  surfcache[1024*1024];

//
// VID_SetWindowTitle - set the window and icon titles
//

void VID_SetWindowTitle( Window win, char *pszName )
{
  XTextProperty textprop;
  XWMHints    *wmHints;

    // Setup ICCCM properties
    textprop.value = (unsigned char *)pszName;
    textprop.encoding = XA_STRING;
    textprop.format = 8;
    textprop.nitems = strlen(pszName);
    wmHints = XAllocWMHints();
    wmHints->initial_state = NormalState;
    wmHints->flags = StateHint;
    XSetWMProperties( x_disp, win, &textprop, &textprop,
            // Only put WM_COMMAND property on first window.
            com_argv, com_argc, NULL, NULL, NULL );
    XFree( wmHints );

    aWMDelete = XInternAtom( x_disp, "WM_DELETE_WINDOW", False );
    XSetWMProtocols( x_disp, win, &aWMDelete, 1 );
}

//
// VID_FullScreen - open the window in full screen mode
//

qboolean VID_FullScreen( Window win )
{
  MotifWmHints    hints;
  XWindowChanges  changes;

  aHints = XInternAtom( x_disp, "_MOTIF_WM_HINTS", 0 );
  if (aHints == None) {
    Con_Printf( "Could not intern X atom for _MOTIF_WM_HINTS." );
    return( false );
    }

  hints.flags = MWM_HINTS_DECORATIONS;
  hints.decorations = 0; // Absolutely no decorations.
  XChangeProperty( x_disp, win, aHints, aHints, 32, PropModeReplace, (unsigned char *)&hints, 4 );

  changes.x = 0;
  changes.y = 0;
  changes.width = x_screen_width;
  changes.height = x_screen_height;
  changes.stack_mode = TopIf;
  XConfigureWindow( x_disp, win, CWX | CWY | CWWidth | CWHeight | CWStackMode, &changes);
  return( true );
}

void  VID_Init (unsigned char *palette)
{

  int pnum, i;
  XVisualInfo template;
  int num_visuals;
  int template_mask;
  int w, h;

  int desired_width=320, desired_height=200;
  
  Cmd_AddCommand ("gamma", VID_Gamma_f);

  Cvar_RegisterVariable (&pixel_multiply);

  if (pipe(render_pipeline) < 0) 
    Sys_Error("VID_Init: pipe");
  
  for (i=0 ; i<256 ; i++)
    vid_gamma[i] = i;

  vid.width = 320;
  vid.height = 200;
  vid.aspect = 1.0;
  vid.numpages = 2;
  vid.colormap = host_colormap;
  vid.fullbright = 256 - LittleLong (*((int *)vid.colormap + 2048));
  //vid.cbits = VID_CBITS;
  //vid.grades = VID_GRADES;

  srandom(getpid());

  verbose = COM_CheckParm("-verbose");
  count_frames = COM_CheckParm("-count_frames");

//
// open the display
//
  x_disp = XOpenDisplay(0);

  if (!x_disp) {
    if (getenv("DISPLAY"))
      Sys_Error("VID: Could not open display [%s]\n",
        getenv("DISPLAY"));
    else
      Sys_Error("VID: Could not open local display\n");
  }

  x_screen = DefaultScreen( x_disp );
  x_screen_width = WidthOfScreen( ScreenOfDisplay( x_disp, x_screen ) );
  x_screen_height = HeightOfScreen( ScreenOfDisplay( x_disp, x_screen ) );

  x_center_width  = x_screen_width/2;

  x_center_height = x_screen_height/2;

  Con_Printf( "Using screen %d: %dx%d\n", x_screen, x_screen_width, x_screen_height );

  x_root_win = DefaultRootWindow( x_disp);

  //XAutoRepeatOff(x_disp);

// for debugging only
  if (verbose)
    XSynchronize(x_disp, True);

//
// check for command-line window size
//
  if ((pnum=COM_CheckParm("-winsize"))) {
    if (pnum >= com_argc-2)
      Sys_Error("VID: -winsize <width> <height>\n");
    desired_width = Q_atoi(com_argv[pnum+1]);
    desired_height = Q_atoi(com_argv[pnum+2]);
    if (desired_width < 1 || desired_height < 1)
      Sys_Error("VID: Bad window width/height\n");    
  }

  template_mask = VisualScreenMask; // make sure we get the right one 
  template.screen = x_screen;
//
// specify a visual id
//
  if ((pnum=COM_CheckParm("-visualid"))) {
    if (pnum >= com_argc-1)
      Sys_Error("VID: -visualid <id#>\n");
    template.visualid = Q_atoi(com_argv[pnum+1]);
    template_mask |= VisualIDMask;
  } else  {
    // If not specified, find an 8 bit visual since others don't work
//    template.depth = 8;
//    template_mask |= VisualDepthMask;
    int screen;
    screen = XDefaultScreen(x_disp);
    template.visualid =
      XVisualIDFromVisual(XDefaultVisual(x_disp, screen));
    template_mask = VisualIDMask;
  }
//
// pick a visual- warn if more than one was available
//
  x_visinfo = XGetVisualInfo(x_disp, template_mask, &template, &num_visuals);
  if (num_visuals > 1) {
    printf("Found more than one visual id at depth %d:\n", template.depth);
    for (i=0 ; i<num_visuals ; i++)
      printf("  -visualid %d\n", (int)(x_visinfo[i].visualid));
  }
  else if (num_visuals == 0) {
    if (template_mask == VisualIDMask)
      Sys_Error("VID: Bad visual id %d\n", template.visualid);
    else
      Sys_Error("VID: No visuals at depth %d\n", template.depth);
  }

  if (verbose) {
    printf("Using visualid %d:\n", (int)(x_visinfo->visualid));
    printf("  screen %d\n", x_visinfo->screen);
    printf("  red_mask 0x%x\n", (int)(x_visinfo->red_mask));
    printf("  green_mask 0x%x\n", (int)(x_visinfo->green_mask));
    printf("  blue_mask 0x%x\n", (int)(x_visinfo->blue_mask));
    printf("  colormap_size %d\n", x_visinfo->colormap_size);
    printf("  bits_per_rgb %d\n", x_visinfo->bits_per_rgb);
  }

  x_vis = x_visinfo->visual;
//
// See if we're going to do pixel multiply
//
  if (pixel_multiply.value < 1 || pixel_multiply.value > 4)
    Cvar_SetValue("pixel_multiply", 2);
  current_pixel_multiply = pixel_multiply.value;

  w = 320*current_pixel_multiply; // minimum width
  h = 200*current_pixel_multiply; // minimum height
  if (desired_width < w)
    desired_width = w;
  if (desired_height < h)
    desired_height = h;

  vid.width = MP(desired_width);
  vid.height = MP(desired_height);

  //
  // patch things up so game doesn't fail if window is too small
  //

  if (vid.width < 320) 
    vid.width = 320;
  if (vid.height < 200)
    vid.height = 200;

//
// see if we're going to use threads
//
  if(((sysconf(_SC_NPROCESSORS_ONLN) > 1) || COM_CheckParm("-mt")) &&  
    (COM_CheckParm("-no_mt") == 0)) {
    use_mt = 1;
    printf("VID: Using multiple threads!\n");
  }

// setup attributes for main window
  {
    int attribmask = CWEventMask  | CWColormap | CWBorderPixel;
    XSetWindowAttributes attribs;
    Colormap tmpcmap;

    tmpcmap = XCreateColormap(x_disp, XRootWindow(x_disp,
      x_visinfo->screen), x_vis, AllocNone);

    attribs.event_mask = x_std_event_mask;
    attribs.border_pixel = 0;
    attribs.colormap = tmpcmap;

// create the main window
    x_win = XCreateWindow(  x_disp,
      XRootWindow(x_disp, x_visinfo->screen),
      0, 0, // x, y
      desired_width, desired_height,
      0, // borderwidth
      x_visinfo->depth,
      InputOutput,
      x_vis,
      attribmask,
      &attribs );

    if (x_visinfo->class != TrueColor)
      XFreeColormap(x_disp, tmpcmap);

  }

  if (x_visinfo->depth == 8) {

  // create and upload the palette
    if (x_visinfo->class == PseudoColor) {
      x_cmap = XCreateColormap(x_disp, x_win, x_vis, AllocAll);
      VID_SetPalette(palette);
      XSetWindowColormap(x_disp, x_win, x_cmap);
    }

  }

  VID_SetWindowTitle( x_win, "Quake" );

// inviso cursor
  XDefineCursor(x_disp, x_win, CreateNullCursor(x_disp, x_win));

// create the GC
  {
    XGCValues xgcvalues;
    int valuemask = GCGraphicsExposures;
    xgcvalues.graphics_exposures = False;
    x_gc = XCreateGC(x_disp, x_win, valuemask, &xgcvalues );
  }

// map the window
  XMapWindow(x_disp, x_win);
  XSync(x_disp, True) ;        /* wait for map */
//
// wait for first exposure event
//
  {
    XEvent event;
    do{
      XNextEvent(x_disp, &event);
      if (event.type == Expose && !event.xexpose.count)
        oktodraw = true;
    } while (!oktodraw);
  }
//
// initialize XIL
//
  
  state = xil_open();
  
  if(state == NULL) {
    //
    //  XIL's default error handler will print an error msg on stderr
    //
    Sys_Error("xil_open failed\n");
  }
  
  X11_active = true;

  VID_ResetFramebuffer();

  D_InitCaches (surfcache, sizeof(surfcache));
  
  vid_menudrawfn = VID_MenuDraw;
  vid_menukeyfn = VID_MenuKey;
}

VID_ResetFramebuffer()
{
  XilMemoryStorage storage;

  if (use_mt) {
    VID_ResetFramebuffer_MT();
    return;
  }

//printf("VID_ResetFramebuffer: vid.width %d, vid.height %d\n", vid.width, vid.height);

  xil_destroy(display_image);

  xil_destroy(quake_image);

  display_image = xil_create_from_window(state, x_disp, x_win);
  quake_image = xil_create(state, vid.width, vid.height, 1, XIL_BYTE);

  xil_export(quake_image);
  
  if (xil_get_memory_storage(quake_image, &storage) == FALSE)
    Sys_Error("xil_get_memory_storage");
  
  xil_import(quake_image, TRUE);
  xil_export(quake_image);

  if (xil_get_memory_storage(quake_image, &storage) == FALSE)
    Sys_Error("xil_get_memory_storage");

  vid.rowbytes = storage.byte.scanline_stride;
  vid.buffer =   storage.byte.data;
  vid.conbuffer = vid.buffer;
  vid.conrowbytes = vid.rowbytes;
  vid.conwidth = vid.width;
  vid.conheight = vid.height;
  
  vid.maxwarpwidth = WARP_WIDTH;
  vid.maxwarpheight = WARP_HEIGHT;
  vid.recalc_refdef = 1;        // force a surface cache flush

  free(d_pzbuffer);

  d_pzbuffer = malloc(PM(vid.width)*PM(vid.height)*sizeof(*d_pzbuffer));
        //Hunk_HighAllocName(PM(vid.width)*PM(vid.height)*sizeof(*d_pzbuffer),"zbuff");
}

VID_ResetFramebuffer_MT()
{
  XilMemoryStorage storage;
  XilImage drain_renderpipeline();
  XilImage old_display_image;

  void * update_thread();

  printf("VID_ResetFramebuffer: vid.width %d, vid.height %d\n", vid.width, vid.height);

  old_display_image = display_image;

  display_image = xil_create_from_window(state, x_disp, x_win);
  
  if (quake_image == NULL) 
    if (thr_create(NULL, NULL, update_thread, NULL, THR_NEW_LWP, NULL) != 0)
      Sys_Error("VID: thr_create"); 
  
  quake_image = drain_renderpipeline(quake_image);

  xil_destroy(old_display_image);

  free(d_pzbuffer);

  d_pzbuffer = malloc(PM(vid.width)*PM(vid.height)*sizeof(*d_pzbuffer));
}

void VID_ShiftPalette(unsigned char *p)
{
  VID_SetPalette(p);
}

void VID_SetPalette(unsigned char *palette)
{

  int i;
  XColor colors[256];

  if (x_visinfo->class == PseudoColor && x_visinfo->depth == 8) {
      if (palette != current_palette)
        memcpy(current_palette, palette, 768);
      for (i=0 ; i<256 ; i++)
        {
          colors[i].pixel = i;
          colors[i].flags = DoRed|DoGreen|DoBlue;
          colors[i].red = vid_gamma[palette[i*3]] * 257;
          colors[i].green = vid_gamma[palette[i*3+1]] * 257;
          colors[i].blue = vid_gamma[palette[i*3+2]] * 257;
        }
      XStoreColors(x_disp, x_cmap, colors, 256);
    }

}

// Called at shutdown

void  VID_Shutdown (void)
{
  X11_active = false;
  Con_Printf("VID_Shutdown\n");
  //XAutoRepeatOn(x_disp);
  xil_destroy(display_image);
  xil_destroy(quake_image);
  display_image = NULL;
  quake_image = NULL;
  XCloseDisplay(x_disp);
}

int XLateKey(XKeyEvent *ev)
{

  int key;
  char buf[64];
  KeySym keysym;

  XLookupString(ev, buf, sizeof buf, &keysym, 0);

  switch(keysym) {
    case XK_Page_Up:   key = K_PGUP; break;
    case XK_Page_Down:   key = K_PGDN; break;
    case XK_Home:  key = K_HOME; break;
    case XK_End:   key = K_END; break;
    case XK_Left:  key = K_LEFTARROW; break;
    case XK_Right:  key = K_RIGHTARROW;   break;
    case XK_Down:  key = K_DOWNARROW; break;
    case XK_Up:    key = K_UPARROW;  break;
    case XK_Escape: key = K_ESCAPE;   break;
    case XK_Return: key = K_ENTER;     break;
    case XK_Tab:    key = K_TAB;       break;
    case XK_Help:
    case XK_F1:    key = K_F1;        break;
    case XK_F2:    key = K_F2;        break;
    case XK_F3:    key = K_F3;        break;
    case XK_F4:    key = K_F4;        break;
    case XK_F5:    key = K_F5;        break;
    case XK_F6:    key = K_F6;        break;
    case XK_F7:    key = K_F7;        break;
    case XK_F8:    key = K_F8;        break;
    case XK_F9:    key = K_F9;        break;
    case XK_F10:    key = K_F10;       break;
    case XK_F11:    key = K_F11;       break;
    case XK_F12:    key = K_F12;       break;
    case XK_BackSpace:
    case XK_Delete: key = K_BACKSPACE; break;
    case XK_Pause:  key = K_PAUSE;     break;
    case XK_Shift_L:
    case XK_Shift_R:    key = K_SHIFT;    break;
    case XK_Control_L: 
    case XK_Control_R:  key = K_CTRL;    break;
    case XK_Alt_L:  
    case XK_Meta_L: 
    case XK_Alt_R:  
    case XK_Meta_R: key = K_ALT;      break;
      // various other keys on the keyboard
           case XK_F27: key = K_HOME; break;
    case XK_F29: key = K_PGUP; break;
    case XK_F33: key = K_END; break;
    case XK_F35: key = K_PGDN; break;
    case XK_Insert:
    case XK_KP_Insert: key = K_INS; break;
    case XK_F24: key = '-'; break;
    case XK_KP_Add: key = '+'; break;
    case XK_KP_Subtract: key = '-'; break;
    case XK_F25: key = '/'; break;
    case XK_F26: key = '*'; break;

    default:
      key = (unsigned char)*buf;
      break;
    } 

  return key;

}

struct {
  int key;
  int down;
} keyq[64];

int keyq_head=0;
int keyq_tail=0;

int config_notify=0;
int config_notify_width;
int config_notify_height;

void GetEvent(void)
{
  XEvent x_event;
  int b;

  XNextEvent(x_disp, &x_event);
  switch(x_event.type) {
    case KeyPress:
      Key_Event(XLateKey(&x_event.xkey), true);
      break;
    case KeyRelease:
      Key_Event(XLateKey(&x_event.xkey), false);
      break;

    case MotionNotify:

      if (_windowed_mouse.value) {
        mouse_x = (float) ((int)x_event.xmotion.x - (int)(vid.width/2));
        mouse_y = (float) ((int)x_event.xmotion.y - (int)(vid.height/2));
  //printf("m: x=%d,y=%d, mx=%3.2f,my=%3.2f\n", 
  //  x_event.xmotion.x, x_event.xmotion.y, mouse_x, mouse_y);

        /* move the mouse to the window center again */
        XSelectInput( x_disp, x_win, x_std_event_mask & ~PointerMotionMask );
        XWarpPointer(x_disp,None,x_win,0,0,0,0, 
          (vid.width/2),(vid.height/2));
        XSelectInput( x_disp, x_win, x_std_event_mask );
      } else {
        mouse_x = (float) (x_event.xmotion.x-p_mouse_x);
        mouse_y = (float) (x_event.xmotion.y-p_mouse_y);
        p_mouse_x=x_event.xmotion.x;
        p_mouse_y=x_event.xmotion.y;
      }
      break;

    case ButtonPress:
      b=-1;
      if (x_event.xbutton.button == 1)
        b = 0;
      else if (x_event.xbutton.button == 2)
        b = 2;
      else if (x_event.xbutton.button == 3)
        b = 1;
      if (b>=0)
        mouse_buttonstate |= 1<<b;
      break;

    case ButtonRelease:
      b=-1;
      if (x_event.xbutton.button == 1)
        b = 0;
      else if (x_event.xbutton.button == 2)
        b = 2;
      else if (x_event.xbutton.button == 3)
        b = 1;
      if (b>=0)
        mouse_buttonstate &= ~(1<<b);
      break;
    
    case ConfigureNotify:
      //      printf("config notify\n");
      config_notify_width = x_event.xconfigure.width;
      config_notify_height = x_event.xconfigure.height;
      config_notify = 1;
      sb_updates = 0;
      break;
    case Expose:  
      sb_updates = 0;
      break;
    case ClientMessage:
      if (x_event.xclient.data.l[0] == aWMDelete) Host_Quit_f();
      break;
#if 0
    case FocusIn:
      printf("FocusIn...\n");
      x_focus = true;
      break;
    case FocusOut:
      printf("FocusOut...\n");
      x_focus = false;
      break;
#endif
  }

  if (old_windowed_mouse != _windowed_mouse.value) {
    old_windowed_mouse = _windowed_mouse.value;

    if (!_windowed_mouse.value) {
      /* ungrab the pointer */
      XUngrabPointer(x_disp,CurrentTime);
    } else {
      /* grab the pointer */
      XGrabPointer(x_disp,x_win,True,0,GrabModeAsync,
        GrabModeAsync,x_win,None,CurrentTime);
    }
  }
}

// flushes the given rectangles from the view buffer to the screen

void
VID_Update (vrect_t *rects)
{
  void VID_Update_MT(vrect_t *);


  if (count_frames) {
    static int count;
    static long long s;
    long long gethrtime();

    if (count == 0)
      s = gethrtime();

    if (count++ == 200) {
      long long n = gethrtime();
      count = 1;
      printf("%lf frames/secs\n", 200.0/((double)(n-s) / 1e9));
      s = n;
    }
  }

  if (use_mt) {
    VID_Update_MT(rects);
    return;
  }

  // if the window changes dimension, skip this frame

  if (config_notify) {
    int w, h;
    XWindowChanges chg;
    unsigned int value_mask;

    w = 320*current_pixel_multiply; // minimum width
    h = 200*current_pixel_multiply; // minimum height
      
    if (config_notify_width < w || config_notify_height < h) {
      // We must resize the window
      memset(&chg, 0, sizeof(chg));
      value_mask = 0;
      if (config_notify_width < w) {
        config_notify_width = chg.width = w;
        value_mask |= CWWidth;
      }
      if (config_notify_height < h) {
        config_notify_height = chg.height = h;
        value_mask |= CWHeight;
      }
      if (value_mask)
        XConfigureWindow(x_disp, x_win, value_mask, &chg);
    }

    config_notify = 0;

    vid.width = MP(config_notify_width) & ~3;
    vid.height = MP(config_notify_height);

    if (vid.width < 320) 
      vid.width = 320;
    if (vid.height < 200)
      vid.height = 200;
    
    VID_ResetFramebuffer();

    return;
  }
  // if pixel multiply changed, skip this frame
  if (CheckPixelMultiply())
    return;

  while (rects) { // I've never seen more than one rect?
    XilMemoryStorage storage;

    xil_import(quake_image, TRUE); // let xil control the image

    if (current_pixel_multiply < 2)
      xil_copy(quake_image, display_image);
    else
      xil_scale(quake_image, display_image, "nearest",
          (float)current_pixel_multiply, (float)current_pixel_multiply);

    xil_export(quake_image);  // back to quake

    if (xil_get_memory_storage(quake_image, &storage) == FALSE)
      Sys_Error("xil_get_memory_storage");

    vid.buffer =   storage.byte.data;
    vid.conbuffer = vid.buffer;

    rects = rects->pnext;
  }
}

void
VID_Update_MT (vrect_t *rects)
{
  XilImage sched_update();

  // if the window changes dimension, skip this frame

  if (config_notify) {
    int w, h;
    XWindowChanges chg;
    unsigned int value_mask;

    w = 320*current_pixel_multiply; // minimum width
    h = 200*current_pixel_multiply; // minimum height
      
    if (config_notify_width < w || config_notify_height < h) {
      // We must resize the window
      memset(&chg, 0, sizeof(chg));
      value_mask = 0;
      if (config_notify_width < w) {
        config_notify_width = chg.width = w;
        value_mask |= CWWidth;
      }
      if (config_notify_height < h) {
        config_notify_height = chg.height = h;
        value_mask |= CWHeight;
      }
      if (value_mask)
        XConfigureWindow(x_disp, x_win, value_mask, &chg);
    }

    config_notify = 0;

    vid.width = MP(config_notify_width) & ~3;
    vid.height = MP(config_notify_height);

    if (vid.width < 320) 
      vid.width = 320;
    if (vid.height < 200)
      vid.height = 200;
    
    VID_ResetFramebuffer_MT();

    return;
  }
  // if pixel multiply changed, skip this frame
  if (CheckPixelMultiply())
    return;

  quake_image = sched_update(quake_image);
}

XilImage
drain_renderpipeline(XilImage old)
{
  XilImage new;

  XilMemoryStorage storage;
  
  if (old) 
    if (read(render_pipeline[1], &new, sizeof(new)) != sizeof (new)) {
      Sys_Error("drain_renderpipeline: read");
      xil_destroy(new);
    }

  xil_destroy(old);


  new = xil_create(state, vid.width, vid.height, 1, XIL_BYTE);
  
  if (write(render_pipeline[0], &new, sizeof (new)) != sizeof(new)) 
    Sys_Error("drain_renderpipeline: write");

  new = xil_create(state, vid.width, vid.height, 1, XIL_BYTE);

  xil_export(new);

  if (xil_get_memory_storage(new, &storage) == FALSE)
    Sys_Error("xil_get_memory_storage");

  vid.rowbytes = storage.byte.scanline_stride;
  vid.buffer =   storage.byte.data;
  vid.conbuffer = vid.buffer;
  vid.conrowbytes = vid.rowbytes;
  vid.conwidth = vid.width;
  vid.conheight = vid.height;
  
  vid.maxwarpwidth = WARP_WIDTH;
  vid.maxwarpheight = WARP_HEIGHT;
  vid.recalc_refdef = 1;        // force a surface cache flush

  return(new);

}

XilImage
sched_update(XilImage image)
{
  XilImage new;
  XilMemoryStorage storage;

  if (write(render_pipeline[1], &image, sizeof(image)) != sizeof (image)) 
    Sys_Error("sched_update:write");

  if (read(render_pipeline[1], &new, sizeof(new)) != sizeof (new))
    Sys_Error("sched_update:read");

  xil_export(new);

  if (xil_get_memory_storage(new, &storage) == FALSE)
    Sys_Error("xil_get_memory_storage");

  vid.buffer =   storage.byte.data;
  vid.conbuffer = vid.buffer;

  return (new);
}

void *update_thread()
{
  XilImage image;

  if (!X11_active)
    return;

  while (read(render_pipeline[0], &image, sizeof (image)) == sizeof(image)) {

    xil_import(image, TRUE); // let xil control the image

    if (!display_image)
      return;

    if (current_pixel_multiply < 2)
      xil_copy(image, display_image);
    else
      xil_scale(image, display_image, "nearest",
          (float)current_pixel_multiply, (float)current_pixel_multiply);

    if (write(render_pipeline[0], &image, sizeof (image)) != sizeof(image)) 
      Sys_Error("update_thread: write");
  }
}


static int dither;

void VID_DitherOn(void)
{
  if (dither == 0) {
    vid.recalc_refdef = 1;
    dither = 1;
  }
}

void VID_DitherOff(void)
{
  if (dither) {
    vid.recalc_refdef = 1;
    dither = 0;
  }
}

void VID_SetDefaultMode( void )
{
}

int I_OpenWindow(void)
{
  return 0;
}

void I_EraseWindow(int window)
{

}

void I_DrawCircle(int window, int x, int y, int r)
{
}

void I_DisplayWindow(int window)
{
}

void Sys_SendKeyEvents(void)
{
  // get events from x server
       if (x_disp) {
           while (XPending(x_disp)) GetEvent();
           while (keyq_head != keyq_tail) {
               Key_Event(keyq[keyq_tail].key, keyq[keyq_tail].down);
               keyq_tail = (keyq_tail + 1) & 63;
             }
         }
}

void IN_Init (void)
{
  Cvar_RegisterVariable (&_windowed_mouse);
  Cvar_RegisterVariable (&m_filter);
   if ( COM_CheckParm ("-nomouse") )
     return;
   mouse_x = mouse_y = 0.0;
   mouse_avail = 1;
}

void IN_Shutdown (void)
{
   mouse_avail = 0;
}

void IN_Commands (void)
{
  int i;
   
  if (!mouse_avail) return;
   
  for (i=0 ; i<mouse_buttons ; i++) {
    if ( (mouse_buttonstate & (1<<i)) && !(mouse_oldbuttonstate & (1<<i)) )
      Key_Event (K_MOUSE1 + i, true);

    if ( !(mouse_buttonstate & (1<<i)) && (mouse_oldbuttonstate & (1<<i)) )
      Key_Event (K_MOUSE1 + i, false);
  }
  mouse_oldbuttonstate = mouse_buttonstate;
}

void IN_Move (usercmd_t *cmd)
{
  if (!mouse_avail)
    return;
   
  if (m_filter.value) {
    mouse_x = (mouse_x + old_mouse_x) * 0.5;
    mouse_y = (mouse_y + old_mouse_y) * 0.5;
  }

  old_mouse_x = mouse_x;
  old_mouse_y = mouse_y;
   
  mouse_x *= sensitivity.value;
  mouse_y *= sensitivity.value;
   
  if ( (in_strafe.state & 1) || (lookstrafe.value && (in_mlook.state & 1) ))
    cmd->sidemove += m_side.value * mouse_x;
  else
    cl.viewangles[YAW] -= m_yaw.value * mouse_x;
  if (in_mlook.state & 1)
    V_StopPitchDrift ();
   
  if ( (in_mlook.state & 1) && !(in_strafe.state & 1)) {
    cl.viewangles[PITCH] += m_pitch.value * mouse_y;
    if (cl.viewangles[PITCH] > 80)
      cl.viewangles[PITCH] = 80;
    if (cl.viewangles[PITCH] < -70)
      cl.viewangles[PITCH] = -70;
  } else {
    if ((in_strafe.state & 1) && noclip_anglehack)
      cmd->upmove -= m_forward.value * mouse_y;
    else
      cmd->forwardmove -= m_forward.value * mouse_y;
  }
  mouse_x = mouse_y = 0.0;
}

//void VID_UnlockBuffer(void) { }
//void VID_LockBuffer(void) { }