X-Git-Url: https://git.artsoft.org/?p=rocksndiamonds.git;a=blobdiff_plain;f=src%2Fgfxload.c;fp=src%2Fgfxload.c;h=0000000000000000000000000000000000000000;hp=bcc7f221445e3f7476fb74e5e7d6e95dd2258c6e;hb=6ea6dac4068909e5adc06102dd215539c64afef8;hpb=d2185c2bcdba9fc69846c99a2d01ef037ce2266f

diff --git a/src/gfxload.c b/src/gfxload.c
deleted file mode 100644
index bcc7f221..00000000
--- a/src/gfxload.c
+++ /dev/null
@@ -1,1120 +0,0 @@
-/***********************************************************
-*  Rocks'n'Diamonds -- McDuffin Strikes Back!              *
-*----------------------------------------------------------*
-*  (c) 1995-98 Artsoft Entertainment                       *
-*              Holger Schemel                              *
-*              Oststrasse 11a                              *
-*              33604 Bielefeld                             *
-*              phone: ++49 +521 290471                     *
-*              email: aeglos@valinor.owl.de                *
-*----------------------------------------------------------*
-*  gfxload.c                                               *
-***********************************************************/
-
-#ifndef MSDOS
-#include "gfxload.h"
-
-
-
-
-
-
-extern Window  		window;
-extern void Delay(long);
-
-
-
-
-
-
-#ifdef DEBUG
-/*
-#define DEBUG_GIF
-#define DEBUG_ILBM
-*/
-#endif
-
-struct IFF_ILBM_FORM_big_endian
-{
-  char magic_FORM[4];
-  unsigned char chunk_size[4];
-  char magic_ILBM[4];
-};
-
-struct IFF_ILBM_BMHD_big_endian
-{
-  char Width[2], Height[2];
-  char LeftEdge[2], TopEdge[2];
-  char Depth;
-  char Mask;
-  char Compression;
-  char pad1;
-  char transparentColor[2];
-  char xAspect, yAspect;
-  char pageWidth[2], pageHeight[2];
-};
-
-struct IFF_ILBM_BMHD
-{
-  unsigned int Width, Height;
-  int LeftEdge, TopEdge;
-  unsigned int Depth;
-  unsigned int Mask;
-  unsigned int Compression;
-  unsigned char pad1;
-  unsigned int transparentColor;
-  unsigned int xAspect, yAspect;
-  int pageWidth, pageHeight;
-};
-
-static int ConvertXImageDepth(Display *, XImage **);
-static int Read_GIF_to_Pixmap_or_Bitmap(Display *, char *, Pixmap *, int);
-
-#define READ_GIF_TO_BITMAP	0
-#define READ_GIF_TO_PIXMAP	1
-
-int Read_GIF_to_Bitmap(Display *display, char *filename, Pixmap *pixmap)
-{
-  return(Read_GIF_to_Pixmap_or_Bitmap(display, filename,
-				      pixmap, READ_GIF_TO_BITMAP));
-}
-
-int Read_GIF_to_Pixmap(Display *display, char *filename, Pixmap *pixmap)
-{
-  return(Read_GIF_to_Pixmap_or_Bitmap(display, filename,
-				      pixmap, READ_GIF_TO_PIXMAP));
-}
-
-int Read_GIF_to_Pixmap_or_Bitmap(Display *display, char *filename,
-				 Pixmap *pixmap, int mode)
-{
-  XImage *image = NULL;
-  Pixmap new_pixmap = 0;
-  int return_code;
-
-  *pixmap = 0;
-  return_code = Read_GIF_to_XImage(display, filename, &image);
-  if (return_code != GIF_Success)
-    return(return_code);
-
-  if (image)
-  {
-    int screen = DefaultScreen(display);
-    Drawable root = RootWindow(display,screen);
-    int depth = DefaultDepth(display, screen);
-    int width = image->width;
-    int height = image->height;
-
-    if (mode == READ_GIF_TO_BITMAP)
-    {
-      int i,x,y;
-      unsigned long black_pixel = BlackPixel(display,screen);
-      int bytes_per_line = (width+7) / 8;
-      int size = bytes_per_line * height;
-      char *data, *ptr;
-
-      data = (char *)malloc(size);
-      if (!data)
-	return(GIF_NoMemory);
-
-      ptr = data;
-      for(i=0;i<size;i++)
-	*ptr++ = 0;
-
-      for(y=0;y<height;y++)
-      {
-	for(x=0;x<width;x++)
-	{
-	  if (XGetPixel(image,x,y) == black_pixel)
-	    data[y * bytes_per_line + x/8] |= (1 << (x%8));
-	}
-      }
-
-      new_pixmap = XCreateBitmapFromData(display,root,data,width,height);
-      free(data);
-
-      if (!new_pixmap)
-	return(GIF_NoMemory);
-    }
-    else
-    {
-      GC gc;
-      XGCValues gcv;
-
-      if (ConvertXImageDepth(display, &image) != GIF_Success)
-	return(GIF_ColorFailed);
-
-      new_pixmap = XCreatePixmap(display,root,width,height,depth);
-
-      if (!new_pixmap)
-	return(GIF_NoMemory);
-
-      gcv.foreground = BlackPixel(display,screen);
-      gcv.background = WhitePixel(display,screen);
-      gc = XCreateGC(display, root, GCForeground | GCBackground, &gcv);
-      XPutImage(display,new_pixmap,gc,image,0,0,0,0,width,height);
-
-      XFreeGC(display, gc);
-    }
-
-    XDestroyImage(image);
-  }
-
-  *pixmap = new_pixmap;
-  return(return_code);
-}
-
-
-/*
- * Read_GIF_to_XImage()  -  based strongly on...
- *
- * xgifload.c  -  based strongly on...
- *
- * gif2ras.c - Converts from a Compuserve GIF (tm) image to a Sun Raster image.
- *
- * Copyright (c) 1988, 1989 by Patrick J. Naughton
- *
- * Author: Patrick J. Naughton
- * naughton@wind.sun.com
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted,
- * provided that the above copyright notice appear in all copies and that
- * both that copyright notice and this permission notice appear in
- * supporting documentation.
- *
- * This file is provided AS IS with no warranties of any kind.  The author
- * shall have no liability with respect to the infringement of copyrights,
- * trade secrets or any patents by this file or any part thereof.  In no
- * event will the author be liable for any lost revenue or profits or
- * other special, indirect and consequential damages.
- *
- */
-
-typedef int boolean;
-typedef unsigned char byte;
-
-static int ReadCode(void);
-static void AddToPixel(byte);
-static int ColorDicking(Display *);
-
-#define NEXTBYTE	(*ptr++)
-#define IMAGESEP	0x2c
-#define INTERLACEMASK	0x40
-#define COLORMAPMASK	0x80
-
-static
-int BitOffset,			/* Bit Offset of next code */
-    XC, YC,			/* Output X and Y coords of current pixel */
-    Pass,			/* Used by output routine if interlaced pic */
-    OutCount,			/* Decompressor output 'stack count' */
-    RWidth, RHeight,		/* screen dimensions */
-    Width, Height,		/* image dimensions */
-    LeftOfs, TopOfs,		/* image offset */
-    BitsPerPixel,		/* Bits per pixel, read from GIF header */
-    BytesPerScanline,		/* bytes per scanline in output raster */
-    ColorMapSize,		/* number of colors */
-    Background,			/* background color */
-    CodeSize,			/* Code size, read from GIF header */
-    InitCodeSize,		/* Starting code size, used during Clear */
-    Code,			/* Value returned by ReadCode */
-    MaxCode,			/* limiting value for current code size */
-    ClearCode,			/* GIF clear code */
-    EOFCode,			/* GIF end-of-information code */
-    CurCode, OldCode, InCode,	/* Decompressor variables */
-    FirstFree,			/* First free code, generated per GIF spec */
-    FreeCode,			/* Decompressor, next free slot in hash table*/
-    FinChar,			/* Decompressor variable */
-    BitMask,			/* AND mask for data size */
-    ReadMask;			/* Code AND mask for current code size */
-
-static boolean Interlace, HasColormap;
-
-static byte *ImageData;		/* The result array */
-static byte *RawGIF;		/* The heap array to hold it, raw */
-static byte *Raster;		/* The raster data stream, unblocked */
-
-/* The color map, read from the GIF header */
-static byte Red[256], Green[256], Blue[256], used[256];
-static int  numused;
-
-extern char *progname;
-
-static int numcols;
-static unsigned long cols[256];
-static XColor defs[256];
-
-int Read_GIF_to_XImage(Display *display, char *filename, XImage **image)
-{
-  int filesize;
-  register byte ch, ch1;
-  register byte *ptr, *ptr1;
-  register int i;
-  int screen = DefaultScreen(display);
-  Visual *visual = DefaultVisual(display,screen);
-  XImage *new_image = NULL;
-  char *id = "GIF87a";
-  FILE *file;
-  int Prefix[4096];	/* The hash table used by the decompressor */
-  int Suffix[4096];
-  int OutCode[1025];	/* An output array used by the decompressor */
-
-  BitOffset = XC = YC = Pass = OutCount = 0;
-  *image = NULL;
-
-  if (strcmp(filename,"-")==0)
-  {
-    file = stdin;
-    filename = "<stdin>";
-  }
-  else
-    file = fopen(filename,"r");
-
-  if (!file)
-    return(GIF_OpenFailed);
-
-  /* find the size of the file */
-  fseek(file, 0L, 2);
-  filesize = ftell(file);
-  fseek(file, 0L, 0);
-
-  if (!(ptr = RawGIF = (byte *) malloc(filesize)))
-    return(GIF_NoMemory);
-
-  if (!(Raster = (byte *) malloc(filesize)))
-    return(GIF_NoMemory);
-
-  if (fread(ptr, filesize, 1, file) != 1)
-    return(GIF_ReadFailed);
-
-  if (strncmp(ptr, id, 6))
-    return(GIF_FileInvalid);
-
-  ptr += 6;
-
-  /* Get variables from the GIF screen descriptor */
-
-  ch = NEXTBYTE;
-  RWidth = ch + 0x100 * NEXTBYTE;    /* screen dimensions... not used. */
-  ch = NEXTBYTE;
-  RHeight = ch + 0x100 * NEXTBYTE;
-
-  ch = NEXTBYTE;
-  HasColormap = ((ch & COLORMAPMASK) ? True : False);
-
-  BitsPerPixel = (ch & 7) + 1;
-  numcols = ColorMapSize = 1 << BitsPerPixel;
-  BitMask = ColorMapSize - 1;
-
-  Background = NEXTBYTE;             /* background color... not used. */
-
-  if (NEXTBYTE)              /* supposed to be NULL */
-    return(GIF_FileInvalid);
-
-  /* Read in global colormap. */
-
-  if (HasColormap)
-  {
-    for (i = 0; i < ColorMapSize; i++)
-    {
-      Red[i] = NEXTBYTE;
-      Green[i] = NEXTBYTE;
-      Blue[i] = NEXTBYTE;
-      used[i] = 0;
-    }
-    numused = 0;
-  }
-  else
-  {
-    /* no colormap in GIF file */
-    fprintf(stderr,"%s:  warning!  no colortable in this file.  Winging it.\n",
-	    progname);
-    if (!numcols)
-      numcols=256;
-    for (i=0; i<numcols; i++)
-      cols[i] = (unsigned long) i;
-  }
-
-  /* Check for image seperator */
-
-  if (NEXTBYTE != IMAGESEP)
-    return(GIF_FileInvalid);
-
-  /* Now read in values from the image descriptor */
-
-  ch = NEXTBYTE;
-  LeftOfs = ch + 0x100 * NEXTBYTE;
-  ch = NEXTBYTE;
-  TopOfs = ch + 0x100 * NEXTBYTE;
-  ch = NEXTBYTE;
-  Width = ch + 0x100 * NEXTBYTE;
-  ch = NEXTBYTE;
-  Height = ch + 0x100 * NEXTBYTE;
-  Interlace = ((NEXTBYTE & INTERLACEMASK) ? True : False);
-
-#ifdef DEBUG_GIF
-  fprintf(stderr, "%s:\n", filename);
-  fprintf(stderr, "   %dx%d, %d bpp / %d colors, %sinterlaced\n",
-	  Width,Height, BitsPerPixel,ColorMapSize,(Interlace ? "" : "non-"));
-  fprintf(stderr, "   Reading file... ");
-#endif
-
-  /* Note that I ignore the possible existence of a local color map.
-   * I'm told there aren't many files around that use them, and the spec
-   * says it's defined for future use.  This could lead to an error
-   * reading some files. 
-   */
-
-  /* Start reading the raster data. First we get the intial code size
-   * and compute decompressor constant values, based on this code size.
-   */
-
-  CodeSize = NEXTBYTE;
-  ClearCode = (1 << CodeSize);
-  EOFCode = ClearCode + 1;
-    FreeCode = FirstFree = ClearCode + 2;
-
-  /* The GIF spec has it that the code size is the code size used to
-   * compute the above values is the code size given in the file, but the
-   * code size used in compression/decompression is the code size given in
-   * the file plus one. (thus the ++).
-   */
-
-  CodeSize++;
-  InitCodeSize = CodeSize;
-  MaxCode = (1 << CodeSize);
-  ReadMask = MaxCode - 1;
-
-  /* Read the raster data.  Here we just transpose it from the GIF array
-   * to the Raster array, turning it from a series of blocks into one long
-   * data stream, which makes life much easier for ReadCode().
-   */
-
-  ptr1 = Raster;
-  do
-  {
-    ch = ch1 = NEXTBYTE;
-    while (ch--) *ptr1++ = NEXTBYTE;
-    if ((Raster - ptr1) > filesize)
-      return(GIF_FileInvalid);
-  }
-  while(ch1);
-
-  free(RawGIF);              /* We're done with the raw data now... */
-
-#ifdef DEBUG_GIF
-  fprintf(stderr, "done\n");
-  fprintf(stderr, "   Decompressing... ");
-#endif
-
-  /* Allocate the X Image */
-  ImageData = (byte *) malloc(Width*Height);
-  if (!ImageData)
-    return(GIF_NoMemory);
-
-  new_image = XCreateImage(display,visual,8,ZPixmap,0,ImageData,
-			   Width,Height,8,Width);
-  if (!new_image)
-    return(GIF_NoMemory);
-
-  BytesPerScanline = Width;
-
-
-  /* Decompress the file, continuing until you see the GIF EOF code.
-   * One obvious enhancement is to add checking for corrupt files here.
-   */
-
-  Code = ReadCode();
-  while (Code != EOFCode)
-  {
-    /* Clear code sets everything back to its initial value, then reads the
-     * immediately subsequent code as uncompressed data.
-     */
-
-    if (Code == ClearCode)
-    {
-      CodeSize = InitCodeSize;
-      MaxCode = (1 << CodeSize);
-      ReadMask = MaxCode - 1;
-      FreeCode = FirstFree;
-      CurCode = OldCode = Code = ReadCode();
-      FinChar = CurCode & BitMask;
-      AddToPixel(FinChar);
-    }
-    else
-    {
-      /* If not a clear code, then must be data:
-       * save same as CurCode and InCode
-       */
-
-      CurCode = InCode = Code;
-
-      /* If greater or equal to FreeCode, not in the hash table yet;
-       * repeat the last character decoded
-       */
-
-      if (CurCode >= FreeCode)
-      {
-	CurCode = OldCode;
-	OutCode[OutCount++] = FinChar;
-      }
-
-      /* Unless this code is raw data, pursue the chain pointed to by CurCode
-       * through the hash table to its end; each code in the chain puts its
-       * associated output code on the output queue.
-       */
-
-      while (CurCode > BitMask)
-      {
-	if (OutCount > 1024)
-	  return(GIF_FileInvalid);
-
-	OutCode[OutCount++] = Suffix[CurCode];
-	CurCode = Prefix[CurCode];
-      }
-
-      /* The last code in the chain is treated as raw data. */
-
-      FinChar = CurCode & BitMask;
-      OutCode[OutCount++] = FinChar;
-
-      /* Now we put the data out to the Output routine.
-       * It's been stacked LIFO, so deal with it that way...
-       */
-
-      for (i = OutCount - 1; i >= 0; i--)
-	AddToPixel(OutCode[i]);
-      OutCount = 0;
-
-      /* Build the hash table on-the-fly. No table is stored in the file. */
-
-      Prefix[FreeCode] = OldCode;
-      Suffix[FreeCode] = FinChar;
-      OldCode = InCode;
-
-      /* Point to the next slot in the table.  If we exceed the current
-       * MaxCode value, increment the code size unless it's already 12.  If it
-       * is, do nothing: the next code decompressed better be CLEAR
-       */
-
-      FreeCode++;
-      if (FreeCode >= MaxCode)
-      {
-	if (CodeSize < 12)
-	{
-	  CodeSize++;
-	  MaxCode *= 2;
-	  ReadMask = (1 << CodeSize) - 1;
-	}
-      }
-    }
-    Code = ReadCode();
-  }
-
-  free(Raster);
-
-#ifdef DEBUG_GIF
-  fprintf(stderr, "done\n");
-  fprintf(stderr,"   %d colors used\n",numused);
-#endif
-
-  if (file != stdin)
-    fclose(file);
-
-  if (ColorDicking(display) != GIF_Success)
-    return(GIF_ColorFailed);
-
-  *image = new_image;
-  return(GIF_Success);
-}
-
-
-/* Fetch the next code from the raster data stream.  The codes can be
- * any length from 3 to 12 bits, packed into 8-bit bytes, so we have to
- * maintain our location in the Raster array as a BIT Offset.  We compute
- * the byte Offset into the raster array by dividing this by 8, pick up
- * three bytes, compute the bit Offset into our 24-bit chunk, shift to
- * bring the desired code to the bottom, then mask it off and return it. 
- */
-
-static int ReadCode()
-{
-  int RawCode, ByteOffset;
-
-  ByteOffset = BitOffset / 8;
-  RawCode = Raster[ByteOffset] + (0x100 * Raster[ByteOffset + 1]);
-  if (CodeSize >= 8)
-    RawCode += (0x10000 * Raster[ByteOffset + 2]);
-  RawCode >>= (BitOffset % 8);
-  BitOffset += CodeSize;
-  return(RawCode & ReadMask);
-}
-
-
-static void AddToPixel(byte Index)
-{
-  if (YC<Height)
-    *(ImageData + YC * BytesPerScanline + XC) = Index;
-
-  if (!used[Index])
-  {
-    used[Index]=1;
-    numused++;
-  }
-
-  /* Update the X-coordinate, and if it overflows, update the Y-coordinate */
-
-  if (++XC == Width)
-  {
-    /* If a non-interlaced picture, just increment YC to the next scan line. 
-     * If it's interlaced, deal with the interlace as described in the GIF
-     * spec.  Put the decoded scan line out to the screen if we haven't gone
-     * past the bottom of it
-     */
-
-    XC = 0;
-    if (!Interlace)
-      YC++;
-    else
-    {
-      switch (Pass)
-      {
-	case 0:
-	  YC += 8;
-	  if (YC >= Height)
-	  {
-	    Pass++;
-	    YC = 4;
-	  }
-	  break;
-
-	case 1:
-	  YC += 8;
-	  if (YC >= Height)
-	  {
-	    Pass++;
-	    YC = 2;
-	  }
-	  break;
-
-	case 2:
-	  YC += 4;
-	  if (YC >= Height)
-	  {
-	    Pass++;
-	    YC = 1;
-	  }
-	  break;
-
-	case 3:
-	  YC += 2;
-	  break;
-
-	default:
-	  break;
-	}
-    }
-  }
-}
-
-
-static int ColorDicking(Display *display)
-{
-  /* we've got the picture loaded, we know what colors are needed. get 'em */
-
-  register int i,j;
-  static byte lmasks[8] = {0xff, 0xfe, 0xfc, 0xf8, 0xf0, 0xe0, 0xc0, 0x80};
-  byte lmask, *ptr;
-  int screen = DefaultScreen(display);
-  Colormap cmap = DefaultColormap(display,screen);
-  int dispcells = DisplayCells(display,screen);
-
-  int strip = 0;
-  int nostrip = 0; 
-
-  if (!HasColormap)
-    return(GIF_Success);
-  /* no need to allocate any colors if no colormap in GIF file */
-
-  /* Allocate the X colors for this picture */
-
-  if (nostrip)
-  {
-    /* nostrip was set.  try REAL hard to do it */
-    for (i=j=0; i<numcols; i++)
-    {
-      if (used[i])
-      {
-	defs[i].red   = Red[i]<<8;
-	defs[i].green = Green[i]<<8;
-	defs[i].blue  = Blue[i]<<8;
-	defs[i].flags = DoRed | DoGreen | DoBlue;
-	if (!XAllocColor(display,cmap,&defs[i]))
-	{ 
-	  j++;
-	  defs[i].pixel = 0xffff;
-	}
-	cols[i] = defs[i].pixel;
-      }
-    }
-
-    if (j)
-    {
-      /* failed to pull it off */
-
-      XColor ctab[256];
-      int dc;
-
-      dc = (dispcells<256) ? dispcells : 256;
-
-      fprintf(stderr,
-	      "failed to allocate %d out of %d colors.  Trying extra hard.\n",
-	      j,numused);
-
-      /* read in the color table */
-      for (i=0; i<dc; i++)
-	ctab[i].pixel = i;
-      XQueryColors(display,cmap,ctab,dc);
-                
-      /* run through the used colors.  any used color that has a pixel
-	 value of 0xffff wasn't allocated.  for such colors, run through
-	 the entire X colormap and pick the closest color */
-
-      for (i=0; i<numcols; i++)
-	if (used[i] && cols[i]==0xffff)
-	{
-	  /* an unallocated pixel */
-
-	  int d, mdist, close;
-	  unsigned long r,g,b;
-
-	  mdist = 100000;   close = -1;
-	  r =  Red[i];
-	  g =  Green[i];
-	  b =  Blue[i];
-	  for (j=0; j<dc; j++)
-	  {
-	    d = abs(r - (ctab[j].red>>8)) +
-	      abs(g - (ctab[j].green>>8)) +
-		abs(b - (ctab[j].blue>>8));
-	    if (d<mdist)
-	    {
-	      mdist=d;
-	      close=j;
-	    }
-	  }
-
-	  if (close<0)
-	    return(GIF_ColorFailed);
-
-	  bcopy(&defs[close],&defs[i],sizeof(XColor));
-	  cols[i] = ctab[close].pixel;
-	}
-    }  /* end 'failed to pull it off' */
-  }
-  else
-  {
-    /* strip wasn't set, do the best auto-strip */
-
-    j = 0;
-    while (strip<8)
-    {
-      lmask = lmasks[strip];
-      for (i=0; i<numcols; i++)
-      {
-	if (used[i])
-	{
-	  defs[i].red   = (Red[i]  &lmask)<<8;
-	  defs[i].green = (Green[i]&lmask)<<8;
-	  defs[i].blue  = (Blue[i] &lmask)<<8;
-	  defs[i].flags = DoRed | DoGreen | DoBlue;
-	  if (!XAllocColor(display,cmap,&defs[i]))
-	    break;
-	  cols[i] = defs[i].pixel;
-	}
-      }
-
-      if (i<numcols)
-      {
-	/* failed */
-	strip++;
-	j++;
-	for (i--; i>=0; i--)
-	  if (used[i])
-	    XFreeColors(display,cmap,cols+i,1,0L);
-      }
-      else
-	break;
-    }
-
-#ifdef DEBUG_GIF
-    if (j && strip<8)
-      fprintf(stderr,"%s: stripped %d bits\n",progname,strip);
-#endif
-
-    if (strip==8)
-    {
-      fprintf(stderr,"UTTERLY failed to allocate the desired colors.\n");
-      for (i=0; i<numcols; i++) cols[i]=i;
-    }
-  }
-
-  ptr = ImageData;
-  for (i=0; i<Height; i++)
-    for (j=0; j<Width; j++,ptr++) 
-      *ptr = (byte) cols[*ptr];
-
-  return(GIF_Success);
-}
-
-
-/******************************************************************************
- *  This makes sure the display's depth is the same as the
- * depth of the default 8 bit image.  If not, we build a new image
- * that has the correct depth.  This works on the fact that
- * the color mapper has already changed every pixel value in the
- * image into the proper number of bits (to fit into the pallet)
- * so we can just chop down the number of bits.
- *   This changes the global variable 'expImage' if necessary.
- */
-
-static int ConvertXImageDepth(Display *display, XImage **image)
-{
-  int screen = DefaultScreen(display);
-  int depth = DefaultDepth(display, screen);
-
-
-
-
-
-
-  printf("ConvertXImageDepth:\n");
-  printf("(*image)->depth == %d\n",
-	 (*image)->depth);
-  printf("DefaultDepth(display, screen) == %d\n",
-	 DefaultDepth(display, screen));
-
-
-
-
-  if ((*image)->depth != depth)
-  {
-    XImage *old_image, *new_image;
-
-    Visual *visual = DefaultVisual(display,screen);
-
-    int width = (*image)->width;
-    int height = (*image)->height;
-    register int dwx, dwy;
-    byte *data;
-
-
-
-
-
-    printf("ConvertXImageDepth: ---------> CONVERTING...\n");
-
-
-
-
-
-
-    data = (byte *)malloc(width * height * depth);
-    old_image = *image;
-
-#if 1
-    new_image = XCreateImage(display,visual,depth,
-			     ZPixmap,0,data,width,height,8,0);
-#else
-    new_image = XGetImage(display,RootWindow(display,screen),
-			  0,0,width,height,0xffffffff,ZPixmap);
-#endif
-
-    if (!new_image)
-      return(GIF_NoMemory);
-
-    if (old_image->depth == 8 && new_image->depth == 4)
-    {
-      /* speedup for the most common format change */
-
-      register byte *sptr = (byte *)old_image->data;
-      register byte *dptr = (byte *)new_image->data;
-
-      for (dwy=1; dwy<=height; dwy++)
-      {
-	for (dwx=1; dwx<width; dwx+=2)
-	{
-	  *dptr = (*sptr) | (*(sptr+1)<<4);
-	  dptr++;
-	  sptr+=2;
-	}
-	if (width & 1)
-	{
-	  /* if extra pixal at end of line, just move it */
-	  *dptr = *sptr;
-	  sptr++; dptr++;
-	}
-      }
-    }
-    else	/* other format change than 8 bit -> 4 bit */
-    {
-      unsigned long pixel_value;
-
-      for (dwx=0; dwx<width; dwx++)
-      {
-	for (dwy=0; dwy<height; dwy++)
-	{
-	  pixel_value = XGetPixel(old_image, dwx, dwy);
-
-	  if (pixel_value > 0xff)
-	    printf("pixel = %lx", pixel_value);
-
-	  XPutPixel(new_image, dwx, dwy, pixel_value);
-	}
-      }
-    }
-
-    free(old_image->data);
-    old_image->data = NULL;
-    XDestroyImage(old_image);
-
-    *image = new_image;
-  }
-
-  return(GIF_Success);
-}
-
-
-static unsigned long be2long(unsigned char *be) /* big-endian -> long int */
-{
-  return((be[0]<<24) | (be[1]<<16) | (be[2]<<8) | be[3]);
-}
-
-static unsigned short be2short(unsigned char *be) /* big-endian -> short int */
-{
-  return((be[0]<<8) | be[1]);
-}
-
-static struct IFF_ILBM_BMHD *ConvertBMHD(unsigned char *header_data)
-{
-  struct IFF_ILBM_BMHD_big_endian *bmhd_be;
-  struct IFF_ILBM_BMHD *bmhd;
-
-  bmhd_be = (struct IFF_ILBM_BMHD_big_endian *)header_data;
-  bmhd = (struct IFF_ILBM_BMHD *)malloc(sizeof(struct IFF_ILBM_BMHD));
-  if (!bmhd)
-    return(NULL);
-
-  bmhd->Width = be2short(bmhd_be->Width);
-  bmhd->Height = be2short(bmhd_be->Height);
-  bmhd->LeftEdge = be2short(bmhd_be->LeftEdge);
-  bmhd->TopEdge = be2short(bmhd_be->TopEdge);
-  bmhd->Depth = (int)bmhd_be->Depth;
-  bmhd->Mask = (int)bmhd_be->Mask;
-  bmhd->Compression = (int)bmhd_be->Compression;
-  bmhd->pad1 = bmhd_be->pad1;
-  bmhd->transparentColor = be2short(bmhd_be->transparentColor);
-  bmhd->xAspect = (int)bmhd_be->xAspect;
-  bmhd->yAspect = (int)bmhd_be->yAspect;
-  bmhd->pageWidth = be2short(bmhd_be->pageWidth);
-  bmhd->pageHeight = be2short(bmhd_be->pageHeight);
-
-  return(bmhd);
-}
-
-static unsigned char MSBitFirst2LSBitFirst(unsigned char msb_byte)
-{
-  unsigned char lsb_byte = 0;
-  int i;
-
-  for(i=7;i>=0;i--)
-  {
-    lsb_byte |= (msb_byte & 1) << i;
-    msb_byte >>= 1;
-  }
-
-  return(lsb_byte);
-}
-
-int Read_ILBM_to_Bitmap(Display *display, char *filename, Pixmap *pixmap)
-{
-  Pixmap new_pixmap = 0;
-  int screen = DefaultScreen(display);
-  Drawable root = RootWindow(display,screen);
-  struct IFF_ILBM_FORM_big_endian *form_header;
-  struct IFF_ILBM_BMHD *bitmap_header;
-  unsigned long file_len, body_len;
-  unsigned char *file_data, *bitmap_data;
-  unsigned char *file_ptr, *bitmap_ptr, *body_ptr;
-  unsigned char byte_count, byte_value;
-  int i,x,y,z;
-  int width, height, depth;
-  int bytes_per_line, bitmap_size;
-  FILE *file;
-
-  if (!(file = fopen(filename,"r")))
-    return(ILBM_OpenFailed);
-
-  if (fseek(file,0,SEEK_END) < 0)
-  {
-    fclose(file);
-    return(ILBM_ReadFailed);
-  }
-
-  file_len = ftell(file);
-  rewind(file);
-
-  if (!(file_data = (unsigned char *)malloc(file_len)))
-  {
-    fclose(file);
-    return(ILBM_NoMemory);
-  }
-
-  if (fread(file_data,1,file_len,file) != file_len)
-  {
-    free(file_data);
-    fclose(file);
-    return(ILBM_ReadFailed);
-  }
-
-  fclose(file);
-
-  form_header = (struct IFF_ILBM_FORM_big_endian *)file_data;
-
-  if (strncmp(form_header->magic_FORM,"FORM",4) ||
-      file_len != be2long(form_header->chunk_size)+8 ||
-      strncmp(form_header->magic_ILBM,"ILBM",4))
-  {
-#ifdef DEBUG_ILBM
-      printf("%s: IFF chunk 'FORM' and/or 'ILBM' not found.\n",filename);
-#endif
-    free(file_data);
-    return(ILBM_FileInvalid);
-  }
-
-  bitmap_header = NULL;
-  body_ptr = NULL;
-  file_ptr = file_data + 12;
-
-  while(file_ptr < (unsigned char *)(file_data + file_len))
-  {
-    if (!strncmp(file_ptr,"BMHD",4))
-    {
-#ifdef DEBUG_ILBM
-      printf("%s: IFF chunk 'BMHD' found.\n",filename);
-#endif
-      bitmap_header = ConvertBMHD(file_ptr + 8);
-      file_ptr += be2long(file_ptr + 4) + 8;
-      continue;
-    }
-    else if (!strncmp(file_ptr,"BODY",4))
-    {
-#ifdef DEBUG_ILBM
-      printf("%s: IFF chunk 'BODY' found.\n",filename);
-#endif
-      body_ptr = file_ptr + 8;
-      body_len = be2long(file_ptr + 4);
-      file_ptr += be2long(file_ptr + 4) + 8;
-      continue;
-    }
-    else
-    {
-#ifdef DEBUG_ILBM
-      printf("%s: IFF chunk '%c%c%c%c' found (but not used).\n",filename,
-	     file_ptr[0],file_ptr[1],file_ptr[2],file_ptr[3]);
-#endif
-      /* other chunk not recognized here */
-      file_ptr += be2long(file_ptr + 4) + 8;
-      continue;
-    }
-  }
-
-  if (!bitmap_header || !body_ptr)
-  {
-#ifdef DEBUG_ILBM
-      printf("%s: IFF chunk 'BMHD' and/or 'BODY' not found.\n",filename);
-#endif
-    free(file_data);
-    return(ILBM_FileInvalid);
-  }
-
-  width = bitmap_header->Width;
-  height = bitmap_header->Height;
-  depth = bitmap_header->Depth;
-
-#ifdef DEBUG_ILBM
-  if (depth > 1)
-    printf("%s: %d bitplanes found; using only the first plane.\n",
-	   filename,depth);
-#endif
-
-  bytes_per_line = ((width + 15) / 16) * 2;
-  bitmap_size = bytes_per_line * height;
-
-  bitmap_data = (char *)malloc(bitmap_size);
-  if (!bitmap_data)
-  {
-    free(file_data);
-    free(bitmap_header);
-    return(ILBM_NoMemory);
-  }
-
-  bitmap_ptr = bitmap_data;
-  for(i=0;i<bitmap_size;i++)
-    *bitmap_ptr++ = 0;
-
-  for(y=0;y<height;y++)
-  {
-    /* we only read the first bitplane here to create a black/white bitmap */
-
-    for(z=0;z<depth;z++)
-    {
-      bitmap_ptr = bitmap_data + y * bytes_per_line;
-      x = 0;
-
-      if (!bitmap_header->Compression)
-      {
-	while(x++ < bytes_per_line)
-	  *bitmap_ptr++ |= MSBitFirst2LSBitFirst(*body_ptr++);
-      }
-      else
-      {
-	while(x < bytes_per_line)
-	{
-	  byte_count = *body_ptr++;
-
-	  if (byte_count <= 128)
-	  {
-	    for(i=0;i<byte_count+1;i++)
-	      *bitmap_ptr++ |= MSBitFirst2LSBitFirst(*body_ptr++);
-	    x += byte_count + 1;
-	  }
-	  else
-	  {
-	    byte_value = *body_ptr++;
-	    for(i=0;i<257-byte_count;i++)
-	      *bitmap_ptr++ |= MSBitFirst2LSBitFirst(byte_value);
-	    x += 257 - byte_count;
-	  }
-	}
-      }
-    }
-  }
-
-  bitmap_ptr = bitmap_data;
-  for(i=0;i<bitmap_size;i++)
-    *bitmap_ptr++ ^= 0xff;
-
-  new_pixmap = XCreateBitmapFromData(display,root,bitmap_data,width,height);
-
-  free(file_data);
-  free(bitmap_data);
-  free(bitmap_header);
-
-  if (!new_pixmap)
-    return(ILBM_NoMemory);
-
-  *pixmap = new_pixmap;
-  return(ILBM_Success);
-}
-#endif