changelog.txt

It was built with libpng version 1.2.35, and is running with libpng version 1.2.35

      info_ptr->gamma = png_ptr->gamma;
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
      info_ptr->int_gamma = png_ptr->int_gamma;
#endif
   }
#endif

#if defined(PNG_READ_16_TO_8_SUPPORTED)
   if ((png_ptr->transformations & PNG_16_TO_8) && (info_ptr->bit_depth == 16))
      info_ptr->bit_depth = 8;
#endif

#if defined(PNG_READ_DITHER_SUPPORTED)
   if (png_ptr->transformations & PNG_DITHER)
   {
      if (((info_ptr->color_type == PNG_COLOR_TYPE_RGB) ||
         (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)) &&
         png_ptr->palette_lookup && info_ptr->bit_depth == 8)
      {
         info_ptr->color_type = PNG_COLOR_TYPE_PALETTE;
      }
   }
#endif

#if defined(PNG_READ_PACK_SUPPORTED)
   if ((png_ptr->transformations & PNG_PACK) && (info_ptr->bit_depth < 8))
      info_ptr->bit_depth = 8;
#endif

#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
   if (png_ptr->transformations & PNG_GRAY_TO_RGB)
      info_ptr->color_type |= PNG_COLOR_MASK_COLOR;
#endif

#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
   if (png_ptr->transformations & PNG_RGB_TO_GRAY)
      info_ptr->color_type &= ~PNG_COLOR_MASK_COLOR;
#endif

   if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
      info_ptr->channels = 1;
   else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
      info_ptr->channels = 3;
   else
      info_ptr->channels = 1;

#ifndef PNG_FLAG_ADD_ALPHA
#define PNG_FLAG_ADD_ALPHA          0x200000L  /* Added to libpng-1.2.8 */
#endif
#ifndef PNG_FLAG_STRIP_ALPHA
#define PNG_FLAG_STRIP_ALPHA        0x400000L  /* Added to libpng-1.2.8 */
#endif
#ifndef PNG_ADD_ALPHA
#define PNG_ADD_ALPHA       0x1000000L  /* Added to libpng-1.2.7 */
#endif

#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
   if (png_ptr->flags & PNG_FLAG_STRIP_ALPHA)
      info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA;
#endif

   if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
      info_ptr->channels++;

#if defined(PNG_READ_FILLER_SUPPORTED)
   /* STRIP_ALPHA and FILLER allowed:  MASK_ALPHA bit stripped above */
   if ((png_ptr->transformations & PNG_FILLER) &&
       ((info_ptr->color_type == PNG_COLOR_TYPE_RGB) ||
       (info_ptr->color_type == PNG_COLOR_TYPE_GRAY)))
   {
      info_ptr->channels++;
      /* if adding a true alpha channel not just filler */
#if !defined(PNG_1_0_X)
      if (png_ptr->transformations & PNG_ADD_ALPHA)
        info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
#endif
   }
#endif

#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) && \
defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
   if(png_ptr->transformations & PNG_USER_TRANSFORM)
     {
       if(info_ptr->bit_depth < png_ptr->user_transform_depth)
         info_ptr->bit_depth = png_ptr->user_transform_depth;
       if(info_ptr->channels < png_ptr->user_transform_channels)
         info_ptr->channels = png_ptr->user_transform_channels;
     }
#endif

   info_ptr->pixel_depth = (png_byte)(info_ptr->channels *
      info_ptr->bit_depth);

#ifndef PNG_ROWBYTES
/* Added to libpng-1.2.6 JB */
#define PNG_ROWBYTES(pixel_bits, width) \
    ((pixel_bits) >= 8 ? \
    ((width) * (((png_uint_32)(pixel_bits)) >> 3)) : \
    (( ((width) * ((png_uint_32)(pixel_bits))) + 7) >> 3) )
#endif
   info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,info_ptr->width);

#if !defined(PNG_READ_EXPAND_SUPPORTED)
   if(png_ptr)
      return;
#endif
}

#if !defined(PNG_NO_STDIO)
/* This is the function that does the actual reading of data.  If you are
   not reading from a standard C stream, you should create a replacement
   read_data function and use it at run time with png_set_read_fn(), rather
   than changing the library. */
#ifndef USE_FAR_KEYWORD
void PNGAPI
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
   png_size_t check;

   /* fread() returns 0 on error, so it is OK to store this in a png_size_t
    * instead of an int, which is what fread() actually returns.
    */
#if defined(_WIN32_WCE)
   if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
      check = 0;
#else
   check = (png_size_t)fread(data, (png_size_t)1, length,
      (png_FILE_p)png_ptr->io_ptr);
#endif

   if (check != length)
      png_error(png_ptr, "Read Error");
}
#else
/* this is the model-independent version. Since the standard I/O library
   can't handle far buffers in the medium and small models, we have to copy
   the data.
*/

#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)

static void /* PRIVATE */
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
   int check;
   png_byte *n_data;
   png_FILE_p io_ptr;

   /* Check if data really is near. If so, use usual code. */
   n_data = (png_byte *)CVT_PTR_NOCHECK(data);
   io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
   if ((png_bytep)n_data == data)
   {
#if defined(_WIN32_WCE)
      if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
         check = 0;
#else
      check = fread(n_data, 1, length, io_ptr);
#endif
   }
   else
   {
      png_byte buf[NEAR_BUF_SIZE];
      png_size_t read, remaining, err;
      check = 0;
      remaining = length;
      do
      {
         read = MIN(NEAR_BUF_SIZE, remaining);
#if defined(_WIN32_WCE)
         if ( !ReadFile((HANDLE)(io_ptr), buf, read, &err, NULL) )
            err = 0;
#else
         err = fread(buf, (png_size_t)1, read, io_ptr);
#endif
         png_memcpy(data, buf, read); /* copy far buffer to near buffer */
         if(err != read)
            break;
         else
            check += err;
         data += read;
         remaining -= read;
      }
      while (remaining != 0);
   }
   if ((png_uint_32)check != (png_uint_32)length)
      png_error(png_ptr, "read Error");
}
#endif
#endif
#if !defined(PNG_NO_STDIO)
/* This is the function that does the actual writing of data.  If you are
   not writing to a standard C stream, you should create a replacement
   write_data function and use it at run time with png_set_write_fn(), rather
   than changing the library. */
#ifndef USE_FAR_KEYWORD
void PNGAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
   png_uint_32 check;

#if defined(_WIN32_WCE)
   if ( !WriteFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
      check = 0;
#else
   check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr));
#endif
   if (check != length)
      png_error(png_ptr, "Write Error");
}
#else
/* this is the model-independent version. Since the standard I/O library
   can't handle far buffers in the medium and small models, we have to copy
   the data.
*/

#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)

void PNGAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
   png_uint_32 check;
   png_byte *near_data;  /* Needs to be "png_byte *" instead of "png_bytep" */
   png_FILE_p io_ptr;

   /* Check if data really is near. If so, use usual code. */
   near_data = (png_byte *)CVT_PTR_NOCHECK(data);
   io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
   if ((png_bytep)near_data == data)
   {
#if defined(_WIN32_WCE)
      if ( !WriteFile(io_ptr, near_data, length, &check, NULL) )
         check = 0;
#else
      check = fwrite(near_data, 1, length, io_ptr);
#endif
   }
   else
   {
      png_byte buf[NEAR_BUF_SIZE];
      png_size_t written, remaining, err;
      check = 0;
      remaining = length;
      do
      {
         written = MIN(NEAR_BUF_SIZE, remaining);
         png_memcpy(buf, data, written); /* copy far buffer to near buffer */
#if defined(_WIN32_WCE)
         if ( !WriteFile(io_ptr, buf, written, &err, NULL) )
            err = 0;
#else
         err = fwrite(buf, 1, written, io_ptr);
#endif
         if (err != written)
            break;
         else
            check += err;
         data += written;
         remaining -= written;
      }
      while (remaining != 0);
   }
   if (check != length)
      png_error(png_ptr, "Write Error");
}

#endif
#endif

#endif /* !defined(PNGCRUSH_H) */



/* cexcept interface */

static void png_cexcept_error(png_structp png_ptr, png_const_charp err_msg)
{
    if (png_ptr);
#if (defined(PNGCRUSH_H))
    if (!strcmp(err_msg, "Too many IDAT's found")) {
#ifndef PNG_NO_CONSOLE_IO
        fprintf(stderr, "\nIn %s, correcting ", inname);
#else
        png_warning(png_ptr, err_msg);
#endif
    } else
#endif /* defined(PNGCRUSH_H) */
    {
        Throw err_msg;
    }
}




/* START of code to validate memory allocation and deallocation */
#ifdef PNG_USER_MEM_SUPPORTED

/* Allocate memory.  For reasonable files, size should never exceed
   64K.  However, zlib may allocate more then 64K if you don't tell
   it not to.  See zconf.h and png.h for more information.  zlib does
   need to allocate exactly 64K, so whatever you call here must
   have the ability to do that.

   This piece of code can be compiled to validate max 64K allocations
   by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K. */
typedef struct memory_information {
    png_uint_32 size;
    png_voidp pointer;
    struct memory_information FAR *next;
} memory_information;
typedef memory_information FAR *memory_infop;

static memory_infop pinformation = NULL;
static int current_allocation = 0;
static int maximum_allocation = 0;




png_voidp png_debug_malloc(png_structp png_ptr, png_uint_32 size)
{

    /* png_malloc has already tested for NULL; png_create_struct calls
       png_debug_malloc directly (with png_ptr == NULL prior to libpng-1.2.0
       which is OK since we are not using a user mem_ptr) */

    if (size == 0)
        return (png_voidp) (NULL);

    /* This calls the library allocator twice, once to get the requested
       buffer and once to get a new free list entry. */
    {
        memory_infop pinfo = (memory_infop)png_malloc_default(png_ptr,
           sizeof *pinfo);
        pinfo->size = size;
        current_allocation += size;
        if (current_allocation > maximum_allocation)
            maximum_allocation = current_allocation;
        pinfo->pointer = png_malloc_default(png_ptr, size);
        pinfo->next = pinformation;
        pinformation = pinfo;
        /* Make sure the caller isn't assuming zeroed memory. */
        png_memset(pinfo->pointer, 0xdd, pinfo->size);
        if (verbose > 2)
            fprintf(STDERR, "Pointer %lux allocated %lu bytes\n",
                    (unsigned long) pinfo->pointer, (unsigned long)size);
        return (png_voidp) (pinfo->pointer);
    }
}




/* Free a pointer.  It is removed from the list at the same time. */
void png_debug_free(png_structp png_ptr, png_voidp ptr)
{
    if (png_ptr == NULL)
        fprintf(STDERR, "NULL pointer to png_debug_free.\n");
    if (ptr == 0) {
#if 0 /* This happens all the time. */
        fprintf(STDERR, "WARNING: freeing NULL pointer\n");
#endif
        return;
    }

    /* Unlink the element from the list. */
    {
        memory_infop FAR *ppinfo = &pinformation;
        for (;;) {
            memory_infop pinfo = *ppinfo;
            if (pinfo->pointer == ptr) {
                *ppinfo = pinfo->next;
                current_allocation -= pinfo->size;
                if (current_allocation < 0)
                    fprintf(STDERR, "Duplicate free of memory\n");
                /* We must free the list element too, but first kill
                   the memory that is to be freed. */
                memset(ptr, 0x55, pinfo->size);
                if (verbose > 2)
                    fprintf(STDERR, "Pointer %lux freed %lu bytes\n",
                            (unsigned long) ptr, (unsigned long)pinfo->size);
                png_free_default(png_ptr, pinfo);
                break;
            }
            if (pinfo->next == NULL) {
                fprintf(STDERR, "Pointer %lux not found\n",
                    (unsigned long) ptr);