X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=libraries%2Flibpng-1.2.0%2Fpng.c;fp=libraries%2Flibpng-1.2.0%2Fpng.c;h=0000000000000000000000000000000000000000;hp=8b56feed3b25cf08ce1ab4a36b2b889aec649caa;hb=5d405fd05bbfbbd94a7c6cbd876e6634025c1c25;hpb=bab0189ee9d56aca8bea909275317ab4e0be09ee

diff --git a/libraries/libpng-1.2.0/png.c b/libraries/libpng-1.2.0/png.c
deleted file mode 100644
index 8b56fee..0000000
--- a/libraries/libpng-1.2.0/png.c
+++ /dev/null
@@ -1,778 +0,0 @@
-
-/* png.c - location for general purpose libpng functions
- *
- * libpng version 1.2.0 - September 1, 2001
- * Copyright (c) 1998-2001 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- */
-
-#define PNG_INTERNAL
-#define PNG_NO_EXTERN
-#include "png.h"
-
-/* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_0 Your_png_h_is_not_version_1_2_0;
-
-/* Version information for C files.  This had better match the version
- * string defined in png.h.  */
-
-#ifdef PNG_USE_GLOBAL_ARRAYS
-/* png_libpng_ver was changed to a function in version 1.0.5c */
-const char png_libpng_ver[18] = "1.2.0";
-
-/* png_sig was changed to a function in version 1.0.5c */
-/* Place to hold the signature string for a PNG file. */
-const png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
-
-/* Invoke global declarations for constant strings for known chunk types */
-PNG_IHDR;
-PNG_IDAT;
-PNG_IEND;
-PNG_PLTE;
-PNG_bKGD;
-PNG_cHRM;
-PNG_gAMA;
-PNG_hIST;
-PNG_iCCP;
-PNG_iTXt;
-PNG_oFFs;
-PNG_pCAL;
-PNG_sCAL;
-PNG_pHYs;
-PNG_sBIT;
-PNG_sPLT;
-PNG_sRGB;
-PNG_tEXt;
-PNG_tIME;
-PNG_tRNS;
-PNG_zTXt;
-
-/* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
-
-/* start of interlace block */
-const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
-
-/* offset to next interlace block */
-const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
-
-/* start of interlace block in the y direction */
-const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
-
-/* offset to next interlace block in the y direction */
-const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
-
-/* width of interlace block (used in assembler routines only) */
-#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
-const int FARDATA png_pass_width[] = {8, 4, 4, 2, 2, 1, 1};
-#endif
-
-/* Height of interlace block.  This is not currently used - if you need
- * it, uncomment it here and in png.h
-const int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
-*/
-
-/* Mask to determine which pixels are valid in a pass */
-const int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
-
-/* Mask to determine which pixels to overwrite while displaying */
-const int FARDATA png_pass_dsp_mask[]
-   = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
-
-#endif
-
-/* Tells libpng that we have already handled the first "num_bytes" bytes
- * of the PNG file signature.  If the PNG data is embedded into another
- * stream we can set num_bytes = 8 so that libpng will not attempt to read
- * or write any of the magic bytes before it starts on the IHDR.
- */
-
-void PNGAPI
-png_set_sig_bytes(png_structp png_ptr, int num_bytes)
-{
-   png_debug(1, "in png_set_sig_bytes\n");
-   if (num_bytes > 8)
-      png_error(png_ptr, "Too many bytes for PNG signature.");
-
-   png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes);
-}
-
-/* Checks whether the supplied bytes match the PNG signature.  We allow
- * checking less than the full 8-byte signature so that those apps that
- * already read the first few bytes of a file to determine the file type
- * can simply check the remaining bytes for extra assurance.  Returns
- * an integer less than, equal to, or greater than zero if sig is found,
- * respectively, to be less than, to match, or be greater than the correct
- * PNG signature (this is the same behaviour as strcmp, memcmp, etc).
- */
-int PNGAPI
-png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
-{
-   png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
-   if (num_to_check > 8)
-      num_to_check = 8;
-   else if (num_to_check < 1)
-      return (0);
-
-   if (start > 7)
-      return (0);
-
-   if (start + num_to_check > 8)
-      num_to_check = 8 - start;
-
-   return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check)));
-}
-
-/* (Obsolete) function to check signature bytes.  It does not allow one
- * to check a partial signature.  This function might be removed in the
- * future - use png_sig_cmp().  Returns true (nonzero) if the file is a PNG.
- */
-int PNGAPI
-png_check_sig(png_bytep sig, int num)
-{
-  return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num));
-}
-
-/* Function to allocate memory for zlib and clear it to 0. */
-voidpf /* PRIVATE */
-png_zalloc(voidpf png_ptr, uInt items, uInt size)
-{
-   png_uint_32 num_bytes = (png_uint_32)items * size;
-   png_voidp ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes);
-
-#ifndef PNG_NO_ZALLOC_ZERO
-   if (num_bytes > (png_uint_32)0x8000L)
-   {
-      png_memset(ptr, 0, (png_size_t)0x8000L);
-      png_memset((png_bytep)ptr + (png_size_t)0x8000L, 0,
-         (png_size_t)(num_bytes - (png_uint_32)0x8000L));
-   }
-   else
-   {
-      png_memset(ptr, 0, (png_size_t)num_bytes);
-   }
-#endif
-   return ((voidpf)ptr);
-}
-
-/* function to free memory for zlib */
-void /* PRIVATE */
-png_zfree(voidpf png_ptr, voidpf ptr)
-{
-   png_free((png_structp)png_ptr, (png_voidp)ptr);
-}
-
-/* Reset the CRC variable to 32 bits of 1's.  Care must be taken
- * in case CRC is > 32 bits to leave the top bits 0.
- */
-void /* PRIVATE */
-png_reset_crc(png_structp png_ptr)
-{
-   png_ptr->crc = crc32(0, Z_NULL, 0);
-}
-
-/* Calculate the CRC over a section of data.  We can only pass as
- * much data to this routine as the largest single buffer size.  We
- * also check that this data will actually be used before going to the
- * trouble of calculating it.
- */
-void /* PRIVATE */
-png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length)
-{
-   int need_crc = 1;
-
-   if (png_ptr->chunk_name[0] & 0x20)                     /* ancillary */
-   {
-      if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
-          (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
-         need_crc = 0;
-   }
-   else                                                    /* critical */
-   {
-      if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
-         need_crc = 0;
-   }
-
-   if (need_crc)
-      png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length);
-}
-
-/* Allocate the memory for an info_struct for the application.  We don't
- * really need the png_ptr, but it could potentially be useful in the
- * future.  This should be used in favour of malloc(sizeof(png_info))
- * and png_info_init() so that applications that want to use a shared
- * libpng don't have to be recompiled if png_info changes size.
- */
-png_infop PNGAPI
-png_create_info_struct(png_structp png_ptr)
-{
-   png_infop info_ptr;
-
-   png_debug(1, "in png_create_info_struct\n");
-   if(png_ptr == NULL) return (NULL);
-#ifdef PNG_USER_MEM_SUPPORTED
-   if ((info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
-      png_ptr->malloc_fn, png_ptr->mem_ptr)) != NULL)
-#else
-   if ((info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO)) != NULL)
-#endif
-   {
-      png_info_init_3(&info_ptr, sizeof(png_info));
-   }
-
-   return (info_ptr);
-}
-
-/* This function frees the memory associated with a single info struct.
- * Normally, one would use either png_destroy_read_struct() or
- * png_destroy_write_struct() to free an info struct, but this may be
- * useful for some applications.
- */
-void PNGAPI
-png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
-{
-   png_infop info_ptr = NULL;
-
-   png_debug(1, "in png_destroy_info_struct\n");
-   if (info_ptr_ptr != NULL)
-      info_ptr = *info_ptr_ptr;
-
-   if (info_ptr != NULL)
-   {
-      png_info_destroy(png_ptr, info_ptr);
-
-#ifdef PNG_USER_MEM_SUPPORTED
-      png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn,
-          png_ptr->mem_ptr);
-#else
-      png_destroy_struct((png_voidp)info_ptr);
-#endif
-      *info_ptr_ptr = (png_infop)NULL;
-   }
-}
-
-/* Initialize the info structure.  This is now an internal function (0.89)
- * and applications using it are urged to use png_create_info_struct()
- * instead.
- */
-#undef png_info_init
-void PNGAPI
-png_info_init(png_infop info_ptr)
-{
-   /* We only come here via pre-1.0.12-compiled applications */
-   png_info_init_3(&info_ptr, 0);
-}
-
-void PNGAPI
-png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
-{
-   png_infop info_ptr = *ptr_ptr;
-
-   png_debug(1, "in png_info_init_3\n");
-
-   if(sizeof(png_info) > png_info_struct_size)
-     {
-       png_destroy_struct(info_ptr);
-       info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
-       *ptr_ptr = info_ptr;
-     }
-
-   /* set everything to 0 */
-   png_memset(info_ptr, 0, sizeof (png_info));
-}
-
-#ifdef PNG_FREE_ME_SUPPORTED
-void PNGAPI
-png_data_freer(png_structp png_ptr, png_infop info_ptr,
-   int freer, png_uint_32 mask)
-{
-   png_debug(1, "in png_data_freer\n");
-   if (png_ptr == NULL || info_ptr == NULL)
-      return;
-   if(freer == PNG_DESTROY_WILL_FREE_DATA)
-      info_ptr->free_me |= mask;
-   else if(freer == PNG_USER_WILL_FREE_DATA)
-      info_ptr->free_me &= ~mask;
-   else
-      png_warning(png_ptr,
-         "Unknown freer parameter in png_data_freer.");
-}
-#endif
-
-void PNGAPI
-png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
-   int num)
-{
-   png_debug(1, "in png_free_data\n");
-   if (png_ptr == NULL || info_ptr == NULL)
-      return;
-
-#if defined(PNG_TEXT_SUPPORTED)
-/* free text item num or (if num == -1) all text items */
-#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_TEXT) & info_ptr->free_me)
-#else
-if (mask & PNG_FREE_TEXT)
-#endif
-{
-   if (num != -1)
-   {
-     if (info_ptr->text && info_ptr->text[num].key)
-     {
-         png_free(png_ptr, info_ptr->text[num].key);
-         info_ptr->text[num].key = NULL;
-     }
-   }
-   else
-   {
-       int i;
-       for (i = 0; i < info_ptr->num_text; i++)
-           png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
-       png_free(png_ptr, info_ptr->text);
-       info_ptr->text = NULL;
-       info_ptr->num_text=0;
-   }
-}
-#endif
-
-#if defined(PNG_tRNS_SUPPORTED)
-/* free any tRNS entry */
-#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_TRNS) & info_ptr->free_me)
-#else
-if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS))
-#endif
-{
-    png_free(png_ptr, info_ptr->trans);
-    info_ptr->valid &= ~PNG_INFO_tRNS;
-    info_ptr->trans = NULL;
-}
-#endif
-
-#if defined(PNG_sCAL_SUPPORTED)
-/* free any sCAL entry */
-#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_SCAL) & info_ptr->free_me)
-#else
-if (mask & PNG_FREE_SCAL)
-#endif
-{
-#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
-    png_free(png_ptr, info_ptr->scal_s_width);
-    png_free(png_ptr, info_ptr->scal_s_height);
-    info_ptr->scal_s_width = NULL;
-    info_ptr->scal_s_height = NULL;
-#endif
-    info_ptr->valid &= ~PNG_INFO_sCAL;
-}
-#endif
-
-#if defined(PNG_pCAL_SUPPORTED)
-/* free any pCAL entry */
-#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_PCAL) & info_ptr->free_me)
-#else
-if (mask & PNG_FREE_PCAL)
-#endif
-{
-    png_free(png_ptr, info_ptr->pcal_purpose);
-    png_free(png_ptr, info_ptr->pcal_units);
-    info_ptr->pcal_purpose = NULL;
-    info_ptr->pcal_units = NULL;
-    if (info_ptr->pcal_params != NULL)
-    {
-        int i;
-        for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
-        {
-          png_free(png_ptr, info_ptr->pcal_params[i]);
-          info_ptr->pcal_params[i]=NULL;
-        }
-        png_free(png_ptr, info_ptr->pcal_params);
-        info_ptr->pcal_params = NULL;
-    }
-    info_ptr->valid &= ~PNG_INFO_pCAL;
-}
-#endif
-
-#if defined(PNG_iCCP_SUPPORTED)
-/* free any iCCP entry */
-#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_ICCP) & info_ptr->free_me)
-#else
-if (mask & PNG_FREE_ICCP)
-#endif
-{
-    png_free(png_ptr, info_ptr->iccp_name);
-    png_free(png_ptr, info_ptr->iccp_profile);
-    info_ptr->iccp_name = NULL;
-    info_ptr->iccp_profile = NULL;
-    info_ptr->valid &= ~PNG_INFO_iCCP;
-}
-#endif
-
-#if defined(PNG_sPLT_SUPPORTED)
-/* free a given sPLT entry, or (if num == -1) all sPLT entries */
-#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_SPLT) & info_ptr->free_me)
-#else
-if (mask & PNG_FREE_SPLT)
-#endif
-{
-   if (num != -1)
-   {
-      if(info_ptr->splt_palettes)
-      {
-          png_free(png_ptr, info_ptr->splt_palettes[num].name);
-          png_free(png_ptr, info_ptr->splt_palettes[num].entries);
-          info_ptr->splt_palettes[num].name = NULL;
-          info_ptr->splt_palettes[num].entries = NULL;
-      }
-   }
-   else
-   {
-       if(info_ptr->splt_palettes_num)
-       {
-         int i;
-         for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
-            png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i);
-
-         png_free(png_ptr, info_ptr->splt_palettes);
-         info_ptr->splt_palettes = NULL;
-         info_ptr->splt_palettes_num = 0;
-       }
-       info_ptr->valid &= ~PNG_INFO_sPLT;
-   }
-}
-#endif
-
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
-#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
-#else
-if (mask & PNG_FREE_UNKN)
-#endif
-{
-   if (num != -1)
-   {
-       if(info_ptr->unknown_chunks)
-       {
-          png_free(png_ptr, info_ptr->unknown_chunks[num].data);
-          info_ptr->unknown_chunks[num].data = NULL;
-       }
-   }
-   else
-   {
-       int i;
-
-       if(info_ptr->unknown_chunks_num)
-       {
-         for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++)
-            png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
-
-         png_free(png_ptr, info_ptr->unknown_chunks);
-         info_ptr->unknown_chunks = NULL;
-         info_ptr->unknown_chunks_num = 0;
-       }
-   }
-}
-#endif
-
-#if defined(PNG_hIST_SUPPORTED)
-/* free any hIST entry */
-#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_HIST)  & info_ptr->free_me)
-#else
-if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST))
-#endif
-{
-    png_free(png_ptr, info_ptr->hist);
-    info_ptr->hist = NULL;
-    info_ptr->valid &= ~PNG_INFO_hIST;
-}
-#endif
-
-/* free any PLTE entry that was internally allocated */
-#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_PLTE) & info_ptr->free_me)
-#else
-if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE))
-#endif
-{
-    png_zfree(png_ptr, info_ptr->palette);
-    info_ptr->palette = NULL;
-    info_ptr->valid &= ~PNG_INFO_PLTE;
-    info_ptr->num_palette = 0;
-}
-
-#if defined(PNG_INFO_IMAGE_SUPPORTED)
-/* free any image bits attached to the info structure */
-#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_ROWS) & info_ptr->free_me)
-#else
-if (mask & PNG_FREE_ROWS)
-#endif
-{
-    if(info_ptr->row_pointers)
-    {
-       int row;
-       for (row = 0; row < (int)info_ptr->height; row++)
-       {
-          png_free(png_ptr, info_ptr->row_pointers[row]);
-          info_ptr->row_pointers[row]=NULL;
-       }
-       png_free(png_ptr, info_ptr->row_pointers);
-       info_ptr->row_pointers=NULL;
-    }
-    info_ptr->valid &= ~PNG_INFO_IDAT;
-}
-#endif
-
-#ifdef PNG_FREE_ME_SUPPORTED
-   if(num == -1)
-     info_ptr->free_me &= ~mask;
-   else
-     info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL);
-#endif
-}
-
-/* This is an internal routine to free any memory that the info struct is
- * pointing to before re-using it or freeing the struct itself.  Recall
- * that png_free() checks for NULL pointers for us.
- */
-void /* PRIVATE */
-png_info_destroy(png_structp png_ptr, png_infop info_ptr)
-{
-   png_debug(1, "in png_info_destroy\n");
-
-   png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
-
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
-   if (png_ptr->num_chunk_list)
-   {
-       png_free(png_ptr, png_ptr->chunk_list);
-       png_ptr->chunk_list=(png_bytep)NULL;
-       png_ptr->num_chunk_list=0;
-   }
-#endif
-
-   png_info_init_3(&info_ptr, sizeof(png_info));
-}
-
-/* This function returns a pointer to the io_ptr associated with the user
- * functions.  The application should free any memory associated with this
- * pointer before png_write_destroy() or png_read_destroy() are called.
- */
-png_voidp PNGAPI
-png_get_io_ptr(png_structp png_ptr)
-{
-   return (png_ptr->io_ptr);
-}
-
-#if !defined(PNG_NO_STDIO)
-/* Initialize the default input/output functions for the PNG file.  If you
- * use your own read or write routines, you can call either png_set_read_fn()
- * or png_set_write_fn() instead of png_init_io().  If you have defined
- * PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't
- * necessarily available.
- */
-void PNGAPI
-png_init_io(png_structp png_ptr, png_FILE_p fp)
-{
-   png_debug(1, "in png_init_io\n");
-   png_ptr->io_ptr = (png_voidp)fp;
-}
-#endif
-
-#if defined(PNG_TIME_RFC1123_SUPPORTED)
-/* Convert the supplied time into an RFC 1123 string suitable for use in
- * a "Creation Time" or other text-based time string.
- */
-png_charp PNGAPI
-png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
-{
-   static PNG_CONST char short_months[12][4] =
-        {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
-         "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
-
-   if (png_ptr->time_buffer == NULL)
-   {
-      png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
-         sizeof(char)));
-   }
-
-#if defined(_WIN32_WCE)
-   {
-      wchar_t time_buf[29];
-      wsprintf(time_buf, TEXT("%d %S %d %02d:%02d:%02d +0000"),
-          ptime->day % 32, short_months[(ptime->month - 1) % 12],
-        ptime->year, ptime->hour % 24, ptime->minute % 60,
-          ptime->second % 61);
-      WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer, 29,
-          NULL, NULL);
-   }
-#else
-#ifdef USE_FAR_KEYWORD
-   {
-      char near_time_buf[29];
-      sprintf(near_time_buf, "%d %s %d %02d:%02d:%02d +0000",
-          ptime->day % 32, short_months[(ptime->month - 1) % 12],
-          ptime->year, ptime->hour % 24, ptime->minute % 60,
-          ptime->second % 61);
-      png_memcpy(png_ptr->time_buffer, near_time_buf,
-          29*sizeof(char));
-   }
-#else
-   sprintf(png_ptr->time_buffer, "%d %s %d %02d:%02d:%02d +0000",
-       ptime->day % 32, short_months[(ptime->month - 1) % 12],
-       ptime->year, ptime->hour % 24, ptime->minute % 60,
-       ptime->second % 61);
-#endif
-#endif /* _WIN32_WCE */
-   return ((png_charp)png_ptr->time_buffer);
-}
-#endif /* PNG_TIME_RFC1123_SUPPORTED */
-
-#if 0
-/* Signature string for a PNG file. */
-png_bytep PNGAPI
-png_sig_bytes(void)
-{
-   return ((png_bytep)"\211\120\116\107\015\012\032\012");
-}
-#endif
-
-png_charp PNGAPI
-png_get_copyright(png_structp png_ptr)
-{
-   if (png_ptr != NULL || png_ptr == NULL)  /* silence compiler warning */
-   return ((png_charp) "\n libpng version 1.2.0 - September 1, 2001\n\
-   Copyright (c) 1998-2001 Glenn Randers-Pehrson\n\
-   Copyright (c) 1996, 1997 Andreas Dilger\n\
-   Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.\n");
-   return ((png_charp) "");
-}
-
-/* The following return the library version as a short string in the
- * format 1.0.0 through 99.99.99zz.  To get the version of *.h files used
- * with your application, print out PNG_LIBPNG_VER_STRING, which is defined
- * in png.h.
- */
-
-png_charp PNGAPI
-png_get_libpng_ver(png_structp png_ptr)
-{
-   /* Version of *.c files used when building libpng */
-   if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */
-      return((png_charp) "1.2.0");
-   return((png_charp) "1.2.0");
-}
-
-png_charp PNGAPI
-png_get_header_ver(png_structp png_ptr)
-{
-   /* Version of *.h files used when building libpng */
-   if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */
-      return((png_charp) PNG_LIBPNG_VER_STRING);
-   return((png_charp) PNG_LIBPNG_VER_STRING);
-}
-
-png_charp PNGAPI
-png_get_header_version(png_structp png_ptr)
-{
-   /* Returns longer string containing both version and date */
-   if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */
-      return((png_charp) PNG_HEADER_VERSION_STRING);
-   return((png_charp) PNG_HEADER_VERSION_STRING);
-}
-
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-int /* PRIVATE */
-png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
-{
-   /* check chunk_name and return "keep" value if it's on the list, else 0 */
-   int i;
-   png_bytep p;
-   if((png_ptr == NULL && chunk_name == NULL) || png_ptr->num_chunk_list<=0)
-      return 0;
-   p=png_ptr->chunk_list+png_ptr->num_chunk_list*5-5;
-   for (i = png_ptr->num_chunk_list; i; i--, p-=5)
-      if (!png_memcmp(chunk_name, p, 4))
-        return ((int)*(p+4));
-   return 0;
-}
-#endif
-
-/* This function, added to libpng-1.0.6g, is untested. */
-int PNGAPI
-png_reset_zstream(png_structp png_ptr)
-{
-   return (inflateReset(&png_ptr->zstream));
-}
-
-/* This function was added to libpng-1.0.7 */
-png_uint_32 PNGAPI
-png_access_version_number(void)
-{
-   /* Version of *.c files used when building libpng */
-   return((png_uint_32) 10200L);
-}
-
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
-    /* GRR:  could add this:   && defined(PNG_MMX_CODE_SUPPORTED) */
-/* this INTERNAL function was added to libpng 1.2.0 */
-void /* PRIVATE */
-png_init_mmx_flags (png_structp png_ptr)
-{
-    png_ptr->mmx_rowbytes_threshold = 0;
-    png_ptr->mmx_bitdepth_threshold = 0;
-
-#  if (defined(PNG_USE_PNGVCRD) || defined(PNG_USE_PNGGCCRD))
-
-    png_ptr->asm_flags |= PNG_ASM_FLAG_MMX_SUPPORT_COMPILED;
-
-    if (png_mmx_support()) {
-        png_ptr->asm_flags |= PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
-#    ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
-                              | PNG_ASM_FLAG_MMX_READ_COMBINE_ROW
-#    endif
-#    ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
-                              | PNG_ASM_FLAG_MMX_READ_INTERLACE
-#    endif
-#    ifndef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
-                              ;
-#    else
-                              | PNG_ASM_FLAG_MMX_READ_FILTER_SUB
-                              | PNG_ASM_FLAG_MMX_READ_FILTER_UP
-                              | PNG_ASM_FLAG_MMX_READ_FILTER_AVG
-                              | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
-
-        png_ptr->mmx_rowbytes_threshold = PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT;
-        png_ptr->mmx_bitdepth_threshold = PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT;
-#    endif
-    } else {
-        png_ptr->asm_flags &= ~( PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
-                               | PNG_MMX_READ_FLAGS
-                               | PNG_MMX_WRITE_FLAGS );
-    }
-
-#  else /* !((PNGVCRD || PNGGCCRD) && PNG_ASSEMBLER_CODE_SUPPORTED)) */
-
-    /* clear all MMX flags; no support is compiled in */
-    png_ptr->asm_flags &= ~( PNG_MMX_FLAGS );
-
-#  endif /* ?(PNGVCRD || PNGGCCRD) */
-}
-
-#endif /* !(PNG_ASSEMBLER_CODE_SUPPORTED) */
-
-/* this function was added to libpng 1.2.0 */
-#if !defined(PNG_USE_PNGGCCRD) && \
-    !(defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGVCRD))
-int PNGAPI
-png_mmx_support(void)
-{
-    return -1;
-}
-#endif