pngset.c

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

         png_memcpy(textp->text, text_ptr[i].text,
            (png_size_t)(text_length));
      *(textp->text + text_length) = '\0';

#ifdef PNG_iTXt_SUPPORTED
      if (textp->compression > 0)
      {
         textp->text_length = 0;
         textp->itxt_length = text_length;
      }
      else
#endif
      {
         textp->text_length = text_length;
#ifdef PNG_iTXt_SUPPORTED
         textp->itxt_length = 0;
#endif
      }
      info_ptr->num_text++;
      png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
   }
   return(0);
}
#endif

#if defined(PNG_tIME_SUPPORTED)
void PNGAPI
png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
{
   png_debug1(1, "in %s storage function", "tIME");
   if (png_ptr == NULL || info_ptr == NULL ||
       (png_ptr->mode & PNG_WROTE_tIME))
      return;

   png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
   info_ptr->valid |= PNG_INFO_tIME;
}
#endif

#if defined(PNG_tRNS_SUPPORTED)
void PNGAPI
png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
   png_bytep trans, int num_trans, png_color_16p trans_values)
{
   png_debug1(1, "in %s storage function", "tRNS");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   if (trans != NULL)
   {
       /*
        * It may not actually be necessary to set png_ptr->trans here;
        * we do it for backward compatibility with the way the png_handle_tRNS
        * function used to do the allocation.
        */

#ifdef PNG_FREE_ME_SUPPORTED
       png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
#endif

       /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
       png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
           (png_uint_32)PNG_MAX_PALETTE_LENGTH);
       if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
         png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
   }

   if (trans_values != NULL)
   {
      int sample_max = (1 << info_ptr->bit_depth);
      if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
          (int)trans_values->gray > sample_max) ||
          (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
          ((int)trans_values->red > sample_max ||
          (int)trans_values->green > sample_max ||
          (int)trans_values->blue > sample_max)))
        png_warning(png_ptr,
           "tRNS chunk has out-of-range samples for bit_depth");
      png_memcpy(&(info_ptr->trans_values), trans_values,
         png_sizeof(png_color_16));
      if (num_trans == 0)
        num_trans = 1;
   }

   info_ptr->num_trans = (png_uint_16)num_trans;
   if (num_trans != 0)
   {
      info_ptr->valid |= PNG_INFO_tRNS;
#ifdef PNG_FREE_ME_SUPPORTED
      info_ptr->free_me |= PNG_FREE_TRNS;
#else
      png_ptr->flags |= PNG_FLAG_FREE_TRNS;
#endif
   }
}
#endif

#if defined(PNG_sPLT_SUPPORTED)
void PNGAPI
png_set_sPLT(png_structp png_ptr,
             png_infop info_ptr, png_sPLT_tp entries, int nentries)
/*
 *  entries        - array of png_sPLT_t structures
 *                   to be added to the list of palettes
 *                   in the info structure.
 *  nentries       - number of palette structures to be
 *                   added.
 */
{
    png_sPLT_tp np;
    int i;

    if (png_ptr == NULL || info_ptr == NULL)
       return;

    np = (png_sPLT_tp)png_malloc_warn(png_ptr,
        (info_ptr->splt_palettes_num + nentries) *
        (png_uint_32)png_sizeof(png_sPLT_t));
    if (np == NULL)
    {
      png_warning(png_ptr, "No memory for sPLT palettes.");
      return;
    }

    png_memcpy(np, info_ptr->splt_palettes,
           info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
    png_free(png_ptr, info_ptr->splt_palettes);
    info_ptr->splt_palettes=NULL;

    for (i = 0; i < nentries; i++)
    {
        png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
        png_sPLT_tp from = entries + i;
        png_uint_32 length;

        length = png_strlen(from->name) + 1;
        to->name = (png_charp)png_malloc_warn(png_ptr, length);
        if (to->name == NULL)
        {
           png_warning(png_ptr,
             "Out of memory while processing sPLT chunk");
           continue;
        }
        png_memcpy(to->name, from->name, length);
        to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
            (png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry)));
        if (to->entries == NULL)
        {
           png_warning(png_ptr,
             "Out of memory while processing sPLT chunk");
           png_free(png_ptr, to->name);
           to->name = NULL;
           continue;
        }
        png_memcpy(to->entries, from->entries,
            from->nentries * png_sizeof(png_sPLT_entry));
        to->nentries = from->nentries;
        to->depth = from->depth;
    }

    info_ptr->splt_palettes = np;
    info_ptr->splt_palettes_num += nentries;
    info_ptr->valid |= PNG_INFO_sPLT;
#ifdef PNG_FREE_ME_SUPPORTED
    info_ptr->free_me |= PNG_FREE_SPLT;
#endif
}
#endif /* PNG_sPLT_SUPPORTED */

#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
void PNGAPI
png_set_unknown_chunks(png_structp png_ptr,
   png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
{
    png_unknown_chunkp np;
    int i;

    if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
        return;

    np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
        (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
        png_sizeof(png_unknown_chunk)));
    if (np == NULL)
    {
       png_warning(png_ptr,
          "Out of memory while processing unknown chunk.");
       return;
    }

    png_memcpy(np, info_ptr->unknown_chunks,
           info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
    png_free(png_ptr, info_ptr->unknown_chunks);
    info_ptr->unknown_chunks=NULL;

    for (i = 0; i < num_unknowns; i++)
    {
       png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
       png_unknown_chunkp from = unknowns + i;

       png_memcpy((png_charp)to->name, 
                  (png_charp)from->name, 
                  png_sizeof(from->name));
       to->name[png_sizeof(to->name)-1] = '\0';
       to->size = from->size;
       /* note our location in the read or write sequence */
       to->location = (png_byte)(png_ptr->mode & 0xff);

       if (from->size == 0)
          to->data=NULL;
       else
       {
          to->data = (png_bytep)png_malloc_warn(png_ptr,
            (png_uint_32)from->size);
          if (to->data == NULL)
          {
             png_warning(png_ptr,
              "Out of memory while processing unknown chunk.");
             to->size = 0;
          }
          else
             png_memcpy(to->data, from->data, from->size);
       }
    }

    info_ptr->unknown_chunks = np;
    info_ptr->unknown_chunks_num += num_unknowns;
#ifdef PNG_FREE_ME_SUPPORTED
    info_ptr->free_me |= PNG_FREE_UNKN;
#endif
}
void PNGAPI
png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
   int chunk, int location)
{
   if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
         (int)info_ptr->unknown_chunks_num)
      info_ptr->unknown_chunks[chunk].location = (png_byte)location;
}
#endif

#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
    defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
void PNGAPI
png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
{
   /* This function is deprecated in favor of png_permit_mng_features()
      and will be removed from libpng-1.3.0 */
   png_debug(1, "in png_permit_empty_plte, DEPRECATED.");
   if (png_ptr == NULL)
      return;
   png_ptr->mng_features_permitted = (png_byte)
     ((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) |
     ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
}
#endif
#endif

#if defined(PNG_MNG_FEATURES_SUPPORTED)
png_uint_32 PNGAPI
png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
{
   png_debug(1, "in png_permit_mng_features");
   if (png_ptr == NULL)
      return (png_uint_32)0;
   png_ptr->mng_features_permitted =
     (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
   return (png_uint_32)png_ptr->mng_features_permitted;
}
#endif

#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
void PNGAPI
png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
   chunk_list, int num_chunks)
{
    png_bytep new_list, p;
    int i, old_num_chunks;
    if (png_ptr == NULL)
       return;
    if (num_chunks == 0)
    {
      if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
        png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
      else
        png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;

      if (keep == PNG_HANDLE_CHUNK_ALWAYS)
        png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
      else
        png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
      return;
    }
    if (chunk_list == NULL)
      return;
    old_num_chunks = png_ptr->num_chunk_list;
    new_list=(png_bytep)png_malloc(png_ptr,
       (png_uint_32)
       (5*(num_chunks + old_num_chunks)));
    if (png_ptr->chunk_list != NULL)
    {
       png_memcpy(new_list, png_ptr->chunk_list,
          (png_size_t)(5*old_num_chunks));
       png_free(png_ptr, png_ptr->chunk_list);
       png_ptr->chunk_list=NULL;
    }
    png_memcpy(new_list + 5*old_num_chunks, chunk_list,
       (png_size_t)(5*num_chunks));
    for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
       *p=(png_byte)keep;
    png_ptr->num_chunk_list = old_num_chunks + num_chunks;
    png_ptr->chunk_list = new_list;
#ifdef PNG_FREE_ME_SUPPORTED
    png_ptr->free_me |= PNG_FREE_LIST;
#endif
}
#endif

#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
void PNGAPI
png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
   png_user_chunk_ptr read_user_chunk_fn)
{
   png_debug(1, "in png_set_read_user_chunk_fn");
   if (png_ptr == NULL)
      return;
   png_ptr->read_user_chunk_fn = read_user_chunk_fn;
   png_ptr->user_chunk_ptr = user_chunk_ptr;
}
#endif

#if defined(PNG_INFO_IMAGE_SUPPORTED)
void PNGAPI
png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
{
   png_debug1(1, "in %s storage function", "rows");

   if (png_ptr == NULL || info_ptr == NULL)
      return;

   if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
      png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
   info_ptr->row_pointers = row_pointers;
   if (row_pointers)
      info_ptr->valid |= PNG_INFO_IDAT;
}
#endif

#ifdef PNG_WRITE_SUPPORTED
void PNGAPI
png_set_compression_buffer_size(png_structp png_ptr,
    png_uint_32 size)
{
    if (png_ptr == NULL)
       return;
    png_free(png_ptr, png_ptr->zbuf);
    png_ptr->zbuf_size = (png_size_t)size;
    png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
    png_ptr->zstream.next_out = png_ptr->zbuf;
    png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
}
#endif

void PNGAPI
png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
{
   if (png_ptr && info_ptr)
      info_ptr->valid &= ~mask;
}


#ifndef PNG_1_0_X
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
/* function was added to libpng 1.2.0 and should always exist by default */
void PNGAPI
png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
{
/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
    if (png_ptr != NULL)
    png_ptr->asm_flags = 0;
    asm_flags = asm_flags; /* Quiet the compiler */
}

/* this function was added to libpng 1.2.0 */
void PNGAPI
png_set_mmx_thresholds (png_structp png_ptr,
                        png_byte mmx_bitdepth_threshold,
                        png_uint_32 mmx_rowbytes_threshold)
{
/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
    if (png_ptr == NULL)
       return;
    /* Quiet the compiler */
    mmx_bitdepth_threshold = mmx_bitdepth_threshold;
    mmx_rowbytes_threshold = mmx_rowbytes_threshold;
}
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */

#ifdef PNG_SET_USER_LIMITS_SUPPORTED
/* this function was added to libpng 1.2.6 */
void PNGAPI
png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
    png_uint_32 user_height_max)
{
    /* Images with dimensions larger than these limits will be
     * rejected by png_set_IHDR().  To accept any PNG datastream
     * regardless of dimensions, set both limits to 0x7ffffffL.
     */
    if (png_ptr == NULL) return;
    png_ptr->user_width_max = user_width_max;
    png_ptr->user_height_max = user_height_max;
}
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */

#endif /* ?PNG_1_0_X */
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */