Blame pngset.c

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/* pngset.c - storage of image information into info struct
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 *
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 * Last changed in libpng 1.2.56 [December 17, 2015]
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 * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
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 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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 *
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 * This code is released under the libpng license.
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 * For conditions of distribution and use, see the disclaimer
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 * and license in png.h
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 *
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 * The functions here are used during reads to store data from the file
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 * into the info struct, and during writes to store application data
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 * into the info struct for writing into the file.  This abstracts the
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 * info struct and allows us to change the structure in the future.
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 */
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#define PNG_INTERNAL
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#define PNG_NO_PEDANTIC_WARNINGS
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#include "png.h"
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#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
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#ifdef PNG_bKGD_SUPPORTED
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void PNGAPI
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png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
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{
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   png_debug1(1, "in %s storage function", "bKGD");
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   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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   png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
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   info_ptr->valid |= PNG_INFO_bKGD;
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}
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#endif
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#ifdef PNG_cHRM_SUPPORTED
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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void PNGAPI
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png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
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   double white_x, double white_y, double red_x, double red_y,
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   double green_x, double green_y, double blue_x, double blue_y)
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{
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   png_debug1(1, "in %s storage function", "cHRM");
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   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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   info_ptr->x_white = (float)white_x;
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   info_ptr->y_white = (float)white_y;
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   info_ptr->x_red   = (float)red_x;
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   info_ptr->y_red   = (float)red_y;
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   info_ptr->x_green = (float)green_x;
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   info_ptr->y_green = (float)green_y;
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   info_ptr->x_blue  = (float)blue_x;
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   info_ptr->y_blue  = (float)blue_y;
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#ifdef PNG_FIXED_POINT_SUPPORTED
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   info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
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   info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
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   info_ptr->int_x_red   = (png_fixed_point)(  red_x*100000.+0.5);
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   info_ptr->int_y_red   = (png_fixed_point)(  red_y*100000.+0.5);
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   info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
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   info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
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   info_ptr->int_x_blue  = (png_fixed_point)( blue_x*100000.+0.5);
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   info_ptr->int_y_blue  = (png_fixed_point)( blue_y*100000.+0.5);
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#endif
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   info_ptr->valid |= PNG_INFO_cHRM;
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}
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#endif /* PNG_FLOATING_POINT_SUPPORTED */
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#ifdef PNG_FIXED_POINT_SUPPORTED
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void PNGAPI
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png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
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   png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
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   png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
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   png_fixed_point blue_x, png_fixed_point blue_y)
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{
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   png_debug1(1, "in %s storage function", "cHRM fixed");
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   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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#ifdef PNG_CHECK_cHRM_SUPPORTED
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   if (png_check_cHRM_fixed(png_ptr,
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      white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))
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#endif
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   {
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      info_ptr->int_x_white = white_x;
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      info_ptr->int_y_white = white_y;
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      info_ptr->int_x_red   = red_x;
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      info_ptr->int_y_red   = red_y;
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      info_ptr->int_x_green = green_x;
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      info_ptr->int_y_green = green_y;
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      info_ptr->int_x_blue  = blue_x;
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      info_ptr->int_y_blue  = blue_y;
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#ifdef  PNG_FLOATING_POINT_SUPPORTED
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      info_ptr->x_white = (float)(white_x/100000.);
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      info_ptr->y_white = (float)(white_y/100000.);
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      info_ptr->x_red   = (float)(  red_x/100000.);
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      info_ptr->y_red   = (float)(  red_y/100000.);
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      info_ptr->x_green = (float)(green_x/100000.);
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      info_ptr->y_green = (float)(green_y/100000.);
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      info_ptr->x_blue  = (float)( blue_x/100000.);
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      info_ptr->y_blue  = (float)( blue_y/100000.);
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#endif
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      info_ptr->valid |= PNG_INFO_cHRM;
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   }
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}
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#endif /* PNG_FIXED_POINT_SUPPORTED */
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#endif /* PNG_cHRM_SUPPORTED */
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#ifdef PNG_gAMA_SUPPORTED
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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void PNGAPI
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png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
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{
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   double png_gamma;
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   png_debug1(1, "in %s storage function", "gAMA");
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   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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   /* Check for overflow */
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   if (file_gamma > 21474.83)
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   {
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      png_warning(png_ptr, "Limiting gamma to 21474.83");
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      png_gamma=21474.83;
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   }
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   else
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      png_gamma = file_gamma;
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   info_ptr->gamma = (float)png_gamma;
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#ifdef PNG_FIXED_POINT_SUPPORTED
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   info_ptr->int_gamma = (int)(png_gamma*100000.+.5);
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#endif
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   info_ptr->valid |= PNG_INFO_gAMA;
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   if (png_gamma == 0.0)
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      png_warning(png_ptr, "Setting gamma=0");
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}
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#endif
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void PNGAPI
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png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
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   int_gamma)
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{
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   png_fixed_point png_gamma;
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   png_debug1(1, "in %s storage function", "gAMA");
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   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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   if (int_gamma > (png_fixed_point)PNG_UINT_31_MAX)
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   {
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      png_warning(png_ptr, "Limiting gamma to 21474.83");
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      png_gamma=PNG_UINT_31_MAX;
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   }
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   else
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   {
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      if (int_gamma < 0)
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      {
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         png_warning(png_ptr, "Setting negative gamma to zero");
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         png_gamma = 0;
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      }
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      else
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         png_gamma = int_gamma;
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   }
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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   info_ptr->gamma = (float)(png_gamma/100000.);
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#endif
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#ifdef PNG_FIXED_POINT_SUPPORTED
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   info_ptr->int_gamma = png_gamma;
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#endif
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   info_ptr->valid |= PNG_INFO_gAMA;
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   if (png_gamma == 0)
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      png_warning(png_ptr, "Setting gamma=0");
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}
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#endif
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#ifdef PNG_hIST_SUPPORTED
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void PNGAPI
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png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
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{
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   int i;
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   png_debug1(1, "in %s storage function", "hIST");
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   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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   if (info_ptr->num_palette == 0 || info_ptr->num_palette
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       > PNG_MAX_PALETTE_LENGTH)
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   {
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      png_warning(png_ptr,
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         "Invalid palette size, hIST allocation skipped.");
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      return;
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   }
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#ifdef PNG_FREE_ME_SUPPORTED
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   png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
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#endif
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   /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
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    * version 1.2.1
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    */
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   png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
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      (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)));
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   if (png_ptr->hist == NULL)
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   {
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      png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
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      return;
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   }
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   for (i = 0; i < info_ptr->num_palette; i++)
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      png_ptr->hist[i] = hist[i];
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   info_ptr->hist = png_ptr->hist;
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   info_ptr->valid |= PNG_INFO_hIST;
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#ifdef PNG_FREE_ME_SUPPORTED
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   info_ptr->free_me |= PNG_FREE_HIST;
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#else
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   png_ptr->flags |= PNG_FLAG_FREE_HIST;
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#endif
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}
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#endif
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void PNGAPI
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png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
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   png_uint_32 width, png_uint_32 height, int bit_depth,
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   int color_type, int interlace_type, int compression_type,
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   int filter_type)
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{
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   png_debug1(1, "in %s storage function", "IHDR");
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   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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   info_ptr->width = width;
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   info_ptr->height = height;
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   info_ptr->bit_depth = (png_byte)bit_depth;
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   info_ptr->color_type = (png_byte)color_type;
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   info_ptr->compression_type = (png_byte)compression_type;
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   info_ptr->filter_type = (png_byte)filter_type;
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   info_ptr->interlace_type = (png_byte)interlace_type;
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   png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
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       info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
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       info_ptr->compression_type, info_ptr->filter_type);
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   if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
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      info_ptr->channels = 1;
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   else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
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      info_ptr->channels = 3;
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   else
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      info_ptr->channels = 1;
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   if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
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      info_ptr->channels++;
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   info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
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   /* Check for potential overflow */
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   if (width > (PNG_UINT_32_MAX
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                 >> 3)      /* 8-byte RGBA pixels */
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                 - 64       /* bigrowbuf hack */
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                 - 1        /* filter byte */
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                 - 7*8      /* rounding of width to multiple of 8 pixels */
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                 - 8)       /* extra max_pixel_depth pad */
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   {
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      info_ptr->rowbytes = (png_size_t)0;
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      png_error(png_ptr, "Image width is too large for this architecture");
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   }
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   else
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      info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
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}
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#ifdef PNG_oFFs_SUPPORTED
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void PNGAPI
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png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
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   png_int_32 offset_x, png_int_32 offset_y, int unit_type)
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{
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   png_debug1(1, "in %s storage function", "oFFs");
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   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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   info_ptr->x_offset = offset_x;
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   info_ptr->y_offset = offset_y;
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   info_ptr->offset_unit_type = (png_byte)unit_type;
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   info_ptr->valid |= PNG_INFO_oFFs;
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}
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#endif
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#ifdef PNG_pCAL_SUPPORTED
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void PNGAPI
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png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
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   png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
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   png_charp units, png_charpp params)
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{
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   png_uint_32 length;
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   int i;
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   png_debug1(1, "in %s storage function", "pCAL");
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   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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   length = png_strlen(purpose) + 1;
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   png_debug1(3, "allocating purpose for info (%lu bytes)",
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     (unsigned long)length);
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   info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
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   if (info_ptr->pcal_purpose == NULL)
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   {
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      png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
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      return;
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   }
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   png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
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   png_debug(3, "storing X0, X1, type, and nparams in info");
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   info_ptr->pcal_X0 = X0;
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   info_ptr->pcal_X1 = X1;
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   info_ptr->pcal_type = (png_byte)type;
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   info_ptr->pcal_nparams = (png_byte)nparams;
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   length = png_strlen(units) + 1;
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   png_debug1(3, "allocating units for info (%lu bytes)",
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     (unsigned long)length);
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   info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
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   if (info_ptr->pcal_units == NULL)
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   {
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      png_warning(png_ptr, "Insufficient memory for pCAL units.");
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      return;
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   }
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   png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
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   info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
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      (png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
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   if (info_ptr->pcal_params == NULL)
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   {
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      png_warning(png_ptr, "Insufficient memory for pCAL params.");
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      return;
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   }
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   png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));
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   for (i = 0; i < nparams; i++)
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   {
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      length = png_strlen(params[i]) + 1;
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      png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
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        (unsigned long)length);
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      info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
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      if (info_ptr->pcal_params[i] == NULL)
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      {
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         png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
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         return;
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      }
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      png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
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   }
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   info_ptr->valid |= PNG_INFO_pCAL;
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#ifdef PNG_FREE_ME_SUPPORTED
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   info_ptr->free_me |= PNG_FREE_PCAL;
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#endif
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}
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#endif
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#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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void PNGAPI
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png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
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             int unit, double width, double height)
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{
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   png_debug1(1, "in %s storage function", "sCAL");
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   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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   info_ptr->scal_unit = (png_byte)unit;
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   info_ptr->scal_pixel_width = width;
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   info_ptr->scal_pixel_height = height;
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   info_ptr->valid |= PNG_INFO_sCAL;
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}
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#else
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#ifdef PNG_FIXED_POINT_SUPPORTED
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void PNGAPI
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png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
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             int unit, png_charp swidth, png_charp sheight)
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{
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   png_uint_32 length;
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   png_debug1(1, "in %s storage function", "sCAL");
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   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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   info_ptr->scal_unit = (png_byte)unit;
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   length = png_strlen(swidth) + 1;
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   png_debug1(3, "allocating unit for info (%u bytes)",
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      (unsigned int)length);
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   info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
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   if (info_ptr->scal_s_width == NULL)
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   {
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      png_warning(png_ptr,
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         "Memory allocation failed while processing sCAL.");
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      return;
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   }
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   png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
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   length = png_strlen(sheight) + 1;
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   png_debug1(3, "allocating unit for info (%u bytes)",
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      (unsigned int)length);
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   info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
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   if (info_ptr->scal_s_height == NULL)
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   {
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      png_free (png_ptr, info_ptr->scal_s_width);
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      info_ptr->scal_s_width = NULL;
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      png_warning(png_ptr,
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         "Memory allocation failed while processing sCAL.");
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      return;
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   }
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   png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
Packit 0ba690
   info_ptr->valid |= PNG_INFO_sCAL;
Packit 0ba690
#ifdef PNG_FREE_ME_SUPPORTED
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   info_ptr->free_me |= PNG_FREE_SCAL;
Packit 0ba690
#endif
Packit 0ba690
}
Packit 0ba690
#endif
Packit 0ba690
#endif
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
#ifdef PNG_pHYs_SUPPORTED
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void PNGAPI
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png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
Packit 0ba690
   png_uint_32 res_x, png_uint_32 res_y, int unit_type)
Packit 0ba690
{
Packit 0ba690
   png_debug1(1, "in %s storage function", "pHYs");
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL || info_ptr == NULL)
Packit 0ba690
      return;
Packit 0ba690
Packit 0ba690
   info_ptr->x_pixels_per_unit = res_x;
Packit 0ba690
   info_ptr->y_pixels_per_unit = res_y;
Packit 0ba690
   info_ptr->phys_unit_type = (png_byte)unit_type;
Packit 0ba690
   info_ptr->valid |= PNG_INFO_pHYs;
Packit 0ba690
}
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
Packit 0ba690
   png_colorp palette, int num_palette)
Packit 0ba690
{
Packit 0ba690
Packit 0ba690
   png_uint_32 max_palette_length;
Packit 0ba690
Packit 0ba690
   png_debug1(1, "in %s storage function", "PLTE");
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL || info_ptr == NULL)
Packit 0ba690
      return;
Packit 0ba690
Packit 0ba690
   max_palette_length = (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ?
Packit 0ba690
      (1 << info_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH;
Packit 0ba690
Packit 0ba690
   if (num_palette < 0 || num_palette > (int) max_palette_length)
Packit 0ba690
   {
Packit 0ba690
      if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
Packit 0ba690
         png_error(png_ptr, "Invalid palette length");
Packit 0ba690
      else
Packit 0ba690
      {
Packit 0ba690
         png_warning(png_ptr, "Invalid palette length");
Packit 0ba690
         return;
Packit 0ba690
      }
Packit 0ba690
   }
Packit 0ba690
Packit 0ba690
   /* It may not actually be necessary to set png_ptr->palette here;
Packit 0ba690
    * we do it for backward compatibility with the way the png_handle_tRNS
Packit 0ba690
    * function used to do the allocation.
Packit 0ba690
    */
Packit 0ba690
#ifdef PNG_FREE_ME_SUPPORTED
Packit 0ba690
   png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
   /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
Packit 0ba690
    * of num_palette entries, in case of an invalid PNG file or incorrect
Packit 0ba690
    * call to png_set_PLTE() with too-large sample values.
Packit 0ba690
    */
Packit 0ba690
   png_ptr->palette = (png_colorp)png_calloc(png_ptr,
Packit 0ba690
      PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
Packit 0ba690
   png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
Packit 0ba690
   info_ptr->palette = png_ptr->palette;
Packit 0ba690
   info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
Packit 0ba690
Packit 0ba690
#ifdef PNG_FREE_ME_SUPPORTED
Packit 0ba690
   info_ptr->free_me |= PNG_FREE_PLTE;
Packit 0ba690
#else
Packit 0ba690
   png_ptr->flags |= PNG_FLAG_FREE_PLTE;
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
   info_ptr->valid |= PNG_INFO_PLTE;
Packit 0ba690
}
Packit 0ba690
Packit 0ba690
#ifdef PNG_sBIT_SUPPORTED
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void PNGAPI
Packit 0ba690
png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
Packit 0ba690
   png_color_8p sig_bit)
Packit 0ba690
{
Packit 0ba690
   png_debug1(1, "in %s storage function", "sBIT");
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL || info_ptr == NULL)
Packit 0ba690
      return;
Packit 0ba690
Packit 0ba690
   png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
Packit 0ba690
   info_ptr->valid |= PNG_INFO_sBIT;
Packit 0ba690
}
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
#ifdef PNG_sRGB_SUPPORTED
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
Packit 0ba690
{
Packit 0ba690
   png_debug1(1, "in %s storage function", "sRGB");
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL || info_ptr == NULL)
Packit 0ba690
      return;
Packit 0ba690
Packit 0ba690
   info_ptr->srgb_intent = (png_byte)intent;
Packit 0ba690
   info_ptr->valid |= PNG_INFO_sRGB;
Packit 0ba690
}
Packit 0ba690
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
Packit 0ba690
   int intent)
Packit 0ba690
{
Packit 0ba690
#ifdef PNG_gAMA_SUPPORTED
Packit 0ba690
#ifdef PNG_FLOATING_POINT_SUPPORTED
Packit 0ba690
   float file_gamma;
Packit 0ba690
#endif
Packit 0ba690
#ifdef PNG_FIXED_POINT_SUPPORTED
Packit 0ba690
   png_fixed_point int_file_gamma;
Packit 0ba690
#endif
Packit 0ba690
#endif
Packit 0ba690
#ifdef PNG_cHRM_SUPPORTED
Packit 0ba690
#ifdef PNG_FLOATING_POINT_SUPPORTED
Packit 0ba690
   float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
Packit 0ba690
#endif
Packit 0ba690
#ifdef PNG_FIXED_POINT_SUPPORTED
Packit 0ba690
   png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
Packit 0ba690
      int_green_y, int_blue_x, int_blue_y;
Packit 0ba690
#endif
Packit 0ba690
#endif
Packit 0ba690
   png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL || info_ptr == NULL)
Packit 0ba690
      return;
Packit 0ba690
Packit 0ba690
   png_set_sRGB(png_ptr, info_ptr, intent);
Packit 0ba690
Packit 0ba690
#ifdef PNG_gAMA_SUPPORTED
Packit 0ba690
#ifdef PNG_FLOATING_POINT_SUPPORTED
Packit 0ba690
   file_gamma = (float).45455;
Packit 0ba690
   png_set_gAMA(png_ptr, info_ptr, file_gamma);
Packit 0ba690
#endif
Packit 0ba690
#ifdef PNG_FIXED_POINT_SUPPORTED
Packit 0ba690
   int_file_gamma = 45455L;
Packit 0ba690
   png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
Packit 0ba690
#endif
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
#ifdef PNG_cHRM_SUPPORTED
Packit 0ba690
#  ifdef PNG_FIXED_POINT_SUPPORTED
Packit 0ba690
   int_white_x = 31270L;
Packit 0ba690
   int_white_y = 32900L;
Packit 0ba690
   int_red_x   = 64000L;
Packit 0ba690
   int_red_y   = 33000L;
Packit 0ba690
   int_green_x = 30000L;
Packit 0ba690
   int_green_y = 60000L;
Packit 0ba690
   int_blue_x  = 15000L;
Packit 0ba690
   int_blue_y  =  6000L;
Packit 0ba690
   png_set_cHRM_fixed(png_ptr, info_ptr,
Packit 0ba690
       int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
Packit 0ba690
       int_green_y, int_blue_x, int_blue_y);
Packit 0ba690
#  endif
Packit 0ba690
Packit 0ba690
#  ifdef PNG_FLOATING_POINT_SUPPORTED
Packit 0ba690
   white_x = (float).3127;
Packit 0ba690
   white_y = (float).3290;
Packit 0ba690
   red_x   = (float).64;
Packit 0ba690
   red_y   = (float).33;
Packit 0ba690
   green_x = (float).30;
Packit 0ba690
   green_y = (float).60;
Packit 0ba690
   blue_x  = (float).15;
Packit 0ba690
   blue_y  = (float).06;
Packit 0ba690
   png_set_cHRM(png_ptr, info_ptr,
Packit 0ba690
       white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
Packit 0ba690
#  endif
Packit 0ba690
#endif /* cHRM */
Packit 0ba690
}
Packit 0ba690
#endif /* sRGB */
Packit 0ba690
Packit 0ba690
Packit 0ba690
#ifdef PNG_iCCP_SUPPORTED
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
Packit 0ba690
             png_charp name, int compression_type,
Packit 0ba690
             png_charp profile, png_uint_32 proflen)
Packit 0ba690
{
Packit 0ba690
   png_charp new_iccp_name;
Packit 0ba690
   png_charp new_iccp_profile;
Packit 0ba690
   png_uint_32 length;
Packit 0ba690
Packit 0ba690
   png_debug1(1, "in %s storage function", "iCCP");
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
Packit 0ba690
      return;
Packit 0ba690
Packit 0ba690
   length = png_strlen(name)+1;
Packit 0ba690
   new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
Packit 0ba690
   if (new_iccp_name == NULL)
Packit 0ba690
   {
Packit 0ba690
        png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
Packit 0ba690
      return;
Packit 0ba690
   }
Packit 0ba690
   png_memcpy(new_iccp_name, name, length);
Packit 0ba690
   new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
Packit 0ba690
   if (new_iccp_profile == NULL)
Packit 0ba690
   {
Packit 0ba690
      png_free (png_ptr, new_iccp_name);
Packit 0ba690
      png_warning(png_ptr,
Packit 0ba690
          "Insufficient memory to process iCCP profile.");
Packit 0ba690
      return;
Packit 0ba690
   }
Packit 0ba690
   png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
Packit 0ba690
Packit 0ba690
   png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
Packit 0ba690
Packit 0ba690
   info_ptr->iccp_proflen = proflen;
Packit 0ba690
   info_ptr->iccp_name = new_iccp_name;
Packit 0ba690
   info_ptr->iccp_profile = new_iccp_profile;
Packit 0ba690
   /* Compression is always zero but is here so the API and info structure
Packit 0ba690
    * does not have to change if we introduce multiple compression types
Packit 0ba690
    */
Packit 0ba690
   info_ptr->iccp_compression = (png_byte)compression_type;
Packit 0ba690
#ifdef PNG_FREE_ME_SUPPORTED
Packit 0ba690
   info_ptr->free_me |= PNG_FREE_ICCP;
Packit 0ba690
#endif
Packit 0ba690
   info_ptr->valid |= PNG_INFO_iCCP;
Packit 0ba690
}
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
#ifdef PNG_TEXT_SUPPORTED
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
Packit 0ba690
             int num_text)
Packit 0ba690
{
Packit 0ba690
   int ret;
Packit 0ba690
   ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
Packit 0ba690
   if (ret)
Packit 0ba690
      png_error(png_ptr, "Insufficient memory to store text");
Packit 0ba690
}
Packit 0ba690
Packit 0ba690
int /* PRIVATE */
Packit 0ba690
png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
Packit 0ba690
               int num_text)
Packit 0ba690
{
Packit 0ba690
   int i;
Packit 0ba690
Packit 0ba690
   png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
Packit 0ba690
      png_ptr->chunk_name[0] == '\0') ?
Packit 0ba690
      "text" : (png_const_charp)png_ptr->chunk_name));
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
Packit 0ba690
      return(0);
Packit 0ba690
Packit 0ba690
   /* Make sure we have enough space in the "text" array in info_struct
Packit 0ba690
    * to hold all of the incoming text_ptr objects.
Packit 0ba690
    */
Packit 0ba690
   if (info_ptr->num_text + num_text > info_ptr->max_text)
Packit 0ba690
   {
Packit 0ba690
      int old_max_text = info_ptr->max_text;
Packit 0ba690
      int old_num_text = info_ptr->num_text;
Packit 0ba690
Packit 0ba690
      if (info_ptr->text != NULL)
Packit 0ba690
      {
Packit 0ba690
         png_textp old_text;
Packit 0ba690
Packit 0ba690
         info_ptr->max_text = info_ptr->num_text + num_text + 8;
Packit 0ba690
         old_text = info_ptr->text;
Packit 0ba690
Packit 0ba690
         info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
Packit 0ba690
            (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
Packit 0ba690
         if (info_ptr->text == NULL)
Packit 0ba690
         {
Packit 0ba690
            /* Restore to previous condition */
Packit 0ba690
            info_ptr->max_text = old_max_text;
Packit 0ba690
            info_ptr->text = old_text;
Packit 0ba690
            return(1);
Packit 0ba690
         }
Packit 0ba690
         png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max_text *
Packit 0ba690
            png_sizeof(png_text)));
Packit 0ba690
         png_free(png_ptr, old_text);
Packit 0ba690
      }
Packit 0ba690
      else
Packit 0ba690
      {
Packit 0ba690
         info_ptr->max_text = num_text + 8;
Packit 0ba690
         info_ptr->num_text = 0;
Packit 0ba690
         info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
Packit 0ba690
            (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
Packit 0ba690
         if (info_ptr->text == NULL)
Packit 0ba690
         {
Packit 0ba690
            /* Restore to previous condition */
Packit 0ba690
            info_ptr->num_text = old_num_text;
Packit 0ba690
            info_ptr->max_text = old_max_text;
Packit 0ba690
            return(1);
Packit 0ba690
         }
Packit 0ba690
#ifdef PNG_FREE_ME_SUPPORTED
Packit 0ba690
         info_ptr->free_me |= PNG_FREE_TEXT;
Packit 0ba690
#endif
Packit 0ba690
      }
Packit 0ba690
      png_debug1(3, "allocated %d entries for info_ptr->text",
Packit 0ba690
         info_ptr->max_text);
Packit 0ba690
   }
Packit 0ba690
Packit 0ba690
   for (i = 0; i < num_text; i++)
Packit 0ba690
   {
Packit 0ba690
      png_size_t text_length, key_len;
Packit 0ba690
      png_size_t lang_len, lang_key_len;
Packit 0ba690
      png_textp textp = &(info_ptr->text[info_ptr->num_text]);
Packit 0ba690
Packit 0ba690
      if (text_ptr[i].key == NULL)
Packit 0ba690
          continue;
Packit 0ba690
Packit 0ba690
      key_len = png_strlen(text_ptr[i].key);
Packit 0ba690
Packit 0ba690
      if (text_ptr[i].compression <= 0)
Packit 0ba690
      {
Packit 0ba690
         lang_len = 0;
Packit 0ba690
         lang_key_len = 0;
Packit 0ba690
      }
Packit 0ba690
Packit 0ba690
      else
Packit 0ba690
#ifdef PNG_iTXt_SUPPORTED
Packit 0ba690
      {
Packit 0ba690
         /* Set iTXt data */
Packit 0ba690
Packit 0ba690
         if (text_ptr[i].lang != NULL)
Packit 0ba690
            lang_len = png_strlen(text_ptr[i].lang);
Packit 0ba690
         else
Packit 0ba690
            lang_len = 0;
Packit 0ba690
         if (text_ptr[i].lang_key != NULL)
Packit 0ba690
            lang_key_len = png_strlen(text_ptr[i].lang_key);
Packit 0ba690
         else
Packit 0ba690
            lang_key_len = 0;
Packit 0ba690
      }
Packit 0ba690
#else /* PNG_iTXt_SUPPORTED */
Packit 0ba690
      {
Packit 0ba690
         png_warning(png_ptr, "iTXt chunk not supported.");
Packit 0ba690
         continue;
Packit 0ba690
      }
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
      if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
Packit 0ba690
      {
Packit 0ba690
         text_length = 0;
Packit 0ba690
#ifdef PNG_iTXt_SUPPORTED
Packit 0ba690
         if (text_ptr[i].compression > 0)
Packit 0ba690
            textp->compression = PNG_ITXT_COMPRESSION_NONE;
Packit 0ba690
         else
Packit 0ba690
#endif
Packit 0ba690
            textp->compression = PNG_TEXT_COMPRESSION_NONE;
Packit 0ba690
      }
Packit 0ba690
Packit 0ba690
      else
Packit 0ba690
      {
Packit 0ba690
         text_length = png_strlen(text_ptr[i].text);
Packit 0ba690
         textp->compression = text_ptr[i].compression;
Packit 0ba690
      }
Packit 0ba690
Packit 0ba690
      textp->key = (png_charp)png_malloc_warn(png_ptr,
Packit 0ba690
         (png_uint_32)
Packit 0ba690
         (key_len + text_length + lang_len + lang_key_len + 4));
Packit 0ba690
      if (textp->key == NULL)
Packit 0ba690
         return(1);
Packit 0ba690
      png_debug2(2, "Allocated %lu bytes at %p in png_set_text",
Packit 0ba690
                 (png_uint_32)
Packit 0ba690
                 (key_len + lang_len + lang_key_len + text_length + 4),
Packit 0ba690
                 textp->key);
Packit 0ba690
Packit 0ba690
      png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
Packit 0ba690
      *(textp->key + key_len) = '\0';
Packit 0ba690
#ifdef PNG_iTXt_SUPPORTED
Packit 0ba690
      if (text_ptr[i].compression > 0)
Packit 0ba690
      {
Packit 0ba690
         textp->lang = textp->key + key_len + 1;
Packit 0ba690
         png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
Packit 0ba690
         *(textp->lang + lang_len) = '\0';
Packit 0ba690
         textp->lang_key = textp->lang + lang_len + 1;
Packit 0ba690
         png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
Packit 0ba690
         *(textp->lang_key + lang_key_len) = '\0';
Packit 0ba690
         textp->text = textp->lang_key + lang_key_len + 1;
Packit 0ba690
      }
Packit 0ba690
      else
Packit 0ba690
#endif
Packit 0ba690
      {
Packit 0ba690
#ifdef PNG_iTXt_SUPPORTED
Packit 0ba690
         textp->lang=NULL;
Packit 0ba690
         textp->lang_key=NULL;
Packit 0ba690
#endif
Packit 0ba690
         textp->text = textp->key + key_len + 1;
Packit 0ba690
      }
Packit 0ba690
      if (text_length)
Packit 0ba690
         png_memcpy(textp->text, text_ptr[i].text,
Packit 0ba690
            (png_size_t)(text_length));
Packit 0ba690
      *(textp->text + text_length) = '\0';
Packit 0ba690
Packit 0ba690
#ifdef PNG_iTXt_SUPPORTED
Packit 0ba690
      if (textp->compression > 0)
Packit 0ba690
      {
Packit 0ba690
         textp->text_length = 0;
Packit 0ba690
         textp->itxt_length = text_length;
Packit 0ba690
      }
Packit 0ba690
      else
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
      {
Packit 0ba690
         textp->text_length = text_length;
Packit 0ba690
#ifdef PNG_iTXt_SUPPORTED
Packit 0ba690
         textp->itxt_length = 0;
Packit 0ba690
#endif
Packit 0ba690
      }
Packit 0ba690
      info_ptr->num_text++;
Packit 0ba690
      png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
Packit 0ba690
   }
Packit 0ba690
   return(0);
Packit 0ba690
}
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
#ifdef PNG_tIME_SUPPORTED
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
Packit 0ba690
{
Packit 0ba690
   png_debug1(1, "in %s storage function", "tIME");
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL || info_ptr == NULL ||
Packit 0ba690
       (png_ptr->mode & PNG_WROTE_tIME))
Packit 0ba690
      return;
Packit 0ba690
Packit 0ba690
   if (mod_time->month == 0   || mod_time->month > 12  ||
Packit 0ba690
       mod_time->day   == 0   || mod_time->day   > 31  ||
Packit 0ba690
       mod_time->hour  > 23   || mod_time->minute > 59 ||
Packit 0ba690
       mod_time->second > 60)
Packit 0ba690
   {
Packit 0ba690
      png_warning(png_ptr, "Ignoring invalid time value");
Packit 0ba690
      return;
Packit 0ba690
   }
Packit 0ba690
Packit 0ba690
   png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
Packit 0ba690
   info_ptr->valid |= PNG_INFO_tIME;
Packit 0ba690
}
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
#ifdef PNG_tRNS_SUPPORTED
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
Packit 0ba690
   png_bytep trans, int num_trans, png_color_16p trans_values)
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{
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   png_debug1(1, "in %s storage function", "tRNS");
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   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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   if (num_trans < 0 || num_trans > PNG_MAX_PALETTE_LENGTH)
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      {
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        png_warning(png_ptr, "Ignoring invalid num_trans value");
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        return;
Packit 0ba690
      }
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   if (trans != NULL)
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   {
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       /* It may not actually be necessary to set png_ptr->trans here;
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        * we do it for backward compatibility with the way the png_handle_tRNS
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        * function used to do the allocation.
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        */
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#ifdef PNG_FREE_ME_SUPPORTED
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       png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
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#endif
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       /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
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       png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
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           (png_uint_32)PNG_MAX_PALETTE_LENGTH);
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       if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
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          png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
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   }
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   if (trans_values != NULL)
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   {
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      int sample_max = (1 << info_ptr->bit_depth);
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      if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
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          (int)trans_values->gray > sample_max) ||
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          (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
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          ((int)trans_values->red > sample_max ||
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          (int)trans_values->green > sample_max ||
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          (int)trans_values->blue > sample_max)))
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         png_warning(png_ptr,
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            "tRNS chunk has out-of-range samples for bit_depth");
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      png_memcpy(&(info_ptr->trans_values), trans_values,
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         png_sizeof(png_color_16));
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      if (num_trans == 0)
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         num_trans = 1;
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   }
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   info_ptr->num_trans = (png_uint_16)num_trans;
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   if (num_trans != 0)
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   {
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      info_ptr->valid |= PNG_INFO_tRNS;
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#ifdef PNG_FREE_ME_SUPPORTED
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      info_ptr->free_me |= PNG_FREE_TRNS;
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#else
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      png_ptr->flags |= PNG_FLAG_FREE_TRNS;
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#endif
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   }
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}
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#endif
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#ifdef PNG_sPLT_SUPPORTED
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void PNGAPI
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png_set_sPLT(png_structp png_ptr,
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             png_infop info_ptr, png_sPLT_tp entries, int nentries)
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/*
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 *  entries        - array of png_sPLT_t structures
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 *                   to be added to the list of palettes
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 *                   in the info structure.
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 *  nentries       - number of palette structures to be
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 *                   added.
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 */
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{
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   png_sPLT_tp np;
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   int i;
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Packit 0ba690
   if (png_ptr == NULL || info_ptr == NULL)
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      return;
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   np = (png_sPLT_tp)png_malloc_warn(png_ptr,
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       (info_ptr->splt_palettes_num + nentries) *
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        (png_uint_32)png_sizeof(png_sPLT_t));
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   if (np == NULL)
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   {
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      png_warning(png_ptr, "No memory for sPLT palettes.");
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      return;
Packit 0ba690
   }
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Packit 0ba690
   png_memcpy(np, info_ptr->splt_palettes,
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       info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
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   png_free(png_ptr, info_ptr->splt_palettes);
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   info_ptr->splt_palettes=NULL;
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   for (i = 0; i < nentries; i++)
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   {
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      png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
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      png_sPLT_tp from = entries + i;
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      png_uint_32 length;
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      length = png_strlen(from->name) + 1;
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      to->name = (png_charp)png_malloc_warn(png_ptr, length);
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      if (to->name == NULL)
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      {
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         png_warning(png_ptr,
Packit 0ba690
           "Out of memory while processing sPLT chunk");
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         continue;
Packit 0ba690
      }
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      png_memcpy(to->name, from->name, length);
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      to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
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          (png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry)));
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      if (to->entries == NULL)
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      {
Packit 0ba690
         png_warning(png_ptr,
Packit 0ba690
           "Out of memory while processing sPLT chunk");
Packit 0ba690
         png_free(png_ptr, to->name);
Packit 0ba690
         to->name = NULL;
Packit 0ba690
         continue;
Packit 0ba690
      }
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      png_memcpy(to->entries, from->entries,
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          from->nentries * png_sizeof(png_sPLT_entry));
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      to->nentries = from->nentries;
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      to->depth = from->depth;
Packit 0ba690
   }
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Packit 0ba690
   info_ptr->splt_palettes = np;
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   info_ptr->splt_palettes_num += nentries;
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   info_ptr->valid |= PNG_INFO_sPLT;
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#ifdef PNG_FREE_ME_SUPPORTED
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   info_ptr->free_me |= PNG_FREE_SPLT;
Packit 0ba690
#endif
Packit 0ba690
}
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#endif /* PNG_sPLT_SUPPORTED */
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#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
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void PNGAPI
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png_set_unknown_chunks(png_structp png_ptr,
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   png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
Packit 0ba690
{
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   png_unknown_chunkp np;
Packit 0ba690
   int i;
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
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      return;
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Packit 0ba690
   np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
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       (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
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       png_sizeof(png_unknown_chunk)));
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   if (np == NULL)
Packit 0ba690
   {
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      png_warning(png_ptr,
Packit 0ba690
          "Out of memory while processing unknown chunk.");
Packit 0ba690
      return;
Packit 0ba690
   }
Packit 0ba690
Packit 0ba690
   png_memcpy(np, info_ptr->unknown_chunks,
Packit 0ba690
       info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
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   png_free(png_ptr, info_ptr->unknown_chunks);
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   info_ptr->unknown_chunks = NULL;
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Packit 0ba690
   for (i = 0; i < num_unknowns; i++)
Packit 0ba690
   {
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      png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
Packit 0ba690
      png_unknown_chunkp from = unknowns + i;
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Packit 0ba690
      png_memcpy((png_charp)to->name, (png_charp)from->name,
Packit 0ba690
          png_sizeof(from->name));
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      to->name[png_sizeof(to->name)-1] = '\0';
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      to->size = from->size;
Packit 0ba690
      /* Note our location in the read or write sequence */
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      to->location = (png_byte)(png_ptr->mode & 0xff);
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Packit 0ba690
      if (from->size == 0)
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         to->data=NULL;
Packit 0ba690
      else
Packit 0ba690
      {
Packit 0ba690
         to->data = (png_bytep)png_malloc_warn(png_ptr,
Packit 0ba690
           (png_uint_32)from->size);
Packit 0ba690
         if (to->data == NULL)
Packit 0ba690
         {
Packit 0ba690
            png_warning(png_ptr,
Packit 0ba690
             "Out of memory while processing unknown chunk.");
Packit 0ba690
            to->size = 0;
Packit 0ba690
         }
Packit 0ba690
         else
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            png_memcpy(to->data, from->data, from->size);
Packit 0ba690
      }
Packit 0ba690
   }
Packit 0ba690
Packit 0ba690
   info_ptr->unknown_chunks = np;
Packit 0ba690
   info_ptr->unknown_chunks_num += num_unknowns;
Packit 0ba690
#ifdef PNG_FREE_ME_SUPPORTED
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   info_ptr->free_me |= PNG_FREE_UNKN;
Packit 0ba690
#endif
Packit 0ba690
}
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void PNGAPI
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png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
Packit 0ba690
   int chunk, int location)
Packit 0ba690
{
Packit 0ba690
   if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
Packit 0ba690
       (int)info_ptr->unknown_chunks_num)
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      info_ptr->unknown_chunks[chunk].location = (png_byte)location;
Packit 0ba690
}
Packit 0ba690
#endif
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Packit 0ba690
#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
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#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
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    defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
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void PNGAPI
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png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
Packit 0ba690
{
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   /* This function is deprecated in favor of png_permit_mng_features()
Packit 0ba690
      and will be removed from libpng-1.3.0 */
Packit 0ba690
Packit 0ba690
   png_debug(1, "in png_permit_empty_plte, DEPRECATED.");
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL)
Packit 0ba690
      return;
Packit 0ba690
   png_ptr->mng_features_permitted = (png_byte)
Packit 0ba690
     ((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) |
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     ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
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}
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#endif
Packit 0ba690
#endif
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Packit 0ba690
#ifdef PNG_MNG_FEATURES_SUPPORTED
Packit 0ba690
png_uint_32 PNGAPI
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png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
Packit 0ba690
{
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   png_debug(1, "in png_permit_mng_features");
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL)
Packit 0ba690
      return (png_uint_32)0;
Packit 0ba690
   png_ptr->mng_features_permitted =
Packit 0ba690
     (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
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   return (png_uint_32)png_ptr->mng_features_permitted;
Packit 0ba690
}
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
Packit 0ba690
   chunk_list, int num_chunks)
Packit 0ba690
{
Packit 0ba690
   png_bytep new_list, p;
Packit 0ba690
   int i, old_num_chunks;
Packit 0ba690
   if (png_ptr == NULL)
Packit 0ba690
      return;
Packit 0ba690
   if (num_chunks == 0)
Packit 0ba690
   {
Packit 0ba690
      if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
Packit 0ba690
         png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
Packit 0ba690
      else
Packit 0ba690
         png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
Packit 0ba690
Packit 0ba690
      if (keep == PNG_HANDLE_CHUNK_ALWAYS)
Packit 0ba690
         png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
Packit 0ba690
      else
Packit 0ba690
         png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
Packit 0ba690
      return;
Packit 0ba690
   }
Packit 0ba690
   if (chunk_list == NULL)
Packit 0ba690
      return;
Packit 0ba690
   old_num_chunks = png_ptr->num_chunk_list;
Packit 0ba690
   new_list=(png_bytep)png_malloc(png_ptr,
Packit 0ba690
      (png_uint_32)
Packit 0ba690
       (5*(num_chunks + old_num_chunks)));
Packit 0ba690
   if (png_ptr->chunk_list != NULL)
Packit 0ba690
   {
Packit 0ba690
      png_memcpy(new_list, png_ptr->chunk_list,
Packit 0ba690
          (png_size_t)(5*old_num_chunks));
Packit 0ba690
      png_free(png_ptr, png_ptr->chunk_list);
Packit 0ba690
      png_ptr->chunk_list=NULL;
Packit 0ba690
   }
Packit 0ba690
   png_memcpy(new_list + 5*old_num_chunks, chunk_list,
Packit 0ba690
       (png_size_t)(5*num_chunks));
Packit 0ba690
   for (p = new_list + 5*old_num_chunks + 4, i = 0; i
Packit 0ba690
      *p=(png_byte)keep;
Packit 0ba690
   png_ptr->num_chunk_list = old_num_chunks + num_chunks;
Packit 0ba690
   png_ptr->chunk_list = new_list;
Packit 0ba690
#ifdef PNG_FREE_ME_SUPPORTED
Packit 0ba690
   png_ptr->free_me |= PNG_FREE_LIST;
Packit 0ba690
#endif
Packit 0ba690
}
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
Packit 0ba690
   png_user_chunk_ptr read_user_chunk_fn)
Packit 0ba690
{
Packit 0ba690
   png_debug(1, "in png_set_read_user_chunk_fn");
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL)
Packit 0ba690
      return;
Packit 0ba690
Packit 0ba690
   png_ptr->read_user_chunk_fn = read_user_chunk_fn;
Packit 0ba690
   png_ptr->user_chunk_ptr = user_chunk_ptr;
Packit 0ba690
}
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
#ifdef PNG_INFO_IMAGE_SUPPORTED
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
Packit 0ba690
{
Packit 0ba690
   png_debug1(1, "in %s storage function", "rows");
Packit 0ba690
Packit 0ba690
   if (png_ptr == NULL || info_ptr == NULL)
Packit 0ba690
      return;
Packit 0ba690
Packit 0ba690
   if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
Packit 0ba690
      png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
Packit 0ba690
   info_ptr->row_pointers = row_pointers;
Packit 0ba690
   if (row_pointers)
Packit 0ba690
      info_ptr->valid |= PNG_INFO_IDAT;
Packit 0ba690
}
Packit 0ba690
#endif
Packit 0ba690
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_compression_buffer_size(png_structp png_ptr,
Packit 0ba690
    png_uint_32 size)
Packit 0ba690
{
Packit 0ba690
    if (png_ptr == NULL)
Packit 0ba690
       return;
Packit 0ba690
    png_free(png_ptr, png_ptr->zbuf);
Packit 0ba690
    png_ptr->zbuf_size = (png_size_t)size;
Packit 0ba690
    png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
Packit 0ba690
    png_ptr->zstream.next_out = png_ptr->zbuf;
Packit 0ba690
    png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
Packit 0ba690
}
Packit 0ba690
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
Packit 0ba690
{
Packit 0ba690
   if (png_ptr && info_ptr)
Packit 0ba690
      info_ptr->valid &= ~mask;
Packit 0ba690
}
Packit 0ba690
Packit 0ba690
Packit 0ba690
#ifndef PNG_1_0_X
Packit 0ba690
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
Packit 0ba690
/* Function was added to libpng 1.2.0 and should always exist by default */
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
Packit 0ba690
{
Packit 0ba690
/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
Packit 0ba690
    if (png_ptr != NULL)
Packit 0ba690
    png_ptr->asm_flags = 0;
Packit 0ba690
    PNG_UNUSED(asm_flags) /* Quiet the compiler */
Packit 0ba690
}
Packit 0ba690
Packit 0ba690
/* This function was added to libpng 1.2.0 */
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_mmx_thresholds (png_structp png_ptr,
Packit 0ba690
                        png_byte mmx_bitdepth_threshold,
Packit 0ba690
                        png_uint_32 mmx_rowbytes_threshold)
Packit 0ba690
{
Packit 0ba690
/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
Packit 0ba690
    if (png_ptr == NULL)
Packit 0ba690
       return;
Packit 0ba690
    /* Quiet the compiler */
Packit 0ba690
    PNG_UNUSED(mmx_bitdepth_threshold)
Packit 0ba690
    PNG_UNUSED(mmx_rowbytes_threshold)
Packit 0ba690
}
Packit 0ba690
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
Packit 0ba690
Packit 0ba690
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
Packit 0ba690
/* This function was added to libpng 1.2.6 */
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
Packit 0ba690
    png_uint_32 user_height_max)
Packit 0ba690
{
Packit 0ba690
   /* Images with dimensions larger than these limits will be
Packit 0ba690
    * rejected by png_set_IHDR().  To accept any PNG datastream
Packit 0ba690
    * regardless of dimensions, set both limits to 0x7fffffffL.
Packit 0ba690
    */
Packit 0ba690
   if (png_ptr == NULL)
Packit 0ba690
      return;
Packit 0ba690
   png_ptr->user_width_max = user_width_max;
Packit 0ba690
   png_ptr->user_height_max = user_height_max;
Packit 0ba690
}
Packit 0ba690
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
Packit 0ba690
Packit 0ba690
Packit 0ba690
#ifdef PNG_BENIGN_ERRORS_SUPPORTED
Packit 0ba690
void PNGAPI
Packit 0ba690
png_set_benign_errors(png_structp png_ptr, int allowed)
Packit 0ba690
{
Packit 0ba690
   png_debug(1, "in png_set_benign_errors");
Packit 0ba690
Packit 0ba690
   if (allowed)
Packit 0ba690
      png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
Packit 0ba690
   else
Packit 0ba690
      png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;
Packit 0ba690
}
Packit 0ba690
#endif /* PNG_BENIGN_ERRORS_SUPPORTED */
Packit 0ba690
#endif /* ?PNG_1_0_X */
Packit 0ba690
Packit 0ba690
#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
Packit 0ba690
    defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
Packit 0ba690
/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
Packit 0ba690
 * and if invalid, correct the keyword rather than discarding the entire
Packit 0ba690
 * chunk.  The PNG 1.0 specification requires keywords 1-79 characters in
Packit 0ba690
 * length, forbids leading or trailing whitespace, multiple internal spaces,
Packit 0ba690
 * and the non-break space (0x80) from ISO 8859-1.  Returns keyword length.
Packit 0ba690
 *
Packit 0ba690
 * The new_key is allocated to hold the corrected keyword and must be freed
Packit 0ba690
 * by the calling routine.  This avoids problems with trying to write to
Packit 0ba690
 * static keywords without having to have duplicate copies of the strings.
Packit 0ba690
 */
Packit 0ba690
png_size_t /* PRIVATE */
Packit 0ba690
png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
Packit 0ba690
{
Packit 0ba690
   png_size_t key_len;
Packit 0ba690
   png_charp kp, dp;
Packit 0ba690
   int kflag;
Packit 0ba690
   int kwarn=0;
Packit 0ba690
Packit 0ba690
   png_debug(1, "in png_check_keyword");
Packit 0ba690
Packit 0ba690
   *new_key = NULL;
Packit 0ba690
Packit 0ba690
   if (key == NULL || (key_len = png_strlen(key)) == 0)
Packit 0ba690
   {
Packit 0ba690
      png_warning(png_ptr, "zero length keyword");
Packit 0ba690
      return ((png_size_t)0);
Packit 0ba690
   }
Packit 0ba690
Packit 0ba690
   png_debug1(2, "Keyword to be checked is '%s'", key);
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   *new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2));
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   if (*new_key == NULL)
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   {
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      png_warning(png_ptr, "Out of memory while procesing keyword");
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      return ((png_size_t)0);
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   }
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   /* Replace non-printing characters with a blank and print a warning */
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   for (kp = key, dp = *new_key; *kp != '\0'; kp++, dp++)
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   {
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      if ((png_byte)*kp < 0x20 ||
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         ((png_byte)*kp > 0x7E && (png_byte)*kp < 0xA1))
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      {
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#if defined(PNG_STDIO_SUPPORTED) && !defined(_WIN32_WCE)
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         char msg[40];
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         png_snprintf(msg, 40,
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           "invalid keyword character 0x%02X", (png_byte)*kp);
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         png_warning(png_ptr, msg);
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#else
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         png_warning(png_ptr, "invalid character in keyword");
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#endif
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         *dp = ' ';
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      }
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      else
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      {
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         *dp = *kp;
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      }
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   }
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   *dp = '\0';
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   /* Remove any trailing white space. */
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   kp = *new_key + key_len - 1;
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   if (*kp == ' ')
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   {
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      png_warning(png_ptr, "trailing spaces removed from keyword");
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      while (key_len && *kp == ' ')
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      {
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         *(kp--) = '\0';
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         key_len--;
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      }
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   }
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   /* Remove any leading white space. */
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   kp = *new_key;
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   if (*kp == ' ')
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   {
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      png_warning(png_ptr, "leading spaces removed from keyword");
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      while (*kp == ' ')
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      {
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         kp++;
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         key_len--;
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      }
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   }
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   png_debug1(2, "Checking for multiple internal spaces in '%s'", kp);
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   /* Remove multiple internal spaces. */
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   for (kflag = 0, dp = *new_key; *kp != '\0'; kp++)
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   {
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      if (*kp == ' ' && kflag == 0)
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      {
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         *(dp++) = *kp;
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         kflag = 1;
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      }
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      else if (*kp == ' ')
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      {
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         key_len--;
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         kwarn=1;
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      }
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      else
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      {
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         *(dp++) = *kp;
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         kflag = 0;
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      }
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   }
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   *dp = '\0';
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   if (kwarn)
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      png_warning(png_ptr, "extra interior spaces removed from keyword");
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   if (key_len == 0)
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   {
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      png_free(png_ptr, *new_key);
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       *new_key=NULL;
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      png_warning(png_ptr, "Zero length keyword");
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   }
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   if (key_len > 79)
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   {
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      png_warning(png_ptr, "keyword length must be 1 - 79 characters");
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      (*new_key)[79] = '\0';
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      key_len = 79;
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   }
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   return (key_len);
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}
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#endif /* WRITE_TEXT || WRITE_pCAL) || WRITE_iCCP || WRITE_sPLT */
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#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */