changelog.txt

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

char *ip, *op, *dot;
char in_string[STR_BUF_SIZE];
char prog_string[STR_BUF_SIZE];
char out_string[STR_BUF_SIZE];
char in_extension[STR_BUF_SIZE];
static int text_inputs = 0;
int text_where[10];           /* 0: no text; 1: before PLTE; 2: after PLTE */
int text_compression[10];     /* -1: uncompressed tEXt; 0: compressed zTXt
                                  1: uncompressed iTXt; 2: compressed iTXt */
char text_text[20480];        /* It would be nice to png_malloc this, but we
                               * don't have a png_ptr yet when we need it. */
char text_keyword[800];

/* PNG_iTXt_SUPPORTED */
char text_lang[800];
char text_lang_key[800];

/* PNG_iCCP_SUPPORTED */
int iccp_length = 0;
char *iccp_text;
char *iccp_file;
char iccp_name[80];

int best;

char buffer[256];

/* Set up the "cexcept" Try/Throw/Catch exception handler. */
#include "cexcept.h"
define_exception_type(const char *);
extern struct exception_context the_exception_context[1];
struct exception_context the_exception_context[1];
png_const_charp msg;

static png_uint_32 total_input_length = 0;
static png_uint_32 total_output_length = 0;
static int pngcrush_mode = DEFAULT_MODE;
static int resolution = 0;
static int remove_chunks = 0;
static int output_color_type;
static int output_bit_depth;
static int force_output_color_type = 8;
static int force_output_bit_depth = 0;
static int input_color_type;
static int input_bit_depth;
static int trial;
static int first_trial = 0;
static int verbose = 1;
static int fix = 0;
static int things_have_changed = 0;
static int global_things_have_changed = 0;
static int default_compression_window = 15;
static int force_compression_window = 0;
static int compression_mem_level = 9;
static int final_method = 0;
static int brute_force = 0;
static int brute_force_level = 0;
static int brute_force_filter = 0;
static int brute_force_strategy = 0;
static int brute_force_levels[10] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
static int brute_force_filters[6] = { 1, 1, 1, 1, 1, 1 };
#ifdef Z_RLE
static int brute_force_strategies[NUM_STRATEGIES] = { 1, 1, 1, 1 };
#else
static int brute_force_strategies[NUM_STRATEGIES] = { 1, 1, 1 };
#endif
static int method = 10;
static int pauses = 0;
static int nosave = 0;
static int nofilecheck = 0;
#ifdef PNGCRUSH_LOCO
static int new_mng = 0;
#endif
static png_bytep row_buf;
#ifdef PNGCRUSH_MULTIPLE_ROWS
static png_bytepp row_pointers;
#endif
static int z_strategy;
static int best_of_three;
static int methods_specified = 0;
static int intent = -1;
static int ster_mode = -1;
static int new_time_stamp = 1;
static int plte_len = -1;
#ifdef PNG_FIXED_POINT_SUPPORTED
static int specified_gamma = 0;
static int image_specified_gamma = 0;
static int force_specified_gamma = 0;
#else
static double specified_gamma = 0.0;
static double image_specified_gamma = 0;
static double force_specified_gamma = 0.0;
#endif
static int double_gamma = 0;

static int names;

static int have_trns = 0;
static png_uint_16 trns_index = 0;
static png_uint_16 trns_red = 0;
static png_uint_16 trns_green = 0;
static png_uint_16 trns_blue = 0;
static png_uint_16 trns_gray = 0;

static png_byte trns_array[256];
static png_byte trans_in[256];
static png_uint_16 num_trans_in;

static int have_bkgd = 0;
static png_uint_16 bkgd_red = 0;
static png_uint_16 bkgd_green = 0;
static png_uint_16 bkgd_blue = 0;

static png_colorp palette;
static int num_palette;

#ifdef REORDER_PALETTE
static png_byte palette_reorder[256];
#endif

static png_structp read_ptr, write_ptr, mng_ptr;
static png_infop read_info_ptr, write_info_ptr;
static png_infop end_info_ptr;
static png_infop write_end_info_ptr;
static FILE *fpin, *fpout, *mng_out;
png_uint_32 measure_idats(FILE * fpin);
#ifdef PNGCRUSH_LOCO
static int do_loco = 0;
static int input_format = 0;    /* 0: PNG  1: MNG */
static int output_format = 0;
#endif
static int do_color_count;
static int reduction_ok = 0;
#ifdef PNGCRUSH_COUNT_COLORS
int count_colors(FILE * fpin);
static int num_rgba, reduce_to_gray, it_is_opaque;
#endif
png_uint_32 png_measure_idat(png_structp png_ptr);

static png_uint_32 idat_length[MAX_METHODSP1];
static int filter_type, zlib_level;
static png_bytep png_row_filters = NULL;
static float t_start, t_stop, t_decode, t_encode, t_misc;

static png_uint_32 max_idat_size = MAX_IDAT_SIZE; /* increases the IDAT size */
static png_uint_32 crushed_idat_size = 0x3ffffffL;
static int already_crushed = 0;
int ia;


/* prototypes */
static void png_cexcept_error(png_structp png_ptr, png_const_charp msg);

void PNGAPI png_default_read_data(png_structp png_ptr, png_bytep data,
  png_size_t length);

void png_read_transform_info(png_structp png_ptr, png_infop info_ptr);

void PNGAPI png_default_write_data(png_structp png_ptr, png_bytep data,
  png_size_t length);

void png_reset_crc(png_structp png_ptr);
void png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length);
void png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length);
int png_crc_error(png_structp png_ptr);
int png_crc_finish(png_structp png_ptr, png_uint_32 skip);

void png_save_uint_32(png_bytep buf, png_uint_32 i);

#ifdef PNG_USER_MEM_SUPPORTED
png_voidp png_debug_malloc(png_structp png_ptr, png_uint_32 size);
void png_debug_free(png_structp png_ptr, png_voidp ptr);
#endif

void png_crush_pause(void);

#ifdef __riscos
static int fileexists(const char *name)
static int filesize(const char *name)
static int mkdir(const char *name, int ignored)
static void setfiletype(const char *name)
#endif

int keep_unknown_chunk(png_const_charp name, char *argv[]);
int keep_chunk(png_const_charp name, char *argv[]);
void show_result(void);
png_uint_32 measure_idats(FILE * fpin);
png_uint_32 png_measure_idat(png_structp png_ptr);

#ifdef PNGCRUSH_COUNT_COLORS
int count_colors(FILE * fpin);
#endif
void print_version_info(void);
void print_usage(int retval);


#if (!defined(PNGCRUSH_H))
/* ============================================================
 * We aren't using the bundled libpng functions, so we must
 * reproduce the libpng routines that aren't exported by libpng
 * ============================================================
 */

#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */
png_uint_32 /* PRIVATE */
png_get_uint_32(png_bytep buf)
{
   png_uint_32 i = ((png_uint_32)(*buf) << 24) +
      ((png_uint_32)(*(buf + 1)) << 16) +
      ((png_uint_32)(*(buf + 2)) << 8) +
      (png_uint_32)(*(buf + 3));

   return (i);
}
#else
#  define png_get_uint_32(buf) ( *((png_uint_32p) (buf)))
#endif
png_uint_32 /* PRIVATE */
png_get_uint_31(png_structp png_ptr, png_bytep buf)
{
   png_uint_32 i = png_get_uint_32(buf);
   if (i > PNG_UINT_31_MAX)
     png_error(png_ptr, "PNG unsigned integer out of range.\n");
   return (i);
}
void /* PRIVATE */
png_save_uint_32(png_bytep buf, png_uint_32 i)
{
   buf[0] = (png_byte)((i >> 24) & 0xff);
   buf[1] = (png_byte)((i >> 16) & 0xff);
   buf[2] = (png_byte)((i >> 8) & 0xff);
   buf[3] = (png_byte)(i & 0xff);
}

/* Reset the CRC variable to 32 bits of 1's.  Care must be taken
 * in case CRC is > 32 bits to leave the top bits 0.
 */
void /* PRIVATE */
png_reset_crc(png_structp png_ptr)
{
   png_ptr->crc = crc32(0, Z_NULL, 0);
}
/* Calculate the CRC over a section of data.  We can only pass as
 * much data to this routine as the largest single buffer size.  We
 * also check that this data will actually be used before going to the
 * trouble of calculating it.
 */
void /* PRIVATE */
png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length)
{
   int need_crc = 1;

   if (png_ptr->chunk_name[0] & 0x20)                     /* ancillary */
   {
      if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
          (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
         need_crc = 0;
   }
   else                                                    /* critical */
   {
      if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
         need_crc = 0;
   }

   if (need_crc)
      png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length);
}

/* Read data, and (optionally) run it through the CRC. */
void /* PRIVATE */
png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length)
{
   png_default_read_data(png_ptr, buf, length);
   png_calculate_crc(png_ptr, buf, length);
}

/* Compare the CRC stored in the PNG file with that calculated by libpng from
   the data it has read thus far. */
int /* PRIVATE */
png_crc_error(png_structp png_ptr)
{
   png_byte crc_bytes[4];
   png_uint_32 crc;
   int need_crc = 1;

   if (png_ptr->chunk_name[0] & 0x20)                     /* ancillary */
   {
      if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
          (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
         need_crc = 0;
   }
   else                                                    /* critical */
   {
      if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
         need_crc = 0;
   }

   png_default_read_data(png_ptr, crc_bytes, 4);

   if (need_crc)
   {
      crc = png_get_uint_32(crc_bytes);
      return ((int)(crc != png_ptr->crc));
   }
   else
      return (0);
}

/* Optionally skip data and then check the CRC.  Depending on whether we
   are reading a ancillary or critical chunk, and how the program has set
   things up, we may calculate the CRC on the data and print a message.
   Returns '1' if there was a CRC error, '0' otherwise. */
int /* PRIVATE */
png_crc_finish(png_structp png_ptr, png_uint_32 skip)
{
   png_size_t i;
   png_size_t istop = png_ptr->zbuf_size;

   for (i = (png_size_t)skip; i > istop; i -= istop)
   {
      png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
   }
   if (i)
   {
      png_crc_read(png_ptr, png_ptr->zbuf, i);
   }

   if (png_crc_error(png_ptr))
   {
      if (((png_ptr->chunk_name[0] & 0x20) &&                /* Ancillary */
           !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) ||
          (!(png_ptr->chunk_name[0] & 0x20) &&             /* Critical  */
          (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE)))
      {
         png_chunk_warning(png_ptr, "CRC error");
      }
      else
      {
         png_chunk_error(png_ptr, "CRC error");
      }
      return (1);
   }

   return (0);
}

/* Modify the info structure to reflect the transformations.  The
 * info should be updated so a PNG file could be written with it,
 * assuming the transformations result in valid PNG data.
 */
void /* PRIVATE */
png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
{
   png_debug(1, "in png_read_transform_info\n");
#if defined(PNG_READ_EXPAND_SUPPORTED)
   if (png_ptr->transformations & PNG_EXPAND)
   {
      if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
      {
         if (png_ptr->num_trans)
            info_ptr->color_type = PNG_COLOR_TYPE_RGB_ALPHA;
         else
            info_ptr->color_type = PNG_COLOR_TYPE_RGB;
         info_ptr->bit_depth = 8;
         info_ptr->num_trans = 0;
      }
      else
      {
         if (png_ptr->num_trans)
            info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
         if (info_ptr->bit_depth < 8)
            info_ptr->bit_depth = 8;
         info_ptr->num_trans = 0;
      }
   }
#endif

#if defined(PNG_READ_BACKGROUND_SUPPORTED)
   if (png_ptr->transformations & PNG_BACKGROUND)
   {
      info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA;
      info_ptr->num_trans = 0;
      info_ptr->background = png_ptr->background;
   }
#endif

#if defined(PNG_READ_GAMMA_SUPPORTED)
   if (png_ptr->transformations & PNG_GAMMA)
   {
#ifdef PNG_FLOATING_POINT_SUPPORTED