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src/Source/LibPNG/pngtest.c  view on Meta::CPAN

#ifndef PNG_DEBUG
#  define PNG_DEBUG 0
#endif

#if PNG_DEBUG > 1
#  define pngtest_debug(m)        ((void)fprintf(stderr, m "\n"))
#  define pngtest_debug1(m,p1)    ((void)fprintf(stderr, m "\n", p1))
#  define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2))
#else
#  define pngtest_debug(m)        ((void)0)
#  define pngtest_debug1(m,p1)    ((void)0)
#  define pngtest_debug2(m,p1,p2) ((void)0)
#endif

#if !PNG_DEBUG
#  define SINGLE_ROWBUF_ALLOC  /* Makes buffer overruns easier to nail */
#endif

/* Turn on CPU timing
#define PNGTEST_TIMING
*/

#ifndef PNG_FLOATING_POINT_SUPPORTED
#undef PNGTEST_TIMING
#endif

#ifdef PNGTEST_TIMING
static float t_start, t_stop, t_decode, t_encode, t_misc;
#include <time.h>
#endif

#ifdef PNG_TIME_RFC1123_SUPPORTED
#define PNG_tIME_STRING_LENGTH 29
static int tIME_chunk_present = 0;
static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
#endif

static int verbose = 0;
static int strict = 0;
static int relaxed = 0;
static int unsupported_chunks = 0; /* chunk unsupported by libpng in input */
static int error_count = 0; /* count calls to png_error */
static int warning_count = 0; /* count calls to png_warning */

/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
#ifndef png_jmpbuf
#  define png_jmpbuf(png_ptr) png_ptr->jmpbuf
#endif

/* Defines for unknown chunk handling if required. */
#ifndef PNG_HANDLE_CHUNK_ALWAYS
#  define PNG_HANDLE_CHUNK_ALWAYS       3
#endif
#ifndef PNG_HANDLE_CHUNK_IF_SAFE
#  define PNG_HANDLE_CHUNK_IF_SAFE      2
#endif

/* Utility to save typing/errors, the argument must be a name */
#define MEMZERO(var) ((void)memset(&var, 0, sizeof var))

/* Example of using row callbacks to make a simple progress meter */
static int status_pass = 1;
static int status_dots_requested = 0;
static int status_dots = 1;

static void PNGCBAPI
read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
{
   if (png_ptr == NULL || row_number > PNG_UINT_31_MAX)
      return;

   if (status_pass != pass)
   {
      fprintf(stdout, "\n Pass %d: ", pass);
      status_pass = pass;
      status_dots = 31;
   }

   status_dots--;

   if (status_dots == 0)
   {
      fprintf(stdout, "\n         ");
      status_dots=30;
   }

   fprintf(stdout, "r");
}

#ifdef PNG_WRITE_SUPPORTED
static void PNGCBAPI
write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
{
   if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7)
      return;

   fprintf(stdout, "w");
}
#endif


#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
/* Example of using user transform callback (we don't transform anything,
 * but merely examine the row filters.  We set this to 256 rather than
 * 5 in case illegal filter values are present.)
 */
static png_uint_32 filters_used[256];
static void PNGCBAPI
count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data)
{
   if (png_ptr != NULL && row_info != NULL)
      ++filters_used[*(data - 1)];
}
#endif

#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
/* Example of using user transform callback (we don't transform anything,
 * but merely count the zero samples)
 */

static png_uint_32 zero_samples;