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plt-scheme  4.2.1
Classes | Defines | Typedefs | Functions | Variables
pngtest.c File Reference
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "png.h"

Go to the source code of this file.

Classes

struct  memory_information

Defines

#define READFILE(file, data, length, check)   check=(png_size_t)fread(data,(png_size_t)1,length,file)
#define WRITEFILE(file, data, length, check)   check=(png_size_t)fwrite(data,(png_size_t)1, length, file)
#define FCLOSE(file)   fclose(file)
#define PNG_DEBUG   0
#define SINGLE_ROWBUF_ALLOC   /* makes buffer overruns easier to nail */
#define STDERR   stdout /* for DOS */
#define HANDLE_CHUNK_IF_SAFE   2
#define HANDLE_CHUNK_ALWAYS   3

Typedefs

typedef struct memory_information memory_information
typedef memory_information FARmemory_infop
typedef version_1_2_5 your_png_h_is_not_version_1_2_5

Functions

int test_one_file PNGARG ((PNG_CONST char *inname, PNG_CONST char *outname))
void read_row_callback (png_structp png_ptr, png_uint_32 row_number, int pass)
void write_row_callback (png_structp png_ptr, png_uint_32 row_number, int pass)
void count_filters (png_structp png_ptr, png_row_infop row_info, png_bytep data)
void count_zero_samples (png_structp png_ptr, png_row_infop row_info, png_bytep data)
png_voidp png_debug_malloc PNGARG ((png_structp png_ptr, png_uint_32 size))
void png_debug_free PNGARG ((png_structp png_ptr, png_voidp ptr))
png_voidp png_debug_malloc (png_structp png_ptr, png_uint_32 size)
void png_debug_free (png_structp png_ptr, png_voidp ptr)
int test_one_file (PNG_CONST char *inname, PNG_CONST char *outname)
int main (int argc, char *argv[])

Variables

static int tIME_chunk_present = 0
static char tIME_string [30] = "no tIME chunk present in file"
static int verbose = 0
static int status_pass = 1
static int status_dots_requested = 0
static int status_dots = 1
static png_uint_32 filters_used [256]
static png_uint_32 zero_samples
static int wrote_question = 0
static memory_infop pinformation = NULL
static int current_allocation = 0
static int maximum_allocation = 0
static int total_allocation = 0
static int num_allocations = 0
static PNG_CONST char * inname = "pngtest.png"
static PNG_CONST char * outname = "pngout.png"

Class Documentation

struct memory_information

Definition at line 483 of file pngtest.c.

Collaboration diagram for memory_information:
Class Members
struct memory_information * next
png_voidp pointer
png_uint_32 size

Define Documentation

#define FCLOSE (   file)    fclose(file)

Definition at line 50 of file pngtest.c.

#define HANDLE_CHUNK_ALWAYS   3
#define HANDLE_CHUNK_IF_SAFE   2
#define PNG_DEBUG   0

Definition at line 63 of file pngtest.c.

#define READFILE (   file,
  data,
  length,
  check 
)    check=(png_size_t)fread(data,(png_size_t)1,length,file)

Definition at line 46 of file pngtest.c.

#define SINGLE_ROWBUF_ALLOC   /* makes buffer overruns easier to nail */

Definition at line 67 of file pngtest.c.

#define STDERR   stdout /* for DOS */

Definition at line 112 of file pngtest.c.

#define WRITEFILE (   file,
  data,
  length,
  check 
)    check=(png_size_t)fwrite(data,(png_size_t)1, length, file)

Definition at line 48 of file pngtest.c.


Typedef Documentation

Definition at line 489 of file pngtest.c.

Definition at line 1541 of file pngtest.c.


Function Documentation

void count_filters ( png_structp  png_ptr,
png_row_infop  row_info,
png_bytep  data 
)

Definition at line 176 of file pngtest.c.

{
    if(png_ptr != NULL && row_info != NULL)
      ++filters_used[*(data-1)];
}

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void count_zero_samples ( png_structp  png_ptr,
png_row_infop  row_info,
png_bytep  data 
)

Definition at line 198 of file pngtest.c.

{
   png_bytep dp = data;
   if(png_ptr == NULL)return;

   /* contents of row_info:
    *  png_uint_32 width      width of row
    *  png_uint_32 rowbytes   number of bytes in row
    *  png_byte color_type    color type of pixels
    *  png_byte bit_depth     bit depth of samples
    *  png_byte channels      number of channels (1-4)
    *  png_byte pixel_depth   bits per pixel (depth*channels)
    */


    /* counts the number of zero samples (or zero pixels if color_type is 3 */

    if(row_info->color_type == 0 || row_info->color_type == 3)
    {
       int pos=0;
       png_uint_32 n, nstop;
       for (n=0, nstop=row_info->width; n<nstop; n++)
       {
          if(row_info->bit_depth == 1)
          {
             if(((*dp << pos++ ) & 0x80) == 0) zero_samples++;
             if(pos == 8)
             {
                pos = 0;
                dp++;
             }
          }
          if(row_info->bit_depth == 2)
          {
             if(((*dp << (pos+=2)) & 0xc0) == 0) zero_samples++;
             if(pos == 8)
             {
                pos = 0;
                dp++;
             }
          }
          if(row_info->bit_depth == 4)
          {
             if(((*dp << (pos+=4)) & 0xf0) == 0) zero_samples++;
             if(pos == 8)
             {
                pos = 0;
                dp++;
             }
          }
          if(row_info->bit_depth == 8)
             if(*dp++ == 0) zero_samples++;
          if(row_info->bit_depth == 16)
          {
             if((*dp | *(dp+1)) == 0) zero_samples++;
             dp+=2;
          }
       }
    }
    else /* other color types */
    {
       png_uint_32 n, nstop;
       int channel;
       int color_channels = row_info->channels;
       if(row_info->color_type > 3)color_channels--;

       for (n=0, nstop=row_info->width; n<nstop; n++)
       {
          for (channel = 0; channel < color_channels; channel++)
          {
             if(row_info->bit_depth == 8)
                if(*dp++ == 0) zero_samples++;
             if(row_info->bit_depth == 16)
             {
                if((*dp | *(dp+1)) == 0) zero_samples++;
                dp+=2;
             }
          }
          if(row_info->color_type > 3)
          {
             dp++;
             if(row_info->bit_depth == 16)dp++;
          }
       }
    }
}

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int main ( int  argc,
char *  argv[] 
)

Definition at line 1295 of file pngtest.c.

{
   int multiple = 0;
   int ierror = 0;

   fprintf(STDERR, "Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
   fprintf(STDERR, "   with zlib   version %s\n", ZLIB_VERSION);
   fprintf(STDERR,"%s",png_get_copyright(NULL));
   /* Show the version of libpng used in building the library */
   fprintf(STDERR," library (%lu):%s", png_access_version_number(),
      png_get_header_version(NULL));
   /* Show the version of libpng used in building the application */
   fprintf(STDERR," pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
      PNG_HEADER_VERSION_STRING);
   fprintf(STDERR," sizeof(png_struct)=%ld, sizeof(png_info)=%ld\n",
                    (long)sizeof(png_struct), (long)sizeof(png_info));

   /* Do some consistency checking on the memory allocation settings, I'm
      not sure this matters, but it is nice to know, the first of these
      tests should be impossible because of the way the macros are set
      in pngconf.h */
#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
      fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
#endif
   /* I think the following can happen. */
#if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
      fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n");
#endif

   if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING))
   {
      fprintf(STDERR,
         "Warning: versions are different between png.h and png.c\n");
      fprintf(STDERR, "  png.h version: %s\n", PNG_LIBPNG_VER_STRING);
      fprintf(STDERR, "  png.c version: %s\n\n", png_libpng_ver);
      ++ierror;
   }

   if (argc > 1)
   {
      if (strcmp(argv[1], "-m") == 0)
      {
         multiple = 1;
         status_dots_requested = 0;
      }
      else if (strcmp(argv[1], "-mv") == 0 ||
               strcmp(argv[1], "-vm") == 0 )
      {
         multiple = 1;
         verbose = 1;
         status_dots_requested = 1;
      }
      else if (strcmp(argv[1], "-v") == 0)
      {
         verbose = 1;
         status_dots_requested = 1;
         inname = argv[2];
      }
      else
      {
         inname = argv[1];
         status_dots_requested = 0;
      }
   }

   if (!multiple && argc == 3+verbose)
     outname = argv[2+verbose];

   if ((!multiple && argc > 3+verbose) || (multiple && argc < 2))
   {
     fprintf(STDERR,
       "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
        argv[0], argv[0]);
     fprintf(STDERR,
       "  reads/writes one PNG file (without -m) or multiple files (-m)\n");
     fprintf(STDERR,
       "  with -m %s is used as a temporary file\n", outname);
     exit(1);
   }

   if (multiple)
   {
      int i;
#ifdef PNG_USER_MEM_SUPPORTED
      int allocation_now = current_allocation;
#endif
      for (i=2; i<argc; ++i)
      {
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
         int k;
#endif
         int kerror;
         fprintf(STDERR, "Testing %s:",argv[i]);
         kerror = test_one_file(argv[i], outname);
         if (kerror == 0)
         {
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
            fprintf(STDERR, "\n PASS (%lu zero samples)\n",zero_samples);
#else
            fprintf(STDERR, " PASS\n");
#endif
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
            for (k=0; k<256; k++)
               if(filters_used[k])
                  fprintf(STDERR, " Filter %d was used %lu times\n",
                     k,filters_used[k]);
#endif
#if defined(PNG_TIME_RFC1123_SUPPORTED)
         if(tIME_chunk_present != 0)
            fprintf(STDERR, " tIME = %s\n",tIME_string);
         tIME_chunk_present = 0;
#endif /* PNG_TIME_RFC1123_SUPPORTED */
         }
         else
         {
            fprintf(STDERR, " FAIL\n");
            ierror += kerror;
         }
#ifdef PNG_USER_MEM_SUPPORTED
         if (allocation_now != current_allocation)
            fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
               current_allocation-allocation_now);
         if (current_allocation != 0)
         {
            memory_infop pinfo = pinformation;

            fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
               current_allocation);
            while (pinfo != NULL)
            {
               fprintf(STDERR, " %lu bytes at %x\n", pinfo->size, 
                 (unsigned int) pinfo->pointer);
               pinfo = pinfo->next;
            }
         }
#endif
      }
#ifdef PNG_USER_MEM_SUPPORTED
         fprintf(STDERR, " Current memory allocation: %10d bytes\n",
            current_allocation);
         fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
            maximum_allocation);
         fprintf(STDERR, " Total   memory allocation: %10d bytes\n",
            total_allocation);
         fprintf(STDERR, "     Number of allocations: %10d\n",
            num_allocations);
#endif
   }
   else
   {
      int i;
      for (i=0; i<3; ++i)
      {
         int kerror;
#ifdef PNG_USER_MEM_SUPPORTED
         int allocation_now = current_allocation;
#endif
         if (i == 1) status_dots_requested = 1;
         else if(verbose == 0)status_dots_requested = 0;
         if (i == 0 || verbose == 1 || ierror != 0)
            fprintf(STDERR, "Testing %s:",inname);
         kerror = test_one_file(inname, outname);
         if(kerror == 0)
         {
            if(verbose == 1 || i == 2)
            {
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
                int k;
#endif
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
                fprintf(STDERR, "\n PASS (%lu zero samples)\n",zero_samples);
#else
                fprintf(STDERR, " PASS\n");
#endif
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
                for (k=0; k<256; k++)
                   if(filters_used[k])
                      fprintf(STDERR, " Filter %d was used %lu times\n",
                         k,filters_used[k]);
#endif
#if defined(PNG_TIME_RFC1123_SUPPORTED)
             if(tIME_chunk_present != 0)
                fprintf(STDERR, " tIME = %s\n",tIME_string);
#endif /* PNG_TIME_RFC1123_SUPPORTED */
            }
         }
         else
         {
            if(verbose == 0 && i != 2)
               fprintf(STDERR, "Testing %s:",inname);
            fprintf(STDERR, " FAIL\n");
            ierror += kerror;
         }
#ifdef PNG_USER_MEM_SUPPORTED
         if (allocation_now != current_allocation)
             fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
               current_allocation-allocation_now);
         if (current_allocation != 0)
         {
             memory_infop pinfo = pinformation;

             fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
                current_allocation);
             while (pinfo != NULL)
             {
                fprintf(STDERR," %lu bytes at %x\n",
                   pinfo->size, (unsigned int)pinfo->pointer);
                pinfo = pinfo->next;
             }
          }
#endif
       }
#ifdef PNG_USER_MEM_SUPPORTED
       fprintf(STDERR, " Current memory allocation: %10d bytes\n",
          current_allocation);
       fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
          maximum_allocation);
       fprintf(STDERR, " Total   memory allocation: %10d bytes\n",
          total_allocation);
       fprintf(STDERR, "     Number of allocations: %10d\n",
            num_allocations);
#endif
   }

#ifdef PNGTEST_TIMING
   t_stop = (float)clock();
   t_misc += (t_stop - t_start);
   t_start = t_stop;
   fprintf(STDERR," CPU time used = %.3f seconds",
      (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
   fprintf(STDERR," (decoding %.3f,\n",
      t_decode/(float)CLOCKS_PER_SEC);
   fprintf(STDERR,"        encoding %.3f ,",
      t_encode/(float)CLOCKS_PER_SEC);
   fprintf(STDERR," other %.3f seconds)\n\n",
      t_misc/(float)CLOCKS_PER_SEC);
#endif

   if (ierror == 0)
      fprintf(STDERR, "libpng passes test\n");
   else
      fprintf(STDERR, "libpng FAILS test\n");
   return (int)(ierror != 0);
}

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void png_debug_free ( png_structp  png_ptr,
png_voidp  ptr 
)

Definition at line 537 of file pngtest.c.

{
   if (png_ptr == NULL)
      fprintf(STDERR, "NULL pointer to png_debug_free.\n");
   if (ptr == 0)
   {
#if 0 /* This happens all the time. */
      fprintf(STDERR, "WARNING: freeing NULL pointer\n");
#endif
      return;
   }

   /* Unlink the element from the list. */
   {
      memory_infop FAR *ppinfo = &pinformation;
      for (;;)
      {
         memory_infop pinfo = *ppinfo;
         if (pinfo->pointer == ptr)
         {
            *ppinfo = pinfo->next;
            current_allocation -= pinfo->size;
            if (current_allocation < 0)
               fprintf(STDERR, "Duplicate free of memory\n");
            /* We must free the list element too, but first kill
               the memory that is to be freed. */
            png_memset(ptr, 0x55, pinfo->size);
            png_free_default(png_ptr, pinfo);
            pinfo=NULL;
            break;
         }
         if (pinfo->next == NULL)
         {
            fprintf(STDERR, "Pointer %x not found\n", (unsigned int)ptr);
            break;
         }
         ppinfo = &pinfo->next;
      }
   }

   /* Finally free the data. */
#if PNG_DEBUG
   if(verbose)
      printf("Freeing %x\n",ptr);
#endif
   png_free_default(png_ptr, ptr);
   ptr=NULL;
}

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Definition at line 501 of file pngtest.c.

{

   /* png_malloc has already tested for NULL; png_create_struct calls
      png_debug_malloc directly, with png_ptr == NULL which is OK */

   if (size == 0)
      return (NULL);

   /* This calls the library allocator twice, once to get the requested
      buffer and once to get a new free list entry. */
   {
      memory_infop pinfo = (memory_infop)png_malloc_default(png_ptr,
         (png_uint_32)sizeof *pinfo);
      pinfo->size = size;
      current_allocation += size;
      total_allocation += size;
      num_allocations ++;
      if (current_allocation > maximum_allocation)
         maximum_allocation = current_allocation;
      pinfo->pointer = (png_voidp)png_malloc_default(png_ptr, size);
      pinfo->next = pinformation;
      pinformation = pinfo;
      /* Make sure the caller isn't assuming zeroed memory. */
      png_memset(pinfo->pointer, 0xdd, pinfo->size);
#if PNG_DEBUG
      if(verbose)
         printf("png_malloc %lu bytes at %x\n",size,pinfo->pointer);
#endif
      assert(pinfo->size != 12345678);
      return (png_voidp)(pinfo->pointer);
   }
}

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void read_row_callback ( png_structp  png_ptr,
png_uint_32  row_number,
int  pass 
)

Definition at line 128 of file pngtest.c.

{
    if(png_ptr == NULL || row_number > PNG_MAX_UINT) 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");
}

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int test_one_file ( PNG_CONST char *  inname,
PNG_CONST char *  outname 
)

Definition at line 590 of file pngtest.c.

{
   static png_FILE_p fpin;
   static png_FILE_p fpout;  /* "static" prevents setjmp corruption */
   png_structp read_ptr;
   png_infop read_info_ptr, end_info_ptr;
#ifdef PNG_WRITE_SUPPORTED
   png_structp write_ptr;
   png_infop write_info_ptr;
   png_infop write_end_info_ptr;
#else
   png_structp write_ptr = NULL;
   png_infop write_info_ptr = NULL;
   png_infop write_end_info_ptr = NULL;
#endif
   png_bytep row_buf;
   png_uint_32 y;
   png_uint_32 width, height;
   int num_pass, pass;
   int bit_depth, color_type;
#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
   jmp_buf jmpbuf;
#endif
#endif

#if defined(_WIN32_WCE)
   TCHAR path[MAX_PATH];
#endif
   char inbuf[256], outbuf[256];

   row_buf = NULL;

#if defined(_WIN32_WCE)
   MultiByteToWideChar(CP_ACP, 0, inname, -1, path, MAX_PATH);
   if ((fpin = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE)
#else
   if ((fpin = fopen(inname, "rb")) == NULL)
#endif
   {
      fprintf(STDERR, "Could not find input file %s\n", inname);
      return (1);
   }

#if defined(_WIN32_WCE)
   MultiByteToWideChar(CP_ACP, 0, outname, -1, path, MAX_PATH);
   if ((fpout = CreateFile(path, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, NULL)) == INVALID_HANDLE_VALUE)
#else
   if ((fpout = fopen(outname, "wb")) == NULL)
#endif
   {
      fprintf(STDERR, "Could not open output file %s\n", outname);
      FCLOSE(fpin);
      return (1);
   }

   png_debug(0, "Allocating read and write structures\n");
#ifdef PNG_USER_MEM_SUPPORTED
   read_ptr = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
      png_error_ptr_NULL, png_error_ptr_NULL, png_voidp_NULL,
      (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
#else
   read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
      png_error_ptr_NULL, png_error_ptr_NULL);
#endif
#if defined(PNG_NO_STDIO)
   png_set_error_fn(read_ptr, (png_voidp)inname, pngtest_error,
       pngtest_warning);
#endif
#ifdef PNG_WRITE_SUPPORTED
#ifdef PNG_USER_MEM_SUPPORTED
   write_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
      png_error_ptr_NULL, png_error_ptr_NULL, png_voidp_NULL,
      (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
#else
   write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
      png_error_ptr_NULL, png_error_ptr_NULL);
#endif
#if defined(PNG_NO_STDIO)
   png_set_error_fn(write_ptr, (png_voidp)inname, pngtest_error,
       pngtest_warning);
#endif
#endif
   png_debug(0, "Allocating read_info, write_info and end_info structures\n");
   read_info_ptr = png_create_info_struct(read_ptr);
   end_info_ptr = png_create_info_struct(read_ptr);
#ifdef PNG_WRITE_SUPPORTED
   write_info_ptr = png_create_info_struct(write_ptr);
   write_end_info_ptr = png_create_info_struct(write_ptr);
#endif

#ifdef PNG_SETJMP_SUPPORTED
   png_debug(0, "Setting jmpbuf for read struct\n");
#ifdef USE_FAR_KEYWORD
   if (setjmp(jmpbuf))
#else
   if (setjmp(png_jmpbuf(read_ptr)))
#endif
   {
      fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
      if (row_buf)
         png_free(read_ptr, row_buf);
      png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
#ifdef PNG_WRITE_SUPPORTED
      png_destroy_info_struct(write_ptr, &write_end_info_ptr);
      png_destroy_write_struct(&write_ptr, &write_info_ptr);
#endif
      FCLOSE(fpin);
      FCLOSE(fpout);
      return (1);
   }
#ifdef USE_FAR_KEYWORD
   png_memcpy(png_jmpbuf(read_ptr),jmpbuf,sizeof(jmp_buf));
#endif

#ifdef PNG_WRITE_SUPPORTED
   png_debug(0, "Setting jmpbuf for write struct\n");
#ifdef USE_FAR_KEYWORD
   if (setjmp(jmpbuf))
#else
   if (setjmp(png_jmpbuf(write_ptr)))
#endif
   {
      fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
      png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
      png_destroy_info_struct(write_ptr, &write_end_info_ptr);
#ifdef PNG_WRITE_SUPPORTED
      png_destroy_write_struct(&write_ptr, &write_info_ptr);
#endif
      FCLOSE(fpin);
      FCLOSE(fpout);
      return (1);
   }
#ifdef USE_FAR_KEYWORD
   png_memcpy(png_jmpbuf(write_ptr),jmpbuf,sizeof(jmp_buf));
#endif
#endif
#endif

   png_debug(0, "Initializing input and output streams\n");
#if !defined(PNG_NO_STDIO)
   png_init_io(read_ptr, fpin);
#  ifdef PNG_WRITE_SUPPORTED
   png_init_io(write_ptr, fpout);
#  endif
#else
   png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
#  ifdef PNG_WRITE_SUPPORTED
   png_set_write_fn(write_ptr, (png_voidp)fpout,  pngtest_write_data,
#    if defined(PNG_WRITE_FLUSH_SUPPORTED)
      pngtest_flush);
#    else
      NULL);
#    endif
#  endif
#endif
   if(status_dots_requested == 1)
   {
#ifdef PNG_WRITE_SUPPORTED
      png_set_write_status_fn(write_ptr, write_row_callback);
#endif
      png_set_read_status_fn(read_ptr, read_row_callback);
   }
   else
   {
#ifdef PNG_WRITE_SUPPORTED
      png_set_write_status_fn(write_ptr, png_write_status_ptr_NULL);
#endif
      png_set_read_status_fn(read_ptr, png_read_status_ptr_NULL);
   }

#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
   {
     int i;
     for(i=0; i<256; i++)
        filters_used[i]=0;
     png_set_read_user_transform_fn(read_ptr, count_filters);
   }
#endif
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
   zero_samples=0;
   png_set_write_user_transform_fn(write_ptr, count_zero_samples);
#endif

#define HANDLE_CHUNK_IF_SAFE      2
#define HANDLE_CHUNK_ALWAYS       3
#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
   png_set_keep_unknown_chunks(read_ptr, HANDLE_CHUNK_ALWAYS,
      png_bytep_NULL, 0);
#endif
#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
   png_set_keep_unknown_chunks(write_ptr, HANDLE_CHUNK_IF_SAFE,
      png_bytep_NULL, 0);
#endif

   png_debug(0, "Reading info struct\n");
   png_read_info(read_ptr, read_info_ptr);

   png_debug(0, "Transferring info struct\n");
   {
      int interlace_type, compression_type, filter_type;

      if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth,
          &color_type, &interlace_type, &compression_type, &filter_type))
      {
         png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
            color_type, interlace_type, compression_type, filter_type);
#else
            color_type, PNG_INTERLACE_NONE, compression_type, filter_type);
#endif
      }
   }
#if defined(PNG_FIXED_POINT_SUPPORTED)
#if defined(PNG_cHRM_SUPPORTED)
   {
      png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
         blue_y;
      if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
         &red_y, &green_x, &green_y, &blue_x, &blue_y))
      {
         png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x,
            red_y, green_x, green_y, blue_x, blue_y);
      }
   }
#endif
#if defined(PNG_gAMA_SUPPORTED)
   {
      png_fixed_point gamma;

      if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma))
      {
         png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma);
      }
   }
#endif
#else /* Use floating point versions */
#if defined(PNG_FLOATING_POINT_SUPPORTED)
#if defined(PNG_cHRM_SUPPORTED)
   {
      double white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
         blue_y;
      if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
         &red_y, &green_x, &green_y, &blue_x, &blue_y))
      {
         png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x,
            red_y, green_x, green_y, blue_x, blue_y);
      }
   }
#endif
#if defined(PNG_gAMA_SUPPORTED)
   {
      double gamma;

      if (png_get_gAMA(read_ptr, read_info_ptr, &gamma))
      {
         png_set_gAMA(write_ptr, write_info_ptr, gamma);
      }
   }
#endif
#endif /* floating point */
#endif /* fixed point */
#if defined(PNG_iCCP_SUPPORTED)
   {
      png_charp name;
      png_charp profile;
      png_uint_32 proflen;
      int compression_type;

      if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type,
                      &profile, &proflen))
      {
         png_set_iCCP(write_ptr, write_info_ptr, name, compression_type,
                      profile, proflen);
      }
   }
#endif
#if defined(PNG_sRGB_SUPPORTED)
   {
      int intent;

      if (png_get_sRGB(read_ptr, read_info_ptr, &intent))
      {
         png_set_sRGB(write_ptr, write_info_ptr, intent);
      }
   }
#endif
   {
      png_colorp palette;
      int num_palette;

      if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette))
      {
         png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
      }
   }
#if defined(PNG_bKGD_SUPPORTED)
   {
      png_color_16p background;

      if (png_get_bKGD(read_ptr, read_info_ptr, &background))
      {
         png_set_bKGD(write_ptr, write_info_ptr, background);
      }
   }
#endif
#if defined(PNG_hIST_SUPPORTED)
   {
      png_uint_16p hist;

      if (png_get_hIST(read_ptr, read_info_ptr, &hist))
      {
         png_set_hIST(write_ptr, write_info_ptr, hist);
      }
   }
#endif
#if defined(PNG_oFFs_SUPPORTED)
   {
      png_int_32 offset_x, offset_y;
      int unit_type;

      if (png_get_oFFs(read_ptr, read_info_ptr,&offset_x,&offset_y,&unit_type))
      {
         png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
      }
   }
#endif
#if defined(PNG_pCAL_SUPPORTED)
   {
      png_charp purpose, units;
      png_charpp params;
      png_int_32 X0, X1;
      int type, nparams;

      if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type,
         &nparams, &units, &params))
      {
         png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type,
            nparams, units, params);
      }
   }
#endif
#if defined(PNG_pHYs_SUPPORTED)
   {
      png_uint_32 res_x, res_y;
      int unit_type;

      if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, &unit_type))
      {
         png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);
      }
   }
#endif
#if defined(PNG_sBIT_SUPPORTED)
   {
      png_color_8p sig_bit;

      if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit))
      {
         png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
      }
   }
#endif
#if defined(PNG_sCAL_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
   {
      int unit;
      double scal_width, scal_height;

      if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width,
         &scal_height))
      {
         png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height);
      }
   }
#else
#ifdef PNG_FIXED_POINT_SUPPORTED
   {
      int unit;
      png_charp scal_width, scal_height;

      if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width,
          &scal_height))
      {
         png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width, scal_height);
      }
   }
#endif
#endif
#endif
#if defined(PNG_TEXT_SUPPORTED)
   {
      png_textp text_ptr;
      int num_text;

      if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
      {
         png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks\n", num_text);
         png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
      }
   }
#endif
#if defined(PNG_tIME_SUPPORTED)
   {
      png_timep mod_time;

      if (png_get_tIME(read_ptr, read_info_ptr, &mod_time))
      {
         png_set_tIME(write_ptr, write_info_ptr, mod_time);
#if defined(PNG_TIME_RFC1123_SUPPORTED)
         /* we have to use png_strcpy instead of "=" because the string
            pointed to by png_convert_to_rfc1123() gets free'ed before
            we use it */
         png_strcpy(tIME_string,png_convert_to_rfc1123(read_ptr, mod_time));
         tIME_chunk_present++;
#endif /* PNG_TIME_RFC1123_SUPPORTED */
      }
   }
#endif
#if defined(PNG_tRNS_SUPPORTED)
   {
      png_bytep trans;
      int num_trans;
      png_color_16p trans_values;

      if (png_get_tRNS(read_ptr, read_info_ptr, &trans, &num_trans,
         &trans_values))
      {
         png_set_tRNS(write_ptr, write_info_ptr, trans, num_trans,
            trans_values);
      }
   }
#endif
#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
   {
      png_unknown_chunkp unknowns;
      int num_unknowns = (int)png_get_unknown_chunks(read_ptr, read_info_ptr,
         &unknowns);
      if (num_unknowns)
      {
         png_size_t i;
         png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns,
           num_unknowns);
         /* copy the locations from the read_info_ptr.  The automatically
            generated locations in write_info_ptr are wrong because we
            haven't written anything yet */
         for (i = 0; i < (png_size_t)num_unknowns; i++)
           png_set_unknown_chunk_location(write_ptr, write_info_ptr, i,
             unknowns[i].location);
      }
   }
#endif

#ifdef PNG_WRITE_SUPPORTED
   png_debug(0, "\nWriting info struct\n");

/* If we wanted, we could write info in two steps:
   png_write_info_before_PLTE(write_ptr, write_info_ptr);
 */
   png_write_info(write_ptr, write_info_ptr);
#endif

#ifdef SINGLE_ROWBUF_ALLOC
   png_debug(0, "\nAllocating row buffer...");
   row_buf = (png_bytep)png_malloc(read_ptr,
      png_get_rowbytes(read_ptr, read_info_ptr));
   png_debug1(0, "0x%08lx\n\n", (unsigned long)row_buf);
#endif /* SINGLE_ROWBUF_ALLOC */
   png_debug(0, "Writing row data\n");

#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
  defined(PNG_WRITE_INTERLACING_SUPPORTED)
   num_pass = png_set_interlace_handling(read_ptr);
#  ifdef PNG_WRITE_SUPPORTED
   png_set_interlace_handling(write_ptr);
#  endif
#else
   num_pass=1;
#endif

#ifdef PNGTEST_TIMING
   t_stop = (float)clock();
   t_misc += (t_stop - t_start);
   t_start = t_stop;
#endif
   for (pass = 0; pass < num_pass; pass++)
   {
      png_debug1(0, "Writing row data for pass %d\n",pass);
      for (y = 0; y < height; y++)
      {
#ifndef SINGLE_ROWBUF_ALLOC
         png_debug2(0, "\nAllocating row buffer (pass %d, y = %ld)...", pass,y);
         row_buf = (png_bytep)png_malloc(read_ptr,
            png_get_rowbytes(read_ptr, read_info_ptr));
         png_debug2(0, "0x%08lx (%ld bytes)\n", (unsigned long)row_buf,
            png_get_rowbytes(read_ptr, read_info_ptr));
#endif /* !SINGLE_ROWBUF_ALLOC */
         png_read_rows(read_ptr, (png_bytepp)&row_buf, png_bytepp_NULL, 1);

#ifdef PNG_WRITE_SUPPORTED
#ifdef PNGTEST_TIMING
         t_stop = (float)clock();
         t_decode += (t_stop - t_start);
         t_start = t_stop;
#endif
         png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
#ifdef PNGTEST_TIMING
         t_stop = (float)clock();
         t_encode += (t_stop - t_start);
         t_start = t_stop;
#endif
#endif /* PNG_WRITE_SUPPORTED */

#ifndef SINGLE_ROWBUF_ALLOC
         png_debug2(0, "Freeing row buffer (pass %d, y = %ld)\n\n", pass, y);
         png_free(read_ptr, row_buf);
#endif /* !SINGLE_ROWBUF_ALLOC */
      }
   }

#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
   png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
#endif
#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
   png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
#endif

   png_debug(0, "Reading and writing end_info data\n");

   png_read_end(read_ptr, end_info_ptr);
#if defined(PNG_TEXT_SUPPORTED)
   {
      png_textp text_ptr;
      int num_text;

      if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
      {
         png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks\n", num_text);
         png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
      }
   }
#endif
#if defined(PNG_tIME_SUPPORTED)
   {
      png_timep mod_time;

      if (png_get_tIME(read_ptr, end_info_ptr, &mod_time))
      {
         png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
#if defined(PNG_TIME_RFC1123_SUPPORTED)
         /* we have to use png_strcpy instead of "=" because the string
            pointed to by png_convert_to_rfc1123() gets free'ed before
            we use it */
         png_strcpy(tIME_string,png_convert_to_rfc1123(read_ptr, mod_time));
         tIME_chunk_present++;
#endif /* PNG_TIME_RFC1123_SUPPORTED */
      }
   }
#endif
#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
   {
      png_unknown_chunkp unknowns;
      int num_unknowns;
      num_unknowns = (int)png_get_unknown_chunks(read_ptr, end_info_ptr,
         &unknowns);
      if (num_unknowns)
      {
         png_size_t i;
         png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
           num_unknowns);
         /* copy the locations from the read_info_ptr.  The automatically
            generated locations in write_end_info_ptr are wrong because we
            haven't written the end_info yet */
         for (i = 0; i < (png_size_t)num_unknowns; i++)
           png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
             unknowns[i].location);
      }
   }
#endif
#ifdef PNG_WRITE_SUPPORTED
   png_write_end(write_ptr, write_end_info_ptr);
#endif

#ifdef PNG_EASY_ACCESS_SUPPORTED
   if(verbose)
   {
      png_uint_32 iwidth, iheight;
      iwidth = png_get_image_width(write_ptr, write_info_ptr);
      iheight = png_get_image_height(write_ptr, write_info_ptr);
      fprintf(STDERR, "Image width = %lu, height = %lu\n",
         iwidth, iheight);
   }
#endif

   png_debug(0, "Destroying data structs\n");
#ifdef SINGLE_ROWBUF_ALLOC
   png_debug(1, "destroying row_buf for read_ptr\n");
   png_free(read_ptr, row_buf);
   row_buf=NULL;
#endif /* SINGLE_ROWBUF_ALLOC */
   png_debug(1, "destroying read_ptr, read_info_ptr, end_info_ptr\n");
   png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
#ifdef PNG_WRITE_SUPPORTED
   png_debug(1, "destroying write_end_info_ptr\n");
   png_destroy_info_struct(write_ptr, &write_end_info_ptr);
   png_debug(1, "destroying write_ptr, write_info_ptr\n");
   png_destroy_write_struct(&write_ptr, &write_info_ptr);
#endif
   png_debug(0, "Destruction complete.\n");

   FCLOSE(fpin);
   FCLOSE(fpout);

   png_debug(0, "Opening files for comparison\n");
#if defined(_WIN32_WCE)
   MultiByteToWideChar(CP_ACP, 0, inname, -1, path, MAX_PATH);
   if ((fpin = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE)
#else
   if ((fpin = fopen(inname, "rb")) == NULL)
#endif
   {
      fprintf(STDERR, "Could not find file %s\n", inname);
      return (1);
   }

#if defined(_WIN32_WCE)
   MultiByteToWideChar(CP_ACP, 0, outname, -1, path, MAX_PATH);
   if ((fpout = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE)
#else
   if ((fpout = fopen(outname, "rb")) == NULL)
#endif
   {
      fprintf(STDERR, "Could not find file %s\n", outname);
      FCLOSE(fpin);
      return (1);
   }

   for(;;)
   {
      png_size_t num_in, num_out;

      READFILE(fpin, inbuf, 1, num_in);
      READFILE(fpout, outbuf, 1, num_out);

      if (num_in != num_out)
      {
         fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
                 inname, outname);
         if(wrote_question == 0)
         {
            fprintf(STDERR,
         "   Was %s written with the same maximum IDAT chunk size (%d bytes),",
              inname,PNG_ZBUF_SIZE);
            fprintf(STDERR,
              "\n   filtering heuristic (libpng default), compression");
            fprintf(STDERR,
              " level (zlib default),\n   and zlib version (%s)?\n\n",
              ZLIB_VERSION);
            wrote_question=1;
         }
         FCLOSE(fpin);
         FCLOSE(fpout);
         return (0);
      }

      if (!num_in)
         break;

      if (png_memcmp(inbuf, outbuf, num_in))
      {
         fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname);
         if(wrote_question == 0)
         {
            fprintf(STDERR,
         "   Was %s written with the same maximum IDAT chunk size (%d bytes),",
                 inname,PNG_ZBUF_SIZE);
            fprintf(STDERR,
              "\n   filtering heuristic (libpng default), compression");
            fprintf(STDERR,
              " level (zlib default),\n   and zlib version (%s)?\n\n",
              ZLIB_VERSION);
            wrote_question=1;
         }
         FCLOSE(fpin);
         FCLOSE(fpout);
         return (0);
      }
   }

   FCLOSE(fpin);
   FCLOSE(fpout);

   return (0);
}

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void write_row_callback ( png_structp  png_ptr,
png_uint_32  row_number,
int  pass 
)

Definition at line 155 of file pngtest.c.

{
    if(png_ptr == NULL || row_number > PNG_MAX_UINT || pass > 7) return;
    fprintf(stdout, "w");
}

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Variable Documentation

int current_allocation = 0 [static]

Definition at line 492 of file pngtest.c.

png_uint_32 filters_used[256] [static]

Definition at line 166 of file pngtest.c.

PNG_CONST char* inname = "pngtest.png" [static]

Definition at line 1290 of file pngtest.c.

int maximum_allocation = 0 [static]

Definition at line 493 of file pngtest.c.

int num_allocations = 0 [static]

Definition at line 495 of file pngtest.c.

PNG_CONST char* outname = "pngout.png" [static]

Definition at line 1291 of file pngtest.c.

Definition at line 491 of file pngtest.c.

int status_dots = 1 [static]

Definition at line 117 of file pngtest.c.

int status_dots_requested = 0 [static]

Definition at line 116 of file pngtest.c.

int status_pass = 1 [static]

Definition at line 115 of file pngtest.c.

int tIME_chunk_present = 0 [static]

Definition at line 98 of file pngtest.c.

char tIME_string[30] = "no tIME chunk present in file" [static]

Definition at line 99 of file pngtest.c.

int total_allocation = 0 [static]

Definition at line 494 of file pngtest.c.

int verbose = 0 [static]

Definition at line 102 of file pngtest.c.

int wrote_question = 0 [static]

Definition at line 286 of file pngtest.c.

Definition at line 187 of file pngtest.c.