C++ png_destroy_struct函数代码示例

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本文整理汇总了C++中png_destroy_struct函数的典型用法代码示例。如果您正苦于以下问题：C++ png_destroy_struct函数的具体用法？C++ png_destroy_struct怎么用？C++ png_destroy_struct使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了png_destroy_struct函数的12个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: png_info_init_3

void PNGAPI
png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
{
   png_infop info_ptr = *ptr_ptr;

   png_debug(1, "in png_info_init_3");

   if (info_ptr == NULL)
      return;

   if (png_sizeof(png_info) > png_info_struct_size)
   {
      png_destroy_struct(info_ptr);
      info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
      *ptr_ptr = info_ptr;
      if (info_ptr == NULL)
         return;
   }

   /* Set everything to 0 */
   png_memset(info_ptr, 0, png_sizeof(png_info));
}

开发者ID:A2-Collaboration，项目名称:root，代码行数:22，代码来源:png.c

示例2: png_destroy_info_struct

/* This function frees the memory associated with a single info struct.
 * Normally, one would use either png_destroy_read_struct() or
 * png_destroy_write_struct() to free an info struct, but this may be
 * useful for some applications.
 */
void PNGAPI
png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
{
   png_infop info_ptr = NULL;

   png_debug(1, "in png_destroy_info_struct\n");
   if (info_ptr_ptr != NULL)
      info_ptr = *info_ptr_ptr;

   if (info_ptr != NULL)
   {
      png_info_destroy(png_ptr, info_ptr);

#ifdef PNG_USER_MEM_SUPPORTED
      png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn,
          png_ptr->mem_ptr);
#else
      png_destroy_struct((png_voidp)info_ptr);
#endif
      *info_ptr_ptr = NULL;
   }
}

开发者ID:foreverlikeyou9999，项目名称:kos-ports，代码行数:27，代码来源:png.c

示例3: png_destroy_read_struct

/* Free all memory used by the read */
void PNGAPI
png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
   png_infopp end_info_ptr_ptr)
{
   png_structp png_ptr = NULL;
   png_infop info_ptr = NULL, end_info_ptr = NULL;
#ifdef PNG_USER_MEM_SUPPORTED
   png_free_ptr free_fn = NULL;
   png_voidp mem_ptr = NULL;
#endif

   png_debug(1, "in png_destroy_read_struct");

   if (png_ptr_ptr != NULL)
      png_ptr = *png_ptr_ptr;
   if (png_ptr == NULL)
      return;

#ifdef PNG_USER_MEM_SUPPORTED
   free_fn = png_ptr->free_fn;
   mem_ptr = png_ptr->mem_ptr;
#endif

   if (info_ptr_ptr != NULL)
      info_ptr = *info_ptr_ptr;

   if (end_info_ptr_ptr != NULL)
      end_info_ptr = *end_info_ptr_ptr;

   png_read_destroy(png_ptr, info_ptr, end_info_ptr);

   if (info_ptr != NULL)
   {
#ifdef PNG_TEXT_SUPPORTED
      png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1);
#endif

#ifdef PNG_USER_MEM_SUPPORTED
      png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
          (png_voidp)mem_ptr);
#else
      png_destroy_struct((png_voidp)info_ptr);
#endif
      *info_ptr_ptr = NULL;
   }

   if (end_info_ptr != NULL)
   {
#ifdef PNG_READ_TEXT_SUPPORTED
      png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1);
#endif
#ifdef PNG_USER_MEM_SUPPORTED
      png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn,
         (png_voidp)mem_ptr);
#else
      png_destroy_struct((png_voidp)end_info_ptr);
#endif
      *end_info_ptr_ptr = NULL;
   }

   if (png_ptr != NULL)
   {
#ifdef PNG_USER_MEM_SUPPORTED
      png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
          (png_voidp)mem_ptr);
#else
      png_destroy_struct((png_voidp)png_ptr);
#endif
      *png_ptr_ptr = NULL;
   }
}

开发者ID:136446529，项目名称:Tiny-Wings-Remake-on-Android，代码行数:72，代码来源:pngread.c

示例4: png_create_read_struct_2


//.........这里部分代码省略.........
   png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);

   if (user_png_ver)
   {
      i = 0;
      do
      {
         if (user_png_ver[i] != png_libpng_ver[i])
            png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
      } while (png_libpng_ver[i++]);
    }
    else
         png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;


    if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
    {
       /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
       * we must recompile any applications that use any older library version.
       * For versions after libpng 1.0, we will be compatible, so we need
       * only check the first digit.
       */
      if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
          (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
          (user_png_ver[0] == '0' && user_png_ver[2] < '9'))
      {
#ifdef PNG_STDIO_SUPPORTED
         char msg[80];
         if (user_png_ver)
         {
           png_snprintf(msg, 80,
              "Application was compiled with png.h from libpng-%.20s",
              user_png_ver);
           png_warning(png_ptr, msg);
         }
         png_snprintf(msg, 80,
             "Application  is  running with png.c from libpng-%.20s",
             png_libpng_ver);
         png_warning(png_ptr, msg);
#endif
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
         png_ptr->flags = 0;
#endif
         png_warning(png_ptr,
            "Incompatible libpng version in application and library");

         png_cleanup_needed = 1;
      }
   }

   if (!png_cleanup_needed)
   {
   /* Initialize zbuf - compression buffer */
   png_ptr->zbuf_size = PNG_ZBUF_SIZE;
   png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr,
     png_ptr->zbuf_size);
   if (png_ptr->zbuf == NULL)
        png_cleanup_needed = 1;
   }
   png_ptr->zstream.zalloc = png_zalloc;
   png_ptr->zstream.zfree = png_zfree;
   png_ptr->zstream.opaque = (voidpf)png_ptr;

   if (!png_cleanup_needed)
   {
      switch (inflateInit(&png_ptr->zstream))
      {
         case Z_OK: /* Do nothing */ break;
         case Z_MEM_ERROR:
         case Z_STREAM_ERROR: png_warning(png_ptr, "zlib memory error");
            png_cleanup_needed = 1; break;
         case Z_VERSION_ERROR: png_warning(png_ptr, "zlib version error");
            png_cleanup_needed = 1; break;
         default: png_warning(png_ptr, "Unknown zlib error");
            png_cleanup_needed = 1;
      }
   }

   if (png_cleanup_needed)
   {
      /* Clean up PNG structure and deallocate any memory. */
      png_free(png_ptr, png_ptr->zbuf);
      png_ptr->zbuf = NULL;
#ifdef PNG_USER_MEM_SUPPORTED
      png_destroy_struct_2((png_voidp)png_ptr,
         (png_free_ptr)free_fn, (png_voidp)mem_ptr);
#else
      png_destroy_struct((png_voidp)png_ptr);
#endif
      return (NULL);
   }

   png_ptr->zstream.next_out = png_ptr->zbuf;
   png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;

   png_set_read_fn(png_ptr, NULL, NULL);


   return (png_ptr);
}

开发者ID:136446529，项目名称:Tiny-Wings-Remake-on-Android，代码行数:101，代码来源:pngread.c

示例5: png_read_init_3

void PNGAPI
png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
   png_size_t png_struct_size)
{
#ifdef PNG_SETJMP_SUPPORTED
   jmp_buf tmp_jmp;  /* to save current jump buffer */
#endif

   int i=0;

   png_structp png_ptr=*ptr_ptr;

   if(png_ptr == NULL) return;

   do
   {
     if(user_png_ver[i] != png_libpng_ver[i])
     {
#ifdef PNG_LEGACY_SUPPORTED
       png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
#else
       png_ptr->warning_fn=NULL;
       png_warning(png_ptr,
        "Application uses deprecated png_read_init() and should be recompiled.");
       break;
#endif
     }
   } while (png_libpng_ver[i++]);

   png_debug(1, "in png_read_init_3\n");

#ifdef PNG_SETJMP_SUPPORTED
   /* save jump buffer and error functions */
   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof (jmp_buf));
#endif

   if(png_sizeof(png_struct) > png_struct_size)
     {
       png_destroy_struct(png_ptr);
       *ptr_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
       png_ptr = *ptr_ptr;
     }

   /* reset all variables to 0 */
   png_memset(png_ptr, 0, png_sizeof (png_struct));

#ifdef PNG_SETJMP_SUPPORTED
   /* restore jump buffer */
   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf));
#endif

   /* added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
   png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
   png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
#endif

   /* initialize zbuf - compression buffer */
   png_ptr->zbuf_size = PNG_ZBUF_SIZE;
   png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
     (png_uint_32)png_ptr->zbuf_size);
   png_ptr->zstream.zalloc = png_zalloc;
   png_ptr->zstream.zfree = png_zfree;
   png_ptr->zstream.opaque = (voidpf)png_ptr;

   switch (inflateInit(&png_ptr->zstream))
   {
     case Z_OK: /* Do nothing */ break;
     case Z_MEM_ERROR:
     case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory"); break;
     case Z_VERSION_ERROR: png_error(png_ptr, "zlib version"); break;
     default: png_error(png_ptr, "Unknown zlib error");
   }

   png_ptr->zstream.next_out = png_ptr->zbuf;
   png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;

   png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL);
}

开发者ID:My-Source，项目名称:root，代码行数:79，代码来源:pngread.c

示例6: png_create_read_struct_2

/* Alternate create PNG structure for reading, and allocate any memory needed. */
png_structp PNGAPI
png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
   png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
   png_malloc_ptr malloc_fn, png_free_ptr free_fn)
{
#endif /* PNG_USER_MEM_SUPPORTED */

   png_structp png_ptr;

#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
   jmp_buf jmpbuf;
#endif
#endif

   int i;

   png_debug(1, "in png_create_read_struct\n");
#ifdef PNG_USER_MEM_SUPPORTED
   png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
      (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
#else
   png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
#endif
   if (png_ptr == NULL)
      return (NULL);

#if !defined(PNG_1_0_X)
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
   png_init_mmx_flags(png_ptr);   /* 1.2.0 addition */
#endif
#endif /* PNG_1_0_X */

   /* added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
   png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
   png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
#endif

#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
   if (setjmp(jmpbuf))
#else
   if (setjmp(png_ptr->jmpbuf))
#endif
   {
      png_free(png_ptr, png_ptr->zbuf);
      png_ptr->zbuf=NULL;
#ifdef PNG_USER_MEM_SUPPORTED
      png_destroy_struct_2((png_voidp)png_ptr,
         (png_free_ptr)free_fn, (png_voidp)mem_ptr);
#else
      png_destroy_struct((png_voidp)png_ptr);
#endif
      return (NULL);
   }
#ifdef USE_FAR_KEYWORD
   png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf));
#endif
#endif

#ifdef PNG_USER_MEM_SUPPORTED
   png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
#endif

   png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);

   i=0;
   do
   {
     if(user_png_ver[i] != png_libpng_ver[i])
        png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
   } while (png_libpng_ver[i++]);

   if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
   {
     /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
      * we must recompile any applications that use any older library version.
      * For versions after libpng 1.0, we will be compatible, so we need
      * only check the first digit.
      */
     if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
         (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
         (user_png_ver[0] == '0' && user_png_ver[2] < '9'))
     {
#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
        char msg[80];
        if (user_png_ver)
        {
          sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
             user_png_ver);
          png_warning(png_ptr, msg);
        }
        sprintf(msg, "Application  is  running with png.c from libpng-%.20s",
           png_libpng_ver);
        png_warning(png_ptr, msg);
#endif
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
        png_ptr->flags=0;
//.........这里部分代码省略.........

开发者ID:Brukwa，项目名称:VisualBoyAdvance，代码行数:101，代码来源:pngread.c

示例7: png_create_write_struct_2

/* Alternate initialize png_ptr structure, and allocate any memory needed */
png_structp
png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
   png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
   png_malloc_ptr malloc_fn, png_free_ptr free_fn)
{
#endif /* PNG_USER_MEM_SUPPORTED */
   png_structp png_ptr;
#ifdef USE_FAR_KEYWORD
   jmp_buf jmpbuf;
#endif
   png_debug(1, "in png_create_write_struct\n");
#ifdef PNG_USER_MEM_SUPPORTED
   if ((png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
      (png_malloc_ptr)malloc_fn)) == NULL)
#else
   if ((png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG)) == NULL)
#endif /* PNG_USER_MEM_SUPPORTED */
   {
      return ((png_structp)NULL);
   }
#ifdef USE_FAR_KEYWORD
   if (setjmp(jmpbuf))
#else
   if (setjmp(png_ptr->jmpbuf))
#endif
   {
      png_free(png_ptr, png_ptr->zbuf);
      png_destroy_struct(png_ptr);
      return ((png_structp)NULL);
   }
#ifdef USE_FAR_KEYWORD
   png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
#endif
#ifdef PNG_USER_MEM_SUPPORTED
   png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
#endif /* PNG_USER_MEM_SUPPORTED */
   png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);

   /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
    * we must recompile any applications that use any older library version.
    * For versions after libpng 1.0, we will be compatible, so we need
    * only check the first digit.
    */
   if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
       (png_libpng_ver[0] == '0' && user_png_ver[2] < '9'))
   {
      png_error(png_ptr,
         "Incompatible libpng version in application and library");
   }

   /* initialize zbuf - compression buffer */
   png_ptr->zbuf_size = PNG_ZBUF_SIZE;
   png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
      (png_uint_32)png_ptr->zbuf_size);

   png_set_write_fn(png_ptr, NULL, NULL, NULL);

#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
   png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
      1, NULL, NULL);
#endif

   return ((png_structp)png_ptr);
}

开发者ID:RaisingTheDerp，项目名称:raisingthebar，代码行数:65，代码来源:pngwrite.c

示例8: png_destroy_read_struct

/* free all memory used by the read */
void
png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
   png_infopp end_info_ptr_ptr)
{
   png_structp png_ptr = NULL;
   png_infop info_ptr = NULL, end_info_ptr = NULL;
#ifdef PNG_USER_MEM_SUPPORTED
   png_free_ptr free_fn = NULL;
#endif /* PNG_USER_MEM_SUPPORTED */

   png_debug(1, "in png_destroy_read_struct\n");
   /* save jump buffer and error functions */
   if (png_ptr_ptr != NULL)
      png_ptr = *png_ptr_ptr;

   if (info_ptr_ptr != NULL)
      info_ptr = *info_ptr_ptr;

   if (end_info_ptr_ptr != NULL)
      end_info_ptr = *end_info_ptr_ptr;

#ifdef PNG_USER_MEM_SUPPORTED
   free_fn = png_ptr->free_fn;
#endif

   png_read_destroy(png_ptr, info_ptr, end_info_ptr);

   if (info_ptr != NULL)
   {
#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED)
      png_free(png_ptr, info_ptr->text);
#endif

#ifdef PNG_USER_MEM_SUPPORTED
      png_destroy_struct_2((png_voidp)info_ptr, free_fn);
#else
      png_destroy_struct((png_voidp)info_ptr);
#endif
      *info_ptr_ptr = (png_infop)NULL;
   }

   if (end_info_ptr != NULL)
   {
#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED)
      png_free(png_ptr, end_info_ptr->text);
#endif
#ifdef PNG_USER_MEM_SUPPORTED
      png_destroy_struct_2((png_voidp)end_info_ptr, free_fn);
#else
      png_destroy_struct((png_voidp)end_info_ptr);
#endif
      *end_info_ptr_ptr = (png_infop)NULL;
   }

   if (png_ptr != NULL)
   {
#ifdef PNG_USER_MEM_SUPPORTED
      png_destroy_struct_2((png_voidp)png_ptr, free_fn);
#else
      png_destroy_struct((png_voidp)png_ptr);
#endif
      *png_ptr_ptr = (png_structp)NULL;
   }
}

开发者ID:RaymondLiao，项目名称:elektronika，代码行数:65，代码来源:pngread.c

示例9: png_create_read_struct_2

/* Alternate create PNG structure for reading, and allocate any memory needed. */
png_structp
png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
   png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
   png_malloc_ptr malloc_fn, png_free_ptr free_fn)
{
#endif /* PNG_USER_MEM_SUPPORTED */

   png_structp png_ptr;
#ifdef USE_FAR_KEYWORD
   jmp_buf jmpbuf;
#endif
   png_debug(1, "in png_create_read_struct\n");
#ifdef PNG_USER_MEM_SUPPORTED
   if ((png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
      (png_malloc_ptr)malloc_fn)) == NULL)
#else
   if ((png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG)) == NULL)
#endif
   {
      return (png_structp)NULL;
   }
#ifdef USE_FAR_KEYWORD
   if (setjmp(jmpbuf))
#else
   if (setjmp(png_ptr->jmpbuf))
#endif
   {
      png_free(png_ptr, png_ptr->zbuf);
      png_destroy_struct(png_ptr);
      return (png_structp)NULL;
   }
#ifdef USE_FAR_KEYWORD
   png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
#endif

#ifdef PNG_USER_MEM_SUPPORTED
   png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
#endif /* PNG_USER_MEM_SUPPORTED */

   png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);

   /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
    * we must recompile any applications that use any older library version.
    * For versions after libpng 1.0, we will be compatible, so we need
    * only check the first digit.
    */
   if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
       (user_png_ver[0] == '0' && user_png_ver[2] < '9'))
   {
      png_error(png_ptr,
         "Incompatible libpng version in application and library");
   }

   /* initialize zbuf - compression buffer */
   png_ptr->zbuf_size = PNG_ZBUF_SIZE;
   png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
     (png_uint_32)png_ptr->zbuf_size);
   png_ptr->zstream.zalloc = png_zalloc;
   png_ptr->zstream.zfree = png_zfree;
   png_ptr->zstream.opaque = (voidpf)png_ptr;

   switch (inflateInit(&png_ptr->zstream))
   {
     case Z_OK: /* Do nothing */ break;
     case Z_MEM_ERROR:
     case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory error"); break;
     case Z_VERSION_ERROR: png_error(png_ptr, "zlib version error"); break;
     default: png_error(png_ptr, "Unknown zlib error");
   }

   png_ptr->zstream.next_out = png_ptr->zbuf;
   png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;

   png_set_read_fn(png_ptr, NULL, NULL);

   return (png_ptr);
}

开发者ID:RaymondLiao，项目名称:elektronika，代码行数:78，代码来源:pngread.c

示例10: png_create_read_struct_2

png_structp PNGAPI
png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
                         png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
                         png_malloc_ptr malloc_fn, png_free_ptr free_fn)
{
#endif

    png_structp png_ptr;

#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
    jmp_buf jmpbuf;
#endif
#endif

    int i;

    png_debug(1, "in png_create_read_struct\n");
#ifdef PNG_USER_MEM_SUPPORTED
    png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
              (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
#else
    png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
#endif
    if (png_ptr == NULL)
        return (NULL);

#if !defined(PNG_1_0_X)
#ifdef PNG_MMX_CODE_SUPPORTED
    png_init_mmx_flags(png_ptr);
#endif
#endif


#ifdef PNG_SET_USER_LIMITS_SUPPORTED
    png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
    png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
#endif

#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
    if (setjmp(jmpbuf))
#else
    if (setjmp(png_ptr->jmpbuf))
#endif
    {
        png_free(png_ptr, png_ptr->zbuf);
        png_ptr->zbuf=NULL;
#ifdef PNG_USER_MEM_SUPPORTED
        png_destroy_struct_2((png_voidp)png_ptr,
                             (png_free_ptr)free_fn, (png_voidp)mem_ptr);
#else
        png_destroy_struct((png_voidp)png_ptr);
#endif
        return (NULL);
    }
#ifdef USE_FAR_KEYWORD
    png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf));
#endif
#endif

#ifdef PNG_USER_MEM_SUPPORTED
    png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
#endif

    png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);

    i=0;
    do
    {
        if(user_png_ver[i] != png_libpng_ver[i])
            png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
    } while (png_libpng_ver[i++]);

    if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
    {
        if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
                (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
                (user_png_ver[0] == '0' && user_png_ver[2] < '9'))
        {
#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
            char msg[80];
            if (user_png_ver)
            {
                png_snprintf(msg, 80,
                             "Application was compiled with png.h from libpng-%.20s",
                             user_png_ver);
                png_warning(png_ptr, msg);
            }
            png_snprintf(msg, 80,
                         "Application  is  running with png.c from libpng-%.20s",
                         png_libpng_ver);
            png_warning(png_ptr, msg);
#endif
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
            png_ptr->flags=0;
#endif
            png_error(png_ptr,
                      "Incompatible libpng version in application and library");
        }
//.........这里部分代码省略.........

开发者ID:qtekfun，项目名称:htcDesire820Kernel，代码行数:101，代码来源:pngread.c

示例11: png_create_read_struct_2

/* Alternate create PNG structure for reading, and allocate any memory needed. */
png_structp PNGAPI
png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
   png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
   png_malloc_ptr malloc_fn, png_free_ptr free_fn)
{
#endif /* PNG_USER_MEM_SUPPORTED */

   volatile png_structp png_ptr;

#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
   jmp_buf jmpbuf;
#endif
#endif

   int i;

   png_debug(1, "in png_create_read_struct\n");
#ifdef PNG_USER_MEM_SUPPORTED
   if ((png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
      (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr)) == NULL)
#else
   if ((png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG)) == NULL)
#endif
   {
      return (png_structp)NULL;
   }

#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
   if (setjmp(jmpbuf))
#else
   if (setjmp(png_ptr->jmpbuf))
#endif
   {
      png_free(png_ptr, png_ptr->zbuf);
      png_ptr->zbuf=NULL;
      png_destroy_struct(png_ptr);
      return (png_structp)NULL;
   }
#ifdef USE_FAR_KEYWORD
   png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
#endif
#endif

#ifdef PNG_USER_MEM_SUPPORTED
   png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
#endif

   png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);

   i=0;
   do
   {
     if(user_png_ver[i] != png_libpng_ver[i])
        png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
   } while (png_libpng_ver[i++]);

   if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
   {
     /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
      * we must recompile any applications that use any older library version.
      * For versions after libpng 1.0, we will be compatible, so we need
      * only check the first digit.
      */
     if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
         (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
         (user_png_ver[0] == '0' && user_png_ver[2] < '9'))
     {
#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
        char msg[80];
        if (user_png_ver)
        {
          sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
             user_png_ver);
          png_warning(png_ptr, msg);
        }
        sprintf(msg, "Application  is running with png.c from libpng-%.20s",
           png_libpng_ver);
        png_warning(png_ptr, msg);
#endif
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
        png_ptr->flags=0;
#endif
        png_error(png_ptr,
           "Incompatible libpng version in application and library");
     }

     /* Libpng 1.0.6 was not binary compatible, due to insertion of the
        info_ptr->free_me member.  Libpng-1.0.1 and earlier were not
        compatible due to insertion of the user transform function. Note
        to maintainer: this test can be removed from version 1.2.0 and
        beyond because the previous test would have already rejected it. */

     if (user_png_ver[0] == '1' && user_png_ver[2] == '0' &&
         (user_png_ver[4] <  '2' || user_png_ver[4] == '6') &&
         user_png_ver[5] == '\0')
     {
#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
//.........这里部分代码省略.........

开发者ID:151706061，项目名称:ITK，代码行数:101，代码来源:pngread.c

示例12: png_destroy_read_struct

/* free all memory used by the read */
void PNGAPI
png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
   png_infopp end_info_ptr_ptr)
{
   png_structp png_ptr = NULL;
   png_infop info_ptr = NULL, end_info_ptr = NULL;
#ifdef PNG_USER_MEM_SUPPORTED
   png_free_ptr free_fn = NULL;
   png_voidp mem_ptr = NULL;
#endif

   png_debug(1, "in png_destroy_read_struct\n");
   /* save jump buffer and error functions */
   if (png_ptr_ptr != NULL)
      png_ptr = *png_ptr_ptr;

   if (info_ptr_ptr != NULL)
      info_ptr = *info_ptr_ptr;

   if (end_info_ptr_ptr != NULL)
      end_info_ptr = *end_info_ptr_ptr;

#ifdef PNG_USER_MEM_SUPPORTED
   free_fn = png_ptr->free_fn;
   mem_ptr = png_ptr->mem_ptr;
#endif

   png_read_destroy(png_ptr, info_ptr, end_info_ptr);

   if (info_ptr != NULL)
   {
#if defined(PNG_TEXT_SUPPORTED)
      png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1);
#endif

#ifdef PNG_USER_MEM_SUPPORTED
      png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
          (png_voidp)mem_ptr);
#else
      png_destroy_struct((png_voidp)info_ptr);
#endif
      *info_ptr_ptr = (png_infop)NULL;
   }

   if (end_info_ptr != NULL)
   {
#if defined(PNG_READ_TEXT_SUPPORTED)
      png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1);
#endif
#ifdef PNG_USER_MEM_SUPPORTED
      png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn,
         (png_voidp)mem_ptr);
#else
      png_destroy_struct((png_voidp)end_info_ptr);
#endif
      *end_info_ptr_ptr = (png_infop)NULL;
   }

   if (png_ptr != NULL)
   {
#ifdef PNG_USER_MEM_SUPPORTED
      png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
          (png_voidp)mem_ptr);
#else
      png_destroy_struct((png_voidp)png_ptr);
#endif
      *png_ptr_ptr = (png_structp)NULL;
   }
}

开发者ID:151706061，项目名称:ITK，代码行数:70，代码来源:pngread.c

注：本文中的png_destroy_struct函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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C++ png_destroy_struct函数代码示例

示例1: png_info_init_3

示例2: png_destroy_info_struct

示例3: png_destroy_read_struct

示例4: png_create_read_struct_2

示例5: png_read_init_3

示例6: png_create_read_struct_2

示例7: png_create_write_struct_2

示例8: png_destroy_read_struct

示例9: png_create_read_struct_2

示例10: png_create_read_struct_2

示例11: png_create_read_struct_2

示例12: png_destroy_read_struct

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