C++ (Cpp) rpng_nbio_load_image_argb_iterate примеры использования

Пример #1

Файл: runloop_data.c Проект: CautiousAlbino/RetroArch

static int rarch_main_data_image_iterate_transfer(nbio_handle_t *nbio)
{
   unsigned i;

   if (!nbio)
      return -1;

   if (nbio->image.is_finished)
      return 0;

   for (i = 0; i < nbio->image.pos_increment; i++)
   {
      if (!rpng_nbio_load_image_argb_iterate(
               nbio->image.handle->buff_data,
               nbio->image.handle))
         goto error;

      nbio->image.handle->buff_data += 
         4 + 4 + nbio->image.handle->chunk.size + 4;
   }

   nbio->image.frame_count++;
   return 0;

error:
   return -1;
}

Пример #2

Файл: rpng_test.c Проект: AirBrowse/RetroArch

static bool rpng_nbio_load_image_argb(const char *path, uint32_t **data,
      unsigned *width, unsigned *height)
{
   int retval;
   size_t file_len;
   bool ret = true;
   struct rpng_t *rpng = NULL;
   void *ptr = NULL;
   unsigned val = 0;
   struct nbio_t* handle = (void*)nbio_open(path, NBIO_READ);

   if (!handle)
      goto end;

   ptr  = nbio_get_ptr(handle, &file_len);

   nbio_begin_read(handle);

   while (!nbio_iterate(handle));

   ptr = nbio_get_ptr(handle, &file_len);

   if (!ptr)
   {
      ret = false;
      goto end;
   }

   rpng = (struct rpng_t*)calloc(1, sizeof(struct rpng_t));

   if (!rpng)
   {
      ret = false;
      goto end;
   }

   rpng->buff_data = (uint8_t*)ptr;

   if (!rpng->buff_data)
   {
      ret = false;
      goto end;
   }

   if (!rpng_nbio_load_image_argb_start(rpng))
   {
      ret = false;
      goto end;
   }

   while (rpng_nbio_load_image_argb_iterate(
            rpng->buff_data, rpng, &val))
   {
      rpng->buff_data += val;
   }

#if 0
   fprintf(stderr, "has_ihdr: %d\n", rpng->has_ihdr);
   fprintf(stderr, "has_idat: %d\n", rpng->has_idat);
   fprintf(stderr, "has_iend: %d\n", rpng->has_iend);
#endif

   if (!rpng->has_ihdr || !rpng->has_idat || !rpng->has_iend)
   {
      ret = false;
      goto end;
   }
   
   do
   {
      retval = rpng_nbio_load_image_argb_process(rpng, data, width, height);
   }while(retval == IMAGE_PROCESS_NEXT);

   if (retval == IMAGE_PROCESS_ERROR || retval == IMAGE_PROCESS_ERROR_END)
      ret = false;

end:
   if (handle)
      nbio_free(handle);
   if (rpng)
      rpng_nbio_load_image_free(rpng);
   rpng = NULL;
   if (!ret)
      free(*data);
   return ret;
}