213 read_user_callback(png_structp png_ptr, png_row_infop row_info, png_bytep data)  in read_user_callback()  argument
216    PNG_UNUSED(row_info)  in read_user_callback()
229 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)  in count_zero_samples()  argument
246    if (row_info->color_type == 0 || row_info->color_type == 3)  in count_zero_samples()
251       for (n = 0, nstop=row_info->width; n<nstop; n++)  in count_zero_samples()
253          if (row_info->bit_depth == 1)  in count_zero_samples()
265          if (row_info->bit_depth == 2)  in count_zero_samples()
277          if (row_info->bit_depth == 4)  in count_zero_samples()
289          if (row_info->bit_depth == 8)  in count_zero_samples()
293          if (row_info->bit_depth == 16)  in count_zero_samples()
305       int color_channels = row_info->channels;  in count_zero_samples()
306       if (row_info->color_type > 3)  in count_zero_samples()
309       for (n = 0, nstop=row_info->width; n<nstop; n++)  in count_zero_samples()
313             if (row_info->bit_depth == 8)  in count_zero_samples()
317             if (row_info->bit_depth == 16)  in count_zero_samples()
325          if (row_info->color_type > 3)  in count_zero_samples()
328             if (row_info->bit_depth == 16)  in count_zero_samples()