Function PrecalculateTileInfo

third-party/tinyexr/tinyexr.h:5594–5632

}

static bool PrecalculateTileInfo(std::vector<int>& num_x_tiles,
  std::vector<int>& num_y_tiles,
  const EXRHeader* exr_header) {
  int min_x = exr_header->data_window.min_x;
  int max_x = exr_header->data_window.max_x;
  int min_y = exr_header->data_window.min_y;
  int max_y = exr_header->data_window.max_y;

  int num_x_levels = CalculateNumXLevels(exr_header);

  if (num_x_levels < 0) {
    return false;
  }

  int num_y_levels = CalculateNumYLevels(exr_header);

  if (num_y_levels < 0) {
    return false;
  }

  num_x_tiles.resize(size_t(num_x_levels));
  num_y_tiles.resize(size_t(num_y_levels));

  if (!CalculateNumTiles(num_x_tiles,
    max_x - min_x + 1,
    exr_header->tile_size_x,
    exr_header->tile_rounding_mode)) {
    return false;
  }

  if (!CalculateNumTiles(num_y_tiles,
    max_y - min_y + 1,
    exr_header->tile_size_y,
    exr_header->tile_rounding_mode)) {
    return false;
  }

  return true;
}

static void InitSingleResolutionOffsets(OffsetData& offset_data, size_t num_blocks) {
  offset_data.offsets.resize(1);