C++ (Cpp) _openslide_tiff_read_tile_data Beispiele

Beispiel #1

Datei: openslide-vendor-aperio.c Projekt: peteter/openslide

static bool decode_tile(struct level *l,
                        TIFF *tiff,
                        uint32_t *dest,
                        int64_t tile_col, int64_t tile_row,
                        GError **err) {
  struct _openslide_tiff_level *tiffl = &l->tiffl;

  // some Aperio slides have some zero-length tiles, possibly due to an
  // encoder bug
  bool is_empty;
  if (!check_for_empty_tile(tiffl, tiff,
                            tile_col, tile_row,
                            &is_empty, err)) {
    return false;
  }
  if (is_empty) {
    // fill with transparent
    memset(dest, 0, tiffl->tile_w * tiffl->tile_h * 4);
    return true;
  }

  // select color space
  enum _openslide_jp2k_colorspace space;
  switch (l->compression) {
  case APERIO_COMPRESSION_JP2K_YCBCR:
    space = OPENSLIDE_JP2K_YCBCR;
    break;
  case APERIO_COMPRESSION_JP2K_RGB:
    space = OPENSLIDE_JP2K_RGB;
    break;
  default:
    // not for us? fallback
    return _openslide_tiff_read_tile(tiffl, tiff, dest,
                                     tile_col, tile_row,
                                     err);
  }

  // read raw tile
  void *buf;
  int32_t buflen;
  if (!_openslide_tiff_read_tile_data(tiffl, tiff,
                                      &buf, &buflen,
                                      tile_col, tile_row,
                                      err)) {
    return false;  // ok, haven't allocated anything yet
  }

  // decompress
  bool success = _openslide_jp2k_decode_buffer(dest,
                                               tiffl->tile_w, tiffl->tile_h,
                                               buf, buflen,
                                               space,
                                               err);

  // clean up
  g_free(buf);

  return success;
}

Beispiel #2

Datei: openslide-vendor-aperio.c Projekt: MIRCen/openslide

static bool decode_tile(struct level *l,
                        TIFF *tiff,
                        uint32_t *dest,
                        int64_t tile_col, int64_t tile_row,
                        GError **err) {
  struct _openslide_tiff_level *tiffl = &l->tiffl;

  // check for missing tile
  int64_t tile_no = tile_row * tiffl->tiles_across + tile_col;
  if (g_hash_table_lookup_extended(l->missing_tiles, &tile_no, NULL, NULL)) {
    //g_debug("missing tile in level %p: (%"PRId64", %"PRId64")", (void *) l, tile_col, tile_row);
    return render_missing_tile(l, tiff, dest,
                               tile_col, tile_row, err);
  }

  // select color space
  enum _openslide_jp2k_colorspace space;
  switch (l->compression) {
  case APERIO_COMPRESSION_JP2K_YCBCR:
    space = OPENSLIDE_JP2K_YCBCR;
    break;
  case APERIO_COMPRESSION_JP2K_RGB:
    space = OPENSLIDE_JP2K_RGB;
    break;
  default:
    // not for us? fallback
    return _openslide_tiff_read_tile(tiffl, tiff, dest,
                                     tile_col, tile_row,
                                     err);
  }

  // read raw tile
  void *buf;
  int32_t buflen;
  if (!_openslide_tiff_read_tile_data(tiffl, tiff,
                                      &buf, &buflen,
                                      tile_col, tile_row,
                                      err)) {
    return false;  // ok, haven't allocated anything yet
  }

  // decompress
  bool success = _openslide_jp2k_decode_buffer(dest,
                                               tiffl->tile_w, tiffl->tile_h,
                                               buf, buflen,
                                               space,
                                               err);

  // clean up
  g_free(buf);

  return success;
}