Check Raster Tile Data

CHECK_RASTER_TILE_DATA

See the source code.

This test verifies that raster tile data values at different layers and compression types are correctly delivered by the backend.

1. Frontend sends: OPEN_FILE (OpenFile)

   directory = "set_QA"
   file = "cluster_04096.fits"
   hdu = "0"
   file_id = 0
   render_mode = RASTER
   

2. Backend returns: OPEN_FILE_ACK (OpenFileAck)

Check 1: the OPEN_FILE_ACK should satisfy:

• OPEN_FILE_ACK.success = True

3. Frontend sends: ADD_REQUIRED_TILES (AddRequiredTiles) with NONE compression

   file_id = 0
   compression_quality = 11
   compression_type = NONE
   tiles = [0]
   

4. Backend returns: RASTER_TILE_DATA (RasterTileData)

Check 2: the RASTER_TILE_DATA should satisfy:

• RASTER_TILE_DATA.file_id = 0

• RASTER_TILE_DATA.channel = 0

• RASTER_TILE_DATA.stokes = 0

• RASTER_TILE_DATA.compression_type = NONE

• RASTER_TILE_DATA.tiles.length = 1

• RASTER_TILE_DATA.tiles[0].x = 0, y = 0, layer = 0

• RASTER_TILE_DATA.tiles[0].height = 256, width = 256

• RASTER_TILE_DATA.tiles[0].image_data at pixel (256,256) = 2.72519

ZFP compression at multiple layers (layers 1-4)

5. Frontend sends: ADD_REQUIRED_TILES (AddRequiredTiles) for each of 4 layers with ZFP compression

   file_id = 0
   compression_type = ZFP
   compression_quality = 11
   

Check 3: for each layer, the RASTER_TILE_DATA should satisfy:

• RASTER_TILE_DATA.file_id = 0

• RASTER_TILE_DATA.channel = 0

• RASTER_TILE_DATA.stokes = 0

• RASTER_TILE_DATA.compression_type = ZFP

• Each tile has correct x, y, layer, height (256), and width (256)

• Image data length and spot-check byte values at indices [0, 50000, 100000, 150000, 200000] match expected values