This function specifies the type of compression for the specified HDF GR raster image.
Syntax
Result = HDF_GR_SETCOMPRESS(ri_id, comp_type, comp_prm)
Return Value
Returns SUCCEED (0) if successful or FAIL (-1) otherwise.
Arguments
ri_id
Raster image identifier returned by HDF_GR_CREATE or HDF_GR_SELECT.
comp_type
Compression method for the image data. Valid values are:
- 0 = no compression
- 1 = RLE run-length encoding
- 3 = Skipping Huffman compression
- 4 = GZIP compression
- 6 = JPEG compression
comp_prm
Compression parameters. If Skipping Huffman is used, set comp_parm to the skipping size (the size in bytes of the data elements). If GZIP compression is used, set comp_parm to an integer ranging from 1 (fastest) to 9 (most compressed).
Keywords
None
Version History