length is zero or offset is beyond the end of parent's data. Destroy with [harfbuzz.global.blobDestroy].
blobCreateSubBlob
fn
harfbuzz.blob.Blob blobCreateSubBlob(harfbuzz.blob.Blob parent, uint offset, uint length)Returns a blob that represents a range of bytes in parent. The new blob is always created with #HB_MEMORY_MODE_READONLY, meaning that it will never modify data in the parent blob. The parent data is not expected to be modified, and will result in undefined behavior if it is.
Makes parent immutable.
Parameters
parent | Parent blob. |
offset | Start offset of sub-blob within parent, in bytes. |
length | Length of sub-blob. |
Returns
New blob, or the empty blob if something failed or if