Converts drawing thumbnail bytes to a browser-displayable data URL.
Accepts PNG, JPEG, full BMP files, and DIB payloads (same wrapping as
acdbPreviewIconToDataUrl). Used for DXF THUMBNAILIMAGE and DWG
preview bitmaps (Database.ThumbnailBitmap).
Parameters
data: undefined|null|Uint8Array
Raw thumbnail bytes, or an empty buffer when none exist.
Returns string|undefined
A data URL, or undefined when the payload is empty/unsupported.
Converts drawing thumbnail bytes to a browser-displayable data URL.
Accepts PNG, JPEG, full BMP files, and DIB payloads (same wrapping as acdbPreviewIconToDataUrl). Used for DXF
THUMBNAILIMAGEand DWG preview bitmaps (Database.ThumbnailBitmap).