Raw bytes of an embedded image stream

Returns the bytes that back the image object - either the uncompressed pixel buffer (decoded = TRUE) or the raw embedded stream as it sits in the PDF (decoded = FALSE). The raw form is useful when you want to write the original JPEG / JBIG2 / JPEG2000 / Flate-deflated bitmap to disk without re-encoding; pair it with pdf_image_filters() to know which decoders the PDF specifies.

Usage

pdf_image_data(obj, decoded = TRUE)

Arguments

obj

A pdfium_obj of type "image".

decoded

Logical scalar. TRUE (default) returns the decompressed pixel data after applying all filters; FALSE returns the stream bytes as stored.

Value

A raw vector. Length is whatever PDFium reports - the filter-applied size for decoded = TRUE, the stored byte count for decoded = FALSE.

Details

Wraps FPDFImageObj_GetImageDataDecoded or FPDFImageObj_GetImageDataRaw (chosen by decoded).

See also

pdf_image_filters(), pdf_image_bitmap().