THotPDF.DecodeLoadedImageStream Method

Decodes one loaded image XObject stream into a caller-owned TBitmap, including supported filter and color-space processing

Declaration

function DecodeLoadedImageStream(AImageStream: THPDFStreamObject): TBitmap;

HPDFDoc

Name	Purpose
`AImageStream`	Loaded image XObject stream to inspect and decode

Returns a newly allocated TBitmap on success or nil when the image format or geometry is unsupported

The caller owns a non-nil returned bitmap and must free it
Flate and LZW streams apply predictor geometry from DecodeParms or DP
LZW decoding honours EarlyChange and rejects invalid dictionary transitions instead of treating compressed bytes as pixels
TIFF Predictor 2 and PNG predictors 10 through 15 are supported for complete rows with valid image geometry
Width, height, component count, bit depth, row size, and output size are checked before raster allocation
Malformed Flate, LZW, or predictor data raises its decoding exception so callers can distinguish corruption from an unsupported image format
Use ExtractLoadedImage when selecting images by the index returned from loaded-image enumeration