pdfParseContent

Purpose — Replay the current page's content stream through a table of caller-supplied callback functions, one call per operator.

Description — Parses the active page (when the document holds no authored page — an import-only document — page 1 of the import source is parsed instead, with its content streams decoded first, the same fallback pdfExtractText uses) and dispatches every content operator to the matching callback in Stack: path construction (MoveTo, LineTo, the three BezierTo forms, Rectangle, ClosePath, ClipPath), graphics state (SaveGraphicState/RestoreGraphicState — the full state including the text-state parameters, per ISO 32000 — MulMatrix, SetLineWidth and the other state setters), font selection (SetFont, delivered with the resolved font's name, style, size and embedding state) and text showing.

Text arrives through ShowTextArrayW/ShowTextArrayA as per-record arrays: the W form carries text decoded to Unicode (imported fonts are decoded through their own /ToUnicode maps, two-byte encodings included) together with per-record kerning and advance widths in text space; the text matrix advances record by record. Coordinates handed to the path callbacks are already multiplied through the current transformation matrix. Do operators recurse into the page's Form XObjects (depth-limited to guard against cyclic form references).

Only callbacks the caller assigned are invoked — unused slots may be NULL; every non-NULL slot is validated as a readable pointer before parsing begins.

Declarations

BOOL32 __stdcall pdfParseContent(PPDF IPDF, void* Data, TPDFParseInterface* Stack, int32_t Flags);

function pdfParseContent(const IPDF: PPDF; const Data: Pointer; var Stack: TPDFParseInterface; Flags: Integer): LongBool; stdcall; external 'LumasPdf.dll';

Parameters

Return value — TRUE once the page has been replayed; FALSE when the instance handle is invalid, a non-NULL callback slot is not a readable pointer, or the page's content cannot be read.

Remarks — For finding, replacing or deleting content rather than observing it, the psr* content-parser surface (psrParsePage) offers an editable object model of the same content; pdfParseContent is the streaming, callback-driven view.

C# (P/Invoke)

[return: MarshalAs(UnmanagedType.Bool)]