PDFium Delphi Component Docs

PDFium supporting declarations

Unit: PDFium

Public aliases, records, callback types, and constants used by the high-level component API are grouped here when they do not require a dedicated workflow page

Collections and result aliases

Declaration	Purpose
`TPdfStringArray`, `TLinkAnnotations`, `TWebLinks`	Dynamic arrays returned by string and link APIs
`TPdfStructuredTextSpans`, `TPdfStructuredTextLines`, `TPdfStructuredTextBlocks`	Nested arrays used by structured text extraction
`TPdfOcrWords`, `TPdfOcrPageReports`, `TPdfReflowNodes`, `TPdfTableCells`	OCR, reflow, and table-analysis result collections
`TPdfLoadIssues`, `TPdfBatchMergeIssues`, `TPdfPagePlanImpacts`, `TPdfParallelPageResults`	Load audit, merge, page-planning, and parallel-work result collections
`TPdfSearchHighlightRanges`	Search ranges used by viewer highlighting

Records, enums, and callbacks

Declaration	Purpose
`TPdfContentFragment`, `TPdfReadingOrderSource`	Semantic reading content and its source classification; fragments carry a `BoundingRect` and `MarkedContentIDs`, and the source is `rosStructure` or `rosHeuristic`
`TPdfContentMark`, `TPdfPageContentMarkInfo`, `TPdfMarkParamKind`	Typed marked-content parameters and page-object tagging state; each mark info reports `ObjectKind`, `IsArtifact`, `HasLanguage`, `LanguageValid`, and `ActualTextApplied`
`TPdfDestinationViewParameters`	Decoded destination fit mode and optional page coordinates
`TQuadrilateralPoint`, `TQuadrilateralPoints`, `TPdfAnnotationFlags`	Annotation geometry and flag sets
`TPdfBatchMergeProgressEvent`	Progress callback used by batch merge operations
`TPdfJsPlatformInfo`, `PPdfJsPlatformInfo`, `PPdfFormFillInfo`	JavaScript platform and form-fill callback records passed to PDFium
`TFPDFText_GetUnicode`	Optional text callback signature used to retrieve Unicode values
`TFontCacheEntry`	Internal-facing public record retained for source compatibility with the font cache
`TPdfTransientTextPage`	Scoped text-page holder used by extraction workflows
`TTileKey`, `TPdfTileCache`	Revision-aware render-tile key and bounded bitmap cache

Resource and highlight limits

Declaration	Purpose
`PdfLoadDefaultMaxObjectNumber`, `PdfLoadDefaultMaxXrefEntries`, `PdfLoadDefaultMaxXrefSections`, `PdfLoadDefaultMaxIssues`, `PdfLoadDefaultAuditByteLimit`	Default structural audit bounds applied whilst loading untrusted documents
`PdfObjectStreamDefaultMaxObjects`, `PdfObjectStreamDefaultMaxDecodedBytes`	Default limits for decoded PDF object streams
`PdfSearchHighlightAlpha`, `PdfSelectionHighlightAlpha`, `PdfReadingHighlightAlpha`, `PdfReadingWordAlpha`	Viewer overlay opacity defaults for search, selection, and reading cursors

Optional rendering capability queries

Declaration	Purpose
`GetSkiaRenderCapabilities`	Reports which optional Skia rendering entry points are available in the loaded PDFium build
`GetPrintOutputCapabilities`	Reports optional spot-colour and overprint output capabilities exposed by the print-output module

Optional print-output ABI

Declaration	Purpose
`PdfPrintOutputCapabilitySpotPlateEnumeration`, `PdfPrintOutputCapabilitySpotPlateRendering`, `PdfPrintOutputCapabilityOverprintDetection`, `PdfPrintOutputCapabilityOverprintPreview`	Capability bits returned by an optional print-output module
`PdfPrintOutputExportAbiVersion`, `PdfPrintOutputExportCapabilities`, `PdfPrintOutputExportCountSpotPlates`, `PdfPrintOutputExportGetSpotPlateName`, `PdfPrintOutputExportPageUsesOverprint`, `PdfPrintOutputExportRenderSpotPlate`, `PdfPrintOutputExportRenderOverprintPreview`	Export names resolved from the optional print-output module
`TPDFiumPas_GetPrintOutputAbiVersion`, `TPDFiumPas_GetPrintOutputCapabilities`, `TPDFiumPas_PageCountSpotPlates`, `TPDFiumPas_PageGetSpotPlateName`, `TPDFiumPas_PageUsesOverprint`, `TPDFiumPas_RenderSpotPlate`, `TPDFiumPas_RenderOverprintPreview`	Function-pointer types for the corresponding optional exports