Pdf1.FileName := 'C:\MyDocument.pdf';
Pdf1.Active := True;
ShowMessage('Pages: ' + IntToStr(Pdf1.PageCount));
ShowMessage('Title: ' + Pdf1.Title);
ShowMessage('Author: ' + Pdf1.Author);
var
Stream: TMemoryStream;
begin
Stream := TMemoryStream.Create;
try
Stream.LoadFromFile('C:\MyDocument.pdf');
Pdf1.LoadDocument(Stream, True);
Pdf1.Active := True;
ShowMessage('PDF loaded from stream');
finally
Stream.Free;
end;
end;Pdf1.CreateDocument;
Pdf1.Active := True;
Pdf1.AddPage(0, 612, 792);
Pdf1.PageNumber := 1;
Pdf1.AddText('Hello World!', 'Arial', 12, 100, 700, clBlack, $FF, 0.0);
Pdf1.UpdatePage;
Pdf1.SaveAs('C:\NewDocument.pdf');
Pdf1.Active := False;var
PageText: WString;
RectText: WString;
begin
Pdf1.PageNumber := 1;
PageText := Pdf1.Text;
Memo1.Text := PageText;
RectText := Pdf1.TextInRectangle(100, 100, 500, 200);
ShowMessage('Text in rectangle: ' + RectText);
end;var
Position: Integer;
begin
Position := Pdf1.FindFirst('Hello', [seCaseSensitive]);
while Position >= 0 do
begin
ShowMessage('Found at character: ' + IntToStr(Position));
Position := Pdf1.FindNext;
end;
end;Pdf1.PageNumber := 1;
Pdf1.AddText('Document Title', 'Times New Roman', 16, 100, 750, clBlue);
Pdf1.AddText('This is the document content.', 'Arial', 12, 100, 700, clBlack);
Pdf1.UpdatePage;var
I: Integer;
MetricSize: Single;
FontBytes: TBytes;
begin
Pdf1.PageNumber := 1;
for I := 0 to Pdf1.ObjectCount - 1 do
if Pdf1.ObjectType[I] = otText then
begin
MetricSize := 12.0;
FontBytes := Pdf1.FontData[I];
Memo1.Lines.Add('Object ' + IntToStr(I));
Memo1.Lines.Add('Base name: ' + Pdf1.FontBaseName[I]);
Memo1.Lines.Add('Family: ' + Pdf1.FontFamilyName[I]);
Memo1.Lines.Add('Embedded: ' + BoolToStr(Pdf1.FontIsEmbedded[I], True));
Memo1.Lines.Add('Weight: ' + IntToStr(Pdf1.FontWeight[I]));
Memo1.Lines.Add('Italic angle: ' + IntToStr(Pdf1.FontItalicAngle[I]));
Memo1.Lines.Add('Ascent: ' + FloatToStr(Pdf1.FontAscent[I, MetricSize]));
Memo1.Lines.Add('Descent: ' + FloatToStr(Pdf1.FontDescent[I, MetricSize]));
Memo1.Lines.Add('Font data bytes: ' + IntToStr(Length(FontBytes)));
end;
if Pdf1.CharacterCount > 0 then
begin
Memo1.Lines.Add('First character size: ' + FloatToStr(Pdf1.CharacterFontSize[0]));
Memo1.Lines.Add('First character weight: ' + IntToStr(Pdf1.CharacterFontWeight[0]));
Memo1.Lines.Add('First character angle: ' + FloatToStr(Pdf1.CharacterAngle[0]));
end;
end;The Demo\Delphi\FontProperties, Demo\CBuilder\FontProperties, and Demo\Lazarus\FontProperties projects show the same metadata through both TPdf and TPdfView.
The Demo\Delphi\ContentExtractionLab, Demo\CBuilder\ContentExtractionLab, and Demo\Lazarus\ContentExtractionLab projects turn content extraction into a single workflow. They open or create a PDF, let users choose metadata, page text, page objects, images, attachments, links, annotations, bookmarks, and font / character metrics, then generate a summary plus a detailed TXT or JSON report. The lab also includes all / none category selection, report copy-to-clipboard, and source-PDF save actions so users can keep the generated sample PDF beside its extraction report. The older ExtractText, ExtractTextPages, ExtractImages, Attachment, and FontProperties demos remain focused examples; ExtractTextPages writes one TXT file per page across Delphi, C++Builder, and Lazarus, while ContentExtractionLab is the cross-cutting inventory sample.
var
I: Integer;
FieldInfo: TPdfFormFieldInfo;
begin
Pdf1.FormField[0] := 'John';
for I := 0 to Pdf1.FormFieldCount - 1 do
begin
FieldInfo := Pdf1.FormFieldInfo[I];
ShowMessage(FieldInfo.Name + ': ' + Pdf1.FormField[I]);
end;
end;// Without flattening, FormField[i] := value writes only the /V entry —
// the visible appearance comes from the /AP stream and may not refresh.
// GenerateFormAppearances regenerates /AP for every widget, then
// FlattenAllPages bakes every page's annotations and widgets into
// permanent, non-editable content.
Pdf1.FileName := 'C:\Application.pdf';
Pdf1.Active := True;
Pdf1.FormField[0] := 'John Smith';
Pdf1.FormField[1] := 'john@example.com';
Pdf1.GenerateFormAppearances;
if Pdf1.FlattenAllPages then
Pdf1.SaveAs('C:\Application.flat.pdf');
Pdf1.Active := False;var
I: Integer;
Bitmap: TBitmap;
begin
for I := 0 to Pdf1.BitmapCount - 1 do
begin
Bitmap := Pdf1.Bitmap[I];
try
Bitmap.SaveToFile('C:\ExtractedImage' + IntToStr(I) + '.bmp');
finally
Bitmap.Free;
end;
end;
end;var
JpegStream: TFileStream;
begin
JpegStream := TFileStream.Create('C:\MyImage.jpg', fmOpenRead or fmShareDenyWrite);
try
Pdf1.AddJpegImage(JpegStream, 100, 500, 200, 150);
finally
JpegStream.Free;
end;
Pdf1.AddPicture(Image1.Picture, 100, 300, 150, 100);
Pdf1.UpdatePage;
end;var
I: Integer;
Annotation: TPdfAnnotation;
begin
for I := 0 to Pdf1.AnnotationCount - 1 do
begin
Annotation := Pdf1.Annotation[I];
ShowMessage('Annotation ' + IntToStr(I) + ': ' + Annotation.ContentsText);
end;
end;Pdf1.CreatePath(100, 100, 200, 150, fmAlternate, clYellow, $FF, True, clBlack, $FF, 2.0);
Pdf1.AddPath;
Pdf1.CreatePath(100, 100, fmNone, clBlack, $FF, True, clRed, $FF, 3.0);
Pdf1.LineTo(200, 100);
Pdf1.LineTo(150, 200);
Pdf1.ClosePath;
Pdf1.AddPath;
Pdf1.UpdatePage;var
I: Integer;
Bookmarks: TBookmarks;
begin
Bookmarks := Pdf1.Bookmarks;
for I := 0 to Length(Bookmarks) - 1 do
ShowMessage(Bookmarks[I].Title + ' -> Page ' + IntToStr(Bookmarks[I].PageNumber));
end;var
I: Integer;
Destination: TDestination;
begin
for I := 0 to Pdf1.DestinationCount - 1 do
begin
Destination := Pdf1.Destination[I];
if Destination.Name = 'Chapter1' then
begin
Pdf1.PageNumber := Destination.PageNumber;
Break;
end;
end;
end;var
I: Integer;
AttachmentData: TBytes;
AttachmentName: WString;
FileStream: TFileStream;
begin
for I := 0 to Pdf1.AttachmentCount - 1 do
begin
AttachmentName := Pdf1.AttachmentName[I];
AttachmentData := Pdf1.Attachment[I];
FileStream := TFileStream.Create('C:\Extracted_' + string(AttachmentName), fmCreate);
try
if Length(AttachmentData) > 0 then
FileStream.WriteBuffer(AttachmentData[0], Length(AttachmentData));
finally
FileStream.Free;
end;
end;
if Pdf1.CreateAttachment('MyFile.txt') then
Pdf1.Attachment[Pdf1.AttachmentCount - 1] := TFile.ReadAllBytes('C:\MyFile.txt');
end;Pdf1.AddPage(Pdf1.PageCount + 1, 612, 792);
Pdf1.AddPage(Pdf1.PageCount + 1, 595, 842);
Pdf1.AddPage(Pdf1.PageCount + 1, 400, 600);
var
SourcePdf: TPdf;
begin
SourcePdf := TPdf.Create(nil);
try
SourcePdf.FileName := 'C:\SourceDocument.pdf';
SourcePdf.Active := True;
Pdf1.ImportPages(SourcePdf, '1', Pdf1.PageCount + 1);
finally
SourcePdf.Free;
end;
end;
if Pdf1.PageCount > 1 then
Pdf1.DeletePage(Pdf1.PageCount);// Create a compressed PDF document
Pdf1.CreateDocument;
Pdf1.Compressed := True; // ensure all streams are FlateDecode compressed (default)
Pdf1.Active := True;
Pdf1.AddPage(0, 595, 842); // A4 size
Pdf1.AddText('Hello World!', 'Arial', 24, 100, 700, clBlack, $FF, 0.0);
Pdf1.SaveAs('C:\Compressed.pdf');
Pdf1.Active := False;
// Save with options
Pdf1.SaveAs('C:\Output.pdf', saIncremental); // incremental save
Pdf1.SaveAs('C:\NoSecurity.pdf', saRemoveSecurity); // remove security
// Save to a specific PDF version target. The PDF version validator rejects
// any feature introduced after the chosen target (JBIG2Decode, MarkInfo,
// AES encryption, Polygon / Caret / Watermark / Redact annotations, ...).
if not Pdf1.SaveAs('C:\Legacy15.pdf', saNone, pv15) then
ShowMessage('Save rejected: document contains features newer than PDF 1.5');// SaveAsPdfA post-processes the base save with an incremental update that
// injects an XMP metadata stream, an sRGB ICC OutputIntent, and an updated
// document catalog so the result is PDF/A-1b conformant. The bundled
// sRGB IEC61966-2.1 profile is used automatically when no custom profile
// is supplied.
Pdf1.FileName := 'C:\Report.pdf';
Pdf1.Active := True;
if Pdf1.SaveAsPdfA('C:\Report.pdfa.pdf', pac1b) then
ShowMessage('Saved PDF/A-1b archive');
// PDF/A with a custom ICC profile (CMYK printing pipelines for example)
var
Opts: TPdfASaveOptions;
begin
Opts := Default(TPdfASaveOptions);
Opts.Conformance := pac1b;
Opts.IccProfileData := TFile.ReadAllBytes('C:\Profiles\Coated_GRACoL_2006.icc');
Pdf1.SaveAsPdfA('C:\Report.cmyk.pdfa.pdf', Opts);
end;
// In-memory PDF/A output
var
Stream: TMemoryStream;
begin
Stream := TMemoryStream.Create;
try
Opts := Default(TPdfASaveOptions);
Opts.Conformance := pac1b;
if Pdf1.SaveAsPdfAToStream(Stream, Opts) then
UploadToArchive(Stream);
finally
Stream.Free;
end;
end;var
Validation: TPdfAValidationResult;
Issue: TPdfAValidationIssue;
begin
Pdf1.FileName := 'C:\Incoming\report.pdf';
Pdf1.Active := True;
// Cheap header-style probe — reads the conformance without iterating
// the full validator. Result: pacNone, pac1a, pac1b, pac2b, pac3b, or
// pacUnknown.
case Pdf1.PdfAConformance of
pac1b: Status.Caption := 'PDF/A-1b';
pac2b: Status.Caption := 'PDF/A-2b';
pacNone: Status.Caption := 'Not PDF/A';
else
Status.Caption := 'Unknown conformance';
end;
// Full validator with per-issue diagnostics
Validation := Pdf1.ValidatePdfA;
Memo1.Lines.Add('Conformance: ' + GetEnumName(TypeInfo(TPdfAConformance),
Ord(Validation.Conformance)));
for Issue in Validation.Issues do
Memo1.Lines.Add('- ' + Issue.Description);
end;The Demo\Delphi\StandardsLab, Demo\CBuilder\StandardsLab, and Demo\Lazarus\StandardsLab projects load or create a PDF, run ValidatePdfA, ValidatePdfUa, ValidatePdfE, ValidatePdfX, ValidatePdfR, and ValidatePdfVT, then show each detected conformance level and issue count in one grid. Their save buttons call SaveAsPdfA, SaveAsPdfUa, SaveAsPdfE, SaveAsPdfX, SaveAsPdfR, and SaveAsPdfVT so the marker-output workflow is visible without writing a custom harness.
The FPdfPreflightReport unit wraps ValidatePdfA, ValidatePdfUa, ValidatePdfE, ValidatePdfX, ValidatePdfR, and ValidatePdfVT into one report object. Demo\Delphi\PreflightReport, Demo\Lazarus\PreflightReport, and Demo\CBuilder\PreflightReport let users choose standards, generate a summary, inspect status, priority, issue categories, category counts, next actions, issue codes, and recommended actions, switch the preview between text, Markdown, JSON, and CSV, and export TXT, HTML, Markdown, JSON, or CSV reports. Demo\Delphi\PreflightReportCli exposes the same report path as a console workflow with input / output arguments, optional password, output format selection, standard filtering, optional single-file attach=output.pdf report embedding, failon= CI gating exit codes, batch=list.txt processing, batchdir=folder directory scanning with optional recursion and stable path-sorted processing, outdir=reports report routing, collision-safe report names for duplicate input file names, TXT / JSON / HTML summaries with aggregate and standard status totals, CSV row manifests with run settings repeated per item, and a no-argument sample mode for scripts and CI jobs. The generated report states that the built-in validators cover marker-level and selected file-level checks, so full content-level preflight can still be delegated to a dedicated validation engine.
// LoadCustomDocument lets PDFium pull blocks from any seekable TStream on
// demand. The stream is NOT copied into memory, so multi-GB PDFs, remote
// HTTP body streams, and database-backed sources are all viable without
// an up-front buffer.
var
FileStream: TFileStream;
begin
// Read-from-file streaming (no in-memory copy)
FileStream := TFileStream.Create('C:\Huge.pdf',
fmOpenRead or fmShareDenyWrite);
Pdf1.LoadCustomDocument(FileStream, True{AOwnsStream});
// ^^ ownership transferred — Pdf1 frees FileStream on UnloadDocument.
Pdf1.Active := True;
ShowMessage('Pages: ' + IntToStr(Pdf1.PageCount));
end;
// Externally-owned stream (caller frees it after UnloadDocument)
var
Stream: TFileStream;
begin
Stream := TFileStream.Create('C:\Live.pdf',
fmOpenRead or fmShareDenyNone);
try
Pdf1.LoadCustomDocument(Stream, False);
Pdf1.Active := True;
DoWork;
Pdf1.Active := False;
finally
Stream.Free;
end;
end;// FPdfAsync exposes IPdfCancellationToken /
// IPdfCancellationTokenSource for cancel-from-UI semantics that work
// across the long-running export and render paths.
uses FPdfAsync;
var
CancelSource: IPdfCancellationTokenSource;
CancelToken: IPdfCancellationToken;
begin
CancelSource := PdfCancellationTokenSource;
CancelToken := CancelSource.Token;
// ... user clicks Cancel ...
CancelSource.Cancel;
// The worker periodically checks CancelToken.IsCancelled, or the render
// path polls it through PDFium's IFSDK_PAUSE callback.
if CancelToken.IsCancelled then
Memo1.Lines.Add('Cancelled by user');
end;// RenderPageProgressive lets a long high-DPI render abort mid-page when
// the user clicks Cancel, instead of blocking the caller until done.
var
Status: TPdfProgressiveStatus;
Bitmap: TBitmap;
begin
Bitmap := TBitmap.Create;
try
Bitmap.PixelFormat := pf32bit;
Bitmap.SetSize(2480, 3508); // A4 @ 300 DPI
Status := Pdf1.RenderPageProgressive(Bitmap, 0, 0, Bitmap.Width,
Bitmap.Height, CancelToken, ro0, [reAnnotations], clWhite);
case Status of
prsDone: SaveBitmap(Bitmap);
prsCancelled: Memo1.Lines.Add('Render cancelled — partial result available');
prsFailed: Memo1.Lines.Add('PDFium reported FPDF_RENDER_FAILED');
end;
finally
Bitmap.Free;
end;
end;// TPdfFuture<T> spins up a worker on a background thread and posts a
// TPdfFutureResult<T> envelope back to the main thread.
//
// Important: TPdf serializes render calls per instance, but the worker still
// owns dispatch and document lifetime. Do not mutate a TPdf while a render is
// in flight; batch export usually keeps one TPdf per file.
type
TRenderResult = record
Bitmap : TBitmap;
PageNo : Integer;
end;
var
Future: TPdfFuture<TRenderResult>;
begin
Future := TPdfFuture<TRenderResult>.Create(
function (const ACancelToken: IPdfCancellationToken): TRenderResult
var
LocalPdf: TPdf;
begin
LocalPdf := TPdf.Create(nil);
try
LocalPdf.FileName := 'C:\Huge.pdf';
LocalPdf.Active := True;
LocalPdf.PageNumber := 1;
Result.Bitmap := LocalPdf.RenderPage(0, 0, 2480, 3508);
Result.PageNo := 1;
finally
LocalPdf.Free;
end;
end,
procedure (const AResult: TPdfFutureResult<TRenderResult>)
begin
case AResult.State of
pfsSuccess: PaintBitmapToView(AResult.Value.Bitmap);
pfsCancelled: Log.Add('Cancelled');
pfsFailed: Log.Add('Worker failed: ' + AResult.ErrorMessage);
end;
end);
end;// FPdfMatrix wraps PDFium's FS_MATRIX so callers can build a transform
// declaratively and hand it to FPDFPageObj_SetMatrix.
uses FPdfMatrix, FPdfView;
var
M: TPdfMatrix;
RawMatrix: FS_MATRIX;
PageObj: FPDF_PAGEOBJECT;
begin
M := TPdfMatrix.Create;
try
M.Translate(72, 200); // move 1in right, ~2.8in up
M.Scale(0.5, 0.5); // half-size stamp
M.Rotate(15); // 15-degree CCW rotation
// M.HorizontalFlip;
// M.VerticalFlip;
// M.CentralFlip;
// M.Skew(10, 5);
// M.Multiply(Other); // post-multiply with another matrix
// Apply to any PDFium page object (text / path / image / form XObject)
RawMatrix := M.Handle;
FPDFPageObj_SetMatrix(PageObj, RawMatrix);
finally
M.Free;
end;
end;// ImportPagesByIndex copies an explicit zero-based index array from a
// source PDF into this document. InsertAt = 0 inserts before page 1;
// PageCount appends.
var
Source: TPdf;
begin
Source := TPdf.Create(nil);
try
Source.FileName := 'C:\Report.pdf';
Source.Active := True;
// Import pages 0, 2, 4 (one-based: pages 1, 3, 5) from Source
// and append them at the end of Pdf1.
Pdf1.ImportPagesByIndex(Source, [0, 2, 4], Pdf1.PageCount);
// Empty array imports every source page
// Pdf1.ImportPagesByIndex(Source, [], 0);
finally
Source.Free;
end;
end;// ImportNPagesToOne returns a brand-new TPdf whose pages are NumX*NumY
// composites of THIS document. OutputWidth/Height are PDF user units
// (1 unit = 1/72 in).
var
Composite: TPdf;
begin
Pdf1.FileName := 'C:\Slides.pdf';
Pdf1.Active := True;
// 4-up A4 landscape: 842 x 595 pt, 2 columns x 2 rows
Composite := Pdf1.ImportNPagesToOne(842, 595, 2, 2);
try
if Composite <> nil then
Composite.SaveAs('C:\Slides_4up.pdf');
finally
Composite.Free;
end;
end;// MovePages takes the zero-based indices of the pages to move plus the
// destination index for the first moved page after the move completes.
// Other pages shift around the moved block so the document length stays
// the same.
//
// Example: in a 5-page document with pages numbered [0,1,2,3,4],
// MovePages([2, 3], 0) reorders to [2, 3, 0, 1, 4].
if not Pdf1.MovePages([2, 3], 0) then
ShowMessage('Invalid indices passed to MovePages');// CreateXObjectFromPage manufactures a reusable Form XObject handle from
// any page of any other TPdf. Stamp that handle onto as many pages of
// THIS document as you want — each stamp is a single PDFium page object
// that can be positioned, scaled, and rotated through the matrix API.
uses FPdfMatrix, FPdfView;
var
WatermarkSource: TPdf;
XObj: TPdfXObject;
PageObj: FPDF_PAGEOBJECT;
M: TPdfMatrix;
RawMatrix: FS_MATRIX;
I: Integer;
begin
WatermarkSource := TPdf.Create(nil);
try
WatermarkSource.FileName := 'C:\Watermarks\Confidential.pdf';
WatermarkSource.Active := True;
// Wrap page 0 of WatermarkSource as a reusable XObject
XObj := Pdf1.CreateXObjectFromPage(WatermarkSource, 0);
try
for I := 1 to Pdf1.PageCount do
begin
Pdf1.PageNumber := I;
PageObj := Pdf1.InsertFormObjectFromXObject(XObj);
if PageObj = nil then Continue;
// Centre the watermark on the page
M := TPdfMatrix.Create;
try
M.Scale(0.5, 0.5);
M.Translate(0.25 * Pdf1.PageWidth, 0.5 * Pdf1.PageHeight);
RawMatrix := M.Handle;
FPDFPageObj_SetMatrix(PageObj, RawMatrix);
finally
M.Free;
end;
Pdf1.UpdatePage;
end;
finally
XObj.Free; // closes the FPDF_XOBJECT handle
end;
Pdf1.SaveAs('C:\Watermarked.pdf');
finally
WatermarkSource.Free;
end;
end;The Demo\Delphi\WatermarkStamp, Demo\Lazarus\WatermarkStamp, and Demo\CBuilder\WatermarkStamp projects turn this pattern into a runnable workflow: they create a target PDF and a reusable stamp PDF, wrap the stamp page with CreateXObjectFromPage, insert the same Form XObject on every target page, apply TPdfMatrix transforms for centered watermarks and top-right stamps, and add optional page number labels before saving the result.
// AddImage(FileName) accepts any format registered with the VCL or LCL
// graphics units (BMP, PNG via PngImage, JPG, ...).
Pdf1.AddImage('C:\Photo.png', 100, 500, 200, 150);
// AddImage(TBitmap) skips the TPicture intermediary, ideal when the
// bitmap already comes from rendering or batch generation work.
var
Bitmap: TBitmap;
begin
Bitmap := Pdf1.RenderPage(0, 0, 595, 842);
try
Pdf1.PageNumber := 2;
Pdf1.AddImage(Bitmap, 50, 50, 250, 350);
Pdf1.UpdatePage;
finally
Bitmap.Free;
end;
end;The Demo\Delphi\ImageToPDF, Demo\CBuilder\ImageToPDF, and Demo\Lazarus\ImageToPDF projects turn this into a full batch workflow: select multiple image files, preview the selected item, create one PDF page per image, scale each image into an A4 portrait or landscape page, save the result, and open the generated PDF.
var
MatchCount: Integer;
begin
// Paint a clYellow mask over every match on the view's current page.
// Switching to a different page clears the highlight automatically.
PdfView1.HighlightColor := clYellow;
MatchCount := PdfView1.HighlightSearchText('invoice', False{Case}, True{Word});
Status.Caption := Format('%d match(es) on this page', [MatchCount]);
// Programmatically remove the overlay before the page changes
PdfView1.ClearHighlight;
end;// FitMode keeps long documents framed during Resize or page changes.
// Setting Zoom directly cancels FitMode (it reverts to pfmNone).
PdfView1.FitMode := pfmFitPage; // whole page in viewport
// PdfView1.FitMode := pfmFitWidth; // page width matches viewport width
// PdfView1.FitMode := pfmActualSize; // 100%
// PageColor decouples the rendered PDF page from the host control's Color
// — typical dark-mode viewer setup keeps the scroll area dark while the
// PDF page stays paper-white.
PdfView1.Color := clBlack; // scroll area
PdfView1.PageColor := clWhite; // PDF page background
// Optional drop shadow and page border to lift the page off a dark bg
PdfView1.PageShadowSize := 6;
PdfView1.PageShadowColor := $00404040;
PdfView1.PageBorderColor := clGray;The Demo\Delphi\ViewerInteractionLab, Demo\CBuilder\ViewerInteractionLab, and Demo\Lazarus\ViewerInteractionLab projects keep the modern TPdfView interaction surface in one compact form: open or create a sample PDF, switch DisplayMode, apply FitMode, change PageColor, rotate pages, highlight current-page search hits with HighlightSearchText, enable or disable user text selection, inspect SelectedText, call SelectAll, CopySelectionToClipboard, and ClearSelection, and watch DeviceToPage coordinates update in the status bar while the mouse moves over the page.
The Demo\Delphi\SearchAndSelect, Demo\CBuilder\SearchAndSelect, and Demo\Lazarus\SearchAndSelect projects turn the search-and-selection viewer workflow into standalone samples. They open or create a PDF, list all-page search results with page number, character index, and preview text, support Previous / Next navigation and double-click result jumping, highlight current-page matches with HighlightSearchText, expose match-case and whole-word options, toggle AllowUserTextSelection, preview SelectedText, drive SelectAll, CopySelectionToClipboard, and ClearSelection from buttons, and let users switch between single and spread display modes.
The Demo\Delphi\PrintPreferences, Demo\CBuilder\PrintPreferences, and Demo\Lazarus\PrintPreferences projects read author print preferences before printing. They display PrintCopies, PrintPageRanges, PrintScaling, and PrintPaperHandling, can copy author-provided copies and ranges into the print inputs, and show how SetPdfPrintPaperHandlingDevMode maps PDF duplex intent into a Windows DEVMODE.
The Demo\Delphi\PrintPDF, Demo\CBuilder\PrintPDF, and Demo\Lazarus\PrintPDF projects show the standard print workflow: open a PDF, preview pages, choose page ranges and copies in the platform print dialog, honor collate mode, render each page through TPdf.RenderPage, and expose print progress with cancellation. The Delphi sample also accepts dropped PDF files for quick loading.
The Demo\Delphi\SplitView, Demo\CBuilder\SplitView, and Demo\Lazarus\SplitView projects show side-by-side PDF review. The C++Builder and Lazarus samples focus on two- or three-pane comparison, active-view selection, optional synchronized navigation commands, shared zoom presets, and rotation for the selected view or all loaded views.
The Demo\Delphi\SecurityAudit, Demo\CBuilder\SecurityAudit, and Demo\Lazarus\SecurityAudit projects open a PDF read-only and list permission state, embedded attachments, document JavaScript actions, URI and Launch link annotations, web links, signature summaries, XFA state, V8 helper availability, and unsupported-feature callbacks. The same summary and finding rows can be saved or copied as a TXT audit report or saved as structured JSON. They are intended as host-application risk panels, not as malware detection.
// LinkOptions controls automatic handling of the four PDF link action
// types. Defaults enable goto and URI only; launch (run a program) and
// embedded GotoR (jump to another file) stay OFF so a stray click cannot
// run arbitrary code.
PdfView1.LinkOptions :=
[loAutoGoto, loAutoOpenURI]; // safe defaults
// OnAnnotationLinkClick fires for in-document destinations (page jumps,
// named destinations, action chains). Mark Handled = True to prevent the
// view from auto-following the link.
procedure TForm1.PdfView1AnnotationLinkClick(Sender: TObject;
LinkIndex: Integer; const Action: TPdfAction;
var Handled: Boolean);
begin
if Action.Kind = paUri then
begin
if MessageDlg('Open ' + Action.Uri + '?', mtConfirmation, [mbYes, mbNo], 0)
<> mrYes then
Handled := True; // suppress auto-handling
end;
end;
// OnWebLinkClick fires for URI strings discovered by PDFium's web-link
// scanner (auto-detected URLs in the text stream, even without an
// /A <</S/URI...>> annotation).
procedure TForm1.PdfView1WebLinkClick(Sender: TObject;
WebLinkIndex: Integer; const Url: WString;
var Handled: Boolean);
begin
Log.Add('Web link clicked: ' + string(Url));
end;// On the focused AcroForm widget, six new methods drive PDFium's form
// edit history. All six short-circuit safely if no widget is focused or
// the document carries no AcroForm.
procedure TForm1.btnSelectAllClick(Sender: TObject);
begin
PdfView1.SelectAllFormText;
EditMenuCopy.Caption := 'Copy: ' + string(PdfView1.GetSelectedFormText);
end;
procedure TForm1.btnUndoClick(Sender: TObject);
begin
btnUndo.Enabled := PdfView1.FormCanUndo;
btnRedo.Enabled := PdfView1.FormCanRedo;
if PdfView1.FormCanUndo then
PdfView1.FormUndo;
end;
procedure TForm1.btnRedoClick(Sender: TObject);
begin
if PdfView1.FormCanRedo then
PdfView1.FormRedo;
end;// All three default to True so existing apps upgrade with no behaviour
// change. Flip them False for kiosks, preview panes, or read-only
// embeddings without subclassing TPdfView.
PdfView1.AllowUserPageChange := False; // PgUp/PgDn/Ctrl+Home/End
PdfView1.ChangePageOnMouseScrolling := False; // wheel up/down jumps
PdfView1.AllowUserTextSelection := False; // mouse/keyboard text selection
// Ctrl+wheel is reserved for zoom and is skipped by the navigation
// handler regardless of ChangePageOnMouseScrolling.// TPdfThumbnailView (unit FPdfThumbnail) renders one page thumbnail per
// row in a scrollable side panel.
uses FPdfThumbnail;
procedure TForm1.FormCreate(Sender: TObject);
begin
ThumbView.Pdf := Pdf1;
ThumbView.ThumbnailWidth := 120;
ThumbView.ThumbnailHeight := 160;
ThumbView.SelectionColor := $00CFA85F; // warm highlight
ThumbView.OnPageClick := ThumbViewPageClick;
end;
procedure TForm1.ThumbViewPageClick(Sender: TObject; PageIndex: Integer);
begin
PdfView1.PageNumber := PageIndex + 1; // PageIndex is zero-based
end;
procedure TForm1.PdfView1PageNumberChanged(Sender: TObject);
begin
ThumbView.CurrentPageIndex := PdfView1.PageNumber - 1;
end;// Pattern used by Demo\Delphi\BatchExport, Demo\CBuilder\BatchExport,
// and Demo\Lazarus\BatchExport. One TPdf per file, IPdfCancellationToken
// for cancel-from-UI, TPdfStreamAdapter for buffered file load.
uses FPdfAsync;
procedure ExportBatch(const Files: TArray<string>;
const OutDir: string; DPI: Integer; Quality: Integer;
const ACancelToken: IPdfCancellationToken);
var
I, J: Integer;
Job: TPdf;
Bmp: TBitmap;
Jpeg: TJPEGImage;
begin
for I := 0 to High(Files) do
begin
if ACancelToken.IsCancelled then Break;
OverallProgress.Position := I;
Job := TPdf.Create(nil);
try
Job.FileName := Files[I];
Job.Active := True;
PageProgress.Max := Job.PageCount;
for J := 1 to Job.PageCount do
begin
if ACancelToken.IsCancelled then Break;
PageProgress.Position := J;
Job.PageNumber := J;
Bmp := Job.RenderPage(
0, 0,
Round(Job.PageWidth * DPI / 72),
Round(Job.PageHeight * DPI / 72));
try
Jpeg := TJPEGImage.Create;
try
Jpeg.CompressionQuality := Quality;
Jpeg.Assign(Bmp);
Jpeg.SaveToFile(Format('%s\%s.p%.3d.jpg',
[OutDir, ExtractFileName(Files[I]), J]));
finally
Jpeg.Free;
end;
finally
Bmp.Free;
end;
end;
finally
Job.Free;
end;
end;
end;procedure FitCurrentPage;
begin
PdfView1.Zoom := PdfView1.PageZoom[PdfView1.PageNumber];
end;
procedure InspectViewerPoint(X, Y: Integer);
var
PageNo: Integer;
PageX, PageY: Double;
CharIndex: Integer;
Ch: WString;
begin
PageNo := PdfView1.PageNumber;
if not PdfView1.DeviceToPage(X, Y, PageNo, PageX, PageY) then
Exit;
CharIndex := PdfView1.CharacterIndexAtPos(X, Y, 8, 8);
if CharIndex >= 0 then
begin
Ch := PdfView1.Text(CharIndex, 1);
ShowMessage(Format('Page %d, X %.2f, Y %.2f, character %s',
[PageNo, PageX, PageY, string(Ch)]));
end;
end;function LoadPdfSafely(const FileName: string): Boolean;
begin
Result := False;
if not FileExists(FileName) then
Exit;
try
Pdf1.FileName := FileName;
Pdf1.Active := True;
Result := Pdf1.Active;
except
Result := False;
end;
end;
function ExtractTextSafely(PageNo: Integer): WString;
begin
Result := '';
if not Pdf1.Active then
Exit;
if (PageNo < 1) or (PageNo > Pdf1.PageCount) then
Exit;
Pdf1.PageNumber := PageNo;
Result := Pdf1.Text;
end;// IsTagged is a cheap catalog probe — True when /StructTreeRoot exists.
// StructureElements materialises the tree into a flat array of
// TPdfStructureElement records with type, title, alternate text, actual
// text, expansion text, language, level, parent index, and child / marked
// content / attribute counts.
var
Elements: TPdfStructureElements;
I: Integer;
begin
if not Pdf1.IsTagged then
begin
Log.Add('Document is NOT tagged — accessibility tools may struggle.');
Exit;
end;
if Pdf1.Language = '' then
Log.Add('Tagged PDF without /Lang — fails PDF/UA.');
Elements := Pdf1.StructureElements;
for I := 0 to High(Elements) do
Log.Add(StringOfChar(' ', Elements[I].Level * 2)
+ Elements[I].StructType + ' "' + Elements[I].Title + '"');
end;// SetPdfPrintMode is a global function that maps to PDFium's
// FPDF_SetPrintMode. Use the matching TPdfPrintMode value for the
// printer driver in use.
SetPdfPrintMode(pmEmf); // GDI EMF (default)
// SetPdfPrintMode(pmTextOnly); // text-only rendering
// SetPdfPrintMode(pmPostScript2); // PostScript Level 2
// SetPdfPrintMode(pmPostScript3); // PostScript Level 3
// SetPdfPrintMode(pmPostScript2PassThrough);
// SetPdfPrintMode(pmPostScript3PassThrough);
// SetPdfPrintMode(pmEmfImageMasks); // EMF + image masks
// SetPdfPrintMode(pmPostScript3Type42); // PostScript 3 + Type 42 fonts// PrintCopies, PrintPageRanges, PrintScaling, and PrintPaperHandling are
// the viewer-preference dictionary entries — they encode what the
// document author wanted PDF readers to default to.
var
Ranges: TPrintPageRanges;
Range: TPrintPageRange;
begin
ShowMessage('Suggested copies: ' + IntToStr(Pdf1.PrintCopies));
ShowMessage('Print scaling: ' + GetEnumName(TypeInfo(TPrintScaling),
Ord(Pdf1.PrintScaling)));
Ranges := Pdf1.PrintPageRanges; // one-based ranges
for Range in Ranges do
Log.Add(Format('Pages %d..%d', [Range.First, Range.Last]));
if SetPdfPrintPaperHandlingDevMode(PrinterDevMode, Pdf1.PrintPaperHandling) then
ApplyPrinterDevMode(PrinterDevMode);
end;// Document-level JavaScript is stored in the /Names /JavaScript name
// tree. JavaScriptAction[i] returns one entry; JavaScriptActions returns
// the full array.
var
I: Integer;
Action: TPdfJavaScriptAction;
begin
for I := 0 to Pdf1.JavaScriptActionCount - 1 do
begin
Action := Pdf1.JavaScriptAction[I];
Memo1.Lines.Add('Name: ' + string(Action.Name));
Memo1.Lines.Add('Script: ' + string(Action.Script));
Memo1.Lines.Add('---');
end;
end;procedure ProcessMultiplePages;
var
I: Integer;
PageText: WString;
begin
for I := 1 to Pdf1.PageCount do
begin
Pdf1.PageNumber := I;
PageText := Pdf1.Text;
ProcessPageText(PageText);
end;
end;
procedure SetOptimalRenderOptions;
begin
PdfView1.Options := [reAnnotations, reLcd];
end;
// Zero-copy render path (default since v1.21.0): RenderPage writes
// directly into the destination TBitmap's DIB buffer when callers pass a
// pre-allocated bitmap, avoiding one width * height * 4 bytes copy.
procedure RenderIntoCallerBitmap(Bitmap: TBitmap);
begin
Bitmap.PixelFormat := pf32bit;
Bitmap.SetSize(2480, 3508); // A4 @ 300 DPI
Pdf1.RenderPage(Bitmap, 0, 0, Bitmap.Width, Bitmap.Height);
end;