TPdfObject.SetImage

Declaration

function SetImage(Bitmap: TIEBitmap): Boolean; overload;
function SetImage(Stream: TStream): Boolean; overload;
function SetImage(const JpegFilename: string): Boolean; overload;
function SetImage(Bitmap: TBitmap): Boolean; overload;

Description

Replaces the bitmap of an image object in the current page (when ObjectType is ptImage).

Note:
◼To save in JPEG format, set PDF_Compression to ioPDF_JPEG and specify a value for JPEG_Quality
◼Use GetImage to get the image of an object
◼You must call ImageEnView1.PdfViewer.ReloadPage() after changing page images

Example

// Replace all the images in the page
bmp := TIEBitmap.Create();
try
  bmp.LoadFromFile( 'D:\MyLogo.jpg' );
  for i := 0 to ImageEnView1.PdfViewer.Objects.Count - 1 do
    if ImageEnView1.PdfViewer.Objects[i].ObjectType = ptImage then
    begin
      if ImageEnView1.PdfViewer.Objects[i].SetImage( bmp ) = False then
        BREAK;
    end;
finally
  bmp.Free;
  ImageEnView1.PdfViewer.ReloadPage();
end;

// Reduce the size of the PDF file by lowering the quality of the images and enabling JPEG compression
ImageEnView1.IOParams.PDF_Compression := ioPDF_JPEG;
ImageEnView1.IOParams.JPEG_Quality    := 75;
for i := 0 to ImageEnView1.PdfViewer.Objects.Count - 1 do
begin
  oPDF := ImageEnView1.PdfViewer.Objects[i];
  if oPDF.ObjectType = ptImage then
  begin
    B := TIEBitmap.Create();
    try
      if oPDF.GetImage( B ) then
      begin
        B.Resample( 0.5 );
        oPDF.SetImage(B);
       end;
    finally
      B.Free;
    end;
  end;
end;
ImageEnView1.PdfViewer.ReloadPage();

// Same as above but B is a TBitmap (must add iexHelperFunctions to your uses clause for TBitmap.Proc)
ImageEnView1.IOParams.PDF_Compression := ioPDF_JPEG;
ImageEnView1.IOParams.JPEG_Quality    := 75;
for i := 0 to ImageEnView1.PdfViewer.Objects.Count - 1 do
begin
  oPDF := ImageEnView1.PdfViewer.Objects[i];
  if oPDF.ObjectType = ptImage then
  begin
    B := oPDF.GetImage();
    if B <> nil then
    try
      B.Proc.Resample( 0.5 );
      oPDF.SetImage(B);
    finally
      B.Free;
    end;
  end;
end;
ImageEnView1.PdfViewer.ReloadPage();

TPdfObject.SetImage