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GetPage

GetPage

Owned by Andy Erd
Mar 31, 2022

Declaration

Delphi

function GetPage(PageNr , DPI:Integer):HBITMAP;

ActiveX

HRESULT _stdcall GetPage([in] long PagteNr, [in] long DPI, [out, retval] OLE_HANDLE * RetVal );

Arguments

ArgumentDescription
PageNumber of the page which should be rendered
DPIDPI value of the page image

Return value

HBITMAP Handle to Windows Bitmap.

Description

This function returns a image of a PDF page in the desired DPI.

Sample 

C# - getPage
// GetPage returns a Bitmap from a Page of the loaded document. Input Parameters are the Pagenumber and the DPI Size

Bitmap bmp = Image.FromHbitmap((IntPtr)SignAPI.GetPage(pagenumber, 125)); 

panel.AutoScroll = true;
pictureBox.SizeMode = PictureBoxSizeMode.AutoSize;
pictureBox.Image = bmp;
Delphi
procedure TForm1.ButtonGetPageClick(Sender: TObject);
var
    bmphandle:HBITMAP;
    bmp:TBitmap;

begin
	// Get first Page in 150dpi 
    bmphandle := SignApi.GetPage(1,150);

    if bmphandle <> 0 then
    begin
        bmp := TBitmap.Create;
        bmp.PixelFormat := pf32bit;
        bmp.Handle := bmphandle;
        bmp.SaveToFile('C:\Temp\page' + Trim(PageNumEdit.Text) + '_dpi' + Trim(EditDPI.text) + '.bmp' );
        bmp.Free;
    end;
end;




 

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