DARenderPageToString
Direct access functionality, Rendering and printing
Description
It renders the specified page from the specified document to an image and returns the image data as a string.
By default rendering uses the GDI+ system which is available in Windows XP and later.
Option 10, TIFF (G4) output, is only available on Windows Vista and Windows Server 2008 and later.
It is also possible to render using Cairo, use the SetCairoFileName and SelectRenderer
functions.
Syntax
Delphi
function TPDFlib.DARenderPageToString(FileHandle, PageRef, Options: Integer; DPI: Double): AnsiString;ActiveX
Function PDFlib::DARenderPageToString(FileHandle As Long, PageRef As Long, Options As Long, DPI As Double) As StringDLL
char * DLDARenderPageToString(int InstanceID, int FileHandle, int PageRef, int Options, double DPI);Parameters
| FileHandle | A handle returned by the DAOpenFile, DAOpenFileReadOnly or DAOpenFromStream functions |
|---|---|
| PageRef | A page reference returned by the DAFindPage or DANewPage functions |
| Options | 0 = BMP output 1 = JPEG output 2 = WMF output 3 = EMF output 4 = EPS output 5 = PNG output 6 = GIF output 7 = TIFF output 8 = EMF+ output 9 = HTML5 output 10 = G4 TIFF output |
| DPI | The DPI to use when rendering the page. Values over 300 will cause excessive memory usage. |