internal static async Task <PdfPage> Create(
ThreadDispatcher dispatcher,
FpdfDocumentT documentInstance,
int pageIndex)
{
var loadPageResult = await dispatcher.QueueWithResult(() => fpdfview.FPDF_LoadPage(documentInstance, pageIndex));
if (loadPageResult == null)
{
throw new Exception($"Failed to open page for page index {pageIndex}.");
}
var page = new PdfPage(dispatcher, documentInstance, loadPageResult)
{
InitialIndex = pageIndex
};
var getPageSizeResult = await dispatcher.QueueWithResult(() =>
{
var size = new FS_SIZEF_();
var result = fpdfview.FPDF_GetPageSizeByIndexF(documentInstance, pageIndex, size);
return(result == 0 ? null : size);
});
if (getPageSizeResult == null)
{
throw new Exception($"Could not retrieve page size for page index {pageIndex}.");
}
page.Size = new SizeF(getPageSizeResult.Width, getPageSizeResult.Height);
return(page);
}
public DocumentWrapper(FpdfDocumentT instance)
{
Instance = instance;
if (Instance == null)
{
throw new DocnetException("unable to open the document");
}
}
public DocumentWrapper(string filePath, string password)
{
Instance = fpdf_view.FPDF_LoadDocument(filePath, password);
if (Instance == null)
{
throw new DocnetException("unable to open the document");
}
}
public void Dispose()
{
if (Instance == null)
{
return;
}
fpdf_view.FPDF_CloseDocument(Instance);
Instance = null;
}
public void Dispose()
{
if (Instance == null)
{
return;
}
fpdf_view.FPDF_CloseDocument(Instance);
Marshal.FreeHGlobal(_ptr);
Instance = null;
}
public DocumentWrapper(byte[] bytes, string password)
{
_ptr = Marshal.AllocHGlobal(bytes.Length);
Marshal.Copy(bytes, 0, _ptr, bytes.Length);
Instance = fpdf_view.FPDF_LoadMemDocument(_ptr, bytes.Length, password);
if (Instance == null)
{
throw new DocnetLoadDocumentException("unable to open the document", fpdf_view.FPDF_GetLastError());
}
}
public static bool FPDF_SaveAsCopy(FpdfDocumentT document, Stream stream)
{
byte[] buffer = null;
var fileWrite = new FpdfStreamWriter((writerPtr, data, size) =>
{
if (buffer == null || buffer.Length < size)
{
buffer = new byte[size];
}
Marshal.Copy(data, buffer, 0, size);
stream.Write(buffer, 0, size);
return(true);
});
var result = FPDF_SaveAsCopy(document.__Instance, fileWrite, 3);
GC.KeepAlive(fileWrite);
return(result == 1);
}
private PdfDocument(PDFiumCoreManager manager, FpdfDocumentT documentInstance)
{
_manager = manager;
_documentInstance = documentInstance;
}
private PdfPage(ThreadDispatcher dispatcher, FpdfDocumentT documentInstance, FpdfPageT pageInstance)
{
_dispatcher = dispatcher;
_documentInstance = documentInstance;
_pageInstance = pageInstance;
}
