public Bitmap GetPage(Tile page, bool isPrinting)
{
var imgBuffer = new byte[page.Width * page.Height * 4];
var imgHandle = GCHandle.Alloc(imgBuffer, GCHandleType.Pinned);
try
{
var pagePtr = _nativeXps.Pages[page.PageNum];
if (RenderLibrary.render_page(imgHandle.AddrOfPinnedObject(), pagePtr, (float)page.Scale, page.Width, page.Height) == 0)
{
var bitmap = new Bitmap(page.Width, page.Height, 4 * page.Width,
PixelFormat.Format32bppPArgb,
Marshal.UnsafeAddrOfPinnedArrayElement(imgBuffer, 0));
return(bitmap);
}
else
{
return(null);
}
}
catch (Exception e)
{
return(null);
}
finally
{
imgHandle.Free();
}
}
public void Dispose()
{
if (XpsPtr == IntPtr.Zero)
{
return;
}
foreach (var page in Pages)
{
try
{
RenderLibrary.close_page(XpsPtr, page);
}
catch
{
}
}
Pages = null;
try
{
RenderLibrary.close_xps(XpsPtr);
}
finally
{
XpsPtr = IntPtr.Zero;
}
}
public TilesManager(Stream xpsStream)
{
if (xpsStream == null)
{
return;
}
var errorBuffer = new byte[256];
var errorHandle = GCHandle.Alloc(errorBuffer, GCHandleType.Pinned);
var dataBuffer = StreamToByteArray(xpsStream);
_dataHandle = GCHandle.Alloc(dataBuffer, GCHandleType.Pinned);
try
{
lock (_locker)
{
if (_nativeXps != null)
{
throw new RenderException("Already initialized");
}
var pageCount = 0;
var xpsNativePtr = RenderLibrary.open_xps_with_stream(
_dataHandle.AddrOfPinnedObject(),
dataBuffer.Length,
ref pageCount,
errorHandle.AddrOfPinnedObject(),
errorBuffer.Length);
if (xpsNativePtr == IntPtr.Zero)
{
var nativeError = Encoding.UTF8.GetString(errorBuffer).TrimEnd((char)0);
throw new Exception(nativeError);
}
if (pageCount == 0)
{
throw new Exception("Initialization failed");
}
_nativeXps = new NativeXps(xpsNativePtr, pageCount, _dataHandle);
}
}
catch (RenderException)
{
_dataHandle.Free();
_nativeXps = null;
throw;
}
catch (Exception e)
{
_dataHandle.Free();
_nativeXps = null;
throw new RenderException("Initialization failed");
}
finally
{
errorHandle.Free();
}
}
public void LoadPage(int pageNumber, ref int pageWidth, ref int pageHeight, bool skipText)
{
lock (_locker)
{
try
{
if (_nativeXps == null || _nativeXps.Pages == null || _nativeXps.Pages[pageNumber] != IntPtr.Zero)
{
return;
}
}
catch (Exception e)
{
new RenderException(string.Format("Failed open page %i %s", pageNumber, e.Message));
return;
}
var errorBuffer = new byte[256];
var errorHandle = GCHandle.Alloc(errorBuffer, GCHandleType.Pinned);
try
{
var pagePtr = RenderLibrary.open_xps_page(_nativeXps.XpsPtr, pageNumber, ref pageWidth,
ref pageHeight, errorHandle.AddrOfPinnedObject(), errorBuffer.Length, skipText ? 1 : 0);
if (pagePtr == IntPtr.Zero)
{
var nativeError = Encoding.UTF8.GetString(errorBuffer).TrimEnd((char)0);
new RenderException(string.Format("Failed open page %i %s", pageNumber, nativeError));
}
else
{
_nativeXps.Pages[pageNumber] = pagePtr;
}
}
finally
{
errorHandle.Free();
}
}
}
public byte[] GetPageInBytes(Tile page, bool isPrinting)
{
var imgBuffer = new byte[page.Width * page.Height * 4];
var imgHandle = GCHandle.Alloc(imgBuffer, GCHandleType.Pinned);
try
{
var pagePtr = _nativeXps.Pages[page.PageNum];
if (RenderLibrary.render_page(imgHandle.AddrOfPinnedObject(), pagePtr, (float)page.Scale, page.Width, page.Height) == 0)
{
var bitmap = new Bitmap(page.Width, page.Height, 4 * page.Width,
PixelFormat.Format32bppPArgb,
Marshal.UnsafeAddrOfPinnedArrayElement(imgBuffer, 0));
using (bitmap)
{
using (var ms = new MemoryStream())
{
bitmap.Save(ms, ImageFormat.Png);
imgBuffer = ms.ToArray();
}
return(imgBuffer);
}
}
else
{
return(null);
}
}
catch (Exception e)
{
return(null);
}
finally
{
imgHandle.Free();
}
}
