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();
}
}
