/// <summary>
/// The ID2D1Factory interface provides the starting point for Direct2D.
/// In general, an object created from a single instance of a factory object can be used with other resources created from that instance,
/// but not with resources created by other factory instances.
/// </summary>
/// <returns></returns>
public static bool CreateD2DFactory(ID2D1Factory factory)
{
factory = null;
object ppIFactory = null;
int rc = Win32Error.S_OK;
IntPtr ptrIID = IntPtr.Zero;
GUID iid;
if ((rc = OLE.IIDFromString(D2DInterfaceID.ID2D1Factory, out iid)) != Win32Error.S_OK)
{
logger.ErrorFormat("获取ID2D1Factory IID失败, guid = {0}, code = {1}", D2DInterfaceID.ID2D1Factory, rc);
return(false);
}
try
{
ptrIID = Marshal.AllocHGlobal(Marshal.SizeOf(iid));
Marshal.StructureToPtr(iid, ptrIID, true);
if ((rc = D2D1.D2D1CreateFactory(D2D1_FACTORY_TYPE.D2D1_FACTORY_TYPE_SINGLE_THREADED, ptrIID, IntPtr.Zero, out ppIFactory)) != Win32Error.S_OK)
{
logger.ErrorFormat("D2D1CreateFactory失败, code = {0}", rc);
return(false);
}
}
catch (Exception ex)
{
logger.Error("创建D2DFactory异常", ex);
return(false);
}
finally
{
if (ptrIID != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptrIID);
}
}
factory = ppIFactory as ID2D1Factory;
return(true);
}
