private unsafe short SetHandleSize(IntPtr h, int newSize)
{
#if DEBUG
DebugUtils.Ping(DebugFlags.HandleSuite, string.Format("Handle: 0x{0}", h.ToHexString()));
#endif
if (newSize < 0)
{
return(PSError.paramErr);
}
if (AllocatedBySuite(h))
{
try
{
PSHandle *handle = (PSHandle *)h.ToPointer();
IntPtr ptr = Memory.ReAlloc(handle->pointer, newSize);
handle->pointer = ptr;
handles.AddOrUpdate(h, new HandleEntry(h, ptr, newSize));
}
catch (OutOfMemoryException)
{
return(PSError.memFullErr);
}
}
else
{
if (SafeNativeMethods.GlobalSize(h).ToInt64() > 0L)
{
IntPtr hPtr = Marshal.ReadIntPtr(h);
if (IsValidReadPtr(hPtr) && SafeNativeMethods.GlobalSize(hPtr).ToInt64() > 0L)
{
IntPtr hMem = SafeNativeMethods.GlobalReAlloc(hPtr, new UIntPtr((uint)newSize), NativeConstants.GPTR);
if (hMem == IntPtr.Zero)
{
return(PSError.memFullErr);
}
Marshal.WriteIntPtr(h, hMem);
}
else
{
if (SafeNativeMethods.GlobalReAlloc(h, new UIntPtr((uint)newSize), NativeConstants.GPTR) == IntPtr.Zero)
{
return(PSError.memFullErr);
}
}
}
else
{
return(PSError.nilHandleErr);
}
}
return(PSError.noErr);
}
internal unsafe IntPtr NewHandle(int size)
{
if (size < 0)
{
return(IntPtr.Zero);
}
IntPtr handle = IntPtr.Zero;
try
{
// The Photoshop API 'Handle' is an indirect pointer.
// As some plug-ins may dereference the pointer instead of calling HandleLockProc we recreate that implementation.
handle = Memory.Allocate(PSHandle.SizeOf, true);
PSHandle *hand = (PSHandle *)handle.ToPointer();
hand->pointer = Memory.Allocate(size, true);
handles.Add(handle, new HandleEntry(handle, hand->pointer, size));
#if DEBUG
string message = string.Format("Handle: 0x{0}, pointer: 0x{1}, size: {2}", handle.ToHexString(), hand->pointer.ToHexString(), size);
DebugUtils.Ping(DebugFlags.HandleSuite, message);
#endif
}
catch (OutOfMemoryException)
{
if (handle != IntPtr.Zero)
{
// Free the handle pointer memory if it has been allocated.
// This would occur if the framework throws an OutOfMemoryException when adding to the handles dictionary.
PSHandle *hand = (PSHandle *)handle.ToPointer();
if (hand->pointer != IntPtr.Zero)
{
Memory.Free(hand->pointer);
hand->pointer = IntPtr.Zero;
}
Memory.Free(handle);
handle = IntPtr.Zero;
}
return(IntPtr.Zero);
}
return(handle);
}