Corner pin (#1851)

* Start adding a corner pin node

* Start gizmo support

* Correctly setup QVector2d inputs

* Missing breaks were causing incorect data to be set

* Add ability to override vertex coords

* Get perspective pin working

* Cleanup

* Add none perspective corner pin

* Small optimisation

* Improve comments, clean up and fix bug in job optimisation

* [skip ci] cornerpin: Improve description

* Move GL extension from shader to standard preamble.

* Use #version 130 for mobile GPU compatibility

* Cache half resolution

* Use built in NodeInputDragger::GetStartValue

* Pass cnst references to avoid deep copies

Co-authored-by: itsmattkc <itsmattkc@gmail.com>

app/node/factory.cpp

@@ -29,6 +29,7 @@
 #include "block/subtitle/subtitle.h"
 #include "block/transition/crossdissolve/crossdissolvetransition.h"
 #include "block/transition/diptocolor/diptocolortransition.h"
+#include "distort/cornerpin/cornerpindistortnode.h"
 #include "distort/crop/cropdistortnode.h"
 #include "distort/flip/flipdistortnode.h"
 #include "distort/transform/transformdistortnode.h"
@@ -264,6 +265,8 @@ Node *NodeFactory::CreateFromFactoryIndex(const NodeFactory::InternalID &id)
     return new NoiseGeneratorNode();
   case kTimeOffsetNode:
     return new TimeOffsetNode();
+  case kCornerPinDistort:
+    return new CornerPinDistortNode();
 
   case kInternalNodeCount:
     break;