Fix T52927: Compositor wrong scale when scale size input is connected to complex node

The issue here is that we can not read scale from socket when determining
dependent area of interest. This area will depend on current pixel. Now fall
back to more stupid but reliable thing: if scale size input is connected to some
nodes, we use the whole frame as area of interest.

1 files changed, 17 insertions, 2 deletions

diff --git a/source/blender/compositor/nodes/COM_ScaleNode.cpp b/source/blender/compositor/nodes/COM_ScaleNode.cpp
index 61eea9227dc..ef4128a78b4 100644
--- a/source/blender/compositor/nodes/COM_ScaleNode.cpp
+++ b/source/blender/compositor/nodes/COM_ScaleNode.cpp
@@ -52,6 +52,9 @@ void ScaleNode::convertToOperations(NodeConverter &converter, const CompositorCo
 			converter.mapInputSocket(inputXSocket, operation->getInputSocket(1));
 			converter.mapInputSocket(inputYSocket, operation->getInputSocket(2));
 			converter.mapOutputSocket(outputSocket, operation->getOutputSocket(0));
+
+			operation->setVariableSize(inputXSocket->isLinked() ||
+			                           inputYSocket->isLinked());
 			break;
 		}
 		case CMP_SCALE_SCENEPERCENT:
@@ -67,6 +70,10 @@ void ScaleNode::convertToOperations(NodeConverter &converter, const CompositorCo
 			converter.addLink(scaleFactorOperation->getOutputSocket(), operation->getInputSocket(1));
 			converter.addLink(scaleFactorOperation->getOutputSocket(), operation->getInputSocket(2));
 			converter.mapOutputSocket(outputSocket, operation->getOutputSocket(0));
+
+			operation->setVariableSize(inputXSocket->isLinked() ||
+			                           inputYSocket->isLinked());
+
 			break;
 		}
 		case CMP_SCALE_RENDERPERCENT:
@@ -81,9 +88,13 @@ void ScaleNode::convertToOperations(NodeConverter &converter, const CompositorCo
 			operation->setNewHeight(rd->ysch * rd->size / 100.0f);
 			operation->getInputSocket(0)->setResizeMode(COM_SC_NO_RESIZE);
 			converter.addOperation(operation);
-			
+
 			converter.mapInputSocket(inputSocket, operation->getInputSocket(0));
 			converter.mapOutputSocket(outputSocket, operation->getOutputSocket(0));
+
+			operation->setVariableSize(inputXSocket->isLinked() ||
+			                           inputYSocket->isLinked());
+
 			break;
 		}
 		case CMP_SCALE_ABSOLUTE:
@@ -91,11 +102,15 @@ void ScaleNode::convertToOperations(NodeConverter &converter, const CompositorCo
 			/* TODO: what is the use of this one.... perhaps some issues when the ui was updated... */
 			ScaleAbsoluteOperation *operation = new ScaleAbsoluteOperation();
 			converter.addOperation(operation);
-			
+
 			converter.mapInputSocket(inputSocket, operation->getInputSocket(0));
 			converter.mapInputSocket(inputXSocket, operation->getInputSocket(1));
 			converter.mapInputSocket(inputYSocket, operation->getInputSocket(2));
 			converter.mapOutputSocket(outputSocket, operation->getOutputSocket(0));
+
+			operation->setVariableSize(inputXSocket->isLinked() ||
+			                           inputYSocket->isLinked());
+
 			break;
 		}
 	}