Fix T41067: Muted nodes still do data type conversions.

Proxy operations from muted nodes would still create conversion
operations where the datatypes don't match, which creates unexpected
behavior. Arguably datatype conversion could still happen even when the
main operation is muted, but this would be a design change and so is
disabled now.

5 files changed, 20 insertions, 11 deletions

diff --git a/source/blender/compositor/intern/COM_NodeConverter.cpp b/source/blender/compositor/intern/COM_NodeConverter.cpp
index 81a10a58cc5..208a3db812f 100644
--- a/source/blender/compositor/intern/COM_NodeConverter.cpp
+++ b/source/blender/compositor/intern/COM_NodeConverter.cpp
@@ -83,9 +83,9 @@ NodeOperation *NodeConverter::setInvalidOutput(NodeOutput *output)
 	return operation;
 }
 
-NodeOperationOutput *NodeConverter::addInputProxy(NodeInput *input)
+NodeOperationOutput *NodeConverter::addInputProxy(NodeInput *input, bool use_conversion)
 {
-	SocketProxyOperation *proxy = new SocketProxyOperation(input->getDataType());
+	SocketProxyOperation *proxy = new SocketProxyOperation(input->getDataType(), use_conversion);
 	m_builder->addOperation(proxy);
 	
 	m_builder->mapInputSocket(input, proxy->getInputSocket(0));
@@ -93,9 +93,9 @@ NodeOperationOutput *NodeConverter::addInputProxy(NodeInput *input)
 	return proxy->getOutputSocket();
 }
 
-NodeOperationInput *NodeConverter::addOutputProxy(NodeOutput *output)
+NodeOperationInput *NodeConverter::addOutputProxy(NodeOutput *output, bool use_conversion)
 {
-	SocketProxyOperation *proxy = new SocketProxyOperation(output->getDataType());
+	SocketProxyOperation *proxy = new SocketProxyOperation(output->getDataType(), use_conversion);
 	m_builder->addOperation(proxy);
 	
 	m_builder->mapOutputSocket(output, proxy->getOutputSocket());
diff --git a/source/blender/compositor/intern/COM_NodeConverter.h b/source/blender/compositor/intern/COM_NodeConverter.h
index e5e7629f39a..414b4f1ee95 100644
--- a/source/blender/compositor/intern/COM_NodeConverter.h
+++ b/source/blender/compositor/intern/COM_NodeConverter.h
@@ -70,12 +70,12 @@ public:
 	 *  This operation will be removed later and replaced
 	 *  by direct links between the connected operations.
 	 */
-	NodeOperationOutput *addInputProxy(NodeInput *input);
+	NodeOperationOutput *addInputProxy(NodeInput *input, bool use_conversion);
 	/** Create a proxy operation for a node output.
 	 *  This operation will be removed later and replaced
 	 *  by direct links between the connected operations.
 	 */
-	NodeOperationInput *addOutputProxy(NodeOutput *output);
+	NodeOperationInput *addOutputProxy(NodeOutput *output, bool use_conversion);
 	
 	/** Define a constant input value. */
 	void addInputValue(NodeOperationInput *input, float value);
diff --git a/source/blender/compositor/intern/COM_NodeGraph.cpp b/source/blender/compositor/intern/COM_NodeGraph.cpp
index cbe47238249..2dcf419d81b 100644
--- a/source/blender/compositor/intern/COM_NodeGraph.cpp
+++ b/source/blender/compositor/intern/COM_NodeGraph.cpp
@@ -202,7 +202,7 @@ void NodeGraph::add_bNodeLink(const NodeRange &node_range, bNodeLink *b_nodelink
 void NodeGraph::add_proxies_mute(bNodeTree *b_ntree, bNode *b_node, bNodeInstanceKey key, bool is_active_group)
 {
 	for (bNodeLink *b_link = (bNodeLink *)b_node->internal_links.first; b_link; b_link = b_link->next) {
-		SocketProxyNode *proxy = new SocketProxyNode(b_node, b_link->fromsock, b_link->tosock);
+		SocketProxyNode *proxy = new SocketProxyNode(b_node, b_link->fromsock, b_link->tosock, false);
 		add_node(proxy, b_ntree, key, is_active_group);
 	}
 }
@@ -219,7 +219,7 @@ void NodeGraph::add_proxies_skip(bNodeTree *b_ntree, bNode *b_node, bNodeInstanc
 		}
 		
 		if (input) {
-			SocketProxyNode *proxy = new SocketProxyNode(b_node, input, output);
+			SocketProxyNode *proxy = new SocketProxyNode(b_node, input, output, true);
 			add_node(proxy, b_ntree, key, is_active_group);
 		}
 	}
@@ -237,7 +237,7 @@ void NodeGraph::add_proxies_group_inputs(bNode *b_node, bNode *b_node_io)
 	for (bNodeSocket *b_sock_io = (bNodeSocket *)b_node_io->outputs.first; b_sock_io; b_sock_io = b_sock_io->next) {
 		bNodeSocket *b_sock_group = find_b_node_input(b_node, b_sock_io->identifier);
 		if (b_sock_group) {
-			SocketProxyNode *proxy = new SocketProxyNode(b_node_io, b_sock_group, b_sock_io);
+			SocketProxyNode *proxy = new SocketProxyNode(b_node_io, b_sock_group, b_sock_io, true);
 			add_node(proxy, b_group_tree, key, is_active_group);
 		}
 	}
@@ -260,7 +260,7 @@ void NodeGraph::add_proxies_group_outputs(bNode *b_node, bNode *b_node_io, bool
 				add_node(buffer, b_group_tree, key, is_active_group);
 			}
 			else {
-				SocketProxyNode *proxy = new SocketProxyNode(b_node_io, b_sock_io, b_sock_group);
+				SocketProxyNode *proxy = new SocketProxyNode(b_node_io, b_sock_io, b_sock_group, true);
 				add_node(proxy, b_group_tree, key, is_active_group);
 			}
 		}
@@ -294,6 +294,6 @@ void NodeGraph::add_proxies_group(const CompositorContext &context, bNode *b_nod
 
 void NodeGraph::add_proxies_reroute(bNodeTree *b_ntree, bNode *b_node, bNodeInstanceKey key, bool is_active_group)
 {
-	SocketProxyNode *proxy = new SocketProxyNode(b_node, (bNodeSocket *)b_node->inputs.first, (bNodeSocket *)b_node->outputs.first);
+	SocketProxyNode *proxy = new SocketProxyNode(b_node, (bNodeSocket *)b_node->inputs.first, (bNodeSocket *)b_node->outputs.first, false);
 	add_node(proxy, b_ntree, key, is_active_group);
 }
diff --git a/source/blender/compositor/intern/COM_NodeOperation.h b/source/blender/compositor/intern/COM_NodeOperation.h
index 3f636dff63c..b2b8f03c476 100644
--- a/source/blender/compositor/intern/COM_NodeOperation.h
+++ b/source/blender/compositor/intern/COM_NodeOperation.h
@@ -288,6 +288,8 @@ public:
 	virtual bool isFileOutputOperation() const { return false; }
 	virtual bool isProxyOperation() const { return false; }
 	
+	virtual bool useDatatypeConversion() const { return true; }
+	
 	inline bool isBreaked() const {
 		return this->m_btree->test_break(this->m_btree->tbh);
 	}
diff --git a/source/blender/compositor/intern/COM_NodeOperationBuilder.cpp b/source/blender/compositor/intern/COM_NodeOperationBuilder.cpp
index 6554926991c..0c8c3ed53a7 100644
--- a/source/blender/compositor/intern/COM_NodeOperationBuilder.cpp
+++ b/source/blender/compositor/intern/COM_NodeOperationBuilder.cpp
@@ -269,6 +269,13 @@ void NodeOperationBuilder::add_datatype_conversions()
 	Links convert_links;
 	for (Links::const_iterator it = m_links.begin(); it != m_links.end(); ++it) {
 		const Link &link = *it;
+		
+		/* proxy operations can skip data type conversion */
+		NodeOperation *from_op = &link.from()->getOperation();
+		NodeOperation *to_op = &link.to()->getOperation();
+		if (!from_op->useDatatypeConversion() || !to_op->useDatatypeConversion())
+			continue;
+		
 		if (link.from()->getDataType() != link.to()->getDataType())
 			convert_links.push_back(link);
 	}