a12a8a71bb
The goal is to solve confusion of the "All rights reserved" for licensing
code under an open-source license.
The phrase "All rights reserved" comes from a historical convention that
required this phrase for the copyright protection to apply. This convention
is no longer relevant.
However, even though the phrase has no meaning in establishing the copyright
it has not lost meaning in terms of licensing.
This change makes it so code under the Blender Foundation copyright does
not use "all rights reserved". This is also how the GPL license itself
states how to apply it to the source code:
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software ...
This change does not change copyright notice in cases when the copyright
is dual (BF and an author), or just an author of the code. It also does
mot change copyright which is inherited from NaN Holding BV as it needs
some further investigation about what is the proper way to handle it.
100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
|
|
* Copyright 2020 Blender Foundation */
|
|
|
|
/** \file
|
|
* \ingroup depsgraph
|
|
*/
|
|
|
|
#include "intern/builder/deg_builder_remove_noop.h"
|
|
|
|
#include "MEM_guardedalloc.h"
|
|
|
|
#include "intern/node/deg_node.h"
|
|
#include "intern/node/deg_node_operation.h"
|
|
|
|
#include "intern/debug/deg_debug.h"
|
|
#include "intern/depsgraph.h"
|
|
#include "intern/depsgraph_relation.h"
|
|
#include "intern/depsgraph_type.h"
|
|
|
|
namespace blender::deg {
|
|
|
|
static inline bool is_unused_noop(OperationNode *op_node)
|
|
{
|
|
if (op_node == nullptr) {
|
|
return false;
|
|
}
|
|
if (op_node->flag & OperationFlag::DEPSOP_FLAG_PINNED) {
|
|
return false;
|
|
}
|
|
return op_node->is_noop() && op_node->outlinks.is_empty();
|
|
}
|
|
|
|
static inline bool is_removable_relation(const Relation *relation)
|
|
{
|
|
if (relation->from->type != NodeType::OPERATION || relation->to->type != NodeType::OPERATION) {
|
|
return true;
|
|
}
|
|
|
|
const OperationNode *operation_from = static_cast<OperationNode *>(relation->from);
|
|
const OperationNode *operation_to = static_cast<OperationNode *>(relation->to);
|
|
|
|
/* If the relation connects two different IDs there is a high risk that the removal of the
|
|
* relation will make it so visibility flushing is not possible at runtime. This happens with
|
|
* relations like the DoF on camera of custom shape on bones: such relation do not lead to an
|
|
* actual depsgraph evaluation operation as they are handled on render engine level.
|
|
*
|
|
* The indirectly linked objects could have some of their components invisible as well, so
|
|
* also keep relations which connect different components of the same object so that visibility
|
|
* tracking happens correct in those cases as well. */
|
|
return operation_from->owner == operation_to->owner;
|
|
}
|
|
|
|
void deg_graph_remove_unused_noops(Depsgraph *graph)
|
|
{
|
|
deque<OperationNode *> queue;
|
|
|
|
for (OperationNode *node : graph->operations) {
|
|
if (is_unused_noop(node)) {
|
|
queue.push_back(node);
|
|
}
|
|
}
|
|
|
|
Vector<Relation *> relations_to_remove;
|
|
|
|
while (!queue.empty()) {
|
|
OperationNode *to_remove = queue.front();
|
|
queue.pop_front();
|
|
|
|
for (Relation *rel_in : to_remove->inlinks) {
|
|
if (!is_removable_relation(rel_in)) {
|
|
continue;
|
|
}
|
|
|
|
Node *dependency = rel_in->from;
|
|
relations_to_remove.append(rel_in);
|
|
|
|
/* Queue parent no-op node that has now become unused. */
|
|
OperationNode *operation = dependency->get_exit_operation();
|
|
if (is_unused_noop(operation)) {
|
|
queue.push_back(operation);
|
|
}
|
|
}
|
|
|
|
/* TODO(Sybren): Remove the node itself. */
|
|
}
|
|
|
|
/* Remove the relations. */
|
|
for (Relation *relation : relations_to_remove) {
|
|
relation->unlink();
|
|
delete relation;
|
|
}
|
|
|
|
DEG_DEBUG_PRINTF((::Depsgraph *)graph,
|
|
BUILD,
|
|
"Removed %d relations to no-op nodes\n",
|
|
int(relations_to_remove.size()));
|
|
}
|
|
|
|
} // namespace blender::deg
|