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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "BLI_dot_export.hh"
#include "FN_lazy_function_graph.hh"
namespace blender::fn::lazy_function {
Graph::~Graph()
{
for (Node *node : nodes_) {
for (InputSocket *socket : node->inputs_) {
std::destroy_at(socket);
}
for (OutputSocket *socket : node->outputs_) {
std::destroy_at(socket);
}
std::destroy_at(node);
}
}
FunctionNode &Graph::add_function(const LazyFunction &fn)
{
const Span<Input> inputs = fn.inputs();
const Span<Output> outputs = fn.outputs();
FunctionNode &node = *allocator_.construct<FunctionNode>().release();
node.fn_ = &fn;
node.inputs_ = allocator_.construct_elements_and_pointer_array<InputSocket>(inputs.size());
node.outputs_ = allocator_.construct_elements_and_pointer_array<OutputSocket>(outputs.size());
for (const int i : inputs.index_range()) {
InputSocket &socket = *node.inputs_[i];
socket.index_in_node_ = i;
socket.is_input_ = true;
socket.node_ = &node;
socket.type_ = inputs[i].type;
}
for (const int i : outputs.index_range()) {
OutputSocket &socket = *node.outputs_[i];
socket.index_in_node_ = i;
socket.is_input_ = false;
socket.node_ = &node;
socket.type_ = outputs[i].type;
}
nodes_.append(&node);
return node;
}
DummyNode &Graph::add_dummy(Span<const CPPType *> input_types, Span<const CPPType *> output_types)
{
DummyNode &node = *allocator_.construct<DummyNode>().release();
node.fn_ = nullptr;
node.inputs_ = allocator_.construct_elements_and_pointer_array<InputSocket>(input_types.size());
node.outputs_ = allocator_.construct_elements_and_pointer_array<OutputSocket>(
output_types.size());
for (const int i : input_types.index_range()) {
InputSocket &socket = *node.inputs_[i];
socket.index_in_node_ = i;
socket.is_input_ = true;
socket.node_ = &node;
socket.type_ = input_types[i];
}
for (const int i : output_types.index_range()) {
OutputSocket &socket = *node.outputs_[i];
socket.index_in_node_ = i;
socket.is_input_ = false;
socket.node_ = &node;
socket.type_ = output_types[i];
}
nodes_.append(&node);
return node;
}
void Graph::add_link(OutputSocket &from, InputSocket &to)
{
BLI_assert(to.origin_ == nullptr);
BLI_assert(from.type_ == to.type_);
to.origin_ = &from;
from.targets_.append(&to);
}
void Graph::update_node_indices()
{
for (const int i : nodes_.index_range()) {
nodes_[i]->index_in_graph_ = i;
}
}
bool Graph::node_indices_are_valid() const
{
for (const int i : nodes_.index_range()) {
if (nodes_[i]->index_in_graph_ != i) {
return false;
}
}
return true;
}
std::string Socket::name() const
{
if (node_->is_function()) {
const FunctionNode &fn_node = static_cast<const FunctionNode &>(*node_);
const LazyFunction &fn = fn_node.function();
if (is_input_) {
return fn.input_name(index_in_node_);
}
return fn.output_name(index_in_node_);
}
return "Unnamed";
}
std::string Node::name() const
{
if (fn_ == nullptr) {
return static_cast<const DummyNode *>(this)->name_;
}
return fn_->name();
}
std::string Graph::to_dot() const
{
dot::DirectedGraph digraph;
digraph.set_rankdir(dot::Attr_rankdir::LeftToRight);
Map<const Node *, dot::NodeWithSocketsRef> dot_nodes;
for (const Node *node : nodes_) {
dot::Node &dot_node = digraph.new_node("");
if (node->is_dummy()) {
dot_node.set_background_color("lightblue");
}
else {
dot_node.set_background_color("white");
}
Vector<std::string> input_names;
Vector<std::string> output_names;
for (const InputSocket *socket : node->inputs()) {
input_names.append(socket->name());
}
for (const OutputSocket *socket : node->outputs()) {
output_names.append(socket->name());
}
dot_nodes.add_new(node,
dot::NodeWithSocketsRef(dot_node, node->name(), input_names, output_names));
}
for (const Node *node : nodes_) {
for (const InputSocket *socket : node->inputs()) {
const dot::NodeWithSocketsRef &to_dot_node = dot_nodes.lookup(&socket->node());
const dot::NodePort to_dot_port = to_dot_node.input(socket->index());
if (const OutputSocket *origin = socket->origin()) {
dot::NodeWithSocketsRef &from_dot_node = dot_nodes.lookup(&origin->node());
digraph.new_edge(from_dot_node.output(origin->index()), to_dot_port);
}
else if (const void *default_value = socket->default_value()) {
const CPPType &type = socket->type();
std::string value_string;
if (type.is_printable()) {
value_string = type.to_string(default_value);
}
else {
value_string = "<" + type.name() + ">";
}
dot::Node &default_value_dot_node = digraph.new_node(value_string);
default_value_dot_node.set_shape(dot::Attr_shape::Ellipse);
digraph.new_edge(default_value_dot_node, to_dot_port);
}
}
}
return digraph.to_dot_string();
}
} // namespace blender::fn::lazy_function
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