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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "BLI_stack.hh"
#include "NOD_node_tree_multi_function_procedure.hh"
#include "NOD_type_callbacks.hh"
namespace blender::nodes {
class NodeTreeProcedureBuilder {
private:
const DerivedNodeTree &tree_;
const Span<DSocket> tree_outputs_;
std::unique_ptr<MFProcedure> procedure_;
Map<DSocket, MFVariable *> variable_by_socket_;
friend NodeMFProcedureBuilder;
public:
NodeTreeProcedureBuilder(const DerivedNodeTree &tree, const Span<DSocket> tree_outputs)
: tree_(tree), tree_outputs_(tree_outputs)
{
procedure_ = std::make_unique<MFProcedure>();
}
MFProcedureFromNodes build()
{
Stack<DSocket> sockets_to_compute;
sockets_to_compute.push_multiple(tree_outputs_);
while (!sockets_to_compute.is_empty()) {
const DSocket socket_to_compute = sockets_to_compute.peek();
if (variable_by_socket_.contains(socket_to_compute)) {
sockets_to_compute.pop();
continue;
}
const DNode node = socket_to_compute.node();
bNodeType *node_type = node->typeinfo();
if (false /* Handle undefined/unsupported nodes. */) {
}
if (socket_to_compute->is_input()) {
const DInputSocket input_socket{socket_to_compute};
Vector<DSocket> origin_sockets;
input_socket.foreach_origin_socket(
[&](const DSocket socket) { origin_sockets.append(socket); });
if (origin_sockets.is_empty()) {
/* Load from socket. */
}
else if (origin_sockets.size() == 1) {
/* Compute origin. */
}
else {
/* Handle error. */
}
}
else {
const DOutputSocket output_socket{socket_to_compute};
bool all_inputs_computed = true;
for (const int i : node->inputs().index_range()) {
const DInputSocket node_input = node.input(i);
if (node_input->is_available()) {
if (!variable_by_socket_.contains(node_input)) {
sockets_to_compute.push(node_input);
all_inputs_computed = false;
}
}
}
if (!all_inputs_computed) {
continue;
}
NodeMFProcedureBuilder node_builder{node, *this};
node_type->build_mf_procedure(node_builder);
}
}
return {std::move(procedure_), {}};
}
};
MFVariable &NodeMFProcedureBuilder::get_input(StringRef identifer)
{
const DInputSocket socket = node_.input_by_identifier(identifer);
const CPPType &cpp_type = *socket_cpp_type_get(*socket->typeinfo());
const MFDataType data_type = MFDataType::ForSingle(cpp_type);
return *procedure_builder_.variable_by_socket_.lookup_or_add_cb(socket, [&]() {
return &this->procedure_builder_.procedure_->new_variable(data_type, socket->name());
});
}
void NodeMFProcedureBuilder::set_output(StringRef identifier, MFVariable &variable)
{
const DOutputSocket socket = node_.output_by_identifier(identifier);
procedure_builder_.variable_by_socket_.add_new(socket, &variable);
}
void NodeMFProcedureBuilder::set_input_instruction(MFInstruction &instruction)
{
input_instruction_ = &instruction;
}
void NodeMFProcedureBuilder::set_output_instruction(MFInstruction &instruction)
{
output_instruction_ = &instruction;
}
void NodeMFProcedureBuilder::set_matching_fn(const MultiFunction &fn)
{
MFCallInstruction &instruction = procedure_builder_.procedure_->new_call_instruction(fn);
Vector<MFVariable *> variables;
for (const int i : node_->inputs().index_range()) {
const DInputSocket socket = node_.input(i);
if (socket->is_available()) {
const int param_index = variables.size();
const MFParamType param_type = fn.param_type(param_index);
const StringRef name = fn.param_name(param_index);
MFVariable &input_variable = procedure_builder_.procedure_->new_variable(
param_type.data_type(), name);
procedure_builder_.variable_by_socket_.add_new(socket, &input_variable);
variables.append(&input_variable);
}
}
for (const int i : node_->outputs().index_range()) {
const DOutputSocket socket = node_.output(i);
if (socket->is_available()) {
const int param_index = variables.size();
const MFParamType param_type = fn.param_type(param_index);
const StringRef name = fn.param_name(param_index);
MFVariable &output_variable = procedure_builder_.procedure_->new_variable(
param_type.data_type(), name);
procedure_builder_.variable_by_socket_.add_new(socket, &output_variable);
variables.append(&output_variable);
}
}
instruction.set_params(variables);
this->set_input_instruction(instruction);
this->set_output_instruction(instruction);
}
MFProcedureFromNodes create_multi_function_procedure(const DerivedNodeTree &tree,
const Span<DSocket> tree_outputs)
{
NodeTreeProcedureBuilder builder{tree, tree_outputs};
return builder.build();
}
} // namespace blender::nodes
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