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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <string>
#include "DNA_node_types.h"
#include "NOD_derived_node_tree.hh"
#include "COM_compile_state.hh"
#include "COM_context.hh"
#include "COM_evaluator.hh"
#include "COM_input_single_value_operation.hh"
#include "COM_node_operation.hh"
#include "COM_operation.hh"
#include "COM_result.hh"
#include "COM_scheduler.hh"
#include "COM_shader_operation.hh"
#include "COM_utilities.hh"
namespace blender::realtime_compositor {
using namespace nodes::derived_node_tree_types;
Evaluator::Evaluator(Context &context, bNodeTree &node_tree)
: context_(context), node_tree_(node_tree)
{
}
void Evaluator::evaluate()
{
context_.cache_manager().reset();
context_.texture_pool().reset();
if (!is_compiled_) {
compile_and_evaluate();
is_compiled_ = true;
return;
}
for (const std::unique_ptr<Operation> &operation : operations_stream_) {
operation->evaluate();
}
}
void Evaluator::reset()
{
operations_stream_.clear();
derived_node_tree_.reset();
is_compiled_ = false;
}
bool Evaluator::validate_node_tree()
{
if (derived_node_tree_->has_link_cycles()) {
context_.set_info_message("Compositor node tree has cyclic links!");
return false;
}
if (derived_node_tree_->has_undefined_nodes_or_sockets()) {
context_.set_info_message("Compositor node tree has undefined nodes or sockets!");
return false;
}
return true;
}
void Evaluator::compile_and_evaluate()
{
derived_node_tree_ = std::make_unique<DerivedNodeTree>(node_tree_);
if (!validate_node_tree()) {
return;
}
const Schedule schedule = compute_schedule(*derived_node_tree_);
CompileState compile_state(schedule);
for (const DNode &node : schedule) {
if (compile_state.should_compile_shader_compile_unit(node)) {
compile_and_evaluate_shader_compile_unit(compile_state);
}
if (is_shader_node(node)) {
compile_state.add_node_to_shader_compile_unit(node);
}
else {
compile_and_evaluate_node(node, compile_state);
}
}
}
void Evaluator::compile_and_evaluate_node(DNode node, CompileState &compile_state)
{
NodeOperation *operation = node->typeinfo->get_compositor_operation(context_, node);
compile_state.map_node_to_node_operation(node, operation);
map_node_operation_inputs_to_their_results(node, operation, compile_state);
/* This has to be done after input mapping because the method may add Input Single Value
* Operations to the operations stream, which needs to be evaluated before the operation itself
* is evaluated. */
operations_stream_.append(std::unique_ptr<Operation>(operation));
operation->compute_results_reference_counts(compile_state.get_schedule());
operation->evaluate();
}
void Evaluator::map_node_operation_inputs_to_their_results(DNode node,
NodeOperation *operation,
CompileState &compile_state)
{
for (const bNodeSocket *input : node->input_sockets()) {
const DInputSocket dinput{node.context(), input};
DSocket dorigin = get_input_origin_socket(dinput);
/* The origin socket is an output, which means the input is linked. So map the input to the
* result we get from the output. */
if (dorigin->is_output()) {
Result &result = compile_state.get_result_from_output_socket(DOutputSocket(dorigin));
operation->map_input_to_result(input->identifier, &result);
continue;
}
/* Otherwise, the origin socket is an input, which either means the input is unlinked and the
* origin is the input socket itself or the input is connected to an unlinked input of a group
* input node and the origin is the input of the group input node. So map the input to the
* result of a newly created Input Single Value Operation. */
auto *input_operation = new InputSingleValueOperation(context_, DInputSocket(dorigin));
operation->map_input_to_result(input->identifier, &input_operation->get_result());
operations_stream_.append(std::unique_ptr<InputSingleValueOperation>(input_operation));
input_operation->evaluate();
}
}
void Evaluator::compile_and_evaluate_shader_compile_unit(CompileState &compile_state)
{
ShaderCompileUnit &compile_unit = compile_state.get_shader_compile_unit();
ShaderOperation *operation = new ShaderOperation(context_, compile_unit);
for (DNode node : compile_unit) {
compile_state.map_node_to_shader_operation(node, operation);
}
map_shader_operation_inputs_to_their_results(operation, compile_state);
operations_stream_.append(std::unique_ptr<Operation>(operation));
operation->compute_results_reference_counts(compile_state.get_schedule());
operation->evaluate();
compile_state.reset_shader_compile_unit();
}
void Evaluator::map_shader_operation_inputs_to_their_results(ShaderOperation *operation,
CompileState &compile_state)
{
for (const auto &item : operation->get_inputs_to_linked_outputs_map().items()) {
Result &result = compile_state.get_result_from_output_socket(item.value);
operation->map_input_to_result(item.key, &result);
}
}
} // namespace blender::realtime_compositor
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