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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2022 Blender Foundation. */
/** \file
* \ingroup draw
*/
#include "DNA_particle_types.h"
#include "RNA_access.h"
#include "RNA_path.h"
#include "RNA_types.h"
#include "draw_handle.hh"
#include "draw_manager.hh"
#include "draw_shader_shared.h"
/* -------------------------------------------------------------------- */
/** \name ObjectAttributes
* \{ */
/**
* Extract object attribute from RNA property.
* Returns true if the attribute was correctly extracted.
* This function mirrors lookup_property in cycles/blender/blender_object.cpp
*/
bool ObjectAttribute::id_property_lookup(ID *id, const char *name)
{
PointerRNA ptr, id_ptr;
PropertyRNA *prop;
if (id == nullptr) {
return false;
}
RNA_id_pointer_create(id, &id_ptr);
if (!RNA_path_resolve(&id_ptr, name, &ptr, &prop)) {
return false;
}
if (prop == nullptr) {
return false;
}
PropertyType type = RNA_property_type(prop);
int array_len = RNA_property_array_length(&ptr, prop);
if (array_len == 0) {
float value;
if (type == PROP_FLOAT) {
value = RNA_property_float_get(&ptr, prop);
}
else if (type == PROP_INT) {
value = RNA_property_int_get(&ptr, prop);
}
else {
return false;
}
*reinterpret_cast<float4 *>(&data_x) = float4(value, value, value, 1.0f);
return true;
}
if (type == PROP_FLOAT && array_len <= 4) {
*reinterpret_cast<float4 *>(&data_x) = float4(0.0f, 0.0f, 0.0f, 1.0f);
RNA_property_float_get_array(&ptr, prop, &data_x);
return true;
}
return false;
}
/**
* Go through all possible source of the given object uniform attribute.
* Returns true if the attribute was correctly filled.
* This function mirrors lookup_instance_property in cycles/blender/blender_object.cpp
*/
bool ObjectAttribute::sync(const blender::draw::ObjectRef &ref, const GPUUniformAttr &attr)
{
hash_code = attr.hash_code;
/* If requesting instance data, check the parent particle system and object. */
if (attr.use_dupli) {
if ((ref.dupli_object != nullptr) && (ref.dupli_object->particle_system != nullptr)) {
ParticleSettings *settings = ref.dupli_object->particle_system->part;
if (this->id_property_lookup((ID *)settings, attr.name_id_prop) ||
this->id_property_lookup((ID *)settings, attr.name)) {
return true;
}
}
if (this->id_property_lookup((ID *)ref.dupli_parent, attr.name_id_prop) ||
this->id_property_lookup((ID *)ref.dupli_parent, attr.name)) {
return true;
}
}
/* Check the object and mesh. */
if (ref.object != nullptr) {
if (this->id_property_lookup((ID *)ref.object, attr.name_id_prop) ||
this->id_property_lookup((ID *)ref.object, attr.name) ||
this->id_property_lookup((ID *)ref.object->data, attr.name_id_prop) ||
this->id_property_lookup((ID *)ref.object->data, attr.name)) {
return true;
}
}
return false;
}
/** \} */
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