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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2017 Blender Foundation. All rights reserved. */
/** \file
* \ingroup depsgraph
*/
#pragma once
#include <stddef.h>
#include "DNA_ID.h"
struct ID;
/* Uncomment this to have verbose log about original and CoW pointers
* logged, with detailed information when they are allocated, expanded
* and remapped.
*/
// #define DEG_DEBUG_COW_POINTERS
#ifdef DEG_DEBUG_COW_POINTERS
# define DEG_COW_PRINT(format, ...) printf(format, __VA_ARGS__);
#else
# define DEG_COW_PRINT(format, ...)
#endif
struct Depsgraph;
namespace blender {
namespace deg {
struct Depsgraph;
class DepsgraphNodeBuilder;
struct IDNode;
/**
* Makes sure given CoW data-block is brought back to state of the original
* data-block.
*/
ID *deg_update_copy_on_write_datablock(const struct Depsgraph *depsgraph, const IDNode *id_node);
ID *deg_update_copy_on_write_datablock(const struct Depsgraph *depsgraph, struct ID *id_orig);
/** Helper function which frees memory used by copy-on-written data-block. */
void deg_free_copy_on_write_datablock(struct ID *id_cow);
/**
* Callback function for depsgraph operation node which ensures copy-on-write
* data-block is ready for use by further evaluation routines.
*/
void deg_evaluate_copy_on_write(struct ::Depsgraph *depsgraph, const struct IDNode *id_node);
/**
* Check that given ID is properly expanded and does not have any shallow
* copies inside.
*/
bool deg_validate_copy_on_write_datablock(ID *id_cow);
/** Tag given ID block as being copy-on-written. */
void deg_tag_copy_on_write_id(struct ID *id_cow, const struct ID *id_orig);
/**
* Check whether ID data-block is expanded.
*
* TODO(sergey): Make it an inline function or a macro.
*/
bool deg_copy_on_write_is_expanded(const struct ID *id_cow);
/**
* Check whether copy-on-write data-block is needed for given ID.
*
* There are some exceptions on data-blocks which are covered by dependency graph
* but which we don't want to start duplicating.
*
* This includes images.
*/
bool deg_copy_on_write_is_needed(const ID *id_orig);
bool deg_copy_on_write_is_needed(const ID_Type id_type);
} // namespace deg
} // namespace blender
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