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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.
*
* The Original Code is Copyright (C) 2019 Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup depsgraph
*/
#pragma once
#include "BKE_modifier.h"
#include "intern/depsgraph_type.h"
struct ModifierData;
namespace blender {
namespace deg {
struct Depsgraph;
/* Identifier used to match modifiers to backup/restore their runtime data.
* Identification is happening using original modifier data pointer and the
* modifier type.
* It is not enough to only pointer, since it's possible to have a situation
* when modifier is removed and a new one added, and due to memory allocation
* policy they might have same pointer.
* By adding type into matching we are at least ensuring that modifier will not
* try to interpret runtime data created by another modifier type. */
class ModifierDataBackupID {
public:
ModifierDataBackupID(const Depsgraph *depsgraph);
ModifierDataBackupID(ModifierData *modifier_data, ModifierType type);
friend bool operator==(const ModifierDataBackupID &a, const ModifierDataBackupID &b);
uint64_t hash() const;
ModifierData *modifier_data;
ModifierType type;
};
/* Storage for backed up runtime modifier data. */
typedef Map<ModifierDataBackupID, void *> ModifierRuntimeDataBackup;
} // namespace deg
} // namespace blender
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