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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.
*
* Copyright 2021, Blender Foundation.
*/
#pragma once
#include <string>
#include "BKE_cryptomatte.hh"
#include "BLI_map.hh"
#include "MEM_guardedalloc.h"
/* Forward declarations. */
struct RenderResult;
namespace blender::compositor {
/* Cryptomatte includes hash in its meta data keys. The hash is generated from the render
* layer/pass name. Compositing happens without the knowledge of the original layer and pass. The
* next keys are used to transfer the cryptomatte meta data in a neutral way. The file output node
* will generate a hash based on the layer name configured by the user.
*
* The `{hash}` has no special meaning except to make sure that the meta data stays unique. */
constexpr blender::StringRef META_DATA_KEY_CRYPTOMATTE_HASH("cryptomatte/{hash}/hash");
constexpr blender::StringRef META_DATA_KEY_CRYPTOMATTE_CONVERSION("cryptomatte/{hash}/conversion");
constexpr blender::StringRef META_DATA_KEY_CRYPTOMATTE_MANIFEST("cryptomatte/{hash}/manifest");
constexpr blender::StringRef META_DATA_KEY_CRYPTOMATTE_NAME("cryptomatte/{hash}/name");
class MetaData {
private:
Map<std::string, std::string> entries_;
void add_cryptomatte_entry(const blender::StringRef layer_name,
const blender::StringRefNull key,
const blender::StringRef value);
public:
void add(const blender::StringRef key, const blender::StringRef value);
void replace_hash_neutral_cryptomatte_keys(const blender::StringRef layer_name);
void add_to_render_result(RenderResult *render_result) const;
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("COM:MetaData")
#endif
};
struct MetaDataExtractCallbackData {
std::unique_ptr<MetaData> meta_data;
std::string hash_key;
std::string conversion_key;
std::string manifest_key;
void add_meta_data(blender::StringRef key, blender::StringRefNull value);
void set_cryptomatte_keys(blender::StringRef cryptomatte_layer_name);
/* C type callback function (StampCallback). */
static void extract_cryptomatte_meta_data(void *_data,
const char *propname,
char *propvalue,
int UNUSED(len));
};
} // namespace blender::compositor
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