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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Blender Foundation.
*/
/** \file
* \ingroup eevee
*
* Cryptomatte.
*
* During rasterization, cryptomatte hashes are stored into a single array texture.
* The film pass then resamples this texture using pixel filter weighting.
* Each cryptomatte layer can hold N samples. These are stored in sequential layers
* of the array texture. The samples are sorted and merged only for final rendering.
*/
#pragma once
#include "eevee_shader_shared.hh"
#include "BKE_cryptomatte.hh"
extern "C" {
struct Material;
struct CryptomatteSession;
}
namespace blender::eevee {
class Instance;
/* -------------------------------------------------------------------- */
/** \name Cryptomatte
* \{ */
class Cryptomatte {
private:
class Instance &inst_;
bke::cryptomatte::CryptomatteSessionPtr session_;
/* Cached pointer to the cryptomatte layer instances. */
bke::cryptomatte::CryptomatteLayer *object_layer_ = nullptr;
bke::cryptomatte::CryptomatteLayer *asset_layer_ = nullptr;
bke::cryptomatte::CryptomatteLayer *material_layer_ = nullptr;
/** Contains per object hashes (object and asset hash). Indexed by resource ID. */
CryptomatteObjectBuf cryptomatte_object_buf;
public:
Cryptomatte(Instance &inst) : inst_(inst){};
void begin_sync();
void sync_object(Object *ob, ResourceHandle res_handle);
void sync_material(const ::Material *material);
void end_sync();
template<typename T> void bind_resources(draw::detail::PassBase<T> *pass)
{
pass->bind_ssbo(CRYPTOMATTE_BUF_SLOT, &cryptomatte_object_buf);
}
/* Register ID to use inside cryptomatte layer and returns associated hash as float. */
float register_id(const eViewLayerEEVEEPassType layer, const ID &id) const;
void store_metadata(RenderResult *render_result);
};
/** \} */
} // namespace blender::eevee
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