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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Blender Foundation. */
#pragma once
#include "BLI_map.hh"
#include "BLI_vector.hh"
#include "DNA_vec_types.h"
#ifdef WITH_CXX_GUARDEDALLOC
# include "MEM_guardedalloc.h"
#endif
namespace blender::compositor {
class MemoryBuffer;
class NodeOperation;
/**
* Stores and shares operations rendered buffers including render data. Buffers are
* disposed once all dependent operations have finished reading them.
*/
class SharedOperationBuffers {
private:
typedef struct BufferData {
public:
BufferData();
std::unique_ptr<MemoryBuffer> buffer;
blender::Vector<rcti> render_areas;
int registered_reads;
int received_reads;
bool is_rendered;
} BufferData;
blender::Map<NodeOperation *, BufferData> buffers_;
public:
/**
* Whether given operation area to render is already registered.
*/
bool is_area_registered(NodeOperation *op, const rcti &area_to_render);
/**
* Registers an operation area to render.
*/
void register_area(NodeOperation *op, const rcti &area_to_render);
/**
* Whether given operation has any registered reads (other operation registered it depends on
* given operation).
*/
bool has_registered_reads(NodeOperation *op);
/**
* Registers an operation read (other operation depends on given operation).
*/
void register_read(NodeOperation *read_op);
/**
* Get registered areas given operation needs to render.
*/
Vector<rcti> get_areas_to_render(NodeOperation *op, int offset_x, int offset_y);
/**
* Whether this operation buffer has already been rendered.
*/
bool is_operation_rendered(NodeOperation *op);
/**
* Stores given operation rendered buffer.
*/
void set_rendered_buffer(NodeOperation *op, std::unique_ptr<MemoryBuffer> buffer);
/**
* Get given operation rendered buffer.
*/
MemoryBuffer *get_rendered_buffer(NodeOperation *op);
/**
* Reports an operation has finished reading given operation. If all given operation dependencies
* have finished its buffer will be disposed.
*/
void read_finished(NodeOperation *read_op);
private:
BufferData &get_buffer_data(NodeOperation *op);
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("COM:SharedOperationBuffers")
#endif
};
} // namespace blender::compositor
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