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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 2016, Blender Foundation.
*/
/** \file
* \ingroup draw
*/
#pragma once
#include "BLI_compiler_attrs.h"
#include "BLI_sys_types.h"
#include "GPU_batch.h"
#define MAX_INSTANCE_DATA_SIZE 64 /* Can be adjusted for more */
#define DRW_BUFFER_VERTS_CHUNK 128
struct GHash;
struct GPUUniformAttrList;
typedef struct DRWInstanceData DRWInstanceData;
typedef struct DRWInstanceDataList DRWInstanceDataList;
typedef struct DRWSparseUniformBuf DRWSparseUniformBuf;
/**
* Return a pointer to the next instance data space.
*/
void *DRW_instance_data_next(DRWInstanceData *idata);
DRWInstanceData *DRW_instance_data_request(DRWInstanceDataList *idatalist, uint attr_size);
/**
* This manager allows to distribute existing batches for instancing
* attributes. This reduce the number of batches creation.
* Querying a batch is done with a vertex format. This format should
* be static so that its pointer never changes (because we are using
* this pointer as identifier [we don't want to check the full format
* that would be too slow]).
*/
GPUVertBuf *DRW_temp_buffer_request(DRWInstanceDataList *idatalist,
GPUVertFormat *format,
int *vert_len);
/**
* \note Does not return a valid drawable batch until DRW_instance_buffer_finish has run.
* Initialization is delayed because instancer or geom could still not be initialized.
*/
GPUBatch *DRW_temp_batch_instance_request(DRWInstanceDataList *idatalist,
GPUVertBuf *buf,
GPUBatch *instancer,
GPUBatch *geom);
/**
* \note Use only with buf allocated via DRW_temp_buffer_request.
*/
GPUBatch *DRW_temp_batch_request(DRWInstanceDataList *idatalist,
GPUVertBuf *buf,
GPUPrimType type);
/**
* Upload all instance data to the GPU as soon as possible.
*/
void DRW_instance_buffer_finish(DRWInstanceDataList *idatalist);
void DRW_instance_data_list_reset(DRWInstanceDataList *idatalist);
void DRW_instance_data_list_free_unused(DRWInstanceDataList *idatalist);
void DRW_instance_data_list_resize(DRWInstanceDataList *idatalist);
/* Sparse chunked UBO manager. */
/**
* Allocate a chunked UBO with the specified item and chunk size.
*/
DRWSparseUniformBuf *DRW_sparse_uniform_buffer_new(unsigned int item_size,
unsigned int chunk_size);
/**
* Flush data from ordinary memory to UBOs.
*/
void DRW_sparse_uniform_buffer_flush(DRWSparseUniformBuf *buffer);
/**
* Clean all buffers and free unused ones.
*/
void DRW_sparse_uniform_buffer_clear(DRWSparseUniformBuf *buffer, bool free_all);
/**
* Frees the buffer.
*/
void DRW_sparse_uniform_buffer_free(DRWSparseUniformBuf *buffer);
/**
* Checks if the buffer contains any allocated chunks.
*/
bool DRW_sparse_uniform_buffer_is_empty(DRWSparseUniformBuf *buffer);
/**
* Bind the UBO for the given chunk, if present. A NULL buffer pointer is handled as empty.
*/
void DRW_sparse_uniform_buffer_bind(DRWSparseUniformBuf *buffer, int chunk, int location);
/**
* Unbind the UBO for the given chunk, if present. A NULL buffer pointer is handled as empty.
*/
void DRW_sparse_uniform_buffer_unbind(DRWSparseUniformBuf *buffer, int chunk);
/**
* Returns a pointer to the given item of the given chunk, allocating memory if necessary.
*/
void *DRW_sparse_uniform_buffer_ensure_item(DRWSparseUniformBuf *buffer, int chunk, int item);
/* Uniform attribute UBO management. */
struct GHash *DRW_uniform_attrs_pool_new(void);
void DRW_uniform_attrs_pool_flush_all(struct GHash *table);
void DRW_uniform_attrs_pool_clear_all(struct GHash *table);
struct DRWSparseUniformBuf *DRW_uniform_attrs_pool_find_ubo(struct GHash *table,
struct GPUUniformAttrList *key);
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