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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2022 Blender Foundation. All rights reserved. */
/** \file
* \ingroup gpu
*
* Storage buffers API. Used to handle many way bigger buffers than Uniform buffers update at once.
* Make sure that the data structure is compatible with what the implementation expect.
* (see "7.8 Shader Buffer Variables and Shader Storage Blocks" from the OpenGL spec for more info
* about std430 layout)
* Rule of thumb: Padding to 16bytes, don't use vec3.
*/
#pragma once
#include "GPU_texture.h"
#include "GPU_vertex_buffer.h"
#ifdef __cplusplus
extern "C" {
#endif
struct ListBase;
/** Opaque type hiding blender::gpu::StorageBuf. */
typedef struct GPUStorageBuf GPUStorageBuf;
GPUStorageBuf *GPU_storagebuf_create_ex(size_t size,
const void *data,
GPUUsageType usage,
const char *name);
#define GPU_storagebuf_create(size) \
GPU_storagebuf_create_ex(size, NULL, GPU_USAGE_DYNAMIC, __func__);
void GPU_storagebuf_free(GPUStorageBuf *ssbo);
void GPU_storagebuf_update(GPUStorageBuf *ssbo, const void *data);
void GPU_storagebuf_bind(GPUStorageBuf *ssbo, int slot);
void GPU_storagebuf_unbind(GPUStorageBuf *ssbo);
void GPU_storagebuf_unbind_all(void);
void GPU_storagebuf_clear(GPUStorageBuf *ssbo,
eGPUTextureFormat internal_format,
eGPUDataFormat data_format,
void *data);
void GPU_storagebuf_clear_to_zero(GPUStorageBuf *ssbo);
/**
* \brief Copy a part of a vertex buffer to a storage buffer.
*
* \param ssbo: destination storage buffer
* \param src: source vertex buffer
* \param dst_offset: where to start copying to (in bytes).
* \param src_offset: where to start copying from (in bytes).
* \param copy_size: byte size of the segment to copy.
*/
void GPU_storagebuf_copy_sub_from_vertbuf(
GPUStorageBuf *ssbo, GPUVertBuf *src, uint dst_offset, uint src_offset, uint copy_size);
#ifdef __cplusplus
}
#endif
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