gl_storage_buffer.hh

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/* SPDX-FileCopyrightText: 2022 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#pragma once
 
#include "MEM_guardedalloc.h"
 
#include "GPU_vertex_buffer.hh"
 
#include "gpu_storage_buffer_private.hh"
 
namespace blender {
namespace gpu {

class GLStorageBuf : public StorageBuf {
 private:
  int slot_ = -1;
  GLuint ssbo_id_ = 0;
  GPUUsageType usage_ = GPUUsageType(-1);
  /* Read */
  GLuint read_ssbo_id_ = 0;
  GLsync read_fence_ = 0;
  void *persistent_ptr_ = nullptr;
  size_t alloc_size_in_bytes_ = 0;
 
 public:
  GLStorageBuf(size_t size, GPUUsageType usage, const char *name);
  ~GLStorageBuf();
 
  void update(const void *data) override;
  void bind(int slot) override;
  void unbind() override;
  void clear(uint32_t clear_value) override;
  void copy_sub(VertBuf *src, uint dst_offset, uint src_offset, uint copy_size) override;
  void read(void *data) override;
  void async_flush_to_host() override;
  void sync_as_indirect_buffer() override;
 
  /* Special internal function to bind SSBOs to indirect argument targets. */
  void bind_as(GLenum target);
 
 private:
  void init();
 
  MEM_CXX_CLASS_ALLOC_FUNCS("GLStorageBuf");
};
 
}  // namespace gpu
}  // namespace blender