vk_storage_buffer.cc

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/* SPDX-FileCopyrightText: 2022 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#include "vk_shader.hh"
#include "vk_shader_interface.hh"
#include "vk_staging_buffer.hh"
#include "vk_state_manager.hh"
#include "vk_vertex_buffer.hh"
 
#include "vk_storage_buffer.hh"
 
namespace blender::gpu {
 
VKStorageBuffer::VKStorageBuffer(size_t size, GPUUsageType usage, const char *name)
    : StorageBuf(size, name), usage_(usage)
{
}
 
void VKStorageBuffer::update(const void *data)
{
  VKContext &context = *VKContext::get();
  ensure_allocated();
  VKStagingBuffer staging_buffer(buffer_, VKStagingBuffer::Direction::HostToDevice);
  staging_buffer.host_buffer_get().update_immediately(data);
  staging_buffer.copy_to_device(context);
}
 
void VKStorageBuffer::ensure_allocated()
{
  if (!buffer_.is_allocated()) {
    allocate();
  }
}
 
void VKStorageBuffer::allocate()
{
  const bool is_host_visible = false;
  const VkBufferUsageFlags buffer_usage_flags = VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT |
                                                VK_BUFFER_USAGE_STORAGE_BUFFER_BIT |
                                                VK_BUFFER_USAGE_TRANSFER_SRC_BIT |
                                                VK_BUFFER_USAGE_TRANSFER_DST_BIT;
  buffer_.create(size_in_bytes_, usage_, buffer_usage_flags, is_host_visible);
  debug::object_label(buffer_.vk_handle(), name_);
}
 
void VKStorageBuffer::bind(int slot)
{
  VKContext &context = *VKContext::get();
  context.state_manager_get().storage_buffer_bind(
      BindSpaceStorageBuffers::Type::StorageBuffer, this, slot);
}
 
void VKStorageBuffer::unbind()
{
  VKContext *context = VKContext::get();
  if (context) {
    context->state_manager_get().storage_buffer_unbind(this);
  }
}
 
void VKStorageBuffer::clear(uint32_t clear_value)
{
  ensure_allocated();
  VKContext &context = *VKContext::get();
  buffer_.clear(context, clear_value);
}
 
void VKStorageBuffer::copy_sub(VertBuf *src, uint dst_offset, uint src_offset, uint copy_size)
{
  ensure_allocated();
 
  VKVertexBuffer &src_vertex_buffer = *unwrap(src);
  src_vertex_buffer.upload();
 
  render_graph::VKCopyBufferNode::CreateInfo copy_buffer = {};
  copy_buffer.src_buffer = src_vertex_buffer.vk_handle();
  copy_buffer.dst_buffer = vk_handle();
  copy_buffer.region.srcOffset = src_offset;
  copy_buffer.region.dstOffset = dst_offset;
  copy_buffer.region.size = copy_size;
 
  VKContext &context = *VKContext::get();
  context.render_graph.add_node(copy_buffer);
}
 
void VKStorageBuffer::async_flush_to_host()
{
  GPU_memory_barrier(GPU_BARRIER_BUFFER_UPDATE);
}
 
void VKStorageBuffer::read(void *data)
{
  ensure_allocated();
  VKContext &context = *VKContext::get();
  VKStagingBuffer staging_buffer(buffer_, VKStagingBuffer::Direction::DeviceToHost);
  staging_buffer.copy_from_device(context);
  staging_buffer.host_buffer_get().read(context, data);
}
 
}  // namespace blender::gpu