buffer_device_address.h

/* Copyright (c) 2021, Arm Limited and Contributors
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 the "License";
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include "api_vulkan_sample.h"
#include <memory>
#include <vector>

class BufferDeviceAddress : public ApiVulkanSample
{
  public:
	BufferDeviceAddress();
	~BufferDeviceAddress();

  private:
	virtual void request_gpu_features(vkb::PhysicalDevice &gpu) override;
	virtual void render(float delta_time) override;
	virtual void build_command_buffers() override;
	virtual void on_update_ui_overlay(vkb::Drawer &drawer) override;
	virtual bool prepare(vkb::Platform &platform) override;

	void             create_pipelines();
	VkPipelineLayout create_pipeline_layout(bool graphics);
	void             create_compute_pipeline();
	void             create_graphics_pipeline();

	void update_pointer_buffer(VkCommandBuffer cmd);
	void update_meshlets(VkCommandBuffer cmd);

	struct Pipelines
	{
		VkPipelineLayout compute_pipeline_layout{};
		VkPipelineLayout graphics_pipeline_layout{};
		VkPipeline       bindless_vbo_pipeline{};
		VkPipeline       compute_update_pipeline{};
	} pipelines;

	struct TestBuffer
	{
		VkBuffer        buffer{};
		VkDeviceMemory  memory{};
		VkDeviceAddress gpu_address{};
	};
	std::vector<TestBuffer> test_buffers;
	void                    create_vbo_buffers();
	TestBuffer              create_vbo_buffer();
	TestBuffer              create_pointer_buffer();
	TestBuffer              pointer_buffer;

	std::unique_ptr<vkb::core::Buffer> create_index_buffer();
	std::unique_ptr<vkb::core::Buffer> index_buffer;

	std::default_random_engine            rnd{42};
	std::uniform_real_distribution<float> distribution{0.0f, 0.1f};
	uint32_t                              descriptor_offset{};
	float                                 accumulated_time{};
	uint32_t                              num_indices_per_mesh{};
};

std::unique_ptr<vkb::VulkanSample> create_buffer_device_address();