portability.h

/* Copyright (c) 2022, Holochip
 *
 * 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.
 */

/*
 * Portability Enumeration
 */

#pragma once

#include "api_vulkan_sample.h"

class Portability : public ApiVulkanSample
{
  public:
	bool bloom             = true;
	bool display_skysphere = true;
#ifdef VK_ENABLE_BETA_EXTENSIONS
	VkPhysicalDevicePortabilitySubsetFeaturesKHR portability_features{};
#endif

	struct
	{
		Texture skysphere;
	} textures;

	struct
	{
		std::unique_ptr<vkb::sg::SubMesh> skysphere;
		std::unique_ptr<vkb::sg::SubMesh> scene;
	} models;

	struct
	{
		std::unique_ptr<vkb::core::Buffer> matrices;
	} uniform_buffers;

	struct UBOVS
	{
		glm::mat4 projection;
		glm::mat4 modelview;
		glm::mat4 skysphere_modelview;
		float     modelscale = 0.05f;
	} ubo_vs;

	struct
	{
		VkPipeline skysphere;
		VkPipeline sphere;
		VkPipeline composition;
		VkPipeline bloom[2];
	} pipelines;

	struct
	{
		VkPipelineLayout models;
		VkPipelineLayout composition;
		VkPipelineLayout bloom_filter;
	} pipeline_layouts;

	struct
	{
		VkDescriptorSet skysphere;
		VkDescriptorSet sphere;
		VkDescriptorSet composition;
		VkDescriptorSet bloom_filter;
	} descriptor_sets;

	struct
	{
		VkDescriptorSetLayout models;
		VkDescriptorSetLayout composition;
		VkDescriptorSetLayout bloom_filter;
	} descriptor_set_layouts;

	// Framebuffer for offscreen rendering
	struct FrameBufferAttachment
	{
		VkImage        image;
		VkDeviceMemory mem;
		VkImageView    view;
		VkFormat       format;
		void           destroy(VkDevice device) const
		{
			vkDestroyImageView(device, view, nullptr);
			vkDestroyImage(device, image, nullptr);
			vkFreeMemory(device, mem, nullptr);
		}
	};
	struct FrameBuffer
	{
		int32_t               width, height;
		VkFramebuffer         framebuffer;
		FrameBufferAttachment color[2];
		FrameBufferAttachment depth;
		VkRenderPass          render_pass;
		VkSampler             sampler;
	} offscreen;

	struct
	{
		int32_t               width, height;
		VkFramebuffer         framebuffer;
		FrameBufferAttachment color[1];
		VkRenderPass          render_pass;
		VkSampler             sampler;
	} filter_pass;

	struct
	{
		glm::vec4 offset;
		glm::vec4 color;
		uint32_t  object_type;
	} push_const_block;

	Portability();
	~Portability() override;
	VkPipelineShaderStageCreateInfo debug_load_shader(const std::string &file, VkShaderStageFlagBits stage);
	void                            request_gpu_features(vkb::PhysicalDevice &gpu) override;
	void                            build_command_buffers() override;
	void                            create_attachment(VkFormat format, VkImageUsageFlagBits usage, FrameBufferAttachment *attachment);
	void                            prepare_offscreen_buffer();
	void                            load_assets();
	void                            setup_descriptor_pool();
	void                            setup_descriptor_set_layout();
	void                            setup_descriptor_sets();
	void                            prepare_pipelines();
	void                            prepare_uniform_buffers();
	void                            update_uniform_buffers();
	void                            draw();
	bool                            prepare(vkb::Platform &platform) override;
	void                            render(float delta_time) override;
	void                            on_update_ui_overlay(vkb::Drawer &drawer) override;
	bool                            resize(const uint32_t width, const uint32_t height) override;
};

std::unique_ptr<vkb::Application> create_portability();