/*
* Vulkan Example - Using VK_EXT_graphics_pipeline_library
* 
* Important note: Work-in-progress, sample is not finished yet
*
* Copyright (C) 2022 by Sascha Willems - www.saschawillems.de
*
* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
*/

#include "vulkanexamplebase.h"
#include "VulkanglTFModel.h"

#define ENABLE_VALIDATION false

class VulkanExample: public VulkanExampleBase
{
public:
	vkglTF::Model scene;

	vks::Buffer uniformBuffer;

	// Same uniform buffer layout as shader
	struct UBOVS {
		glm::mat4 projection;
		glm::mat4 modelView;
		glm::vec4 lightPos = glm::vec4(0.0f, 2.0f, 1.0f, 0.0f);
	} uboVS;

	VkPipelineLayout pipelineLayout;
	VkDescriptorSet descriptorSet;
	VkDescriptorSetLayout descriptorSetLayout;

	VkPhysicalDeviceGraphicsPipelineLibraryFeaturesEXT graphicsPipelineLibraryFeatures{};

	struct {
		VkPipeline phong;
		VkPipeline wireframe;
		VkPipeline toon;
	} pipelines;

	struct ShaderInfo {
		uint32_t* code;
		size_t size;
	};

	VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
	{
		title = "Graphics pipeline library";
		camera.type = Camera::CameraType::lookat;
		camera.setPosition(glm::vec3(0.0f, 0.0f, -10.5f));
		camera.setRotation(glm::vec3(-25.0f, 15.0f, 0.0f));
		camera.setRotationSpeed(0.5f);
		camera.setPerspective(60.0f, (float)(width / 3.0f) / (float)height, 0.1f, 256.0f);

		// Enable required extensions
		enabledInstanceExtensions.push_back(VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME);
		enabledDeviceExtensions.push_back(VK_KHR_PIPELINE_LIBRARY_EXTENSION_NAME);
		enabledDeviceExtensions.push_back(VK_EXT_GRAPHICS_PIPELINE_LIBRARY_EXTENSION_NAME);

		// Enable required extension features
		graphicsPipelineLibraryFeatures.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_GRAPHICS_PIPELINE_LIBRARY_FEATURES_EXT;
		graphicsPipelineLibraryFeatures.graphicsPipelineLibrary = VK_TRUE;
		deviceCreatepNextChain = &graphicsPipelineLibraryFeatures;
	}

	~VulkanExample()
	{
		// Clean up used Vulkan resources
		// Note : Inherited destructor cleans up resources stored in base class
		vkDestroyPipeline(device, pipelines.phong, nullptr);
		if (deviceFeatures.fillModeNonSolid)
		{
			vkDestroyPipeline(device, pipelines.wireframe, nullptr);
		}
		vkDestroyPipeline(device, pipelines.toon, nullptr);

		vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
		vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);

		uniformBuffer.destroy();
	}

	// Enable physical device features required for this example
	virtual void getEnabledFeatures()
	{
		// Fill mode non solid is required for wireframe display
		if (deviceFeatures.fillModeNonSolid) {
			enabledFeatures.fillModeNonSolid = VK_TRUE;
			// Wide lines must be present for line width > 1.0f
			if (deviceFeatures.wideLines) {
				enabledFeatures.wideLines = VK_TRUE;
			}
		};
	}

	void buildCommandBuffers()
	{
		VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();

		VkClearValue clearValues[2];
		clearValues[0].color = defaultClearColor;
		clearValues[1].depthStencil = { 1.0f, 0 };

		VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
		renderPassBeginInfo.renderPass = renderPass;
		renderPassBeginInfo.renderArea.offset.x = 0;
		renderPassBeginInfo.renderArea.offset.y = 0;
		renderPassBeginInfo.renderArea.extent.width = width;
		renderPassBeginInfo.renderArea.extent.height = height;
		renderPassBeginInfo.clearValueCount = 2;
		renderPassBeginInfo.pClearValues = clearValues;

		for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
		{
			// Set target frame buffer
			renderPassBeginInfo.framebuffer = frameBuffers[i];

			VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));

			vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);

			VkViewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
			vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);

			VkRect2D scissor = vks::initializers::rect2D(width, height,	0, 0);
			vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);

			vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, NULL);
			scene.bindBuffers(drawCmdBuffers[i]);

			// Left : Solid colored
			viewport.width = (float)width / 3.0;
			vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
			vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.phong);
			scene.draw(drawCmdBuffers[i]);

			// Center : Toon
			viewport.x = (float)width / 3.0;
			vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
			vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.toon);
			// Line width > 1.0f only if wide lines feature is supported
			if (deviceFeatures.wideLines) {
				vkCmdSetLineWidth(drawCmdBuffers[i], 2.0f);
			}
			scene.draw(drawCmdBuffers[i]);

			if (deviceFeatures.fillModeNonSolid)
			{
				// Right : Wireframe
				viewport.x = (float)width / 3.0 + (float)width / 3.0;
				vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
				vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.wireframe);
				scene.draw(drawCmdBuffers[i]);
			}

			drawUI(drawCmdBuffers[i]);

			vkCmdEndRenderPass(drawCmdBuffers[i]);

			VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
		}
	}

	void loadAssets()
	{
		const uint32_t glTFLoadingFlags = vkglTF::FileLoadingFlags::PreTransformVertices | vkglTF::FileLoadingFlags::PreMultiplyVertexColors | vkglTF::FileLoadingFlags::FlipY;
		scene.loadFromFile(getAssetPath() + "models/treasure_smooth.gltf", vulkanDevice, queue, glTFLoadingFlags);
	}

	void setupDescriptorPool()
	{
		std::vector<VkDescriptorPoolSize> poolSizes =
		{
			vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1)
		};

		VkDescriptorPoolCreateInfo descriptorPoolInfo =
			vks::initializers::descriptorPoolCreateInfo(
				poolSizes.size(),
				poolSizes.data(),
				2);

		VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
	}

	void setupDescriptorSetLayout()
	{
		std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings =
		{
			// Binding 0 : Vertex shader uniform buffer
			vks::initializers::descriptorSetLayoutBinding(
				VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
				VK_SHADER_STAGE_VERTEX_BIT,
				0)
		};

		VkDescriptorSetLayoutCreateInfo descriptorLayout =
			vks::initializers::descriptorSetLayoutCreateInfo(
				setLayoutBindings.data(),
				setLayoutBindings.size());

		VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));

		VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
			vks::initializers::pipelineLayoutCreateInfo(
				&descriptorSetLayout,
				1);

		VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout));
	}

	void setupDescriptorSet()
	{
		VkDescriptorSetAllocateInfo allocInfo =
			vks::initializers::descriptorSetAllocateInfo(
				descriptorPool,
				&descriptorSetLayout,
				1);

		VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));

		std::vector<VkWriteDescriptorSet> writeDescriptorSets =
		{
			// Binding 0 : Vertex shader uniform buffer
			vks::initializers::writeDescriptorSet(
				descriptorSet,
				VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
				0,
				&uniformBuffer.descriptor)
		};

		vkUpdateDescriptorSets(device, writeDescriptorSets.size(), writeDescriptorSets.data(), 0, NULL);
	}

	// With VK_EXT_graphics_pipeline_library we don't need to create the shader module when loading it, but instead have the driver create it at linking time
	// So we use a custom function that only loads the required shader information without actually creating the shader module

#if defined(__ANDROID__)
	// Android shaders are stored as assets in the apk so they need to be loaded via the asset manager
	bool loadShader(AAssetManager* assetManager, std::string fileName, const uint32_t** pShaderCode, size_t& shaderSize)
	{
		// Load shader from compressed asset
		AAsset* asset = AAssetManager_open(assetManager, fileName, AASSET_MODE_STREAMING);
		assert(asset);
		size_t size = AAsset_getLength(asset);
		assert(size > 0);

		char* shaderCode = new char[size];
		AAsset_read(asset, shaderCode, size);
		AAsset_close(asset);

		VkShaderModule shaderModule;
		VkShaderModuleCreateInfo moduleCreateInfo;
		moduleCreateInfo.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
		moduleCreateInfo.pNext = NULL;
		moduleCreateInfo.codeSize = size;
		moduleCreateInfo.pCode = (uint32_t*)shaderCode;
		moduleCreateInfo.flags = 0;

		VK_CHECK_RESULT(vkCreateShaderModule(device, &moduleCreateInfo, NULL, &shaderModule));

		delete[] shaderCode;

		return shaderModule;
	}
#else
	bool loadShaderFile(std::string fileName, ShaderInfo &shaderInfo)
	{
		std::ifstream is(fileName, std::ios::binary | std::ios::in | std::ios::ate);

		if (is.is_open())
		{
			shaderInfo.size = is.tellg();
			is.seekg(0, std::ios::beg);
			shaderInfo.code = new uint32_t[shaderInfo.size];
			is.read(reinterpret_cast<char*>(shaderInfo.code), shaderInfo.size);
			is.close();
			return true;
		} else {
			std::cerr << "Error: Could not open shader file \"" << fileName << "\"" << "\n";
			return false;
		}
	}
#endif

	VkPipeline createVertexInputState(VkDevice device, VkPipelineCache vertexShaderCache, VkPipelineLayout layout)
	{
		VkGraphicsPipelineLibraryCreateInfoEXT libraryInfo{};
		libraryInfo.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_LIBRARY_CREATE_INFO_EXT;
		libraryInfo.flags = VK_GRAPHICS_PIPELINE_LIBRARY_VERTEX_INPUT_INTERFACE_BIT_EXT;

		VkPipelineVertexInputStateCreateInfo vertexInputState = *vkglTF::Vertex::getPipelineVertexInputState({ vkglTF::VertexComponent::Position, vkglTF::VertexComponent::Normal, vkglTF::VertexComponent::Color });
		VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);

		VkGraphicsPipelineCreateInfo pipelineCI{};
		pipelineCI.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
		pipelineCI.pNext = &libraryInfo;
		pipelineCI.pInputAssemblyState = &inputAssemblyState;
		pipelineCI.pVertexInputState = &vertexInputState;

		VkPipeline library = VK_NULL_HANDLE;
		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, vertexShaderCache, 1, &pipelineCI, nullptr, &library));
		return library;
	}

	VkPipeline createVertexShader(VkDevice device, const ShaderInfo shaderInfo, VkPipelineCache vertexShaderCache, VkPipelineLayout layout)
	{
		VkGraphicsPipelineLibraryCreateInfoEXT libraryInfo{};
		libraryInfo.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_LIBRARY_CREATE_INFO_EXT;
		libraryInfo.flags = VK_GRAPHICS_PIPELINE_LIBRARY_PRE_RASTERIZATION_SHADERS_BIT_EXT;

		VkDynamicState vertexDynamicStates[2] = {
			VK_DYNAMIC_STATE_VIEWPORT,
			VK_DYNAMIC_STATE_SCISSOR };

		VkPipelineDynamicStateCreateInfo dynamicInfo{};
		dynamicInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO;
		dynamicInfo.dynamicStateCount = 2;
		dynamicInfo.pDynamicStates = vertexDynamicStates;

		VkPipelineViewportStateCreateInfo viewportState = {};
		viewportState.sType = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO;
		viewportState.viewportCount = 1;
		viewportState.scissorCount = 1;

		VkPipelineRasterizationStateCreateInfo rasterizationState = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_BACK_BIT, VK_FRONT_FACE_COUNTER_CLOCKWISE, 0);

		VkShaderModuleCreateInfo shaderModuleCreateInfo{};
		shaderModuleCreateInfo.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
		shaderModuleCreateInfo.codeSize = shaderInfo.size;
		shaderModuleCreateInfo.pCode = shaderInfo.code;

		VkPipelineShaderStageCreateInfo shaderStageCreateInfo{};
		shaderStageCreateInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
		shaderStageCreateInfo.pNext = &shaderModuleCreateInfo;
		shaderStageCreateInfo.stage = VK_SHADER_STAGE_VERTEX_BIT;
		shaderStageCreateInfo.pName = "main";

		VkGraphicsPipelineCreateInfo pipelineCI{};
		pipelineCI.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
		pipelineCI.pNext = &libraryInfo;
		pipelineCI.renderPass = renderPass;
		pipelineCI.flags = VK_PIPELINE_CREATE_LIBRARY_BIT_KHR | VK_PIPELINE_CREATE_RETAIN_LINK_TIME_OPTIMIZATION_INFO_BIT_EXT;
		pipelineCI.stageCount = 1;
		pipelineCI.pStages = &shaderStageCreateInfo;
		pipelineCI.layout = layout;
		pipelineCI.pDynamicState = &dynamicInfo;
		pipelineCI.pViewportState = &viewportState;
		pipelineCI.pRasterizationState = &rasterizationState;

		VkPipeline library = VK_NULL_HANDLE;
		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, vertexShaderCache, 1, &pipelineCI, nullptr, &library));
		return library;
	}

	VkPipeline createFragmentShader(VkDevice device, const ShaderInfo shaderInfo, VkPipelineCache vertexShaderCache, VkPipelineLayout layout)
	{
		VkGraphicsPipelineLibraryCreateInfoEXT libraryInfo{};
		libraryInfo.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_LIBRARY_CREATE_INFO_EXT;
		libraryInfo.flags = VK_GRAPHICS_PIPELINE_LIBRARY_FRAGMENT_SHADER_BIT_EXT;

		VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
		VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT);

		VkShaderModuleCreateInfo shaderModuleCreateInfo{};
		shaderModuleCreateInfo.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
		shaderModuleCreateInfo.codeSize = shaderInfo.size;
		shaderModuleCreateInfo.pCode = shaderInfo.code;

		VkPipelineShaderStageCreateInfo shaderStageCreateInfo{};
		shaderStageCreateInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
		shaderStageCreateInfo.pNext = &shaderModuleCreateInfo;
		shaderStageCreateInfo.stage = VK_SHADER_STAGE_FRAGMENT_BIT;
		shaderStageCreateInfo.pName = "main";

		VkGraphicsPipelineCreateInfo pipelineCI{};
		pipelineCI.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
		pipelineCI.pNext = &libraryInfo;
		pipelineCI.flags = VK_PIPELINE_CREATE_LIBRARY_BIT_KHR | VK_PIPELINE_CREATE_RETAIN_LINK_TIME_OPTIMIZATION_INFO_BIT_EXT;
		pipelineCI.stageCount = 1;
		pipelineCI.pStages = &shaderStageCreateInfo;
		pipelineCI.layout = layout;
		pipelineCI.renderPass = renderPass;
		pipelineCI.pDepthStencilState = &depthStencilState;
		pipelineCI.pMultisampleState = &multisampleState;

		VkPipeline library = VK_NULL_HANDLE;
		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, vertexShaderCache, 1, &pipelineCI, nullptr, &library));
		return library;
	}

	VkPipeline createFragmentOutputState(VkDevice device, VkPipelineCache vertexShaderCache, VkPipelineLayout layout)
	{
		VkGraphicsPipelineLibraryCreateInfoEXT libraryInfo{};
		libraryInfo.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_LIBRARY_CREATE_INFO_EXT;
		libraryInfo.flags = VK_GRAPHICS_PIPELINE_LIBRARY_FRAGMENT_OUTPUT_INTERFACE_BIT_EXT;

		VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
		VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
		VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT);

		VkGraphicsPipelineCreateInfo pipelineCI{};
		pipelineCI.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
		pipelineCI.pNext = &libraryInfo;
		pipelineCI.flags = VK_PIPELINE_CREATE_LIBRARY_BIT_KHR | VK_PIPELINE_CREATE_RETAIN_LINK_TIME_OPTIMIZATION_INFO_BIT_EXT;
		pipelineCI.layout = layout;
		pipelineCI.renderPass = renderPass;
		pipelineCI.pColorBlendState = &colorBlendState;
		pipelineCI.pMultisampleState = &multisampleState;

		VkPipeline library = VK_NULL_HANDLE;
		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, vertexShaderCache, 1, &pipelineCI, nullptr, &library));
		return library;
	}

	VkPipeline linkExecutable(VkDevice device, const std::vector<VkPipeline> libraries, VkPipelineCache executableCache, bool optimized)
	{
		VkPipelineLibraryCreateInfoKHR linkingInfo{};
		linkingInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_LIBRARY_CREATE_INFO_KHR;
		linkingInfo.libraryCount = static_cast<uint32_t>(libraries.size());
		linkingInfo.pLibraries = libraries.data();

		VkGraphicsPipelineCreateInfo executablePipelineCreateInfo{};
		executablePipelineCreateInfo.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
		executablePipelineCreateInfo.pNext = &linkingInfo;
		executablePipelineCreateInfo.flags |= optimized ? VK_PIPELINE_CREATE_LINK_TIME_OPTIMIZATION_BIT_EXT : 0;

		VkPipeline executable = VK_NULL_HANDLE;
		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, executableCache, 1, &executablePipelineCreateInfo, nullptr, &executable));
		return executable;
	}

	void preparePipelines()
	{
		struct Shaders {
			ShaderInfo phongVS;
			ShaderInfo phongFS;
		} shaders;		
		loadShaderFile(getShadersPath() + "pipelines/phong.vert.spv", shaders.phongVS);
		loadShaderFile(getShadersPath() + "pipelines/phong.frag.spv", shaders.phongFS);
		VkPipelineShaderStageCreateInfo vsShader = loadShader(getShadersPath() + "pipelines/phong.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
		VkPipelineShaderStageCreateInfo fsShader = loadShader(getShadersPath() + "pipelines/phong.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
		std::vector<VkPipeline> libraries = {
			createVertexInputState(device, pipelineCache, pipelineLayout),
			createVertexShader(device, shaders.phongVS, pipelineCache, pipelineLayout),
			createFragmentShader(device, shaders.phongFS, pipelineCache, pipelineLayout),
			createFragmentOutputState(device, pipelineCache, pipelineLayout),
		};
		VkPipeline compiledPipeline = linkExecutable(device, libraries, pipelineCache, true);

		VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
		VkPipelineRasterizationStateCreateInfo rasterizationState = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_BACK_BIT, VK_FRONT_FACE_COUNTER_CLOCKWISE, 0);
		VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
		VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
		VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
		VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
		VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT);
		std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR, VK_DYNAMIC_STATE_LINE_WIDTH, };
		VkPipelineDynamicStateCreateInfo dynamicState = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);
		std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;

		VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo(pipelineLayout, renderPass);
		pipelineCI.pInputAssemblyState = &inputAssemblyState;
		pipelineCI.pRasterizationState = &rasterizationState;
		pipelineCI.pColorBlendState = &colorBlendState;
		pipelineCI.pMultisampleState = &multisampleState;
		pipelineCI.pViewportState = &viewportState;
		pipelineCI.pDepthStencilState = &depthStencilState;
		pipelineCI.pDynamicState = &dynamicState;
		pipelineCI.stageCount = shaderStages.size();
		pipelineCI.pStages = shaderStages.data();
		pipelineCI.pVertexInputState  = vkglTF::Vertex::getPipelineVertexInputState({vkglTF::VertexComponent::Position, vkglTF::VertexComponent::Normal, vkglTF::VertexComponent::Color});

		// Create the graphics pipeline state objects

		// Textured pipeline
		// Phong shading pipeline
		//shaderStages[0] = loadShader(getShadersPath() + "pipelines/phong.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
		//shaderStages[1] = loadShader(getShadersPath() + "pipelines/phong.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
		//VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.phong));

		pipelines.phong = compiledPipeline;

		// Toon shading pipeline
		shaderStages[0] = loadShader(getShadersPath() + "pipelines/toon.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
		shaderStages[1] = loadShader(getShadersPath() + "pipelines/toon.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.toon));

		// Pipeline for wire frame rendering
		// Non solid rendering is not a mandatory Vulkan feature
		if (deviceFeatures.fillModeNonSolid)
		{
			rasterizationState.polygonMode = VK_POLYGON_MODE_LINE;
			shaderStages[0] = loadShader(getShadersPath() + "pipelines/wireframe.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
			shaderStages[1] = loadShader(getShadersPath() + "pipelines/wireframe.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
			VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.wireframe));
		}
	}

	// Prepare and initialize uniform buffer containing shader uniforms
	void prepareUniformBuffers()
	{
		// Create the vertex shader uniform buffer block
		VK_CHECK_RESULT(vulkanDevice->createBuffer(
			VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
			VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
			&uniformBuffer,
			sizeof(uboVS)));

		// Map persistent
		VK_CHECK_RESULT(uniformBuffer.map());

		updateUniformBuffers();
	}

	void updateUniformBuffers()
	{
		uboVS.projection = camera.matrices.perspective;
		uboVS.modelView = camera.matrices.view;
		memcpy(uniformBuffer.mapped, &uboVS, sizeof(uboVS));
	}

	void draw()
	{
		VulkanExampleBase::prepareFrame();

		submitInfo.commandBufferCount = 1;
		submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
		VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));

		VulkanExampleBase::submitFrame();
	}

	void prepare()
	{
		VulkanExampleBase::prepare();
		loadAssets();
		prepareUniformBuffers();
		setupDescriptorSetLayout();
		preparePipelines();
		setupDescriptorPool();
		setupDescriptorSet();
		buildCommandBuffers();
		prepared = true;
	}

	virtual void render()
	{
		if (!prepared)
			return;
		draw();
		if (camera.updated) {
			updateUniformBuffers();
		}
	}

	virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
	{
		if (!deviceFeatures.fillModeNonSolid) {
			if (overlay->header("Info")) {
				overlay->text("Non solid fill modes not supported!");
			}
		}
	}
};

VULKAN_EXAMPLE_MAIN()