/*  PCSX2 - PS2 Emulator for PCs
 *  Copyright (C) 2002-2021  PCSX2 Dev Team
 *
 *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU Lesser General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 *  PURPOSE.  See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with PCSX2.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#include "common/Vulkan/Builders.h"
#include "common/Vulkan/Util.h"
#include "common/Assertions.h"
#include <limits>

namespace Vulkan
{
	DescriptorSetLayoutBuilder::DescriptorSetLayoutBuilder() { Clear(); }

	void DescriptorSetLayoutBuilder::Clear()
	{
		m_ci.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
		m_ci.pNext = nullptr;
		m_ci.flags = 0;
		m_ci.pBindings = nullptr;
		m_ci.bindingCount = 0;
	}

	VkDescriptorSetLayout DescriptorSetLayoutBuilder::Create(VkDevice device)
	{
		VkDescriptorSetLayout layout;
		VkResult res = vkCreateDescriptorSetLayout(device, &m_ci, nullptr, &layout);
		if (res != VK_SUCCESS)
		{
			LOG_VULKAN_ERROR(res, "vkCreateDescriptorSetLayout() failed: ");
			return VK_NULL_HANDLE;
		}

		Clear();
		return layout;
	}

	void DescriptorSetLayoutBuilder::AddBinding(
		u32 binding, VkDescriptorType dtype, u32 dcount, VkShaderStageFlags stages)
	{
		pxAssert(m_ci.bindingCount < MAX_BINDINGS);

		VkDescriptorSetLayoutBinding& b = m_bindings[m_ci.bindingCount];
		b.binding = binding;
		b.descriptorType = dtype;
		b.descriptorCount = dcount;
		b.stageFlags = stages;
		b.pImmutableSamplers = nullptr;

		m_ci.pBindings = m_bindings.data();
		m_ci.bindingCount++;
	}

	PipelineLayoutBuilder::PipelineLayoutBuilder() { Clear(); }

	void PipelineLayoutBuilder::Clear()
	{
		m_ci.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
		m_ci.pNext = nullptr;
		m_ci.flags = 0;
		m_ci.pSetLayouts = nullptr;
		m_ci.setLayoutCount = 0;
		m_ci.pPushConstantRanges = nullptr;
		m_ci.pushConstantRangeCount = 0;
	}

	VkPipelineLayout PipelineLayoutBuilder::Create(VkDevice device)
	{
		VkPipelineLayout layout;
		VkResult res = vkCreatePipelineLayout(device, &m_ci, nullptr, &layout);
		if (res != VK_SUCCESS)
		{
			LOG_VULKAN_ERROR(res, "vkCreatePipelineLayout() failed: ");
			return VK_NULL_HANDLE;
		}

		Clear();
		return layout;
	}

	void PipelineLayoutBuilder::AddDescriptorSet(VkDescriptorSetLayout layout)
	{
		pxAssert(m_ci.setLayoutCount < MAX_SETS);

		m_sets[m_ci.setLayoutCount] = layout;

		m_ci.setLayoutCount++;
		m_ci.pSetLayouts = m_sets.data();
	}

	void PipelineLayoutBuilder::AddPushConstants(VkShaderStageFlags stages, u32 offset, u32 size)
	{
		pxAssert(m_ci.pushConstantRangeCount < MAX_PUSH_CONSTANTS);

		VkPushConstantRange& r = m_push_constants[m_ci.pushConstantRangeCount];
		r.stageFlags = stages;
		r.offset = offset;
		r.size = size;

		m_ci.pushConstantRangeCount++;
		m_ci.pPushConstantRanges = m_push_constants.data();
	}

	GraphicsPipelineBuilder::GraphicsPipelineBuilder() { Clear(); }

	void GraphicsPipelineBuilder::Clear()
	{
		m_ci = {};
		m_ci.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;

		m_shader_stages = {};

		m_vertex_input_state = {};
		m_vertex_input_state.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
		m_ci.pVertexInputState = &m_vertex_input_state;
		m_vertex_attributes = {};
		m_vertex_buffers = {};

		m_input_assembly = {};
		m_input_assembly.sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO;

		m_rasterization_state = {};
		m_rasterization_state.sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO;
		m_rasterization_state.lineWidth = 1.0f;
		m_depth_state = {};
		m_depth_state.sType = VK_STRUCTURE_TYPE_PIPELINE_DEPTH_STENCIL_STATE_CREATE_INFO;
		m_blend_state = {};
		m_blend_state.sType = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO;
		m_blend_attachments = {};

		m_viewport_state = {};
		m_viewport_state.sType = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO;
		m_viewport = {};
		m_scissor = {};

		m_dynamic_state = {};
		m_dynamic_state.sType = VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO;
		m_dynamic_state_values = {};

		m_multisample_state = {};
		m_multisample_state.sType = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO;

		m_provoking_vertex = {};
		m_provoking_vertex.sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_PROVOKING_VERTEX_STATE_CREATE_INFO_EXT;

		// set defaults
		SetNoCullRasterizationState();
		SetNoDepthTestState();
		SetNoBlendingState();
		SetPrimitiveTopology(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST);

		// have to be specified even if dynamic
		SetViewport(0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f);
		SetScissorRect(0, 0, 1, 1);
		SetMultisamples(VK_SAMPLE_COUNT_1_BIT);
	}

	VkPipeline GraphicsPipelineBuilder::Create(VkDevice device, VkPipelineCache pipeline_cache, bool clear /* = true */)
	{
		VkPipeline pipeline;
		VkResult res = vkCreateGraphicsPipelines(device, pipeline_cache, 1, &m_ci, nullptr, &pipeline);
		if (res != VK_SUCCESS)
		{
			LOG_VULKAN_ERROR(res, "vkCreateGraphicsPipelines() failed: ");
			return VK_NULL_HANDLE;
		}

		if (clear)
			Clear();

		return pipeline;
	}

	void GraphicsPipelineBuilder::SetShaderStage(
		VkShaderStageFlagBits stage, VkShaderModule module, const char* entry_point)
	{
		pxAssert(m_ci.stageCount < MAX_SHADER_STAGES);

		u32 index = 0;
		for (; index < m_ci.stageCount; index++)
		{
			if (m_shader_stages[index].stage == stage)
				break;
		}
		if (index == m_ci.stageCount)
		{
			m_ci.stageCount++;
			m_ci.pStages = m_shader_stages.data();
		}

		VkPipelineShaderStageCreateInfo& s = m_shader_stages[index];
		s.sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
		s.stage = stage;
		s.module = module;
		s.pName = entry_point;
	}

	void GraphicsPipelineBuilder::AddVertexBuffer(
		u32 binding, u32 stride, VkVertexInputRate input_rate /*= VK_VERTEX_INPUT_RATE_VERTEX*/)
	{
		pxAssert(m_vertex_input_state.vertexAttributeDescriptionCount < MAX_VERTEX_BUFFERS);

		VkVertexInputBindingDescription& b = m_vertex_buffers[m_vertex_input_state.vertexBindingDescriptionCount];
		b.binding = binding;
		b.stride = stride;
		b.inputRate = input_rate;

		m_vertex_input_state.vertexBindingDescriptionCount++;
		m_vertex_input_state.pVertexBindingDescriptions = m_vertex_buffers.data();
		m_ci.pVertexInputState = &m_vertex_input_state;
	}

	void GraphicsPipelineBuilder::AddVertexAttribute(u32 location, u32 binding, VkFormat format, u32 offset)
	{
		pxAssert(m_vertex_input_state.vertexAttributeDescriptionCount < MAX_VERTEX_BUFFERS);

		VkVertexInputAttributeDescription& a =
			m_vertex_attributes[m_vertex_input_state.vertexAttributeDescriptionCount];
		a.location = location;
		a.binding = binding;
		a.format = format;
		a.offset = offset;

		m_vertex_input_state.vertexAttributeDescriptionCount++;
		m_vertex_input_state.pVertexAttributeDescriptions = m_vertex_attributes.data();
		m_ci.pVertexInputState = &m_vertex_input_state;
	}

	void GraphicsPipelineBuilder::SetPrimitiveTopology(
		VkPrimitiveTopology topology, bool enable_primitive_restart /*= false*/)
	{
		m_input_assembly.topology = topology;
		m_input_assembly.primitiveRestartEnable = enable_primitive_restart;

		m_ci.pInputAssemblyState = &m_input_assembly;
	}

	void GraphicsPipelineBuilder::SetRasterizationState(
		VkPolygonMode polygon_mode, VkCullModeFlags cull_mode, VkFrontFace front_face)
	{
		m_rasterization_state.polygonMode = polygon_mode;
		m_rasterization_state.cullMode = cull_mode;
		m_rasterization_state.frontFace = front_face;

		m_ci.pRasterizationState = &m_rasterization_state;
	}

	void GraphicsPipelineBuilder::SetLineWidth(float width) { m_rasterization_state.lineWidth = width; }

	void GraphicsPipelineBuilder::SetMultisamples(u32 multisamples, bool per_sample_shading)
	{
		m_multisample_state.rasterizationSamples = static_cast<VkSampleCountFlagBits>(multisamples);
		m_multisample_state.sampleShadingEnable = per_sample_shading;
		m_multisample_state.minSampleShading = (multisamples > 1) ? 1.0f : 0.0f;
	}

	void GraphicsPipelineBuilder::SetNoCullRasterizationState()
	{
		SetRasterizationState(VK_POLYGON_MODE_FILL, VK_CULL_MODE_NONE, VK_FRONT_FACE_CLOCKWISE);
	}

	void GraphicsPipelineBuilder::SetDepthState(bool depth_test, bool depth_write, VkCompareOp compare_op)
	{
		m_depth_state.depthTestEnable = depth_test;
		m_depth_state.depthWriteEnable = depth_write;
		m_depth_state.depthCompareOp = compare_op;

		m_ci.pDepthStencilState = &m_depth_state;
	}

	void GraphicsPipelineBuilder::SetStencilState(
		bool stencil_test, const VkStencilOpState& front, const VkStencilOpState& back)
	{
		m_depth_state.stencilTestEnable = stencil_test;
		m_depth_state.front = front;
		m_depth_state.back = back;
	}

	void GraphicsPipelineBuilder::SetNoStencilState()
	{
		m_depth_state.stencilTestEnable = VK_FALSE;
		m_depth_state.front = {};
		m_depth_state.back = {};
	}

	void GraphicsPipelineBuilder::SetNoDepthTestState() { SetDepthState(false, false, VK_COMPARE_OP_ALWAYS); }

	void GraphicsPipelineBuilder::SetBlendConstants(float r, float g, float b, float a)
	{
		m_blend_state.blendConstants[0] = r;
		m_blend_state.blendConstants[1] = g;
		m_blend_state.blendConstants[2] = b;
		m_blend_state.blendConstants[3] = a;
		m_ci.pColorBlendState = &m_blend_state;
	}

	void GraphicsPipelineBuilder::AddBlendAttachment(bool blend_enable, VkBlendFactor src_factor,
		VkBlendFactor dst_factor, VkBlendOp op, VkBlendFactor alpha_src_factor, VkBlendFactor alpha_dst_factor,
		VkBlendOp alpha_op,
		VkColorComponentFlags
			write_mask /* = VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT */)
	{
		pxAssert(m_blend_state.attachmentCount < MAX_ATTACHMENTS);

		VkPipelineColorBlendAttachmentState& bs = m_blend_attachments[m_blend_state.attachmentCount];
		bs.blendEnable = blend_enable;
		bs.srcColorBlendFactor = src_factor;
		bs.dstColorBlendFactor = dst_factor;
		bs.colorBlendOp = op;
		bs.srcAlphaBlendFactor = alpha_src_factor;
		bs.dstAlphaBlendFactor = alpha_dst_factor;
		bs.alphaBlendOp = alpha_op;
		bs.colorWriteMask = write_mask;

		m_blend_state.attachmentCount++;
		m_blend_state.pAttachments = m_blend_attachments.data();
		m_ci.pColorBlendState = &m_blend_state;
	}

	void GraphicsPipelineBuilder::SetBlendAttachment(u32 attachment, bool blend_enable, VkBlendFactor src_factor,
		VkBlendFactor dst_factor, VkBlendOp op, VkBlendFactor alpha_src_factor, VkBlendFactor alpha_dst_factor,
		VkBlendOp alpha_op,
		VkColorComponentFlags
			write_mask /*= VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT*/)
	{
		pxAssert(attachment < MAX_ATTACHMENTS);

		VkPipelineColorBlendAttachmentState& bs = m_blend_attachments[attachment];
		bs.blendEnable = blend_enable;
		bs.srcColorBlendFactor = src_factor;
		bs.dstColorBlendFactor = dst_factor;
		bs.colorBlendOp = op;
		bs.srcAlphaBlendFactor = alpha_src_factor;
		bs.dstAlphaBlendFactor = alpha_dst_factor;
		bs.alphaBlendOp = alpha_op;
		bs.colorWriteMask = write_mask;

		if (attachment >= m_blend_state.attachmentCount)
		{
			m_blend_state.attachmentCount = attachment + 1u;
			m_blend_state.pAttachments = m_blend_attachments.data();
			m_ci.pColorBlendState = &m_blend_state;
		}
	}

	void GraphicsPipelineBuilder::AddBlendFlags(u32 flags)
	{
		m_blend_state.flags |= flags;
	}

	void GraphicsPipelineBuilder::ClearBlendAttachments()
	{
		m_blend_attachments = {};
		m_blend_state.attachmentCount = 0;
	}

	void GraphicsPipelineBuilder::SetNoBlendingState()
	{
		ClearBlendAttachments();
		SetBlendAttachment(0, false, VK_BLEND_FACTOR_ONE, VK_BLEND_FACTOR_ZERO, VK_BLEND_OP_ADD, VK_BLEND_FACTOR_ONE,
			VK_BLEND_FACTOR_ZERO, VK_BLEND_OP_ADD,
			VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT);
	}

	void GraphicsPipelineBuilder::AddDynamicState(VkDynamicState state)
	{
		pxAssert(m_dynamic_state.dynamicStateCount < MAX_DYNAMIC_STATE);

		m_dynamic_state_values[m_dynamic_state.dynamicStateCount] = state;
		m_dynamic_state.dynamicStateCount++;
		m_dynamic_state.pDynamicStates = m_dynamic_state_values.data();
		m_ci.pDynamicState = &m_dynamic_state;
	}

	void GraphicsPipelineBuilder::SetDynamicViewportAndScissorState()
	{
		AddDynamicState(VK_DYNAMIC_STATE_VIEWPORT);
		AddDynamicState(VK_DYNAMIC_STATE_SCISSOR);
	}

	void GraphicsPipelineBuilder::SetViewport(
		float x, float y, float width, float height, float min_depth, float max_depth)
	{
		m_viewport.x = x;
		m_viewport.y = y;
		m_viewport.width = width;
		m_viewport.height = height;
		m_viewport.minDepth = min_depth;
		m_viewport.maxDepth = max_depth;

		m_viewport_state.pViewports = &m_viewport;
		m_viewport_state.viewportCount = 1u;
		m_ci.pViewportState = &m_viewport_state;
	}

	void GraphicsPipelineBuilder::SetScissorRect(s32 x, s32 y, u32 width, u32 height)
	{
		m_scissor.offset.x = x;
		m_scissor.offset.y = y;
		m_scissor.extent.width = width;
		m_scissor.extent.height = height;

		m_viewport_state.pScissors = &m_scissor;
		m_viewport_state.scissorCount = 1u;
		m_ci.pViewportState = &m_viewport_state;
	}

	void GraphicsPipelineBuilder::SetMultisamples(VkSampleCountFlagBits samples)
	{
		m_multisample_state.rasterizationSamples = samples;
		m_ci.pMultisampleState = &m_multisample_state;
	}

	void GraphicsPipelineBuilder::SetPipelineLayout(VkPipelineLayout layout) { m_ci.layout = layout; }

	void GraphicsPipelineBuilder::SetRenderPass(VkRenderPass render_pass, u32 subpass)
	{
		m_ci.renderPass = render_pass;
		m_ci.subpass = subpass;
	}

	void GraphicsPipelineBuilder::SetProvokingVertex(VkProvokingVertexModeEXT mode)
	{
		Util::AddPointerToChain(&m_rasterization_state, &m_provoking_vertex);

		m_provoking_vertex.provokingVertexMode = mode;
	}

	ComputePipelineBuilder::ComputePipelineBuilder() { Clear(); }

	void ComputePipelineBuilder::Clear()
	{
		m_ci = {};
		m_ci.sType = VK_STRUCTURE_TYPE_COMPUTE_PIPELINE_CREATE_INFO;
		m_si = {};
		m_smap_entries = {};
		m_smap_constants = {};
	}

	VkPipeline ComputePipelineBuilder::Create(VkDevice device, VkPipelineCache pipeline_cache /*= VK_NULL_HANDLE*/, bool clear /*= true*/)
	{
		VkPipeline pipeline;
		VkResult res = vkCreateComputePipelines(device, pipeline_cache, 1, &m_ci, nullptr, &pipeline);
		if (res != VK_SUCCESS)
		{
			LOG_VULKAN_ERROR(res, "vkCreateComputePipelines() failed: ");
			return VK_NULL_HANDLE;
		}

		if (clear)
			Clear();

		return pipeline;
	}

	void ComputePipelineBuilder::SetShader(VkShaderModule module, const char* entry_point)
	{
		m_ci.stage.sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
		m_ci.stage.stage = VK_SHADER_STAGE_COMPUTE_BIT;
		m_ci.stage.module = module;
		m_ci.stage.pName = entry_point;
	}

	void ComputePipelineBuilder::SetPipelineLayout(VkPipelineLayout layout)
	{
		m_ci.layout = layout;
	}

	void ComputePipelineBuilder::SetSpecializationBool(u32 index, bool value)
	{
		const u32 u32_value = static_cast<u32>(value);
		SetSpecializationValue(index, u32_value);
	}

	void ComputePipelineBuilder::SetSpecializationValue(u32 index, u32 value)
	{
		if (m_si.mapEntryCount == 0)
		{
			m_si.pMapEntries = m_smap_entries.data();
			m_si.pData = m_smap_constants.data();
			m_ci.stage.pSpecializationInfo = &m_si;
		}

		m_smap_entries[m_si.mapEntryCount++] = {index, index * SPECIALIZATION_CONSTANT_SIZE, SPECIALIZATION_CONSTANT_SIZE};
		m_si.dataSize += SPECIALIZATION_CONSTANT_SIZE;
	}

	SamplerBuilder::SamplerBuilder() { Clear(); }

	void SamplerBuilder::Clear()
	{
		m_ci = {};
		m_ci.sType = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO;
	}

	VkSampler SamplerBuilder::Create(VkDevice device, bool clear /* = true */)
	{
		VkSampler sampler;
		VkResult res = vkCreateSampler(device, &m_ci, nullptr, &sampler);
		if (res != VK_SUCCESS)
		{
			LOG_VULKAN_ERROR(res, "vkCreateSampler() failed: ");
			return VK_NULL_HANDLE;
		}

		return sampler;
	}

	void SamplerBuilder::SetFilter(VkFilter mag_filter, VkFilter min_filter, VkSamplerMipmapMode mip_filter)
	{
		m_ci.magFilter = mag_filter;
		m_ci.minFilter = min_filter;
		m_ci.mipmapMode = mip_filter;
	}

	void SamplerBuilder::SetAddressMode(VkSamplerAddressMode u, VkSamplerAddressMode v, VkSamplerAddressMode w)
	{
		m_ci.addressModeU = u;
		m_ci.addressModeV = v;
		m_ci.addressModeW = w;
	}

	void SamplerBuilder::SetPointSampler(
		VkSamplerAddressMode address_mode /* = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER */)
	{
		Clear();
		SetFilter(VK_FILTER_NEAREST, VK_FILTER_NEAREST, VK_SAMPLER_MIPMAP_MODE_NEAREST);
		SetAddressMode(address_mode, address_mode, address_mode);
	}

	void SamplerBuilder::SetLinearSampler(
		bool mipmaps, VkSamplerAddressMode address_mode /* = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER */)
	{
		Clear();
		SetFilter(VK_FILTER_LINEAR, VK_FILTER_LINEAR,
			mipmaps ? VK_SAMPLER_MIPMAP_MODE_LINEAR : VK_SAMPLER_MIPMAP_MODE_NEAREST);
		SetAddressMode(address_mode, address_mode, address_mode);

		if (mipmaps)
		{
			m_ci.minLod = std::numeric_limits<float>::min();
			m_ci.maxLod = std::numeric_limits<float>::max();
		}
	}

	DescriptorSetUpdateBuilder::DescriptorSetUpdateBuilder() { Clear(); }

	void DescriptorSetUpdateBuilder::Clear()
	{
		m_writes = {};
		m_num_writes = 0;
	}

	void DescriptorSetUpdateBuilder::Update(VkDevice device, bool clear /*= true*/)
	{
		pxAssert(m_num_writes > 0);

		vkUpdateDescriptorSets(device, m_num_writes, (m_num_writes > 0) ? m_writes.data() : nullptr, 0, nullptr);

		if (clear)
			Clear();
	}

	void DescriptorSetUpdateBuilder::AddImageDescriptorWrite(VkDescriptorSet set, u32 binding, VkImageView view,
		VkImageLayout layout /*= VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL*/)
	{
		pxAssert(m_num_writes < MAX_WRITES && m_num_image_infos < MAX_IMAGE_INFOS);

		VkDescriptorImageInfo& ii = m_image_infos[m_num_image_infos++];
		ii.imageView = view;
		ii.imageLayout = layout;
		ii.sampler = VK_NULL_HANDLE;

		VkWriteDescriptorSet& dw = m_writes[m_num_writes++];
		dw.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
		dw.dstSet = set;
		dw.dstBinding = binding;
		dw.descriptorCount = 1;
		dw.descriptorType = VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE;
		dw.pImageInfo = &ii;
	}


	void DescriptorSetUpdateBuilder::AddImageDescriptorWrites(VkDescriptorSet set, u32 binding,
		const VkImageView* views, u32 num_views, VkImageLayout layout /*= VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL*/)
	{
		pxAssert(m_num_writes < MAX_WRITES && (m_num_image_infos + num_views) < MAX_IMAGE_INFOS);

#if 1
		// NOTE: This is deliberately split up - updating multiple descriptors in one write is broken on Adreno.
		for (u32 i = 0; i < num_views; i++)
			AddImageDescriptorWrite(set, binding + i, views[i], layout);
#else
		VkWriteDescriptorSet& dw = m_writes[m_num_writes++];
		dw.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
		dw.dstSet = set;
		dw.dstBinding = binding;
		dw.descriptorCount = num_views;
		dw.descriptorType = VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE;
		dw.pImageInfo = &m_image_infos[m_num_image_infos];

		for (u32 i = 0; i < num_views; i++)
		{
			VkDescriptorImageInfo& ii = m_image_infos[m_num_image_infos++];
			ii.imageView = views[i];
			ii.imageLayout = layout;
			ii.sampler = VK_NULL_HANDLE;
		}
#endif
	}

	void DescriptorSetUpdateBuilder::AddSamplerDescriptorWrite(VkDescriptorSet set, u32 binding, VkSampler sampler)
	{
		pxAssert(m_num_writes < MAX_WRITES && m_num_image_infos < MAX_IMAGE_INFOS);

		VkDescriptorImageInfo& ii = m_image_infos[m_num_image_infos++];
		ii.imageView = VK_NULL_HANDLE;
		ii.imageLayout = VK_IMAGE_LAYOUT_UNDEFINED;
		ii.sampler = sampler;

		VkWriteDescriptorSet& dw = m_writes[m_num_writes++];
		dw.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
		dw.dstSet = set;
		dw.dstBinding = binding;
		dw.descriptorCount = 1;
		dw.descriptorType = VK_DESCRIPTOR_TYPE_SAMPLER;
		dw.pImageInfo = &ii;
	}


	void DescriptorSetUpdateBuilder::AddSamplerDescriptorWrites(
		VkDescriptorSet set, u32 binding, const VkSampler* samplers, u32 num_samplers)
	{
		pxAssert(m_num_writes < MAX_WRITES && (m_num_image_infos + num_samplers) < MAX_IMAGE_INFOS);

		VkWriteDescriptorSet& dw = m_writes[m_num_writes++];
		dw.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
		dw.dstSet = set;
		dw.dstBinding = binding;
		dw.descriptorCount = num_samplers;
		dw.descriptorType = VK_DESCRIPTOR_TYPE_SAMPLER;
		dw.pImageInfo = &m_image_infos[m_num_image_infos];

		for (u32 i = 0; i < num_samplers; i++)
		{
			VkDescriptorImageInfo& ii = m_image_infos[m_num_image_infos++];
			ii.imageView = VK_NULL_HANDLE;
			ii.imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
			ii.sampler = samplers[i];
		}
	}

	void DescriptorSetUpdateBuilder::AddCombinedImageSamplerDescriptorWrite(VkDescriptorSet set, u32 binding,
		VkImageView view, VkSampler sampler, VkImageLayout layout /*= VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL*/)
	{
		pxAssert(m_num_writes < MAX_WRITES && m_num_image_infos < MAX_IMAGE_INFOS);

		VkDescriptorImageInfo& ii = m_image_infos[m_num_image_infos++];
		ii.imageView = view;
		ii.imageLayout = layout;
		ii.sampler = sampler;

		VkWriteDescriptorSet& dw = m_writes[m_num_writes++];
		dw.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
		dw.dstSet = set;
		dw.dstBinding = binding;
		dw.descriptorCount = 1;
		dw.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
		dw.pImageInfo = &ii;
	}

	void DescriptorSetUpdateBuilder::AddCombinedImageSamplerDescriptorWrites(VkDescriptorSet set, u32 binding,
		const VkImageView* views, const VkSampler* samplers, u32 num_views,
		VkImageLayout layout /* = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL */)
	{
		pxAssert(m_num_writes < MAX_WRITES && (m_num_image_infos + num_views) < MAX_IMAGE_INFOS);

#if 1
		// NOTE: This is deliberately split up - updating multiple descriptors in one write is broken on Adreno.
		for (u32 i = 0; i < num_views; i++)
			AddCombinedImageSamplerDescriptorWrite(set, binding + i, views[i], samplers[i], layout);
#else
		VkWriteDescriptorSet& dw = m_writes[m_num_writes++];
		dw.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
		dw.dstSet = set;
		dw.dstBinding = binding;
		dw.descriptorCount = num_views;
		dw.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
		dw.pImageInfo = &m_image_infos[m_num_image_infos];

		for (u32 i = 0; i < num_views; i++)
		{
			VkDescriptorImageInfo& ii = m_image_infos[m_num_image_infos++];
			ii.imageView = views[i];
			ii.sampler = samplers[i];
			ii.imageLayout = layout;
		}
#endif
	}

	void DescriptorSetUpdateBuilder::AddBufferDescriptorWrite(
		VkDescriptorSet set, u32 binding, VkDescriptorType dtype, VkBuffer buffer, u32 offset, u32 size)
	{
		pxAssert(m_num_writes < MAX_WRITES && m_num_buffer_infos < MAX_BUFFER_INFOS);

		VkDescriptorBufferInfo& bi = m_buffer_infos[m_num_buffer_infos++];
		bi.buffer = buffer;
		bi.offset = offset;
		bi.range = size;

		VkWriteDescriptorSet& dw = m_writes[m_num_writes++];
		dw.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
		dw.dstSet = set;
		dw.dstBinding = binding;
		dw.descriptorCount = 1;
		dw.descriptorType = dtype;
		dw.pBufferInfo = &bi;
	}

	void DescriptorSetUpdateBuilder::AddBufferViewDescriptorWrite(
		VkDescriptorSet set, u32 binding, VkDescriptorType dtype, VkBufferView view)
	{
		pxAssert(m_num_writes < MAX_WRITES && m_num_views < MAX_VIEWS);

		VkBufferView& bi = m_views[m_num_views++];
		bi = view;

		VkWriteDescriptorSet& dw = m_writes[m_num_writes++];
		dw.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
		dw.dstSet = set;
		dw.dstBinding = binding;
		dw.descriptorCount = 1;
		dw.descriptorType = dtype;
		dw.pTexelBufferView = &bi;
	}

	void DescriptorSetUpdateBuilder::AddInputAttachmentDescriptorWrite(
		VkDescriptorSet set, u32 binding, VkImageView view, VkImageLayout layout /*= VK_IMAGE_LAYOUT_GENERAL*/)
	{
		pxAssert(m_num_writes < MAX_WRITES && m_num_image_infos < MAX_IMAGE_INFOS);

		VkWriteDescriptorSet& dw = m_writes[m_num_writes++];
		dw.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
		dw.dstSet = set;
		dw.dstBinding = binding;
		dw.descriptorCount = 1;
		dw.descriptorType = VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT;
		dw.pImageInfo = &m_image_infos[m_num_image_infos];

		VkDescriptorImageInfo& ii = m_image_infos[m_num_image_infos++];
		ii.imageView = view;
		ii.imageLayout = layout;
		ii.sampler = VK_NULL_HANDLE;
	}

	void DescriptorSetUpdateBuilder::AddStorageImageDescriptorWrite(
		VkDescriptorSet set, u32 binding, VkImageView view, VkImageLayout layout /*= VK_IMAGE_LAYOUT_GENERAL*/)
	{
		pxAssert(m_num_writes < MAX_WRITES && m_num_image_infos < MAX_IMAGE_INFOS);

		VkWriteDescriptorSet& dw = m_writes[m_num_writes++];
		dw.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
		dw.dstSet = set;
		dw.dstBinding = binding;
		dw.descriptorCount = 1;
		dw.descriptorType = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE;
		dw.pImageInfo = &m_image_infos[m_num_image_infos];

		VkDescriptorImageInfo& ii = m_image_infos[m_num_image_infos++];
		ii.imageView = view;
		ii.imageLayout = layout;
		ii.sampler = VK_NULL_HANDLE;
	}

	FramebufferBuilder::FramebufferBuilder() { Clear(); }

	void FramebufferBuilder::Clear()
	{
		m_ci = {};
		m_ci.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
		m_images = {};
	}

	VkFramebuffer FramebufferBuilder::Create(VkDevice device, bool clear /*= true*/)
	{
		VkFramebuffer fb;
		VkResult res = vkCreateFramebuffer(device, &m_ci, nullptr, &fb);
		if (res != VK_SUCCESS)
		{
			LOG_VULKAN_ERROR(res, "vkCreateFramebuffer() failed: ");
			return VK_NULL_HANDLE;
		}

		if (clear)
			Clear();

		return fb;
	}

	void FramebufferBuilder::AddAttachment(VkImageView image)
	{
		pxAssert(m_ci.attachmentCount < MAX_ATTACHMENTS);

		m_images[m_ci.attachmentCount] = image;

		m_ci.attachmentCount++;
		m_ci.pAttachments = m_images.data();
	}

	void FramebufferBuilder::SetSize(u32 width, u32 height, u32 layers)
	{
		m_ci.width = width;
		m_ci.height = height;
		m_ci.layers = layers;
	}

	void FramebufferBuilder::SetRenderPass(VkRenderPass render_pass) { m_ci.renderPass = render_pass; }

	RenderPassBuilder::RenderPassBuilder() { Clear(); }

	void RenderPassBuilder::Clear()
	{
		m_ci = {};
		m_ci.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
		m_attachments = {};
		m_attachment_references = {};
		m_num_attachment_references = 0;
		m_subpasses = {};
	}

	VkRenderPass RenderPassBuilder::Create(VkDevice device, bool clear /*= true*/)
	{
		VkRenderPass rp;
		VkResult res = vkCreateRenderPass(device, &m_ci, nullptr, &rp);
		if (res != VK_SUCCESS)
		{
			LOG_VULKAN_ERROR(res, "vkCreateRenderPass() failed: ");
			return VK_NULL_HANDLE;
		}

		return rp;
	}

	u32 RenderPassBuilder::AddAttachment(VkFormat format, VkSampleCountFlagBits samples, VkAttachmentLoadOp load_op,
		VkAttachmentStoreOp store_op, VkImageLayout initial_layout, VkImageLayout final_layout)
	{
		pxAssert(m_ci.attachmentCount < MAX_ATTACHMENTS);

		const u32 index = m_ci.attachmentCount;
		VkAttachmentDescription& ad = m_attachments[index];
		ad.format = format;
		ad.samples = samples;
		ad.loadOp = load_op;
		ad.storeOp = store_op;
		ad.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
		ad.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
		ad.initialLayout = initial_layout;
		ad.finalLayout = final_layout;

		m_ci.attachmentCount++;
		m_ci.pAttachments = m_attachments.data();

		return index;
	}

	u32 RenderPassBuilder::AddSubpass()
	{
		pxAssert(m_ci.subpassCount < MAX_SUBPASSES);

		const u32 index = m_ci.subpassCount;
		VkSubpassDescription& sp = m_subpasses[index];
		sp.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;

		m_ci.subpassCount++;
		m_ci.pSubpasses = m_subpasses.data();

		return index;
	}

	void RenderPassBuilder::AddSubpassColorAttachment(u32 subpass, u32 attachment, VkImageLayout layout)
	{
		pxAssert(subpass < m_ci.subpassCount && m_num_attachment_references < MAX_ATTACHMENT_REFERENCES);

		VkAttachmentReference& ar = m_attachment_references[m_num_attachment_references++];
		ar.attachment = attachment;
		ar.layout = layout;

		VkSubpassDescription& sp = m_subpasses[subpass];
		if (sp.colorAttachmentCount == 0)
			sp.pColorAttachments = &ar;
		sp.colorAttachmentCount++;
	}

	void RenderPassBuilder::AddSubpassDepthAttachment(u32 subpass, u32 attachment, VkImageLayout layout)
	{
		pxAssert(subpass < m_ci.subpassCount && m_num_attachment_references < MAX_ATTACHMENT_REFERENCES);

		VkAttachmentReference& ar = m_attachment_references[m_num_attachment_references++];
		ar.attachment = attachment;
		ar.layout = layout;

		VkSubpassDescription& sp = m_subpasses[subpass];
		sp.pDepthStencilAttachment = &ar;
	}

	BufferViewBuilder::BufferViewBuilder() { Clear(); }

	void BufferViewBuilder::Clear()
	{
		m_ci = {};
		m_ci.sType = VK_STRUCTURE_TYPE_BUFFER_VIEW_CREATE_INFO;
	}

	VkBufferView BufferViewBuilder::Create(VkDevice device, bool clear /*= true*/)
	{
		VkBufferView bv;
		VkResult res = vkCreateBufferView(device, &m_ci, nullptr, &bv);
		if (res != VK_SUCCESS)
		{
			LOG_VULKAN_ERROR(res, "vkCreateBufferView() failed: ");
			return VK_NULL_HANDLE;
		}

		return bv;
	}

	void BufferViewBuilder::Set(VkBuffer buffer, VkFormat format, u32 offset, u32 size)
	{
		m_ci.buffer = buffer;
		m_ci.format = format;
		m_ci.offset = offset;
		m_ci.range = size;
	}
} // namespace Vulkan