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deferred.cpp
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/*
* Vulkan Example - Deferred shading with multiple render targets (aka G-Buffer) example
*
* Copyright (C) 2016 by Sascha Willems - www.saschawillems.de
*
* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <vector>
#define GLM_FORCE_RADIANS
#define GLM_FORCE_DEPTH_ZERO_TO_ONE
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <vulkan/vulkan.h>
#include "vulkanexamplebase.h"
#include "VulkanBuffer.hpp"
#include "VulkanTexture.hpp"
#include "VulkanModel.hpp"
#define VERTEX_BUFFER_BIND_ID 0
#define ENABLE_VALIDATION false
// Texture properties
#define TEX_DIM 2048
#define TEX_FILTER VK_FILTER_LINEAR
// Offscreen frame buffer properties
#define FB_DIM TEX_DIM
class VulkanExample : public VulkanExampleBase
{
public:
bool debugDisplay = false;
struct {
struct {
vks::Texture2D colorMap;
vks::Texture2D normalMap;
} model;
struct {
vks::Texture2D colorMap;
vks::Texture2D normalMap;
} floor;
} textures;
// Vertex layout for the models
vks::VertexLayout vertexLayout = vks::VertexLayout({
vks::VERTEX_COMPONENT_POSITION,
vks::VERTEX_COMPONENT_UV,
vks::VERTEX_COMPONENT_COLOR,
vks::VERTEX_COMPONENT_NORMAL,
vks::VERTEX_COMPONENT_TANGENT,
});
struct {
vks::Model model;
vks::Model floor;
vks::Model quad;
} models;
struct {
VkPipelineVertexInputStateCreateInfo inputState;
std::vector<VkVertexInputBindingDescription> bindingDescriptions;
std::vector<VkVertexInputAttributeDescription> attributeDescriptions;
} vertices;
struct {
glm::mat4 projection;
glm::mat4 model;
glm::mat4 view;
glm::vec4 instancePos[3];
} uboVS, uboOffscreenVS;
struct Light {
glm::vec4 position;
glm::vec3 color;
float radius;
};
struct {
Light lights[6];
glm::vec4 viewPos;
} uboFragmentLights;
struct {
vks::Buffer vsFullScreen;
vks::Buffer vsOffscreen;
vks::Buffer fsLights;
} uniformBuffers;
struct {
VkPipeline deferred;
VkPipeline offscreen;
VkPipeline debug;
} pipelines;
struct {
VkPipelineLayout deferred;
VkPipelineLayout offscreen;
} pipelineLayouts;
struct {
VkDescriptorSet model;
VkDescriptorSet floor;
} descriptorSets;
VkDescriptorSet descriptorSet;
VkDescriptorSetLayout descriptorSetLayout;
// Framebuffer for offscreen rendering
struct FrameBufferAttachment {
VkImage image;
VkDeviceMemory mem;
VkImageView view;
VkFormat format;
};
struct FrameBuffer {
int32_t width, height;
VkFramebuffer frameBuffer;
FrameBufferAttachment position, normal, albedo;
FrameBufferAttachment depth;
VkRenderPass renderPass;
} offScreenFrameBuf;
// One sampler for the frame buffer color attachments
VkSampler colorSampler;
VkCommandBuffer offScreenCmdBuffer = VK_NULL_HANDLE;
// Semaphore used to synchronize between offscreen and final scene rendering
VkSemaphore offscreenSemaphore = VK_NULL_HANDLE;
VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
{
title = "Deferred shading (2016 by Sascha Willems)";
camera.type = Camera::CameraType::firstperson;
camera.movementSpeed = 5.0f;
#ifndef __ANDROID__
camera.rotationSpeed = 0.25f;
#endif
camera.position = { 2.15f, 0.3f, -8.75f };
camera.setRotation(glm::vec3(-0.75f, 12.5f, 0.0f));
camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 256.0f);
settings.overlay = true;
}
~VulkanExample()
{
// Clean up used Vulkan resources
// Note : Inherited destructor cleans up resources stored in base class
vkDestroySampler(device, colorSampler, nullptr);
// Frame buffer
// Color attachments
vkDestroyImageView(device, offScreenFrameBuf.position.view, nullptr);
vkDestroyImage(device, offScreenFrameBuf.position.image, nullptr);
vkFreeMemory(device, offScreenFrameBuf.position.mem, nullptr);
vkDestroyImageView(device, offScreenFrameBuf.normal.view, nullptr);
vkDestroyImage(device, offScreenFrameBuf.normal.image, nullptr);
vkFreeMemory(device, offScreenFrameBuf.normal.mem, nullptr);
vkDestroyImageView(device, offScreenFrameBuf.albedo.view, nullptr);
vkDestroyImage(device, offScreenFrameBuf.albedo.image, nullptr);
vkFreeMemory(device, offScreenFrameBuf.albedo.mem, nullptr);
// Depth attachment
vkDestroyImageView(device, offScreenFrameBuf.depth.view, nullptr);
vkDestroyImage(device, offScreenFrameBuf.depth.image, nullptr);
vkFreeMemory(device, offScreenFrameBuf.depth.mem, nullptr);
vkDestroyFramebuffer(device, offScreenFrameBuf.frameBuffer, nullptr);
vkDestroyPipeline(device, pipelines.deferred, nullptr);
vkDestroyPipeline(device, pipelines.offscreen, nullptr);
vkDestroyPipeline(device, pipelines.debug, nullptr);
vkDestroyPipelineLayout(device, pipelineLayouts.deferred, nullptr);
vkDestroyPipelineLayout(device, pipelineLayouts.offscreen, nullptr);
vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
// Meshes
models.model.destroy();
models.floor.destroy();
models.quad.destroy();
// Uniform buffers
uniformBuffers.vsOffscreen.destroy();
uniformBuffers.vsFullScreen.destroy();
uniformBuffers.fsLights.destroy();
vkFreeCommandBuffers(device, cmdPool, 1, &offScreenCmdBuffer);
vkDestroyRenderPass(device, offScreenFrameBuf.renderPass, nullptr);
textures.model.colorMap.destroy();
textures.model.normalMap.destroy();
textures.floor.colorMap.destroy();
textures.floor.normalMap.destroy();
vkDestroySemaphore(device, offscreenSemaphore, nullptr);
}
// Enable physical device features required for this example
virtual void getEnabledFeatures()
{
// Enable anisotropic filtering if supported
if (deviceFeatures.samplerAnisotropy) {
enabledFeatures.samplerAnisotropy = VK_TRUE;
}
// Enable texture compression
if (deviceFeatures.textureCompressionBC) {
enabledFeatures.textureCompressionBC = VK_TRUE;
}
else if (deviceFeatures.textureCompressionASTC_LDR) {
enabledFeatures.textureCompressionASTC_LDR = VK_TRUE;
}
else if (deviceFeatures.textureCompressionETC2) {
enabledFeatures.textureCompressionETC2 = VK_TRUE;
}
};
// Create a frame buffer attachment
void createAttachment(
VkFormat format,
VkImageUsageFlagBits usage,
FrameBufferAttachment *attachment)
{
VkImageAspectFlags aspectMask = 0;
VkImageLayout imageLayout;
attachment->format = format;
if (usage & VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT)
{
aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
imageLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
}
if (usage & VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT)
{
aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT;
imageLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
}
assert(aspectMask > 0);
VkImageCreateInfo image = vks::initializers::imageCreateInfo();
image.imageType = VK_IMAGE_TYPE_2D;
image.format = format;
image.extent.width = offScreenFrameBuf.width;
image.extent.height = offScreenFrameBuf.height;
image.extent.depth = 1;
image.mipLevels = 1;
image.arrayLayers = 1;
image.samples = VK_SAMPLE_COUNT_1_BIT;
image.tiling = VK_IMAGE_TILING_OPTIMAL;
image.usage = usage | VK_IMAGE_USAGE_SAMPLED_BIT;
VkMemoryAllocateInfo memAlloc = vks::initializers::memoryAllocateInfo();
VkMemoryRequirements memReqs;
VK_CHECK_RESULT(vkCreateImage(device, &image, nullptr, &attachment->image));
vkGetImageMemoryRequirements(device, attachment->image, &memReqs);
memAlloc.allocationSize = memReqs.size;
memAlloc.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &attachment->mem));
VK_CHECK_RESULT(vkBindImageMemory(device, attachment->image, attachment->mem, 0));
VkImageViewCreateInfo imageView = vks::initializers::imageViewCreateInfo();
imageView.viewType = VK_IMAGE_VIEW_TYPE_2D;
imageView.format = format;
imageView.subresourceRange = {};
imageView.subresourceRange.aspectMask = aspectMask;
imageView.subresourceRange.baseMipLevel = 0;
imageView.subresourceRange.levelCount = 1;
imageView.subresourceRange.baseArrayLayer = 0;
imageView.subresourceRange.layerCount = 1;
imageView.image = attachment->image;
VK_CHECK_RESULT(vkCreateImageView(device, &imageView, nullptr, &attachment->view));
}
// Prepare a new framebuffer and attachments for offscreen rendering (G-Buffer)
void prepareOffscreenFramebuffer()
{
offScreenFrameBuf.width = FB_DIM;
offScreenFrameBuf.height = FB_DIM;
// Color attachments
// (World space) Positions
createAttachment(
VK_FORMAT_R16G16B16A16_SFLOAT,
VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
&offScreenFrameBuf.position);
// (World space) Normals
createAttachment(
VK_FORMAT_R16G16B16A16_SFLOAT,
VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
&offScreenFrameBuf.normal);
// Albedo (color)
createAttachment(
VK_FORMAT_R8G8B8A8_UNORM,
VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
&offScreenFrameBuf.albedo);
// Depth attachment
// Find a suitable depth format
VkFormat attDepthFormat;
VkBool32 validDepthFormat = vks::tools::getSupportedDepthFormat(physicalDevice, &attDepthFormat);
assert(validDepthFormat);
createAttachment(
attDepthFormat,
VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT,
&offScreenFrameBuf.depth);
// Set up separate renderpass with references to the color and depth attachments
std::array<VkAttachmentDescription, 4> attachmentDescs = {};
// Init attachment properties
for (uint32_t i = 0; i < 4; ++i)
{
attachmentDescs[i].samples = VK_SAMPLE_COUNT_1_BIT;
attachmentDescs[i].loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attachmentDescs[i].storeOp = VK_ATTACHMENT_STORE_OP_STORE;
attachmentDescs[i].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
attachmentDescs[i].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
if (i == 3)
{
attachmentDescs[i].initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
attachmentDescs[i].finalLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
}
else
{
attachmentDescs[i].initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
attachmentDescs[i].finalLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
}
}
// Formats
attachmentDescs[0].format = offScreenFrameBuf.position.format;
attachmentDescs[1].format = offScreenFrameBuf.normal.format;
attachmentDescs[2].format = offScreenFrameBuf.albedo.format;
attachmentDescs[3].format = offScreenFrameBuf.depth.format;
std::vector<VkAttachmentReference> colorReferences;
colorReferences.push_back({ 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL });
colorReferences.push_back({ 1, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL });
colorReferences.push_back({ 2, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL });
VkAttachmentReference depthReference = {};
depthReference.attachment = 3;
depthReference.layout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
VkSubpassDescription subpass = {};
subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
subpass.pColorAttachments = colorReferences.data();
subpass.colorAttachmentCount = static_cast<uint32_t>(colorReferences.size());
subpass.pDepthStencilAttachment = &depthReference;
// Use subpass dependencies for attachment layput transitions
std::array<VkSubpassDependency, 2> dependencies;
dependencies[0].srcSubpass = VK_SUBPASS_EXTERNAL;
dependencies[0].dstSubpass = 0;
dependencies[0].srcStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
dependencies[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependencies[0].srcAccessMask = VK_ACCESS_MEMORY_READ_BIT;
dependencies[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
dependencies[0].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
dependencies[1].srcSubpass = 0;
dependencies[1].dstSubpass = VK_SUBPASS_EXTERNAL;
dependencies[1].srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependencies[1].dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
dependencies[1].srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
dependencies[1].dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
dependencies[1].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
VkRenderPassCreateInfo renderPassInfo = {};
renderPassInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
renderPassInfo.pAttachments = attachmentDescs.data();
renderPassInfo.attachmentCount = static_cast<uint32_t>(attachmentDescs.size());
renderPassInfo.subpassCount = 1;
renderPassInfo.pSubpasses = &subpass;
renderPassInfo.dependencyCount = 2;
renderPassInfo.pDependencies = dependencies.data();
VK_CHECK_RESULT(vkCreateRenderPass(device, &renderPassInfo, nullptr, &offScreenFrameBuf.renderPass));
std::array<VkImageView,4> attachments;
attachments[0] = offScreenFrameBuf.position.view;
attachments[1] = offScreenFrameBuf.normal.view;
attachments[2] = offScreenFrameBuf.albedo.view;
attachments[3] = offScreenFrameBuf.depth.view;
VkFramebufferCreateInfo fbufCreateInfo = {};
fbufCreateInfo.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
fbufCreateInfo.pNext = NULL;
fbufCreateInfo.renderPass = offScreenFrameBuf.renderPass;
fbufCreateInfo.pAttachments = attachments.data();
fbufCreateInfo.attachmentCount = static_cast<uint32_t>(attachments.size());
fbufCreateInfo.width = offScreenFrameBuf.width;
fbufCreateInfo.height = offScreenFrameBuf.height;
fbufCreateInfo.layers = 1;
VK_CHECK_RESULT(vkCreateFramebuffer(device, &fbufCreateInfo, nullptr, &offScreenFrameBuf.frameBuffer));
// Create sampler to sample from the color attachments
VkSamplerCreateInfo sampler = vks::initializers::samplerCreateInfo();
sampler.magFilter = VK_FILTER_NEAREST;
sampler.minFilter = VK_FILTER_NEAREST;
sampler.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
sampler.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
sampler.addressModeV = sampler.addressModeU;
sampler.addressModeW = sampler.addressModeU;
sampler.mipLodBias = 0.0f;
sampler.maxAnisotropy = 1.0f;
sampler.minLod = 0.0f;
sampler.maxLod = 1.0f;
sampler.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
VK_CHECK_RESULT(vkCreateSampler(device, &sampler, nullptr, &colorSampler));
}
// Build command buffer for rendering the scene to the offscreen frame buffer attachments
void buildDeferredCommandBuffer()
{
if (offScreenCmdBuffer == VK_NULL_HANDLE)
{
offScreenCmdBuffer = VulkanExampleBase::createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, false);
}
// Create a semaphore used to synchronize offscreen rendering and usage
VkSemaphoreCreateInfo semaphoreCreateInfo = vks::initializers::semaphoreCreateInfo();
VK_CHECK_RESULT(vkCreateSemaphore(device, &semaphoreCreateInfo, nullptr, &offscreenSemaphore));
VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
// Clear values for all attachments written in the fragment sahder
std::array<VkClearValue,4> clearValues;
clearValues[0].color = { { 0.0f, 0.0f, 0.0f, 0.0f } };
clearValues[1].color = { { 0.0f, 0.0f, 0.0f, 0.0f } };
clearValues[2].color = { { 0.0f, 0.0f, 0.0f, 0.0f } };
clearValues[3].depthStencil = { 1.0f, 0 };
VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
renderPassBeginInfo.renderPass = offScreenFrameBuf.renderPass;
renderPassBeginInfo.framebuffer = offScreenFrameBuf.frameBuffer;
renderPassBeginInfo.renderArea.extent.width = offScreenFrameBuf.width;
renderPassBeginInfo.renderArea.extent.height = offScreenFrameBuf.height;
renderPassBeginInfo.clearValueCount = static_cast<uint32_t>(clearValues.size());
renderPassBeginInfo.pClearValues = clearValues.data();
VK_CHECK_RESULT(vkBeginCommandBuffer(offScreenCmdBuffer, &cmdBufInfo));
vkCmdBeginRenderPass(offScreenCmdBuffer, &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
VkViewport viewport = vks::initializers::viewport((float)offScreenFrameBuf.width, (float)offScreenFrameBuf.height, 0.0f, 1.0f);
vkCmdSetViewport(offScreenCmdBuffer, 0, 1, &viewport);
VkRect2D scissor = vks::initializers::rect2D(offScreenFrameBuf.width, offScreenFrameBuf.height, 0, 0);
vkCmdSetScissor(offScreenCmdBuffer, 0, 1, &scissor);
vkCmdBindPipeline(offScreenCmdBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.offscreen);
VkDeviceSize offsets[1] = { 0 };
// Background
vkCmdBindDescriptorSets(offScreenCmdBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts.offscreen, 0, 1, &descriptorSets.floor, 0, NULL);
vkCmdBindVertexBuffers(offScreenCmdBuffer, VERTEX_BUFFER_BIND_ID, 1, &models.floor.vertices.buffer, offsets);
vkCmdBindIndexBuffer(offScreenCmdBuffer, models.floor.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(offScreenCmdBuffer, models.floor.indexCount, 1, 0, 0, 0);
// Object
vkCmdBindDescriptorSets(offScreenCmdBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts.offscreen, 0, 1, &descriptorSets.model, 0, NULL);
vkCmdBindVertexBuffers(offScreenCmdBuffer, VERTEX_BUFFER_BIND_ID, 1, &models.model.vertices.buffer, offsets);
vkCmdBindIndexBuffer(offScreenCmdBuffer, models.model.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(offScreenCmdBuffer, models.model.indexCount, 3, 0, 0, 0);
vkCmdEndRenderPass(offScreenCmdBuffer);
VK_CHECK_RESULT(vkEndCommandBuffer(offScreenCmdBuffer));
}
void loadAssets()
{
models.model.loadFromFile(getAssetPath() + "models/armor/armor.dae", vertexLayout, 1.0f, vulkanDevice, queue);
vks::ModelCreateInfo modelCreateInfo;
modelCreateInfo.scale = glm::vec3(2.0f);
modelCreateInfo.uvscale = glm::vec2(4.0f);
modelCreateInfo.center = glm::vec3(0.0f, 2.35f, 0.0f);
models.floor.loadFromFile(getAssetPath() + "models/plane.obj", vertexLayout, &modelCreateInfo, vulkanDevice, queue);
// Textures
std::string texFormatSuffix;
VkFormat texFormat;
// Get supported compressed texture format
if (vulkanDevice->features.textureCompressionBC) {
texFormatSuffix = "_bc3_unorm";
texFormat = VK_FORMAT_BC3_UNORM_BLOCK;
}
else if (vulkanDevice->features.textureCompressionASTC_LDR) {
texFormatSuffix = "_astc_8x8_unorm";
texFormat = VK_FORMAT_ASTC_8x8_UNORM_BLOCK;
}
else if (vulkanDevice->features.textureCompressionETC2) {
texFormatSuffix = "_etc2_unorm";
texFormat = VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK;
}
else {
vks::tools::exitFatal("Device does not support any compressed texture format!", VK_ERROR_FEATURE_NOT_PRESENT);
}
textures.model.colorMap.loadFromFile(getAssetPath() + "models/armor/color" + texFormatSuffix + ".ktx", texFormat, vulkanDevice, queue);
textures.model.normalMap.loadFromFile(getAssetPath() + "models/armor/normal" + texFormatSuffix + ".ktx", texFormat, vulkanDevice, queue);
textures.floor.colorMap.loadFromFile(getAssetPath() + "textures/stonefloor01_color" + texFormatSuffix + ".ktx", texFormat, vulkanDevice, queue);
textures.floor.normalMap.loadFromFile(getAssetPath() + "textures/stonefloor01_normal" + texFormatSuffix + ".ktx", texFormat, vulkanDevice, queue);
}
void reBuildCommandBuffers()
{
if (!checkCommandBuffers())
{
destroyCommandBuffers();
createCommandBuffers();
}
buildCommandBuffers();
}
void buildCommandBuffers()
{
VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
VkClearValue clearValues[2];
clearValues[0].color = { { 0.0f, 0.0f, 0.2f, 0.0f } };
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);
VkDeviceSize offsets[1] = { 0 };
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts.deferred, 0, 1, &descriptorSet, 0, NULL);
if (debugDisplay)
{
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.debug);
vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &models.quad.vertices.buffer, offsets);
vkCmdBindIndexBuffer(drawCmdBuffers[i], models.quad.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(drawCmdBuffers[i], models.quad.indexCount, 1, 0, 0, 1);
// Move viewport to display final composition in lower right corner
viewport.x = viewport.width * 0.5f;
viewport.y = viewport.height * 0.5f;
viewport.width = viewport.width * 0.5f;
viewport.height = viewport.height * 0.5f;
vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
}
// Final composition as full screen quad
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.deferred);
vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &models.quad.vertices.buffer, offsets);
vkCmdBindIndexBuffer(drawCmdBuffers[i], models.quad.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(drawCmdBuffers[i], 6, 1, 0, 0, 1);
drawUI(drawCmdBuffers[i]);
vkCmdEndRenderPass(drawCmdBuffers[i]);
VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
}
}
void generateQuads()
{
// Setup vertices for multiple screen aligned quads
// Used for displaying final result and debug
struct Vertex {
float pos[3];
float uv[2];
float col[3];
float normal[3];
float tangent[3];
};
std::vector<Vertex> vertexBuffer;
float x = 0.0f;
float y = 0.0f;
for (uint32_t i = 0; i < 3; i++)
{
// Last component of normal is used for debug display sampler index
vertexBuffer.push_back({ { x+1.0f, y+1.0f, 0.0f }, { 1.0f, 1.0f }, { 1.0f, 1.0f, 1.0f }, { 0.0f, 0.0f, (float)i } });
vertexBuffer.push_back({ { x, y+1.0f, 0.0f }, { 0.0f, 1.0f }, { 1.0f, 1.0f, 1.0f }, { 0.0f, 0.0f, (float)i } });
vertexBuffer.push_back({ { x, y, 0.0f }, { 0.0f, 0.0f }, { 1.0f, 1.0f, 1.0f }, { 0.0f, 0.0f, (float)i } });
vertexBuffer.push_back({ { x+1.0f, y, 0.0f }, { 1.0f, 0.0f }, { 1.0f, 1.0f, 1.0f }, { 0.0f, 0.0f, (float)i } });
x += 1.0f;
if (x > 1.0f)
{
x = 0.0f;
y += 1.0f;
}
}
VK_CHECK_RESULT(vulkanDevice->createBuffer(
VK_BUFFER_USAGE_VERTEX_BUFFER_BIT,
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
vertexBuffer.size() * sizeof(Vertex),
&models.quad.vertices.buffer,
&models.quad.vertices.memory,
vertexBuffer.data()));
// Setup indices
std::vector<uint32_t> indexBuffer = { 0,1,2, 2,3,0 };
for (uint32_t i = 0; i < 3; ++i)
{
uint32_t indices[6] = { 0,1,2, 2,3,0 };
for (auto index : indices)
{
indexBuffer.push_back(i * 4 + index);
}
}
models.quad.indexCount = static_cast<uint32_t>(indexBuffer.size());
VK_CHECK_RESULT(vulkanDevice->createBuffer(
VK_BUFFER_USAGE_INDEX_BUFFER_BIT,
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
indexBuffer.size() * sizeof(uint32_t),
&models.quad.indices.buffer,
&models.quad.indices.memory,
indexBuffer.data()));
models.quad.device = device;
}
void setupVertexDescriptions()
{
// Binding description
vertices.bindingDescriptions.resize(1);
vertices.bindingDescriptions[0] =
vks::initializers::vertexInputBindingDescription(
VERTEX_BUFFER_BIND_ID,
vertexLayout.stride(),
VK_VERTEX_INPUT_RATE_VERTEX);
// Attribute descriptions
vertices.attributeDescriptions.resize(5);
// Location 0: Position
vertices.attributeDescriptions[0] =
vks::initializers::vertexInputAttributeDescription(
VERTEX_BUFFER_BIND_ID,
0,
VK_FORMAT_R32G32B32_SFLOAT,
0);
// Location 1: Texture coordinates
vertices.attributeDescriptions[1] =
vks::initializers::vertexInputAttributeDescription(
VERTEX_BUFFER_BIND_ID,
1,
VK_FORMAT_R32G32_SFLOAT,
sizeof(float) * 3);
// Location 2: Color
vertices.attributeDescriptions[2] =
vks::initializers::vertexInputAttributeDescription(
VERTEX_BUFFER_BIND_ID,
2,
VK_FORMAT_R32G32B32_SFLOAT,
sizeof(float) * 5);
// Location 3: Normal
vertices.attributeDescriptions[3] =
vks::initializers::vertexInputAttributeDescription(
VERTEX_BUFFER_BIND_ID,
3,
VK_FORMAT_R32G32B32_SFLOAT,
sizeof(float) * 8);
// Location 4: Tangent
vertices.attributeDescriptions[4] =
vks::initializers::vertexInputAttributeDescription(
VERTEX_BUFFER_BIND_ID,
4,
VK_FORMAT_R32G32B32_SFLOAT,
sizeof(float) * 11);
vertices.inputState = vks::initializers::pipelineVertexInputStateCreateInfo();
vertices.inputState.vertexBindingDescriptionCount = static_cast<uint32_t>(vertices.bindingDescriptions.size());
vertices.inputState.pVertexBindingDescriptions = vertices.bindingDescriptions.data();
vertices.inputState.vertexAttributeDescriptionCount = static_cast<uint32_t>(vertices.attributeDescriptions.size());
vertices.inputState.pVertexAttributeDescriptions = vertices.attributeDescriptions.data();
}
void setupDescriptorPool()
{
std::vector<VkDescriptorPoolSize> poolSizes =
{
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 8),
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 9)
};
VkDescriptorPoolCreateInfo descriptorPoolInfo =
vks::initializers::descriptorPoolCreateInfo(
static_cast<uint32_t>(poolSizes.size()),
poolSizes.data(),
3);
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
}
void setupDescriptorSetLayout()
{
// Deferred shading layout
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings =
{
// Binding 0 : Vertex shader uniform buffer
vks::initializers::descriptorSetLayoutBinding(
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
VK_SHADER_STAGE_VERTEX_BIT,
0),
// Binding 1 : Position texture target / Scene colormap
vks::initializers::descriptorSetLayoutBinding(
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
VK_SHADER_STAGE_FRAGMENT_BIT,
1),
// Binding 2 : Normals texture target
vks::initializers::descriptorSetLayoutBinding(
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
VK_SHADER_STAGE_FRAGMENT_BIT,
2),
// Binding 3 : Albedo texture target
vks::initializers::descriptorSetLayoutBinding(
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
VK_SHADER_STAGE_FRAGMENT_BIT,
3),
// Binding 4 : Fragment shader uniform buffer
vks::initializers::descriptorSetLayoutBinding(
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
VK_SHADER_STAGE_FRAGMENT_BIT,
4),
};
VkDescriptorSetLayoutCreateInfo descriptorLayout =
vks::initializers::descriptorSetLayoutCreateInfo(
setLayoutBindings.data(),
static_cast<uint32_t>(setLayoutBindings.size()));
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
vks::initializers::pipelineLayoutCreateInfo(
&descriptorSetLayout,
1);
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayouts.deferred));
// Offscreen (scene) rendering pipeline layout
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayouts.offscreen));
}
void setupDescriptorSet()
{
std::vector<VkWriteDescriptorSet> writeDescriptorSets;
// Textured quad descriptor set
VkDescriptorSetAllocateInfo allocInfo =
vks::initializers::descriptorSetAllocateInfo(
descriptorPool,
&descriptorSetLayout,
1);
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
// Image descriptors for the offscreen color attachments
VkDescriptorImageInfo texDescriptorPosition =
vks::initializers::descriptorImageInfo(
colorSampler,
offScreenFrameBuf.position.view,
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
VkDescriptorImageInfo texDescriptorNormal =
vks::initializers::descriptorImageInfo(
colorSampler,
offScreenFrameBuf.normal.view,
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
VkDescriptorImageInfo texDescriptorAlbedo =
vks::initializers::descriptorImageInfo(
colorSampler,
offScreenFrameBuf.albedo.view,
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
writeDescriptorSets = {
// Binding 0 : Vertex shader uniform buffer
vks::initializers::writeDescriptorSet(
descriptorSet,
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
0,
&uniformBuffers.vsFullScreen.descriptor),
// Binding 1 : Position texture target
vks::initializers::writeDescriptorSet(
descriptorSet,
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
1,
&texDescriptorPosition),
// Binding 2 : Normals texture target
vks::initializers::writeDescriptorSet(
descriptorSet,
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
2,
&texDescriptorNormal),
// Binding 3 : Albedo texture target
vks::initializers::writeDescriptorSet(
descriptorSet,
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
3,
&texDescriptorAlbedo),
// Binding 4 : Fragment shader uniform buffer
vks::initializers::writeDescriptorSet(
descriptorSet,
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
4,
&uniformBuffers.fsLights.descriptor),
};
vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, NULL);
// Offscreen (scene)
// Model
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.model));
writeDescriptorSets =
{
// Binding 0: Vertex shader uniform buffer
vks::initializers::writeDescriptorSet(
descriptorSets.model,
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
0,
&uniformBuffers.vsOffscreen.descriptor),
// Binding 1: Color map
vks::initializers::writeDescriptorSet(
descriptorSets.model,
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
1,
&textures.model.colorMap.descriptor),
// Binding 2: Normal map
vks::initializers::writeDescriptorSet(
descriptorSets.model,
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
2,
&textures.model.normalMap.descriptor)
};
vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, NULL);
// Background
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.floor));
writeDescriptorSets =
{
// Binding 0: Vertex shader uniform buffer
vks::initializers::writeDescriptorSet(
descriptorSets.floor,
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
0,
&uniformBuffers.vsOffscreen.descriptor),
// Binding 1: Color map
vks::initializers::writeDescriptorSet(
descriptorSets.floor,
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
1,
&textures.floor.colorMap.descriptor),
// Binding 2: Normal map
vks::initializers::writeDescriptorSet(
descriptorSets.floor,
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
2,
&textures.floor.normalMap.descriptor)
};
vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, NULL);
}
void preparePipelines()
{
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_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,
0);
std::vector<VkDynamicState> dynamicStateEnables = {
VK_DYNAMIC_STATE_VIEWPORT,
VK_DYNAMIC_STATE_SCISSOR
};
VkPipelineDynamicStateCreateInfo dynamicState =
vks::initializers::pipelineDynamicStateCreateInfo(
dynamicStateEnables.data(),
static_cast<uint32_t>(dynamicStateEnables.size()),
0);
std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
VkGraphicsPipelineCreateInfo pipelineCreateInfo =
vks::initializers::pipelineCreateInfo(
pipelineLayouts.deferred,
renderPass,
0);
pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
pipelineCreateInfo.pRasterizationState = &rasterizationState;
pipelineCreateInfo.pColorBlendState = &colorBlendState;
pipelineCreateInfo.pMultisampleState = &multisampleState;
pipelineCreateInfo.pViewportState = &viewportState;
pipelineCreateInfo.pDepthStencilState = &depthStencilState;
pipelineCreateInfo.pDynamicState = &dynamicState;
pipelineCreateInfo.stageCount = static_cast<uint32_t>(shaderStages.size());
pipelineCreateInfo.pStages = shaderStages.data();
// Final fullscreen composition pass pipeline
shaderStages[0] = loadShader(getAssetPath() + "shaders/deferred/deferred.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
shaderStages[1] = loadShader(getAssetPath() + "shaders/deferred/deferred.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
// Empty vertex input state, quads are generated by the vertex shader
VkPipelineVertexInputStateCreateInfo emptyInputState = vks::initializers::pipelineVertexInputStateCreateInfo();
pipelineCreateInfo.pVertexInputState = &emptyInputState;
pipelineCreateInfo.layout = pipelineLayouts.deferred;
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.deferred));
// Debug display pipeline
pipelineCreateInfo.pVertexInputState = &vertices.inputState;
shaderStages[0] = loadShader(getAssetPath() + "shaders/deferred/debug.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
shaderStages[1] = loadShader(getAssetPath() + "shaders/deferred/debug.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.debug));
// Offscreen pipeline
shaderStages[0] = loadShader(getAssetPath() + "shaders/deferred/mrt.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
shaderStages[1] = loadShader(getAssetPath() + "shaders/deferred/mrt.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
// Separate render pass
pipelineCreateInfo.renderPass = offScreenFrameBuf.renderPass;
// Separate layout
pipelineCreateInfo.layout = pipelineLayouts.offscreen;