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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 "VulkanExampleBase.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::eLinear
// 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 {
vk::PipelineVertexInputStateCreateInfo inputState;
std::vector<vk::VertexInputBindingDescription> bindingDescriptions;
std::vector<vk::VertexInputAttributeDescription> 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 {
vk::Pipeline deferred;
vk::Pipeline offscreen;
vk::Pipeline debug;
} pipelines;
struct {
vk::PipelineLayout deferred;
vk::PipelineLayout offscreen;
} pipelineLayouts;
struct {
vk::DescriptorSet model;
vk::DescriptorSet floor;
} descriptorSets;
vk::DescriptorSet descriptorSet;
vk::DescriptorSetLayout descriptorSetLayout;
// Framebuffer for offscreen rendering
struct FrameBufferAttachment {
vk::Image image;
vk::DeviceMemory mem;
vk::ImageView view;
vk::Format format;
};
struct FrameBuffer {
uint32_t width, height;
vk::Framebuffer frameBuffer;
FrameBufferAttachment position, normal, albedo;
FrameBufferAttachment depth;
vk::RenderPass renderPass;
} offScreenFrameBuf;
// One sampler for the frame buffer color attachments
vk::Sampler colorSampler;
vk::CommandBuffer offScreenCmdBuffer;
// Semaphore used to synchronize between offscreen and final scene rendering
vk::Semaphore offscreenSemaphore;
VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
{
title = "Vulkan Example - Deferred shading (2016 by Sascha Willems)";
enableTextOverlay = true;
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);
}
~VulkanExample()
{
// Clean up used Vulkan resources
// Note : Inherited destructor cleans up resources stored in base class
device.destroySampler(colorSampler);
// Frame buffer
// Color attachments
device.destroyImageView(offScreenFrameBuf.position.view);
device.destroyImage(offScreenFrameBuf.position.image);
device.freeMemory(offScreenFrameBuf.position.mem);
device.destroyImageView(offScreenFrameBuf.normal.view);
device.destroyImage(offScreenFrameBuf.normal.image);
device.freeMemory(offScreenFrameBuf.normal.mem);
device.destroyImageView(offScreenFrameBuf.albedo.view);
device.destroyImage(offScreenFrameBuf.albedo.image);
device.freeMemory(offScreenFrameBuf.albedo.mem);
// Depth attachment
device.destroyImageView(offScreenFrameBuf.depth.view);
device.destroyImage(offScreenFrameBuf.depth.image);
device.freeMemory(offScreenFrameBuf.depth.mem);
device.destroyFramebuffer(offScreenFrameBuf.frameBuffer);
device.destroyPipeline(pipelines.deferred);
device.destroyPipeline(pipelines.offscreen);
device.destroyPipeline(pipelines.debug);
device.destroyPipelineLayout(pipelineLayouts.deferred);
device.destroyPipelineLayout(pipelineLayouts.offscreen);
device.destroyDescriptorSetLayout(descriptorSetLayout);
// Meshes
models.model.destroy();
models.floor.destroy();
models.quad.destroy();
// Uniform buffers
uniformBuffers.vsOffscreen.destroy();
uniformBuffers.vsFullScreen.destroy();
uniformBuffers.fsLights.destroy();
device.freeCommandBuffers(cmdPool, offScreenCmdBuffer);
device.destroyRenderPass(offScreenFrameBuf.renderPass);
textures.model.colorMap.destroy();
textures.model.normalMap.destroy();
textures.floor.colorMap.destroy();
textures.floor.normalMap.destroy();
device.destroySemaphore(offscreenSemaphore);
}
// 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(
vk::Format format,
vk::ImageUsageFlags usage,
FrameBufferAttachment *attachment)
{
vk::ImageAspectFlags aspectMask;
//vk::ImageLayout imageLayout;
attachment->format = format;
if (usage & vk::ImageUsageFlagBits::eColorAttachment)
{
aspectMask = vk::ImageAspectFlagBits::eColor;
//imageLayout = vk::ImageLayout::eColorAttachmentOptimal;
}
if (usage & vk::ImageUsageFlagBits::eDepthStencilAttachment)
{
aspectMask = vk::ImageAspectFlagBits::eDepth | vk::ImageAspectFlagBits::eStencil;
//imageLayout = vk::ImageLayout::eDepthStencilAttachmentOptimal;
}
//assert(aspectMask > 0);
vk::ImageCreateInfo image;
image.imageType = vk::ImageType::e2D;
image.format = format;
image.extent = vk::Extent3D{ offScreenFrameBuf.width, offScreenFrameBuf.height, 1 };
image.mipLevels = 1;
image.arrayLayers = 1;
image.samples = vk::SampleCountFlagBits::e1;
image.tiling = vk::ImageTiling::eOptimal;
image.usage = usage | vk::ImageUsageFlagBits::eSampled;
vk::MemoryAllocateInfo memAlloc;
vk::MemoryRequirements memReqs;
attachment->image = device.createImage(image);
memReqs = device.getImageMemoryRequirements(attachment->image);
memAlloc.allocationSize = memReqs.size;
memAlloc.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, vk::MemoryPropertyFlagBits::eDeviceLocal);
attachment->mem = device.allocateMemory(memAlloc);
device.bindImageMemory(attachment->image, attachment->mem, 0);
vk::ImageViewCreateInfo imageView;
imageView.viewType = vk::ImageViewType::e2D;
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;
attachment->view = device.createImageView(imageView);
}
// 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::eR16G16B16A16Sfloat,
vk::ImageUsageFlagBits::eColorAttachment,
&offScreenFrameBuf.position);
// (World space) Normals
createAttachment(
vk::Format::eR16G16B16A16Sfloat,
vk::ImageUsageFlagBits::eColorAttachment,
&offScreenFrameBuf.normal);
// Albedo (color)
createAttachment(
vk::Format::eR8G8B8A8Unorm,
vk::ImageUsageFlagBits::eColorAttachment,
&offScreenFrameBuf.albedo);
// Depth attachment
// Find a suitable depth format
vk::Format attDepthFormat;
vk::Bool32 validDepthFormat = vks::tools::getSupportedDepthFormat(physicalDevice, &attDepthFormat);
assert(validDepthFormat);
createAttachment(
attDepthFormat,
vk::ImageUsageFlagBits::eDepthStencilAttachment,
&offScreenFrameBuf.depth);
// Set up separate renderpass with references to the color and depth attachments
std::array<vk::AttachmentDescription, 4> attachmentDescs = {};
// Init attachment properties
for (uint32_t i = 0; i < 4; ++i)
{
attachmentDescs[i].samples = vk::SampleCountFlagBits::e1;
attachmentDescs[i].loadOp = vk::AttachmentLoadOp::eClear;
attachmentDescs[i].storeOp = vk::AttachmentStoreOp::eStore;
attachmentDescs[i].stencilLoadOp = vk::AttachmentLoadOp::eDontCare;
attachmentDescs[i].stencilStoreOp = vk::AttachmentStoreOp::eDontCare;
if (i == 3)
{
attachmentDescs[i].initialLayout = vk::ImageLayout::eUndefined;
attachmentDescs[i].finalLayout = vk::ImageLayout::eDepthStencilAttachmentOptimal;
}
else
{
attachmentDescs[i].initialLayout = vk::ImageLayout::eUndefined;
attachmentDescs[i].finalLayout = vk::ImageLayout::eShaderReadOnlyOptimal;
}
}
// 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<vk::AttachmentReference> colorReferences;
colorReferences.push_back({ 0, vk::ImageLayout::eColorAttachmentOptimal });
colorReferences.push_back({ 1, vk::ImageLayout::eColorAttachmentOptimal });
colorReferences.push_back({ 2, vk::ImageLayout::eColorAttachmentOptimal });
vk::AttachmentReference depthReference = {};
depthReference.attachment = 3;
depthReference.layout = vk::ImageLayout::eDepthStencilAttachmentOptimal;
vk::SubpassDescription subpass = {};
subpass.pipelineBindPoint = vk::PipelineBindPoint::eGraphics;
subpass.pColorAttachments = colorReferences.data();
subpass.colorAttachmentCount = static_cast<uint32_t>(colorReferences.size());
subpass.pDepthStencilAttachment = &depthReference;
// Use subpass dependencies for attachment layput transitions
std::array<vk::SubpassDependency, 2> dependencies;
dependencies[0].srcSubpass = VK_SUBPASS_EXTERNAL;
dependencies[0].dstSubpass = 0;
dependencies[0].srcStageMask = vk::PipelineStageFlagBits::eBottomOfPipe;
dependencies[0].dstStageMask = vk::PipelineStageFlagBits::eColorAttachmentOutput;
dependencies[0].srcAccessMask = vk::AccessFlagBits::eMemoryRead;
dependencies[0].dstAccessMask = vk::AccessFlagBits::eColorAttachmentRead | vk::AccessFlagBits::eColorAttachmentWrite;
dependencies[0].dependencyFlags = vk::DependencyFlagBits::eByRegion;
dependencies[1].srcSubpass = 0;
dependencies[1].dstSubpass = VK_SUBPASS_EXTERNAL;
dependencies[1].srcStageMask = vk::PipelineStageFlagBits::eColorAttachmentOutput;
dependencies[1].dstStageMask = vk::PipelineStageFlagBits::eBottomOfPipe;
dependencies[1].srcAccessMask = vk::AccessFlagBits::eColorAttachmentRead | vk::AccessFlagBits::eColorAttachmentWrite;
dependencies[1].dstAccessMask = vk::AccessFlagBits::eMemoryRead;
dependencies[1].dependencyFlags = vk::DependencyFlagBits::eByRegion;
vk::RenderPassCreateInfo renderPassInfo = {};
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();
offScreenFrameBuf.renderPass = device.createRenderPass(renderPassInfo);
std::array<vk::ImageView,4> attachments;
attachments[0] = offScreenFrameBuf.position.view;
attachments[1] = offScreenFrameBuf.normal.view;
attachments[2] = offScreenFrameBuf.albedo.view;
attachments[3] = offScreenFrameBuf.depth.view;
vk::FramebufferCreateInfo fbufCreateInfo = {};
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;
offScreenFrameBuf.frameBuffer = device.createFramebuffer(fbufCreateInfo);
// Create sampler to sample from the color attachments
vk::SamplerCreateInfo sampler;
sampler.magFilter = vk::Filter::eNearest;
sampler.minFilter = vk::Filter::eNearest;
sampler.mipmapMode = vk::SamplerMipmapMode::eLinear;
sampler.addressModeU = vk::SamplerAddressMode::eClampToEdge;
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::BorderColor::eFloatOpaqueWhite;
colorSampler = device.createSampler(sampler);
}
// Build command buffer for rendering the scene to the offscreen frame buffer attachments
void buildDeferredCommandBuffer()
{
if (!offScreenCmdBuffer)
{
offScreenCmdBuffer = VulkanExampleBase::createCommandBuffer(vk::CommandBufferLevel::ePrimary, false);
}
// Create a semaphore used to synchronize offscreen rendering and usage
vk::SemaphoreCreateInfo semaphoreCreateInfo;
offscreenSemaphore = device.createSemaphore(semaphoreCreateInfo);
vk::CommandBufferBeginInfo cmdBufInfo;
// Clear values for all attachments written in the fragment sahder
std::array<vk::ClearValue,4> clearValues;
clearValues[0].color = vk::ClearColorValue{ std::array<float, 4>{ 0.0f, 0.0f, 0.0f, 0.0f } };
clearValues[1].color = vk::ClearColorValue{ std::array<float, 4>{ 0.0f, 0.0f, 0.0f, 0.0f } };
clearValues[2].color = vk::ClearColorValue{ std::array<float, 4>{ 0.0f, 0.0f, 0.0f, 0.0f } };
clearValues[3].depthStencil = vk::ClearDepthStencilValue{ 1.0f, 0 };
vk::RenderPassBeginInfo 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();
offScreenCmdBuffer.begin(cmdBufInfo);
offScreenCmdBuffer.beginRenderPass(renderPassBeginInfo, vk::SubpassContents::eInline);
vk::Viewport viewport = vks::initializers::viewport((float)offScreenFrameBuf.width, (float)offScreenFrameBuf.height, 0.0f, 1.0f);
offScreenCmdBuffer.setViewport(0, viewport);
vk::Rect2D scissor = vks::initializers::rect2D(offScreenFrameBuf.width, offScreenFrameBuf.height, 0, 0);
offScreenCmdBuffer.setScissor(0, scissor);
offScreenCmdBuffer.bindPipeline(vk::PipelineBindPoint::eGraphics, pipelines.offscreen);
std::vector<vk::DeviceSize> offsets = { 0 };
// Background
offScreenCmdBuffer.bindDescriptorSets(vk::PipelineBindPoint::eGraphics, pipelineLayouts.offscreen, 0, descriptorSets.floor, nullptr);
offScreenCmdBuffer.bindVertexBuffers(VERTEX_BUFFER_BIND_ID, models.floor.vertices.buffer, offsets);
offScreenCmdBuffer.bindIndexBuffer(models.floor.indices.buffer, 0, vk::IndexType::eUint32);
offScreenCmdBuffer.drawIndexed(models.floor.indexCount, 1, 0, 0, 0);
// Object
offScreenCmdBuffer.bindDescriptorSets(vk::PipelineBindPoint::eGraphics, pipelineLayouts.offscreen, 0, descriptorSets.model, nullptr);
offScreenCmdBuffer.bindVertexBuffers(VERTEX_BUFFER_BIND_ID, models.model.vertices.buffer, offsets);
offScreenCmdBuffer.bindIndexBuffer(models.model.indices.buffer, 0, vk::IndexType::eUint32);
offScreenCmdBuffer.drawIndexed(models.model.indexCount, 3, 0, 0, 0);
offScreenCmdBuffer.endRenderPass();
offScreenCmdBuffer.end();
}
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;
vk::Format texFormat;
// Get supported compressed texture format
if (vulkanDevice->features.textureCompressionBC) {
texFormatSuffix = "_bc3_unorm";
texFormat = vk::Format::eBc3UnormBlock;
}
else if (vulkanDevice->features.textureCompressionASTC_LDR) {
texFormatSuffix = "_astc_8x8_unorm";
texFormat = vk::Format::eAstc8x8UnormBlock;
}
else if (vulkanDevice->features.textureCompressionETC2) {
texFormatSuffix = "_etc2_unorm";
texFormat = vk::Format::eEtc2R8G8B8A8UnormBlock;
}
else {
vks::tools::exitFatal("Device does not support any compressed texture format!", "Error");
}
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()
{
vk::CommandBufferBeginInfo cmdBufInfo;
vk::ClearValue clearValues[2];
clearValues[0].color = vk::ClearColorValue{ std::array<float, 4>{ 0.0f, 0.0f, 0.2f, 0.0f } };
clearValues[1].depthStencil = vk::ClearDepthStencilValue{ 1.0f, 0 };
vk::RenderPassBeginInfo 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 (uint32_t i = 0; i < drawCmdBuffers.size(); ++i)
{
// Set target frame buffer
renderPassBeginInfo.framebuffer = frameBuffers[i];
drawCmdBuffers[i].begin(cmdBufInfo);
drawCmdBuffers[i].beginRenderPass(renderPassBeginInfo, vk::SubpassContents::eInline);
vk::Viewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
drawCmdBuffers[i].setViewport(0, viewport);
vk::Rect2D scissor = vks::initializers::rect2D(width, height, 0, 0);
drawCmdBuffers[i].setScissor(0, scissor);
std::vector<vk::DeviceSize> offsets = { 0 };
drawCmdBuffers[i].bindDescriptorSets(vk::PipelineBindPoint::eGraphics, pipelineLayouts.deferred, 0, descriptorSet, nullptr);
if (debugDisplay)
{
drawCmdBuffers[i].bindPipeline(vk::PipelineBindPoint::eGraphics, pipelines.debug);
drawCmdBuffers[i].bindVertexBuffers(VERTEX_BUFFER_BIND_ID, models.quad.vertices.buffer, offsets);
drawCmdBuffers[i].bindIndexBuffer(models.quad.indices.buffer, 0, vk::IndexType::eUint32);
drawCmdBuffers[i].drawIndexed(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;
drawCmdBuffers[i].setViewport(0, viewport);
}
// Final composition as full screen quad
drawCmdBuffers[i].bindPipeline(vk::PipelineBindPoint::eGraphics, pipelines.deferred);
drawCmdBuffers[i].bindVertexBuffers(VERTEX_BUFFER_BIND_ID, models.quad.vertices.buffer, offsets);
drawCmdBuffers[i].bindIndexBuffer(models.quad.indices.buffer, 0, vk::IndexType::eUint32);
drawCmdBuffers[i].drawIndexed(6, 1, 0, 0, 1);
drawCmdBuffers[i].endRenderPass();
drawCmdBuffers[i].end();
}
}
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(Vertex{ { 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(Vertex{ { 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(Vertex{ { x, y, 0.0f }, { 0.0f, 0.0f }, { 1.0f, 1.0f, 1.0f }, { 0.0f, 0.0f, (float)i } });
vertexBuffer.push_back(Vertex{ { 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;
}
}
vulkanDevice->createBuffer(
vk::BufferUsageFlagBits::eVertexBuffer,
vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent,
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());
vulkanDevice->createBuffer(
vk::BufferUsageFlagBits::eIndexBuffer,
vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent,
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::VertexInputRate::eVertex);
// Attribute descriptions
vertices.attributeDescriptions.resize(5);
// Location 0: Position
vertices.attributeDescriptions[0] =
vks::initializers::vertexInputAttributeDescription(
VERTEX_BUFFER_BIND_ID,
0,
vk::Format::eR32G32B32Sfloat,
0);
// Location 1: Texture coordinates
vertices.attributeDescriptions[1] =
vks::initializers::vertexInputAttributeDescription(
VERTEX_BUFFER_BIND_ID,
1,
vk::Format::eR32G32Sfloat,
sizeof(float) * 3);
// Location 2: Color
vertices.attributeDescriptions[2] =
vks::initializers::vertexInputAttributeDescription(
VERTEX_BUFFER_BIND_ID,
2,
vk::Format::eR32G32B32Sfloat,
sizeof(float) * 5);
// Location 3: Normal
vertices.attributeDescriptions[3] =
vks::initializers::vertexInputAttributeDescription(
VERTEX_BUFFER_BIND_ID,
3,
vk::Format::eR32G32B32Sfloat,
sizeof(float) * 8);
// Location 4: Tangent
vertices.attributeDescriptions[4] =
vks::initializers::vertexInputAttributeDescription(
VERTEX_BUFFER_BIND_ID,
4,
vk::Format::eR32G32B32Sfloat,
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<vk::DescriptorPoolSize> poolSizes =
{
vks::initializers::descriptorPoolSize(vk::DescriptorType::eUniformBuffer, 8),
vks::initializers::descriptorPoolSize(vk::DescriptorType::eCombinedImageSampler, 9)
};
vk::DescriptorPoolCreateInfo descriptorPoolInfo =
vks::initializers::descriptorPoolCreateInfo(
static_cast<uint32_t>(poolSizes.size()),
poolSizes.data(),
3);
descriptorPool = device.createDescriptorPool(descriptorPoolInfo);
}
void setupDescriptorSetLayout()
{
// Deferred shading layout
std::vector<vk::DescriptorSetLayoutBinding> setLayoutBindings =
{
// Binding 0 : Vertex shader uniform buffer
vks::initializers::descriptorSetLayoutBinding(
vk::DescriptorType::eUniformBuffer,
vk::ShaderStageFlagBits::eVertex,
0),
// Binding 1 : Position texture target / Scene colormap
vks::initializers::descriptorSetLayoutBinding(
vk::DescriptorType::eCombinedImageSampler,
vk::ShaderStageFlagBits::eFragment,
1),
// Binding 2 : Normals texture target
vks::initializers::descriptorSetLayoutBinding(
vk::DescriptorType::eCombinedImageSampler,
vk::ShaderStageFlagBits::eFragment,
2),
// Binding 3 : Albedo texture target
vks::initializers::descriptorSetLayoutBinding(
vk::DescriptorType::eCombinedImageSampler,
vk::ShaderStageFlagBits::eFragment,
3),
// Binding 4 : Fragment shader uniform buffer
vks::initializers::descriptorSetLayoutBinding(
vk::DescriptorType::eUniformBuffer,
vk::ShaderStageFlagBits::eFragment,
4),
};
vk::DescriptorSetLayoutCreateInfo descriptorLayout =
vks::initializers::descriptorSetLayoutCreateInfo(
setLayoutBindings);
descriptorSetLayout = device.createDescriptorSetLayout(descriptorLayout);
vk::PipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
vks::initializers::pipelineLayoutCreateInfo(
&descriptorSetLayout,
1);
pipelineLayouts.deferred = device.createPipelineLayout(pPipelineLayoutCreateInfo);
// Offscreen (scene) rendering pipeline layout
pipelineLayouts.offscreen = device.createPipelineLayout(pPipelineLayoutCreateInfo);
}
void setupDescriptorSet()
{
std::vector<vk::WriteDescriptorSet> writeDescriptorSets;
// Textured quad descriptor set
vk::DescriptorSetAllocateInfo allocInfo =
vks::initializers::descriptorSetAllocateInfo(
descriptorPool,
&descriptorSetLayout,
1);
descriptorSet = device.allocateDescriptorSets(allocInfo)[0];
// Image descriptors for the offscreen color attachments
vk::DescriptorImageInfo texDescriptorPosition =
vks::initializers::descriptorImageInfo(
colorSampler,
offScreenFrameBuf.position.view,
vk::ImageLayout::eShaderReadOnlyOptimal);
vk::DescriptorImageInfo texDescriptorNormal =
vks::initializers::descriptorImageInfo(
colorSampler,
offScreenFrameBuf.normal.view,
vk::ImageLayout::eShaderReadOnlyOptimal);
vk::DescriptorImageInfo texDescriptorAlbedo =
vks::initializers::descriptorImageInfo(
colorSampler,
offScreenFrameBuf.albedo.view,
vk::ImageLayout::eShaderReadOnlyOptimal);
writeDescriptorSets = {
// Binding 0 : Vertex shader uniform buffer
vks::initializers::writeDescriptorSet(
descriptorSet,
vk::DescriptorType::eUniformBuffer,
0,
&uniformBuffers.vsFullScreen.descriptor),
// Binding 1 : Position texture target
vks::initializers::writeDescriptorSet(
descriptorSet,
vk::DescriptorType::eCombinedImageSampler,
1,
&texDescriptorPosition),
// Binding 2 : Normals texture target
vks::initializers::writeDescriptorSet(
descriptorSet,
vk::DescriptorType::eCombinedImageSampler,
2,
&texDescriptorNormal),
// Binding 3 : Albedo texture target
vks::initializers::writeDescriptorSet(
descriptorSet,
vk::DescriptorType::eCombinedImageSampler,
3,
&texDescriptorAlbedo),
// Binding 4 : Fragment shader uniform buffer
vks::initializers::writeDescriptorSet(
descriptorSet,
vk::DescriptorType::eUniformBuffer,
4,
&uniformBuffers.fsLights.descriptor),
};
device.updateDescriptorSets(writeDescriptorSets, nullptr);
// Offscreen (scene)
// Model
descriptorSets.model = device.allocateDescriptorSets(allocInfo)[0];
writeDescriptorSets =
{
// Binding 0: Vertex shader uniform buffer
vks::initializers::writeDescriptorSet(
descriptorSets.model,
vk::DescriptorType::eUniformBuffer,
0,
&uniformBuffers.vsOffscreen.descriptor),
// Binding 1: Color map
vks::initializers::writeDescriptorSet(
descriptorSets.model,
vk::DescriptorType::eCombinedImageSampler,
1,
&textures.model.colorMap.descriptor),
// Binding 2: Normal map
vks::initializers::writeDescriptorSet(
descriptorSets.model,
vk::DescriptorType::eCombinedImageSampler,
2,
&textures.model.normalMap.descriptor)
};
device.updateDescriptorSets(writeDescriptorSets, nullptr);
// Background
descriptorSets.floor = device.allocateDescriptorSets(allocInfo)[0];
writeDescriptorSets =
{
// Binding 0: Vertex shader uniform buffer
vks::initializers::writeDescriptorSet(
descriptorSets.floor,
vk::DescriptorType::eUniformBuffer,
0,
&uniformBuffers.vsOffscreen.descriptor),
// Binding 1: Color map
vks::initializers::writeDescriptorSet(
descriptorSets.floor,
vk::DescriptorType::eCombinedImageSampler,
1,
&textures.floor.colorMap.descriptor),
// Binding 2: Normal map
vks::initializers::writeDescriptorSet(
descriptorSets.floor,
vk::DescriptorType::eCombinedImageSampler,
2,
&textures.floor.normalMap.descriptor)
};
device.updateDescriptorSets(writeDescriptorSets, nullptr);
}
void preparePipelines()
{
vk::PipelineInputAssemblyStateCreateInfo inputAssemblyState =
vks::initializers::pipelineInputAssemblyStateCreateInfo(
vk::PrimitiveTopology::eTriangleList,
vk::PipelineInputAssemblyStateCreateFlags(),
VK_FALSE);
vk::PipelineRasterizationStateCreateInfo rasterizationState =
vks::initializers::pipelineRasterizationStateCreateInfo(
vk::PolygonMode::eFill,
vk::CullModeFlagBits::eBack,
vk::FrontFace::eClockwise);
vk::PipelineColorBlendAttachmentState blendAttachmentState =
vks::initializers::pipelineColorBlendAttachmentState();
vk::PipelineColorBlendStateCreateInfo colorBlendState =
vks::initializers::pipelineColorBlendStateCreateInfo(
1,
&blendAttachmentState);
vk::PipelineDepthStencilStateCreateInfo depthStencilState =
vks::initializers::pipelineDepthStencilStateCreateInfo(
VK_TRUE,
VK_TRUE,
vk::CompareOp::eLessOrEqual);
vk::PipelineViewportStateCreateInfo viewportState =
vks::initializers::pipelineViewportStateCreateInfo(1, 1);
vk::PipelineMultisampleStateCreateInfo multisampleState =
vks::initializers::pipelineMultisampleStateCreateInfo(vk::SampleCountFlagBits::e1);
std::vector<vk::DynamicState> dynamicStateEnables = {
vk::DynamicState::eViewport,
vk::DynamicState::eScissor
};
vk::PipelineDynamicStateCreateInfo dynamicState =
vks::initializers::pipelineDynamicStateCreateInfo(
dynamicStateEnables);
std::array<vk::PipelineShaderStageCreateInfo, 2> shaderStages;
vk::GraphicsPipelineCreateInfo pipelineCreateInfo =
vks::initializers::pipelineCreateInfo(
pipelineLayouts.deferred,
renderPass);
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.vert.spv", vk::ShaderStageFlagBits::eVertex);
shaderStages[1] = loadShader(getAssetPath() + "shaders/deferred.frag.spv", vk::ShaderStageFlagBits::eFragment);
// Empty vertex input state, quads are generated by the vertex shader
vk::PipelineVertexInputStateCreateInfo emptyInputState = vks::initializers::pipelineVertexInputStateCreateInfo();
pipelineCreateInfo.pVertexInputState = &emptyInputState;
pipelineCreateInfo.layout = pipelineLayouts.deferred;
pipelines.deferred = device.createGraphicsPipelines(pipelineCache, pipelineCreateInfo)[0];
// Debug display pipeline
pipelineCreateInfo.pVertexInputState = &vertices.inputState;
shaderStages[0] = loadShader(getAssetPath() + "shaders/debug.vert.spv", vk::ShaderStageFlagBits::eVertex);
shaderStages[1] = loadShader(getAssetPath() + "shaders/debug.frag.spv", vk::ShaderStageFlagBits::eFragment);
pipelines.debug = device.createGraphicsPipelines(pipelineCache, pipelineCreateInfo)[0];
// Offscreen pipeline
shaderStages[0] = loadShader(getAssetPath() + "shaders/mrt.vert.spv", vk::ShaderStageFlagBits::eVertex);
shaderStages[1] = loadShader(getAssetPath() + "shaders/mrt.frag.spv", vk::ShaderStageFlagBits::eFragment);
// Separate render pass
pipelineCreateInfo.renderPass = offScreenFrameBuf.renderPass;
// Separate layout
pipelineCreateInfo.layout = pipelineLayouts.offscreen;
// Blend attachment states required for all color attachments
// This is important, as color write mask will otherwise be 0x0 and you
// won't see anything rendered to the attachment
vk::PipelineColorBlendAttachmentState tmp = vks::initializers::pipelineColorBlendAttachmentState();
std::array<vk::PipelineColorBlendAttachmentState, 3> blendAttachmentStates = {
tmp, tmp, tmp };
colorBlendState.attachmentCount = static_cast<uint32_t>(blendAttachmentStates.size());
colorBlendState.pAttachments = blendAttachmentStates.data();
pipelines.offscreen = device.createGraphicsPipelines(pipelineCache, pipelineCreateInfo)[0];
}
// Prepare and initialize uniform buffer containing shader uniforms
void prepareUniformBuffers()
{
// Fullscreen vertex shader
vulkanDevice->createBuffer(
vk::BufferUsageFlagBits::eUniformBuffer,
vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent,
&uniformBuffers.vsFullScreen,
sizeof(uboVS));
// Deferred vertex shader
vulkanDevice->createBuffer(
vk::BufferUsageFlagBits::eUniformBuffer,
vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent,
&uniformBuffers.vsOffscreen,