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main.cpp
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main.cpp
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/*
* SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define VMA_IMPLEMENTATION
#include <glm/glm.hpp>
#include "nvvkhl/appbase_vk.hpp"
#include "backends/imgui_impl_glfw.h"
#include "backends/imgui_impl_vulkan.h"
#include "nvh/primitives.hpp"
#include "nvvk/context_vk.hpp"
#include "nvvk/descriptorsets_vk.hpp"
#include "nvvk/dynamicrendering_vk.hpp"
#include "nvvk/images_vk.hpp"
#include "nvvk/pipeline_vk.hpp"
#include "nvvk/memallocator_vma_vk.hpp"
#include "nvvkhl/gbuffer.hpp"
#include "streamline_wrapper.hpp"
#include "shaders/common.h"
#include "_autogen/post.vert.h"
#include "_autogen/post.frag.h"
#include "_autogen/scene.vert.h"
#include "_autogen/scene.frag.h"
static const int SAMPLE_WIDTH = 1920;
static const int SAMPLE_HEIGHT = 1080;
// Streamline features to enable
static const sl::Feature SL_FEATURES[] = {
sl::kFeatureReflex, // Reflex is required for DLSS Frame Generation
sl::kFeatureDLSS, // DLSS Super Resolution
sl::kFeatureDLSS_G, // DLSS Frame Generation
};
static const VkFormat SAMPLE_DEPTH_FORMAT =
VK_FORMAT_D24_UNORM_S8_UINT; // Streamline only supports VK_FORMAT_D24_UNORM_S8_UINT and VK_FORMAT_D32_SFLOAT currently
static const VkFormat SAMPLE_COLOR_FORMATS[] = {
VK_FORMAT_R16G16B16A16_SFLOAT, // Color
VK_FORMAT_R16G16_SFLOAT // Motion vectors (must be in format VK_FORMAT_R16G16_SFLOAT or VK_FORMAT_R32G32_SFLOAT)
};
#define USE_D3D_CLIP_SPACE 0
class StreamlineSample : public nvvkhl::AppBaseVk
{
public:
StreamlineSample() = default;
~StreamlineSample() override = default;
void create(const nvvkhl::AppBaseVkCreateInfo& info, sl::Result dlssSupported, sl::Result dlssgSupported)
{
AppBaseVk::create(info);
m_dlssSupported = dlssSupported;
m_dlssgSupported = dlssgSupported;
// This sample only operates with a single viewport, so create a handle for viewport index zero
m_viewportHandle = sl::ViewportHandle(0);
// Limit to 180 FPS by default
m_reflexOptions.frameLimitUs = 5555;
// This sample does simulation and rendering in a single thread, so can't use markers to optimize
m_reflexOptions.useMarkersToOptimize = false;
// Set Streamline default options
slDLSSSetOptions(m_viewportHandle, m_dlssOptions);
slDLSSGSetOptions(m_viewportHandle, m_dlssgOptions);
slReflexSetOptions(m_reflexOptions);
m_dset = std::make_unique<nvvk::DescriptorSetContainer>(info.device);
m_alloc = std::make_unique<nvvk::ResourceAllocatorVma>(info.instance, info.device, info.physicalDevice);
const VkSamplerCreateInfo samplerCreateInfo = nvvk::makeSamplerCreateInfo();
m_defaultSampler = m_alloc->acquireSampler(samplerCreateInfo);
createScene();
createPipelines();
createImages(getSize());
}
void destroy() override
{
vkDeviceWaitIdle(m_device);
destroyImages();
destroyPipelines();
destroyScene();
m_alloc->releaseSampler(m_defaultSampler);
m_defaultSampler = VK_NULL_HANDLE;
m_dset.reset();
m_alloc.reset();
AppBaseVk::destroy();
}
void onResize(int width, int height) override
{
createImages({static_cast<uint32_t>(width), static_cast<uint32_t>(height)});
}
void prepareFrame() override
{
AppBaseVk::prepareFrame();
ImGui_ImplGlfw_NewFrame();
ImGui::NewFrame();
drawGui();
ImGui::Render();
m_animationTimePrev = m_animationTime;
m_animationTime += ImGui::GetIO().DeltaTime;
}
void renderFrame(VkCommandBuffer cmd, sl::FrameToken* frame)
{
const VkExtent2D renderSize = m_gBuffers->getSize();
const VkExtent2D outputSize = getSize();
const float aspectRatio = m_gBuffers->getAspectRatio();
const float scalingRatio = static_cast<float>(outputSize.width) / static_cast<float>(renderSize.width);
// Get view information from camera
const glm::mat4 viewMatrix = CameraManip.getMatrix();
const glm::vec2 clipPlanes = CameraManip.getClipPlanes();
glm::mat4 projMatrix =
glm::perspectiveRH_ZO(glm::radians(CameraManip.getFov()), aspectRatio, clipPlanes.x, clipPlanes.y);
#if !USE_D3D_CLIP_SPACE
// Flip the Y axis to convert from D3D to Vulkan:
projMatrix[1][1] *= -1;
#endif
glm::vec3 geye, gcenter, gup;
CameraManip.getLookat(geye, gcenter, gup);
glm::vec3 eye = geye;
glm::vec3 center = gcenter;
glm::vec3 up = gup;
glm::vec3 right = glm::normalize(glm::cross(center - eye, up));
glm::vec3 forward = glm::normalize(center - eye);
// Calculate pixel jitter offset using Halton sequence
glm::vec2 jitterOffset = {};
if(m_dlssOptions.mode != sl::DLSSMode::eOff)
{
const auto halton = [](uint32_t index, uint32_t base) -> float {
float f = 1.0f;
float r = 0.0f;
while(index > 0)
{
f *= static_cast<float>(base);
r += static_cast<float>(index % base) / f;
index /= base;
}
return r;
};
const uint32_t jitterPhases = static_cast<uint32_t>(8 * scalingRatio * scalingRatio + 0.5f);
const uint32_t jitterCurrentIndex = (*frame % jitterPhases) + 1;
jitterOffset.x = halton(jitterCurrentIndex, 2) - 0.5f;
jitterOffset.y = halton(jitterCurrentIndex, 3) - 0.5f;
}
// Update Streamline constants
{
const auto matrixToSL = [](const glm::mat4& m) -> sl::float4x4 {
// Streamline expects row-major matrices
sl::float4x4 res;
res.row[0].x = m[0][0];
res.row[0].y = m[1][0];
res.row[0].z = m[2][0];
res.row[0].w = m[3][0];
res.row[1].x = m[0][1];
res.row[1].y = m[1][1];
res.row[1].z = m[2][1];
res.row[1].w = m[3][1];
res.row[2].x = m[0][2];
res.row[2].y = m[1][2];
res.row[2].z = m[2][2];
res.row[2].w = m[3][2];
res.row[3].x = m[0][3];
res.row[3].y = m[1][3];
res.row[3].z = m[2][3];
res.row[3].w = m[3][3];
return res;
};
sl::Constants constants;
constants.jitterOffset = sl::float2(jitterOffset.x, jitterOffset.y);
constants.mvecScale = sl::float2(1.0f, 1.0f); // getMotion in scene.frag calculates normalized motion vectors already, so do not need to scale
glm::mat4 projMatrixD3D = projMatrix;
glm::mat4 projMatrixPrevD3D = m_projMatrixPrev;
#if USE_D3D_CLIP_SPACE
// getMotion in scene.frag does not flip Y coordinate for D3D clip space, so do it via scaling
constants.mvecScale.y *= -1.0f;
#else
// Streamline expects clip space as defined in Direct3D (X left->right, Y bottom->top, Z front->back)
// But clip space in Vulkan is upside down (X left->right, Y top->bottom, Z front-back), so need to adjust projection matrices accordingly
projMatrixD3D[1][1] *= -1.0f;
projMatrixPrevD3D[1][1] *= -1.0f;
#endif
const glm::mat4 reprojectionMatrix =
projMatrixPrevD3D * (m_viewMatrixPrev * glm::inverse(viewMatrix)) * glm::inverse(projMatrixD3D);
constants.cameraViewToClip = matrixToSL(projMatrix);
constants.clipToCameraView = matrixToSL(glm::inverse(projMatrix));
constants.clipToLensClip = matrixToSL(glm::mat4(1));
constants.clipToPrevClip = matrixToSL(reprojectionMatrix);
constants.prevClipToClip = matrixToSL(glm::inverse(reprojectionMatrix));
constants.cameraPinholeOffset = sl::float2(0.0f, 0.0f);
constants.cameraPos = sl::float3(eye.x, eye.y, eye.z);
constants.cameraUp = sl::float3(up.x, up.y, up.z);
constants.cameraRight = sl::float3(right.x, right.y, right.z);
constants.cameraFwd = sl::float3(forward.x, forward.y, forward.z);
constants.cameraNear = clipPlanes.x;
constants.cameraFar = clipPlanes.y;
constants.cameraFOV = glm::radians(CameraManip.getFov());
constants.cameraAspectRatio = aspectRatio;
constants.depthInverted = (projMatrix[2][2] == 0.0f) ? sl::Boolean::eTrue : sl::Boolean::eFalse;
constants.cameraMotionIncluded = sl::Boolean::eTrue;
constants.motionVectors3D = sl::Boolean::eFalse;
constants.reset = sl::Boolean::eFalse;
constants.motionVectorsJittered = sl::Boolean::eFalse;
if(SL_FAILED(res, slSetConstants(constants, *frame, m_viewportHandle)))
{
LOGE("Streamline: Failed to set constants (%d)\n", res);
return;
}
}
// Update frame info uniform buffer
{
FrameInfo frameInfo;
frameInfo.viewProj = projMatrix * viewMatrix;
frameInfo.viewProjPrev = m_projMatrixPrev * m_viewMatrixPrev;
frameInfo.jitterOffset = jitterOffset * 2.0f / glm::vec2(renderSize.width, renderSize.height);
frameInfo.camPos = eye;
vkCmdUpdateBuffer(cmd, m_frameInfo.buffer, 0, sizeof(frameInfo), &frameInfo);
VkMemoryBarrier barrier = {VK_STRUCTURE_TYPE_MEMORY_BARRIER};
barrier.srcAccessMask = VK_ACCESS_MEMORY_WRITE_BIT;
barrier.dstAccessMask = VK_ACCESS_UNIFORM_READ_BIT;
vkCmdPipelineBarrier(cmd, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_VERTEX_SHADER_BIT | VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT,
0, 1, &barrier, 0, nullptr, 0, nullptr);
}
// Scene rendering
{
std::vector<VkImageView> colorImageViews;
for(uint32_t i = 0; i < std::size(SAMPLE_COLOR_FORMATS); i++)
{
colorImageViews.push_back(m_gBuffers->getColorImageView(i));
nvvk::cmdBarrierImageLayout(cmd, m_gBuffers->getColorImage(i), VK_IMAGE_LAYOUT_UNDEFINED,
VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
}
nvvk::cmdBarrierImageLayout(cmd, m_gBuffers->getDepthImage(), VK_IMAGE_LAYOUT_UNDEFINED,
VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT);
nvvk::createRenderingInfo renderingInfo({{0, 0}, renderSize}, colorImageViews, m_gBuffers->getDepthImageView(),
VK_ATTACHMENT_LOAD_OP_CLEAR, VK_ATTACHMENT_LOAD_OP_CLEAR);
renderingInfo.colorAttachments[0].clearValue = {1.0f, 0.0f, 1.0f, 1.0f}; // Color
renderingInfo.colorAttachments[1].clearValue = {0.0f, 0.0f, 0.0f, 0.0f}; // Motion vectors
renderingInfo.pStencilAttachment = nullptr;
vkCmdBeginRendering(cmd, &renderingInfo);
#if USE_D3D_CLIP_SPACE
// Flip viewport to simulate D3D clip space (this is supported since the VK_KHR_maintenance1 extension)
const VkViewport viewport = {0.0f,
static_cast<float>(renderSize.height),
static_cast<float>(renderSize.width),
-static_cast<float>(renderSize.height),
0.0f,
1.0f};
#else
const VkViewport viewport = {
0.0f, 0.0f, static_cast<float>(renderSize.width), static_cast<float>(renderSize.height), 0.0f, 1.0f};
#endif
vkCmdSetViewport(cmd, 0, 1, &viewport);
const VkRect2D scissor = {{0, 0}, {renderSize.width, renderSize.height}};
vkCmdSetScissor(cmd, 0, 1, &scissor);
vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, m_scenePipeline);
vkCmdBindDescriptorSets(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, m_dset->getPipeLayout(), 0, m_dset->getSetsCount(),
m_dset->getSets(), 0, nullptr);
for(const Node& node : m_sceneNodes)
{
NodeInfo nodeInfo;
nodeInfo.model = nodeInfo.modelPrev = node.localMatrix();
if(node.motion)
{
nodeInfo.model *= glm::translate(glm::mat4(1.f), {-sinf(fmodf(m_animationTime, glm::two_pi<float>())), 0.0f, 0.0f});
nodeInfo.modelPrev *=
glm::translate(glm::mat4(1.f), {-sinf(fmodf(m_animationTimePrev, glm::two_pi<float>())), 0.0f, 0.0f});
}
nodeInfo.color = glm::vec3(sin(glm::vec3(1.33333f, 2.33333f, 3.33333f) * static_cast<float>(node.material)) * 0.5f + 0.5f);
vkCmdPushConstants(cmd, m_dset->getPipeLayout(), VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0,
sizeof(nodeInfo), &nodeInfo);
const VkDeviceSize offsets = {0};
vkCmdBindVertexBuffers(cmd, 0, 1, &m_sceneMeshes[node.mesh].verticesBuffer.buffer, &offsets);
vkCmdBindIndexBuffer(cmd, m_sceneMeshes[node.mesh].trianglesBuffer.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(cmd, static_cast<uint32_t>(m_sceneMeshes[node.mesh].triangles.size() * 3), 1, 0, 0, 0);
}
vkCmdEndRendering(cmd);
}
// Tag current state of resources needed for DLSS Super Resolution
{
sl::Resource colorInputResource(sl::ResourceType::eTex2d, m_gBuffers->getColorImage(0), nullptr,
m_gBuffers->getColorImageView(0), VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
colorInputResource.width = renderSize.width;
colorInputResource.height = renderSize.height;
colorInputResource.nativeFormat = m_gBuffers->getColorFormat(0);
colorInputResource.mipLevels = 1;
colorInputResource.arrayLayers = 1;
colorInputResource.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_STORAGE_BIT
| VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT; // See nvvkhl::GBuffer::create
sl::Resource colorOutputResource(sl::ResourceType::eTex2d, m_outputImage.image, nullptr, m_outputImageView,
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
colorOutputResource.width = outputSize.width;
colorOutputResource.height = outputSize.height;
colorOutputResource.nativeFormat = SAMPLE_COLOR_FORMATS[0];
colorOutputResource.mipLevels = 1;
colorOutputResource.arrayLayers = 1;
colorOutputResource.usage = VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_STORAGE_BIT; // See createImages below
sl::Resource depthResource(sl::ResourceType::eTex2d, m_gBuffers->getDepthImage(), nullptr,
m_gBuffers->getDepthImageView(), VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL);
depthResource.width = renderSize.width;
depthResource.height = renderSize.height;
depthResource.nativeFormat = m_gBuffers->getDepthFormat();
depthResource.mipLevels = 1;
depthResource.arrayLayers = 1;
depthResource.usage = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT
| VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT; // See nvvkhl::GBuffer::create
sl::Resource motionVectorsResource(sl::ResourceType::eTex2d, m_gBuffers->getColorImage(1), nullptr,
m_gBuffers->getColorImageView(1), VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
motionVectorsResource.width = renderSize.width;
motionVectorsResource.height = renderSize.height;
motionVectorsResource.nativeFormat = m_gBuffers->getColorFormat(1);
motionVectorsResource.mipLevels = 1;
motionVectorsResource.arrayLayers = 1;
motionVectorsResource.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_STORAGE_BIT
| VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT; // See nvvkhl::GBuffer::create
const sl::ResourceTag tags[] = {
sl::ResourceTag(&colorInputResource, sl::kBufferTypeScalingInputColor, sl::ResourceLifecycle::eValidUntilPresent),
sl::ResourceTag(&colorOutputResource, sl::kBufferTypeScalingOutputColor, sl::ResourceLifecycle::eValidUntilPresent),
sl::ResourceTag(&depthResource, sl::kBufferTypeDepth, sl::ResourceLifecycle::eValidUntilPresent),
sl::ResourceTag(&motionVectorsResource, sl::kBufferTypeMotionVectors, sl::ResourceLifecycle::eValidUntilPresent),
};
slSetTag(m_viewportHandle, tags, static_cast<uint32_t>(std::size(tags)), cmd);
}
if(m_dlssOptions.mode != sl::DLSSMode::eOff)
{
nvvk::cmdBarrierImageLayout(cmd, m_outputImage.image, VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
const sl::BaseStructure* inputs[] = {&m_viewportHandle};
if(SL_FAILED(res, slEvaluateFeature(sl::kFeatureDLSS, *frame, inputs, static_cast<uint32_t>(std::size(inputs)), cmd)))
{
LOGE("Streamline: Failed to evaluate DLSS Super Resolution (%d)\n", res);
}
}
else
{
nvvk::cmdBarrierImageLayout(cmd, m_outputImage.image, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
// When DLSS Super Resolution is off, 'm_outputImage' already points to 'm_gBuffers->getColorImage()', so no additional processing needed here
}
// Post-processing
{
nvvk::cmdBarrierImageLayout(cmd, m_swapChain.getActiveImage(), VK_IMAGE_LAYOUT_PRESENT_SRC_KHR,
VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
const nvvk::createRenderingInfo renderingInfo({{0, 0}, getSize()}, {m_swapChain.getActiveImageView()}, VK_NULL_HANDLE,
VK_ATTACHMENT_LOAD_OP_CLEAR, VK_ATTACHMENT_LOAD_OP_DONT_CARE);
vkCmdBeginRendering(cmd, &renderingInfo);
const VkViewport viewport = {
0.0f, 0.0f, static_cast<float>(outputSize.width), static_cast<float>(outputSize.height), 0.0f, 1.0f};
vkCmdSetViewport(cmd, 0, 1, &viewport);
const VkRect2D scissor = {{0, 0}, {outputSize.width, outputSize.height}};
vkCmdSetScissor(cmd, 0, 1, &scissor);
vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, m_postPipeline);
vkCmdBindDescriptorSets(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, m_dset->getPipeLayout(), 0, m_dset->getSetsCount(),
m_dset->getSets(), 0, nullptr);
vkCmdDraw(cmd, 3, 1, 0, 0);
vkCmdEndRendering(cmd);
}
// Tag current state of additional resources needed for DLSS Frame Generation
{
sl::Resource colorResource(sl::ResourceType::eTex2d, m_outputImage.image, nullptr, m_outputImageView,
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
colorResource.width = outputSize.width;
colorResource.height = outputSize.height;
colorResource.nativeFormat = SAMPLE_COLOR_FORMATS[0];
colorResource.mipLevels = 1;
colorResource.arrayLayers = 1;
colorResource.usage = VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_STORAGE_BIT; // See createImages below
const sl::ResourceTag tags[] = {
sl::ResourceTag(&colorResource, sl::kBufferTypeHUDLessColor, sl::ResourceLifecycle::eValidUntilPresent),
};
slSetTag(m_viewportHandle, tags, static_cast<uint32_t>(std::size(tags)), cmd);
}
// ImGui rendering
if(ImDrawData* const drawData = ImGui::GetDrawData();
drawData != nullptr && drawData->TotalVtxCount != 0 && drawData->TotalIdxCount != 0)
{
const nvvk::createRenderingInfo renderingInfo({{0, 0}, getSize()}, {m_swapChain.getActiveImageView()}, VK_NULL_HANDLE,
VK_ATTACHMENT_LOAD_OP_LOAD, VK_ATTACHMENT_LOAD_OP_DONT_CARE);
vkCmdBeginRendering(cmd, &renderingInfo);
ImGui_ImplVulkan_RenderDrawData(drawData, cmd);
vkCmdEndRendering(cmd);
}
nvvk::cmdBarrierImageLayout(cmd, m_swapChain.getActiveImage(), VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
VK_IMAGE_LAYOUT_PRESENT_SRC_KHR);
// Update previous matrices for next frame
m_projMatrixPrev = projMatrix;
m_viewMatrixPrev = viewMatrix;
}
void drawGui()
{
ImGui::SetNextWindowSize(ImVec2(200, 500), ImGuiCond_FirstUseEver);
ImGui::Begin("Settings");
// The framerate calculated by the application does not account for the additional present calls introduced by DLSS Frame Generation, so need to adjust it accordingly
uint32_t numFramesActuallyPresented = 1;
if(m_dlssgSupported == sl::Result::eOk)
{
sl::DLSSGState dlssgState;
if(SL_FAILED(res, slDLSSGGetState(m_viewportHandle, dlssgState, &m_dlssgOptions))) // Only call this once per frame!
{
LOGE("Streamline: Failed to get DLSS Frame Generation state (%d)\n", res);
}
else if(dlssgState.status != sl::DLSSGStatus::eOk)
{
LOGE("Streamline: DLSS Frame Generation status is %u\n", dlssgState.status);
// Turn off DLSS Frame Generation if something went wrong
m_dlssgOptions.mode = sl::DLSSGMode::eOff;
slDLSSGSetOptions(m_viewportHandle, m_dlssgOptions);
}
numFramesActuallyPresented = std::max(dlssgState.numFramesActuallyPresented, 1u);
}
ImGui::Text("FPS: %f\n", static_cast<double>(ImGui::GetIO().Framerate * numFramesActuallyPresented));
if(ImGui::CollapsingHeader("Reflex"))
{
ImGui::PushID("Reflex");
bool modified = false;
modified |= ImGui::Combo("Mode", reinterpret_cast<int*>(&m_reflexOptions.mode), "Off\0Low Latency\0Low Latency with Boost\0");
if(int fps = m_reflexOptions.frameLimitUs != 0 ? static_cast<int>((1000.0f / m_reflexOptions.frameLimitUs) * 1000.0f) : 0;
ImGui::InputInt("FPS Limit", &fps, 1, 100, ImGuiInputTextFlags_EnterReturnsTrue))
{
// Clamp possible FPS range
if(fps < 0)
fps = 0;
if(fps > 200)
fps = 200;
m_reflexOptions.frameLimitUs = static_cast<uint32_t>((1000.0f / fps) * 1000.0f);
modified = true;
}
if(modified)
{
if(SL_FAILED(res, slReflexSetOptions(m_reflexOptions)))
{
LOGE("Streamline: Failed to set Reflex options (%d)\n", res);
}
}
ImGui::PopID();
}
if(ImGui::CollapsingHeader("DLSS Super Resolution"))
{
ImGui::PushID("DLSS Super Resolution");
if(m_dlssSupported == sl::Result::eOk)
{
bool modified = false;
modified |= ImGui::Combo("Mode", reinterpret_cast<int*>(&m_dlssOptions.mode),
"Off\0Performance\0Balanced\0Quality\0Ultra Performance\0Ultra Quality\0DLAA\0");
modified |= ImGui::SliderFloat("Sharpness", &m_dlssOptions.sharpness, 0.0f, 1.0f);
if(modified)
{
createImages(getSize());
}
}
else
{
ImGui::TextWrapped("DLSS Super Resolution is not supported on this adapter (return code %d)", m_dlssSupported);
}
ImGui::PopID();
}
if(ImGui::CollapsingHeader("DLSS Frame Generation"))
{
ImGui::PushID("DLSS Frame Generation");
if(m_dlssgSupported == sl::Result::eOk)
{
bool modified = false;
modified |= ImGui::Checkbox("Enabled", reinterpret_cast<bool*>(&m_dlssgOptions.mode));
if(modified)
{
// DLSS Frame Generation requires Reflex to be on
if(m_dlssgOptions.mode != sl::DLSSGMode::eOff && m_reflexOptions.mode == sl::ReflexMode::eOff)
{
m_reflexOptions.mode = sl::ReflexMode::eLowLatency;
slReflexSetOptions(m_reflexOptions);
}
if(SL_FAILED(res, slDLSSGSetOptions(m_viewportHandle, m_dlssgOptions)))
{
LOGE("Streamline: Failed to set DLSS Frame Generation options (%d)\n", res);
}
}
}
else
{
if(m_dlssgSupported == sl::Result::eErrorOSDisabledHWS)
{
ImGui::TextWrapped(
"DLSS Frame Generation is not supported because hardware-accelerated GPU scheduling is not enabled: "
"https://devblogs.microsoft.com/directx/hardware-accelerated-gpu-scheduling/");
}
else
{
ImGui::TextWrapped("DLSS Frame Generation is not supported on this adapter (return code %d)", m_dlssgSupported);
}
}
ImGui::PopID();
}
ImGui::End();
}
private:
void createScene()
{
// Create meshes
m_sceneMeshes.emplace_back(nvh::createSphereUv());
m_sceneMeshes.emplace_back(nvh::createCube());
m_sceneMeshes.emplace_back(nvh::createTetrahedron());
m_sceneMeshes.emplace_back(nvh::createOctahedron());
m_sceneMeshes.emplace_back(nvh::createIcosahedron());
m_sceneMeshes.emplace_back(nvh::createConeMesh());
const int num_meshes = static_cast<int>(m_sceneMeshes.size());
const VkCommandBuffer cmd = createTempCmdBuffer();
for(int i = 0; i < num_meshes; i++)
{
PrimitiveMeshVk& mesh = m_sceneMeshes[i];
mesh.verticesBuffer = m_alloc->createBuffer(cmd, mesh.vertices, VK_BUFFER_USAGE_VERTEX_BUFFER_BIT);
mesh.trianglesBuffer = m_alloc->createBuffer(cmd, mesh.triangles, VK_BUFFER_USAGE_INDEX_BUFFER_BIT);
}
m_frameInfo = m_alloc->createBuffer(sizeof(FrameInfo), VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT);
submitTempCmdBuffer(cmd);
// Create instances/nodes
for(int i = 0; i < num_meshes; i++)
{
Node& node = m_sceneNodes.emplace_back();
node.mesh = i;
node.material = i;
node.translation = glm::vec3(-(static_cast<float>(num_meshes) * 0.5f) + static_cast<float>(i), 0.0f, 0.0f);
node.motion = true;
}
Node& background = m_sceneNodes.emplace_back();
background.mesh = 1;
background.translation = {0.0f, 0.0f, -5.0f};
background.scale = {50, 50, 50};
CameraManip.setClipPlanes({0.1f, 100.0f});
CameraManip.setLookat({0.0f, 0.0f, 5.0f}, {0.0f, 0.0f, 0.0f}, {0.0f, 1.0f, 0.0f});
}
void createPipelines()
{
m_dset->addBinding(0, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT);
m_dset->addBinding(1, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT);
m_dset->initLayout();
m_dset->initPool(1);
const VkPushConstantRange pushConstantRange = {VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0, sizeof(NodeInfo)};
m_dset->initPipeLayout(1, &pushConstantRange);
// Update descriptor set
{
const VkDescriptorBufferInfo frameInfoBufferInfo = {m_frameInfo.buffer, 0, VK_WHOLE_SIZE};
const VkWriteDescriptorSet frameInfoWrite = m_dset->makeWrite(0, 0, &frameInfoBufferInfo);
vkUpdateDescriptorSets(m_device, 1, &frameInfoWrite, 0, nullptr);
}
// Create the scene rendering pipeline
{
nvvk::GraphicsPipelineState pipelineState;
pipelineState.rasterizationState.cullMode = VK_CULL_MODE_NONE;
pipelineState.addBindingDescriptions({{0, sizeof(nvh::PrimitiveVertex)}});
pipelineState.addAttributeDescriptions({
{0, 0, VK_FORMAT_R32G32B32_SFLOAT, static_cast<uint32_t>(offsetof(nvh::PrimitiveVertex, p))}, // Position
{1, 0, VK_FORMAT_R32G32B32_SFLOAT, static_cast<uint32_t>(offsetof(nvh::PrimitiveVertex, n))}, // Normal
});
pipelineState.clearBlendAttachmentStates();
for(uint32_t i = 0; i < std::size(SAMPLE_COLOR_FORMATS); i++)
{
pipelineState.addBlendAttachmentState(nvvk::GraphicsPipelineState::makePipelineColorBlendAttachmentState());
}
VkPipelineRenderingCreateInfo renderingInfo = {VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO_KHR};
renderingInfo.colorAttachmentCount = static_cast<uint32_t>(std::size(SAMPLE_COLOR_FORMATS));
renderingInfo.pColorAttachmentFormats = SAMPLE_COLOR_FORMATS;
renderingInfo.depthAttachmentFormat = SAMPLE_DEPTH_FORMAT;
nvvk::GraphicsPipelineGenerator pipelineGenerator(m_device, m_dset->getPipeLayout(), renderingInfo, pipelineState);
pipelineGenerator.addShader(std::vector<uint32_t>{std::begin(scene_vert), std::end(scene_vert)}, VK_SHADER_STAGE_VERTEX_BIT);
pipelineGenerator.addShader(std::vector<uint32_t>{std::begin(scene_frag), std::end(scene_frag)}, VK_SHADER_STAGE_FRAGMENT_BIT);
m_scenePipeline = pipelineGenerator.createPipeline();
}
// Create the post-processing pipeline
{
nvvk::GraphicsPipelineState pipelineState;
pipelineState.rasterizationState.cullMode = VK_CULL_MODE_NONE;
const VkFormat colorFormat = m_swapChain.getFormat();
VkPipelineRenderingCreateInfo renderingInfo = {VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO_KHR};
renderingInfo.colorAttachmentCount = 1;
renderingInfo.pColorAttachmentFormats = &colorFormat;
nvvk::GraphicsPipelineGenerator pipelineGenerator(m_device, m_dset->getPipeLayout(), renderingInfo, pipelineState);
pipelineGenerator.addShader(std::vector<uint32_t>{std::begin(post_vert), std::end(post_vert)}, VK_SHADER_STAGE_VERTEX_BIT);
pipelineGenerator.addShader(std::vector<uint32_t>{std::begin(post_frag), std::end(post_frag)}, VK_SHADER_STAGE_FRAGMENT_BIT);
m_postPipeline = pipelineGenerator.createPipeline();
}
}
void createImages(const VkExtent2D& size)
{
vkDeviceWaitIdle(m_device);
destroyImages();
// Update output dimensions for DLSS Super Resolution
m_dlssOptions.outputWidth = size.width;
m_dlssOptions.outputHeight = size.height;
m_dlssOptions.colorBuffersHDR =
SAMPLE_COLOR_FORMATS[0] >= VK_FORMAT_A2R10G10B10_UNORM_PACK32 ? sl::Boolean::eTrue : sl::Boolean::eFalse;
if(SL_FAILED(res, slDLSSSetOptions(m_viewportHandle, m_dlssOptions)))
{
LOGE("Streamline: Failed to set DLSS Super Resolution options (%d)\n", res);
}
sl::DLSSOptimalSettings dlssSettings;
if(SL_FAILED(res, slDLSSGetOptimalSettings(m_dlssOptions, dlssSettings)) || m_dlssOptions.mode == sl::DLSSMode::eOff
|| dlssSettings.optimalRenderWidth == 0 || dlssSettings.optimalRenderHeight == 0)
{
// Default render dimensions to the window dimensions if DLSS is not enabled
dlssSettings.optimalRenderWidth = size.width;
dlssSettings.optimalRenderHeight = size.height;
}
const VkExtent2D renderSize = {dlssSettings.optimalRenderWidth, dlssSettings.optimalRenderHeight};
m_gBuffers = std::make_unique<nvvkhl::GBuffer>(
m_device, m_alloc.get(), renderSize,
std::vector<VkFormat>(std::begin(SAMPLE_COLOR_FORMATS), std::end(SAMPLE_COLOR_FORMATS)), SAMPLE_DEPTH_FORMAT);
if(m_dlssOptions.mode != sl::DLSSMode::eOff)
{
// The image DLSS Super Resolution outputs to must have the VK_IMAGE_USAGE_STORAGE_BIT usage flag, or else nothing will be rendered to it!
const VkImageCreateInfo outputCreateInfo =
nvvk::makeImage2DCreateInfo(size, SAMPLE_COLOR_FORMATS[0], VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_STORAGE_BIT);
m_outputImage = m_alloc->createImage(outputCreateInfo);
const VkImageViewCreateInfo outputViewCreateInfo =
nvvk::makeImage2DViewCreateInfo(m_outputImage.image, outputCreateInfo.format);
NVVK_CHECK(vkCreateImageView(m_device, &outputViewCreateInfo, nullptr, &m_outputImageView));
}
else
{
m_outputImage.image = m_gBuffers->getColorImage();
m_outputImageView = m_gBuffers->getColorImageView();
}
// Update descriptor set with the new output image
{
const VkDescriptorImageInfo outputImageInfo = {m_defaultSampler, m_outputImageView, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL};
const VkWriteDescriptorSet outputImageWrite = m_dset->makeWrite(0, 1, &outputImageInfo);
vkUpdateDescriptorSets(m_device, 1, &outputImageWrite, 0, nullptr);
}
}
void destroyScene()
{
for(PrimitiveMeshVk& mesh : m_sceneMeshes)
{
m_alloc->destroy(mesh.verticesBuffer);
m_alloc->destroy(mesh.trianglesBuffer);
}
m_sceneNodes.clear();
m_sceneMeshes.clear();
m_alloc->destroy(m_frameInfo);
}
void destroyPipelines()
{
vkDestroyPipeline(m_device, m_scenePipeline, nullptr);
m_scenePipeline = VK_NULL_HANDLE;
vkDestroyPipeline(m_device, m_postPipeline, nullptr);
m_postPipeline = VK_NULL_HANDLE;
}
void destroyImages()
{
if(m_outputImage.memHandle != nullptr)
{
vkDestroyImageView(m_device, m_outputImageView, nullptr);
m_alloc->destroy(m_outputImage);
}
else
{
m_outputImage.image = VK_NULL_HANDLE;
}
m_outputImageView = VK_NULL_HANDLE;
m_gBuffers.reset();
}
sl::Result m_dlssSupported = sl::Result::eOk;
sl::Result m_dlssgSupported = sl::Result::eOk;
sl::DLSSOptions m_dlssOptions;
sl::DLSSGOptions m_dlssgOptions;
sl::ReflexOptions m_reflexOptions;
sl::ViewportHandle m_viewportHandle;
std::unique_ptr<nvvk::DescriptorSetContainer> m_dset;
std::unique_ptr<nvvk::ResourceAllocator> m_alloc;
VkSampler m_defaultSampler = VK_NULL_HANDLE;
struct PrimitiveMeshVk : nvh::PrimitiveMesh
{
PrimitiveMeshVk(const nvh::PrimitiveMesh& mesh)
: PrimitiveMesh(mesh)
{
}
nvvk::Buffer verticesBuffer;
nvvk::Buffer trianglesBuffer;
};
std::vector<PrimitiveMeshVk> m_sceneMeshes;
struct Node : nvh::Node
{
bool motion = false;
};
std::vector<Node> m_sceneNodes;
nvvk::Buffer m_frameInfo;
VkPipeline m_scenePipeline = VK_NULL_HANDLE;
VkPipeline m_postPipeline = VK_NULL_HANDLE;
std::unique_ptr<nvvkhl::GBuffer> m_gBuffers;
nvvk::Image m_outputImage;
VkImageView m_outputImageView = VK_NULL_HANDLE;
float m_animationTime = 0.0f;
float m_animationTimePrev = 0.0f;
glm::mat4 m_projMatrixPrev;
glm::mat4 m_viewMatrixPrev;
};
int main(int argc, char** argv)
{
// Setup GLFW window
if(!glfwInit())
{
LOGE("GLFW: Initialization failed\n");
return static_cast<int>(sl::Result::eErrorNotInitialized);
}
if(!glfwVulkanSupported())
{
LOGE("GLFW: Vulkan not supported\n");
return static_cast<int>(sl::Result::eErrorAdapterNotSupported);
}
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
GLFWwindow* const window = glfwCreateWindow(SAMPLE_WIDTH, SAMPLE_HEIGHT, PROJECT_NAME, nullptr, nullptr);
if(window == nullptr)
{
LOGE("GLFW: Failed to create window\n");
return static_cast<int>(sl::Result::eErrorNotInitialized);
}
// Initialize Streamline (this must happen before any Vulkan calls are made)
sl::Preferences pref;
pref.showConsole = true;
pref.logLevel = sl::LogLevel::eVerbose;
#if SL_MANUAL_HOOKING
pref.flags |= sl::PreferenceFlags::eUseManualHooking;
#endif
pref.featuresToLoad = SL_FEATURES;
pref.numFeaturesToLoad = static_cast<uint32_t>(std::size(SL_FEATURES));
pref.applicationId = 231313132;
pref.engine = sl::EngineType::eCustom;
pref.engineVersion = 0;
pref.renderAPI = sl::RenderAPI::eVulkan;
if(SL_FAILED(res, slInit(pref)))
{
LOGE("Streamline: Initialization failed (%d)\n", res);
return static_cast<int>(res);
}
nvvk::ContextCreateInfo contextInfo(/* bUseValidation = */ false);
contextInfo.setVersion(1, 3);
// Add Vulkan extensions required by GLFW
{
contextInfo.addDeviceExtension(VK_KHR_SWAPCHAIN_EXTENSION_NAME);
uint32_t vkNumInstanceExtensions = 0;
const char* const* const vkInstanceExtensions = glfwGetRequiredInstanceExtensions(&vkNumInstanceExtensions);
for(uint32_t i = 0; i < vkNumInstanceExtensions; i++)
contextInfo.addInstanceExtension(vkInstanceExtensions[i]);
}
bool useVsync = false;
#if SL_MANUAL_HOOKING
VkPhysicalDeviceOpticalFlowFeaturesNV opticalFlowFeatures = {VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_OPTICAL_FLOW_FEATURES_NV};
// Add Vulkan extensions required by Streamline features
for(const sl::Feature feature : SL_FEATURES)
{
sl::FeatureRequirements requirements;
if(SL_FAILED(res, slGetFeatureRequirements(feature, requirements)))
{
LOGE("Streamline: Failed to get feature requirements for feature %u (%d)\n", feature, res);
return static_cast<int>(res);
}
if((requirements.flags & sl::FeatureRequirementFlags::eVulkanSupported) == 0)
{
LOGE("Streamline: Feature %u is not supported on Vulkan\n", feature);
return static_cast<int>(sl::Result::eErrorFeatureNotSupported);
}
if((requirements.flags & sl::FeatureRequirementFlags::eVSyncOffRequired) != 0)
useVsync = false;
if(requirements.vkNumComputeQueuesRequired != 0)
contextInfo.addRequestedQueue(VK_QUEUE_COMPUTE_BIT, requirements.vkNumComputeQueuesRequired);
if(requirements.vkNumGraphicsQueuesRequired != 0)
contextInfo.addRequestedQueue(VK_QUEUE_GRAPHICS_BIT, requirements.vkNumGraphicsQueuesRequired);
if(requirements.vkNumOpticalFlowQueuesRequired != 0)
contextInfo.addRequestedQueue(VK_QUEUE_OPTICAL_FLOW_BIT_NV, requirements.vkNumOpticalFlowQueuesRequired);
for(uint32_t i = 0; i < requirements.vkNumDeviceExtensions; i++)
{
void* featureStruct = nullptr;
if(strcmp(requirements.vkDeviceExtensions[i], VK_NV_OPTICAL_FLOW_EXTENSION_NAME) == 0)
{
featureStruct = &opticalFlowFeatures;
opticalFlowFeatures.opticalFlow = VK_TRUE;
}
contextInfo.addDeviceExtension(requirements.vkDeviceExtensions[i], false, featureStruct);
}
for(uint32_t i = 0; i < requirements.vkNumInstanceExtensions; i++)
{
contextInfo.addInstanceExtension(requirements.vkInstanceExtensions[i]);
}
}
#endif
// Create Vulkan device and queues
nvvk::Context context;
if(!context.init(contextInfo))
{
return static_cast<int>(sl::Result::eErrorVulkanAPI);
}
// Verify that the requested features are actually supported on the created device
sl::AdapterInfo adapter;
adapter.vkPhysicalDevice = context.m_physicalDevice;
// This sample can optionally run without DLSS, but it requires Reflex
sl::Result dlssSupported = sl::Result::eOk;
sl::Result dlssgSupported = sl::Result::eOk;
for(const sl::Feature feature : SL_FEATURES)
{
if(SL_FAILED(res, slIsFeatureSupported(feature, adapter)))
{
if(res == sl::Result::eErrorOSDisabledHWS)
{
LOGW("Streamline: Feature %u is not supported because hardware-accelerated GPU scheduling is not enabled: https://devblogs.microsoft.com/directx/hardware-accelerated-gpu-scheduling/.\n",
feature);
}
else
{
LOGE(
"Streamline: Feature %u is not supported on this adapter (return code %d). "
"The log messages from Streamline may include more information.\n",
feature, res);
}
switch(feature)
{
case sl::kFeatureDLSS:
LOGW("This sample can still run, but DLSS Super Resolution will not be available\n");
dlssSupported = res;
break;
case sl::kFeatureDLSS_G:
LOGW("This sample can still run, but DLSS Frame Generation will not be available\n");
dlssgSupported = res;
break;
default:
return static_cast<int>(res);
}
}