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hpp_api_vulkan_sample.cpp
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/* Copyright (c) 2021-2024, NVIDIA CORPORATION. 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.
*/
#include <hpp_api_vulkan_sample.h>
#include <common/hpp_vk_common.h>
#include <core/hpp_buffer.h>
#include <hpp_gltf_loader.h>
// Instantiate the default dispatcher
VULKAN_HPP_DEFAULT_DISPATCH_LOADER_DYNAMIC_STORAGE
bool HPPApiVulkanSample::prepare(const vkb::ApplicationOptions &options)
{
if (!vkb::VulkanSampleCpp::prepare(options))
{
return false;
}
depth_format = vkb::common::get_suitable_depth_format(get_device().get_gpu().get_handle());
// Create synchronization objects
// Create a semaphore used to synchronize image presentation
// Ensures that the current swapchain render target has completed presentation and has been released by the presentation engine, ready for rendering
semaphores.acquired_image_ready = get_device().get_handle().createSemaphore({});
// Create a semaphore used to synchronize command submission
// Ensures that the image is not presented until all commands have been sumbitted and executed
semaphores.render_complete = get_device().get_handle().createSemaphore({});
// Set up submit info structure
// Semaphores will stay the same during application lifetime
// Command buffer submission info is set by each example
submit_info = vk::SubmitInfo();
submit_info.pWaitDstStageMask = &submit_pipeline_stages;
if (window->get_window_mode() != vkb::Window::Mode::Headless)
{
submit_info.setWaitSemaphores(semaphores.acquired_image_ready);
submit_info.setSignalSemaphores(semaphores.render_complete);
}
queue = get_device().get_suitable_graphics_queue().get_handle();
create_swapchain_buffers();
create_command_pool();
create_command_buffers();
create_synchronization_primitives();
setup_depth_stencil();
setup_render_pass();
create_pipeline_cache();
setup_framebuffer();
extent = get_render_context().get_surface_extent();
prepare_gui();
return true;
}
void HPPApiVulkanSample::prepare_gui()
{
create_gui(*window, nullptr, 15.0f, true);
get_gui().prepare(pipeline_cache,
render_pass,
{static_cast<VkPipelineShaderStageCreateInfo>(load_shader("uioverlay/uioverlay.vert", vk::ShaderStageFlagBits::eVertex)),
static_cast<VkPipelineShaderStageCreateInfo>(load_shader("uioverlay/uioverlay.frag", vk::ShaderStageFlagBits::eFragment))});
}
void HPPApiVulkanSample::update(float delta_time)
{
if (view_updated)
{
view_updated = false;
view_changed();
}
render(delta_time);
camera.update(delta_time);
if (camera.moving())
{
view_updated = true;
}
}
bool HPPApiVulkanSample::resize(const uint32_t, const uint32_t)
{
if (!prepared)
{
return false;
}
get_render_context().handle_surface_changes();
// Don't recreate the swapchain if the dimensions haven't changed
if (extent == get_render_context().get_surface_extent())
{
return false;
}
extent = get_render_context().get_surface_extent();
prepared = false;
// Ensure all operations on the device have been finished before destroying resources
get_device().get_handle().waitIdle();
create_swapchain_buffers();
// Recreate the frame buffers
get_device().get_handle().destroyImageView(depth_stencil.view);
get_device().get_handle().destroyImage(depth_stencil.image);
get_device().get_handle().freeMemory(depth_stencil.mem);
setup_depth_stencil();
for (uint32_t i = 0; i < framebuffers.size(); i++)
{
get_device().get_handle().destroyFramebuffer(framebuffers[i]);
framebuffers[i] = nullptr;
}
setup_framebuffer();
if (extent.width && extent.height && has_gui())
{
get_gui().resize(extent.width, extent.height);
}
rebuild_command_buffers();
get_device().get_handle().waitIdle();
if (extent.width && extent.height)
{
camera.update_aspect_ratio(static_cast<float>(extent.width) / static_cast<float>(extent.height));
}
// Notify derived class
view_changed();
prepared = true;
return true;
}
void HPPApiVulkanSample::create_render_context()
{
// We always want an sRGB surface to match the display.
// If we used a UNORM surface, we'd have to do the conversion to sRGB ourselves at the end of our fragment shaders.
auto surface_priority_list = std::vector<vk::SurfaceFormatKHR>{{vk::Format::eB8G8R8A8Srgb, vk::ColorSpaceKHR::eSrgbNonlinear},
{vk::Format::eR8G8B8A8Srgb, vk::ColorSpaceKHR::eSrgbNonlinear}};
vkb::VulkanSampleCpp::create_render_context(surface_priority_list);
}
void HPPApiVulkanSample::prepare_render_context()
{
vkb::VulkanSampleCpp::prepare_render_context();
}
void HPPApiVulkanSample::input_event(const vkb::InputEvent &input_event)
{
vkb::VulkanSampleCpp::input_event(input_event);
bool gui_captures_event = false;
if (has_gui())
{
gui_captures_event = get_gui().input_event(input_event);
}
if (!gui_captures_event)
{
if (input_event.get_source() == vkb::EventSource::Mouse)
{
const auto &mouse_button = static_cast<const vkb::MouseButtonInputEvent &>(input_event);
handle_mouse_move(static_cast<int32_t>(mouse_button.get_pos_x()), static_cast<int32_t>(mouse_button.get_pos_y()));
if (mouse_button.get_action() == vkb::MouseAction::Down)
{
switch (mouse_button.get_button())
{
case vkb::MouseButton::Left:
mouse_buttons.left = true;
break;
case vkb::MouseButton::Right:
mouse_buttons.right = true;
break;
case vkb::MouseButton::Middle:
mouse_buttons.middle = true;
break;
default:
break;
}
}
else if (mouse_button.get_action() == vkb::MouseAction::Up)
{
switch (mouse_button.get_button())
{
case vkb::MouseButton::Left:
mouse_buttons.left = false;
break;
case vkb::MouseButton::Right:
mouse_buttons.right = false;
break;
case vkb::MouseButton::Middle:
mouse_buttons.middle = false;
break;
default:
break;
}
}
}
else if (input_event.get_source() == vkb::EventSource::Touchscreen)
{
const auto &touch_event = static_cast<const vkb::TouchInputEvent &>(input_event);
if (touch_event.get_action() == vkb::TouchAction::Down)
{
touch_down = true;
touch_pos.x = static_cast<int32_t>(touch_event.get_pos_x());
touch_pos.y = static_cast<int32_t>(touch_event.get_pos_y());
mouse_pos.x = touch_event.get_pos_x();
mouse_pos.y = touch_event.get_pos_y();
mouse_buttons.left = true;
}
else if (touch_event.get_action() == vkb::TouchAction::Up)
{
touch_pos.x = static_cast<int32_t>(touch_event.get_pos_x());
touch_pos.y = static_cast<int32_t>(touch_event.get_pos_y());
touch_timer = 0.0;
touch_down = false;
camera.keys.up = false;
mouse_buttons.left = false;
}
else if (touch_event.get_action() == vkb::TouchAction::Move)
{
bool handled = false;
if (has_gui())
{
ImGuiIO &io = ImGui::GetIO();
handled = io.WantCaptureMouse;
}
if (!handled)
{
int32_t eventX = static_cast<int32_t>(touch_event.get_pos_x());
int32_t eventY = static_cast<int32_t>(touch_event.get_pos_y());
float deltaX = static_cast<float>(touch_pos.y - eventY) * rotation_speed * 0.5f;
float deltaY = static_cast<float>(touch_pos.x - eventX) * rotation_speed * 0.5f;
camera.rotate(glm::vec3(deltaX, 0.0f, 0.0f));
camera.rotate(glm::vec3(0.0f, -deltaY, 0.0f));
rotation.x += deltaX;
rotation.y -= deltaY;
view_changed();
touch_pos.x = eventX;
touch_pos.y = eventY;
}
}
}
else if (input_event.get_source() == vkb::EventSource::Keyboard)
{
const auto &key_button = static_cast<const vkb::KeyInputEvent &>(input_event);
if (key_button.get_action() == vkb::KeyAction::Down)
{
switch (key_button.get_code())
{
case vkb::KeyCode::W:
camera.keys.up = true;
break;
case vkb::KeyCode::S:
camera.keys.down = true;
break;
case vkb::KeyCode::A:
camera.keys.left = true;
break;
case vkb::KeyCode::D:
camera.keys.right = true;
break;
case vkb::KeyCode::P:
paused = !paused;
break;
case vkb::KeyCode::F1:
if (has_gui())
{
get_gui().visible = !get_gui().visible;
}
default:
break;
}
}
else if (key_button.get_action() == vkb::KeyAction::Up)
{
switch (key_button.get_code())
{
case vkb::KeyCode::W:
camera.keys.up = false;
break;
case vkb::KeyCode::S:
camera.keys.down = false;
break;
case vkb::KeyCode::A:
camera.keys.left = false;
break;
case vkb::KeyCode::D:
camera.keys.right = false;
break;
default:
break;
}
}
}
}
}
void HPPApiVulkanSample::handle_mouse_move(int32_t x, int32_t y)
{
int32_t dx = static_cast<int32_t>(mouse_pos.x) - x;
int32_t dy = static_cast<int32_t>(mouse_pos.y) - y;
bool handled = false;
if (has_gui())
{
ImGuiIO &io = ImGui::GetIO();
handled = io.WantCaptureMouse;
}
mouse_moved(static_cast<float>(x), static_cast<float>(y), handled);
if (handled)
{
mouse_pos = glm::vec2(static_cast<float>(x), static_cast<float>(y));
return;
}
if (mouse_buttons.left)
{
rotation.x += dy * 1.25f * rotation_speed;
rotation.y -= dx * 1.25f * rotation_speed;
camera.rotate(glm::vec3(dy * camera.rotation_speed, -dx * camera.rotation_speed, 0.0f));
view_updated = true;
}
if (mouse_buttons.right)
{
zoom += dy * .005f * zoom_speed;
camera.translate(glm::vec3(-0.0f, 0.0f, dy * .005f * zoom_speed));
view_updated = true;
}
if (mouse_buttons.middle)
{
camera_pos.x -= dx * 0.01f;
camera_pos.y -= dy * 0.01f;
camera.translate(glm::vec3(-dx * 0.01f, -dy * 0.01f, 0.0f));
view_updated = true;
}
mouse_pos = glm::vec2(static_cast<float>(x), static_cast<float>(y));
}
void HPPApiVulkanSample::mouse_moved(double x, double y, bool &handled)
{}
bool HPPApiVulkanSample::check_command_buffers()
{
for (auto &command_buffer : draw_cmd_buffers)
{
if (command_buffer)
{
return false;
}
}
return true;
}
void HPPApiVulkanSample::create_command_buffers()
{
// Create one command buffer for each swap chain image and reuse for rendering
vk::CommandBufferAllocateInfo allocate_info(
cmd_pool, vk::CommandBufferLevel::ePrimary, static_cast<uint32_t>(get_render_context().get_render_frames().size()));
draw_cmd_buffers = get_device().get_handle().allocateCommandBuffers(allocate_info);
}
void HPPApiVulkanSample::destroy_command_buffers()
{
get_device().get_handle().freeCommandBuffers(cmd_pool, draw_cmd_buffers);
}
void HPPApiVulkanSample::create_pipeline_cache()
{
pipeline_cache = get_device().get_handle().createPipelineCache({});
}
vk::PipelineShaderStageCreateInfo HPPApiVulkanSample::load_shader(const std::string &file, vk::ShaderStageFlagBits stage, vkb::ShaderSourceLanguage src_language)
{
shader_modules.push_back(vkb::common::load_shader(file.c_str(), get_device().get_handle(), stage, src_language));
assert(shader_modules.back());
return vk::PipelineShaderStageCreateInfo({}, stage, shader_modules.back(), "main");
}
vk::PipelineShaderStageCreateInfo HPPApiVulkanSample::load_shader(const std::string &sample_folder_name, const std::string &shader_filename, vk::ShaderStageFlagBits stage)
{
// Note: this can be reworked once offline compilation for GLSL shaders is added
// Default to GLSL
std::string shader_folder{"glsl"};
std::string shader_extension{""};
vkb::ShaderSourceLanguage src_language = vkb::ShaderSourceLanguage::GLSL;
if (get_shading_language() == vkb::ShadingLanguage::HLSL)
{
shader_folder = "hlsl";
// HLSL shaders are offline compiled to SPIR-V, so source is SPV
src_language = vkb::ShaderSourceLanguage::SPV;
shader_extension = ".spv";
}
std::string full_file_name = sample_folder_name + "/" + shader_folder + "/" + shader_filename + shader_extension;
shader_modules.push_back(vkb::common::load_shader(full_file_name, get_device().get_handle(), stage, src_language));
assert(shader_modules.back());
return vk::PipelineShaderStageCreateInfo({}, stage, shader_modules.back(), "main");
}
void HPPApiVulkanSample::update_overlay(float delta_time, const std::function<void()> &additional_ui)
{
if (has_gui())
{
frame_count++;
accumulated_time += delta_time;
if (0.5f < accumulated_time)
{
fps = static_cast<uint32_t>(frame_count / accumulated_time);
frame_count = 0;
accumulated_time = 0.0f;
}
get_gui().show_simple_window(get_name(), fps, [this, additional_ui]() { on_update_ui_overlay(get_gui().get_drawer()); });
get_gui().update(delta_time);
if (get_gui().update_buffers() || get_gui().get_drawer().is_dirty())
{
rebuild_command_buffers();
get_gui().get_drawer().clear();
}
}
}
void HPPApiVulkanSample::draw_ui(const vk::CommandBuffer command_buffer)
{
if (has_gui())
{
command_buffer.setViewport(0, vk::Viewport(0.0f, 0.0f, static_cast<float>(extent.width), static_cast<float>(extent.height), 0.0f, 1.0f));
command_buffer.setScissor(0, vk::Rect2D({0, 0}, extent));
get_gui().draw(command_buffer);
}
}
void HPPApiVulkanSample::prepare_frame()
{
if (get_render_context().has_swapchain())
{
handle_surface_changes();
// Acquire the next image from the swap chain
// Shows how to filter an error code from a vulkan function, which is mapped to an exception but should be handled here!
vk::Result result;
try
{
std::tie(result, current_buffer) = get_render_context().get_swapchain().acquire_next_image(semaphores.acquired_image_ready);
}
// Recreate the swapchain if it's no longer compatible with the surface (eErrorOutOfDateKHR)
// Don't catch other failures here, they are propagated up the calling hierarchy
catch (vk::OutOfDateKHRError & /*err*/)
{
resize(extent.width, extent.height);
}
// VK_SUBOPTIMAL_KHR is a success code and means that acquire was successful and semaphore is signaled but image is suboptimal
// allow rendering frame to suboptimal swapchain as otherwise we would have to manually unsignal semaphore and acquire image again
}
}
void HPPApiVulkanSample::submit_frame()
{
if (get_render_context().has_swapchain())
{
const auto &queue = get_device().get_queue_by_present(0);
vk::SwapchainKHR swapchain = get_render_context().get_swapchain().get_handle();
vk::PresentInfoKHR present_info({}, swapchain, current_buffer);
// Check if a wait semaphore has been specified to wait for before presenting the image
if (semaphores.render_complete)
{
present_info.setWaitSemaphores(semaphores.render_complete);
}
vk::DisplayPresentInfoKHR disp_present_info;
if (get_device().is_extension_supported(VK_KHR_DISPLAY_SWAPCHAIN_EXTENSION_NAME) &&
window->get_display_present_info(reinterpret_cast<VkDisplayPresentInfoKHR *>(&disp_present_info), extent.width, extent.height))
{
// Add display present info if supported and wanted
present_info.setPNext(&disp_present_info);
}
// Shows how to filter an error code from a vulkan function, which is mapped to an exception but should be handled here!
vk::Result present_result;
try
{
present_result = queue.present(present_info);
}
catch (const vk::SystemError &e)
{
if (e.code() == vk::Result::eErrorOutOfDateKHR)
{
// Swap chain is no longer compatible with the surface and needs to be recreated
resize(extent.width, extent.height);
return;
}
else
{
// rethrow this error
throw;
}
}
}
// DO NOT USE
// vkDeviceWaitIdle and vkQueueWaitIdle are extremely expensive functions, and are used here purely for demonstrating the vulkan API
// without having to concern ourselves with proper syncronization. These functions should NEVER be used inside the render loop like this (every frame).
get_device().get_queue_by_present(0).get_handle().waitIdle();
}
HPPApiVulkanSample::~HPPApiVulkanSample()
{
if (has_device() && get_device().get_handle())
{
vk::Device device = get_device().get_handle();
device.waitIdle();
// Clean up Vulkan resources
device.destroyDescriptorPool(descriptor_pool);
destroy_command_buffers();
device.destroyRenderPass(render_pass);
for (auto &framebuffer : framebuffers)
{
device.destroyFramebuffer(framebuffer);
}
for (auto &swapchain_buffer : swapchain_buffers)
{
device.destroyImageView(swapchain_buffer.view);
}
for (auto &shader_module : shader_modules)
{
device.destroyShaderModule(shader_module);
}
device.destroyImageView(depth_stencil.view);
device.destroyImage(depth_stencil.image);
device.freeMemory(depth_stencil.mem);
device.destroyPipelineCache(pipeline_cache);
device.destroyCommandPool(cmd_pool);
device.destroySemaphore(semaphores.acquired_image_ready);
device.destroySemaphore(semaphores.render_complete);
for (auto &fence : wait_fences)
{
device.destroyFence(fence);
}
}
}
void HPPApiVulkanSample::view_changed()
{}
void HPPApiVulkanSample::build_command_buffers()
{}
void HPPApiVulkanSample::rebuild_command_buffers()
{
get_device().get_handle().resetCommandPool(cmd_pool);
build_command_buffers();
}
void HPPApiVulkanSample::create_synchronization_primitives()
{
// Wait fences to sync command buffer access
vk::FenceCreateInfo fence_create_info(vk::FenceCreateFlagBits::eSignaled);
wait_fences.resize(draw_cmd_buffers.size());
for (auto &fence : wait_fences)
{
fence = get_device().get_handle().createFence(fence_create_info);
}
}
void HPPApiVulkanSample::create_command_pool()
{
uint32_t queue_family_index = get_device().get_queue_by_flags(vk::QueueFlagBits::eGraphics | vk::QueueFlagBits::eCompute, 0).get_family_index();
vk::CommandPoolCreateInfo command_pool_info({}, queue_family_index);
cmd_pool = get_device().get_handle().createCommandPool(command_pool_info);
}
void HPPApiVulkanSample::setup_depth_stencil()
{
std::tie(depth_stencil.image, depth_stencil.mem) =
get_device().create_image(depth_format,
get_render_context().get_surface_extent(),
1,
vk::ImageUsageFlagBits::eDepthStencilAttachment | vk::ImageUsageFlagBits::eTransferSrc,
vk::MemoryPropertyFlagBits::eDeviceLocal);
vk::ImageAspectFlags aspect_mask = vk::ImageAspectFlagBits::eDepth;
// Stencil aspect should only be set on depth + stencil formats
if ((vk::componentCount(depth_format) == 2) && (strcmp(vk::componentName(depth_format, 0), "D") == 0) &&
(strcmp(vk::componentName(depth_format, 1), "S") == 0))
{
aspect_mask |= vk::ImageAspectFlagBits::eStencil;
}
depth_stencil.view = vkb::common::create_image_view(get_device().get_handle(), depth_stencil.image, vk::ImageViewType::e2D, depth_format, aspect_mask);
}
void HPPApiVulkanSample::setup_framebuffer()
{
std::array<vk::ImageView, 2> attachments;
// Depth/Stencil attachment is the same for all frame buffers
attachments[1] = depth_stencil.view;
vk::FramebufferCreateInfo framebuffer_create_info(
{}, render_pass, attachments, get_render_context().get_surface_extent().width, get_render_context().get_surface_extent().height, 1);
// Delete existing frame buffers
for (auto &framebuffer : framebuffers)
{
get_device().get_handle().destroyFramebuffer(framebuffer);
}
framebuffers.clear();
// Create frame buffers for every swap chain image
framebuffers.reserve(swapchain_buffers.size());
for (auto &buffer : swapchain_buffers)
{
attachments[0] = buffer.view;
framebuffers.push_back(get_device().get_handle().createFramebuffer(framebuffer_create_info));
}
}
void HPPApiVulkanSample::setup_render_pass()
{
std::array<vk::AttachmentDescription, 2> attachments;
// Color attachment
attachments[0].format = get_render_context().get_format();
attachments[0].samples = vk::SampleCountFlagBits::e1;
attachments[0].loadOp = vk::AttachmentLoadOp::eClear;
attachments[0].storeOp = vk::AttachmentStoreOp::eStore;
attachments[0].stencilLoadOp = vk::AttachmentLoadOp::eDontCare;
attachments[0].stencilStoreOp = vk::AttachmentStoreOp::eDontCare;
attachments[0].initialLayout = vk::ImageLayout::eUndefined;
attachments[0].finalLayout = vk::ImageLayout::ePresentSrcKHR;
// Depth attachment
attachments[1].format = depth_format;
attachments[1].samples = vk::SampleCountFlagBits::e1;
attachments[1].loadOp = vk::AttachmentLoadOp::eClear;
attachments[1].storeOp = vk::AttachmentStoreOp::eDontCare;
attachments[1].stencilLoadOp = vk::AttachmentLoadOp::eClear;
attachments[1].stencilStoreOp = vk::AttachmentStoreOp::eDontCare;
attachments[1].initialLayout = vk::ImageLayout::eUndefined;
attachments[1].finalLayout = vk::ImageLayout::eDepthStencilAttachmentOptimal;
vk::AttachmentReference color_reference(0, vk::ImageLayout::eColorAttachmentOptimal);
vk::AttachmentReference depth_reference(1, vk::ImageLayout::eDepthStencilAttachmentOptimal);
vk::SubpassDescription subpass_description({}, vk::PipelineBindPoint::eGraphics, {}, color_reference, {}, &depth_reference);
// Subpass dependencies for layout 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 | vk::PipelineStageFlagBits::eEarlyFragmentTests | vk::PipelineStageFlagBits::eLateFragmentTests;
dependencies[0].srcAccessMask = vk::AccessFlagBits::eNoneKHR;
dependencies[0].dstAccessMask = vk::AccessFlagBits::eColorAttachmentRead | vk::AccessFlagBits::eColorAttachmentWrite | vk::AccessFlagBits::eDepthStencilAttachmentRead | vk::AccessFlagBits::eDepthStencilAttachmentWrite;
dependencies[0].dependencyFlags = vk::DependencyFlagBits::eByRegion;
dependencies[1].srcSubpass = 0;
dependencies[1].dstSubpass = VK_SUBPASS_EXTERNAL;
dependencies[1].srcStageMask = vk::PipelineStageFlagBits::eColorAttachmentOutput | vk::PipelineStageFlagBits::eEarlyFragmentTests | vk::PipelineStageFlagBits::eLateFragmentTests;
dependencies[1].dstStageMask = vk::PipelineStageFlagBits::eBottomOfPipe;
dependencies[1].srcAccessMask = vk::AccessFlagBits::eColorAttachmentRead | vk::AccessFlagBits::eColorAttachmentWrite | vk::AccessFlagBits::eDepthStencilAttachmentRead | vk::AccessFlagBits::eDepthStencilAttachmentWrite;
dependencies[1].dstAccessMask = vk::AccessFlagBits::eMemoryRead;
dependencies[1].dependencyFlags = vk::DependencyFlagBits::eByRegion;
vk::RenderPassCreateInfo render_pass_create_info({}, attachments, subpass_description, dependencies);
render_pass = get_device().get_handle().createRenderPass(render_pass_create_info);
}
void HPPApiVulkanSample::update_render_pass_flags(RenderPassCreateFlags flags)
{
get_device().get_handle().destroyRenderPass(render_pass);
vk::AttachmentLoadOp color_attachment_load_op = vk::AttachmentLoadOp::eClear;
vk::ImageLayout color_attachment_image_layout = vk::ImageLayout::eUndefined;
// Samples can keep the color attachment contents, e.g. if they have previously written to the swap chain images
if (flags & RenderPassCreateFlags::ColorAttachmentLoad)
{
color_attachment_load_op = vk::AttachmentLoadOp::eLoad;
color_attachment_image_layout = vk::ImageLayout::ePresentSrcKHR;
}
std::array<vk::AttachmentDescription, 2> attachments = {};
// Color attachment
attachments[0].format = get_render_context().get_format();
attachments[0].samples = vk::SampleCountFlagBits::e1;
attachments[0].loadOp = color_attachment_load_op;
attachments[0].storeOp = vk::AttachmentStoreOp::eStore;
attachments[0].stencilLoadOp = vk::AttachmentLoadOp::eDontCare;
attachments[0].stencilStoreOp = vk::AttachmentStoreOp::eDontCare;
attachments[0].initialLayout = color_attachment_image_layout;
attachments[0].finalLayout = vk::ImageLayout::ePresentSrcKHR;
// Depth attachment
attachments[1].format = depth_format;
attachments[1].samples = vk::SampleCountFlagBits::e1;
attachments[1].loadOp = vk::AttachmentLoadOp::eClear;
attachments[1].storeOp = vk::AttachmentStoreOp::eDontCare;
attachments[1].stencilLoadOp = vk::AttachmentLoadOp::eClear;
attachments[1].stencilStoreOp = vk::AttachmentStoreOp::eDontCare;
attachments[1].initialLayout = vk::ImageLayout::eUndefined;
attachments[1].finalLayout = vk::ImageLayout::eDepthStencilAttachmentOptimal;
vk::AttachmentReference color_reference(0, vk::ImageLayout::eColorAttachmentOptimal);
vk::AttachmentReference depth_reference(1, vk::ImageLayout::eDepthStencilAttachmentOptimal);
vk::SubpassDescription subpass_description({}, vk::PipelineBindPoint::eGraphics, {}, color_reference, {}, &depth_reference);
// Subpass dependencies for layout 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 | vk::PipelineStageFlagBits::eEarlyFragmentTests | vk::PipelineStageFlagBits::eLateFragmentTests;
dependencies[0].srcAccessMask = vk::AccessFlagBits::eNoneKHR;
dependencies[0].dstAccessMask = vk::AccessFlagBits::eColorAttachmentRead | vk::AccessFlagBits::eColorAttachmentWrite | vk::AccessFlagBits::eDepthStencilAttachmentRead | vk::AccessFlagBits::eDepthStencilAttachmentWrite;
dependencies[0].dependencyFlags = vk::DependencyFlagBits::eByRegion;
dependencies[1].srcSubpass = 0;
dependencies[1].dstSubpass = VK_SUBPASS_EXTERNAL;
dependencies[1].srcStageMask = vk::PipelineStageFlagBits::eColorAttachmentOutput | vk::PipelineStageFlagBits::eEarlyFragmentTests | vk::PipelineStageFlagBits::eLateFragmentTests;
dependencies[1].dstStageMask = vk::PipelineStageFlagBits::eBottomOfPipe;
dependencies[1].srcAccessMask = vk::AccessFlagBits::eColorAttachmentRead | vk::AccessFlagBits::eColorAttachmentWrite | vk::AccessFlagBits::eDepthStencilAttachmentRead | vk::AccessFlagBits::eDepthStencilAttachmentWrite;
dependencies[1].dstAccessMask = vk::AccessFlagBits::eMemoryRead;
dependencies[1].dependencyFlags = vk::DependencyFlagBits::eByRegion;
vk::RenderPassCreateInfo render_pass_create_info({}, attachments, subpass_description, dependencies);
render_pass = get_device().get_handle().createRenderPass(render_pass_create_info);
}
void HPPApiVulkanSample::on_update_ui_overlay(vkb::Drawer &drawer)
{}
vk::Sampler HPPApiVulkanSample::create_default_sampler(vk::SamplerAddressMode address_mode, size_t mipmaps_count, vk::Format format)
{
return vkb::common::create_sampler(
get_device().get_gpu().get_handle(),
get_device().get_handle(),
format,
vk::Filter::eLinear,
address_mode,
get_device().get_gpu().get_features().samplerAnisotropy ? (get_device().get_gpu().get_properties().limits.maxSamplerAnisotropy) : 1.0f,
static_cast<float>(mipmaps_count));
}
void HPPApiVulkanSample::create_swapchain_buffers()
{
if (get_render_context().has_swapchain())
{
auto &images = get_render_context().get_swapchain().get_images();
// Get the swap chain buffers containing the image and imageview
for (auto &swapchain_buffer : swapchain_buffers)
{
get_device().get_handle().destroyImageView(swapchain_buffer.view);
}
swapchain_buffers.clear();
swapchain_buffers.reserve(images.size());
for (auto &image : images)
{
swapchain_buffers.push_back(
{image,
vkb::common::create_image_view(get_device().get_handle(), image, vk::ImageViewType::e2D, get_render_context().get_swapchain().get_format())});
}
}
else
{
auto &frames = get_render_context().get_render_frames();
// Get the swap chain buffers containing the image and imageview
swapchain_buffers.clear();
swapchain_buffers.reserve(frames.size());
for (auto &frame : frames)
{
auto &image_view = *frame->get_render_target().get_views().begin();
swapchain_buffers.push_back({image_view.get_image().get_handle(), image_view.get_handle()});
}
}
}
void HPPApiVulkanSample::update_swapchain_image_usage_flags(std::set<vk::ImageUsageFlagBits> const &image_usage_flags)
{
get_render_context().update_swapchain(image_usage_flags);
create_swapchain_buffers();
setup_framebuffer();
}
void HPPApiVulkanSample::handle_surface_changes()
{
vk::SurfaceCapabilitiesKHR surface_properties =
get_device().get_gpu().get_handle().getSurfaceCapabilitiesKHR(get_render_context().get_swapchain().get_surface());
if (surface_properties.currentExtent != get_render_context().get_surface_extent())
{
resize(surface_properties.currentExtent.width, surface_properties.currentExtent.height);
}
}
vk::ImageLayout HPPApiVulkanSample::descriptor_type_to_image_layout(vk::DescriptorType descriptor_type, vk::Format format) const
{
switch (descriptor_type)
{
case vk::DescriptorType::eCombinedImageSampler:
case vk::DescriptorType::eInputAttachment:
return vkb::common::is_depth_format(format) ? vk::ImageLayout::eDepthStencilReadOnlyOptimal : vk::ImageLayout::eShaderReadOnlyOptimal;
case vk::DescriptorType::eStorageImage:
return vk::ImageLayout::eGeneral;
default:
return vk::ImageLayout::eUndefined;
}
}
HPPTexture HPPApiVulkanSample::load_texture(const std::string &file, vkb::scene_graph::components::HPPImage::ContentType content_type, vk::SamplerAddressMode address_mode)
{
HPPTexture texture;
texture.image = vkb::scene_graph::components::HPPImage::load(file, file, content_type);
texture.image->create_vk_image(get_device());
const auto &queue = get_device().get_queue_by_flags(vk::QueueFlagBits::eGraphics, 0);
vk::CommandBuffer command_buffer = get_device().create_command_buffer(vk::CommandBufferLevel::ePrimary, true);
vkb::core::HPPBuffer stage_buffer = vkb::core::HPPBuffer::create_staging_buffer(get_device(), texture.image->get_data());
// Setup buffer copy regions for each mip level
std::vector<vk::BufferImageCopy> bufferCopyRegions;
auto &mipmaps = texture.image->get_mipmaps();
for (size_t i = 0; i < mipmaps.size(); i++)
{
vk::BufferImageCopy buffer_copy_region;
buffer_copy_region.imageSubresource.aspectMask = vk::ImageAspectFlagBits::eColor;
buffer_copy_region.imageSubresource.mipLevel = vkb::to_u32(i);
buffer_copy_region.imageSubresource.baseArrayLayer = 0;
buffer_copy_region.imageSubresource.layerCount = 1;
buffer_copy_region.imageExtent.width = texture.image->get_extent().width >> i;
buffer_copy_region.imageExtent.height = texture.image->get_extent().height >> i;
buffer_copy_region.imageExtent.depth = 1;
buffer_copy_region.bufferOffset = mipmaps[i].offset;
bufferCopyRegions.push_back(buffer_copy_region);
}
vk::ImageSubresourceRange subresource_range(vk::ImageAspectFlagBits::eColor, 0, vkb::to_u32(mipmaps.size()), 0, 1);
// Image barrier for optimal image (target)
// Optimal image will be used as destination for the copy
vkb::common::image_layout_transition(
command_buffer, texture.image->get_vk_image().get_handle(), vk::ImageLayout::eUndefined, vk::ImageLayout::eTransferDstOptimal, subresource_range);
// Copy mip levels from staging buffer
command_buffer.copyBufferToImage(
stage_buffer.get_handle(), texture.image->get_vk_image().get_handle(), vk::ImageLayout::eTransferDstOptimal, bufferCopyRegions);
// Change texture image layout to shader read after all mip levels have been copied
vkb::common::image_layout_transition(command_buffer,
texture.image->get_vk_image().get_handle(),
vk::ImageLayout::eTransferDstOptimal,
vk::ImageLayout::eShaderReadOnlyOptimal,
subresource_range);
get_device().flush_command_buffer(command_buffer, queue.get_handle());
texture.sampler = create_default_sampler(address_mode, mipmaps.size(), texture.image->get_format());
return texture;
}
HPPTexture HPPApiVulkanSample::load_texture_array(const std::string &file, vkb::scene_graph::components::HPPImage::ContentType content_type, vk::SamplerAddressMode address_mode)
{
HPPTexture texture{};
texture.image = vkb::scene_graph::components::HPPImage::load(file, file, content_type);
texture.image->create_vk_image(get_device(), vk::ImageViewType::e2DArray);
const auto &queue = get_device().get_queue_by_flags(vk::QueueFlagBits::eGraphics, 0);
vk::CommandBuffer command_buffer = get_device().create_command_buffer(vk::CommandBufferLevel::ePrimary, true);
vkb::core::HPPBuffer stage_buffer = vkb::core::HPPBuffer::create_staging_buffer(get_device(), texture.image->get_data());
// Setup buffer copy regions for each mip level
std::vector<vk::BufferImageCopy> buffer_copy_regions;
auto &mipmaps = texture.image->get_mipmaps();
const auto &layers = texture.image->get_layers();
auto &offsets = texture.image->get_offsets();
for (uint32_t layer = 0; layer < layers; layer++)
{
for (size_t i = 0; i < mipmaps.size(); i++)
{
vk::BufferImageCopy buffer_copy_region;
buffer_copy_region.imageSubresource.aspectMask = vk::ImageAspectFlagBits::eColor;
buffer_copy_region.imageSubresource.mipLevel = vkb::to_u32(i);
buffer_copy_region.imageSubresource.baseArrayLayer = layer;
buffer_copy_region.imageSubresource.layerCount = 1;
buffer_copy_region.imageExtent.width = texture.image->get_extent().width >> i;
buffer_copy_region.imageExtent.height = texture.image->get_extent().height >> i;
buffer_copy_region.imageExtent.depth = 1;
buffer_copy_region.bufferOffset = offsets[layer][i];
buffer_copy_regions.push_back(buffer_copy_region);
}
}
vk::ImageSubresourceRange subresource_range(vk::ImageAspectFlagBits::eColor, 0, vkb::to_u32(mipmaps.size()), 0, layers);
// Image barrier for optimal image (target)
// Optimal image will be used as destination for the copy
vkb::common::image_layout_transition(
command_buffer, texture.image->get_vk_image().get_handle(), vk::ImageLayout::eUndefined, vk::ImageLayout::eTransferDstOptimal, subresource_range);
// Copy mip levels from staging buffer
command_buffer.copyBufferToImage(
stage_buffer.get_handle(), texture.image->get_vk_image().get_handle(), vk::ImageLayout::eTransferDstOptimal, buffer_copy_regions);
// Change texture image layout to shader read after all mip levels have been copied
vkb::common::image_layout_transition(command_buffer,
texture.image->get_vk_image().get_handle(),
vk::ImageLayout::eTransferDstOptimal,
vk::ImageLayout::eShaderReadOnlyOptimal,
subresource_range);
get_device().flush_command_buffer(command_buffer, queue.get_handle());
texture.sampler = create_default_sampler(address_mode, mipmaps.size(), texture.image->get_format());
return texture;
}
HPPTexture HPPApiVulkanSample::load_texture_cubemap(const std::string &file, vkb::scene_graph::components::HPPImage::ContentType content_type)
{
HPPTexture texture{};
texture.image = vkb::scene_graph::components::HPPImage::load(file, file, content_type);
texture.image->create_vk_image(get_device(), vk::ImageViewType::eCube, vk::ImageCreateFlagBits::eCubeCompatible);
const auto &queue = get_device().get_queue_by_flags(vk::QueueFlagBits::eGraphics, 0);
vk::CommandBuffer command_buffer = get_device().create_command_buffer(vk::CommandBufferLevel::ePrimary, true);
vkb::core::HPPBuffer stage_buffer = vkb::core::HPPBuffer::create_staging_buffer(get_device(), texture.image->get_data());