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api_vulkan_sample.cpp
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/* Copyright (c) 2019-2024, Sascha Willems
*
* 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 "api_vulkan_sample.h"
#include "core/device.h"
#include "core/swapchain.h"
#include "gltf_loader.h"
#include "scene_graph/components/image.h"
#include "scene_graph/components/sampler.h"
#include "scene_graph/components/sub_mesh.h"
#include "scene_graph/components/texture.h"
bool ApiVulkanSample::prepare(const vkb::ApplicationOptions &options)
{
if (!VulkanSample::prepare(options))
{
return false;
}
depth_format = vkb::get_suitable_depth_format(get_device().get_gpu().get_handle());
// Create synchronization objects
VkSemaphoreCreateInfo semaphore_create_info = vkb::initializers::semaphore_create_info();
// 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
VK_CHECK(vkCreateSemaphore(get_device().get_handle(), &semaphore_create_info, nullptr, &semaphores.acquired_image_ready));
// Create a semaphore used to synchronize command submission
// Ensures that the image is not presented until all commands have been sumbitted and executed
VK_CHECK(vkCreateSemaphore(get_device().get_handle(), &semaphore_create_info, nullptr, &semaphores.render_complete));
// Set up submit info structure
// Semaphores will stay the same during application lifetime
// Command buffer submission info is set by each example
submit_info = vkb::initializers::submit_info();
submit_info.pWaitDstStageMask = &submit_pipeline_stages;
if (window->get_window_mode() != vkb::Window::Mode::Headless)
{
submit_info.waitSemaphoreCount = 1;
submit_info.pWaitSemaphores = &semaphores.acquired_image_ready;
submit_info.signalSemaphoreCount = 1;
submit_info.pSignalSemaphores = &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();
width = get_render_context().get_surface_extent().width;
height = get_render_context().get_surface_extent().height;
prepare_gui();
return true;
}
void ApiVulkanSample::prepare_gui()
{
create_gui(*window, nullptr, 15.0f, true);
get_gui().prepare(pipeline_cache, render_pass,
{load_shader("uioverlay/uioverlay.vert", VK_SHADER_STAGE_VERTEX_BIT),
load_shader("uioverlay/uioverlay.frag", VK_SHADER_STAGE_FRAGMENT_BIT)});
}
void ApiVulkanSample::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 ApiVulkanSample::resize(const uint32_t _width, const uint32_t _height)
{
if (!prepared)
{
return false;
}
get_render_context().handle_surface_changes();
// Don't recreate the swapchain if the dimensions haven't changed
if (width == get_render_context().get_surface_extent().width && height == get_render_context().get_surface_extent().height)
{
return false;
}
width = get_render_context().get_surface_extent().width;
height = get_render_context().get_surface_extent().height;
prepared = false;
// Ensure all operations on the device have been finished before destroying resources
get_device().wait_idle();
create_swapchain_buffers();
// Recreate the frame buffers
vkDestroyImageView(get_device().get_handle(), depth_stencil.view, nullptr);
vkDestroyImage(get_device().get_handle(), depth_stencil.image, nullptr);
vkFreeMemory(get_device().get_handle(), depth_stencil.mem, nullptr);
setup_depth_stencil();
for (uint32_t i = 0; i < framebuffers.size(); i++)
{
vkDestroyFramebuffer(get_device().get_handle(), framebuffers[i], nullptr);
framebuffers[i] = VK_NULL_HANDLE;
}
setup_framebuffer();
if ((width > 0.0f) && (height > 0.0f))
{
if (has_gui())
{
get_gui().resize(width, height);
}
}
rebuild_command_buffers();
get_device().wait_idle();
if ((width > 0.0f) && (height > 0.0f))
{
camera.update_aspect_ratio(static_cast<float>(width) / static_cast<float>(height));
}
// Notify derived class
view_changed();
prepared = true;
return true;
}
void ApiVulkanSample::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<VkSurfaceFormatKHR>{{VK_FORMAT_B8G8R8A8_SRGB, VK_COLOR_SPACE_SRGB_NONLINEAR_KHR},
{VK_FORMAT_R8G8B8A8_SRGB, VK_COLOR_SPACE_SRGB_NONLINEAR_KHR}};
VulkanSample::create_render_context(surface_priority_list);
}
void ApiVulkanSample::input_event(const vkb::InputEvent &input_event)
{
VulkanSample::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 ApiVulkanSample::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 ApiVulkanSample::mouse_moved(double x, double y, bool &handled)
{}
bool ApiVulkanSample::check_command_buffers()
{
for (auto &command_buffer : draw_cmd_buffers)
{
if (command_buffer == VK_NULL_HANDLE)
{
return false;
}
}
return true;
}
void ApiVulkanSample::create_command_buffers()
{
// Create one command buffer for each swap chain image and reuse for rendering
draw_cmd_buffers.resize(get_render_context().get_render_frames().size());
VkCommandBufferAllocateInfo allocate_info =
vkb::initializers::command_buffer_allocate_info(
cmd_pool,
VK_COMMAND_BUFFER_LEVEL_PRIMARY,
static_cast<uint32_t>(draw_cmd_buffers.size()));
VK_CHECK(vkAllocateCommandBuffers(get_device().get_handle(), &allocate_info, draw_cmd_buffers.data()));
}
void ApiVulkanSample::destroy_command_buffers()
{
vkFreeCommandBuffers(get_device().get_handle(), cmd_pool, static_cast<uint32_t>(draw_cmd_buffers.size()), draw_cmd_buffers.data());
}
void ApiVulkanSample::recreate_current_command_buffer()
{
auto &cmd = draw_cmd_buffers[current_buffer];
assert(cmd);
vkFreeCommandBuffers(get_device().get_handle(), cmd_pool, 1, &cmd);
VkCommandBufferAllocateInfo command_buffer_allocate_info{VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO, nullptr, cmd_pool, VK_COMMAND_BUFFER_LEVEL_PRIMARY, 1};
VK_CHECK(vkAllocateCommandBuffers(get_device().get_handle(), &command_buffer_allocate_info, &cmd));
}
void ApiVulkanSample::create_pipeline_cache()
{
VkPipelineCacheCreateInfo pipeline_cache_create_info = {};
pipeline_cache_create_info.sType = VK_STRUCTURE_TYPE_PIPELINE_CACHE_CREATE_INFO;
VK_CHECK(vkCreatePipelineCache(get_device().get_handle(), &pipeline_cache_create_info, nullptr, &pipeline_cache));
}
VkPipelineShaderStageCreateInfo ApiVulkanSample::load_shader(const std::string &file, VkShaderStageFlagBits stage, vkb::ShaderSourceLanguage src_language)
{
VkPipelineShaderStageCreateInfo shader_stage = {};
shader_stage.sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
shader_stage.stage = stage;
shader_stage.module = vkb::load_shader(file.c_str(), get_device().get_handle(), stage, src_language);
shader_stage.pName = "main";
assert(shader_stage.module != VK_NULL_HANDLE);
shader_modules.push_back(shader_stage.module);
return shader_stage;
}
VkPipelineShaderStageCreateInfo ApiVulkanSample::load_shader(const std::string &sample_folder_name, const std::string &shader_filename, VkShaderStageFlagBits 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;
VkPipelineShaderStageCreateInfo shader_stage = {};
shader_stage.sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
shader_stage.stage = stage;
shader_stage.module = vkb::load_shader(full_file_name, get_device().get_handle(), stage, src_language);
shader_stage.pName = "main";
assert(shader_stage.module != VK_NULL_HANDLE);
shader_modules.push_back(shader_stage.module);
return shader_stage;
}
void ApiVulkanSample::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());
additional_ui();
});
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 ApiVulkanSample::draw_ui(const VkCommandBuffer command_buffer)
{
if (has_gui())
{
const VkViewport viewport = vkb::initializers::viewport(static_cast<float>(width), static_cast<float>(height), 0.0f, 1.0f);
const VkRect2D scissor = vkb::initializers::rect2D(width, height, 0, 0);
vkCmdSetViewport(command_buffer, 0, 1, &viewport);
vkCmdSetScissor(command_buffer, 0, 1, &scissor);
get_gui().draw(command_buffer);
}
}
void ApiVulkanSample::prepare_frame()
{
if (get_render_context().has_swapchain())
{
handle_surface_changes();
// Acquire the next image from the swap chain
VkResult result = get_render_context().get_swapchain().acquire_next_image(current_buffer, semaphores.acquired_image_ready, VK_NULL_HANDLE);
// Recreate the swapchain if it's no longer compatible with the surface (OUT_OF_DATE)
if (result == VK_ERROR_OUT_OF_DATE_KHR)
{
resize(width, height);
}
// VK_SUBOPTIMAL_KHR 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
else if (result != VK_SUBOPTIMAL_KHR)
{
VK_CHECK(result);
}
}
}
void ApiVulkanSample::submit_frame()
{
if (get_render_context().has_swapchain())
{
const auto &queue = get_device().get_queue_by_present(0);
VkSwapchainKHR sc = get_render_context().get_swapchain().get_handle();
VkPresentInfoKHR present_info = {};
present_info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
present_info.pNext = NULL;
present_info.swapchainCount = 1;
present_info.pSwapchains = ≻
present_info.pImageIndices = ¤t_buffer;
VkDisplayPresentInfoKHR disp_present_info{};
if (get_device().is_extension_supported(VK_KHR_DISPLAY_SWAPCHAIN_EXTENSION_NAME) &&
window->get_display_present_info(&disp_present_info, width, height))
{
// Add display present info if supported and wanted
present_info.pNext = &disp_present_info;
}
// Check if a wait semaphore has been specified to wait for before presenting the image
if (semaphores.render_complete != VK_NULL_HANDLE)
{
present_info.pWaitSemaphores = &semaphores.render_complete;
present_info.waitSemaphoreCount = 1;
}
VkResult present_result = queue.present(present_info);
if (!((present_result == VK_SUCCESS) || (present_result == VK_SUBOPTIMAL_KHR)))
{
if (present_result == VK_ERROR_OUT_OF_DATE_KHR)
{
// Swap chain is no longer compatible with the surface and needs to be recreated
resize(width, height);
return;
}
else
{
VK_CHECK(present_result);
}
}
}
// 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).
VK_CHECK(get_device().get_queue_by_present(0).wait_idle());
}
ApiVulkanSample::~ApiVulkanSample()
{
if (has_device())
{
get_device().wait_idle();
// Clean up Vulkan resources
if (descriptor_pool != VK_NULL_HANDLE)
{
vkDestroyDescriptorPool(get_device().get_handle(), descriptor_pool, nullptr);
}
destroy_command_buffers();
vkDestroyRenderPass(get_device().get_handle(), render_pass, nullptr);
for (uint32_t i = 0; i < framebuffers.size(); i++)
{
vkDestroyFramebuffer(get_device().get_handle(), framebuffers[i], nullptr);
}
for (auto &swapchain_buffer : swapchain_buffers)
{
vkDestroyImageView(get_device().get_handle(), swapchain_buffer.view, nullptr);
}
for (auto &shader_module : shader_modules)
{
vkDestroyShaderModule(get_device().get_handle(), shader_module, nullptr);
}
vkDestroyImageView(get_device().get_handle(), depth_stencil.view, nullptr);
vkDestroyImage(get_device().get_handle(), depth_stencil.image, nullptr);
vkFreeMemory(get_device().get_handle(), depth_stencil.mem, nullptr);
vkDestroyPipelineCache(get_device().get_handle(), pipeline_cache, nullptr);
vkDestroyCommandPool(get_device().get_handle(), cmd_pool, nullptr);
vkDestroySemaphore(get_device().get_handle(), semaphores.acquired_image_ready, nullptr);
vkDestroySemaphore(get_device().get_handle(), semaphores.render_complete, nullptr);
for (auto &fence : wait_fences)
{
vkDestroyFence(get_device().get_handle(), fence, nullptr);
}
}
}
void ApiVulkanSample::view_changed()
{}
void ApiVulkanSample::build_command_buffers()
{}
void ApiVulkanSample::rebuild_command_buffers()
{
vkResetCommandPool(get_device().get_handle(), cmd_pool, 0);
build_command_buffers();
}
void ApiVulkanSample::create_synchronization_primitives()
{
// Wait fences to sync command buffer access
VkFenceCreateInfo fence_create_info = vkb::initializers::fence_create_info(VK_FENCE_CREATE_SIGNALED_BIT);
wait_fences.resize(draw_cmd_buffers.size());
for (auto &fence : wait_fences)
{
VK_CHECK(vkCreateFence(get_device().get_handle(), &fence_create_info, nullptr, &fence));
}
}
void ApiVulkanSample::create_command_pool()
{
VkCommandPoolCreateInfo command_pool_info = {};
command_pool_info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
command_pool_info.queueFamilyIndex = get_device().get_queue_by_flags(VK_QUEUE_GRAPHICS_BIT | VK_QUEUE_COMPUTE_BIT, 0).get_family_index();
VK_CHECK(vkCreateCommandPool(get_device().get_handle(), &command_pool_info, nullptr, &cmd_pool));
}
void ApiVulkanSample::setup_depth_stencil()
{
VkImageCreateInfo image_create_info{};
image_create_info.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
image_create_info.imageType = VK_IMAGE_TYPE_2D;
image_create_info.format = depth_format;
image_create_info.extent = {get_render_context().get_surface_extent().width, get_render_context().get_surface_extent().height, 1};
image_create_info.mipLevels = 1;
image_create_info.arrayLayers = 1;
image_create_info.samples = VK_SAMPLE_COUNT_1_BIT;
image_create_info.tiling = VK_IMAGE_TILING_OPTIMAL;
image_create_info.usage = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
VK_CHECK(vkCreateImage(get_device().get_handle(), &image_create_info, nullptr, &depth_stencil.image));
VkMemoryRequirements memReqs{};
vkGetImageMemoryRequirements(get_device().get_handle(), depth_stencil.image, &memReqs);
VkMemoryAllocateInfo memory_allocation{};
memory_allocation.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
memory_allocation.allocationSize = memReqs.size;
memory_allocation.memoryTypeIndex = get_device().get_memory_type(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
VK_CHECK(vkAllocateMemory(get_device().get_handle(), &memory_allocation, nullptr, &depth_stencil.mem));
VK_CHECK(vkBindImageMemory(get_device().get_handle(), depth_stencil.image, depth_stencil.mem, 0));
VkImageViewCreateInfo image_view_create_info{};
image_view_create_info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
image_view_create_info.viewType = VK_IMAGE_VIEW_TYPE_2D;
image_view_create_info.image = depth_stencil.image;
image_view_create_info.format = depth_format;
image_view_create_info.subresourceRange.baseMipLevel = 0;
image_view_create_info.subresourceRange.levelCount = 1;
image_view_create_info.subresourceRange.baseArrayLayer = 0;
image_view_create_info.subresourceRange.layerCount = 1;
image_view_create_info.subresourceRange.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT;
// Stencil aspect should only be set on depth + stencil formats (VK_FORMAT_D16_UNORM_S8_UINT..VK_FORMAT_D32_SFLOAT_S8_UINT
if (depth_format >= VK_FORMAT_D16_UNORM_S8_UINT)
{
image_view_create_info.subresourceRange.aspectMask |= VK_IMAGE_ASPECT_STENCIL_BIT;
}
VK_CHECK(vkCreateImageView(get_device().get_handle(), &image_view_create_info, nullptr, &depth_stencil.view));
}
void ApiVulkanSample::setup_framebuffer()
{
VkImageView attachments[2];
// Depth/Stencil attachment is the same for all frame buffers
attachments[1] = depth_stencil.view;
VkFramebufferCreateInfo framebuffer_create_info = {};
framebuffer_create_info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
framebuffer_create_info.pNext = NULL;
framebuffer_create_info.renderPass = render_pass;
framebuffer_create_info.attachmentCount = 2;
framebuffer_create_info.pAttachments = attachments;
framebuffer_create_info.width = get_render_context().get_surface_extent().width;
framebuffer_create_info.height = get_render_context().get_surface_extent().height;
framebuffer_create_info.layers = 1;
// Delete existing frame buffers
if (framebuffers.size() > 0)
{
for (uint32_t i = 0; i < framebuffers.size(); i++)
{
if (framebuffers[i] != VK_NULL_HANDLE)
{
vkDestroyFramebuffer(get_device().get_handle(), framebuffers[i], nullptr);
}
}
}
// Create frame buffers for every swap chain image
framebuffers.resize(get_render_context().get_render_frames().size());
for (uint32_t i = 0; i < framebuffers.size(); i++)
{
attachments[0] = swapchain_buffers[i].view;
VK_CHECK(vkCreateFramebuffer(get_device().get_handle(), &framebuffer_create_info, nullptr, &framebuffers[i]));
}
}
void ApiVulkanSample::setup_render_pass()
{
std::array<VkAttachmentDescription, 2> attachments = {};
// Color attachment
attachments[0].format = get_render_context().get_format();
attachments[0].samples = VK_SAMPLE_COUNT_1_BIT;
attachments[0].loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attachments[0].storeOp = VK_ATTACHMENT_STORE_OP_STORE;
attachments[0].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
attachments[0].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
attachments[0].initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
attachments[0].finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
// Depth attachment
attachments[1].format = depth_format;
attachments[1].samples = VK_SAMPLE_COUNT_1_BIT;
attachments[1].loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attachments[1].storeOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
attachments[1].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attachments[1].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
attachments[1].initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
attachments[1].finalLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
VkAttachmentReference color_reference = {};
color_reference.attachment = 0;
color_reference.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
VkAttachmentReference depth_reference = {};
depth_reference.attachment = 1;
depth_reference.layout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
VkSubpassDescription subpass_description = {};
subpass_description.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
subpass_description.colorAttachmentCount = 1;
subpass_description.pColorAttachments = &color_reference;
subpass_description.pDepthStencilAttachment = &depth_reference;
subpass_description.inputAttachmentCount = 0;
subpass_description.pInputAttachments = nullptr;
subpass_description.preserveAttachmentCount = 0;
subpass_description.pPreserveAttachments = nullptr;
subpass_description.pResolveAttachments = nullptr;
// Subpass dependencies for layout transitions
std::array<VkSubpassDependency, 2> dependencies;
dependencies[0].srcSubpass = VK_SUBPASS_EXTERNAL;
dependencies[0].dstSubpass = 0;
dependencies[0].srcStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
dependencies[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT | VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT | VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT;
dependencies[0].srcAccessMask = VK_ACCESS_NONE_KHR;
dependencies[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT | VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_READ_BIT | VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
dependencies[0].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
dependencies[1].srcSubpass = 0;
dependencies[1].dstSubpass = VK_SUBPASS_EXTERNAL;
dependencies[1].srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT | VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT | VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT;
dependencies[1].dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
dependencies[1].srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT | VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_READ_BIT | VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
dependencies[1].dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
dependencies[1].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
VkRenderPassCreateInfo render_pass_create_info = {};
render_pass_create_info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
render_pass_create_info.attachmentCount = static_cast<uint32_t>(attachments.size());
render_pass_create_info.pAttachments = attachments.data();
render_pass_create_info.subpassCount = 1;
render_pass_create_info.pSubpasses = &subpass_description;
render_pass_create_info.dependencyCount = static_cast<uint32_t>(dependencies.size());
render_pass_create_info.pDependencies = dependencies.data();
VK_CHECK(vkCreateRenderPass(get_device().get_handle(), &render_pass_create_info, nullptr, &render_pass));
}
void ApiVulkanSample::update_render_pass_flags(uint32_t flags)
{
vkDestroyRenderPass(get_device().get_handle(), render_pass, nullptr);
VkAttachmentLoadOp color_attachment_load_op = VK_ATTACHMENT_LOAD_OP_CLEAR;
VkAttachmentStoreOp color_attachment_store_op = VK_ATTACHMENT_STORE_OP_STORE;
VkImageLayout color_attachment_image_layout = VK_IMAGE_LAYOUT_UNDEFINED;
// 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_ATTACHMENT_LOAD_OP_LOAD;
color_attachment_image_layout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
}
std::array<VkAttachmentDescription, 2> attachments = {};
// Color attachment
attachments[0].format = get_render_context().get_format();
attachments[0].samples = VK_SAMPLE_COUNT_1_BIT;
attachments[0].loadOp = color_attachment_load_op;
attachments[0].storeOp = color_attachment_store_op;
attachments[0].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
attachments[0].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
attachments[0].initialLayout = color_attachment_image_layout;
attachments[0].finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
// Depth attachment
attachments[1].format = depth_format;
attachments[1].samples = VK_SAMPLE_COUNT_1_BIT;
attachments[1].loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attachments[1].storeOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
attachments[1].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attachments[1].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
attachments[1].initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
attachments[1].finalLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
VkAttachmentReference color_reference = {};
color_reference.attachment = 0;
color_reference.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
VkAttachmentReference depth_reference = {};
depth_reference.attachment = 1;
depth_reference.layout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
VkSubpassDescription subpass_description = {};
subpass_description.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
subpass_description.colorAttachmentCount = 1;
subpass_description.pColorAttachments = &color_reference;
subpass_description.pDepthStencilAttachment = &depth_reference;
subpass_description.inputAttachmentCount = 0;
subpass_description.pInputAttachments = nullptr;
subpass_description.preserveAttachmentCount = 0;
subpass_description.pPreserveAttachments = nullptr;
subpass_description.pResolveAttachments = nullptr;
// Subpass dependencies for layout transitions
std::array<VkSubpassDependency, 2> dependencies;
dependencies[0].srcSubpass = VK_SUBPASS_EXTERNAL;
dependencies[0].dstSubpass = 0;
dependencies[0].srcStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
dependencies[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT | VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT | VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT;
dependencies[0].srcAccessMask = VK_ACCESS_NONE_KHR;
dependencies[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT | VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_READ_BIT | VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
dependencies[0].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
dependencies[1].srcSubpass = 0;
dependencies[1].dstSubpass = VK_SUBPASS_EXTERNAL;
dependencies[1].srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT | VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT | VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT;
dependencies[1].dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
dependencies[1].srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT | VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_READ_BIT | VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
dependencies[1].dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
dependencies[1].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
VkRenderPassCreateInfo render_pass_create_info = {};
render_pass_create_info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
render_pass_create_info.attachmentCount = static_cast<uint32_t>(attachments.size());
render_pass_create_info.pAttachments = attachments.data();
render_pass_create_info.subpassCount = 1;
render_pass_create_info.pSubpasses = &subpass_description;
render_pass_create_info.dependencyCount = static_cast<uint32_t>(dependencies.size());
render_pass_create_info.pDependencies = dependencies.data();
VK_CHECK(vkCreateRenderPass(get_device().get_handle(), &render_pass_create_info, nullptr, &render_pass));
}
void ApiVulkanSample::on_update_ui_overlay(vkb::Drawer &drawer)
{}
void ApiVulkanSample::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)
{
vkDestroyImageView(get_device().get_handle(), swapchain_buffer.view, nullptr);
}
swapchain_buffers.clear();
swapchain_buffers.resize(images.size());
for (uint32_t i = 0; i < images.size(); i++)
{
VkImageViewCreateInfo color_attachment_view = {};
color_attachment_view.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
color_attachment_view.pNext = NULL;
color_attachment_view.format = get_render_context().get_swapchain().get_format();
color_attachment_view.components = {
VK_COMPONENT_SWIZZLE_R,
VK_COMPONENT_SWIZZLE_G,
VK_COMPONENT_SWIZZLE_B,
VK_COMPONENT_SWIZZLE_A};
color_attachment_view.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
color_attachment_view.subresourceRange.baseMipLevel = 0;
color_attachment_view.subresourceRange.levelCount = 1;
color_attachment_view.subresourceRange.baseArrayLayer = 0;
color_attachment_view.subresourceRange.layerCount = 1;
color_attachment_view.viewType = VK_IMAGE_VIEW_TYPE_2D;
color_attachment_view.flags = 0;
swapchain_buffers[i].image = images[i];
color_attachment_view.image = swapchain_buffers[i].image;
VK_CHECK(vkCreateImageView(get_device().get_handle(), &color_attachment_view, nullptr, &swapchain_buffers[i].view));
}
}
else
{
auto &frames = get_render_context().get_render_frames();
// Get the swap chain buffers containing the image and imageview
swapchain_buffers.clear();
swapchain_buffers.resize(frames.size());
for (uint32_t i = 0; i < frames.size(); i++)
{
auto &image_view = *frames[i]->get_render_target().get_views().begin();
swapchain_buffers[i].image = image_view.get_image().get_handle();
swapchain_buffers[i].view = image_view.get_handle();
}
}
}
void ApiVulkanSample::update_swapchain_image_usage_flags(std::set<VkImageUsageFlagBits> image_usage_flags)
{
get_render_context().update_swapchain(image_usage_flags);
create_swapchain_buffers();
setup_framebuffer();
}
void ApiVulkanSample::handle_surface_changes()
{
VkSurfaceCapabilitiesKHR surface_properties;
VK_CHECK(vkGetPhysicalDeviceSurfaceCapabilitiesKHR(get_device().get_gpu().get_handle(),
get_render_context().get_swapchain().get_surface(),
&surface_properties));
if (surface_properties.currentExtent.width != get_render_context().get_surface_extent().width ||
surface_properties.currentExtent.height != get_render_context().get_surface_extent().height)
{
resize(surface_properties.currentExtent.width, surface_properties.currentExtent.height);
}
}
VkDescriptorBufferInfo ApiVulkanSample::create_descriptor(vkb::core::Buffer &buffer, VkDeviceSize size, VkDeviceSize offset)
{
VkDescriptorBufferInfo descriptor{};
descriptor.buffer = buffer.get_handle();
descriptor.range = size;
descriptor.offset = offset;
return descriptor;
}
VkDescriptorImageInfo ApiVulkanSample::create_descriptor(Texture &texture, VkDescriptorType descriptor_type)
{
VkDescriptorImageInfo descriptor{};
descriptor.sampler = texture.sampler;
descriptor.imageView = texture.image->get_vk_image_view().get_handle();
// Add image layout info based on descriptor type
switch (descriptor_type)
{
case VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER:
case VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT:
if (vkb::is_depth_stencil_format(texture.image->get_vk_image_view().get_format()))
{
descriptor.imageLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL;
}
else