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Nathan Buck 11 months ago
commit 1d23169dcc
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2
.gitignore vendored
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/target
Cargo.lock

13
Cargo.toml
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[package]
name = "tri"
version = "0.1.0"
edition = "2021"
[dependencies]
winit = "0.20.0"
ash = "0.29.0"
num = "0.2"
cgmath = "0.17.0"
image = "0.22"
memoffset = "0.5.1"
tobj = "0.1.10"

49
build.rs
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use std::process::Command;
use std::path::Path;
use std::ffi::OsStr;
use std::fs::File;
use std::io::Write;
use std::io::prelude::*;
fn main() -> std::io::Result<()> {
println!("building shaders...");
//shaders path
let shaders = Path::new("./src/shaders");
//shader target path
let out = Command::new("mkdir")
.arg("target/shaders/")
.output();
let shader_target = Path::new("./target/shaders/");
//compile all glsl shaders
for entry in shaders.read_dir().expect("reading shader directory failed") {
if let Ok(entry) = entry {
let shader_path = entry.path();
println!("compiling shader: {:?}", shader_path);
let shader_path_string: String = "./target/shaders/".to_string() + shader_path.file_name().unwrap().to_str().unwrap() + ".spv";
let shader_file: &OsStr = OsStr::new::<str>(shader_path_string.as_str());
let out = Command::new("glslc")
.arg("-c")
.arg(shader_path)
.arg("-o")
.arg(shader_file)
.output();
}
}
//include all compiled shaders in shaders.rs file in src dir
let mut txt: String = String::new();
for entry in shader_target.read_dir().expect("reading compiled shader target directory failed") {
if let Ok(entry) = entry {
let bin_path = entry.path();
let bin_path_string = bin_path.file_name().unwrap().to_str().unwrap().to_string();
txt += &("const ".to_owned() +
&bin_path_string.replace(".spv", "").replace(".", "_").to_uppercase() +
" = include_bytes!(\"../target/shaders/" +
&bin_path_string +
"\");\n");
}
}
let mut file = File::create("./src/shaders.rs")?;
file.write_all(txt.as_bytes())?;
Ok(())
}

887
src/main.rs
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pub mod utility;
use crate::{
utility::constants::*,
utility::debug::*,
utility::share,
utility::structures::*,
};
use ash::version::DeviceV1_0;
use ash::version::InstanceV1_0;
use ash::vk;
use memoffset::offset_of;
use winit::event::{Event, VirtualKeyCode, ElementState, KeyboardInput, WindowEvent};
use winit::event_loop::{EventLoop, ControlFlow};
use std::ffi::CString;
use std::ptr;
// Constants
const WINDOW_TITLE: &'static str = "18.Vertex Buffer";
#[repr(C)]
#[derive(Clone, Debug, Copy)]
struct Vertex {
pos: [f32; 2],
color: [f32; 3],
}
impl Vertex {
fn get_binding_description() -> [vk::VertexInputBindingDescription; 1] {
[vk::VertexInputBindingDescription {
binding: 0,
stride: std::mem::size_of::<Vertex>() as u32,
input_rate: vk::VertexInputRate::VERTEX,
}]
}
fn get_attribute_descriptions() -> [vk::VertexInputAttributeDescription; 2] {
[
vk::VertexInputAttributeDescription {
binding: 0,
location: 0,
format: vk::Format::R32G32_SFLOAT,
offset: offset_of!(Vertex, pos) as u32,
},
vk::VertexInputAttributeDescription {
binding: 0,
location: 1,
format: vk::Format::R32G32B32_SFLOAT,
offset: offset_of!(Vertex, color) as u32,
},
]
}
}
const VERTICES_DATA: [Vertex; 3] = [
Vertex {
pos: [0.0, -0.5],
color: [1.0, 1.0, 1.0],
},
Vertex {
pos: [0.5, 0.5],
color: [0.0, 1.0, 0.0],
},
Vertex {
pos: [-0.5, 0.5],
color: [0.0, 0.0, 1.0],
},
];
struct VulkanApp {
window: winit::window::Window,
// vulkan stuff
_entry: ash::Entry,
instance: ash::Instance,
surface_loader: ash::extensions::khr::Surface,
surface: vk::SurfaceKHR,
debug_utils_loader: ash::extensions::ext::DebugUtils,
debug_merssager: vk::DebugUtilsMessengerEXT,
physical_device: vk::PhysicalDevice,
device: ash::Device,
queue_family: QueueFamilyIndices,
graphics_queue: vk::Queue,
present_queue: vk::Queue,
swapchain_loader: ash::extensions::khr::Swapchain,
swapchain: vk::SwapchainKHR,
swapchain_images: Vec<vk::Image>,
swapchain_format: vk::Format,
swapchain_extent: vk::Extent2D,
swapchain_imageviews: Vec<vk::ImageView>,
swapchain_framebuffers: Vec<vk::Framebuffer>,
render_pass: vk::RenderPass,
pipeline_layout: vk::PipelineLayout,
graphics_pipeline: vk::Pipeline,
vertex_buffer: vk::Buffer,
vertex_buffer_memory: vk::DeviceMemory,
command_pool: vk::CommandPool,
command_buffers: Vec<vk::CommandBuffer>,
image_available_semaphores: Vec<vk::Semaphore>,
render_finished_semaphores: Vec<vk::Semaphore>,
in_flight_fences: Vec<vk::Fence>,
current_frame: usize,
is_framebuffer_resized: bool,
}
impl VulkanApp {
pub fn new(event_loop: &winit::event_loop::EventLoop<()>) -> VulkanApp {
let window = utility::window::init_window(event_loop, WINDOW_TITLE, WINDOW_WIDTH, WINDOW_HEIGHT);
// init vulkan stuff
let entry = ash::Entry::new().unwrap();
let instance = share::create_instance(
&entry,
WINDOW_TITLE,
VALIDATION.is_enable,
&VALIDATION.required_validation_layers.to_vec(),
);
let surface_stuff =
share::create_surface(&entry, &instance, &window, WINDOW_WIDTH, WINDOW_HEIGHT);
let (debug_utils_loader, debug_merssager) =
setup_debug_utils(VALIDATION.is_enable, &entry, &instance);
let physical_device =
share::pick_physical_device(&instance, &surface_stuff, &DEVICE_EXTENSIONS);
let (device, queue_family) = share::create_logical_device(
&instance,
physical_device,
&VALIDATION,
&DEVICE_EXTENSIONS,
&surface_stuff,
);
let graphics_queue =
unsafe { device.get_device_queue(queue_family.graphics_family.unwrap(), 0) };
let present_queue =
unsafe { device.get_device_queue(queue_family.present_family.unwrap(), 0) };
let swapchain_stuff = share::create_swapchain(
&instance,
&device,
physical_device,
&window,
&surface_stuff,
&queue_family,
);
let swapchain_imageviews = share::v1::create_image_views(
&device,
swapchain_stuff.swapchain_format,
&swapchain_stuff.swapchain_images,
);
let render_pass = share::v1::create_render_pass(&device, swapchain_stuff.swapchain_format);
let (graphics_pipeline, pipeline_layout) = VulkanApp::create_graphics_pipeline(
&device,
render_pass,
swapchain_stuff.swapchain_extent,
);
let swapchain_framebuffers = share::v1::create_framebuffers(
&device,
render_pass,
&swapchain_imageviews,
swapchain_stuff.swapchain_extent,
);
let command_pool = share::v1::create_command_pool(&device, &queue_family);
let (vertex_buffer, vertex_buffer_memory) =
VulkanApp::create_vertex_buffer(&instance, &device, physical_device);
let command_buffers = VulkanApp::create_command_buffers(
&device,
command_pool,
graphics_pipeline,
&swapchain_framebuffers,
render_pass,
swapchain_stuff.swapchain_extent,
vertex_buffer,
);
let sync_ojbects = share::v1::create_sync_objects(&device, MAX_FRAMES_IN_FLIGHT);
// cleanup(); the 'drop' function will take care of it.
VulkanApp {
// winit stuff
window,
// vulkan stuff
_entry: entry,
instance,
surface: surface_stuff.surface,
surface_loader: surface_stuff.surface_loader,
debug_utils_loader,
debug_merssager,
physical_device,
device,
queue_family,
graphics_queue,
present_queue,
swapchain_loader: swapchain_stuff.swapchain_loader,
swapchain: swapchain_stuff.swapchain,
swapchain_format: swapchain_stuff.swapchain_format,
swapchain_images: swapchain_stuff.swapchain_images,
swapchain_extent: swapchain_stuff.swapchain_extent,
swapchain_imageviews,
swapchain_framebuffers,
pipeline_layout,
render_pass,
graphics_pipeline,
vertex_buffer,
vertex_buffer_memory,
command_pool,
command_buffers,
image_available_semaphores: sync_ojbects.image_available_semaphores,
render_finished_semaphores: sync_ojbects.render_finished_semaphores,
in_flight_fences: sync_ojbects.inflight_fences,
current_frame: 0,
is_framebuffer_resized: false,
}
}
fn create_vertex_buffer(
instance: &ash::Instance,
device: &ash::Device,
physical_device: vk::PhysicalDevice,
) -> (vk::Buffer, vk::DeviceMemory) {
let vertex_buffer_create_info = vk::BufferCreateInfo {
s_type: vk::StructureType::BUFFER_CREATE_INFO,
p_next: ptr::null(),
flags: vk::BufferCreateFlags::empty(),
size: std::mem::size_of_val(&VERTICES_DATA) as u64,
usage: vk::BufferUsageFlags::VERTEX_BUFFER,
sharing_mode: vk::SharingMode::EXCLUSIVE,
queue_family_index_count: 0,
p_queue_family_indices: ptr::null(),
};
let vertex_buffer = unsafe {
device
.create_buffer(&vertex_buffer_create_info, None)
.expect("Failed to create Vertex Buffer")
};
let mem_requirements = unsafe { device.get_buffer_memory_requirements(vertex_buffer) };
let mem_properties =
unsafe { instance.get_physical_device_memory_properties(physical_device) };
let required_memory_flags: vk::MemoryPropertyFlags =
vk::MemoryPropertyFlags::HOST_VISIBLE | vk::MemoryPropertyFlags::HOST_COHERENT;
let memory_type = VulkanApp::find_memory_type(
mem_requirements.memory_type_bits,
required_memory_flags,
mem_properties,
);
let allocate_info = vk::MemoryAllocateInfo {
s_type: vk::StructureType::MEMORY_ALLOCATE_INFO,
p_next: ptr::null(),
allocation_size: mem_requirements.size,
memory_type_index: memory_type,
};
let vertex_buffer_memory = unsafe {
device
.allocate_memory(&allocate_info, None)
.expect("Failed to allocate vertex buffer memory!")
};
unsafe {
device
.bind_buffer_memory(vertex_buffer, vertex_buffer_memory, 0)
.expect("Failed to bind Buffer");
let data_ptr = device
.map_memory(
vertex_buffer_memory,
0,
vertex_buffer_create_info.size,
vk::MemoryMapFlags::empty(),
)
.expect("Failed to Map Memory") as *mut Vertex;
data_ptr.copy_from_nonoverlapping(VERTICES_DATA.as_ptr(), VERTICES_DATA.len());
device.unmap_memory(vertex_buffer_memory);
}
(vertex_buffer, vertex_buffer_memory)
}
fn find_memory_type(
type_filter: u32,
required_properties: vk::MemoryPropertyFlags,
mem_properties: vk::PhysicalDeviceMemoryProperties,
) -> u32 {
for (i, memory_type) in mem_properties.memory_types.iter().enumerate() {
//if (type_filter & (1 << i)) > 0 && (memory_type.property_flags & required_properties) == required_properties {
// return i as u32
// }
// same implementation
if (type_filter & (1 << i)) > 0
&& memory_type.property_flags.contains(required_properties)
{
return i as u32;
}
}
panic!("Failed to find suitable memory type!")
}
fn create_command_buffers(
device: &ash::Device,
command_pool: vk::CommandPool,
graphics_pipeline: vk::Pipeline,
framebuffers: &Vec<vk::Framebuffer>,
render_pass: vk::RenderPass,
surface_extent: vk::Extent2D,
vertex_buffer: vk::Buffer,
) -> Vec<vk::CommandBuffer> {
let command_buffer_allocate_info = vk::CommandBufferAllocateInfo {
s_type: vk::StructureType::COMMAND_BUFFER_ALLOCATE_INFO,
p_next: ptr::null(),
command_buffer_count: framebuffers.len() as u32,
command_pool,
level: vk::CommandBufferLevel::PRIMARY,
};
let command_buffers = unsafe {
device
.allocate_command_buffers(&command_buffer_allocate_info)
.expect("Failed to allocate Command Buffers!")
};
for (i, &command_buffer) in command_buffers.iter().enumerate() {
let command_buffer_begin_info = vk::CommandBufferBeginInfo {
s_type: vk::StructureType::COMMAND_BUFFER_BEGIN_INFO,
p_next: ptr::null(),
flags: vk::CommandBufferUsageFlags::SIMULTANEOUS_USE,
p_inheritance_info: ptr::null(),
};
unsafe {
device
.begin_command_buffer(command_buffer, &command_buffer_begin_info)
.expect("Failed to begin recording Command Buffer at beginning!");
}
let clear_values = [vk::ClearValue {
color: vk::ClearColorValue {
float32: [0.0, 0.0, 0.0, 1.0],
},
}];
let render_pass_begin_info = vk::RenderPassBeginInfo {
s_type: vk::StructureType::RENDER_PASS_BEGIN_INFO,
p_next: ptr::null(),
framebuffer: framebuffers[i],
render_pass,
clear_value_count: clear_values.len() as u32,
p_clear_values: clear_values.as_ptr(),
render_area: vk::Rect2D {
offset: vk::Offset2D { x: 0, y: 0 },
extent: surface_extent,
},
};
unsafe {
device.cmd_begin_render_pass(
command_buffer,
&render_pass_begin_info,
vk::SubpassContents::INLINE,
);
device.cmd_bind_pipeline(
command_buffer,
vk::PipelineBindPoint::GRAPHICS,
graphics_pipeline,
);
let vertex_buffers = [vertex_buffer];
let offsets = [0_u64];
device.cmd_bind_vertex_buffers(command_buffer, 0, &vertex_buffers, &offsets);
device.cmd_draw(command_buffer, VERTICES_DATA.len() as u32, 1, 0, 0);
device.cmd_end_render_pass(command_buffer);
device
.end_command_buffer(command_buffer)
.expect("Failed to record Command Buffer at Ending!");
}
}
command_buffers
}
}
// Fix content -------------------------------------------------------------------------------
impl VulkanApp {
fn create_graphics_pipeline(
device: &ash::Device,
render_pass: vk::RenderPass,
swapchain_extent: vk::Extent2D,
) -> (vk::Pipeline, vk::PipelineLayout) {
let vert_shader_module = share::create_shader_module(
device,
include_bytes!("../target/shaders/tri.vert.spv").to_vec(),
);
let frag_shader_module = share::create_shader_module(
device,
include_bytes!("../target/shaders/tri.frag.spv").to_vec(),
);
let main_function_name = CString::new("main").unwrap(); // the beginning function name in shader code.
let shader_stages = [
vk::PipelineShaderStageCreateInfo {
// Vertex Shader
s_type: vk::StructureType::PIPELINE_SHADER_STAGE_CREATE_INFO,
p_next: ptr::null(),
flags: vk::PipelineShaderStageCreateFlags::empty(),
module: vert_shader_module,
p_name: main_function_name.as_ptr(),
stage: vk::ShaderStageFlags::VERTEX,
p_specialization_info: ptr::null(),
},
vk::PipelineShaderStageCreateInfo {
// Fragment Shader
s_type: vk::StructureType::PIPELINE_SHADER_STAGE_CREATE_INFO,
p_next: ptr::null(),
flags: vk::PipelineShaderStageCreateFlags::empty(),
module: frag_shader_module,
p_name: main_function_name.as_ptr(),
stage: vk::ShaderStageFlags::FRAGMENT,
p_specialization_info: ptr::null(),
},
];
let binding_description = Vertex::get_binding_description();
let attribute_description = Vertex::get_attribute_descriptions();
let vertex_input_state_create_info = vk::PipelineVertexInputStateCreateInfo {
s_type: vk::StructureType::PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
p_next: ptr::null(),
flags: vk::PipelineVertexInputStateCreateFlags::empty(),
vertex_attribute_description_count: attribute_description.len() as u32,
p_vertex_attribute_descriptions: attribute_description.as_ptr(),
vertex_binding_description_count: binding_description.len() as u32,
p_vertex_binding_descriptions: binding_description.as_ptr(),
};
let vertex_input_assembly_state_info = vk::PipelineInputAssemblyStateCreateInfo {
s_type: vk::StructureType::PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO,
flags: vk::PipelineInputAssemblyStateCreateFlags::empty(),
p_next: ptr::null(),
topology: vk::PrimitiveTopology::TRIANGLE_LIST,
primitive_restart_enable: vk::FALSE,
};
let viewports = [vk::Viewport {
x: 0.0,
y: 0.0,
width: swapchain_extent.width as f32,
height: swapchain_extent.height as f32,
min_depth: 0.0,
max_depth: 1.0,
}];
let scissors = [vk::Rect2D {
offset: vk::Offset2D { x: 0, y: 0 },
extent: swapchain_extent,
}];
let viewport_state_create_info = vk::PipelineViewportStateCreateInfo {
s_type: vk::StructureType::PIPELINE_VIEWPORT_STATE_CREATE_INFO,
p_next: ptr::null(),
flags: vk::PipelineViewportStateCreateFlags::empty(),
scissor_count: scissors.len() as u32,
p_scissors: scissors.as_ptr(),
viewport_count: viewports.len() as u32,
p_viewports: viewports.as_ptr(),
};
let rasterization_statue_create_info = vk::PipelineRasterizationStateCreateInfo {
s_type: vk::StructureType::PIPELINE_RASTERIZATION_STATE_CREATE_INFO,
p_next: ptr::null(),
flags: vk::PipelineRasterizationStateCreateFlags::empty(),
cull_mode: vk::CullModeFlags::BACK,
front_face: vk::FrontFace::CLOCKWISE,
line_width: 1.0,
polygon_mode: vk::PolygonMode::FILL,
rasterizer_discard_enable: vk::FALSE,
depth_clamp_enable: vk::FALSE,
depth_bias_clamp: 0.0,
depth_bias_constant_factor: 0.0,
depth_bias_enable: vk::FALSE,
depth_bias_slope_factor: 0.0,
};
let multisample_state_create_info = vk::PipelineMultisampleStateCreateInfo {
s_type: vk::StructureType::PIPELINE_MULTISAMPLE_STATE_CREATE_INFO,
flags: vk::PipelineMultisampleStateCreateFlags::empty(),
p_next: ptr::null(),
rasterization_samples: vk::SampleCountFlags::TYPE_1,
sample_shading_enable: vk::FALSE,
min_sample_shading: 0.0,
p_sample_mask: ptr::null(),
alpha_to_one_enable: vk::FALSE,
alpha_to_coverage_enable: vk::FALSE,
};
let stencil_state = vk::StencilOpState {
fail_op: vk::StencilOp::KEEP,
pass_op: vk::StencilOp::KEEP,
depth_fail_op: vk::StencilOp::KEEP,
compare_op: vk::CompareOp::ALWAYS,
compare_mask: 0,
write_mask: 0,
reference: 0,
};
let depth_state_create_info = vk::PipelineDepthStencilStateCreateInfo {
s_type: vk::StructureType::PIPELINE_DEPTH_STENCIL_STATE_CREATE_INFO,
p_next: ptr::null(),
flags: vk::PipelineDepthStencilStateCreateFlags::empty(),
depth_test_enable: vk::FALSE,
depth_write_enable: vk::FALSE,
depth_compare_op: vk::CompareOp::LESS_OR_EQUAL,
depth_bounds_test_enable: vk::FALSE,
stencil_test_enable: vk::FALSE,
front: stencil_state,
back: stencil_state,
max_depth_bounds: 1.0,
min_depth_bounds: 0.0,
};
let color_blend_attachment_states = [vk::PipelineColorBlendAttachmentState {
blend_enable: vk::FALSE,
color_write_mask: vk::ColorComponentFlags::all(),
src_color_blend_factor: vk::BlendFactor::ONE,
dst_color_blend_factor: vk::BlendFactor::ZERO,
color_blend_op: vk::BlendOp::ADD,
src_alpha_blend_factor: vk::BlendFactor::ONE,
dst_alpha_blend_factor: vk::BlendFactor::ZERO,
alpha_blend_op: vk::BlendOp::ADD,
}];
let color_blend_state = vk::PipelineColorBlendStateCreateInfo {
s_type: vk::StructureType::PIPELINE_COLOR_BLEND_STATE_CREATE_INFO,
p_next: ptr::null(),
flags: vk::PipelineColorBlendStateCreateFlags::empty(),
logic_op_enable: vk::FALSE,
logic_op: vk::LogicOp::COPY,
attachment_count: color_blend_attachment_states.len() as u32,
p_attachments: color_blend_attachment_states.as_ptr(),
blend_constants: [0.0, 0.0, 0.0, 0.0],
};
let pipeline_layout_create_info = vk::PipelineLayoutCreateInfo {
s_type: vk::StructureType::PIPELINE_LAYOUT_CREATE_INFO,
p_next: ptr::null(),
flags: vk::PipelineLayoutCreateFlags::empty(),
set_layout_count: 0,
p_set_layouts: ptr::null(),
push_constant_range_count: 0,
p_push_constant_ranges: ptr::null(),
};
let pipeline_layout = unsafe {
device
.create_pipeline_layout(&pipeline_layout_create_info, None)
.expect("Failed to create pipeline layout!")
};
let graphic_pipeline_create_infos = [vk::GraphicsPipelineCreateInfo {
s_type: vk::StructureType::GRAPHICS_PIPELINE_CREATE_INFO,
p_next: ptr::null(),
flags: vk::PipelineCreateFlags::empty(),
stage_count: shader_stages.len() as u32,
p_stages: shader_stages.as_ptr(),
p_vertex_input_state: &vertex_input_state_create_info,
p_input_assembly_state: &vertex_input_assembly_state_info,
p_tessellation_state: ptr::null(),
p_viewport_state: &viewport_state_create_info,
p_rasterization_state: &rasterization_statue_create_info,
p_multisample_state: &multisample_state_create_info,
p_depth_stencil_state: &depth_state_create_info,
p_color_blend_state: &color_blend_state,
p_dynamic_state: ptr::null(),
layout: pipeline_layout,
render_pass,
subpass: 0,
base_pipeline_handle: vk::Pipeline::null(),
base_pipeline_index: -1,
}];
let graphics_pipelines = unsafe {
device
.create_graphics_pipelines(
vk::PipelineCache::null(),
&graphic_pipeline_create_infos,
None,
)
.expect("Failed to create Graphics Pipeline!.")
};
unsafe {
device.destroy_shader_module(vert_shader_module, None);
device.destroy_shader_module(frag_shader_module, None);
}
(graphics_pipelines[0], pipeline_layout)
}
fn draw_frame(&mut self) {
let wait_fences = [self.in_flight_fences[self.current_frame]];
unsafe {
self.device
.wait_for_fences(&wait_fences, true, std::u64::MAX)
.expect("Failed to wait for Fence!");
}
let (image_index, _is_sub_optimal) = unsafe {
let result = self.swapchain_loader.acquire_next_image(
self.swapchain,
std::u64::MAX,
self.image_available_semaphores[self.current_frame],
vk::Fence::null(),
);
match result {
Ok(image_index) => image_index,
Err(vk_result) => match vk_result {
vk::Result::ERROR_OUT_OF_DATE_KHR => {
self.recreate_swapchain();
return;
}
_ => panic!("Failed to acquire Swap Chain Image!"),
},
}
};
let wait_semaphores = [self.image_available_semaphores[self.current_frame]];
let wait_stages = [vk::PipelineStageFlags::COLOR_ATTACHMENT_OUTPUT];
let signal_semaphores = [self.render_finished_semaphores[self.current_frame]];
let submit_infos = [vk::SubmitInfo {
s_type: vk::StructureType::SUBMIT_INFO,
p_next: ptr::null(),
wait_semaphore_count: wait_semaphores.len() as u32,
p_wait_semaphores: wait_semaphores.as_ptr(),
p_wait_dst_stage_mask: wait_stages.as_ptr(),
command_buffer_count: 1,
p_command_buffers: &self.command_buffers[image_index as usize],
signal_semaphore_count: signal_semaphores.len() as u32,
p_signal_semaphores: signal_semaphores.as_ptr(),
}];
unsafe {
self.device
.reset_fences(&wait_fences)
.expect("Failed to reset Fence!");
self.device
.queue_submit(
self.graphics_queue,
&submit_infos,
self.in_flight_fences[self.current_frame],
)
.expect("Failed to execute queue submit.");
}
let swapchains = [self.swapchain];
let present_info = vk::PresentInfoKHR {
s_type: vk::StructureType::PRESENT_INFO_KHR,
p_next: ptr::null(),
wait_semaphore_count: 1,
p_wait_semaphores: signal_semaphores.as_ptr(),
swapchain_count: 1,
p_swapchains: swapchains.as_ptr(),
p_image_indices: &image_index,
p_results: ptr::null_mut(),
};
let result = unsafe {
self.swapchain_loader
.queue_present(self.present_queue, &present_info)
};
let is_resized = match result {
Ok(_) => self.is_framebuffer_resized,
Err(vk_result) => match vk_result {
vk::Result::ERROR_OUT_OF_DATE_KHR | vk::Result::SUBOPTIMAL_KHR => true,
_ => panic!("Failed to execute queue present."),
},
};
if is_resized {
self.is_framebuffer_resized = false;
self.recreate_swapchain();
}
self.current_frame = (self.current_frame + 1) % MAX_FRAMES_IN_FLIGHT;
}
fn recreate_swapchain(&mut self) {
// parameters -------------
let surface_suff = SurfaceStuff {
surface_loader: self.surface_loader.clone(),
surface: self.surface,
screen_width: WINDOW_WIDTH,
screen_height: WINDOW_HEIGHT,
};
// ------------------------
unsafe {
self.device
.device_wait_idle()
.expect("Failed to wait device idle!")
};
self.cleanup_swapchain();
let swapchain_stuff = share::create_swapchain(
&self.instance,
&self.device,
self.physical_device,
&self.window,
&surface_suff,
&self.queue_family,
);
self.swapchain_loader = swapchain_stuff.swapchain_loader;
self.swapchain = swapchain_stuff.swapchain;
self.swapchain_images = swapchain_stuff.swapchain_images;
self.swapchain_format = swapchain_stuff.swapchain_format;
self.swapchain_extent = swapchain_stuff.swapchain_extent;
self.swapchain_imageviews = share::v1::create_image_views(
&self.device,
self.swapchain_format,
&self.swapchain_images,
);
self.render_pass = share::v1::create_render_pass(&self.device, self.swapchain_format);
let (graphics_pipeline, pipeline_layout) = VulkanApp::create_graphics_pipeline(
&self.device,
self.render_pass,
swapchain_stuff.swapchain_extent,
);
self.graphics_pipeline = graphics_pipeline;
self.pipeline_layout = pipeline_layout;
self.swapchain_framebuffers = share::v1::create_framebuffers(
&self.device,
self.render_pass,
&self.swapchain_imageviews,
self.swapchain_extent,
);
self.command_buffers = VulkanApp::create_command_buffers(
&self.device,
self.command_pool,
self.graphics_pipeline,
&self.swapchain_framebuffers,
self.render_pass,
self.swapchain_extent,
self.vertex_buffer,
);
}
fn cleanup_swapchain(&self) {
unsafe {
self.device
.free_command_buffers(self.command_pool, &self.command_buffers);
for &framebuffer in self.swapchain_framebuffers.iter() {
self.device.destroy_framebuffer(framebuffer, None);
}
self.device.destroy_pipeline(self.graphics_pipeline, None);
self.device
.destroy_pipeline_layout(self.pipeline_layout, None);
self.device.destroy_render_pass(self.render_pass, None);
for &image_view in self.swapchain_imageviews.iter() {
self.device.destroy_image_view(image_view, None);
}
self.swapchain_loader
.destroy_swapchain(self.swapchain, None);
}
}
}
impl Drop for VulkanApp {
fn drop(&mut self) {
unsafe {
for i in 0..MAX_FRAMES_IN_FLIGHT {
self.device
.destroy_semaphore(self.image_available_semaphores[i], None);
self.device
.destroy_semaphore(self.render_finished_semaphores[i], None);
self.device.destroy_fence(self.in_flight_fences[i], None);
}
self.cleanup_swapchain();
self.device.destroy_buffer(self.vertex_buffer, None);
self.device.free_memory(self.vertex_buffer_memory, None);
self.device.destroy_command_pool(self.command_pool, None);
self.device.destroy_device(None);
self.surface_loader.destroy_surface(self.surface, None);
if VALIDATION.is_enable {
self.debug_utils_loader
.destroy_debug_utils_messenger(self.debug_merssager, None);
}
self.instance.destroy_instance(None);
}
}
}
impl VulkanApp {
pub fn main_loop(mut self, event_loop: EventLoop<()>) {
let mut tick_counter = utility::fps_limiter::FPSLimiter::new();
event_loop.run(move |event, _, control_flow| {
match event {
| Event::WindowEvent { event, .. } => {
match event {
| WindowEvent::CloseRequested => {
*control_flow = ControlFlow::Exit
},
| WindowEvent::KeyboardInput { input, .. } => {
match input {
| KeyboardInput { virtual_keycode, state, .. } => {
match (virtual_keycode, state) {
| (Some(VirtualKeyCode::Escape), ElementState::Pressed) => {
*control_flow = ControlFlow::Exit
},
| _ => {},
}
},
}
},
| _ => {},
}
},
| Event::MainEventsCleared => {
self.window.request_redraw();
},
| Event::RedrawRequested(_window_id) => {
self.draw_frame();
tick_counter.tick_frame();
if IS_PAINT_FPS_COUNTER {
print!("FPS: {}\r", tick_counter.fps());
}
},
| Event::LoopDestroyed => {
unsafe {
self.device.device_wait_idle()
.expect("Failed to wait device idle!")
};
},
_ => (),
}
})
}
}
fn main() {
let event_loop = EventLoop::new();
let vulkan_app = VulkanApp::new(&event_loop);
vulkan_app.main_loop(event_loop);
}
// -------------------------------------------------------------------------------------------

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src/shaders.rs
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const TRI_FRAG = include_bytes!("../target/shaders/tri.frag.spv");
const TRI_VERT = include_bytes!("../target/shaders/tri.vert.spv");

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src/shaders/tri.frag
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#version 450
#extension GL_ARB_separate_shader_objects: enable
layout (location = 0) in vec3 fragColor;
layout (location = 0) out vec4 outColor;
void main() {
outColor = vec4(fragColor, 1.0);
}

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src/shaders/tri.vert
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#version 450
#extension GL_ARB_separate_shader_objects: enable
layout (location = 0) in vec2 inPosition;
layout (location = 1) in vec3 inColor;
layout (location = 0) out vec3 fragColor;
out gl_PerVertex {
vec4 gl_Position;
};
void main() {
gl_Position = vec4(inPosition, 0.0, 1.0);
fragColor = inColor;
}

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src/utility.rs
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pub mod constants;
pub mod debug;
pub mod fps_limiter;
pub mod platforms;
pub mod share;
pub mod structures;
pub mod tools;
pub mod window;

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src/utility/constants.rs
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use crate::utility::debug::ValidationInfo;
use crate::utility::structures::DeviceExtension;
use ash::vk_make_version;
use std::os::raw::c_char;
pub const APPLICATION_VERSION: u32 = vk_make_version!(1, 0, 0);
pub const ENGINE_VERSION: u32 = vk_make_version!(1, 0, 0);
pub const API_VERSION: u32 = vk_make_version!(1, 0, 92);
pub const WINDOW_WIDTH: u32 = 800;
pub const WINDOW_HEIGHT: u32 = 600;
pub const VALIDATION: ValidationInfo = ValidationInfo {
is_enable: true,
required_validation_layers: ["VK_LAYER_KHRONOS_validation"],
};
pub const DEVICE_EXTENSIONS: DeviceExtension = DeviceExtension {
names: ["VK_KHR_swapchain"],
};
pub const MAX_FRAMES_IN_FLIGHT: usize = 2;
pub const IS_PAINT_FPS_COUNTER: bool = false;
impl DeviceExtension {
pub fn get_extensions_raw_names(&self) -> [*const c_char; 1] {
[
// currently just enable the Swapchain extension.
ash::extensions::khr::Swapchain::name().as_ptr(),
]
}
}

109
src/utility/debug.rs
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use ash::version::EntryV1_0;
use ash::vk;
use std::ffi::CStr;
use std::os::raw::c_void;
use std::ptr;
unsafe extern "system" fn vulkan_debug_utils_callback(
message_severity: vk::DebugUtilsMessageSeverityFlagsEXT,
message_type: vk::DebugUtilsMessageTypeFlagsEXT,
p_callback_data: *const vk::DebugUtilsMessengerCallbackDataEXT,
_p_user_data: *mut c_void,
) -> vk::Bool32 {
let severity = match message_severity {
vk::DebugUtilsMessageSeverityFlagsEXT::VERBOSE => "[Verbose]",
vk::DebugUtilsMessageSeverityFlagsEXT::WARNING => "[Warning]",
vk::DebugUtilsMessageSeverityFlagsEXT::ERROR => "[Error]",
vk::DebugUtilsMessageSeverityFlagsEXT::INFO => "[Info]",
_ => "[Unknown]",
};
let types = match message_type {
vk::DebugUtilsMessageTypeFlagsEXT::GENERAL => "[General]",
vk::DebugUtilsMessageTypeFlagsEXT::PERFORMANCE => "[Performance]",
vk::DebugUtilsMessageTypeFlagsEXT::VALIDATION => "[Validation]",
_ => "[Unknown]",
};
let message = CStr::from_ptr((*p_callback_data).p_message);
println!("[Debug]{}{}{:?}", severity, types, message);
vk::FALSE
}
pub struct ValidationInfo {
pub is_enable: bool,
pub required_validation_layers: [&'static str; 1],
}
pub fn check_validation_layer_support(
entry: &ash::Entry,
required_validation_layers: &Vec<&str>,
) -> bool {
// if support validation layer, then return true
let layer_properties = entry
.enumerate_instance_layer_properties()
.expect("Failed to enumerate Instance Layers Properties");
if layer_properties.len() <= 0 {
eprintln!("No available layers.");
return false;
}
for required_layer_name in required_validation_layers.iter() {
let mut is_layer_found = false;
for layer_property in layer_properties.iter() {
let test_layer_name = super::tools::vk_to_string(&layer_property.layer_name);
if (*required_layer_name) == test_layer_name {
is_layer_found = true;
break;
}
}
if is_layer_found == false {
return false;
}
}
true
}
pub fn setup_debug_utils(
is_enable_debug: bool,
entry: &ash::Entry,
instance: &ash::Instance,
) -> (ash::extensions::ext::DebugUtils, vk::DebugUtilsMessengerEXT) {
let debug_utils_loader = ash::extensions::ext::DebugUtils::new(entry, instance);
if is_enable_debug == false {
(debug_utils_loader, ash::vk::DebugUtilsMessengerEXT::null())
} else {
let messenger_ci = populate_debug_messenger_create_info();
let utils_messenger = unsafe {
debug_utils_loader
.create_debug_utils_messenger(&messenger_ci, None)
.expect("Debug Utils Callback")
};
(debug_utils_loader, utils_messenger)
}
}
pub fn populate_debug_messenger_create_info() -> vk::DebugUtilsMessengerCreateInfoEXT {
vk::DebugUtilsMessengerCreateInfoEXT {
s_type: vk::StructureType::DEBUG_UTILS_MESSENGER_CREATE_INFO_EXT,
p_next: ptr::null(),
flags: vk::DebugUtilsMessengerCreateFlagsEXT::empty(),
message_severity: vk::DebugUtilsMessageSeverityFlagsEXT::WARNING |
// vk::DebugUtilsMessageSeverityFlagsEXT::VERBOSE |
// vk::DebugUtilsMessageSeverityFlagsEXT::INFO |
vk::DebugUtilsMessageSeverityFlagsEXT::ERROR,
message_type: vk::DebugUtilsMessageTypeFlagsEXT::GENERAL
| vk::DebugUtilsMessageTypeFlagsEXT::PERFORMANCE
| vk::DebugUtilsMessageTypeFlagsEXT::VALIDATION,
pfn_user_callback: Some(vulkan_debug_utils_callback),
p_user_data: ptr::null_mut(),
}
}

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src/utility/fps_limiter.rs
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use std::thread;
use std::time::Duration;
use std::time::Instant;
const SAMPLE_COUNT: usize = 5;
const SAMPLE_COUNT_FLOAT: f32 = SAMPLE_COUNT as f32;
pub struct FPSLimiter {
counter: Instant,
frame_time_prefer: u32, // unit microseconds
samples: [u32; SAMPLE_COUNT],
current_frame: usize,
delta_frame: u32,
}
impl FPSLimiter {
pub fn new() -> FPSLimiter {
const DEFAULT_PREFER_FPS: f32 = 60.0;
FPSLimiter {
counter: Instant::now(),
frame_time_prefer: (1000_000.0_f32 / DEFAULT_PREFER_FPS) as u32,
samples: [0; SAMPLE_COUNT],
current_frame: 0,
delta_frame: 0,
}
}
pub fn set_prefer_fps(&mut self, prefer_fps: f32) {
self.frame_time_prefer = (1000_000.0_f32 / prefer_fps) as u32;
}
/// Call this function in game loop to update its inner status.
pub fn tick_frame(&mut self) {
let time_elapsed = self.counter.elapsed();
self.counter = Instant::now();
self.delta_frame = time_elapsed.subsec_micros();
self.samples[self.current_frame] = self.delta_frame;
self.current_frame = (self.current_frame + 1) % SAMPLE_COUNT;
}
// TODO: this function seems not work.
pub fn keep_fps(&self) {
if self.frame_time_prefer > self.delta_frame {
let delay = Duration::from_micros((self.frame_time_prefer - self.delta_frame) as u64);
thread::sleep(delay);
}
}
/// Calculate the current FPS.
pub fn fps(&self) -> f32 {
let mut sum = 0_u32;
self.samples.iter().for_each(|val| {
sum += val;
});
1000_000.0_f32 / (sum as f32 / SAMPLE_COUNT_FLOAT)
}
/// Return current delta time in seconds
/// this function ignore its second part, since the second is mostly zero.
pub fn delta_time(&self) -> f32 {
self.delta_frame as f32 / 1000_000.0_f32 // time in second
}
}

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src/utility/platforms.rs
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use ash::version::{EntryV1_0, InstanceV1_0};
use ash::vk;
#[cfg(target_os = "windows")]
use ash::extensions::khr::Win32Surface;
#[cfg(all(unix, not(target_os = "android"), not(target_os = "macos")))]
use ash::extensions::khr::XlibSurface;
#[cfg(target_os = "macos")]
use ash::extensions::mvk::MacOSSurface;
use ash::extensions::ext::DebugUtils;
use ash::extensions::khr::Surface;
#[cfg(target_os = "macos")]
use cocoa::appkit::{NSView, NSWindow};
#[cfg(target_os = "macos")]
use cocoa::base::id as cocoa_id;
#[cfg(target_os = "macos")]
use metal::CoreAnimationLayer;
#[cfg(target_os = "macos")]
use objc::runtime::YES;
// required extension ------------------------------------------------------
#[cfg(target_os = "macos")]
pub fn required_extension_names() -> Vec<*const i8> {
vec![
Surface::name().as_ptr(),
MacOSSurface::name().as_ptr(),
DebugUtils::name().as_ptr(),
]
}
#[cfg(all(windows))]
pub fn required_extension_names() -> Vec<*const i8> {
vec![
Surface::name().as_ptr(),
Win32Surface::name().as_ptr(),
DebugUtils::name().as_ptr(),
]
}
#[cfg(all(unix, not(target_os = "android"), not(target_os = "macos")))]
pub fn required_extension_names() -> Vec<*const i8> {
vec![
Surface::name().as_ptr(),
XlibSurface::name().as_ptr(),
DebugUtils::name().as_ptr(),
]
}
// ------------------------------------------------------------------------
// create surface ---------------------------------------------------------
#[cfg(all(unix, not(target_os = "android"), not(target_os = "macos")))]
pub unsafe fn create_surface<E: EntryV1_0, I: InstanceV1_0>(
entry: &E,
instance: &I,
window: &winit::window::Window,
) -> Result<vk::SurfaceKHR, vk::Result> {
use std::ptr;
use winit::platform::unix::WindowExtUnix;
let x11_display = window.xlib_display().unwrap();
let x11_window = window.xlib_window().unwrap();
let x11_create_info = vk::XlibSurfaceCreateInfoKHR {
s_type: vk::StructureType::XLIB_SURFACE_CREATE_INFO_KHR,
p_next: ptr::null(),
flags: Default::default(),
window: x11_window as vk::Window,
dpy: x11_display as *mut vk::Display,
};
let xlib_surface_loader = XlibSurface::new(entry, instance);
xlib_surface_loader.create_xlib_surface(&x11_create_info, None)
}
#[cfg(target_os = "macos")]
pub unsafe fn create_surface<E: EntryV1_0, I: InstanceV1_0>(
entry: &E,
instance: &I,
window: &winit::window::Window,
) -> Result<vk::SurfaceKHR, vk::Result> {
use std::mem;
use std::os::raw::c_void;
use std::ptr;
use winit::platform::macos::WindowExtMacOS;
let wnd: cocoa_id = mem::transmute(window.ns_window());
let layer = CoreAnimationLayer::new();
layer.set_edge_antialiasing_mask(0);
layer.set_presents_with_transaction(false);
layer.remove_all_animations();
let view = wnd.contentView();
layer.set_contents_scale(view.backingScaleFactor());
view.setLayer(mem::transmute(layer.as_ref()));
view.setWantsLayer(YES);
let create_info = vk::MacOSSurfaceCreateInfoMVK {
s_type: vk::StructureType::MACOS_SURFACE_CREATE_INFO_M,
p_next: ptr::null(),
flags: Default::default(),
p_view: window.ns_view() as *const c_void,
};
let macos_surface_loader = MacOSSurface::new(entry, instance);
macos_surface_loader.create_mac_os_surface_mvk(&create_info, None)
}
#[cfg(target_os = "windows")]
pub unsafe fn create_surface<E: EntryV1_0, I: InstanceV1_0>(
entry: &E,
instance: &I,
window: &winit::window::Window,
) -> Result<vk::SurfaceKHR, vk::Result> {
use std::os::raw::c_void;
use std::ptr;
use winapi::shared::windef::HWND;
use winapi::um::libloaderapi::GetModuleHandleW;
use winit::platform::windows::WindowExtWindows;
let hwnd = window.hwnd() as HWND;
let hinstance = GetModuleHandleW(ptr::null()) as *const c_void;
let win32_create_info = vk::Win32SurfaceCreateInfoKHR {
s_type: vk::StructureType::WIN32_SURFACE_CREATE_INFO_KHR,
p_next: ptr::null(),
flags: Default::default(),
hinstance,
hwnd: hwnd as *const c_void,
};
let win32_surface_loader = Win32Surface::new(entry, instance);
win32_surface_loader.create_win32_surface(&win32_create_info, None)
}

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src/utility/share.rs
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src/utility/structures.rs
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use ash::vk;
use cgmath::Matrix4;
use memoffset::offset_of;
pub struct DeviceExtension {
pub names: [&'static str; 1],
// pub raw_names: [*const i8; 1],
}
pub struct SurfaceStuff {
pub surface_loader: ash::extensions::khr::Surface,
pub surface: vk::SurfaceKHR,
pub screen_width: u32,
pub screen_height: u32,
}
pub struct SwapChainStuff {
pub swapchain_loader: ash::extensions::khr::Swapchain,
pub swapchain: vk::SwapchainKHR,
pub swapchain_images: Vec<vk::Image>,
pub swapchain_format: vk::Format,
pub swapchain_extent: vk::Extent2D,
}
pub struct SwapChainSupportDetail {
pub capabilities: vk::SurfaceCapabilitiesKHR,
pub formats: Vec<vk::SurfaceFormatKHR>,
pub present_modes: Vec<vk::PresentModeKHR>,
}
pub struct QueueFamilyIndices {
pub graphics_family: Option<u32>,
pub present_family: Option<u32>,
}
impl QueueFamilyIndices {
pub fn new() -> QueueFamilyIndices {
QueueFamilyIndices {
graphics_family: None,
present_family: None,
}
}
pub fn is_complete(&self) -> bool {
self.graphics_family.is_some() && self.present_family.is_some()
}
}
pub struct SyncObjects {
pub image_available_semaphores: Vec<vk::Semaphore>,
pub render_finished_semaphores: Vec<vk::Semaphore>,
pub inflight_fences: Vec<vk::Fence>,
}
#[repr(C)]
#[derive(Clone, Debug, Copy)]
pub struct UniformBufferObject {
pub model: Matrix4<f32>,
pub view: Matrix4<f32>,
pub proj: Matrix4<f32>,
}
#[repr(C)]
#[derive(Clone, Debug, Copy)]
pub struct VertexV1 {
pub pos: [f32; 2],
pub color: [f32; 3],
}
impl VertexV1 {
pub fn get_binding_description() -> [vk::VertexInputBindingDescription; 1] {
[vk::VertexInputBindingDescription {
binding: 0,
stride: ::std::mem::size_of::<VertexV1>() as u32,
input_rate: vk::VertexInputRate::VERTEX,
}]
}
pub fn get_attribute_descriptions() -> [vk::VertexInputAttributeDescription; 2] {
[
vk::VertexInputAttributeDescription {
binding: 0,
location: 0,
format: vk::Format::R32G32_SFLOAT,
offset: offset_of!(VertexV1, pos) as u32,
},
vk::VertexInputAttributeDescription {
binding: 0,
location: 1,
format: vk::Format::R32G32B32_SFLOAT,
offset: offset_of!(VertexV1, color) as u32,
},
]
}
}
#[repr(C)]
#[derive(Debug, Clone, Copy)]
pub struct VertexV3 {
pub pos: [f32; 4],
pub color: [f32; 4],
pub tex_coord: [f32; 2],
}
impl VertexV3 {
pub fn get_binding_descriptions() -> [vk::VertexInputBindingDescription; 1] {
[vk::VertexInputBindingDescription {
binding: 0,
stride: ::std::mem::size_of::<Self>() as u32,
input_rate: vk::VertexInputRate::VERTEX,
}]
}
pub fn get_attribute_descriptions() -> [vk::VertexInputAttributeDescription; 3] {
[
vk::VertexInputAttributeDescription {
binding: 0,
location: 0,
format: vk::Format::R32G32B32A32_SFLOAT,
offset: offset_of!(Self, pos) as u32,
},
vk::VertexInputAttributeDescription {
binding: 0,
location: 1,
format: vk::Format::R32G32B32A32_SFLOAT,
offset: offset_of!(Self, color) as u32,
},
vk::VertexInputAttributeDescription {
binding: 0,
location: 2,
format: vk::Format::R32G32_SFLOAT,
offset: offset_of!(Self, tex_coord) as u32,
},
]
}
}
pub const RECT_VERTICES_DATA: [VertexV1; 4] = [
VertexV1 {
pos: [-0.5, -0.5],
color: [1.0, 0.0, 0.0],
},
VertexV1 {
pos: [0.5, -0.5],
color: [0.0, 1.0, 0.0],
},
VertexV1 {
pos: [0.5, 0.5],
color: [0.0, 0.0, 1.0],
},
VertexV1 {
pos: [-0.5, 0.5],
color: [1.0, 1.0, 1.0],
},
];
pub const RECT_INDICES_DATA: [u32; 6] = [0, 1, 2, 2, 3, 0];

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src/utility/tools.rs
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use std::ffi::CStr;
use std::os::raw::c_char;
use std::path::Path;
/// Helper function to convert [c_char; SIZE] to string
pub fn vk_to_string(raw_string_array: &[c_char]) -> String {
// Implementation 1
// let end = '\0' as u8;
//
// let mut content: Vec<u8> = vec![];
//
// for ch in raw_string_array.iter() {
// let ch = (*ch) as u8;
//
// if ch != end {
// content.push(ch);
// } else {
// break
// }
// }
//
// String::from_utf8(content)
// .expect("Failed to convert vulkan raw string")
// Implementation 2
let raw_string = unsafe {
let pointer = raw_string_array.as_ptr();
CStr::from_ptr(pointer)
};
raw_string
.to_str()
.expect("Failed to convert vulkan raw string.")
.to_owned()
}
pub fn read_shader_code(shader_path: &Path) -> Vec<u8> {
use std::fs::File;
use std::io::Read;
let spv_file =
File::open(shader_path).expect(&format!("Failed to find spv file at {:?}", shader_path));
let bytes_code: Vec<u8> = spv_file.bytes().filter_map(|byte| byte.ok()).collect();
bytes_code
}

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use winit::event::{Event, VirtualKeyCode, ElementState, KeyboardInput, WindowEvent};
use winit::event_loop::{EventLoop, ControlFlow};
const IS_PAINT_FPS_COUNTER: bool = true;
pub fn init_window(
event_loop: &EventLoop<()>,
title: &str,
width: u32,
height: u32,
) -> winit::window::Window {
winit::window::WindowBuilder::new()
.with_title(title)
.with_inner_size(winit::dpi::LogicalSize::new(width, height))
.build(event_loop)
.expect("Failed to create window.")
}
pub trait VulkanApp {
fn draw_frame(&mut self, delta_time: f32);
fn recreate_swapchain(&mut self);
fn cleanup_swapchain(&self);
fn wait_device_idle(&self);
fn resize_framebuffer(&mut self);
fn window_ref(&self) -> &winit::window::Window;
}
pub struct ProgramProc {
pub event_loop: EventLoop<()>,
}
impl ProgramProc {
pub fn new() -> ProgramProc {
// init window stuff
let event_loop = EventLoop::new();
ProgramProc { event_loop }
}
pub fn main_loop<A: 'static + VulkanApp>(self, mut vulkan_app: A) {
let mut tick_counter = super::fps_limiter::FPSLimiter::new();
self.event_loop.run(move |event, _, control_flow| {
match event {
| Event::WindowEvent { event, .. } => {
match event {
| WindowEvent::CloseRequested => {
vulkan_app.wait_device_idle();
*control_flow = ControlFlow::Exit
},
| WindowEvent::KeyboardInput { input, .. } => {
match input {
| KeyboardInput { virtual_keycode, state, .. } => {
match (virtual_keycode, state) {
| (Some(VirtualKeyCode::Escape), ElementState::Pressed) => {
vulkan_app.wait_device_idle();
*control_flow = ControlFlow::Exit
},
| _ => {},
}
},
}
},
| WindowEvent::Resized(_new_size) => {
vulkan_app.wait_device_idle();
vulkan_app.resize_framebuffer();
},
| _ => {},
}
},
| Event::MainEventsCleared => {
vulkan_app.window_ref().request_redraw();
},
| Event::RedrawRequested(_window_id) => {
let delta_time = tick_counter.delta_time();
vulkan_app.draw_frame(delta_time);
if IS_PAINT_FPS_COUNTER {
print!("FPS: {}\r", tick_counter.fps());
}
tick_counter.tick_frame();
},
| Event::LoopDestroyed => {
vulkan_app.wait_device_idle();
},
_ => (),
}
})
}
}
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