mirror of
https://github.com/vulkano-rs/vulkano.git
synced 2024-11-25 16:25:31 +00:00
4a77d39b85
* Update winit * Update raw-window-handle * Update syn * Remove vulkano-win from the workspace
827 lines
29 KiB
Rust
827 lines
29 KiB
Rust
fn main() -> Result<(), winit::error::EventLoopError> {
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#[cfg(target_os = "linux")]
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{
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linux::main()
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}
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#[cfg(not(target_os = "linux"))]
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{
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Ok(println!("Not Implemented"))
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}
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}
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// TODO: Can this be demonstrated for other platforms as well?
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#[cfg(target_os = "linux")]
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mod linux {
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use glium::glutin::{self, platform::unix::HeadlessContextExt};
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use std::{
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sync::{Arc, Barrier},
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time::Instant,
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};
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use vulkano::{
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buffer::{Buffer, BufferContents, BufferCreateInfo, BufferUsage, Subbuffer},
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command_buffer::{
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allocator::StandardCommandBufferAllocator, AutoCommandBufferBuilder,
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CommandBufferUsage, RenderPassBeginInfo, SemaphoreSubmitInfo, SubmitInfo,
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},
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descriptor_set::{
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allocator::StandardDescriptorSetAllocator, PersistentDescriptorSet, WriteDescriptorSet,
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},
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device::{
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physical::PhysicalDeviceType, Device, DeviceCreateInfo, DeviceExtensions, Queue,
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QueueCreateInfo, QueueFlags,
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},
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format::Format,
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image::{
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sampler::{Filter, Sampler, SamplerAddressMode, SamplerCreateInfo},
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sys::RawImage,
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view::ImageView,
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Image, ImageCreateFlags, ImageCreateInfo, ImageType, ImageUsage,
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},
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instance::{
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debug::{
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DebugUtilsMessenger, DebugUtilsMessengerCallback, DebugUtilsMessengerCreateInfo,
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},
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Instance, InstanceCreateFlags, InstanceCreateInfo, InstanceExtensions,
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},
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memory::{
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allocator::{
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AllocationCreateInfo, MemoryAllocator, MemoryTypeFilter, StandardMemoryAllocator,
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},
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DedicatedAllocation, DeviceMemory, ExternalMemoryHandleType, ExternalMemoryHandleTypes,
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MemoryAllocateInfo, ResourceMemory,
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},
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pipeline::{
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graphics::{
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color_blend::{AttachmentBlend, ColorBlendAttachmentState, ColorBlendState},
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input_assembly::{InputAssemblyState, PrimitiveTopology},
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multisample::MultisampleState,
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rasterization::RasterizationState,
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vertex_input::{Vertex, VertexDefinition},
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viewport::{Viewport, ViewportState},
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GraphicsPipelineCreateInfo,
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},
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layout::PipelineDescriptorSetLayoutCreateInfo,
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DynamicState, GraphicsPipeline, Pipeline, PipelineBindPoint, PipelineLayout,
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PipelineShaderStageCreateInfo,
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},
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render_pass::{Framebuffer, FramebufferCreateInfo, RenderPass, Subpass},
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swapchain::{
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acquire_next_image, Surface, Swapchain, SwapchainCreateInfo, SwapchainPresentInfo,
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},
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sync::{
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now,
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semaphore::{
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ExternalSemaphoreHandleType, ExternalSemaphoreHandleTypes, Semaphore,
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SemaphoreCreateInfo,
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},
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GpuFuture,
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},
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Validated, VulkanError, VulkanLibrary,
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};
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use winit::{
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event::{Event, WindowEvent},
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event_loop::{ControlFlow, EventLoop},
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window::{Window, WindowBuilder},
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};
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pub fn main() -> Result<(), winit::error::EventLoopError> {
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let event_loop_gl = winit_glium::event_loop::EventLoop::new();
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// For some reason, this must be created before the vulkan window
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let hrb = glutin::ContextBuilder::new()
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.with_gl_debug_flag(true)
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.with_gl(glutin::GlRequest::Latest)
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.build_surfaceless(&event_loop_gl)
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.unwrap();
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let hrb_vk = glutin::ContextBuilder::new()
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.with_gl_debug_flag(true)
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.with_gl(glutin::GlRequest::Latest)
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.build_surfaceless(&event_loop_gl)
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.unwrap();
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// Used for checking device and driver UUIDs.
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let display = glium::HeadlessRenderer::with_debug(
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hrb_vk,
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glium::debug::DebugCallbackBehavior::PrintAll,
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)
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.unwrap();
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let event_loop = EventLoop::new().unwrap();
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let (
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device,
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_instance,
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mut swapchain,
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window,
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mut viewport,
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queue,
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render_pass,
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mut framebuffers,
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sampler,
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pipeline,
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memory_allocator,
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vertex_buffer,
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) = vk_setup(display, &event_loop);
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let raw_image = RawImage::new(
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device.clone(),
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ImageCreateInfo {
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flags: ImageCreateFlags::MUTABLE_FORMAT,
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image_type: ImageType::Dim2d,
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format: Format::R16G16B16A16_UNORM,
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extent: [200, 200, 1],
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usage: ImageUsage::TRANSFER_SRC | ImageUsage::TRANSFER_DST | ImageUsage::SAMPLED,
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external_memory_handle_types: ExternalMemoryHandleTypes::OPAQUE_FD,
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..Default::default()
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},
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)
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.unwrap();
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let image_requirements = raw_image.memory_requirements()[0];
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let image_memory = DeviceMemory::allocate(
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device.clone(),
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MemoryAllocateInfo {
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allocation_size: image_requirements.layout.size(),
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memory_type_index: memory_allocator
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.find_memory_type_index(
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image_requirements.memory_type_bits,
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MemoryTypeFilter::PREFER_DEVICE,
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)
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.unwrap(),
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dedicated_allocation: Some(DedicatedAllocation::Image(&raw_image)),
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export_handle_types: ExternalMemoryHandleTypes::OPAQUE_FD,
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..Default::default()
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},
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)
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.unwrap();
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let allocation_size = image_memory.allocation_size();
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let image_fd = image_memory
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.export_fd(ExternalMemoryHandleType::OpaqueFd)
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.unwrap();
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let image = Arc::new(
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raw_image
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.bind_memory([ResourceMemory::new_dedicated(image_memory)])
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.map_err(|(err, _, _)| err)
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.unwrap(),
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);
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let image_view = ImageView::new_default(image).unwrap();
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let barrier = Arc::new(Barrier::new(2));
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let barrier_2 = Arc::new(Barrier::new(2));
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let acquire_sem = Arc::new(
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Semaphore::new(
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device.clone(),
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SemaphoreCreateInfo {
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export_handle_types: ExternalSemaphoreHandleTypes::OPAQUE_FD,
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..Default::default()
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},
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)
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.unwrap(),
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);
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let release_sem = Arc::new(
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Semaphore::new(
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device.clone(),
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SemaphoreCreateInfo {
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export_handle_types: ExternalSemaphoreHandleTypes::OPAQUE_FD,
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..Default::default()
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},
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)
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.unwrap(),
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);
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let acquire_fd = unsafe {
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acquire_sem
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.export_fd(ExternalSemaphoreHandleType::OpaqueFd)
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.unwrap()
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};
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let release_fd = unsafe {
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release_sem
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.export_fd(ExternalSemaphoreHandleType::OpaqueFd)
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.unwrap()
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};
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let barrier_clone = barrier.clone();
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let barrier_2_clone = barrier_2.clone();
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build_display(hrb, move |gl_display| {
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let gl_tex = unsafe {
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glium::texture::Texture2d::new_from_fd(
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gl_display.as_ref(),
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glium::texture::UncompressedFloatFormat::U16U16U16U16,
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glium::texture::MipmapsOption::NoMipmap,
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glium::texture::Dimensions::Texture2d {
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width: 200,
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height: 200,
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},
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glium::texture::ImportParameters {
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dedicated_memory: true,
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size: allocation_size,
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offset: 0,
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tiling: glium::texture::ExternalTilingMode::Optimal,
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},
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image_fd,
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)
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}
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.unwrap();
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let gl_acquire_sem = unsafe {
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glium::semaphore::Semaphore::new_from_fd(gl_display.as_ref(), acquire_fd).unwrap()
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};
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let gl_release_sem = unsafe {
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glium::semaphore::Semaphore::new_from_fd(gl_display.as_ref(), release_fd).unwrap()
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};
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let rotation_start = Instant::now();
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loop {
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barrier_clone.wait();
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gl_acquire_sem
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.wait_textures(Some(&[(&gl_tex, glium::semaphore::TextureLayout::General)]));
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gl_display.get_context().flush();
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let elapsed = rotation_start.elapsed();
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let rotation = elapsed.as_nanos() as f64 / 2_000_000_000.0;
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use glium::Surface;
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{
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let mut fb = gl_tex.as_surface();
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fb.clear_color(
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0.0,
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(((rotation as f32).sin() + 1.) / 2.).powf(2.2),
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0.0,
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1.0,
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);
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}
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gl_release_sem
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.signal_textures(Some(&[(&gl_tex, glium::semaphore::TextureLayout::General)]));
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barrier_2_clone.wait();
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gl_display.get_context().finish();
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gl_display.get_context().assert_no_error(Some("err"));
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}
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});
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let descriptor_set_allocator =
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StandardDescriptorSetAllocator::new(device.clone(), Default::default());
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let command_buffer_allocator =
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StandardCommandBufferAllocator::new(device.clone(), Default::default());
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let layout = pipeline.layout().set_layouts().get(0).unwrap();
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let set = PersistentDescriptorSet::new(
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&descriptor_set_allocator,
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layout.clone(),
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[
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WriteDescriptorSet::sampler(0, sampler),
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WriteDescriptorSet::image_view(1, image_view),
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],
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[],
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)
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.unwrap();
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let mut recreate_swapchain = false;
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let mut previous_frame_end: Option<Box<dyn GpuFuture>> =
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Some(Box::new(now(device.clone())));
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event_loop.run(move |event, elwt| {
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elwt.set_control_flow(ControlFlow::Poll);
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match event {
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Event::WindowEvent {
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event: WindowEvent::CloseRequested,
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..
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} => {
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elwt.exit();
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}
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Event::WindowEvent {
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event: WindowEvent::Resized(_),
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..
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} => {
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recreate_swapchain = true;
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}
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Event::WindowEvent {
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event: WindowEvent::RedrawRequested,
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..
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} => {
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queue
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.with(|mut q| unsafe {
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q.submit(
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&[SubmitInfo {
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signal_semaphores: vec![SemaphoreSubmitInfo::new(
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acquire_sem.clone(),
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)],
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..Default::default()
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}],
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None,
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)
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})
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.unwrap();
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barrier.wait();
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barrier_2.wait();
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queue
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.with(|mut q| unsafe {
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q.submit(
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&[SubmitInfo {
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wait_semaphores: vec![SemaphoreSubmitInfo::new(
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release_sem.clone(),
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)],
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..Default::default()
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}],
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None,
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)
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})
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.unwrap();
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let image_extent: [u32; 2] = window.inner_size().into();
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if image_extent.contains(&0) {
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return;
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}
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previous_frame_end.as_mut().unwrap().cleanup_finished();
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if recreate_swapchain {
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let (new_swapchain, new_images) = swapchain
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.recreate(SwapchainCreateInfo {
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image_extent,
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..swapchain.create_info()
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})
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.expect("failed to recreate swapchain");
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swapchain = new_swapchain;
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framebuffers = window_size_dependent_setup(
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&new_images,
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render_pass.clone(),
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&mut viewport,
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);
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recreate_swapchain = false;
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}
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let (image_index, suboptimal, acquire_future) = match acquire_next_image(
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swapchain.clone(),
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None,
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)
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.map_err(Validated::unwrap)
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{
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Ok(r) => r,
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Err(VulkanError::OutOfDate) => {
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recreate_swapchain = true;
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return;
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}
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Err(e) => panic!("failed to acquire next image: {e}"),
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};
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if suboptimal {
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recreate_swapchain = true;
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}
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let mut builder = AutoCommandBufferBuilder::primary(
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&command_buffer_allocator,
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queue.queue_family_index(),
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CommandBufferUsage::OneTimeSubmit,
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)
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.unwrap();
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builder
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.begin_render_pass(
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RenderPassBeginInfo {
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clear_values: vec![Some([0.0, 0.0, 1.0, 1.0].into())],
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..RenderPassBeginInfo::framebuffer(
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framebuffers[image_index as usize].clone(),
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)
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},
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Default::default(),
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)
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.unwrap()
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.set_viewport(0, [viewport.clone()].into_iter().collect())
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.unwrap()
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.bind_pipeline_graphics(pipeline.clone())
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.unwrap()
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.bind_descriptor_sets(
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PipelineBindPoint::Graphics,
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pipeline.layout().clone(),
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0,
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set.clone(),
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)
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.unwrap()
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.bind_vertex_buffers(0, vertex_buffer.clone())
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.unwrap()
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.draw(vertex_buffer.len() as u32, 1, 0, 0)
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.unwrap()
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.end_render_pass(Default::default())
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.unwrap();
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let command_buffer = builder.build().unwrap();
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let future = previous_frame_end.take().unwrap().join(acquire_future);
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let future = future
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.then_execute(queue.clone(), command_buffer)
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.unwrap()
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.then_swapchain_present(
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queue.clone(),
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SwapchainPresentInfo::swapchain_image_index(
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swapchain.clone(),
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image_index,
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),
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)
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.then_signal_fence_and_flush();
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match future.map_err(Validated::unwrap) {
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Ok(future) => {
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future.wait(None).unwrap();
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previous_frame_end = Some(future.boxed());
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}
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Err(VulkanError::OutOfDate) => {
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recreate_swapchain = true;
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previous_frame_end = Some(vulkano::sync::now(device.clone()).boxed());
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}
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Err(e) => {
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println!("failed to flush future: {e}");
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previous_frame_end = Some(vulkano::sync::now(device.clone()).boxed());
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}
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};
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}
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Event::AboutToWait => window.request_redraw(),
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_ => (),
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};
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})
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}
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#[derive(BufferContents, Vertex)]
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#[repr(C)]
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struct MyVertex {
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#[format(R32G32_SFLOAT)]
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position: [f32; 2],
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}
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#[allow(clippy::type_complexity)]
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fn vk_setup(
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display: glium::HeadlessRenderer,
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event_loop: &EventLoop<()>,
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) -> (
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Arc<Device>,
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Arc<Instance>,
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Arc<Swapchain>,
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Arc<Window>,
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Viewport,
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Arc<Queue>,
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Arc<RenderPass>,
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Vec<Arc<Framebuffer>>,
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Arc<Sampler>,
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Arc<GraphicsPipeline>,
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Arc<StandardMemoryAllocator>,
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Subbuffer<[MyVertex]>,
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) {
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let library = VulkanLibrary::new().unwrap();
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let required_extensions = Surface::required_extensions(&event_loop).unwrap();
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let instance = Instance::new(
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library,
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InstanceCreateInfo {
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flags: InstanceCreateFlags::ENUMERATE_PORTABILITY,
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enabled_extensions: InstanceExtensions {
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khr_get_physical_device_properties2: true,
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khr_external_memory_capabilities: true,
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khr_external_semaphore_capabilities: true,
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khr_external_fence_capabilities: true,
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ext_debug_utils: true,
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..required_extensions
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},
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..Default::default()
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},
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)
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.unwrap();
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let _debug_callback = unsafe {
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DebugUtilsMessenger::new(
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instance.clone(),
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DebugUtilsMessengerCreateInfo::user_callback(DebugUtilsMessengerCallback::new(
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|message_severity, message_type, callback_data| {
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println!(
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"{} {:?} {:?}: {}",
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callback_data.message_id_name.unwrap_or("unknown"),
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message_type,
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message_severity,
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callback_data.message,
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);
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},
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)),
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)
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.unwrap()
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};
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|
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let window = Arc::new(WindowBuilder::new().build(event_loop).unwrap());
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let surface = Surface::from_window(instance.clone(), window.clone()).unwrap();
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let device_extensions = DeviceExtensions {
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khr_external_semaphore: true,
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khr_external_semaphore_fd: true,
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khr_external_memory: true,
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khr_external_memory_fd: true,
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khr_external_fence: true,
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khr_external_fence_fd: true,
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khr_swapchain: true,
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..DeviceExtensions::empty()
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};
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|
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let (physical_device, queue_family_index) = instance
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.enumerate_physical_devices()
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.unwrap()
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.filter(|p| p.supported_extensions().contains(&device_extensions))
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|
.filter_map(|p| {
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p.queue_family_properties()
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.iter()
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.enumerate()
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.position(|(i, q)| {
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q.queue_flags.intersects(QueueFlags::GRAPHICS)
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&& p.surface_support(i as u32, &surface).unwrap_or(false)
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})
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.map(|i| (p, i as u32))
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})
|
|
.filter(|(p, _)| p.properties().driver_uuid.unwrap() == display.driver_uuid().unwrap())
|
|
.filter(|(p, _)| {
|
|
display
|
|
.device_uuids()
|
|
.unwrap()
|
|
.contains(&p.properties().device_uuid.unwrap())
|
|
})
|
|
.min_by_key(|(p, _)| match p.properties().device_type {
|
|
PhysicalDeviceType::DiscreteGpu => 0,
|
|
PhysicalDeviceType::IntegratedGpu => 1,
|
|
PhysicalDeviceType::VirtualGpu => 2,
|
|
PhysicalDeviceType::Cpu => 3,
|
|
PhysicalDeviceType::Other => 4,
|
|
_ => 5,
|
|
})
|
|
.unwrap();
|
|
|
|
println!(
|
|
"Using device: {} (type: {:?})",
|
|
physical_device.properties().device_name,
|
|
physical_device.properties().device_type,
|
|
);
|
|
|
|
let (device, mut queues) = Device::new(
|
|
physical_device,
|
|
DeviceCreateInfo {
|
|
enabled_extensions: device_extensions,
|
|
queue_create_infos: vec![QueueCreateInfo {
|
|
queue_family_index,
|
|
..Default::default()
|
|
}],
|
|
..Default::default()
|
|
},
|
|
)
|
|
.unwrap();
|
|
|
|
let queue = queues.next().unwrap();
|
|
|
|
let (swapchain, images) = {
|
|
let surface_capabilities = device
|
|
.physical_device()
|
|
.surface_capabilities(&surface, Default::default())
|
|
.unwrap();
|
|
let image_format = device
|
|
.physical_device()
|
|
.surface_formats(&surface, Default::default())
|
|
.unwrap()[0]
|
|
.0;
|
|
|
|
Swapchain::new(
|
|
device.clone(),
|
|
surface,
|
|
SwapchainCreateInfo {
|
|
min_image_count: surface_capabilities.min_image_count.max(2),
|
|
image_format,
|
|
image_extent: window.inner_size().into(),
|
|
image_usage: ImageUsage::COLOR_ATTACHMENT,
|
|
composite_alpha: surface_capabilities
|
|
.supported_composite_alpha
|
|
.into_iter()
|
|
.next()
|
|
.unwrap(),
|
|
..Default::default()
|
|
},
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
let memory_allocator = Arc::new(StandardMemoryAllocator::new_default(device.clone()));
|
|
|
|
let vertices = [
|
|
MyVertex {
|
|
position: [-0.5, -0.5],
|
|
},
|
|
MyVertex {
|
|
position: [-0.5, 0.5],
|
|
},
|
|
MyVertex {
|
|
position: [0.5, -0.5],
|
|
},
|
|
MyVertex {
|
|
position: [0.5, 0.5],
|
|
},
|
|
];
|
|
let vertex_buffer = Buffer::from_iter(
|
|
memory_allocator.clone(),
|
|
BufferCreateInfo {
|
|
usage: BufferUsage::VERTEX_BUFFER,
|
|
..Default::default()
|
|
},
|
|
AllocationCreateInfo {
|
|
memory_type_filter: MemoryTypeFilter::PREFER_DEVICE
|
|
| MemoryTypeFilter::HOST_SEQUENTIAL_WRITE,
|
|
..Default::default()
|
|
},
|
|
vertices,
|
|
)
|
|
.unwrap();
|
|
|
|
let render_pass = vulkano::single_pass_renderpass!(device.clone(),
|
|
attachments: {
|
|
color: {
|
|
format: swapchain.image_format(),
|
|
samples: 1,
|
|
load_op: Clear,
|
|
store_op: Store,
|
|
},
|
|
},
|
|
pass: {
|
|
color: [color],
|
|
depth_stencil: {},
|
|
},
|
|
)
|
|
.unwrap();
|
|
|
|
let sampler = Sampler::new(
|
|
device.clone(),
|
|
SamplerCreateInfo {
|
|
mag_filter: Filter::Linear,
|
|
min_filter: Filter::Linear,
|
|
address_mode: [SamplerAddressMode::Repeat; 3],
|
|
..Default::default()
|
|
},
|
|
)
|
|
.unwrap();
|
|
|
|
let pipeline = {
|
|
let vs = vs::load(device.clone())
|
|
.unwrap()
|
|
.entry_point("main")
|
|
.unwrap();
|
|
let fs = fs::load(device.clone())
|
|
.unwrap()
|
|
.entry_point("main")
|
|
.unwrap();
|
|
let vertex_input_state = MyVertex::per_vertex()
|
|
.definition(&vs.info().input_interface)
|
|
.unwrap();
|
|
let stages = [
|
|
PipelineShaderStageCreateInfo::new(vs),
|
|
PipelineShaderStageCreateInfo::new(fs),
|
|
];
|
|
let layout = PipelineLayout::new(
|
|
device.clone(),
|
|
PipelineDescriptorSetLayoutCreateInfo::from_stages(&stages)
|
|
.into_pipeline_layout_create_info(device.clone())
|
|
.unwrap(),
|
|
)
|
|
.unwrap();
|
|
let subpass = Subpass::from(render_pass.clone(), 0).unwrap();
|
|
|
|
GraphicsPipeline::new(
|
|
device.clone(),
|
|
None,
|
|
GraphicsPipelineCreateInfo {
|
|
stages: stages.into_iter().collect(),
|
|
vertex_input_state: Some(vertex_input_state),
|
|
input_assembly_state: Some(InputAssemblyState {
|
|
topology: PrimitiveTopology::TriangleStrip,
|
|
..Default::default()
|
|
}),
|
|
viewport_state: Some(ViewportState::default()),
|
|
rasterization_state: Some(RasterizationState::default()),
|
|
multisample_state: Some(MultisampleState::default()),
|
|
color_blend_state: Some(ColorBlendState::with_attachment_states(
|
|
subpass.num_color_attachments(),
|
|
ColorBlendAttachmentState {
|
|
blend: Some(AttachmentBlend::alpha()),
|
|
..Default::default()
|
|
},
|
|
)),
|
|
dynamic_state: [DynamicState::Viewport].into_iter().collect(),
|
|
subpass: Some(subpass.into()),
|
|
..GraphicsPipelineCreateInfo::layout(layout)
|
|
},
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
let mut viewport = Viewport {
|
|
offset: [0.0, 0.0],
|
|
extent: [0.0, 0.0],
|
|
depth_range: 0.0..=1.0,
|
|
};
|
|
let framebuffers = window_size_dependent_setup(&images, render_pass.clone(), &mut viewport);
|
|
|
|
(
|
|
device,
|
|
instance,
|
|
swapchain,
|
|
window,
|
|
viewport,
|
|
queue,
|
|
render_pass,
|
|
framebuffers,
|
|
sampler,
|
|
pipeline,
|
|
memory_allocator,
|
|
vertex_buffer,
|
|
)
|
|
}
|
|
|
|
fn build_display<F>(ctx: glutin::Context<glutin::NotCurrent>, f: F)
|
|
where
|
|
F: FnOnce(Box<dyn glium::backend::Facade>),
|
|
F: Send + 'static,
|
|
{
|
|
std::thread::spawn(move || {
|
|
let display = Box::new(
|
|
glium::HeadlessRenderer::with_debug(
|
|
ctx,
|
|
glium::debug::DebugCallbackBehavior::PrintAll,
|
|
)
|
|
.unwrap(),
|
|
);
|
|
|
|
f(display);
|
|
});
|
|
}
|
|
|
|
fn window_size_dependent_setup(
|
|
images: &[Arc<Image>],
|
|
render_pass: Arc<RenderPass>,
|
|
viewport: &mut Viewport,
|
|
) -> Vec<Arc<Framebuffer>> {
|
|
let extent = images[0].extent();
|
|
viewport.extent = [extent[0] as f32, extent[1] as f32];
|
|
|
|
images
|
|
.iter()
|
|
.map(|image| {
|
|
let view = ImageView::new_default(image.clone()).unwrap();
|
|
|
|
Framebuffer::new(
|
|
render_pass.clone(),
|
|
FramebufferCreateInfo {
|
|
attachments: vec![view],
|
|
..Default::default()
|
|
},
|
|
)
|
|
.unwrap()
|
|
})
|
|
.collect::<Vec<_>>()
|
|
}
|
|
|
|
mod vs {
|
|
vulkano_shaders::shader! {
|
|
ty: "vertex",
|
|
src: r"
|
|
#version 450
|
|
layout(location = 0) in vec2 position;
|
|
layout(location = 0) out vec2 tex_coords;
|
|
void main() {
|
|
gl_Position = vec4(position, 0.0, 1.0);
|
|
tex_coords = position + vec2(0.5);
|
|
}
|
|
",
|
|
}
|
|
}
|
|
|
|
mod fs {
|
|
vulkano_shaders::shader! {
|
|
ty: "fragment",
|
|
src: r"
|
|
#version 450
|
|
layout(location = 0) in vec2 tex_coords;
|
|
layout(location = 0) out vec4 f_color;
|
|
|
|
layout(set = 0, binding = 0) uniform sampler s;
|
|
layout(set = 0, binding = 1) uniform texture2D tex;
|
|
|
|
void main() {
|
|
f_color = texture(sampler2D(tex, s), tex_coords);
|
|
}
|
|
",
|
|
}
|
|
}
|
|
}
|