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b2b486be84
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use vulkano::buffer::{BufferUsage, CpuAccessibleBuffer, DeviceLocalBuffer, ImmutableBuffer, BufferAccess};
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use vulkano::command_buffer::AutoCommandBufferBuilder;
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use vulkano::descriptor::descriptor_set::PersistentDescriptorSet;
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use vulkano::device::{Device, DeviceExtensions, QueuesIter, Queue};
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use vulkano::instance::{Instance, InstanceExtensions, PhysicalDevice, QueueFamily};
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use vulkano::pipeline::ComputePipeline;
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use vulkano::sync::GpuFuture;
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use vulkano::sync;
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use std::time::SystemTime;
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use std::sync::Arc;
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use std::ffi::CStr;
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use std::path::PathBuf;
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use shade_runner as sr;
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use image::DynamicImage;
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pub struct VkProcessor<'a> {
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instance: Arc<Instance>,
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physical: PhysicalDevice<'a>,
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queue_family: QueueFamily<'a>,
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device: Arc<Device>,
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queues: QueuesIter,
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queue: Arc<Queue>,
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img: Option<DynamicImage>,
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image_buffer: Vec<u8>,
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buffers: Vec::
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}
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impl VkProcessor {
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pub fn new() -> VkProcessor {
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let instance = Instance::new(None, &InstanceExtensions::none(), None).unwrap();
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let physical = PhysicalDevice::enumerate(&instance).next().unwrap();
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let queue_family = physical.queue_families().find(|&q| q.supports_compute()).unwrap();
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let (device, mut queues) = Device::new(physical,
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physical.supported_features(),
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&DeviceExtensions::none(),
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[(queue_family, 0.5)].iter().cloned()).unwrap();
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VkProcessor {
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instance: instance,
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physical: physical,
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queue_family: queue_family,
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device: device,
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queues: queues,
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queue: queues.next().unwrap(),
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img: Option::None,
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image_buffer: Vec::new(),
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buffers: Vec::new(),
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}
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}
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pub fn compile_kernel(&mut self) {
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let project_root = std::env::current_dir().expect("failed to get root directory");
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let mut compute_path = project_root.clone();
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compute_path.push(PathBuf::from("resources/shaders/simple-homogenize.compute"));
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let shader = sr::load_compute(compute_path).expect("Failed to compile");
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let vulkano_entry = sr::parse_compute(&shader).expect("failed to parse");
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let x = unsafe {
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vulkano::pipeline::shader::ShaderModule::from_words(self.device.clone(), &shader.compute)
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}.unwrap();
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// Compile the shader and add it to a pipeline
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let pipeline = Arc::new({
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unsafe {
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ComputePipeline::new(self.device.clone(), &x.compute_entry_point(
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CStr::from_bytes_with_nul_unchecked(b"main\0"),
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vulkano_entry.compute_layout), &(),
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).unwrap()
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}
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});
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}
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pub fn load_buffers(&mut self) {
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self.img = Option::Some(image::open("resources/images/funky-bird.jpg").unwrap());
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let xy = self.img.dimensions();
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let data_length = xy.0 * xy.1 * 4;
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let pixel_count = self.img.raw_pixels().len();
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println!("Pixel count {}", pixel_count);
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if pixel_count != data_length as usize {
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println!("Creating apha channel...");
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for i in self.img.raw_pixels().iter() {
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if (self.image_buffer.len() + 1) % 4 == 0 {
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self.image_buffer.push(255);
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}
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self.image_buffer.push(*i);
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}
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self.image_buffer.push(255);
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} else {
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self.image_buffer = self.img.raw_pixels();
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}
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println!("Buffer length {}", self.image_buffer.len());
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println!("Size {:?}", xy);
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println!("Allocating Buffers...");
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{
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// Pull out the image data and place it in a buffer for the kernel to write to and for us to read from
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let write_buffer = {
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let mut buff = image_buffer.iter();
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let data_iter = (0..data_length).map(|n| *(buff.next().unwrap()));
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CpuAccessibleBuffer::from_iter(device.clone(), BufferUsage::all(), data_iter).unwrap()
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};
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// Pull out the image data and place it in a buffer for the kernel to read from
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let read_buffer = {
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let mut buff = image_buffer.iter();
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let data_iter = (0..data_length).map(|n| *(buff.next().unwrap()));
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CpuAccessibleBuffer::from_iter(device.clone(), BufferUsage::all(), data_iter).unwrap()
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};
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// A buffer to hold many i32 values to use as settings
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let settings_buffer = {
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let vec = vec![xy.0, xy.1];
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let mut buff = vec.iter();
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let data_iter = (0..2).map(|n| *(buff.next().unwrap()));
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CpuAccessibleBuffer::from_iter(device.clone(), BufferUsage::all(), data_iter).unwrap()
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};
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}
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println!("Done");
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// Create the data descriptor set for our previously created shader pipeline
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let mut set = PersistentDescriptorSet::start(pipeline.clone(), 0)
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.add_buffer(write_buffer.clone()).unwrap()
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.add_buffer(read_buffer.clone()).unwrap()
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.add_buffer(settings_buffer.clone()).unwrap();
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let mut set = Arc::new(set.build().unwrap());
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}
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pub fn run_kernel(&mut self) {
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println!("Running Kernel...");
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// The command buffer I think pretty much serves to define what runs where for how many times
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let command_buffer = AutoCommandBufferBuilder::primary_one_time_submit(device.clone(), queue.family()).unwrap()
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.dispatch([xy.0, xy.1, 1], pipeline.clone(), set.clone(), ()).unwrap()
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.build().unwrap();
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// Create a future for running the command buffer and then just fence it
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let future = sync::now(device.clone())
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.then_execute(queue.clone(), command_buffer).unwrap()
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.then_signal_fence_and_flush().unwrap();
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// I think this is redundant and returns immediately
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future.wait(None).unwrap();
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println!("Done running kernel");
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}
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pub fn read_image() -> Vec<u8> {
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// The buffer is sync'd so we can just read straight from the handle
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let mut data_buffer_content = write_buffer.read().unwrap();
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println!("Reading output");
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let mut image_buffer = Vec::new();
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for y in 0..xy.1 {
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for x in 0..xy.0 {
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let r = data_buffer_content[((xy.0 * y + x) * 4 + 0) as usize] as u8;
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let g = data_buffer_content[((xy.0 * y + x) * 4 + 1) as usize] as u8;
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let b = data_buffer_content[((xy.0 * y + x) * 4 + 2) as usize] as u8;
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let a = data_buffer_content[((xy.0 * y + x) * 4 + 3) as usize] as u8;
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image_buffer.push(r);
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image_buffer.push(g);
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image_buffer.push(b);
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image_buffer.push(a);
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img.put_pixel(x, y, image::Rgba([r, g, b, a]))
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}
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}
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image_buffer
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}
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pub fn save_image(&self) {
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println!("Saving output");
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img.save(format!("output/{}.png", SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs()));
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}
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}
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