1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161

use vulkano::device::{Device};
use vulkano::pipeline::{ComputePipeline};
use std::sync::Arc;
use std::ffi::CStr;
use std::path::PathBuf;
use shade_runner as sr;
use vulkano::descriptor::pipeline_layout::PipelineLayout;
use shade_runner::{CompileError, Layout, Input, Output, CompiledShaders, Entry, CompiledShader};
use shaderc::CompileOptions;
use vulkano::pipeline::shader::{ShaderModule, GraphicsEntryPoint, SpecializationConstants, SpecializationMapEntry};
use crate::compute::managed::handles::CompuKernelHandle;


#[derive(Clone)]
pub struct CompuKernel {

    handle: Arc<CompuKernelHandle>,

    compute_pipeline: Option<std::sync::Arc<ComputePipeline<PipelineLayout<Layout>>>>,
    compute_kernel_path: PathBuf,

    name: String,

    shader: CompiledShader,
    entry: Entry,
    shader_module: Arc<ShaderModule>,
    device: Arc<Device>,
    specialization_constants: ComputeSpecializationConstants,
}

impl CompuKernel {

    fn get_path(filename: String) -> PathBuf {

        let project_root =
            std::env::current_dir()
                .expect("failed to get root directory");

        let mut compute_path = project_root.clone();
        compute_path.push(PathBuf::from("resources/shaders/"));
        compute_path.push(PathBuf::from(filename));

        compute_path
    }

    pub fn new(filename: String, device: Arc<Device>,
               handle: Arc<CompuKernelHandle>) -> CompuKernel {

        let compute_path = CompuKernel::get_path(filename.clone());

        let mut options  = CompileOptions::new().ok_or(CompileError::CreateCompiler).unwrap();

        let shader = sr::load_compute_with_options(compute_path.clone(), options)
            .expect("Failed to compile");

        let entry = sr::parse_compute(&shader)
            .expect("Failed to parse");

        let shader_module = unsafe {
            vulkano::pipeline::shader::ShaderModule::from_words(device.clone(), &shader.spriv)
        }.unwrap();


        CompuKernel {
            name: filename,
            handle: handle,
            device: device,
            shader: shader,
            compute_pipeline: Option::None,
            compute_kernel_path: compute_path,
            entry: entry,
            shader_module: shader_module,
            specialization_constants: ComputeSpecializationConstants {
                first_constant: 0,
                second_constant: 0,
                third_constant: 0.0
            }
        }
    }

    pub fn get_pipeline(&mut self) -> std::sync::Arc<ComputePipeline<PipelineLayout<Layout>>> {

        match self.compute_pipeline.clone() {
            Some(t) => t,
            None => {
                self.compute_pipeline = Some(Arc::new({
                    unsafe {
                        ComputePipeline::new(self.device.clone(), &self.shader_module.compute_entry_point(
                            CStr::from_bytes_with_nul_unchecked(b"main\0"),
                            self.entry.layout.clone()), &self.specialization_constants,
                        ).unwrap()
                    }
                }));
                self.compute_pipeline.clone().unwrap()
            }
        }
    }

    pub fn recompile_kernel(&mut self) -> std::sync::Arc<ComputePipeline<PipelineLayout<shade_runner::layouts::Layout>>>  {
        self.compile_kernel(String::from(self.compute_kernel_path.clone().to_str().unwrap()))
    }

    pub fn compile_kernel(&mut self, filename: String) -> std::sync::Arc<ComputePipeline<PipelineLayout<Layout>>> {

        let mut options = CompileOptions::new().ok_or(CompileError::CreateCompiler).unwrap();
        self.compute_kernel_path = CompuKernel::get_path(filename);

        self.shader =
            sr::load_compute_with_options(self.compute_kernel_path.clone(), options)
                .expect("Failed to compile");

        self.entry =
            sr::parse_compute(&self.shader)
                .expect("Failed to parse");

        self.shader_module = unsafe {
            vulkano::pipeline::shader::ShaderModule::from_words(self.device.clone(), &self.shader.spriv)
        }.unwrap();

        self.get_pipeline()
    }

    pub fn get_handle(&self) -> Arc<CompuKernelHandle> {
        self.handle.clone()
    }
    pub fn get_name(&self) -> String {
        self.name.clone()
    }
}

#[repr(C)]
#[derive(Default, Debug, Clone)]
pub struct ComputeSpecializationConstants {
    first_constant: i32,
    second_constant: u32,
    third_constant: f32,
}

unsafe impl SpecializationConstants for ComputeSpecializationConstants {
    fn descriptors() -> &'static [SpecializationMapEntry] {
        static DESCRIPTORS: [SpecializationMapEntry; 3] = [
            SpecializationMapEntry {
                constant_id: 0,
                offset: 0,
                size: 4,
            },
            SpecializationMapEntry {
                constant_id: 1,
                offset: 4,
                size: 4,
            },
            SpecializationMapEntry {
                constant_id: 2,
                offset: 8,
                size: 4,
            },
        ];

        &DESCRIPTORS
    }
}