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

//! This module defines the ShadeModule abstraction which makes it easy to
//! create vulkan shader modules directly with the rust `include_bytes` macro.

use crate::graphics::vulkan::{ffi, Device};

use anyhow::{Context, Result};
use ash::{version::DeviceV1_0, vk};
use std::sync::Arc;

/// A wrapper for the vulkan shader module handle which destroys the module
/// when dropped.
pub struct ShaderModule {
    pub shader_module: vk::ShaderModule,
    device: Arc<Device>,
}

impl ShaderModule {
    /// Create a new shader module using the provided source.
    ///
    /// Panics if the source array is not divisible evenly into u32 words.
    pub fn new<Name>(
        device: &Arc<Device>,
        name: Name,
        source: &'static [u8],
    ) -> Result<Self>
    where
        Name: Into<String>,
    {
        let source_u32 = ffi::copy_to_u32(source);
        let create_info = vk::ShaderModuleCreateInfo {
            p_code: source_u32.as_ptr(),
            code_size: source_u32.len() * std::mem::size_of::<u32>(),
            ..Default::default()
        };

        let shader_module = unsafe {
            device
                .logical_device
                .create_shader_module(&create_info, None)
                .context("unable to create shader module")?
        };

        device.name_vulkan_object(
            name,
            vk::ObjectType::SHADER_MODULE,
            &shader_module,
        )?;

        Ok(Self {
            shader_module,
            device: device.clone(),
        })
    }
}

impl Drop for ShaderModule {
    fn drop(&mut self) {
        unsafe {
            self.device
                .logical_device
                .destroy_shader_module(self.shader_module, None);
        }
    }
}