librashader_reflect/front/
glslang.rs

1use crate::error::ShaderCompileError;
2use glslang::{CompilerOptions, ShaderInput, ShaderMessage};
3use librashader_preprocess::ShaderSource;
4use rspirv::binary::Assemble;
5use rspirv::dr::Builder;
6
7use crate::front::spirv_passes::{link_input_outputs, load_module};
8use crate::front::{ShaderInputCompiler, SpirvCompilation};
9
10/// glslang compiler
11pub struct Glslang;
12
13impl ShaderInputCompiler<SpirvCompilation> for Glslang {
14    fn compile(source: &ShaderSource) -> Result<SpirvCompilation, ShaderCompileError> {
15        compile_spirv(source)
16    }
17}
18
19pub(crate) fn compile_spirv(source: &ShaderSource) -> Result<SpirvCompilation, ShaderCompileError> {
20    let compiler = glslang::Compiler::acquire().ok_or(ShaderCompileError::CompilerInitError)?;
21    let options = CompilerOptions {
22        source_language: glslang::SourceLanguage::GLSL,
23        target: glslang::Target::Vulkan {
24            version: glslang::VulkanVersion::Vulkan1_0,
25            spirv_version: glslang::SpirvVersion::SPIRV1_0,
26        },
27        version_profile: None,
28        messages: ShaderMessage::DEFAULT,
29    };
30
31    let vertex = glslang::ShaderSource::from(source.vertex.as_str());
32    let vertex = ShaderInput::new(&vertex, glslang::ShaderStage::Vertex, &options, None, None)?;
33    let vertex = compiler.create_shader(vertex)?;
34
35    let fragment = glslang::ShaderSource::from(source.fragment.as_str());
36    let fragment = ShaderInput::new(
37        &fragment,
38        glslang::ShaderStage::Fragment,
39        &options,
40        None,
41        None,
42    )?;
43    let fragment = compiler.create_shader(fragment)?;
44
45    let vertex = vertex.compile()?;
46    let fragment = fragment.compile()?;
47
48    let vertex = load_module(&vertex);
49    let fragment = load_module(&fragment);
50    let mut fragment = Builder::new_from_module(fragment);
51    let mut vertex = Builder::new_from_module(vertex);
52
53    let mut pass = link_input_outputs::LinkInputs::new(&mut vertex, &mut fragment, false);
54    pass.do_pass();
55
56    let vertex = vertex.module().assemble();
57    let fragment = fragment.module().assemble();
58
59    Ok(SpirvCompilation { vertex, fragment })
60}
61
62#[cfg(test)]
63mod test {
64    use crate::front::glslang::compile_spirv;
65    use librashader_preprocess::ShaderSource;
66    #[test]
67    pub fn compile_shader() {
68        let result = ShaderSource::load("../test/basic.slang").unwrap();
69        let _spirv = compile_spirv(&result).unwrap();
70    }
71}
librashader_reflect/front/glslang.rs

librashader_reflect/front/
glslang.rs
