Can this emit HLSL?

[star69rem]

Since I can't get the API working, is it possible to just emit the D3D11 HLSL for a given shader?

[chyyran]

You'll need to use the Rust API for that functionality, it isn't exposed in the C headers.

#![feature(type_alias_impl_trait)]

use std::error::Error;
use librashader::preprocess::ShaderSource;
use librashader::presets::ShaderPreset;
use librashader::reflect::{CompileReflectShader, FromCompilation, CompilePresetTarget, ShaderPassArtifact};
use librashader::reflect::targets::HLSL;
use librashader::reflect::cross::GlslangCompilation;
use librashader::reflect::semantics::ShaderSemantics;
type Artifact = impl CompileReflectShader<HLSL, GlslangCompilation>;
type ShaderPassMeta = ShaderPassArtifact<Artifact>;

// Compile single shader
pub fn compile_hlsl(
        source: &ShaderSource,
    ) -> Result<(String, String)>
{
    let artifact = GlslangCompilation::compile(&source)?;
    let (_, _, compiler) = HLSL::from_compilation(artifact)?;
    let hlsl = compiler.compile(None)?;

    Ok((hlsl.vertex, hlsl.fragment))
}

Otherwise there are command-line tools to go from Vulkan GLSL to SPIR-V to HLSL. You can just use SPIRV-Cross directly.

[chyyran]

Much belated update but librashader-cli provides this functionality now.

$ librashader-cli transpile -s crt-geom.slang -o fragment -f hlsl -v 51