60 lines
2 KiB
Rust
60 lines
2 KiB
Rust
use {
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crate::open,
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anyhow::{anyhow, bail, Context},
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shaderc::{CompileOptions, ResolvedInclude},
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std::{io::Write, path::Path},
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};
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const ROOT: &str = "src/gfx_apis/vulkan/shaders";
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pub fn main() -> anyhow::Result<()> {
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println!("cargo:rerun-if-changed={}", ROOT);
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compile_simple("fill.frag")?;
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compile_simple("fill.vert")?;
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compile_simple("tex.vert")?;
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compile_tex_frag("tex.frag.spv", false)?;
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compile_tex_frag("tex.frag.mult.spv", true)?;
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Ok(())
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}
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fn compile_tex_frag(out: &str, alpha_multiplier: bool) -> anyhow::Result<()> {
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let mut opts = CompileOptions::new().unwrap();
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if alpha_multiplier {
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opts.add_macro_definition("ALPHA_MULTIPLIER", None);
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}
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compile_shader("tex.frag", out, Some(opts)).with_context(|| out.to_string())?;
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Ok(())
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}
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fn compile_simple(name: &str) -> anyhow::Result<()> {
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compile_shader(name, &format!("{name}.spv"), None).with_context(|| name.to_string())
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}
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fn compile_shader(name: &str, out: &str, options: Option<CompileOptions>) -> anyhow::Result<()> {
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let read = |path: &str| std::fs::read_to_string(format!("{}/{}", ROOT, path));
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let mut options = options.unwrap_or_else(|| CompileOptions::new().unwrap());
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options.set_include_callback(|name, _, _, _| {
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Ok(ResolvedInclude {
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resolved_name: name.to_string(),
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content: read(name).map_err(|e| anyhow!(e).to_string())?,
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})
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});
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let stage = match Path::new(name)
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.extension()
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.and_then(|e| e.to_str())
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.unwrap_or("")
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{
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"frag" => shaderc::ShaderKind::Fragment,
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"vert" => shaderc::ShaderKind::Vertex,
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n => bail!("Unknown shader stage {}", n),
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};
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let src = read(name)?;
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let compiler = shaderc::Compiler::new().unwrap();
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let binary = compiler
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.compile_into_spirv(&src, stage, name, "main", Some(&options))
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.unwrap();
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let mut file = open(out)?;
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file.write_all(binary.as_binary_u8())?;
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file.flush()?;
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Ok(())
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}
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