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//! The procedural macro for vulkano's shader system.
//! Manages the compile-time compilation of GLSL into SPIR-V and generation of assosciated rust code.
//!
//! # Basic usage
//!
//! ```
//! mod vs {
//! vulkano_shaders::shader!{
//! ty: "vertex",
//! src: "
//! #version 450
//!
//! layout(location = 0) in vec3 position;
//!
//! void main() {
//! gl_Position = vec4(position, 1.0);
//! }"
//! }
//! }
//! # fn main() {}
//! ```
//!
//! # Details
//!
//! If you want to take a look at what the macro generates, your best options
//! are to either read through the code that handles the generation (the
//! [`reflect`][reflect] function in the `vulkano-shaders` crate) or use a tool
//! such as [cargo-expand][cargo-expand] to view the expansion of the macro in your
//! own code. It is unfortunately not possible to provide a `generated_example`
//! module like some normal macro crates do since derive macros cannot be used from
//! the crate they are declared in. On the other hand, if you are looking for a
//! high-level overview, you can see the below section.
//!
//! # Generated code overview
//!
//! The macro generates the following items of interest:
//! * The `load` constructor. This method takes an `Arc<Device>`, calls
//! [`ShaderModule::new`][ShaderModule::new] with the passed-in device and the shader data provided
//! via the macro, and returns `Result<Arc<ShaderModule>, ShaderCreationError>`.
//! Before doing so, it loops through every capability instruction in the shader
//! data, verifying that the passed-in `Device` has the appropriate features
//! enabled.
//! * If the `shaders` option is used, then instead of one `load` constructor, there is one for each
//! shader. They are named based on the provided names, `load_first`, `load_second` etc.
//! * A Rust struct translated from each struct contained in the shader data.
//! By default each structure has a `Clone` and a `Copy` implementations. This
//! behavior could be customized through the `types_meta` macro option(see below
//! for details).
//! * The `SpecializationConstants` struct. This contains a field for every
//! specialization constant found in the shader data. Implementations of
//! `Default` and [`SpecializationConstants`][SpecializationConstants] are also
//! generated for the struct.
//!
//! All of these generated items will be accessed through the module when the macro was invoked.
//! If you wanted to store the `Shader` in a struct of your own, you could do something like this:
//!
//! ```
//! # fn main() {}
//! # use std::sync::Arc;
//! # use vulkano::shader::{ShaderCreationError, ShaderModule};
//! # use vulkano::device::Device;
//! #
//! # mod vs {
//! # vulkano_shaders::shader!{
//! # ty: "vertex",
//! # src: "
//! # #version 450
//! #
//! # layout(location = 0) in vec3 position;
//! #
//! # void main() {
//! # gl_Position = vec4(position, 1.0);
//! # }"
//! # }
//! # }
//! // various use statements
//! // `vertex_shader` module with shader derive
//!
//! pub struct Shaders {
//! pub vs: Arc<ShaderModule>,
//! }
//!
//! impl Shaders {
//! pub fn load(device: Arc<Device>) -> Result<Self, ShaderCreationError> {
//! Ok(Self {
//! vs: vs::load(device)?,
//! })
//! }
//! }
//! ```
//!
//! # Options
//!
//! The options available are in the form of the following attributes:
//!
//! ## `ty: "..."`
//!
//! This defines what shader type the given GLSL source will be compiled into.
//! The type can be any of the following:
//!
//! * `vertex`
//! * `fragment`
//! * `geometry`
//! * `tess_ctrl`
//! * `tess_eval`
//! * `compute`
//!
//! For details on what these shader types mean, [see Vulkano's documentation][pipeline].
//!
//! ## `src: "..."`
//!
//! Provides the raw GLSL source to be compiled in the form of a string. Cannot
//! be used in conjunction with the `path` or `bytes` field.
//!
//! ## `path: "..."`
//!
//! Provides the path to the GLSL source to be compiled, relative to `Cargo.toml`.
//! Cannot be used in conjunction with the `src` or `bytes` field.
//!
//! ## `bytes: "..."`
//!
//! Provides the path to precompiled SPIR-V bytecode, relative to `Cargo.toml`.
//! Cannot be used in conjunction with the `src` or `path` field.
//! This allows using shaders compiled through a separate build system.
//! **Note**: If your shader contains multiple entrypoints with different
//! descriptor sets, you may also need to enable `exact_entrypoint_interface`.
//!
//! ## `shaders: { First: {src: "...", ty: "..."}, ... }`
//!
//! With these options the user can compile several shaders at a single macro invocation.
//! Each entry key is a suffix that will be put after the name of the generated `load` function and
//! `SpecializationConstants` struct(`FirstSpecializationConstants` in this case). However all other
//! Rust structs translated from the shader source will be shared between shaders. The macro checks
//! that the source structs with the same names between different shaders have the same declaration
//! signature, and throws a compile-time error if they don't.
//!
//! Each entry values expecting `src`, `path`, `bytes`, and `ty` pairs same as above.
//!
//! Also `SpecializationConstants` can all be shared between shaders by specifying
//! `shared_constants: true,` entry-flag of the `shaders` map. This feature is turned-off by
//! default.
//!
//! ## `include: ["...", "...", ..., "..."]`
//!
//! Specifies the standard include directories to be searched through when using the
//! `#include <...>` directive within a shader source. Include directories can be absolute
//! or relative to `Cargo.toml`.
//! If `path` was specified, relative paths can also be used (`#include "..."`), without the need
//! to specify one or more standard include directories. Relative paths are relative to the
//! directory, which contains the source file the `#include "..."` directive is declared in.
//!
//! ## `define: [("NAME", "VALUE"), ...]`
//!
//! Adds the given macro definitions to the pre-processor. This is equivalent to passing `-DNAME=VALUE`
//! on the command line.
//!
//! ## `vulkan_version: "major.minor"` and `spirv_version: "major.minor"`
//!
//! Sets the Vulkan and SPIR-V versions to compile into, respectively. These map directly to the
//! [`set_target_env`](shaderc::CompileOptions::set_target_env) and
//! [`set_target_spirv`](shaderc::CompileOptions::set_target_spirv) compile options.
//! If neither option is specified, then SPIR-V 1.0 code targeting Vulkan 1.0 will be generated.
//!
//! The generated code must be supported by the device at runtime. If not, then an error will be
//! returned when calling `Shader::load`.
//!
//! ## `types_meta: { use a::b; #[derive(Clone, Default, PartialEq ...)] impl Eq }`
//!
//! Extends implementations of Rust structs that represent Shader structs.
//!
//! By default each generated struct has a `Clone` and a `Copy` implementations
//! only. If the struct has unsized members none of derives or impls applied on
//! this struct.
//!
//! The block may have as many `use`, `derive` or `impl` statements as needed
//! and in any order.
//!
//! Each `use` declaration will be added to generated `ty` module. And each
//! `derive`'s trait and `impl` statement will be applied to each generated
//! struct inside `ty` module.
//!
//! For `Default` derive implementation fills a struct data with all zeroes.
//! For `Display` and `Debug` derive implementation prints all fields except `_dummyX`.
//! For `PartialEq` derive implementation all non-`_dummyX` are checking for equality.
//!
//! The macro performs trivial checking for duplicate declarations. To see the
//! final output of generated code the user can also use `dump` macro
//! option(see below).
//!
//! ## `exact_entrypoint_interface: true`
//!
//! By default, the macro assumes that all resources (Uniforms, Storage Buffers,
//! Images, Samplers, etc) need to be bound into a descriptor set, even if they are
//! not used in the shader code. However, shaders with multiple entrypoints may have
//! conflicting descriptor sets for each entrypoint. Enabling this option will force
//! the macro to only generate descriptor information for resources that are used
//! in each entrypoint.
//!
//! The macro determines which resources are used by looking at each entrypoint's
//! interface and bytecode. See [`src/descriptor_sets.rs`][descriptor_sets]
//! for the exact logic.
//!
//! ## `dump: true`
//!
//! The crate fails to compile but prints the generated rust code to stdout.
//!
//! [reflect]: https://github.com/vulkano-rs/vulkano/blob/master/vulkano-shaders/src/lib.rs#L67
//! [cargo-expand]: https://github.com/dtolnay/cargo-expand
//! [ShaderModule::new]: https://docs.rs/vulkano/*/vulkano/pipeline/shader/struct.ShaderModule.html#method.new
//! [OomError]: https://docs.rs/vulkano/*/vulkano/enum.OomError.html
//! [pipeline::shader]: https://docs.rs/vulkano/*/vulkano/pipeline/shader/index.html
//! [descriptor]: https://docs.rs/vulkano/*/vulkano/descriptor/index.html
//! [ShaderStages]: https://docs.rs/vulkano/*/vulkano/descriptor/descriptor/struct.ShaderStages.html
//! [SpecializationConstants]: https://docs.rs/vulkano/*/vulkano/pipeline/shader/trait.SpecializationConstants.html
//! [pipeline]: https://docs.rs/vulkano/*/vulkano/pipeline/index.html
//! [descriptor_sets]: https://github.com/vulkano-rs/vulkano/blob/master/vulkano-shaders/src/descriptor_sets.rs#L142
#![doc(html_logo_url = "https://raw.githubusercontent.com/vulkano-rs/vulkano/master/logo.png")]
#![recursion_limit = "1024"]
#[macro_use]
extern crate quote;
#[macro_use]
extern crate syn;
extern crate proc_macro;
use crate::codegen::ShaderKind;
use shaderc::{EnvVersion, SpirvVersion};
use std::borrow::Cow;
use std::collections::HashMap;
use std::fs;
use std::fs::File;
use std::io::{Read, Result as IoResult};
use std::path::Path;
use std::slice::from_raw_parts;
use std::{env, iter::empty};
use syn::parse::{Parse, ParseStream, Result};
use syn::{
Ident, ItemUse, LitBool, LitStr, Meta, MetaList, NestedMeta, Path as SynPath, TypeImplTrait,
};
mod codegen;
mod entry_point;
mod structs;
enum SourceKind {
Src(String),
Path(String),
Bytes(String),
}
struct TypesMeta {
custom_derives: Vec<SynPath>,
clone: bool,
copy: bool,
display: bool,
debug: bool,
default: bool,
partial_eq: bool,
uses: Vec<ItemUse>,
impls: Vec<TypeImplTrait>,
}
impl Default for TypesMeta {
#[inline]
fn default() -> Self {
Self {
custom_derives: vec![],
clone: true,
copy: true,
partial_eq: false,
debug: false,
display: false,
default: false,
uses: Vec::new(),
impls: Vec::new(),
}
}
}
impl TypesMeta {
#[inline]
fn empty() -> Self {
Self {
custom_derives: Vec::new(),
clone: false,
copy: false,
partial_eq: false,
debug: false,
display: false,
default: false,
uses: Vec::new(),
impls: Vec::new(),
}
}
}
struct RegisteredType {
shader: String,
signature: Vec<(String, Cow<'static, str>)>,
}
impl RegisteredType {
#[inline]
fn assert_signatures(&self, type_name: &str, target_type: &Self) {
if self.signature.len() > target_type.signature.len() {
panic!(
"Shaders {shader_a:} and {shader_b:} declare structs with the \
same name \"`{type_name:}\", but the struct from {shader_a:} shader \
contains extra field \"{field:}\"",
shader_a = self.shader,
shader_b = target_type.shader,
type_name = type_name,
field = self.signature[target_type.signature.len()].0
);
}
if self.signature.len() < target_type.signature.len() {
panic!(
"Shaders {shader_a:} and {shader_b:} declare structs with the \
same name \"{type_name:}\", but the struct from {shader_b:} shader \
contains extra field \"{field:}\"",
shader_a = self.shader,
shader_b = target_type.shader,
type_name = type_name,
field = target_type.signature[self.signature.len()].0
);
}
let comparison = self
.signature
.iter()
.zip(target_type.signature.iter())
.enumerate();
for (index, ((a_name, a_type), (b_name, b_type))) in comparison {
if a_name != b_name || a_type != b_type {
panic!(
"Shaders {shader_a:} and {shader_b:} declare structs with the \
same name \"{type_name:}\", but the struct from {shader_a:} shader \
contains field \"{a_name:}\" of type \"{a_type:}\" in position {index:}, \
whereas the same struct from {shader_b:} contains field \"{b_name:}\" \
of type \"{b_type:}\" in the same position",
shader_a = self.shader,
shader_b = target_type.shader,
type_name = type_name,
index = index,
a_name = a_name,
a_type = a_type,
b_name = b_name,
b_type = b_type,
);
}
}
}
}
struct MacroInput {
dump: bool,
include_directories: Vec<String>,
macro_defines: Vec<(String, String)>,
shared_constants: bool,
shaders: HashMap<String, (ShaderKind, SourceKind)>,
spirv_version: Option<SpirvVersion>,
types_meta: TypesMeta,
vulkan_version: Option<EnvVersion>,
}
impl Parse for MacroInput {
fn parse(input: ParseStream) -> Result<Self> {
let mut dump = None;
let mut exact_entrypoint_interface = None;
let mut include_directories = Vec::new();
let mut macro_defines = Vec::new();
let mut shared_constants = None;
let mut shaders = HashMap::new();
let mut spirv_version = None;
let mut types_meta = None;
let mut vulkan_version = None;
fn parse_shader_fields<'k>(
output: &mut (Option<ShaderKind>, Option<SourceKind>),
name: &'k str,
input: ParseStream,
) -> Result<()> {
match name {
"ty" => {
if output.0.is_some() {
panic!("Only one `ty` can be defined")
}
let ty: LitStr = input.parse()?;
let ty = match ty.value().as_ref() {
"vertex" => ShaderKind::Vertex,
"fragment" => ShaderKind::Fragment,
"geometry" => ShaderKind::Geometry,
"tess_ctrl" => ShaderKind::TessControl,
"tess_eval" => ShaderKind::TessEvaluation,
"compute" => ShaderKind::Compute,
"raygen" => ShaderKind::RayGeneration,
"anyhit" => ShaderKind::AnyHit,
"closesthit" => ShaderKind::ClosestHit,
"miss" => ShaderKind::Miss,
"intersection" => ShaderKind::Intersection,
"callable" => ShaderKind::Callable,
_ => panic!(concat!("Unexpected shader type, valid values: vertex, fragment, geometry, tess_ctrl, ",
"tess_eval, compute, raygen, anyhit, closesthit, miss, intersection, callable"))
};
output.0 = Some(ty);
}
"bytes" => {
if output.1.is_some() {
panic!(
"Only one of `src`, `path`, or `bytes` can be defined per Shader entry"
)
}
let path: LitStr = input.parse()?;
output.1 = Some(SourceKind::Bytes(path.value()));
}
"path" => {
if output.1.is_some() {
panic!(
"Only one of `src`, `path`, or `bytes` can be defined per Shader entry"
)
}
let path: LitStr = input.parse()?;
output.1 = Some(SourceKind::Path(path.value()));
}
"src" => {
if output.1.is_some() {
panic!("Only one of `src`, `path`, `bytes` can be defined per Shader entry")
}
let src: LitStr = input.parse()?;
output.1 = Some(SourceKind::Src(src.value()));
}
other => unreachable!("Unexpected entry key {:?}", other),
}
Ok(())
}
while !input.is_empty() {
let name: Ident = input.parse()?;
input.parse::<Token![:]>()?;
let name = name.to_string();
match name.as_str() {
"bytes" | "src" | "path" | "ty" => {
if shaders.len() > 1 || (shaders.len() == 1 && !shaders.contains_key("")) {
panic!("Only one of `shaders`, `src`, `path`, or `bytes` can be defined");
}
parse_shader_fields(
shaders
.entry("".to_string())
.or_insert_with(Default::default),
name.as_str(),
input,
)?;
}
"shaders" => {
if !shaders.is_empty() {
panic!("Only one of `shaders`, `src`, `path`, or `bytes` can be defined");
}
let in_braces;
braced!(in_braces in input);
while !in_braces.is_empty() {
let prefix: Ident = in_braces.parse()?;
let prefix = prefix.to_string();
if prefix.to_string().as_str() == "shared_constants" {
in_braces.parse::<Token![:]>()?;
if shared_constants.is_some() {
panic!("Only one `shared_constants` can be defined")
}
let independent_constants_lit: LitBool = in_braces.parse()?;
shared_constants = Some(independent_constants_lit.value);
if !in_braces.is_empty() {
in_braces.parse::<Token![,]>()?;
}
continue;
}
if shaders.contains_key(&prefix) {
panic!("Shader entry {:?} already defined", prefix);
}
in_braces.parse::<Token![:]>()?;
let in_shader_definition;
braced!(in_shader_definition in in_braces);
while !in_shader_definition.is_empty() {
let name: Ident = in_shader_definition.parse()?;
in_shader_definition.parse::<Token![:]>()?;
let name = name.to_string();
match name.as_ref() {
"bytes" | "src" | "path" | "ty" => {
parse_shader_fields(
shaders
.entry(prefix.clone())
.or_insert_with(Default::default),
name.as_str(),
&in_shader_definition,
)?;
}
name => panic!("Unknown Shader definition field {:?}", name),
}
if !in_shader_definition.is_empty() {
in_shader_definition.parse::<Token![,]>()?;
}
}
if !in_braces.is_empty() {
in_braces.parse::<Token![,]>()?;
}
match shaders.get(&prefix).unwrap() {
(None, _) => panic!("Please specify shader's {} type e.g. `ty: \"vertex\"`", prefix),
(_, None) => panic!("Please specify shader's {} source e.g. `path: \"entry_point.glsl\"`", prefix),
_ => ()
}
}
if shaders.is_empty() {
panic!("At least one Shader entry must be defined");
}
}
"define" => {
let array_input;
bracketed!(array_input in input);
while !array_input.is_empty() {
let tuple_input;
parenthesized!(tuple_input in array_input);
let name: LitStr = tuple_input.parse()?;
tuple_input.parse::<Token![,]>()?;
let value: LitStr = tuple_input.parse()?;
macro_defines.push((name.value(), value.value()));
if !array_input.is_empty() {
array_input.parse::<Token![,]>()?;
}
}
}
"dump" => {
if dump.is_some() {
panic!("Only one `dump` can be defined")
}
let dump_lit: LitBool = input.parse()?;
dump = Some(dump_lit.value);
}
"exact_entrypoint_interface" => {
if exact_entrypoint_interface.is_some() {
panic!("Only one `dump` can be defined")
}
let lit: LitBool = input.parse()?;
exact_entrypoint_interface = Some(lit.value);
}
"include" => {
let in_brackets;
bracketed!(in_brackets in input);
while !in_brackets.is_empty() {
let path: LitStr = in_brackets.parse()?;
include_directories.push(path.value());
if !in_brackets.is_empty() {
in_brackets.parse::<Token![,]>()?;
}
}
}
"spirv_version" => {
let version: LitStr = input.parse()?;
spirv_version = Some(match version.value().as_ref() {
"1.0" => SpirvVersion::V1_0,
"1.1" => SpirvVersion::V1_1,
"1.2" => SpirvVersion::V1_2,
"1.3" => SpirvVersion::V1_3,
"1.4" => SpirvVersion::V1_4,
"1.5" => SpirvVersion::V1_5,
"1.6" => SpirvVersion::V1_6,
_ => panic!("Unknown SPIR-V version: {}", version.value()),
});
}
"types_meta" => {
let in_braces;
braced!(in_braces in input);
let mut meta = TypesMeta::empty();
while !in_braces.is_empty() {
if in_braces.peek(Token![#]) {
in_braces.parse::<Token![#]>()?;
let in_brackets;
bracketed!(in_brackets in in_braces);
let derive_list: MetaList = in_brackets.parse()?;
for derive in derive_list.nested {
match derive {
NestedMeta::Meta(Meta::Path(path)) => {
let custom_derive = if let Some(derive_ident) =
path.get_ident()
{
match derive_ident.to_string().as_str() {
"Clone" => {
if meta.default {
return Err(in_brackets
.error("Duplicate Clone derive"));
}
meta.clone = true;
false
}
"Copy" => {
if meta.copy {
return Err(in_brackets
.error("Duplicate Copy derive"));
}
meta.copy = true;
false
}
"PartialEq" => {
if meta.partial_eq {
return Err(in_brackets
.error("Duplicate PartialEq derive"));
}
meta.partial_eq = true;
false
}
"Debug" => {
if meta.debug {
return Err(in_brackets
.error("Duplicate Debug derive"));
}
meta.debug = true;
false
}
"Display" => {
if meta.display {
return Err(in_brackets
.error("Duplicate Display derive"));
}
meta.display = true;
false
}
"Default" => {
if meta.default {
return Err(in_brackets
.error("Duplicate Default derive"));
}
meta.default = true;
false
}
_ => true,
}
} else {
true
};
if custom_derive {
if meta
.custom_derives
.iter()
.any(|candidate| candidate.eq(&path))
{
return Err(
in_braces.error("Duplicate derive declaration")
);
}
meta.custom_derives.push(path);
}
}
_ => return Err(in_brackets.error("Unsupported syntax")),
}
}
continue;
}
if in_braces.peek(Token![impl]) {
let impl_trait: TypeImplTrait = in_braces.parse()?;
if meta.impls.iter().any(|candidate| candidate == &impl_trait) {
return Err(in_braces.error("Duplicate \"impl\" declaration"));
}
meta.impls.push(impl_trait);
continue;
}
if in_braces.peek(Token![use]) {
let item_use: ItemUse = in_braces.parse()?;
if meta.uses.iter().any(|candidate| candidate == &item_use) {
return Err(in_braces.error("Duplicate \"use\" declaration"));
}
meta.uses.push(item_use);
continue;
}
return Err(in_braces.error("Type meta must by \"use a::b::c\", \"#[derive(Type1, Type2, ..)]\" or \"impl Type\""));
}
types_meta = Some(meta);
}
"vulkan_version" => {
let version: LitStr = input.parse()?;
vulkan_version = Some(match version.value().as_ref() {
"1.0" => EnvVersion::Vulkan1_0,
"1.1" => EnvVersion::Vulkan1_1,
"1.2" => EnvVersion::Vulkan1_2,
_ => panic!("Unknown Vulkan version: {}", version.value()),
});
}
name => panic!("Unknown field {:?}", name),
}
if !input.is_empty() {
input.parse::<Token![,]>()?;
}
}
if shaders.is_empty() {
panic!("Please specify at least one shader e.g. `ty: \"vertex\", src: \"glsl source code\"`");
}
match shaders.get("") {
Some((None, _)) => panic!("Please specify shader's type e.g. `ty: \"vertex\"`"),
Some((_, None)) => {
panic!("Please specify shader's source e.g. `src: \"glsl source code\"`")
}
_ => (),
}
Ok(Self {
dump: dump.unwrap_or(false),
include_directories,
macro_defines,
shared_constants: shared_constants.unwrap_or(false),
shaders: shaders
.into_iter()
.map(|(key, (shader_kind, shader_source))| {
(key, (shader_kind.unwrap(), shader_source.unwrap()))
})
.collect(),
spirv_version,
types_meta: types_meta.unwrap_or_default(),
vulkan_version,
})
}
}
pub(self) fn read_file_to_string(full_path: &Path) -> IoResult<String> {
let mut buf = String::new();
File::open(full_path).and_then(|mut file| file.read_to_string(&mut buf))?;
Ok(buf)
}
#[proc_macro]
pub fn shader(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
let input = parse_macro_input!(input as MacroInput);
let is_single = input.shaders.len() == 1;
let root = env::var("CARGO_MANIFEST_DIR").unwrap_or_else(|_| ".".into());
let root_path = Path::new(&root);
let mut shaders_code = Vec::with_capacity(input.shaders.len());
let mut types_code = Vec::with_capacity(input.shaders.len());
let mut types_registry = HashMap::new();
for (prefix, (shader_kind, shader_source)) in input.shaders {
let (code, types) = if let SourceKind::Bytes(path) = shader_source {
let full_path = root_path.join(&path);
let bytes = if full_path.is_file() {
fs::read(full_path)
.unwrap_or_else(|_| panic!("Error reading source from {:?}", path))
} else {
panic!(
"File {:?} was not found; note that the path must be relative to your Cargo.toml",
path
);
};
// The SPIR-V specification essentially guarantees that
// a shader will always be an integer number of words
assert_eq!(0, bytes.len() % 4);
codegen::reflect(
prefix.as_str(),
unsafe { from_raw_parts(bytes.as_slice().as_ptr() as *const u32, bytes.len() / 4) },
&input.types_meta,
empty(),
input.shared_constants,
&mut types_registry,
)
.unwrap()
} else {
let (path, full_path, source_code) = match shader_source {
SourceKind::Src(source) => (None, None, source),
SourceKind::Path(path) => {
let full_path = root_path.join(&path);
let source_code = read_file_to_string(&full_path)
.unwrap_or_else(|_| panic!("Error reading source from {:?}", path));
if full_path.is_file() {
(Some(path.clone()), Some(full_path), source_code)
} else {
panic!("File {:?} was not found; note that the path must be relative to your Cargo.toml", path);
}
}
SourceKind::Bytes(_) => unreachable!(),
};
let include_paths = input
.include_directories
.iter()
.map(|include_directory| {
let include_path = Path::new(include_directory);
let mut full_include_path = root_path.to_owned();
full_include_path.push(include_path);
full_include_path
})
.collect::<Vec<_>>();
let (content, includes) = match codegen::compile(
path,
&root_path,
&source_code,
shader_kind,
&include_paths,
&input.macro_defines,
input.vulkan_version,
input.spirv_version,
) {
Ok(ok) => ok,
Err(e) => {
if is_single {
panic!("{}", e.replace("(s): ", "(s):\n"))
} else {
panic!("Shader {:?} {}", prefix, e.replace("(s): ", "(s):\n"))
}
}
};
let input_paths = includes
.iter()
.map(|s| s.as_ref())
.chain(full_path.as_deref().map(codegen::path_to_str));
codegen::reflect(
prefix.as_str(),
content.as_binary(),
&input.types_meta,
input_paths,
input.shared_constants,
&mut types_registry,
)
.unwrap()
};
shaders_code.push(code);
types_code.push(types);
}
let uses = &input.types_meta.uses;
let result = quote! {
#(
#shaders_code
)*
pub mod ty {
#( #uses )*
#(
#types_code
)*
}
};
if input.dump {
println!("{}", result);
panic!("`shader!` rust codegen dumped") // TODO: use span from dump
}
proc_macro::TokenStream::from(result)
}