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use crate::error;
use crate::handle::{Handle, Id};
use crate::Compiler;
use crate::string::CompilerStr;
use spirv_cross_sys as sys;
use spirv_cross_sys::{SpvId, TypeId, VariableId};
impl<T> Compiler<T> {
/// Gets the identifier (`OpName`) of an ID.
pub fn name<I: Id>(&self, handle: Handle<I>) -> error::Result<Option<CompilerStr<'_>>> {
let id = self.yield_id(handle)?;
unsafe {
let name = sys::spvc_compiler_get_name(self.ptr.as_ptr(), SpvId(id.id()));
let name = CompilerStr::from_ptr(name, self.ctx.drop_guard());
if name.is_empty() {
Ok(None)
} else {
Ok(Some(name))
}
}
}
/// Overrides the identifier OpName of an ID.
///
/// Identifiers beginning with underscores or identifiers which contain double underscores
/// are reserved by the implementation.
pub fn set_name<'str, I: Id>(
&mut self,
handle: Handle<I>,
string: impl Into<CompilerStr<'str>>,
) -> error::Result<()> {
let id = self.yield_id(handle)?;
let string = string.into();
unsafe {
let cstring = string.into_cstring_ptr()?;
sys::spvc_compiler_set_name(self.ptr.as_ptr(), SpvId(id.id()), cstring.as_ptr());
// Sanity drop to show that the lifetime of the cstring is only up until
// we have returned. AFAIK, SPIRV-Cross will do a string copy.
// If it does not, then we'll have to keep this string alive for a while.
drop(cstring);
Ok(())
}
}
/// Given a struct type ID, obtain the identifier for member number "index".
pub fn member_name(
&self,
struct_type: Handle<TypeId>,
index: u32,
) -> error::Result<Option<CompilerStr<'_>>> {
let struct_type_id = self.yield_id(struct_type)?;
unsafe {
let name = sys::spvc_compiler_get_member_name(self.ptr.as_ptr(), struct_type_id, index);
let name = CompilerStr::from_ptr(name, self.ctx.drop_guard());
if name.is_empty() {
Ok(None)
} else {
Ok(Some(name))
}
}
}
/// Sets the member identifier for the given struct member.
pub fn set_member_name<'str>(
&mut self,
struct_type: Handle<TypeId>,
index: u32,
string: impl Into<CompilerStr<'str>>,
) -> error::Result<()> {
let struct_type_id = self.yield_id(struct_type)?;
let string = string.into();
unsafe {
let cstring = string.into_cstring_ptr()?;
sys::spvc_compiler_set_member_name(
self.ptr.as_ptr(),
struct_type_id,
index,
cstring.as_ptr(),
);
// Sanity drop to show that the lifetime of the cstring is only up until
// we have returned. AFAIK, SPIRV-Cross will do a string copy.
// If it does not, then we'll have to keep this string alive for a while.
drop(cstring);
Ok(())
}
}
}
impl<T> Compiler<T> {
/// When declaring buffer blocks in GLSL, the name declared in the GLSL source
/// might not be the same as the name declared in the SPIR-V module due to naming conflicts.
/// In this case, SPIRV-Cross needs to find a fallback-name, and it might only
/// be possible to know this name after compiling to GLSL.
///
/// This is particularly important for HLSL input and UAVs which tends to reuse the same block type
/// for multiple distinct blocks. For these cases it is not possible to modify the name of the type itself
/// because it might be unique. Instead, you can use this interface to check after compilation which
/// name was actually used if your input SPIR-V tends to have this problem.
///
/// For other names like remapped names for variables, etc., it's generally enough to query the name of the variables
/// after compiling, block names are an exception to this rule.
/// `handle` should be a handle to a variable with a Block-like type.
///
/// This also applies to HLSL cbuffers.
pub fn remapped_declared_block_name(
&self,
handle: impl Into<Handle<VariableId>>,
) -> error::Result<Option<CompilerStr<'static>>> {
let handle = handle.into();
let handle = self.yield_id(handle)?;
unsafe {
let name =
sys::spvc_compiler_get_remapped_declared_block_name(self.ptr.as_ptr(), handle);
// SAFETY: 'ctx is sound here
// https://github.com/KhronosGroup/SPIRV-Cross/blob/main/spirv_cross_c.cpp#L2773
let name = CompilerStr::from_ptr(name, self.ctx.drop_guard());
if name.is_empty() {
Ok(None)
} else {
Ok(Some(name))
}
}
}
}