use super::{
helpers::{contains_builtin, global_needs_wrapper, map_storage_class},
make_local, Block, BlockContext, CachedExpressions, EntryPointContext, Error, Function,
FunctionArgument, GlobalVariable, IdGenerator, Instruction, LocalType, LocalVariable,
LogicalLayout, LookupFunctionType, LookupType, LoopContext, Options, PhysicalLayout,
PipelineOptions, ResultMember, Writer, WriterFlags, BITS_PER_BYTE,
};
use crate::{
arena::{Handle, UniqueArena},
back::spv::BindingInfo,
proc::{Alignment, TypeResolution},
valid::{FunctionInfo, ModuleInfo},
};
use spirv::Word;
use std::collections::hash_map::Entry;
struct FunctionInterface<'a> {
varying_ids: &'a mut Vec<Word>,
stage: crate::ShaderStage,
}
impl Function {
fn to_words(&self, sink: &mut impl Extend<Word>) {
self.signature.as_ref().unwrap().to_words(sink);
for argument in self.parameters.iter() {
argument.instruction.to_words(sink);
}
for (index, block) in self.blocks.iter().enumerate() {
Instruction::label(block.label_id).to_words(sink);
if index == 0 {
for local_var in self.variables.values() {
local_var.instruction.to_words(sink);
}
}
for instruction in block.body.iter() {
instruction.to_words(sink);
}
}
}
}
impl Writer {
pub fn new(options: &Options) -> Result<Self, Error> {
let (major, minor) = options.lang_version;
if major != 1 {
return Err(Error::UnsupportedVersion(major, minor));
}
let raw_version = ((major as u32) << 16) | ((minor as u32) << 8);
let mut capabilities_used = crate::FastHashSet::default();
capabilities_used.insert(spirv::Capability::Shader);
let mut id_gen = IdGenerator::default();
let gl450_ext_inst_id = id_gen.next();
let void_type = id_gen.next();
Ok(Writer {
physical_layout: PhysicalLayout::new(raw_version),
logical_layout: LogicalLayout::default(),
id_gen,
capabilities_available: options.capabilities.clone(),
capabilities_used,
extensions_used: crate::FastHashSet::default(),
debugs: vec![],
annotations: vec![],
flags: options.flags,
bounds_check_policies: options.bounds_check_policies,
zero_initialize_workgroup_memory: options.zero_initialize_workgroup_memory,
void_type,
lookup_type: crate::FastHashMap::default(),
lookup_function: crate::FastHashMap::default(),
lookup_function_type: crate::FastHashMap::default(),
constant_ids: Vec::new(),
cached_constants: crate::FastHashMap::default(),
global_variables: Vec::new(),
binding_map: options.binding_map.clone(),
saved_cached: CachedExpressions::default(),
gl450_ext_inst_id,
temp_list: Vec::new(),
})
}
fn reset(&mut self) {
use super::recyclable::Recyclable;
use std::mem::take;
let mut id_gen = IdGenerator::default();
let gl450_ext_inst_id = id_gen.next();
let void_type = id_gen.next();
let fresh = Writer {
flags: self.flags,
bounds_check_policies: self.bounds_check_policies,
zero_initialize_workgroup_memory: self.zero_initialize_workgroup_memory,
capabilities_available: take(&mut self.capabilities_available),
binding_map: take(&mut self.binding_map),
id_gen,
void_type,
gl450_ext_inst_id,
capabilities_used: take(&mut self.capabilities_used).recycle(),
extensions_used: take(&mut self.extensions_used).recycle(),
physical_layout: self.physical_layout.clone().recycle(),
logical_layout: take(&mut self.logical_layout).recycle(),
debugs: take(&mut self.debugs).recycle(),
annotations: take(&mut self.annotations).recycle(),
lookup_type: take(&mut self.lookup_type).recycle(),
lookup_function: take(&mut self.lookup_function).recycle(),
lookup_function_type: take(&mut self.lookup_function_type).recycle(),
constant_ids: take(&mut self.constant_ids).recycle(),
cached_constants: take(&mut self.cached_constants).recycle(),
global_variables: take(&mut self.global_variables).recycle(),
saved_cached: take(&mut self.saved_cached).recycle(),
temp_list: take(&mut self.temp_list).recycle(),
};
*self = fresh;
self.capabilities_used.insert(spirv::Capability::Shader);
}
pub(super) fn require_any(
&mut self,
what: &'static str,
capabilities: &[spirv::Capability],
) -> Result<(), Error> {
match *capabilities {
[] => Ok(()),
[first, ..] => {
let selected = match self.capabilities_available {
None => first,
Some(ref available) => {
match capabilities.iter().find(|cap| available.contains(cap)) {
Some(&cap) => cap,
None => {
return Err(Error::MissingCapabilities(what, capabilities.to_vec()))
}
}
}
};
self.capabilities_used.insert(selected);
Ok(())
}
}
}
pub(super) fn use_extension(&mut self, extension: &'static str) {
self.extensions_used.insert(extension);
}
pub(super) fn get_type_id(&mut self, lookup_ty: LookupType) -> Word {
match self.lookup_type.entry(lookup_ty) {
Entry::Occupied(e) => *e.get(),
Entry::Vacant(e) => {
let local = match lookup_ty {
LookupType::Handle(_handle) => unreachable!("Handles are populated at start"),
LookupType::Local(local) => local,
};
let id = self.id_gen.next();
e.insert(id);
self.write_type_declaration_local(id, local);
id
}
}
}
pub(super) fn get_expression_type_id(&mut self, tr: &TypeResolution) -> Word {
let lookup_ty = match *tr {
TypeResolution::Handle(ty_handle) => LookupType::Handle(ty_handle),
TypeResolution::Value(ref inner) => LookupType::Local(make_local(inner).unwrap()),
};
self.get_type_id(lookup_ty)
}
pub(super) fn get_pointer_id(
&mut self,
arena: &UniqueArena<crate::Type>,
handle: Handle<crate::Type>,
class: spirv::StorageClass,
) -> Result<Word, Error> {
let ty_id = self.get_type_id(LookupType::Handle(handle));
if let crate::TypeInner::Pointer { .. } = arena[handle].inner {
return Ok(ty_id);
}
let lookup_type = LookupType::Local(LocalType::Pointer {
base: handle,
class,
});
Ok(if let Some(&id) = self.lookup_type.get(&lookup_type) {
id
} else {
let id = self.id_gen.next();
let instruction = Instruction::type_pointer(id, class, ty_id);
instruction.to_words(&mut self.logical_layout.declarations);
self.lookup_type.insert(lookup_type, id);
id
})
}
pub(super) fn get_uint_type_id(&mut self) -> Word {
let local_type = LocalType::Value {
vector_size: None,
kind: crate::ScalarKind::Uint,
width: 4,
pointer_space: None,
};
self.get_type_id(local_type.into())
}
pub(super) fn get_float_type_id(&mut self) -> Word {
let local_type = LocalType::Value {
vector_size: None,
kind: crate::ScalarKind::Float,
width: 4,
pointer_space: None,
};
self.get_type_id(local_type.into())
}
pub(super) fn get_uint3_type_id(&mut self) -> Word {
let local_type = LocalType::Value {
vector_size: Some(crate::VectorSize::Tri),
kind: crate::ScalarKind::Uint,
width: 4,
pointer_space: None,
};
self.get_type_id(local_type.into())
}
pub(super) fn get_float_pointer_type_id(&mut self, class: spirv::StorageClass) -> Word {
let lookup_type = LookupType::Local(LocalType::Value {
vector_size: None,
kind: crate::ScalarKind::Float,
width: 4,
pointer_space: Some(class),
});
if let Some(&id) = self.lookup_type.get(&lookup_type) {
id
} else {
let id = self.id_gen.next();
let ty_id = self.get_float_type_id();
let instruction = Instruction::type_pointer(id, class, ty_id);
instruction.to_words(&mut self.logical_layout.declarations);
self.lookup_type.insert(lookup_type, id);
id
}
}
pub(super) fn get_uint3_pointer_type_id(&mut self, class: spirv::StorageClass) -> Word {
let lookup_type = LookupType::Local(LocalType::Value {
vector_size: Some(crate::VectorSize::Tri),
kind: crate::ScalarKind::Uint,
width: 4,
pointer_space: Some(class),
});
if let Some(&id) = self.lookup_type.get(&lookup_type) {
id
} else {
let id = self.id_gen.next();
let ty_id = self.get_uint3_type_id();
let instruction = Instruction::type_pointer(id, class, ty_id);
instruction.to_words(&mut self.logical_layout.declarations);
self.lookup_type.insert(lookup_type, id);
id
}
}
pub(super) fn get_bool_type_id(&mut self) -> Word {
let local_type = LocalType::Value {
vector_size: None,
kind: crate::ScalarKind::Bool,
width: 1,
pointer_space: None,
};
self.get_type_id(local_type.into())
}
pub(super) fn get_bool3_type_id(&mut self) -> Word {
let local_type = LocalType::Value {
vector_size: Some(crate::VectorSize::Tri),
kind: crate::ScalarKind::Bool,
width: 1,
pointer_space: None,
};
self.get_type_id(local_type.into())
}
pub(super) fn decorate(&mut self, id: Word, decoration: spirv::Decoration, operands: &[Word]) {
self.annotations
.push(Instruction::decorate(id, decoration, operands));
}
fn write_function(
&mut self,
ir_function: &crate::Function,
info: &FunctionInfo,
ir_module: &crate::Module,
mut interface: Option<FunctionInterface>,
) -> Result<Word, Error> {
let mut function = Function::default();
for (handle, variable) in ir_function.local_variables.iter() {
let id = self.id_gen.next();
if self.flags.contains(WriterFlags::DEBUG) {
if let Some(ref name) = variable.name {
self.debugs.push(Instruction::name(id, name));
}
}
let init_word = variable
.init
.map(|constant| self.constant_ids[constant.index()]);
let pointer_type_id =
self.get_pointer_id(&ir_module.types, variable.ty, spirv::StorageClass::Function)?;
let instruction = Instruction::variable(
pointer_type_id,
id,
spirv::StorageClass::Function,
init_word.or_else(|| {
let type_id = self.get_type_id(LookupType::Handle(variable.ty));
Some(self.write_constant_null(type_id))
}),
);
function
.variables
.insert(handle, LocalVariable { id, instruction });
}
let prelude_id = self.id_gen.next();
let mut prelude = Block::new(prelude_id);
let mut ep_context = EntryPointContext {
argument_ids: Vec::new(),
results: Vec::new(),
};
let mut global_invocation_id = None;
let mut parameter_type_ids = Vec::with_capacity(ir_function.arguments.len());
for argument in ir_function.arguments.iter() {
let class = spirv::StorageClass::Input;
let handle_ty = ir_module.types[argument.ty].inner.is_handle();
let argument_type_id = match handle_ty {
true => self.get_pointer_id(
&ir_module.types,
argument.ty,
spirv::StorageClass::UniformConstant,
)?,
false => self.get_type_id(LookupType::Handle(argument.ty)),
};
if let Some(ref mut iface) = interface {
let id = if let Some(ref binding) = argument.binding {
let name = argument.name.as_deref();
let varying_id = self.write_varying(
ir_module,
iface.stage,
class,
name,
argument.ty,
binding,
)?;
iface.varying_ids.push(varying_id);
let id = self.id_gen.next();
prelude
.body
.push(Instruction::load(argument_type_id, id, varying_id, None));
if binding == &crate::Binding::BuiltIn(crate::BuiltIn::GlobalInvocationId) {
global_invocation_id = Some(id);
}
id
} else if let crate::TypeInner::Struct { ref members, .. } =
ir_module.types[argument.ty].inner
{
let struct_id = self.id_gen.next();
let mut constituent_ids = Vec::with_capacity(members.len());
for member in members {
let type_id = self.get_type_id(LookupType::Handle(member.ty));
let name = member.name.as_deref();
let binding = member.binding.as_ref().unwrap();
let varying_id = self.write_varying(
ir_module,
iface.stage,
class,
name,
member.ty,
binding,
)?;
iface.varying_ids.push(varying_id);
let id = self.id_gen.next();
prelude
.body
.push(Instruction::load(type_id, id, varying_id, None));
constituent_ids.push(id);
if binding == &crate::Binding::BuiltIn(crate::BuiltIn::GlobalInvocationId) {
global_invocation_id = Some(id);
}
}
prelude.body.push(Instruction::composite_construct(
argument_type_id,
struct_id,
&constituent_ids,
));
struct_id
} else {
unreachable!("Missing argument binding on an entry point");
};
ep_context.argument_ids.push(id);
} else {
let argument_id = self.id_gen.next();
let instruction = Instruction::function_parameter(argument_type_id, argument_id);
if self.flags.contains(WriterFlags::DEBUG) {
if let Some(ref name) = argument.name {
self.debugs.push(Instruction::name(argument_id, name));
}
}
function.parameters.push(FunctionArgument {
instruction,
handle_id: if handle_ty {
let id = self.id_gen.next();
prelude.body.push(Instruction::load(
self.get_type_id(LookupType::Handle(argument.ty)),
id,
argument_id,
None,
));
id
} else {
0
},
});
parameter_type_ids.push(argument_type_id);
};
}
let return_type_id = match ir_function.result {
Some(ref result) => {
if let Some(ref mut iface) = interface {
let mut has_point_size = false;
let class = spirv::StorageClass::Output;
if let Some(ref binding) = result.binding {
has_point_size |=
*binding == crate::Binding::BuiltIn(crate::BuiltIn::PointSize);
let type_id = self.get_type_id(LookupType::Handle(result.ty));
let varying_id = self.write_varying(
ir_module,
iface.stage,
class,
None,
result.ty,
binding,
)?;
iface.varying_ids.push(varying_id);
ep_context.results.push(ResultMember {
id: varying_id,
type_id,
built_in: binding.to_built_in(),
});
} else if let crate::TypeInner::Struct { ref members, .. } =
ir_module.types[result.ty].inner
{
for member in members {
let type_id = self.get_type_id(LookupType::Handle(member.ty));
let name = member.name.as_deref();
let binding = member.binding.as_ref().unwrap();
has_point_size |=
*binding == crate::Binding::BuiltIn(crate::BuiltIn::PointSize);
let varying_id = self.write_varying(
ir_module,
iface.stage,
class,
name,
member.ty,
binding,
)?;
iface.varying_ids.push(varying_id);
ep_context.results.push(ResultMember {
id: varying_id,
type_id,
built_in: binding.to_built_in(),
});
}
} else {
unreachable!("Missing result binding on an entry point");
}
if self.flags.contains(WriterFlags::FORCE_POINT_SIZE)
&& iface.stage == crate::ShaderStage::Vertex
&& !has_point_size
{
let varying_id = self.id_gen.next();
let pointer_type_id = self.get_float_pointer_type_id(class);
Instruction::variable(pointer_type_id, varying_id, class, None)
.to_words(&mut self.logical_layout.declarations);
self.decorate(
varying_id,
spirv::Decoration::BuiltIn,
&[spirv::BuiltIn::PointSize as u32],
);
iface.varying_ids.push(varying_id);
let default_value_id =
self.get_constant_scalar(crate::ScalarValue::Float(1.0), 4);
prelude
.body
.push(Instruction::store(varying_id, default_value_id, None));
}
self.void_type
} else {
self.get_type_id(LookupType::Handle(result.ty))
}
}
None => self.void_type,
};
let lookup_function_type = LookupFunctionType {
parameter_type_ids,
return_type_id,
};
let function_id = self.id_gen.next();
if self.flags.contains(WriterFlags::DEBUG) {
if let Some(ref name) = ir_function.name {
self.debugs.push(Instruction::name(function_id, name));
}
}
let function_type = self.get_function_type(lookup_function_type);
function.signature = Some(Instruction::function(
return_type_id,
function_id,
spirv::FunctionControl::empty(),
function_type,
));
if interface.is_some() {
function.entry_point_context = Some(ep_context);
}
for gv in self.global_variables.iter_mut() {
gv.reset_for_function();
}
for (handle, var) in ir_module.global_variables.iter() {
if info[handle].is_empty() {
continue;
}
let mut gv = self.global_variables[handle.index()].clone();
let is_binding_array = match ir_module.types[var.ty].inner {
crate::TypeInner::BindingArray { .. } => true,
_ => false,
};
if var.space == crate::AddressSpace::Handle && !is_binding_array {
let var_type_id = self.get_type_id(LookupType::Handle(var.ty));
let id = self.id_gen.next();
prelude
.body
.push(Instruction::load(var_type_id, id, gv.var_id, None));
gv.access_id = gv.var_id;
gv.handle_id = id;
} else if global_needs_wrapper(ir_module, var) {
let class = map_storage_class(var.space);
let pointer_type_id = self.get_pointer_id(&ir_module.types, var.ty, class)?;
let index_id = self.get_index_constant(0);
let id = self.id_gen.next();
prelude.body.push(Instruction::access_chain(
pointer_type_id,
id,
gv.var_id,
&[index_id],
));
gv.access_id = id;
} else {
gv.access_id = gv.var_id;
};
self.global_variables[handle.index()] = gv;
}
let mut context = BlockContext {
ir_module,
ir_function,
fun_info: info,
function: &mut function,
cached: std::mem::take(&mut self.saved_cached),
temp_list: std::mem::take(&mut self.temp_list),
writer: self,
};
context.cached.reset(ir_function.expressions.len());
for (handle, expr) in ir_function.expressions.iter() {
if expr.needs_pre_emit() {
context.cache_expression_value(handle, &mut prelude)?;
}
}
let next_id = context.gen_id();
context
.function
.consume(prelude, Instruction::branch(next_id));
let workgroup_vars_init_exit_block_id =
match (context.writer.zero_initialize_workgroup_memory, interface) {
(
super::ZeroInitializeWorkgroupMemoryMode::Polyfill,
Some(
ref mut interface @ FunctionInterface {
stage: crate::ShaderStage::Compute,
..
},
),
) => context.writer.generate_workgroup_vars_init_block(
next_id,
ir_module,
info,
global_invocation_id,
interface,
context.function,
),
_ => None,
};
let main_id = if let Some(exit_id) = workgroup_vars_init_exit_block_id {
exit_id
} else {
next_id
};
context.write_block(
main_id,
&ir_function.body,
super::block::BlockExit::Return,
LoopContext::default(),
)?;
let BlockContext {
cached, temp_list, ..
} = context;
self.saved_cached = cached;
self.temp_list = temp_list;
function.to_words(&mut self.logical_layout.function_definitions);
Instruction::function_end().to_words(&mut self.logical_layout.function_definitions);
Ok(function_id)
}
fn write_execution_mode(
&mut self,
function_id: Word,
mode: spirv::ExecutionMode,
) -> Result<(), Error> {
Instruction::execution_mode(function_id, mode, &[])
.to_words(&mut self.logical_layout.execution_modes);
Ok(())
}
fn write_entry_point(
&mut self,
entry_point: &crate::EntryPoint,
info: &FunctionInfo,
ir_module: &crate::Module,
) -> Result<Instruction, Error> {
let mut interface_ids = Vec::new();
let function_id = self.write_function(
&entry_point.function,
info,
ir_module,
Some(FunctionInterface {
varying_ids: &mut interface_ids,
stage: entry_point.stage,
}),
)?;
let exec_model = match entry_point.stage {
crate::ShaderStage::Vertex => spirv::ExecutionModel::Vertex,
crate::ShaderStage::Fragment => {
self.write_execution_mode(function_id, spirv::ExecutionMode::OriginUpperLeft)?;
if let Some(ref result) = entry_point.function.result {
if contains_builtin(
result.binding.as_ref(),
result.ty,
&ir_module.types,
crate::BuiltIn::FragDepth,
) {
self.write_execution_mode(
function_id,
spirv::ExecutionMode::DepthReplacing,
)?;
}
}
spirv::ExecutionModel::Fragment
}
crate::ShaderStage::Compute => {
let execution_mode = spirv::ExecutionMode::LocalSize;
Instruction::execution_mode(
function_id,
execution_mode,
&entry_point.workgroup_size,
)
.to_words(&mut self.logical_layout.execution_modes);
spirv::ExecutionModel::GLCompute
}
};
Ok(Instruction::entry_point(
exec_model,
function_id,
&entry_point.name,
interface_ids.as_slice(),
))
}
fn make_scalar(
&mut self,
id: Word,
kind: crate::ScalarKind,
width: crate::Bytes,
) -> Instruction {
use crate::ScalarKind as Sk;
let bits = (width * BITS_PER_BYTE) as u32;
match kind {
Sk::Sint | Sk::Uint => {
let signedness = if kind == Sk::Sint {
super::instructions::Signedness::Signed
} else {
super::instructions::Signedness::Unsigned
};
let cap = match bits {
8 => Some(spirv::Capability::Int8),
16 => Some(spirv::Capability::Int16),
64 => Some(spirv::Capability::Int64),
_ => None,
};
if let Some(cap) = cap {
self.capabilities_used.insert(cap);
}
Instruction::type_int(id, bits, signedness)
}
Sk::Float => {
if bits == 64 {
self.capabilities_used.insert(spirv::Capability::Float64);
}
Instruction::type_float(id, bits)
}
Sk::Bool => Instruction::type_bool(id),
}
}
fn request_image_capabilities(&mut self, inner: &crate::TypeInner) -> Result<(), Error> {
if let crate::TypeInner::Image {
dim,
arrayed,
class,
} = *inner
{
let sampled = match class {
crate::ImageClass::Sampled { .. } => true,
crate::ImageClass::Depth { .. } => true,
crate::ImageClass::Storage { format, .. } => {
self.request_image_format_capabilities(format.into())?;
false
}
};
match dim {
crate::ImageDimension::D1 => {
if sampled {
self.require_any("sampled 1D images", &[spirv::Capability::Sampled1D])?;
} else {
self.require_any("1D storage images", &[spirv::Capability::Image1D])?;
}
}
crate::ImageDimension::Cube if arrayed => {
if sampled {
self.require_any(
"sampled cube array images",
&[spirv::Capability::SampledCubeArray],
)?;
} else {
self.require_any(
"cube array storage images",
&[spirv::Capability::ImageCubeArray],
)?;
}
}
_ => {}
}
}
Ok(())
}
fn write_type_declaration_local(&mut self, id: Word, local_ty: LocalType) {
let instruction = match local_ty {
LocalType::Value {
vector_size: None,
kind,
width,
pointer_space: None,
} => self.make_scalar(id, kind, width),
LocalType::Value {
vector_size: Some(size),
kind,
width,
pointer_space: None,
} => {
let scalar_id = self.get_type_id(LookupType::Local(LocalType::Value {
vector_size: None,
kind,
width,
pointer_space: None,
}));
Instruction::type_vector(id, scalar_id, size)
}
LocalType::Matrix {
columns,
rows,
width,
} => {
let vector_id = self.get_type_id(LookupType::Local(LocalType::Value {
vector_size: Some(rows),
kind: crate::ScalarKind::Float,
width,
pointer_space: None,
}));
Instruction::type_matrix(id, vector_id, columns)
}
LocalType::Pointer { base, class } => {
let type_id = self.get_type_id(LookupType::Handle(base));
Instruction::type_pointer(id, class, type_id)
}
LocalType::Value {
vector_size,
kind,
width,
pointer_space: Some(class),
} => {
let type_id = self.get_type_id(LookupType::Local(LocalType::Value {
vector_size,
kind,
width,
pointer_space: None,
}));
Instruction::type_pointer(id, class, type_id)
}
LocalType::Image(image) => {
let local_type = LocalType::Value {
vector_size: None,
kind: image.sampled_type,
width: 4,
pointer_space: None,
};
let type_id = self.get_type_id(LookupType::Local(local_type));
Instruction::type_image(id, type_id, image.dim, image.flags, image.image_format)
}
LocalType::Sampler => Instruction::type_sampler(id),
LocalType::SampledImage { image_type_id } => {
Instruction::type_sampled_image(id, image_type_id)
}
LocalType::BindingArray { base, size } => {
let inner_ty = self.get_type_id(LookupType::Handle(base));
let scalar_id = self.get_constant_scalar(crate::ScalarValue::Uint(size), 4);
Instruction::type_array(id, inner_ty, scalar_id)
}
LocalType::PointerToBindingArray { base, size } => {
let inner_ty =
self.get_type_id(LookupType::Local(LocalType::BindingArray { base, size }));
Instruction::type_pointer(id, spirv::StorageClass::UniformConstant, inner_ty)
}
};
instruction.to_words(&mut self.logical_layout.declarations);
}
fn write_type_declaration_arena(
&mut self,
arena: &UniqueArena<crate::Type>,
handle: Handle<crate::Type>,
) -> Result<Word, Error> {
let ty = &arena[handle];
let id = if let Some(local) = make_local(&ty.inner) {
match self.lookup_type.entry(LookupType::Local(local)) {
Entry::Occupied(e) => *e.get(),
Entry::Vacant(e) => {
let id = self.id_gen.next();
e.insert(id);
self.write_type_declaration_local(id, local);
self.request_image_capabilities(&ty.inner)?;
id
}
}
} else {
use spirv::Decoration;
let id = self.id_gen.next();
let instruction = match ty.inner {
crate::TypeInner::Array { base, size, stride } => {
self.decorate(id, Decoration::ArrayStride, &[stride]);
let type_id = self.get_type_id(LookupType::Handle(base));
match size {
crate::ArraySize::Constant(const_handle) => {
let length_id = self.constant_ids[const_handle.index()];
Instruction::type_array(id, type_id, length_id)
}
crate::ArraySize::Dynamic => Instruction::type_runtime_array(id, type_id),
}
}
crate::TypeInner::BindingArray { base, size } => {
let type_id = self.get_type_id(LookupType::Handle(base));
match size {
crate::ArraySize::Constant(const_handle) => {
let length_id = self.constant_ids[const_handle.index()];
Instruction::type_array(id, type_id, length_id)
}
crate::ArraySize::Dynamic => Instruction::type_runtime_array(id, type_id),
}
}
crate::TypeInner::Struct {
ref members,
span: _,
} => {
let mut member_ids = Vec::with_capacity(members.len());
for (index, member) in members.iter().enumerate() {
self.decorate_struct_member(id, index, member, arena)?;
let member_id = self.get_type_id(LookupType::Handle(member.ty));
member_ids.push(member_id);
}
Instruction::type_struct(id, member_ids.as_slice())
}
crate::TypeInner::Scalar { .. }
| crate::TypeInner::Atomic { .. }
| crate::TypeInner::Vector { .. }
| crate::TypeInner::Matrix { .. }
| crate::TypeInner::Pointer { .. }
| crate::TypeInner::ValuePointer { .. }
| crate::TypeInner::Image { .. }
| crate::TypeInner::Sampler { .. } => unreachable!(),
};
instruction.to_words(&mut self.logical_layout.declarations);
id
};
self.lookup_type.insert(LookupType::Handle(handle), id);
if self.flags.contains(WriterFlags::DEBUG) {
if let Some(ref name) = ty.name {
self.debugs.push(Instruction::name(id, name));
}
}
Ok(id)
}
fn request_image_format_capabilities(
&mut self,
format: spirv::ImageFormat,
) -> Result<(), Error> {
use spirv::ImageFormat as If;
match format {
If::Rg32f
| If::Rg16f
| If::R11fG11fB10f
| If::R16f
| If::Rgba16
| If::Rgb10A2
| If::Rg16
| If::Rg8
| If::R16
| If::R8
| If::Rgba16Snorm
| If::Rg16Snorm
| If::Rg8Snorm
| If::R16Snorm
| If::R8Snorm
| If::Rg32i
| If::Rg16i
| If::Rg8i
| If::R16i
| If::R8i
| If::Rgb10a2ui
| If::Rg32ui
| If::Rg16ui
| If::Rg8ui
| If::R16ui
| If::R8ui => self.require_any(
"storage image format",
&[spirv::Capability::StorageImageExtendedFormats],
),
If::R64ui | If::R64i => self.require_any(
"64-bit integer storage image format",
&[spirv::Capability::Int64ImageEXT],
),
If::Unknown
| If::Rgba32f
| If::Rgba16f
| If::R32f
| If::Rgba8
| If::Rgba8Snorm
| If::Rgba32i
| If::Rgba16i
| If::Rgba8i
| If::R32i
| If::Rgba32ui
| If::Rgba16ui
| If::Rgba8ui
| If::R32ui => Ok(()),
}
}
pub(super) fn get_index_constant(&mut self, index: Word) -> Word {
self.get_constant_scalar(crate::ScalarValue::Uint(index as _), 4)
}
pub(super) fn get_constant_scalar(
&mut self,
value: crate::ScalarValue,
width: crate::Bytes,
) -> Word {
if let Some(&id) = self.cached_constants.get(&(value, width)) {
return id;
}
let id = self.id_gen.next();
self.write_constant_scalar(id, &value, width, None);
self.cached_constants.insert((value, width), id);
id
}
fn write_constant_scalar(
&mut self,
id: Word,
value: &crate::ScalarValue,
width: crate::Bytes,
debug_name: Option<&String>,
) {
if self.flags.contains(WriterFlags::DEBUG) {
if let Some(name) = debug_name {
self.debugs.push(Instruction::name(id, name));
}
}
let type_id = self.get_type_id(LookupType::Local(LocalType::Value {
vector_size: None,
kind: value.scalar_kind(),
width,
pointer_space: None,
}));
let (solo, pair);
let instruction = match *value {
crate::ScalarValue::Sint(val) => {
let words = match width {
4 => {
solo = [val as u32];
&solo[..]
}
8 => {
pair = [val as u32, (val >> 32) as u32];
&pair
}
_ => unreachable!(),
};
Instruction::constant(type_id, id, words)
}
crate::ScalarValue::Uint(val) => {
let words = match width {
4 => {
solo = [val as u32];
&solo[..]
}
8 => {
pair = [val as u32, (val >> 32) as u32];
&pair
}
_ => unreachable!(),
};
Instruction::constant(type_id, id, words)
}
crate::ScalarValue::Float(val) => {
let words = match width {
4 => {
solo = [(val as f32).to_bits()];
&solo[..]
}
8 => {
let bits = f64::to_bits(val);
pair = [bits as u32, (bits >> 32) as u32];
&pair
}
_ => unreachable!(),
};
Instruction::constant(type_id, id, words)
}
crate::ScalarValue::Bool(true) => Instruction::constant_true(type_id, id),
crate::ScalarValue::Bool(false) => Instruction::constant_false(type_id, id),
};
instruction.to_words(&mut self.logical_layout.declarations);
}
fn write_constant_composite(
&mut self,
id: Word,
ty: Handle<crate::Type>,
components: &[Handle<crate::Constant>],
) -> Result<(), Error> {
let mut constituent_ids = Vec::with_capacity(components.len());
for constituent in components.iter() {
let constituent_id = self.constant_ids[constituent.index()];
constituent_ids.push(constituent_id);
}
let type_id = self.get_type_id(LookupType::Handle(ty));
Instruction::constant_composite(type_id, id, constituent_ids.as_slice())
.to_words(&mut self.logical_layout.declarations);
Ok(())
}
pub(super) fn write_constant_null(&mut self, type_id: Word) -> Word {
let null_id = self.id_gen.next();
Instruction::constant_null(type_id, null_id)
.to_words(&mut self.logical_layout.declarations);
null_id
}
pub(super) fn write_barrier(&mut self, flags: crate::Barrier, block: &mut Block) {
let memory_scope = if flags.contains(crate::Barrier::STORAGE) {
spirv::Scope::Device
} else {
spirv::Scope::Workgroup
};
let mut semantics = spirv::MemorySemantics::ACQUIRE_RELEASE;
semantics.set(
spirv::MemorySemantics::UNIFORM_MEMORY,
flags.contains(crate::Barrier::STORAGE),
);
semantics.set(
spirv::MemorySemantics::WORKGROUP_MEMORY,
flags.contains(crate::Barrier::WORK_GROUP),
);
let exec_scope_id = self.get_index_constant(spirv::Scope::Workgroup as u32);
let mem_scope_id = self.get_index_constant(memory_scope as u32);
let semantics_id = self.get_index_constant(semantics.bits());
block.body.push(Instruction::control_barrier(
exec_scope_id,
mem_scope_id,
semantics_id,
));
}
fn generate_workgroup_vars_init_block(
&mut self,
entry_id: Word,
ir_module: &crate::Module,
info: &FunctionInfo,
global_invocation_id: Option<Word>,
interface: &mut FunctionInterface,
function: &mut Function,
) -> Option<Word> {
let body = ir_module
.global_variables
.iter()
.filter(|&(handle, var)| {
!info[handle].is_empty() && var.space == crate::AddressSpace::WorkGroup
})
.map(|(handle, var)| {
let var_id = self.global_variables[handle.index()].var_id;
let var_type_id = self.get_type_id(LookupType::Handle(var.ty));
let init_word = self.write_constant_null(var_type_id);
Instruction::store(var_id, init_word, None)
})
.collect::<Vec<_>>();
if body.is_empty() {
return None;
}
let uint3_type_id = self.get_uint3_type_id();
let mut pre_if_block = Block::new(entry_id);
let global_invocation_id = if let Some(global_invocation_id) = global_invocation_id {
global_invocation_id
} else {
let varying_id = self.id_gen.next();
let class = spirv::StorageClass::Input;
let pointer_type_id = self.get_uint3_pointer_type_id(class);
Instruction::variable(pointer_type_id, varying_id, class, None)
.to_words(&mut self.logical_layout.declarations);
self.decorate(
varying_id,
spirv::Decoration::BuiltIn,
&[spirv::BuiltIn::GlobalInvocationId as u32],
);
interface.varying_ids.push(varying_id);
let id = self.id_gen.next();
pre_if_block
.body
.push(Instruction::load(uint3_type_id, id, varying_id, None));
id
};
let zero_id = self.write_constant_null(uint3_type_id);
let bool3_type_id = self.get_bool3_type_id();
let eq_id = self.id_gen.next();
pre_if_block.body.push(Instruction::binary(
spirv::Op::IEqual,
bool3_type_id,
eq_id,
global_invocation_id,
zero_id,
));
let condition_id = self.id_gen.next();
let bool_type_id = self.get_bool_type_id();
pre_if_block.body.push(Instruction::relational(
spirv::Op::All,
bool_type_id,
condition_id,
eq_id,
));
let merge_id = self.id_gen.next();
pre_if_block.body.push(Instruction::selection_merge(
merge_id,
spirv::SelectionControl::NONE,
));
let accept_id = self.id_gen.next();
function.consume(
pre_if_block,
Instruction::branch_conditional(condition_id, accept_id, merge_id),
);
let accept_block = Block {
label_id: accept_id,
body,
};
function.consume(accept_block, Instruction::branch(merge_id));
let mut post_if_block = Block::new(merge_id);
self.write_barrier(crate::Barrier::WORK_GROUP, &mut post_if_block);
let next_id = self.id_gen.next();
function.consume(post_if_block, Instruction::branch(next_id));
Some(next_id)
}
fn write_varying(
&mut self,
ir_module: &crate::Module,
stage: crate::ShaderStage,
class: spirv::StorageClass,
debug_name: Option<&str>,
ty: Handle<crate::Type>,
binding: &crate::Binding,
) -> Result<Word, Error> {
let id = self.id_gen.next();
let pointer_type_id = self.get_pointer_id(&ir_module.types, ty, class)?;
Instruction::variable(pointer_type_id, id, class, None)
.to_words(&mut self.logical_layout.declarations);
if self
.flags
.contains(WriterFlags::DEBUG | WriterFlags::LABEL_VARYINGS)
{
if let Some(name) = debug_name {
self.debugs.push(Instruction::name(id, name));
}
}
use spirv::{BuiltIn, Decoration};
match *binding {
crate::Binding::Location {
location,
interpolation,
sampling,
} => {
self.decorate(id, Decoration::Location, &[location]);
if class != spirv::StorageClass::Input || stage != crate::ShaderStage::Vertex {
match interpolation {
None | Some(crate::Interpolation::Perspective) => (),
Some(crate::Interpolation::Flat) => {
self.decorate(id, Decoration::Flat, &[]);
}
Some(crate::Interpolation::Linear) => {
self.decorate(id, Decoration::NoPerspective, &[]);
}
}
}
match sampling {
None | Some(crate::Sampling::Center) => (),
Some(crate::Sampling::Centroid) => {
self.decorate(id, Decoration::Centroid, &[]);
}
Some(crate::Sampling::Sample) => {
self.require_any(
"per-sample interpolation",
&[spirv::Capability::SampleRateShading],
)?;
self.decorate(id, Decoration::Sample, &[]);
}
}
}
crate::Binding::BuiltIn(built_in) => {
use crate::BuiltIn as Bi;
let built_in = match built_in {
Bi::Position { invariant } => {
if invariant {
self.decorate(id, Decoration::Invariant, &[]);
}
if class == spirv::StorageClass::Output {
BuiltIn::Position
} else {
BuiltIn::FragCoord
}
}
Bi::ViewIndex => {
self.require_any("`view_index` built-in", &[spirv::Capability::MultiView])?;
BuiltIn::ViewIndex
}
Bi::BaseInstance => BuiltIn::BaseInstance,
Bi::BaseVertex => BuiltIn::BaseVertex,
Bi::ClipDistance => BuiltIn::ClipDistance,
Bi::CullDistance => BuiltIn::CullDistance,
Bi::InstanceIndex => BuiltIn::InstanceIndex,
Bi::PointSize => BuiltIn::PointSize,
Bi::VertexIndex => BuiltIn::VertexIndex,
Bi::FragDepth => BuiltIn::FragDepth,
Bi::PointCoord => BuiltIn::PointCoord,
Bi::FrontFacing => BuiltIn::FrontFacing,
Bi::PrimitiveIndex => {
self.require_any(
"`primitive_index` built-in",
&[spirv::Capability::Geometry],
)?;
BuiltIn::PrimitiveId
}
Bi::SampleIndex => {
self.require_any(
"`sample_index` built-in",
&[spirv::Capability::SampleRateShading],
)?;
BuiltIn::SampleId
}
Bi::SampleMask => BuiltIn::SampleMask,
Bi::GlobalInvocationId => BuiltIn::GlobalInvocationId,
Bi::LocalInvocationId => BuiltIn::LocalInvocationId,
Bi::LocalInvocationIndex => BuiltIn::LocalInvocationIndex,
Bi::WorkGroupId => BuiltIn::WorkgroupId,
Bi::WorkGroupSize => BuiltIn::WorkgroupSize,
Bi::NumWorkGroups => BuiltIn::NumWorkgroups,
};
self.decorate(id, Decoration::BuiltIn, &[built_in as u32]);
use crate::ScalarKind as Sk;
if class == spirv::StorageClass::Input && stage == crate::ShaderStage::Fragment {
let is_flat = match ir_module.types[ty].inner {
crate::TypeInner::Scalar { kind, .. }
| crate::TypeInner::Vector { kind, .. } => match kind {
Sk::Uint | Sk::Sint | Sk::Bool => true,
Sk::Float => false,
},
_ => false,
};
if is_flat {
self.decorate(id, Decoration::Flat, &[]);
}
}
}
}
Ok(id)
}
fn write_global_variable(
&mut self,
ir_module: &crate::Module,
global_variable: &crate::GlobalVariable,
) -> Result<Word, Error> {
use spirv::Decoration;
let id = self.id_gen.next();
let class = map_storage_class(global_variable.space);
if self.flags.contains(WriterFlags::DEBUG) {
if let Some(ref name) = global_variable.name {
self.debugs.push(Instruction::name(id, name));
}
}
let storage_access = match global_variable.space {
crate::AddressSpace::Storage { access } => Some(access),
_ => match ir_module.types[global_variable.ty].inner {
crate::TypeInner::Image {
class: crate::ImageClass::Storage { access, .. },
..
} => Some(access),
_ => None,
},
};
if let Some(storage_access) = storage_access {
if !storage_access.contains(crate::StorageAccess::LOAD) {
self.decorate(id, Decoration::NonReadable, &[]);
}
if !storage_access.contains(crate::StorageAccess::STORE) {
self.decorate(id, Decoration::NonWritable, &[]);
}
}
let mut substitute_inner_type_lookup = None;
if let Some(ref res_binding) = global_variable.binding {
self.decorate(id, Decoration::DescriptorSet, &[res_binding.group]);
self.decorate(id, Decoration::Binding, &[res_binding.binding]);
if let Some(&BindingInfo {
binding_array_size: Some(remapped_binding_array_size),
}) = self.binding_map.get(res_binding)
{
if let crate::TypeInner::BindingArray { base, .. } =
ir_module.types[global_variable.ty].inner
{
substitute_inner_type_lookup =
Some(LookupType::Local(LocalType::PointerToBindingArray {
base,
size: remapped_binding_array_size as u64,
}))
}
} else {
}
};
let init_word = global_variable
.init
.map(|constant| self.constant_ids[constant.index()]);
let inner_type_id = self.get_type_id(
substitute_inner_type_lookup.unwrap_or(LookupType::Handle(global_variable.ty)),
);
let pointer_type_id = if global_needs_wrapper(ir_module, global_variable) {
let wrapper_type_id = self.id_gen.next();
self.decorate(wrapper_type_id, Decoration::Block, &[]);
let member = crate::StructMember {
name: None,
ty: global_variable.ty,
binding: None,
offset: 0,
};
self.decorate_struct_member(wrapper_type_id, 0, &member, &ir_module.types)?;
Instruction::type_struct(wrapper_type_id, &[inner_type_id])
.to_words(&mut self.logical_layout.declarations);
let pointer_type_id = self.id_gen.next();
Instruction::type_pointer(pointer_type_id, class, wrapper_type_id)
.to_words(&mut self.logical_layout.declarations);
pointer_type_id
} else {
if let crate::AddressSpace::Storage { .. } = global_variable.space {
self.decorate(inner_type_id, Decoration::Block, &[]);
}
if substitute_inner_type_lookup.is_some() {
inner_type_id
} else {
self.get_pointer_id(&ir_module.types, global_variable.ty, class)?
}
};
let init_word = match (global_variable.space, self.zero_initialize_workgroup_memory) {
(crate::AddressSpace::Private, _)
| (crate::AddressSpace::WorkGroup, super::ZeroInitializeWorkgroupMemoryMode::Native) => {
init_word.or_else(|| Some(self.write_constant_null(inner_type_id)))
}
_ => init_word,
};
Instruction::variable(pointer_type_id, id, class, init_word)
.to_words(&mut self.logical_layout.declarations);
Ok(id)
}
fn decorate_struct_member(
&mut self,
struct_id: Word,
index: usize,
member: &crate::StructMember,
arena: &UniqueArena<crate::Type>,
) -> Result<(), Error> {
use spirv::Decoration;
self.annotations.push(Instruction::member_decorate(
struct_id,
index as u32,
Decoration::Offset,
&[member.offset],
));
if self.flags.contains(WriterFlags::DEBUG) {
if let Some(ref name) = member.name {
self.debugs
.push(Instruction::member_name(struct_id, index as u32, name));
}
}
let member_array_subty_inner = match arena[member.ty].inner {
crate::TypeInner::Array { base, .. } => &arena[base].inner,
ref other => other,
};
if let crate::TypeInner::Matrix {
columns: _,
rows,
width,
} = *member_array_subty_inner
{
let byte_stride = Alignment::from(rows) * width as u32;
self.annotations.push(Instruction::member_decorate(
struct_id,
index as u32,
Decoration::ColMajor,
&[],
));
self.annotations.push(Instruction::member_decorate(
struct_id,
index as u32,
Decoration::MatrixStride,
&[byte_stride],
));
}
Ok(())
}
fn get_function_type(&mut self, lookup_function_type: LookupFunctionType) -> Word {
match self
.lookup_function_type
.entry(lookup_function_type.clone())
{
Entry::Occupied(e) => *e.get(),
_ => {
let id = self.id_gen.next();
let instruction = Instruction::type_function(
id,
lookup_function_type.return_type_id,
&lookup_function_type.parameter_type_ids,
);
instruction.to_words(&mut self.logical_layout.declarations);
self.lookup_function_type.insert(lookup_function_type, id);
id
}
}
}
fn write_physical_layout(&mut self) {
self.physical_layout.bound = self.id_gen.0 + 1;
}
fn write_logical_layout(
&mut self,
ir_module: &crate::Module,
mod_info: &ModuleInfo,
ep_index: Option<usize>,
) -> Result<(), Error> {
fn has_view_index_check(
ir_module: &crate::Module,
binding: Option<&crate::Binding>,
ty: Handle<crate::Type>,
) -> bool {
match ir_module.types[ty].inner {
crate::TypeInner::Struct { ref members, .. } => members.iter().any(|member| {
has_view_index_check(ir_module, member.binding.as_ref(), member.ty)
}),
_ => binding == Some(&crate::Binding::BuiltIn(crate::BuiltIn::ViewIndex)),
}
}
let has_storage_buffers =
ir_module
.global_variables
.iter()
.any(|(_, var)| match var.space {
crate::AddressSpace::Storage { .. } => true,
_ => false,
});
let has_view_index = ir_module
.entry_points
.iter()
.flat_map(|entry| entry.function.arguments.iter())
.any(|arg| has_view_index_check(ir_module, arg.binding.as_ref(), arg.ty));
if self.physical_layout.version < 0x10300 && has_storage_buffers {
Instruction::extension("SPV_KHR_storage_buffer_storage_class")
.to_words(&mut self.logical_layout.extensions);
}
if has_view_index {
Instruction::extension("SPV_KHR_multiview")
.to_words(&mut self.logical_layout.extensions)
}
Instruction::type_void(self.void_type).to_words(&mut self.logical_layout.declarations);
Instruction::ext_inst_import(self.gl450_ext_inst_id, "GLSL.std.450")
.to_words(&mut self.logical_layout.ext_inst_imports);
if self.flags.contains(WriterFlags::DEBUG) {
self.debugs
.push(Instruction::source(spirv::SourceLanguage::GLSL, 450));
}
self.constant_ids.resize(ir_module.constants.len(), 0);
for (handle, constant) in ir_module.constants.iter() {
match constant.inner {
crate::ConstantInner::Composite { .. } => continue,
crate::ConstantInner::Scalar { width, ref value } => {
self.constant_ids[handle.index()] = match constant.name {
Some(ref name) => {
let id = self.id_gen.next();
self.write_constant_scalar(id, value, width, Some(name));
id
}
None => self.get_constant_scalar(*value, width),
};
}
}
}
for (handle, _) in ir_module.types.iter() {
self.write_type_declaration_arena(&ir_module.types, handle)?;
}
for (handle, constant) in ir_module.constants.iter() {
match constant.inner {
crate::ConstantInner::Scalar { .. } => continue,
crate::ConstantInner::Composite { ty, ref components } => {
let id = self.id_gen.next();
self.constant_ids[handle.index()] = id;
if self.flags.contains(WriterFlags::DEBUG) {
if let Some(ref name) = constant.name {
self.debugs.push(Instruction::name(id, name));
}
}
self.write_constant_composite(id, ty, components)?;
}
}
}
debug_assert_eq!(self.constant_ids.iter().position(|&id| id == 0), None);
for (handle, var) in ir_module.global_variables.iter() {
let gvar = match ep_index {
Some(index) if mod_info.get_entry_point(index)[handle].is_empty() => {
GlobalVariable::dummy()
}
_ => {
let id = self.write_global_variable(ir_module, var)?;
GlobalVariable::new(id)
}
};
self.global_variables.push(gvar);
}
for (handle, ir_function) in ir_module.functions.iter() {
let info = &mod_info[handle];
if let Some(index) = ep_index {
let ep_info = mod_info.get_entry_point(index);
if !ep_info.dominates_global_use(info) {
log::info!("Skip function {:?}", ir_function.name);
continue;
}
}
let id = self.write_function(ir_function, info, ir_module, None)?;
self.lookup_function.insert(handle, id);
}
for (index, ir_ep) in ir_module.entry_points.iter().enumerate() {
if ep_index.is_some() && ep_index != Some(index) {
continue;
}
let info = mod_info.get_entry_point(index);
let ep_instruction = self.write_entry_point(ir_ep, info, ir_module)?;
ep_instruction.to_words(&mut self.logical_layout.entry_points);
}
for capability in self.capabilities_used.iter() {
Instruction::capability(*capability).to_words(&mut self.logical_layout.capabilities);
}
for extension in self.extensions_used.iter() {
Instruction::extension(extension).to_words(&mut self.logical_layout.extensions);
}
if ir_module.entry_points.is_empty() {
Instruction::capability(spirv::Capability::Linkage)
.to_words(&mut self.logical_layout.capabilities);
}
let addressing_model = spirv::AddressingModel::Logical;
let memory_model = spirv::MemoryModel::GLSL450;
Instruction::memory_model(addressing_model, memory_model)
.to_words(&mut self.logical_layout.memory_model);
if self.flags.contains(WriterFlags::DEBUG) {
for debug in self.debugs.iter() {
debug.to_words(&mut self.logical_layout.debugs);
}
}
for annotation in self.annotations.iter() {
annotation.to_words(&mut self.logical_layout.annotations);
}
Ok(())
}
pub fn write(
&mut self,
ir_module: &crate::Module,
info: &ModuleInfo,
pipeline_options: Option<&PipelineOptions>,
words: &mut Vec<Word>,
) -> Result<(), Error> {
self.reset();
let ep_index = match pipeline_options {
Some(po) => {
let index = ir_module
.entry_points
.iter()
.position(|ep| po.shader_stage == ep.stage && po.entry_point == ep.name)
.ok_or(Error::EntryPointNotFound)?;
Some(index)
}
None => None,
};
self.write_logical_layout(ir_module, info, ep_index)?;
self.write_physical_layout();
self.physical_layout.in_words(words);
self.logical_layout.in_words(words);
Ok(())
}
pub const fn get_capabilities_used(&self) -> &crate::FastHashSet<spirv::Capability> {
&self.capabilities_used
}
}
#[test]
fn test_write_physical_layout() {
let mut writer = Writer::new(&Options::default()).unwrap();
assert_eq!(writer.physical_layout.bound, 0);
writer.write_physical_layout();
assert_eq!(writer.physical_layout.bound, 3);
}