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-rw-r--r--gfx/wr/glsl-to-cxx/src/lib.rs3670
1 files changed, 3670 insertions, 0 deletions
diff --git a/gfx/wr/glsl-to-cxx/src/lib.rs b/gfx/wr/glsl-to-cxx/src/lib.rs
new file mode 100644
index 0000000000..9b54fcc1ec
--- /dev/null
+++ b/gfx/wr/glsl-to-cxx/src/lib.rs
@@ -0,0 +1,3670 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+extern crate glsl;
+
+mod hir;
+
+use glsl::parser::Parse;
+use glsl::syntax;
+use glsl::syntax::{TranslationUnit, UnaryOp};
+use hir::{Statement, SwizzleSelector, Type};
+use std::cell::{Cell, RefCell};
+use std::collections::{BTreeMap, HashMap};
+use std::io::Read;
+use std::mem;
+
+#[derive(PartialEq, Eq)]
+enum ShaderKind {
+ Fragment,
+ Vertex,
+}
+
+type UniformIndices = BTreeMap<String, (i32, hir::TypeKind, hir::StorageClass)>;
+
+fn build_uniform_indices(indices: &mut UniformIndices, state: &hir::State) {
+ for u in state.used_globals.borrow().iter() {
+ let sym = state.sym(*u);
+ match &sym.decl {
+ hir::SymDecl::Global(storage, _, ty, _) => match storage {
+ hir::StorageClass::Uniform | hir::StorageClass::Sampler(..) => {
+ let next_index = indices.len() as i32 + 1;
+ indices.entry(sym.name.clone()).or_insert((
+ next_index,
+ ty.kind.clone(),
+ *storage,
+ ));
+ }
+ _ => {}
+ },
+ _ => {}
+ }
+ }
+}
+
+pub fn translate(args: &mut dyn Iterator<Item = String>) -> String {
+ let _cmd_name = args.next();
+ let vertex_file = args.next().unwrap();
+
+ let vs_name = std::path::Path::new(&vertex_file)
+ .file_stem()
+ .unwrap()
+ .to_string_lossy()
+ .to_string();
+
+ let frag_file = args.next().unwrap();
+
+ let fs_name = std::path::Path::new(&frag_file)
+ .file_stem()
+ .unwrap()
+ .to_string_lossy()
+ .to_string();
+
+ let (vs_state, vs_hir, vs_is_frag) = parse_shader(vertex_file);
+ let (fs_state, fs_hir, fs_is_frag) = parse_shader(frag_file);
+
+ // we use a BTree so that iteration is stable
+ let mut uniform_indices = BTreeMap::new();
+ build_uniform_indices(&mut uniform_indices, &vs_state);
+ build_uniform_indices(&mut uniform_indices, &fs_state);
+
+ assert_eq!(fs_name, vs_name);
+
+ let mut result = translate_shader(
+ vs_name,
+ vs_state,
+ vs_hir,
+ vs_is_frag,
+ &uniform_indices,
+ );
+ result += "\n";
+ result += &translate_shader(
+ fs_name,
+ fs_state,
+ fs_hir,
+ fs_is_frag,
+ &uniform_indices,
+ );
+ result
+}
+
+fn parse_shader(file: String) -> (hir::State, hir::TranslationUnit, bool) {
+ let mut contents = String::new();
+ let is_frag = file.contains("frag");
+ std::fs::File::open(&file)
+ .unwrap()
+ .read_to_string(&mut contents)
+ .unwrap();
+ let r = TranslationUnit::parse(contents);
+
+ //println!("{:#?}", r);
+ let mut ast_glsl = String::new();
+ let r = r.unwrap();
+ glsl::transpiler::glsl::show_translation_unit(&mut ast_glsl, &r);
+ //let mut fast = std::fs::File::create("ast").unwrap();
+ //fast.write(ast_glsl.as_bytes());
+
+ let mut state = hir::State::new();
+ let hir = hir::ast_to_hir(&mut state, &r);
+ (state, hir, is_frag)
+}
+
+fn translate_shader(
+ name: String,
+ mut state: hir::State,
+ hir: hir::TranslationUnit,
+ is_frag: bool,
+ uniform_indices: &UniformIndices,
+) -> String {
+ //println!("{:#?}", state);
+
+ hir::infer_run_class(&mut state, &hir);
+
+ let mut uniforms = Vec::new();
+ let mut inputs = Vec::new();
+ let mut outputs = Vec::new();
+
+ for i in &hir {
+ match i {
+ hir::ExternalDeclaration::Declaration(hir::Declaration::InitDeclaratorList(ref d)) => {
+ match &state.sym(d.head.name).decl {
+ hir::SymDecl::Global(storage, ..)
+ if state.used_globals.borrow().contains(&d.head.name) =>
+ {
+ match storage {
+ hir::StorageClass::Uniform | hir::StorageClass::Sampler(..) => {
+ uniforms.push(d.head.name);
+ }
+ hir::StorageClass::In => {
+ inputs.push(d.head.name);
+ }
+ hir::StorageClass::Out | hir::StorageClass::FragColor(_) => {
+ outputs.push(d.head.name);
+ }
+ _ => {}
+ }
+ }
+ _ => {}
+ }
+ }
+ _ => {}
+ }
+ }
+
+ //println!("{:#?}", hir);
+
+ let mut state = OutputState {
+ hir: state,
+ output: String::new(),
+ buffer: RefCell::new(String::new()),
+ indent: 0,
+ should_indent: false,
+ output_cxx: false,
+ mask: None,
+ cond_index: 0,
+ return_type: None,
+ return_declared: false,
+ return_vector: false,
+ is_scalar: Cell::new(false),
+ is_lval: Cell::new(false),
+ name: name.clone(),
+ kind: if is_frag {
+ ShaderKind::Fragment
+ } else {
+ ShaderKind::Vertex
+ },
+ functions: HashMap::new(),
+ deps: RefCell::new(Vec::new()),
+ vector_mask: 0,
+ uses_discard: false,
+ used_fragcoord: Cell::new(0),
+ use_perspective: false,
+ used_globals: RefCell::new(Vec::new()),
+ texel_fetches: RefCell::new(Vec::new()),
+ };
+
+ show_translation_unit(&mut state, &hir);
+ let _output_glsl = state.finish_output();
+
+ state.should_indent = true;
+ state.output_cxx = true;
+
+ if state.output_cxx {
+ let part_name = name.to_owned()
+ + match state.kind {
+ ShaderKind::Vertex => "_vert",
+ ShaderKind::Fragment => "_frag",
+ };
+
+ if state.kind == ShaderKind::Vertex {
+ write_common_globals(&mut state, &inputs, &outputs, uniform_indices);
+ write!(state, "struct {0}_vert : VertexShaderImpl, {0}_common {{\nprivate:\n", name);
+ } else {
+ write!(state, "struct {0}_frag : FragmentShaderImpl, {0}_vert {{\nprivate:\n", name);
+ }
+
+ write!(state, "typedef {} Self;\n", part_name);
+
+ show_translation_unit(&mut state, &hir);
+
+ let pruned_inputs: Vec<_> = inputs
+ .iter()
+ .filter(|i| state.used_globals.borrow().contains(i))
+ .cloned()
+ .collect();
+
+ if state.kind == ShaderKind::Vertex {
+ write_set_uniform_1i(&mut state, uniform_indices);
+ write_set_uniform_4fv(&mut state, uniform_indices);
+ write_set_uniform_matrix4fv(&mut state, uniform_indices);
+ write_load_attribs(&mut state, &pruned_inputs);
+ write_store_outputs(&mut state, &outputs);
+ } else {
+ write_read_inputs(&mut state, &pruned_inputs);
+ }
+
+ write_abi(&mut state);
+ write!(state, "}};\n\n");
+
+ if state.kind == ShaderKind::Fragment {
+ write!(state, "struct {0}_program : ProgramImpl, {0}_frag {{\n", name);
+ write_get_uniform_index(&mut state, uniform_indices);
+ write!(state, "void bind_attrib(const char* name, int index) override {{\n");
+ write!(state, " attrib_locations.bind_loc(name, index);\n}}\n");
+ write!(state, "int get_attrib(const char* name) const override {{\n");
+ write!(state, " return attrib_locations.get_loc(name);\n}}\n");
+ write!(state, "size_t interpolants_size() const override {{ return sizeof(InterpOutputs); }}\n");
+ write!(state, "VertexShaderImpl* get_vertex_shader() override {{\n");
+ write!(state, " return this;\n}}\n");
+ write!(state, "FragmentShaderImpl* get_fragment_shader() override {{\n");
+ write!(state, " return this;\n}}\n");
+ write!(state, "const char* get_name() const override {{ return \"{}\"; }}\n", name);
+ write!(state, "static ProgramImpl* loader() {{ return new {}_program; }}\n", name);
+ write!(state, "}};\n\n");
+ }
+
+ define_global_consts(&mut state, &hir, &part_name);
+ } else {
+ show_translation_unit(&mut state, &hir);
+ }
+ let output_cxx = state.finish_output();
+
+ //let mut hir = std::fs::File::create("hir").unwrap();
+ //hir.write(output_glsl.as_bytes());
+
+ output_cxx
+}
+
+fn write_get_uniform_index(state: &mut OutputState, uniform_indices: &UniformIndices) {
+ write!(
+ state,
+ "int get_uniform(const char *name) const override {{\n"
+ );
+ for (uniform_name, (index, _, _)) in uniform_indices.iter() {
+ write!(
+ state,
+ " if (strcmp(\"{}\", name) == 0) {{ return {}; }}\n",
+ uniform_name, index
+ );
+ }
+ write!(state, " return -1;\n");
+ write!(state, "}}\n");
+}
+
+fn float4_compatible(ty: hir::TypeKind) -> bool {
+ match ty {
+ hir::TypeKind::Vec4 => true,
+ _ => false,
+ }
+}
+
+fn matrix4_compatible(ty: hir::TypeKind) -> bool {
+ match ty {
+ hir::TypeKind::Mat4 => true,
+ _ => false,
+ }
+}
+
+fn write_program_samplers(state: &mut OutputState, uniform_indices: &UniformIndices) {
+ write!(state, "struct Samplers {{\n");
+ for (name, (_, tk, storage)) in uniform_indices.iter() {
+ match tk {
+ hir::TypeKind::Sampler2D
+ | hir::TypeKind::Sampler2DRect
+ | hir::TypeKind::ISampler2D
+ | hir::TypeKind::Sampler2DArray => {
+ write!(state, " ");
+ show_type_kind(state, &tk);
+ let suffix = if let hir::StorageClass::Sampler(format) = storage {
+ format.type_suffix()
+ } else {
+ None
+ };
+ write!(state, "{}_impl {}_impl;\n", suffix.unwrap_or(""), name);
+ write!(state, " int {}_slot;\n", name);
+ }
+ _ => {}
+ }
+ }
+ write!(
+ state,
+ " bool set_slot(int index, int value) {{\n"
+ );
+ write!(state, " switch (index) {{\n");
+ for (name, (index, tk, _)) in uniform_indices.iter() {
+ match tk {
+ hir::TypeKind::Sampler2D
+ | hir::TypeKind::Sampler2DRect
+ | hir::TypeKind::ISampler2D
+ | hir::TypeKind::Sampler2DArray => {
+ write!(state, " case {}:\n", index);
+ write!(state, " {}_slot = value;\n", name);
+ write!(state, " return true;\n");
+ }
+ _ => {}
+ }
+ }
+ write!(state, " }}\n");
+ write!(state, " return false;\n");
+ write!(state, " }}\n");
+ write!(state, "}} samplers;\n");
+
+}
+
+fn write_bind_textures(state: &mut OutputState, uniforms: &UniformIndices) {
+ write!(state, "void bind_textures() {{\n");
+ for (name, (_, tk, storage)) in uniforms {
+ match storage {
+ hir::StorageClass::Sampler(_format) => {
+ match tk {
+ hir::TypeKind::Sampler2D
+ | hir::TypeKind::Sampler2DRect => write!(state,
+ " {0} = lookup_sampler(&samplers.{0}_impl, samplers.{0}_slot);\n",
+ name),
+ hir::TypeKind::ISampler2D => write!(state,
+ " {0} = lookup_isampler(&samplers.{0}_impl, samplers.{0}_slot);\n",
+ name),
+ hir::TypeKind::Sampler2DArray => write!(state,
+ " {0} = lookup_sampler_array(&samplers.{0}_impl, samplers.{0}_slot);\n",
+ name),
+ _ => {}
+ };
+ }
+ _ => {}
+ }
+ }
+ write!(state, "}}\n");
+}
+
+fn write_set_uniform_1i(
+ state: &mut OutputState,
+ uniforms: &UniformIndices,
+) {
+ write!(
+ state,
+ "static void set_uniform_1i(Self *self, int index, int value) {{\n"
+ );
+ write!(state, " if (self->samplers.set_slot(index, value)) return;\n");
+ write!(state, " switch (index) {{\n");
+ for (name, (index, tk, _)) in uniforms {
+ write!(state, " case {}:\n", index);
+ match tk {
+ hir::TypeKind::Int => write!(
+ state,
+ " self->{} = {}(value);\n",
+ name,
+ tk.cxx_primitive_scalar_type_name().unwrap(),
+ ),
+ _ => write!(state, " assert(0); // {}\n", name),
+ };
+ write!(state, " break;\n");
+ }
+ write!(state, " }}\n");
+ write!(state, "}}\n");
+}
+
+fn write_set_uniform_4fv(
+ state: &mut OutputState,
+ uniforms: &UniformIndices,
+) {
+ write!(
+ state,
+ "static void set_uniform_4fv(Self *self, int index, const float *value) {{\n"
+ );
+ write!(state, " switch (index) {{\n");
+ for (name, (index, tk, _)) in uniforms {
+ write!(state, " case {}:\n", index);
+ if float4_compatible(tk.clone()) {
+ write!(
+ state,
+ " self->{} = {}_scalar(value);\n",
+ name,
+ tk.glsl_primitive_type_name().unwrap(),
+ );
+ } else {
+ write!(state, " assert(0); // {}\n", name);
+ }
+ write!(state, " break;\n");
+ }
+ write!(state, " }}\n");
+ write!(state, "}}\n");
+}
+
+fn write_set_uniform_matrix4fv(
+ state: &mut OutputState,
+ uniforms: &UniformIndices,
+) {
+ write!(
+ state,
+ "static void set_uniform_matrix4fv(Self *self, int index, const float *value) {{\n"
+ );
+ write!(state, " switch (index) {{\n");
+ for (name, (index, tk, _)) in uniforms {
+ write!(state, " case {}:\n", index);
+ if matrix4_compatible(tk.clone()) {
+ write!(
+ state,
+ " self->{} = mat4_scalar::load_from_ptr(value);\n",
+ name
+ );
+ } else {
+ write!(state, " assert(0); // {}\n", name);
+ }
+ write!(state, " break;\n");
+ }
+ write!(state, " }}\n");
+ write!(state, "}}\n");
+}
+
+fn write_bind_attrib_location(state: &mut OutputState, attribs: &[hir::SymRef]) {
+ write!(state, "struct AttribLocations {{\n");
+ for i in attribs {
+ let sym = state.hir.sym(*i);
+ write!(state, " int {} = NULL_ATTRIB;\n", sym.name.as_str());
+ }
+ write!(state, " void bind_loc(const char* name, int index) {{\n");
+ for i in attribs {
+ let sym = state.hir.sym(*i);
+ write!(
+ state,
+ " if (strcmp(\"{0}\", name) == 0) {{ {0} = index; return; }}\n",
+ sym.name.as_str()
+ );
+ }
+ write!(state, " }}\n");
+ write!(state, " int get_loc(const char* name) const {{\n");
+ for i in attribs {
+ let sym = state.hir.sym(*i);
+ write!(state,
+ " if (strcmp(\"{0}\", name) == 0) {{ \
+ return {0} != NULL_ATTRIB ? {0} : -1; \
+ }}\n",
+ sym.name.as_str());
+ }
+ write!(state, " return -1;\n");
+ write!(state, " }}\n");
+ write!(state, "}} attrib_locations;\n");
+}
+
+fn write_common_globals(state: &mut OutputState, attribs: &[hir::SymRef],
+ outputs: &[hir::SymRef], uniforms: &UniformIndices) {
+ write!(state, "struct {}_common {{\n", state.name);
+
+ write_program_samplers(state, uniforms);
+ write_bind_attrib_location(state, attribs);
+
+ let is_scalar = state.is_scalar.replace(true);
+ for i in outputs {
+ let sym = state.hir.sym(*i);
+ match &sym.decl {
+ hir::SymDecl::Global(hir::StorageClass::Out, _, ty, hir::RunClass::Scalar) => {
+ show_type(state, ty);
+ write!(state, " {};\n", sym.name.as_str());
+ }
+ _ => {}
+ }
+ }
+ for (name, (_, tk, storage)) in uniforms {
+ match storage {
+ hir::StorageClass::Sampler(format) => {
+ write!(state,
+ "{}{} {};\n",
+ tk.cxx_primitive_type_name().unwrap(),
+ format.type_suffix().unwrap_or(""),
+ name,
+ );
+ }
+ _ => {
+ show_type_kind(state, tk);
+ write!(state, " {};\n", name);
+ }
+ }
+ }
+ state.is_scalar.set(is_scalar);
+
+ write_bind_textures(state, uniforms);
+
+ write!(state, "}};\n");
+}
+
+//fn type_name(state: &OutputState, ty: &Type) -> String {
+// let buffer = state.push_buffer();
+// show_type(state, ty);
+// state.pop_buffer(buffer)
+//}
+
+fn write_load_attribs(state: &mut OutputState, attribs: &[hir::SymRef]) {
+ write!(state, "static void load_attribs(\
+ Self *self, VertexAttrib *attribs, \
+ uint32_t start, int instance, int count) {{\n");
+ for i in attribs {
+ let sym = state.hir.sym(*i);
+ match &sym.decl {
+ hir::SymDecl::Global(_, _interpolation, _ty, run_class) => {
+ let name = sym.name.as_str();
+ let func = if *run_class == hir::RunClass::Scalar {
+ "load_flat_attrib"
+ } else {
+ "load_attrib"
+ };
+ write!(state,
+ " {0}(self->{1}, attribs[self->attrib_locations.{1}], start, instance, count);\n",
+ func, name);
+ }
+ _ => panic!(),
+ }
+ }
+ write!(state, "}}\n");
+}
+
+fn write_store_outputs(state: &mut OutputState, outputs: &[hir::SymRef]) {
+ let is_scalar = state.is_scalar.replace(true);
+ write!(state, "public:\nstruct InterpOutputs {{\n");
+ for i in outputs {
+ let sym = state.hir.sym(*i);
+ match &sym.decl {
+ hir::SymDecl::Global(_, _, ty, run_class) => {
+ if *run_class != hir::RunClass::Scalar {
+ show_type(state, ty);
+ write!(state, " {};\n", sym.name.as_str());
+ }
+ }
+ _ => panic!(),
+ }
+ }
+
+ write!(state, "}};\nprivate:\n");
+ state.is_scalar.set(is_scalar);
+
+ write!(
+ state,
+ "ALWAYS_INLINE void store_interp_outputs(char* dest_ptr, size_t stride) {{\n"
+ );
+ write!(state, " for(int n = 0; n < 4; n++) {{\n");
+ write!(
+ state,
+ " auto* dest = reinterpret_cast<InterpOutputs*>(dest_ptr);\n"
+ );
+ for i in outputs {
+ let sym = state.hir.sym(*i);
+ match &sym.decl {
+ hir::SymDecl::Global(_, _, _, run_class) => {
+ if *run_class != hir::RunClass::Scalar {
+ let name = sym.name.as_str();
+ write!(state, " dest->{} = get_nth({}, n);\n", name, name);
+ }
+ }
+ _ => panic!(),
+ }
+ }
+ write!(state, " dest_ptr += stride;\n");
+ write!(state, " }}\n");
+ write!(state, "}}\n");
+}
+
+fn write_read_inputs(state: &mut OutputState, inputs: &[hir::SymRef]) {
+ write!(
+ state,
+ "typedef {}_vert::InterpOutputs InterpInputs;\n",
+ state.name
+ );
+
+ write!(state, "InterpInputs interp_step;\n");
+
+ let mut has_varying = false;
+ for i in inputs {
+ let sym = state.hir.sym(*i);
+ match &sym.decl {
+ hir::SymDecl::Global(_, _, ty, run_class) => {
+ if *run_class != hir::RunClass::Scalar {
+ if !has_varying {
+ has_varying = true;
+ write!(state, "struct InterpPerspective {{\n");
+ }
+ show_type(state, ty);
+ write!(state, " {};\n", sym.name.as_str());
+ }
+ }
+ _ => panic!(),
+ }
+ }
+ if has_varying {
+ write!(state, "}};\n");
+ write!(state, "InterpPerspective interp_perspective;\n");
+ }
+
+ write!(state,
+ "static void read_interp_inputs(\
+ Self *self, const InterpInputs *init, const InterpInputs *step) {{\n");
+ for i in inputs {
+ let sym = state.hir.sym(*i);
+ match &sym.decl {
+ hir::SymDecl::Global(_, _, _, run_class) => {
+ if *run_class != hir::RunClass::Scalar {
+ let name = sym.name.as_str();
+ write!(
+ state,
+ " self->{0} = init_interp(init->{0}, step->{0});\n",
+ name
+ );
+ write!(
+ state,
+ " self->interp_step.{0} = step->{0} * 4.0f;\n",
+ name
+ );
+ }
+ }
+ _ => panic!(),
+ }
+ }
+ write!(state, "}}\n");
+
+ let used_fragcoord = state.used_fragcoord.get();
+ if has_varying || (used_fragcoord & (4 | 8)) != 0 {
+ state.use_perspective = true;
+ }
+ if state.use_perspective {
+ write!(state,
+ "static void read_perspective_inputs(\
+ Self *self, const InterpInputs *init, const InterpInputs *step) {{\n");
+ if has_varying {
+ write!(state, " Float w = 1.0f / self->gl_FragCoord.w;\n");
+ }
+ for i in inputs {
+ let sym = state.hir.sym(*i);
+ match &sym.decl {
+ hir::SymDecl::Global(_, _, _, run_class) => {
+ if *run_class != hir::RunClass::Scalar {
+ let name = sym.name.as_str();
+ write!(
+ state,
+ " self->interp_perspective.{0} = init_interp(init->{0}, step->{0});\n",
+ name
+ );
+ write!(state, " self->{0} = self->interp_perspective.{0} * w;\n", name);
+ write!(
+ state,
+ " self->interp_step.{0} = step->{0} * 4.0f;\n",
+ name
+ );
+ }
+ }
+ _ => panic!(),
+ }
+ }
+ write!(state, "}}\n");
+ }
+
+ write!(state, "ALWAYS_INLINE void step_interp_inputs(int steps = 4) {{\n");
+ if (used_fragcoord & 1) != 0 {
+ write!(state, " step_fragcoord(steps);\n");
+ }
+ if !inputs.is_empty() {
+ write!(state, " float chunks = steps * 0.25f;\n");
+ }
+ for i in inputs {
+ let sym = state.hir.sym(*i);
+ match &sym.decl {
+ hir::SymDecl::Global(_, _, _, run_class) => {
+ if *run_class != hir::RunClass::Scalar {
+ let name = sym.name.as_str();
+ write!(state, " {0} += interp_step.{0} * chunks;\n", name);
+ }
+ }
+ _ => panic!(),
+ }
+ }
+ write!(state, "}}\n");
+
+ if state.use_perspective {
+ write!(state, "ALWAYS_INLINE void step_perspective_inputs(int steps = 4) {{\n");
+ if (used_fragcoord & 1) != 0 {
+ write!(state, " step_fragcoord(steps);\n");
+ }
+ write!(state, " step_perspective(steps);\n");
+ if !inputs.is_empty() {
+ write!(state, " float chunks = steps * 0.25f;\n");
+ }
+ if has_varying {
+ write!(state, " Float w = 1.0f / gl_FragCoord.w;\n");
+ }
+ for i in inputs {
+ let sym = state.hir.sym(*i);
+ match &sym.decl {
+ hir::SymDecl::Global(_, _, _, run_class) => {
+ if *run_class != hir::RunClass::Scalar {
+ let name = sym.name.as_str();
+ write!(state, " interp_perspective.{0} += interp_step.{0} * chunks;\n", name);
+ write!(state, " {0} = w * interp_perspective.{0};\n", name);
+ }
+ }
+ _ => panic!(),
+ }
+ }
+ write!(state, "}}\n");
+ }
+}
+
+pub struct OutputState {
+ hir: hir::State,
+ output: String,
+ buffer: RefCell<String>,
+ should_indent: bool,
+ output_cxx: bool,
+ indent: i32,
+ mask: Option<Box<hir::Expr>>,
+ cond_index: usize,
+ return_type: Option<Box<hir::Type>>,
+ return_declared: bool,
+ return_vector: bool,
+ is_scalar: Cell<bool>,
+ is_lval: Cell<bool>,
+ name: String,
+ kind: ShaderKind,
+ functions: HashMap<(hir::SymRef, u32), bool>,
+ deps: RefCell<Vec<(hir::SymRef, u32)>>,
+ vector_mask: u32,
+ uses_discard: bool,
+ used_fragcoord: Cell<i32>,
+ use_perspective: bool,
+ used_globals: RefCell<Vec<hir::SymRef>>,
+ texel_fetches: RefCell<Vec<(hir::SymRef, hir::SymRef, hir::TexelFetchOffsets)>>,
+}
+
+use std::fmt::{Arguments, Write};
+
+impl OutputState {
+ fn indent(&mut self) {
+ if self.should_indent {
+ self.indent += 1
+ }
+ }
+ fn outdent(&mut self) {
+ if self.should_indent {
+ self.indent -= 1
+ }
+ }
+
+ fn write(&self, s: &str) {
+ self.buffer.borrow_mut().push_str(s);
+ }
+
+ fn flush_buffer(&mut self) {
+ self.output.push_str(&self.buffer.borrow());
+ self.buffer.borrow_mut().clear();
+ }
+
+ fn finish_output(&mut self) -> String {
+ self.flush_buffer();
+
+ let mut s = String::new();
+ mem::swap(&mut self.output, &mut s);
+ s
+ }
+
+ fn push_buffer(&self) -> String {
+ self.buffer.replace(String::new())
+ }
+
+ fn pop_buffer(&self, s: String) -> String {
+ self.buffer.replace(s)
+ }
+
+ fn write_fmt(&self, args: Arguments) {
+ let _ = self.buffer.borrow_mut().write_fmt(args);
+ }
+}
+
+pub fn show_identifier(state: &OutputState, i: &syntax::Identifier) {
+ state.write(&i.0);
+}
+
+fn glsl_primitive_type_name_to_cxx(glsl_name: &str) -> &str {
+ hir::TypeKind::from_glsl_primitive_type_name(glsl_name)
+ .and_then(|kind| kind.cxx_primitive_type_name())
+ .unwrap_or(glsl_name)
+}
+
+fn add_used_global(state: &OutputState, i: &hir::SymRef) {
+ let mut globals = state.used_globals.borrow_mut();
+ if !globals.contains(i) {
+ globals.push(*i);
+ }
+}
+
+pub fn show_sym(state: &OutputState, i: &hir::SymRef) {
+ let sym = state.hir.sym(*i);
+ match &sym.decl {
+ hir::SymDecl::NativeFunction(_, ref cxx_name, _) => {
+ let mut name = sym.name.as_str();
+ if state.output_cxx {
+ name = cxx_name.unwrap_or(name);
+ }
+ state.write(name);
+ }
+ hir::SymDecl::Global(..) => {
+ if state.output_cxx {
+ add_used_global(state, i);
+ }
+ let mut name = sym.name.as_str();
+ if state.output_cxx {
+ name = glsl_primitive_type_name_to_cxx(name);
+ }
+ state.write(name);
+ }
+ hir::SymDecl::UserFunction(..) | hir::SymDecl::Local(..) | hir::SymDecl::Struct(..) => {
+ let mut name = sym.name.as_str();
+ // we want to replace constructor names
+ if state.output_cxx {
+ name = glsl_primitive_type_name_to_cxx(name);
+ }
+ state.write(name);
+ }
+ }
+}
+
+pub fn show_variable(state: &OutputState, i: &hir::SymRef) {
+ let sym = state.hir.sym(*i);
+ match &sym.decl {
+ hir::SymDecl::Global(_, _, ty, _) => {
+ show_type(state, ty);
+ state.write(" ");
+ let mut name = sym.name.as_str();
+ if state.output_cxx {
+ name = glsl_primitive_type_name_to_cxx(name);
+ }
+ state.write(name);
+ }
+ _ => panic!(),
+ }
+}
+
+pub fn write_default_constructor(state: &OutputState, name: &str) {
+ // write default constructor
+ let _ = write!(state, "{}() = default;\n", name);
+}
+
+pub fn write_constructor(state: &OutputState, name: &str, s: &hir::StructFields) {
+ if s.fields.len() == 1 {
+ state.write("explicit ");
+ }
+ let _ = write!(state, "{}(", name);
+ let mut first_field = true;
+ for field in &s.fields {
+ if !first_field {
+ state.write(", ");
+ }
+ show_type(state, &field.ty);
+ state.write(" ");
+ show_identifier_and_type(state, &field.name, &field.ty);
+ first_field = false;
+ }
+ state.write(") : ");
+
+ let mut first_field = true;
+ for field in &s.fields {
+ if !first_field {
+ state.write(", ");
+ }
+ let _ = write!(state, "{}({})", field.name, field.name);
+ first_field = false;
+ }
+ state.write("{}\n");
+}
+
+pub fn write_convert_constructor(state: &OutputState, name: &str, s: &hir::StructFields) {
+ if s.fields.len() == 1 {
+ state.write("explicit ");
+ }
+ let _ = write!(state, "{}(", name);
+ let mut first_field = true;
+ for field in &s.fields {
+ if !first_field {
+ state.write(", ");
+ }
+
+ let is_scalar = state.is_scalar.replace(true);
+ show_type(state, &field.ty);
+ state.is_scalar.set(is_scalar);
+
+ state.write(" ");
+
+ show_identifier_and_type(state, &field.name, &field.ty);
+ first_field = false;
+ }
+ state.write(")");
+
+ let mut first_field = true;
+ for hir::StructField { ty, name } in &s.fields {
+ if ty.array_sizes.is_none() {
+ if first_field {
+ state.write(":");
+ } else {
+ state.write(",");
+ }
+ let _ = write!(state, "{}({})", name, name);
+ first_field = false;
+ }
+ }
+ state.write("{\n");
+ for hir::StructField { ty, name } in &s.fields {
+ if ty.array_sizes.is_some() {
+ let _ = write!(state, "this->{}.convert({});\n", name, name);
+ }
+ }
+ state.write("}\n");
+
+ let _ = write!(state, "IMPLICIT {}({}_scalar s)", name, name);
+ let mut first_field = true;
+ for hir::StructField { ty, name } in &s.fields {
+ if ty.array_sizes.is_none() {
+ if first_field {
+ state.write(":");
+ } else {
+ state.write(",");
+ }
+ let _ = write!(state, "{}(s.{})", name, name);
+ first_field = false;
+ }
+ }
+ state.write("{\n");
+ for hir::StructField { ty, name } in &s.fields {
+ if ty.array_sizes.is_some() {
+ let _ = write!(state, "{}.convert(s.{});\n", name, name);
+ }
+ }
+ state.write("}\n");
+}
+
+pub fn write_if_then_else(state: &OutputState, name: &str, s: &hir::StructFields) {
+ let _ = write!(
+ state,
+ "friend {} if_then_else(I32 c, {} t, {} e) {{ return {}(\n",
+ name, name, name, name
+ );
+ let mut first_field = true;
+ for field in &s.fields {
+ if !first_field {
+ state.write(", ");
+ }
+ let _ = write!(state, "if_then_else(c, t.{}, e.{})", field.name, field.name);
+ first_field = false;
+ }
+ state.write(");\n}");
+}
+
+pub fn show_storage_class(state: &OutputState, q: &hir::StorageClass) {
+ match *q {
+ hir::StorageClass::None => {}
+ hir::StorageClass::Const => {
+ state.write("const ");
+ }
+ hir::StorageClass::In => {
+ state.write("in ");
+ }
+ hir::StorageClass::Out => {
+ state.write("out ");
+ }
+ hir::StorageClass::FragColor(index) => {
+ write!(state, "layout(location = 0, index = {}) out ", index);
+ }
+ hir::StorageClass::Uniform | hir::StorageClass::Sampler(..) => {
+ state.write("uniform ");
+ }
+ }
+}
+
+pub fn show_sym_decl(state: &OutputState, i: &hir::SymRef) {
+ let sym = state.hir.sym(*i);
+ match &sym.decl {
+ hir::SymDecl::Global(storage, ..) => {
+ if !state.output_cxx {
+ show_storage_class(state, storage)
+ }
+ if storage == &hir::StorageClass::Const {
+ state.write("static constexpr ");
+ }
+ let mut name = sym.name.as_str();
+ if state.output_cxx {
+ name = glsl_primitive_type_name_to_cxx(name);
+ }
+ state.write(name);
+ }
+ hir::SymDecl::Local(storage, ..) => {
+ if !state.output_cxx {
+ show_storage_class(state, storage)
+ }
+ if storage == &hir::StorageClass::Const {
+ state.write("const ");
+ }
+ let mut name = sym.name.as_str();
+ if state.output_cxx {
+ name = glsl_primitive_type_name_to_cxx(name);
+ }
+ state.write(name);
+ }
+ hir::SymDecl::Struct(s) => {
+ let name = sym.name.as_str();
+
+ if state.output_cxx {
+ let name_scalar = format!("{}_scalar", name);
+ write!(state, "struct {} {{\n", name_scalar);
+ let is_scalar = state.is_scalar.replace(true);
+ for field in &s.fields {
+ show_struct_field(state, field);
+ }
+ write_default_constructor(state, &name_scalar);
+ write_constructor(state, &name_scalar, s);
+ state.is_scalar.set(is_scalar);
+ state.write("};\n");
+ }
+
+ write!(state, "struct {} {{\n", name);
+ for field in &s.fields {
+ show_struct_field(state, field);
+ }
+
+ // write if_then_else
+ if state.output_cxx {
+ write_default_constructor(state, name);
+ write_constructor(state, name, s);
+ write_convert_constructor(state, name, s);
+ write_if_then_else(state, name, s);
+ }
+ state.write("}");
+ }
+ _ => panic!(),
+ }
+}
+
+pub fn show_type_name(state: &OutputState, t: &syntax::TypeName) {
+ state.write(&t.0);
+}
+
+pub fn show_type_specifier_non_array(state: &mut OutputState, t: &syntax::TypeSpecifierNonArray) {
+ if let Some(kind) = hir::TypeKind::from_primitive_type_specifier(t) {
+ show_type_kind(state, &kind);
+ } else {
+ match t {
+ syntax::TypeSpecifierNonArray::Struct(ref _s) => panic!(), //show_struct_non_declaration(state, s),
+ syntax::TypeSpecifierNonArray::TypeName(ref tn) => show_type_name(state, tn),
+ _ => unreachable!(),
+ }
+ }
+}
+
+pub fn show_type_kind(state: &OutputState, t: &hir::TypeKind) {
+ if state.output_cxx {
+ if state.is_scalar.get() {
+ if let Some(name) = t.cxx_primitive_scalar_type_name() {
+ state.write(name);
+ } else if let Some(name) = t.cxx_primitive_type_name() {
+ let mut scalar_name = String::from(name);
+ scalar_name.push_str("_scalar");
+ state.write(scalar_name.as_str());
+ } else {
+ match t {
+ hir::TypeKind::Struct(ref s) => {
+ let mut scalar_name = String::from(state.hir.sym(*s).name.as_str());
+ scalar_name.push_str("_scalar");
+ state.write(scalar_name.as_str());
+ }
+ _ => unreachable!(),
+ }
+ }
+ } else if let Some(name) = t.cxx_primitive_type_name() {
+ state.write(name);
+ } else {
+ match t {
+ hir::TypeKind::Struct(ref s) => {
+ state.write(state.hir.sym(*s).name.as_str());
+ }
+ _ => unreachable!(),
+ }
+ }
+ } else if let Some(name) = t.glsl_primitive_type_name() {
+ state.write(name);
+ } else {
+ match t {
+ hir::TypeKind::Struct(ref s) => {
+ state.write(state.hir.sym(*s).name.as_str());
+ }
+ _ => unreachable!(),
+ }
+ }
+}
+
+pub fn show_type_specifier(state: &mut OutputState, t: &syntax::TypeSpecifier) {
+ show_type_specifier_non_array(state, &t.ty);
+
+ if let Some(ref arr_spec) = t.array_specifier {
+ show_array_spec(state, arr_spec);
+ }
+}
+
+pub fn show_type(state: &OutputState, t: &Type) {
+ if !state.output_cxx {
+ if let Some(ref precision) = t.precision {
+ show_precision_qualifier(state, precision);
+ state.write(" ");
+ }
+ }
+
+ if state.output_cxx {
+ if let Some(ref array) = t.array_sizes {
+ state.write("Array<");
+ show_type_kind(state, &t.kind);
+ let size = match &array.sizes[..] {
+ [size] => size,
+ _ => panic!(),
+ };
+ state.write(",");
+ show_hir_expr(state, size);
+ state.write(">");
+ } else {
+ show_type_kind(state, &t.kind);
+ }
+ } else {
+ show_type_kind(state, &t.kind);
+ }
+
+ /*if let Some(ref arr_spec) = t.array_sizes {
+ panic!();
+ }*/
+}
+
+/*pub fn show_fully_specified_type(state: &mut OutputState, t: &FullySpecifiedType) {
+ state.flat = false;
+ if let Some(ref qual) = t.qualifier {
+ if !state.output_cxx {
+ show_type_qualifier(state, &qual);
+ } else {
+ state.flat =
+ qual.qualifiers.0.iter()
+ .flat_map(|q| match q { syntax::TypeQualifierSpec::Interpolation(Flat) => Some(()), _ => None})
+ .next().is_some();
+ }
+ state.write(" ");
+ }
+
+ show_type_specifier(state, &t.ty);
+}*/
+
+/*pub fn show_struct_non_declaration(state: &mut OutputState, s: &syntax::StructSpecifier) {
+ state.write("struct ");
+
+ if let Some(ref name) = s.name {
+ let _ = write!(state, "{} ", name);
+ }
+
+ state.write("{\n");
+
+ for field in &s.fields.0 {
+ show_struct_field(state, field);
+ }
+
+ state.write("}");
+}*/
+
+pub fn show_struct(_state: &OutputState, _s: &syntax::StructSpecifier) {
+ panic!();
+ //show_struct_non_declaration(state, s);
+ //state.write(";\n");
+}
+
+pub fn show_struct_field(state: &OutputState, field: &hir::StructField) {
+ show_type(state, &field.ty);
+ state.write(" ");
+
+ show_identifier_and_type(state, &field.name, &field.ty);
+
+ state.write(";\n");
+}
+
+pub fn show_array_spec(state: &OutputState, a: &syntax::ArraySpecifier) {
+ match *a {
+ syntax::ArraySpecifier::Unsized => {
+ state.write("[]");
+ }
+ syntax::ArraySpecifier::ExplicitlySized(ref e) => {
+ state.write("[");
+ show_expr(state, &e);
+ state.write("]");
+ }
+ }
+}
+
+pub fn show_identifier_and_type(state: &OutputState, ident: &syntax::Identifier, ty: &hir::Type) {
+ let _ = write!(state, "{}", ident);
+
+ if !state.output_cxx {
+ if let Some(ref arr_spec) = ty.array_sizes {
+ show_array_sizes(state, &arr_spec);
+ }
+ }
+}
+
+pub fn show_arrayed_identifier(state: &OutputState, ident: &syntax::ArrayedIdentifier) {
+ let _ = write!(state, "{}", ident.ident);
+
+ if let Some(ref arr_spec) = ident.array_spec {
+ show_array_spec(state, &arr_spec);
+ }
+}
+
+pub fn show_array_sizes(state: &OutputState, a: &hir::ArraySizes) {
+ state.write("[");
+ match &a.sizes[..] {
+ [a] => show_hir_expr(state, a),
+ _ => panic!(),
+ }
+
+ state.write("]");
+ /*
+ match *a {
+ syntax::ArraySpecifier::Unsized => { state.write("[]"); }
+ syntax::ArraySpecifier::ExplicitlySized(ref e) => {
+ state.write("[");
+ show_expr(state, &e);
+ state.write("]");
+ }
+ }*/
+}
+
+pub fn show_type_qualifier(state: &OutputState, q: &hir::TypeQualifier) {
+ let mut qualifiers = q.qualifiers.0.iter();
+ let first = qualifiers.next().unwrap();
+
+ show_type_qualifier_spec(state, first);
+
+ for qual_spec in qualifiers {
+ state.write(" ");
+ show_type_qualifier_spec(state, qual_spec)
+ }
+}
+
+pub fn show_type_qualifier_spec(state: &OutputState, q: &hir::TypeQualifierSpec) {
+ match *q {
+ hir::TypeQualifierSpec::Layout(ref l) => show_layout_qualifier(state, &l),
+ hir::TypeQualifierSpec::Parameter(ref _p) => panic!(),
+ hir::TypeQualifierSpec::Memory(ref _m) => panic!(),
+ hir::TypeQualifierSpec::Invariant => {
+ state.write("invariant");
+ }
+ hir::TypeQualifierSpec::Precise => {
+ state.write("precise");
+ }
+ }
+}
+
+pub fn show_syntax_storage_qualifier(state: &OutputState, q: &syntax::StorageQualifier) {
+ match *q {
+ syntax::StorageQualifier::Const => {
+ state.write("const");
+ }
+ syntax::StorageQualifier::InOut => {
+ state.write("inout");
+ }
+ syntax::StorageQualifier::In => {
+ state.write("in");
+ }
+ syntax::StorageQualifier::Out => {
+ state.write("out");
+ }
+ syntax::StorageQualifier::Centroid => {
+ state.write("centroid");
+ }
+ syntax::StorageQualifier::Patch => {
+ state.write("patch");
+ }
+ syntax::StorageQualifier::Sample => {
+ state.write("sample");
+ }
+ syntax::StorageQualifier::Uniform => {
+ state.write("uniform");
+ }
+ syntax::StorageQualifier::Attribute => {
+ state.write("attribute");
+ }
+ syntax::StorageQualifier::Varying => {
+ state.write("varying");
+ }
+ syntax::StorageQualifier::Buffer => {
+ state.write("buffer");
+ }
+ syntax::StorageQualifier::Shared => {
+ state.write("shared");
+ }
+ syntax::StorageQualifier::Coherent => {
+ state.write("coherent");
+ }
+ syntax::StorageQualifier::Volatile => {
+ state.write("volatile");
+ }
+ syntax::StorageQualifier::Restrict => {
+ state.write("restrict");
+ }
+ syntax::StorageQualifier::ReadOnly => {
+ state.write("readonly");
+ }
+ syntax::StorageQualifier::WriteOnly => {
+ state.write("writeonly");
+ }
+ syntax::StorageQualifier::Subroutine(ref n) => show_subroutine(state, &n),
+ }
+}
+
+pub fn show_subroutine(state: &OutputState, types: &[syntax::TypeName]) {
+ state.write("subroutine");
+
+ if !types.is_empty() {
+ state.write("(");
+
+ let mut types_iter = types.iter();
+ let first = types_iter.next().unwrap();
+
+ show_type_name(state, first);
+
+ for type_name in types_iter {
+ state.write(", ");
+ show_type_name(state, type_name);
+ }
+
+ state.write(")");
+ }
+}
+
+pub fn show_layout_qualifier(state: &OutputState, l: &syntax::LayoutQualifier) {
+ let mut qualifiers = l.ids.0.iter();
+ let first = qualifiers.next().unwrap();
+
+ state.write("layout (");
+ show_layout_qualifier_spec(state, first);
+
+ for qual_spec in qualifiers {
+ state.write(", ");
+ show_layout_qualifier_spec(state, qual_spec);
+ }
+
+ state.write(")");
+}
+
+pub fn show_layout_qualifier_spec(state: &OutputState, l: &syntax::LayoutQualifierSpec) {
+ match *l {
+ syntax::LayoutQualifierSpec::Identifier(ref i, Some(ref e)) => {
+ let _ = write!(state, "{} = ", i);
+ show_expr(state, &e);
+ }
+ syntax::LayoutQualifierSpec::Identifier(ref i, None) => show_identifier(state, &i),
+ syntax::LayoutQualifierSpec::Shared => {
+ state.write("shared");
+ }
+ }
+}
+
+pub fn show_precision_qualifier(state: &OutputState, p: &syntax::PrecisionQualifier) {
+ match *p {
+ syntax::PrecisionQualifier::High => {
+ state.write("highp");
+ }
+ syntax::PrecisionQualifier::Medium => {
+ state.write("mediump");
+ }
+ syntax::PrecisionQualifier::Low => {
+ state.write("low");
+ }
+ }
+}
+
+pub fn show_interpolation_qualifier(state: &OutputState, i: &syntax::InterpolationQualifier) {
+ match *i {
+ syntax::InterpolationQualifier::Smooth => {
+ state.write("smooth");
+ }
+ syntax::InterpolationQualifier::Flat => {
+ state.write("flat");
+ }
+ syntax::InterpolationQualifier::NoPerspective => {
+ state.write("noperspective");
+ }
+ }
+}
+
+pub fn show_parameter_qualifier(state: &mut OutputState, i: &Option<hir::ParameterQualifier>) {
+ if let Some(i) = i {
+ if state.output_cxx {
+ match *i {
+ hir::ParameterQualifier::Out => {
+ state.write("&");
+ }
+ hir::ParameterQualifier::InOut => {
+ state.write("&");
+ }
+ _ => {}
+ }
+ } else {
+ match *i {
+ hir::ParameterQualifier::Const => {
+ state.write("const");
+ }
+ hir::ParameterQualifier::In => {
+ state.write("in");
+ }
+ hir::ParameterQualifier::Out => {
+ state.write("out");
+ }
+ hir::ParameterQualifier::InOut => {
+ state.write("inout");
+ }
+ }
+ }
+ }
+}
+
+pub fn show_float(state: &OutputState, x: f32) {
+ if x.fract() == 0. {
+ write!(state, "{}.f", x);
+ } else {
+ write!(state, "{}f", x);
+ }
+}
+
+pub fn show_double(state: &OutputState, x: f64) {
+ // force doubles to print as floats
+ if x.fract() == 0. {
+ write!(state, "{}.f", x);
+ } else {
+ write!(state, "{}f", x);
+ }
+}
+
+trait SwizzelSelectorExt {
+ fn to_args(&self) -> String;
+}
+
+impl SwizzelSelectorExt for SwizzleSelector {
+ fn to_args(&self) -> String {
+ let mut s = Vec::new();
+ let fs = match self.field_set {
+ hir::FieldSet::Rgba => ["R", "G", "B", "A"],
+ hir::FieldSet::Xyzw => ["X", "Y", "Z", "W"],
+ hir::FieldSet::Stpq => ["S", "T", "P", "Q"],
+ };
+ for i in &self.components {
+ s.push(fs[*i as usize])
+ }
+ s.join(", ")
+ }
+}
+
+fn expr_run_class(state: &OutputState, expr: &hir::Expr) -> hir::RunClass {
+ match &expr.kind {
+ hir::ExprKind::Variable(i) => symbol_run_class(&state.hir.sym(*i).decl, state.vector_mask),
+ hir::ExprKind::IntConst(_)
+ | hir::ExprKind::UIntConst(_)
+ | hir::ExprKind::BoolConst(_)
+ | hir::ExprKind::FloatConst(_)
+ | hir::ExprKind::DoubleConst(_) => hir::RunClass::Scalar,
+ hir::ExprKind::Unary(_, ref e) => expr_run_class(state, e),
+ hir::ExprKind::Binary(_, ref l, ref r) => {
+ expr_run_class(state, l).merge(expr_run_class(state, r))
+ }
+ hir::ExprKind::Ternary(ref c, ref s, ref e) => expr_run_class(state, c)
+ .merge(expr_run_class(state, s))
+ .merge(expr_run_class(state, e)),
+ hir::ExprKind::Assignment(ref v, _, ref e) => {
+ expr_run_class(state, v).merge(expr_run_class(state, e))
+ }
+ hir::ExprKind::Bracket(ref e, ref indx) => {
+ expr_run_class(state, e).merge(expr_run_class(state, indx))
+ }
+ hir::ExprKind::FunCall(ref fun, ref args) => {
+ let arg_mask: u32 = args.iter().enumerate().fold(0, |mask, (idx, e)| {
+ if expr_run_class(state, e) == hir::RunClass::Vector {
+ mask | (1 << idx)
+ } else {
+ mask
+ }
+ });
+ match fun {
+ hir::FunIdentifier::Identifier(ref sym) => match &state.hir.sym(*sym).decl {
+ hir::SymDecl::NativeFunction(_, _, ref ret_class) => {
+ if *ret_class != hir::RunClass::Unknown {
+ *ret_class
+ } else if arg_mask != 0 {
+ hir::RunClass::Vector
+ } else {
+ hir::RunClass::Scalar
+ }
+ }
+ hir::SymDecl::UserFunction(ref fd, ref run_class) => {
+ let param_mask: u32 = fd.prototype.parameters.iter().enumerate().fold(
+ arg_mask,
+ |mask, (idx, param)| {
+ if let hir::FunctionParameterDeclaration::Named(Some(qual), p) =
+ param
+ {
+ match qual {
+ hir::ParameterQualifier::InOut
+ | hir::ParameterQualifier::Out => {
+ if symbol_run_class(
+ &state.hir.sym(p.sym).decl,
+ arg_mask,
+ ) == hir::RunClass::Vector
+ {
+ mask | (1 << idx)
+ } else {
+ mask
+ }
+ }
+ _ => mask,
+ }
+ } else {
+ mask
+ }
+ },
+ );
+ match *run_class {
+ hir::RunClass::Scalar => hir::RunClass::Scalar,
+ hir::RunClass::Dependent(mask) => {
+ if (mask & param_mask) != 0 {
+ hir::RunClass::Vector
+ } else {
+ hir::RunClass::Scalar
+ }
+ }
+ _ => hir::RunClass::Vector,
+ }
+ }
+ hir::SymDecl::Struct(..) => {
+ if arg_mask != 0 {
+ hir::RunClass::Vector
+ } else {
+ hir::RunClass::Scalar
+ }
+ }
+ _ => panic!(),
+ },
+ hir::FunIdentifier::Constructor(..) => {
+ if arg_mask != 0 {
+ hir::RunClass::Vector
+ } else {
+ hir::RunClass::Scalar
+ }
+ }
+ }
+ }
+ hir::ExprKind::Dot(ref e, _) => expr_run_class(state, e),
+ hir::ExprKind::SwizzleSelector(ref e, _) => expr_run_class(state, e),
+ hir::ExprKind::PostInc(ref e) => expr_run_class(state, e),
+ hir::ExprKind::PostDec(ref e) => expr_run_class(state, e),
+ hir::ExprKind::Comma(_, ref e) => expr_run_class(state, e),
+ hir::ExprKind::Cond(_, ref e) => expr_run_class(state, e),
+ hir::ExprKind::CondMask => hir::RunClass::Vector,
+ }
+}
+
+pub fn show_hir_expr(state: &OutputState, expr: &hir::Expr) {
+ show_hir_expr_inner(state, expr, false);
+}
+
+pub fn show_hir_expr_inner(state: &OutputState, expr: &hir::Expr, top_level: bool) {
+ match expr.kind {
+ hir::ExprKind::Variable(ref i) => show_sym(state, i),
+ hir::ExprKind::IntConst(ref x) => {
+ let _ = write!(state, "{}", x);
+ }
+ hir::ExprKind::UIntConst(ref x) => {
+ let _ = write!(state, "{}u", x);
+ }
+ hir::ExprKind::BoolConst(ref x) => {
+ let _ = write!(state, "{}", x);
+ }
+ hir::ExprKind::FloatConst(ref x) => show_float(state, *x),
+ hir::ExprKind::DoubleConst(ref x) => show_double(state, *x),
+ hir::ExprKind::Unary(ref op, ref e) => {
+ show_unary_op(state, &op);
+ state.write("(");
+ show_hir_expr(state, &e);
+ state.write(")");
+ }
+ hir::ExprKind::Binary(ref op, ref l, ref r) => {
+ state.write("(");
+ show_hir_expr(state, &l);
+ state.write(")");
+ show_binary_op(state, &op);
+ state.write("(");
+ show_hir_expr(state, &r);
+ state.write(")");
+ }
+ hir::ExprKind::Ternary(ref c, ref s, ref e) => {
+ if state.output_cxx && expr_run_class(state, c) != hir::RunClass::Scalar {
+ state.write("if_then_else(");
+ show_hir_expr(state, &c);
+ state.write(", ");
+ show_hir_expr(state, &s);
+ state.write(", ");
+ show_hir_expr(state, &e);
+ state.write(")");
+ } else {
+ show_hir_expr(state, &c);
+ state.write(" ? ");
+ show_hir_expr(state, &s);
+ state.write(" : ");
+ show_hir_expr(state, &e);
+ }
+ }
+ hir::ExprKind::Assignment(ref v, ref op, ref e) => {
+ let is_output = hir::is_output(v, &state.hir).is_some();
+ let is_scalar_var = expr_run_class(state, v) == hir::RunClass::Scalar;
+ let is_scalar_expr = expr_run_class(state, e) == hir::RunClass::Scalar;
+ let force_scalar = is_scalar_var && !is_scalar_expr;
+
+ if let Some(mask) = &state.mask {
+ let is_scalar_mask = expr_run_class(state, mask) == hir::RunClass::Scalar;
+ let force_scalar_mask = is_scalar_var && is_scalar_expr && !is_scalar_mask;
+
+ if force_scalar || force_scalar_mask {
+ if top_level {
+ state.write("if (");
+ } else {
+ state.write("(");
+ }
+ } else {
+ state.is_lval.set(true);
+ show_hir_expr(state, &v);
+ state.is_lval.set(false);
+ state.write(" = if_then_else(");
+ }
+
+ if is_output && state.return_declared {
+ state.write("((");
+ show_hir_expr(state, mask);
+ state.write(")&ret_mask)");
+ } else {
+ show_hir_expr(state, mask);
+ }
+ if force_scalar || force_scalar_mask {
+ if top_level {
+ state.write("[0]) { ");
+ } else {
+ state.write("[0] ? ");
+ }
+ state.is_lval.set(true);
+ show_hir_expr(state, &v);
+ state.is_lval.set(false);
+ state.write(" = ");
+ } else {
+ state.write(",");
+ }
+
+ if op != &syntax::AssignmentOp::Equal {
+ show_hir_expr(state, &v);
+ }
+
+ match *op {
+ syntax::AssignmentOp::Equal => {}
+ syntax::AssignmentOp::Mult => {
+ state.write("*");
+ }
+ syntax::AssignmentOp::Div => {
+ state.write("/");
+ }
+ syntax::AssignmentOp::Mod => {
+ state.write("%");
+ }
+ syntax::AssignmentOp::Add => {
+ state.write("+");
+ }
+ syntax::AssignmentOp::Sub => {
+ state.write("-");
+ }
+ syntax::AssignmentOp::LShift => {
+ state.write("<<");
+ }
+ syntax::AssignmentOp::RShift => {
+ state.write(">>");
+ }
+ syntax::AssignmentOp::And => {
+ state.write("&");
+ }
+ syntax::AssignmentOp::Xor => {
+ state.write("^");
+ }
+ syntax::AssignmentOp::Or => {
+ state.write("|");
+ }
+ }
+ if force_scalar {
+ state.write("force_scalar(");
+ }
+ show_hir_expr(state, &e);
+ if force_scalar {
+ state.write(")");
+ }
+ if force_scalar || force_scalar_mask {
+ if top_level {
+ state.write("; }");
+ } else {
+ state.write(" : ");
+ show_hir_expr(state, &v);
+ state.write(")");
+ }
+ } else {
+ state.write(",");
+ show_hir_expr(state, &v);
+ state.write(")");
+ }
+ } else {
+ state.is_lval.set(true);
+ show_hir_expr(state, &v);
+ state.is_lval.set(false);
+ state.write(" ");
+
+ if is_output && state.return_declared {
+ state.write("= ");
+ if force_scalar {
+ state.write("force_scalar(");
+ }
+ state.write("if_then_else(ret_mask,");
+
+ if op != &syntax::AssignmentOp::Equal {
+ show_hir_expr(state, &v);
+ }
+
+ match *op {
+ syntax::AssignmentOp::Equal => {}
+ syntax::AssignmentOp::Mult => {
+ state.write("*");
+ }
+ syntax::AssignmentOp::Div => {
+ state.write("/");
+ }
+ syntax::AssignmentOp::Mod => {
+ state.write("%");
+ }
+ syntax::AssignmentOp::Add => {
+ state.write("+");
+ }
+ syntax::AssignmentOp::Sub => {
+ state.write("-");
+ }
+ syntax::AssignmentOp::LShift => {
+ state.write("<<");
+ }
+ syntax::AssignmentOp::RShift => {
+ state.write(">>");
+ }
+ syntax::AssignmentOp::And => {
+ state.write("&");
+ }
+ syntax::AssignmentOp::Xor => {
+ state.write("^");
+ }
+ syntax::AssignmentOp::Or => {
+ state.write("|");
+ }
+ }
+ show_hir_expr(state, &e);
+ state.write(",");
+ show_hir_expr(state, &v);
+ state.write(")");
+ } else {
+ show_assignment_op(state, &op);
+ state.write(" ");
+ if force_scalar {
+ state.write("force_scalar(");
+ }
+ show_hir_expr(state, &e);
+ }
+
+ if force_scalar {
+ state.write(")");
+ }
+ }
+ }
+ hir::ExprKind::Bracket(ref e, ref indx) => {
+ show_hir_expr(state, &e);
+ state.write("[");
+ show_hir_expr(state, indx);
+ state.write("]");
+ }
+ hir::ExprKind::FunCall(ref fun, ref args) => {
+ let mut cond_mask: u32 = 0;
+ let mut adapt_mask: u32 = 0;
+ let mut has_ret = false;
+ let mut array_constructor = false;
+
+ let mut arg_mask: u32 = 0;
+ for (idx, e) in args.iter().enumerate() {
+ if expr_run_class(state, e) == hir::RunClass::Vector {
+ arg_mask |= 1 << idx;
+ }
+ }
+
+ match fun {
+ hir::FunIdentifier::Constructor(t) => {
+ let is_scalar = state.is_scalar.replace(arg_mask == 0);
+ show_type(state, t);
+ state.is_scalar.set(is_scalar);
+ array_constructor = t.array_sizes.is_some();
+ }
+ hir::FunIdentifier::Identifier(name) => {
+ if state.output_cxx {
+ let sym = state.hir.sym(*name);
+ match &sym.decl {
+ hir::SymDecl::NativeFunction(..) => {
+ if sym.name == "texelFetchOffset" && args.len() >= 4 {
+ if let Some((sampler, base, x, y)) = hir::get_texel_fetch_offset(
+ &state.hir, &args[0], &args[1], &args[3],
+ ) {
+ let base_sym = state.hir.sym(base);
+ let sampler_sym = state.hir.sym(sampler);
+ add_used_global(state, &sampler);
+ if let hir::SymDecl::Global(..) = &base_sym.decl {
+ add_used_global(state, &base);
+ }
+ write!(
+ state,
+ "texelFetchUnchecked({}, {}_{}_fetch, {}, {})",
+ sampler_sym.name,
+ sampler_sym.name,
+ base_sym.name,
+ x,
+ y,
+ );
+ return;
+ }
+ }
+ show_sym(state, name)
+ }
+ hir::SymDecl::UserFunction(ref fd, ref _run_class) => {
+ if (state.mask.is_some() || state.return_declared) &&
+ !fd.globals.is_empty()
+ {
+ cond_mask |= 1 << 31;
+ }
+ let mut param_mask: u32 = 0;
+ for (idx, (param, e)) in
+ fd.prototype.parameters.iter().zip(args.iter()).enumerate()
+ {
+ if let hir::FunctionParameterDeclaration::Named(qual, p) = param
+ {
+ if symbol_run_class(&state.hir.sym(p.sym).decl, arg_mask)
+ == hir::RunClass::Vector
+ {
+ param_mask |= 1 << idx;
+ }
+ match qual {
+ Some(hir::ParameterQualifier::InOut)
+ | Some(hir::ParameterQualifier::Out) => {
+ if state.mask.is_some() || state.return_declared {
+ cond_mask |= 1 << idx;
+ }
+ if (!arg_mask & param_mask & (1 << idx)) != 0 {
+ if adapt_mask == 0 {
+ state.write(if top_level {
+ "{ "
+ } else {
+ "({ "
+ });
+ }
+ show_type(state, &p.ty);
+ write!(state, " _arg{}_ = ", idx);
+ show_hir_expr(state, e);
+ state.write("; ");
+ adapt_mask |= 1 << idx;
+ }
+ }
+ _ => {}
+ }
+ }
+ }
+ if adapt_mask != 0 &&
+ fd.prototype.ty.kind != hir::TypeKind::Void &&
+ !top_level
+ {
+ state.write("auto _ret_ = ");
+ has_ret = true;
+ }
+ show_sym(state, name);
+ let mut deps = state.deps.borrow_mut();
+ let dep_key = (
+ *name,
+ if cond_mask != 0 {
+ param_mask | (1 << 31)
+ } else {
+ param_mask
+ },
+ );
+ if !deps.contains(&dep_key) {
+ deps.push(dep_key);
+ }
+ }
+ hir::SymDecl::Struct(..) => {
+ show_sym(state, name);
+ if arg_mask == 0 {
+ state.write("_scalar");
+ }
+ }
+ _ => panic!("bad identifier to function call"),
+ }
+ }
+ }
+ }
+
+ if array_constructor {
+ state.write("{{");
+ } else {
+ state.write("(");
+ }
+
+ for (idx, e) in args.iter().enumerate() {
+ if idx != 0 {
+ state.write(", ");
+ }
+ if (adapt_mask & (1 << idx)) != 0 {
+ write!(state, "_arg{}_", idx);
+ } else {
+ show_hir_expr(state, e);
+ }
+ }
+
+ if cond_mask != 0 {
+ if !args.is_empty() {
+ state.write(", ");
+ }
+ if let Some(mask) = &state.mask {
+ if state.return_declared {
+ state.write("(");
+ show_hir_expr(state, mask);
+ state.write(")&ret_mask");
+ } else {
+ show_hir_expr(state, mask);
+ }
+ } else if state.return_declared {
+ state.write("ret_mask");
+ } else {
+ state.write("~0");
+ }
+ }
+
+ if array_constructor {
+ state.write("}}");
+ } else {
+ state.write(")");
+ }
+
+ if adapt_mask != 0 {
+ state.write("; ");
+ for (idx, e) in args.iter().enumerate() {
+ if (adapt_mask & (1 << idx)) != 0 {
+ state.is_lval.set(true);
+ show_hir_expr(state, e);
+ state.is_lval.set(false);
+ write!(state, " = force_scalar(_arg{}_); ", idx);
+ }
+ }
+ if has_ret {
+ state.write("_ret_; })");
+ } else {
+ state.write(if top_level { "}" } else { "})" });
+ }
+ }
+ }
+ hir::ExprKind::Dot(ref e, ref i) => {
+ state.write("(");
+ show_hir_expr(state, &e);
+ state.write(")");
+ state.write(".");
+ show_identifier(state, i);
+ }
+ hir::ExprKind::SwizzleSelector(ref e, ref s) => {
+ if state.output_cxx {
+ if let hir::ExprKind::Variable(ref sym) = &e.kind {
+ if state.hir.sym(*sym).name == "gl_FragCoord" {
+ state.used_fragcoord.set(
+ s.components.iter().fold(
+ state.used_fragcoord.get(),
+ |used, c| used | (1 << c)));
+ }
+ }
+ state.write("(");
+ show_hir_expr(state, &e);
+ if state.is_lval.get() && s.components.len() > 1 {
+ state.write(").lsel(");
+ } else {
+ state.write(").sel(");
+ }
+ state.write(&s.to_args());
+ state.write(")");
+ } else {
+ state.write("(");
+ show_hir_expr(state, &e);
+ state.write(")");
+ state.write(".");
+ state.write(&s.to_string());
+ }
+ }
+ hir::ExprKind::PostInc(ref e) => {
+ show_hir_expr(state, &e);
+ state.write("++");
+ }
+ hir::ExprKind::PostDec(ref e) => {
+ show_hir_expr(state, &e);
+ state.write("--");
+ }
+ hir::ExprKind::Comma(ref a, ref b) => {
+ show_hir_expr(state, &a);
+ state.write(", ");
+ show_hir_expr(state, &b);
+ }
+ hir::ExprKind::Cond(index, _) => {
+ write!(state, "_c{}_", index);
+ }
+ hir::ExprKind::CondMask => {
+ state.write("_cond_mask_");
+ }
+ }
+}
+
+pub fn show_expr(state: &OutputState, expr: &syntax::Expr) {
+ match *expr {
+ syntax::Expr::Variable(ref i) => show_identifier(state, &i),
+ syntax::Expr::IntConst(ref x) => {
+ let _ = write!(state, "{}", x);
+ }
+ syntax::Expr::UIntConst(ref x) => {
+ let _ = write!(state, "{}u", x);
+ }
+ syntax::Expr::BoolConst(ref x) => {
+ let _ = write!(state, "{}", x);
+ }
+ syntax::Expr::FloatConst(ref x) => show_float(state, *x),
+ syntax::Expr::DoubleConst(ref x) => show_double(state, *x),
+ syntax::Expr::Unary(ref op, ref e) => {
+ show_unary_op(state, &op);
+ state.write("(");
+ show_expr(state, &e);
+ state.write(")");
+ }
+ syntax::Expr::Binary(ref op, ref l, ref r) => {
+ state.write("(");
+ show_expr(state, &l);
+ state.write(")");
+ show_binary_op(state, &op);
+ state.write("(");
+ show_expr(state, &r);
+ state.write(")");
+ }
+ syntax::Expr::Ternary(ref c, ref s, ref e) => {
+ show_expr(state, &c);
+ state.write(" ? ");
+ show_expr(state, &s);
+ state.write(" : ");
+ show_expr(state, &e);
+ }
+ syntax::Expr::Assignment(ref v, ref op, ref e) => {
+ show_expr(state, &v);
+ state.write(" ");
+ show_assignment_op(state, &op);
+ state.write(" ");
+ show_expr(state, &e);
+ }
+ syntax::Expr::Bracket(ref e, ref a) => {
+ show_expr(state, &e);
+ show_array_spec(state, &a);
+ }
+ syntax::Expr::FunCall(ref fun, ref args) => {
+ show_function_identifier(state, &fun);
+ state.write("(");
+
+ if !args.is_empty() {
+ let mut args_iter = args.iter();
+ let first = args_iter.next().unwrap();
+ show_expr(state, first);
+
+ for e in args_iter {
+ state.write(", ");
+ show_expr(state, e);
+ }
+ }
+
+ state.write(")");
+ }
+ syntax::Expr::Dot(ref e, ref i) => {
+ state.write("(");
+ show_expr(state, &e);
+ state.write(")");
+ state.write(".");
+ show_identifier(state, &i);
+ }
+ syntax::Expr::PostInc(ref e) => {
+ show_expr(state, &e);
+ state.write("++");
+ }
+ syntax::Expr::PostDec(ref e) => {
+ show_expr(state, &e);
+ state.write("--");
+ }
+ syntax::Expr::Comma(ref a, ref b) => {
+ show_expr(state, &a);
+ state.write(", ");
+ show_expr(state, &b);
+ }
+ }
+}
+
+pub fn show_unary_op(state: &OutputState, op: &syntax::UnaryOp) {
+ match *op {
+ syntax::UnaryOp::Inc => {
+ state.write("++");
+ }
+ syntax::UnaryOp::Dec => {
+ state.write("--");
+ }
+ syntax::UnaryOp::Add => {
+ state.write("+");
+ }
+ syntax::UnaryOp::Minus => {
+ state.write("-");
+ }
+ syntax::UnaryOp::Not => {
+ state.write("!");
+ }
+ syntax::UnaryOp::Complement => {
+ state.write("~");
+ }
+ }
+}
+
+pub fn show_binary_op(state: &OutputState, op: &syntax::BinaryOp) {
+ match *op {
+ syntax::BinaryOp::Or => {
+ state.write("||");
+ }
+ syntax::BinaryOp::Xor => {
+ state.write("^^");
+ }
+ syntax::BinaryOp::And => {
+ state.write("&&");
+ }
+ syntax::BinaryOp::BitOr => {
+ state.write("|");
+ }
+ syntax::BinaryOp::BitXor => {
+ state.write("^");
+ }
+ syntax::BinaryOp::BitAnd => {
+ state.write("&");
+ }
+ syntax::BinaryOp::Equal => {
+ state.write("==");
+ }
+ syntax::BinaryOp::NonEqual => {
+ state.write("!=");
+ }
+ syntax::BinaryOp::LT => {
+ state.write("<");
+ }
+ syntax::BinaryOp::GT => {
+ state.write(">");
+ }
+ syntax::BinaryOp::LTE => {
+ state.write("<=");
+ }
+ syntax::BinaryOp::GTE => {
+ state.write(">=");
+ }
+ syntax::BinaryOp::LShift => {
+ state.write("<<");
+ }
+ syntax::BinaryOp::RShift => {
+ state.write(">>");
+ }
+ syntax::BinaryOp::Add => {
+ state.write("+");
+ }
+ syntax::BinaryOp::Sub => {
+ state.write("-");
+ }
+ syntax::BinaryOp::Mult => {
+ state.write("*");
+ }
+ syntax::BinaryOp::Div => {
+ state.write("/");
+ }
+ syntax::BinaryOp::Mod => {
+ state.write("%");
+ }
+ }
+}
+
+pub fn show_assignment_op(state: &OutputState, op: &syntax::AssignmentOp) {
+ match *op {
+ syntax::AssignmentOp::Equal => {
+ state.write("=");
+ }
+ syntax::AssignmentOp::Mult => {
+ state.write("*=");
+ }
+ syntax::AssignmentOp::Div => {
+ state.write("/=");
+ }
+ syntax::AssignmentOp::Mod => {
+ state.write("%=");
+ }
+ syntax::AssignmentOp::Add => {
+ state.write("+=");
+ }
+ syntax::AssignmentOp::Sub => {
+ state.write("-=");
+ }
+ syntax::AssignmentOp::LShift => {
+ state.write("<<=");
+ }
+ syntax::AssignmentOp::RShift => {
+ state.write(">>=");
+ }
+ syntax::AssignmentOp::And => {
+ state.write("&=");
+ }
+ syntax::AssignmentOp::Xor => {
+ state.write("^=");
+ }
+ syntax::AssignmentOp::Or => {
+ state.write("|=");
+ }
+ }
+}
+
+pub fn show_function_identifier(state: &OutputState, i: &syntax::FunIdentifier) {
+ match *i {
+ syntax::FunIdentifier::Identifier(ref n) => show_identifier(state, &n),
+ syntax::FunIdentifier::Expr(ref e) => show_expr(state, &*e),
+ }
+}
+
+pub fn show_hir_function_identifier(state: &OutputState, i: &hir::FunIdentifier) {
+ match *i {
+ hir::FunIdentifier::Identifier(ref n) => show_sym(state, n),
+ hir::FunIdentifier::Constructor(ref t) => show_type(state, &*t),
+ }
+}
+
+pub fn show_declaration(state: &mut OutputState, d: &hir::Declaration) {
+ show_indent(state);
+ match *d {
+ hir::Declaration::FunctionPrototype(ref proto) => {
+ if !state.output_cxx {
+ show_function_prototype(state, &proto);
+ state.write(";\n");
+ }
+ }
+ hir::Declaration::InitDeclaratorList(ref list) => {
+ show_init_declarator_list(state, &list);
+ state.write(";\n");
+
+ if state.output_cxx {
+ let base = list.head.name;
+ let base_sym = state.hir.sym(base);
+ if let hir::SymDecl::Local(..) = &base_sym.decl {
+ let mut texel_fetches = state.texel_fetches.borrow_mut();
+ while let Some(idx) = texel_fetches.iter().position(|&(_, b, _)| b == base)
+ {
+ let (sampler, _, offsets) = texel_fetches.remove(idx);
+ let sampler_sym = state.hir.sym(sampler);
+ define_texel_fetch_ptr(state, &base_sym, &sampler_sym, &offsets);
+ }
+ }
+ }
+ }
+ hir::Declaration::Precision(ref qual, ref ty) => {
+ if !state.output_cxx {
+ show_precision_qualifier(state, &qual);
+ show_type_specifier(state, &ty);
+ state.write(";\n");
+ }
+ }
+ hir::Declaration::Block(ref _block) => {
+ panic!();
+ //show_block(state, &block);
+ //state.write(";\n");
+ }
+ hir::Declaration::Global(ref qual, ref identifiers) => {
+ show_type_qualifier(state, &qual);
+
+ if !identifiers.is_empty() {
+ let mut iter = identifiers.iter();
+ let first = iter.next().unwrap();
+ show_identifier(state, first);
+
+ for identifier in iter {
+ let _ = write!(state, ", {}", identifier);
+ }
+ }
+
+ state.write(";\n");
+ }
+ hir::Declaration::StructDefinition(ref sym) => {
+ show_sym_decl(state, sym);
+
+ state.write(";\n");
+ }
+ }
+}
+
+pub fn show_function_prototype(state: &mut OutputState, fp: &hir::FunctionPrototype) {
+ let is_scalar = state.is_scalar.replace(!state.return_vector);
+ show_type(state, &fp.ty);
+ state.is_scalar.set(is_scalar);
+
+ state.write(" ");
+ show_identifier(state, &fp.name);
+
+ state.write("(");
+
+ if !fp.parameters.is_empty() {
+ let mut iter = fp.parameters.iter();
+ let first = iter.next().unwrap();
+ show_function_parameter_declaration(state, first);
+
+ for param in iter {
+ state.write(", ");
+ show_function_parameter_declaration(state, param);
+ }
+ }
+
+ if state.output_cxx && (state.vector_mask & (1 << 31)) != 0 {
+ if !fp.parameters.is_empty() {
+ state.write(", ");
+ }
+ state.write("I32 _cond_mask_");
+ }
+
+ state.write(")");
+}
+
+pub fn show_function_parameter_declaration(
+ state: &mut OutputState,
+ p: &hir::FunctionParameterDeclaration,
+) {
+ match *p {
+ hir::FunctionParameterDeclaration::Named(ref qual, ref fpd) => {
+ if state.output_cxx {
+ let is_scalar = state.is_scalar.replace(
+ symbol_run_class(&state.hir.sym(fpd.sym).decl, state.vector_mask)
+ == hir::RunClass::Scalar,
+ );
+ show_type(state, &fpd.ty);
+ state.is_scalar.set(is_scalar);
+ show_parameter_qualifier(state, qual);
+ } else {
+ show_parameter_qualifier(state, qual);
+ state.write(" ");
+ show_type(state, &fpd.ty);
+ }
+ state.write(" ");
+ show_identifier_and_type(state, &fpd.name, &fpd.ty);
+ }
+ hir::FunctionParameterDeclaration::Unnamed(ref qual, ref ty) => {
+ if state.output_cxx {
+ show_type_specifier(state, ty);
+ show_parameter_qualifier(state, qual);
+ } else {
+ show_parameter_qualifier(state, qual);
+ state.write(" ");
+ show_type_specifier(state, ty);
+ }
+ }
+ }
+}
+
+pub fn show_init_declarator_list(state: &mut OutputState, i: &hir::InitDeclaratorList) {
+ show_single_declaration(state, &i.head);
+
+ for decl in &i.tail {
+ state.write(", ");
+ show_single_declaration_no_type(state, decl);
+ }
+}
+
+pub fn show_single_declaration(state: &mut OutputState, d: &hir::SingleDeclaration) {
+ if state.output_cxx {
+ show_single_declaration_cxx(state, d)
+ } else {
+ show_single_declaration_glsl(state, d)
+ }
+}
+
+pub fn show_single_declaration_glsl(state: &mut OutputState, d: &hir::SingleDeclaration) {
+ if let Some(ref qual) = d.qualifier {
+ show_type_qualifier(state, &qual);
+ state.write(" ");
+ }
+
+ let sym = state.hir.sym(d.name);
+ match &sym.decl {
+ hir::SymDecl::Global(storage, interpolation, ..) => {
+ show_storage_class(state, storage);
+ if let Some(i) = interpolation {
+ show_interpolation_qualifier(state, i);
+ }
+ }
+ hir::SymDecl::Local(storage, ..) => show_storage_class(state, storage),
+ _ => panic!("should be variable"),
+ }
+
+ if let Some(ty_def) = d.ty_def {
+ show_sym_decl(state, &ty_def);
+ } else {
+ show_type(state, &d.ty);
+ }
+
+ state.write(" ");
+ state.write(sym.name.as_str());
+
+ if let Some(ref arr_spec) = d.ty.array_sizes {
+ show_array_sizes(state, &arr_spec);
+ }
+
+ if let Some(ref initializer) = d.initializer {
+ state.write(" = ");
+ show_initializer(state, initializer);
+ }
+}
+
+fn symbol_run_class(decl: &hir::SymDecl, vector_mask: u32) -> hir::RunClass {
+ let run_class = match decl {
+ hir::SymDecl::Global(_, _, _, run_class) => *run_class,
+ hir::SymDecl::Local(_, _, run_class) => *run_class,
+ _ => hir::RunClass::Vector,
+ };
+ match run_class {
+ hir::RunClass::Scalar => hir::RunClass::Scalar,
+ hir::RunClass::Dependent(mask) => {
+ if (mask & vector_mask) != 0 {
+ hir::RunClass::Vector
+ } else {
+ hir::RunClass::Scalar
+ }
+ }
+ _ => hir::RunClass::Vector,
+ }
+}
+
+pub fn show_single_declaration_cxx(state: &mut OutputState, d: &hir::SingleDeclaration) {
+ let sym = state.hir.sym(d.name);
+ if state.kind == ShaderKind::Vertex {
+ match &sym.decl {
+ hir::SymDecl::Global(hir::StorageClass::Uniform, ..) |
+ hir::SymDecl::Global(hir::StorageClass::Sampler(_), ..) |
+ hir::SymDecl::Global(hir::StorageClass::Out, _, _, hir::RunClass::Scalar) => {
+ state.write("// ");
+ }
+ _ => {}
+ }
+ } else {
+ match &sym.decl {
+ hir::SymDecl::Global(hir::StorageClass::FragColor(index), ..) => {
+ let fragcolor = match index {
+ 0 => "gl_FragColor",
+ 1 => "gl_SecondaryFragColor",
+ _ => panic!(),
+ };
+ write!(state, "#define {} {}\n", sym.name, fragcolor);
+ show_indent(state);
+ state.write("// ");
+ }
+ hir::SymDecl::Global(hir::StorageClass::Out, ..) => {
+ write!(state, "#define {} gl_FragColor\n", sym.name);
+ show_indent(state);
+ state.write("// ");
+ }
+ hir::SymDecl::Global(hir::StorageClass::Uniform, ..) |
+ hir::SymDecl::Global(hir::StorageClass::Sampler(_), ..) |
+ hir::SymDecl::Global(hir::StorageClass::In, _, _, hir::RunClass::Scalar) => {
+ state.write("// ");
+ }
+ _ => {}
+ }
+ }
+ let is_scalar = state
+ .is_scalar
+ .replace(symbol_run_class(&sym.decl, state.vector_mask) == hir::RunClass::Scalar);
+
+ if let Some(ref _array) = d.ty.array_sizes {
+ show_type(state, &d.ty);
+ } else {
+ if let Some(ty_def) = d.ty_def {
+ show_sym_decl(state, &ty_def);
+ } else {
+ show_type(state, &d.ty);
+ }
+ }
+
+ // XXX: this is pretty grotty
+ state.write(" ");
+ show_sym_decl(state, &d.name);
+
+ state.is_scalar.set(is_scalar);
+
+ if let Some(ref initializer) = d.initializer {
+ state.write(" = ");
+ show_initializer(state, initializer);
+ }
+}
+
+pub fn show_single_declaration_no_type(state: &OutputState, d: &hir::SingleDeclarationNoType) {
+ show_arrayed_identifier(state, &d.ident);
+
+ if let Some(ref initializer) = d.initializer {
+ state.write(" = ");
+ show_initializer(state, initializer);
+ }
+}
+
+pub fn show_initializer(state: &OutputState, i: &hir::Initializer) {
+ match *i {
+ hir::Initializer::Simple(ref e) => show_hir_expr(state, e),
+ hir::Initializer::List(ref list) => {
+ let mut iter = list.0.iter();
+ let first = iter.next().unwrap();
+
+ state.write("{ ");
+ show_initializer(state, first);
+
+ for ini in iter {
+ state.write(", ");
+ show_initializer(state, ini);
+ }
+
+ state.write(" }");
+ }
+ }
+}
+
+/*
+pub fn show_block(state: &mut OutputState, b: &hir::Block) {
+ show_type_qualifier(state, &b.qualifier);
+ state.write(" ");
+ show_identifier(state, &b.name);
+ state.write(" {");
+
+ for field in &b.fields {
+ show_struct_field(state, field);
+ state.write("\n");
+ }
+ state.write("}");
+
+ if let Some(ref ident) = b.identifier {
+ show_arrayed_identifier(state, ident);
+ }
+}
+*/
+
+// This is a hack to run through the first time with an empty writter to find if 'return' is declared.
+pub fn has_conditional_return(state: &mut OutputState, cst: &hir::CompoundStatement) -> bool {
+ let buffer = state.push_buffer();
+ show_compound_statement(state, cst);
+ state.pop_buffer(buffer);
+ let result = state.return_declared;
+ state.return_declared = false;
+ result
+}
+
+fn define_texel_fetch_ptr(
+ state: &OutputState,
+ base_sym: &hir::Symbol,
+ sampler_sym: &hir::Symbol,
+ offsets: &hir::TexelFetchOffsets,
+) {
+ show_indent(state);
+ let ptr_type = if let hir::SymDecl::Global(_, _, ty, _) = &sampler_sym.decl {
+ if symbol_run_class(&base_sym.decl, state.vector_mask) == hir::RunClass::Scalar {
+ match ty.kind {
+ hir::TypeKind::Sampler2D
+ | hir::TypeKind::Sampler2DRect => "vec4_scalar*",
+ hir::TypeKind::ISampler2D => "ivec4_scalar*",
+ _ => panic!(),
+ }
+ } else {
+ "I32"
+ }
+ } else {
+ panic!();
+ };
+ write!(
+ state,
+ "{} {}_{}_fetch = texelFetchPtr({}, {}, {}, {}, {}, {});\n",
+ ptr_type,
+ sampler_sym.name,
+ base_sym.name,
+ sampler_sym.name,
+ base_sym.name,
+ offsets.min_x,
+ offsets.max_x,
+ offsets.min_y,
+ offsets.max_y,
+ );
+}
+
+pub fn show_function_definition(
+ state: &mut OutputState,
+ fd: &hir::FunctionDefinition,
+ vector_mask: u32,
+) {
+ // println!("start {:?} {:?}", fd.prototype.name, vector_mask);
+ if state.output_cxx && fd.prototype.name.as_str() == "main" {
+ state.write("ALWAYS_INLINE ");
+ }
+ show_function_prototype(state, &fd.prototype);
+ state.write(" ");
+ state.return_type = Some(Box::new(fd.prototype.ty.clone()));
+
+ if state.output_cxx && (vector_mask & (1 << 31)) != 0 {
+ state.mask = Some(Box::new(hir::Expr {
+ kind: hir::ExprKind::CondMask,
+ ty: hir::Type::new(hir::TypeKind::Bool),
+ }));
+ }
+
+ show_indent(state);
+ state.write("{\n");
+
+ state.indent();
+ if has_conditional_return(state, &fd.body) {
+ show_indent(state);
+ state.write(if state.return_vector {
+ "I32"
+ } else {
+ "int32_t"
+ });
+ state.write(" ret_mask = ");
+ if let Some(mask) = &state.mask {
+ show_hir_expr(state, mask);
+ } else {
+ state.write("~0");
+ }
+ state.write(";\n");
+ // XXX: the cloning here is bad
+ show_indent(state);
+ if fd.prototype.ty != Type::new(hir::TypeKind::Void) {
+ let is_scalar = state.is_scalar.replace(!state.return_vector);
+ show_type(state, &state.return_type.clone().unwrap());
+ state.write(" ret;\n");
+ state.is_scalar.set(is_scalar);
+ }
+ }
+
+ if state.output_cxx {
+ match fd.prototype.name.as_str() {
+ "swgl_drawSpanRGBA8" |
+ "swgl_drawSpanR8" => {
+ // Partial spans are not drawn using span shaders, but rather drawn with a fragment shader
+ // where the span shader left off. We need to undo any changes to the interpolants made by
+ // the span shaders so that we can reset the interpolants to where the fragment shader
+ // expects them. We do this by saving them in an _Undo_ struct on entry to the span shader,
+ // and then restore them in the _Undo_ struct destructor.
+ let mut needs_undo = vec![];
+ for global in &fd.globals {
+ let sym = state.hir.sym(*global);
+ match &sym.decl {
+ hir::SymDecl::Global(hir::StorageClass::In, _, ty, hir::RunClass::Vector) => {
+ if needs_undo.is_empty() {
+ state.write("struct _Undo_ {\nSelf* self;\n");
+ }
+ show_type(state, ty);
+ write!(state, " {};\n", sym.name);
+ needs_undo.push(sym.name.clone());
+ }
+ _ => {}
+ }
+ }
+ if !needs_undo.is_empty() {
+ state.write("explicit _Undo_(Self* self) : self(self)");
+ for name in &needs_undo {
+ write!(state, ", {0}(self->{0})", name);
+ }
+ state.write(" {}\n");
+ state.write("~_Undo_() {\n");
+ for name in &needs_undo {
+ write!(state, "self->{0} = {0};\n", name);
+ }
+ state.write("}} _undo_(this);\n");
+ }
+ }
+ _ => {}
+ }
+
+ let mut texel_fetches = state.texel_fetches.borrow_mut();
+ texel_fetches.clear();
+ for ((sampler, base), offsets) in fd.texel_fetches.iter() {
+ add_used_global(state, sampler);
+ let sampler_sym = state.hir.sym(*sampler);
+ let base_sym = state.hir.sym(*base);
+ match &base_sym.decl {
+ hir::SymDecl::Global(..) => {
+ add_used_global(state, base);
+ define_texel_fetch_ptr(state, &base_sym, &sampler_sym, &offsets);
+ }
+ hir::SymDecl::Local(..) => {
+ if fd.prototype.has_parameter(*base) {
+ define_texel_fetch_ptr(state, &base_sym, &sampler_sym, &offsets);
+ } else {
+ texel_fetches.push((*sampler, *base, offsets.clone()));
+ }
+ }
+ _ => panic!(),
+ }
+ }
+ }
+
+ for st in &fd.body.statement_list {
+ show_statement(state, st);
+ }
+
+ if state.return_declared {
+ show_indent(state);
+ if fd.prototype.ty == Type::new(hir::TypeKind::Void) {
+ state.write("return;\n");
+ } else {
+ state.write("return ret;\n");
+ }
+ }
+ state.outdent();
+
+ show_indent(state);
+ state.write("}\n");
+ // println!("end {:?}", fd.prototype.name);
+
+ state.return_type = None;
+ state.return_declared = false;
+ state.mask = None;
+}
+
+pub fn show_compound_statement(state: &mut OutputState, cst: &hir::CompoundStatement) {
+ show_indent(state);
+ state.write("{\n");
+
+ state.indent();
+ for st in &cst.statement_list {
+ show_statement(state, st);
+ }
+ state.outdent();
+
+ show_indent(state);
+ state.write("}\n");
+}
+
+pub fn show_statement(state: &mut OutputState, st: &hir::Statement) {
+ match *st {
+ hir::Statement::Compound(ref cst) => show_compound_statement(state, cst),
+ hir::Statement::Simple(ref sst) => show_simple_statement(state, sst),
+ }
+}
+
+pub fn show_simple_statement(state: &mut OutputState, sst: &hir::SimpleStatement) {
+ match *sst {
+ hir::SimpleStatement::Declaration(ref d) => show_declaration(state, d),
+ hir::SimpleStatement::Expression(ref e) => show_expression_statement(state, e),
+ hir::SimpleStatement::Selection(ref s) => show_selection_statement(state, s),
+ hir::SimpleStatement::Switch(ref s) => show_switch_statement(state, s),
+ hir::SimpleStatement::Iteration(ref i) => show_iteration_statement(state, i),
+ hir::SimpleStatement::Jump(ref j) => show_jump_statement(state, j),
+ }
+}
+
+pub fn show_indent(state: &OutputState) {
+ for _ in 0 .. state.indent {
+ state.write(" ");
+ }
+}
+
+pub fn show_expression_statement(state: &mut OutputState, est: &hir::ExprStatement) {
+ show_indent(state);
+
+ if let Some(ref e) = *est {
+ show_hir_expr_inner(state, e, true);
+ }
+
+ state.write(";\n");
+}
+
+pub fn show_selection_statement(state: &mut OutputState, sst: &hir::SelectionStatement) {
+ show_indent(state);
+
+ if state.output_cxx &&
+ (state.return_declared || expr_run_class(state, &sst.cond) != hir::RunClass::Scalar)
+ {
+ let (cond_index, mask) = if state.mask.is_none() || sst.else_stmt.is_some() {
+ let cond = sst.cond.clone();
+ state.cond_index += 1;
+ let cond_index = state.cond_index;
+ write!(state, "auto _c{}_ = ", cond_index);
+ show_hir_expr(state, &cond);
+ state.write(";\n");
+ (
+ cond_index,
+ Box::new(hir::Expr {
+ kind: hir::ExprKind::Cond(cond_index, cond),
+ ty: hir::Type::new(hir::TypeKind::Bool),
+ }),
+ )
+ } else {
+ (0, sst.cond.clone())
+ };
+
+ let previous = mem::replace(&mut state.mask, None);
+ state.mask = Some(match previous.clone() {
+ Some(e) => {
+ let cond = Box::new(hir::Expr {
+ kind: hir::ExprKind::Binary(syntax::BinaryOp::BitAnd, e, mask.clone()),
+ ty: hir::Type::new(hir::TypeKind::Bool),
+ });
+ state.cond_index += 1;
+ let nested_cond_index = state.cond_index;
+ show_indent(state);
+ write!(state, "auto _c{}_ = ", nested_cond_index);
+ show_hir_expr(state, &cond);
+ state.write(";\n");
+ Box::new(hir::Expr {
+ kind: hir::ExprKind::Cond(nested_cond_index, cond),
+ ty: hir::Type::new(hir::TypeKind::Bool),
+ })
+ }
+ None => mask.clone(),
+ });
+
+ show_statement(state, &sst.body);
+ state.mask = previous;
+
+ if let Some(rest) = &sst.else_stmt {
+ // invert the condition
+ let inverted_cond = Box::new(hir::Expr {
+ kind: hir::ExprKind::Unary(UnaryOp::Complement, mask),
+ ty: hir::Type::new(hir::TypeKind::Bool),
+ });
+ let previous = mem::replace(&mut state.mask, None);
+ state.mask = Some(match previous.clone() {
+ Some(e) => {
+ let cond = Box::new(hir::Expr {
+ kind: hir::ExprKind::Binary(syntax::BinaryOp::BitAnd, e, inverted_cond),
+ ty: hir::Type::new(hir::TypeKind::Bool),
+ });
+ show_indent(state);
+ write!(state, "_c{}_ = ", cond_index);
+ show_hir_expr(state, &cond);
+ state.write(";\n");
+ Box::new(hir::Expr {
+ kind: hir::ExprKind::Cond(cond_index, cond),
+ ty: hir::Type::new(hir::TypeKind::Bool),
+ })
+ }
+ None => inverted_cond,
+ });
+
+ show_statement(state, rest);
+ state.mask = previous;
+ }
+ } else {
+ state.write("if (");
+ show_hir_expr(state, &sst.cond);
+ state.write(") {\n");
+
+ state.indent();
+ show_statement(state, &sst.body);
+ state.outdent();
+
+ show_indent(state);
+ if let Some(rest) = &sst.else_stmt {
+ state.write("} else ");
+ show_statement(state, rest);
+ } else {
+ state.write("}\n");
+ }
+ }
+}
+
+fn case_stmts_to_if_stmts(stmts: &[Statement], last: bool) -> (Option<Box<Statement>>, bool) {
+ // Look for jump statements and remove them
+ // We currently are pretty strict on the form that the statement
+ // list needs to be in. This can be loosened as needed.
+ let mut fallthrough = false;
+ let cstmt = match &stmts[..] {
+ [hir::Statement::Compound(c)] => match c.statement_list.split_last() {
+ Some((hir::Statement::Simple(s), rest)) => match **s {
+ hir::SimpleStatement::Jump(hir::JumpStatement::Break) => hir::CompoundStatement {
+ statement_list: rest.to_owned(),
+ },
+ _ => panic!("fall through not supported"),
+ },
+ _ => panic!("empty compound"),
+ },
+ [hir::Statement::Simple(s)] => {
+ match **s {
+ hir::SimpleStatement::Jump(hir::JumpStatement::Break) => hir::CompoundStatement {
+ statement_list: Vec::new(),
+ },
+ _ => {
+ if last {
+ // we don't need a break at the end
+ hir::CompoundStatement {
+ statement_list: vec![hir::Statement::Simple(s.clone())],
+ }
+ } else {
+ panic!("fall through not supported {:?}", s)
+ }
+ }
+ }
+ }
+ [] => return (None, true),
+ stmts => match stmts.split_last() {
+ Some((hir::Statement::Simple(s), rest)) => match **s {
+ hir::SimpleStatement::Jump(hir::JumpStatement::Break) => hir::CompoundStatement {
+ statement_list: rest.to_owned(),
+ },
+ _ => {
+ if !last {
+ fallthrough = true;
+ }
+ hir::CompoundStatement {
+ statement_list: stmts.to_owned(),
+ }
+ }
+ },
+ _ => panic!("unexpected empty"),
+ },
+ };
+ let stmts = Box::new(hir::Statement::Compound(Box::new(cstmt)));
+ (Some(stmts), fallthrough)
+}
+
+fn build_selection<'a, I: Iterator<Item = &'a hir::Case>>(
+ head: &Box<hir::Expr>,
+ case: &hir::Case,
+ mut cases: I,
+ default: Option<&hir::Case>,
+ previous_condition: Option<Box<hir::Expr>>,
+ previous_stmts: Option<Box<hir::Statement>>,
+) -> hir::SelectionStatement {
+ let cond = match &case.label {
+ hir::CaseLabel::Case(e) => Some(Box::new(hir::Expr {
+ kind: hir::ExprKind::Binary(syntax::BinaryOp::Equal, head.clone(), e.clone()),
+ ty: hir::Type::new(hir::TypeKind::Bool),
+ })),
+ hir::CaseLabel::Def => None,
+ };
+
+ // if we have two conditions join them
+ let cond = match (&previous_condition, &cond) {
+ (Some(prev), Some(cond)) => Some(Box::new(hir::Expr {
+ kind: hir::ExprKind::Binary(syntax::BinaryOp::Or, prev.clone(), cond.clone()),
+ ty: hir::Type::new(hir::TypeKind::Bool),
+ })),
+ (_, cond) => cond.clone(),
+ };
+
+ /*
+
+ // find the next case that's not a default
+ let next_case = loop {
+ match cases.next() {
+ Some(hir::Case { label: hir::CaseLabel::Def, ..}) => { },
+ case => break case,
+ }
+ };*/
+
+ let (cond, body, else_stmt) = match (cond, cases.next()) {
+ (None, Some(next_case)) => {
+ assert!(previous_stmts.is_none());
+ // default so just move on to the next
+ return build_selection(head, next_case, cases, default, None, None);
+ }
+ (Some(cond), Some(next_case)) => {
+ assert!(previous_stmts.is_none());
+ let (stmts, fallthrough) = case_stmts_to_if_stmts(&case.stmts, false);
+ if !fallthrough && stmts.is_some() {
+ (
+ cond,
+ stmts.unwrap(),
+ Some(Box::new(hir::Statement::Simple(Box::new(
+ hir::SimpleStatement::Selection(build_selection(
+ head, next_case, cases, default, None, None,
+ )),
+ )))),
+ )
+ } else {
+ // empty so fall through to the next
+ return build_selection(head, next_case, cases, default, Some(cond), stmts);
+ }
+ }
+ (Some(cond), None) => {
+ // non-default last
+ assert!(previous_stmts.is_none());
+ let (stmts, _) = case_stmts_to_if_stmts(&case.stmts, default.is_none());
+ let stmts = stmts.expect("empty case labels unsupported at the end");
+ // add the default case at the end if we have one
+ (
+ cond,
+ stmts,
+ match default {
+ Some(default) => {
+ let (default_stmts, fallthrough) =
+ case_stmts_to_if_stmts(&default.stmts, true);
+ assert!(!fallthrough);
+ Some(default_stmts.expect("empty default unsupported"))
+ }
+ None => None,
+ },
+ )
+ }
+ (None, None) => {
+ // default, last
+
+ assert!(default.is_some());
+
+ let (stmts, fallthrough) = case_stmts_to_if_stmts(&case.stmts, true);
+ let stmts = stmts.expect("empty default unsupported");
+ assert!(!fallthrough);
+
+ match previous_stmts {
+ Some(previous_stmts) => {
+ let cond = previous_condition.expect("must have previous condition");
+ (cond, previous_stmts, Some(stmts))
+ }
+ None => {
+ let cond = Box::new(hir::Expr {
+ kind: hir::ExprKind::BoolConst(true),
+ ty: hir::Type::new(hir::TypeKind::Bool),
+ });
+ (cond, stmts, None)
+ }
+ }
+ }
+ };
+
+ hir::SelectionStatement {
+ cond,
+ body,
+ else_stmt,
+ }
+}
+
+pub fn lower_switch_to_ifs(sst: &hir::SwitchStatement) -> hir::SelectionStatement {
+ let default = sst.cases.iter().find(|x| x.label == hir::CaseLabel::Def);
+ let mut cases = sst.cases.iter();
+ let r = build_selection(&sst.head, cases.next().unwrap(), cases, default, None, None);
+ r
+}
+
+fn is_declaration(stmt: &hir::Statement) -> bool {
+ if let hir::Statement::Simple(s) = stmt {
+ if let hir::SimpleStatement::Declaration(..) = **s {
+ return true;
+ }
+ }
+ return false;
+}
+
+pub fn show_switch_statement(state: &mut OutputState, sst: &hir::SwitchStatement) {
+ if state.output_cxx && expr_run_class(state, &sst.head) != hir::RunClass::Scalar {
+ // XXX: when lowering switches we end up with a mask that has
+ // a bunch of mutually exclusive conditions.
+ // It would be nice if we could fold them together.
+ let ifs = lower_switch_to_ifs(sst);
+ return show_selection_statement(state, &ifs);
+ }
+
+ show_indent(state);
+ state.write("switch (");
+ show_hir_expr(state, &sst.head);
+ state.write(") {\n");
+ state.indent();
+
+ for case in &sst.cases {
+ show_case_label(state, &case.label);
+ state.indent();
+
+ let has_declaration = case.stmts.iter().any(|x| is_declaration(x));
+ // glsl allows declarations in switch statements while C requires them to be
+ // in a compound statement. If we have a declaration wrap the statements in an block.
+ // This will break some glsl shaders but keeps the saner ones working
+ if has_declaration {
+ show_indent(state);
+ state.write("{\n");
+ state.indent();
+ }
+ for st in &case.stmts {
+ show_statement(state, st);
+ }
+
+ if has_declaration {
+ show_indent(state);
+ state.write("}\n");
+ state.outdent();
+ }
+
+ state.outdent();
+ }
+ state.outdent();
+ show_indent(state);
+ state.write("}\n");
+}
+
+pub fn show_case_label(state: &mut OutputState, cl: &hir::CaseLabel) {
+ show_indent(state);
+ match *cl {
+ hir::CaseLabel::Case(ref e) => {
+ state.write("case ");
+ show_hir_expr(state, e);
+ state.write(":\n");
+ }
+ hir::CaseLabel::Def => {
+ state.write("default:\n");
+ }
+ }
+}
+
+pub fn show_iteration_statement(state: &mut OutputState, ist: &hir::IterationStatement) {
+ show_indent(state);
+ match *ist {
+ hir::IterationStatement::While(ref cond, ref body) => {
+ state.write("while (");
+ show_condition(state, cond);
+ state.write(") ");
+ show_statement(state, body);
+ }
+ hir::IterationStatement::DoWhile(ref body, ref cond) => {
+ state.write("do ");
+ show_statement(state, body);
+ state.write(" while (");
+ show_hir_expr(state, cond);
+ state.write(")\n");
+ }
+ hir::IterationStatement::For(ref init, ref rest, ref body) => {
+ state.write("for (");
+ show_for_init_statement(state, init);
+ show_for_rest_statement(state, rest);
+ state.write(") ");
+ show_statement(state, body);
+ }
+ }
+}
+
+pub fn show_condition(state: &mut OutputState, c: &hir::Condition) {
+ match *c {
+ hir::Condition::Expr(ref e) => show_hir_expr(state, e),
+ /*hir::Condition::Assignment(ref ty, ref name, ref initializer) => {
+ show_type(state, ty);
+ state.write(" ");
+ show_identifier(f, name);
+ state.write(" = ");
+ show_initializer(state, initializer);
+ }*/
+ }
+}
+
+pub fn show_for_init_statement(state: &mut OutputState, i: &hir::ForInitStatement) {
+ match *i {
+ hir::ForInitStatement::Expression(ref expr) => {
+ if let Some(ref e) = *expr {
+ show_hir_expr(state, e);
+ }
+ }
+ hir::ForInitStatement::Declaration(ref d) => {
+ show_declaration(state, d);
+ }
+ }
+}
+
+pub fn show_for_rest_statement(state: &mut OutputState, r: &hir::ForRestStatement) {
+ if let Some(ref cond) = r.condition {
+ show_condition(state, cond);
+ }
+
+ state.write("; ");
+
+ if let Some(ref e) = r.post_expr {
+ show_hir_expr(state, e);
+ }
+}
+
+fn use_return_mask(state: &OutputState) -> bool {
+ if let Some(mask) = &state.mask {
+ mask.kind != hir::ExprKind::CondMask
+ } else {
+ false
+ }
+}
+
+pub fn show_jump_statement(state: &mut OutputState, j: &hir::JumpStatement) {
+ show_indent(state);
+ match *j {
+ hir::JumpStatement::Continue => {
+ state.write("continue;\n");
+ }
+ hir::JumpStatement::Break => {
+ state.write("break;\n");
+ }
+ hir::JumpStatement::Discard => {
+ if state.output_cxx {
+ state.uses_discard = true;
+ if let Some(mask) = &state.mask {
+ state.write("swgl_IsPixelDiscarded |= (");
+ show_hir_expr(state, mask);
+ state.write(")");
+ if state.return_declared {
+ state.write("&ret_mask");
+ }
+ state.write(";\n");
+ } else {
+ state.write("swgl_IsPixelDiscarded = true;\n");
+ }
+ } else {
+ state.write("discard;\n");
+ }
+ }
+ hir::JumpStatement::Return(ref e) => {
+ if let Some(e) = e {
+ if state.output_cxx {
+ if use_return_mask(state) {
+ // We cast any conditions by `ret_mask_type` so that scalars nicely
+ // convert to -1. i.e. I32 &= bool will give the wrong result. while I32 &= I32(bool) works
+ let ret_mask_type = if state.return_vector {
+ "I32"
+ } else {
+ "int32_t"
+ };
+ if state.return_declared {
+ // XXX: the cloning here is bad
+ write!(state, "ret = if_then_else(ret_mask & {}(", ret_mask_type);
+ show_hir_expr(state, &state.mask.clone().unwrap());
+ state.write("), ");
+ show_hir_expr(state, e);
+ state.write(", ret);\n");
+ } else {
+ state.write("ret = ");
+ show_hir_expr(state, e);
+ state.write(";\n");
+ }
+
+ show_indent(state);
+
+ if state.return_declared {
+ write!(state, "ret_mask &= ~{}(", ret_mask_type);
+ } else {
+ write!(state, "ret_mask = ~{}(", ret_mask_type);
+ }
+ show_hir_expr(state, &state.mask.clone().unwrap());
+ state.write(");\n");
+ state.return_declared = true;
+ } else {
+ if state.return_declared {
+ state.write("ret = if_then_else(ret_mask, ");
+ show_hir_expr(state, e);
+ state.write(", ret);\n");
+ } else {
+ state.write("return ");
+ show_hir_expr(state, e);
+ state.write(";\n");
+ }
+ }
+ } else {
+ state.write("return ");
+ show_hir_expr(state, e);
+ state.write(";\n");
+ }
+ } else {
+ if state.output_cxx {
+ if use_return_mask(state) {
+ show_indent(state);
+ let ret_mask_type = if state.return_vector {
+ "I32"
+ } else {
+ "int32_t"
+ };
+ if state.return_declared {
+ write!(state, "ret_mask &= ~{}(", ret_mask_type);
+ } else {
+ write!(state, "ret_mask = ~{}(", ret_mask_type);
+ }
+ show_hir_expr(state, &state.mask.clone().unwrap());
+ state.write(");\n");
+ state.return_declared = true;
+ } else {
+ state.write("return;\n");
+ }
+ } else {
+ state.write("return;\n");
+ }
+ }
+ }
+ }
+}
+
+pub fn show_path(state: &OutputState, path: &syntax::Path) {
+ match path {
+ syntax::Path::Absolute(s) => {
+ let _ = write!(state, "<{}>", s);
+ }
+ syntax::Path::Relative(s) => {
+ let _ = write!(state, "\"{}\"", s);
+ }
+ }
+}
+
+pub fn show_preprocessor(state: &OutputState, pp: &syntax::Preprocessor) {
+ match *pp {
+ syntax::Preprocessor::Define(ref pd) => show_preprocessor_define(state, pd),
+ syntax::Preprocessor::Else => show_preprocessor_else(state),
+ syntax::Preprocessor::ElseIf(ref pei) => show_preprocessor_elseif(state, pei),
+ syntax::Preprocessor::EndIf => show_preprocessor_endif(state),
+ syntax::Preprocessor::Error(ref pe) => show_preprocessor_error(state, pe),
+ syntax::Preprocessor::If(ref pi) => show_preprocessor_if(state, pi),
+ syntax::Preprocessor::IfDef(ref pid) => show_preprocessor_ifdef(state, pid),
+ syntax::Preprocessor::IfNDef(ref pind) => show_preprocessor_ifndef(state, pind),
+ syntax::Preprocessor::Include(ref pi) => show_preprocessor_include(state, pi),
+ syntax::Preprocessor::Line(ref pl) => show_preprocessor_line(state, pl),
+ syntax::Preprocessor::Pragma(ref pp) => show_preprocessor_pragma(state, pp),
+ syntax::Preprocessor::Undef(ref pu) => show_preprocessor_undef(state, pu),
+ syntax::Preprocessor::Version(ref pv) => show_preprocessor_version(state, pv),
+ syntax::Preprocessor::Extension(ref pe) => show_preprocessor_extension(state, pe),
+ }
+}
+
+pub fn show_preprocessor_define(state: &OutputState, pd: &syntax::PreprocessorDefine) {
+ match *pd {
+ syntax::PreprocessorDefine::ObjectLike {
+ ref ident,
+ ref value,
+ } => {
+ let _ = write!(state, "#define {} {}\n", ident, value);
+ }
+
+ syntax::PreprocessorDefine::FunctionLike {
+ ref ident,
+ ref args,
+ ref value,
+ } => {
+ let _ = write!(state, "#define {}(", ident);
+
+ if !args.is_empty() {
+ let _ = write!(state, "{}", &args[0]);
+
+ for arg in &args[1 .. args.len()] {
+ let _ = write!(state, ", {}", arg);
+ }
+ }
+
+ let _ = write!(state, ") {}\n", value);
+ }
+ }
+}
+
+pub fn show_preprocessor_else(state: &OutputState) {
+ state.write("#else\n");
+}
+
+pub fn show_preprocessor_elseif(state: &OutputState, pei: &syntax::PreprocessorElseIf) {
+ let _ = write!(state, "#elseif {}\n", pei.condition);
+}
+
+pub fn show_preprocessor_error(state: &OutputState, pe: &syntax::PreprocessorError) {
+ let _ = writeln!(state, "#error {}", pe.message);
+}
+
+pub fn show_preprocessor_endif(state: &OutputState) {
+ state.write("#endif\n");
+}
+
+pub fn show_preprocessor_if(state: &OutputState, pi: &syntax::PreprocessorIf) {
+ let _ = write!(state, "#if {}\n", pi.condition);
+}
+
+pub fn show_preprocessor_ifdef(state: &OutputState, pid: &syntax::PreprocessorIfDef) {
+ state.write("#ifdef ");
+ show_identifier(state, &pid.ident);
+ state.write("\n");
+}
+
+pub fn show_preprocessor_ifndef(state: &OutputState, pind: &syntax::PreprocessorIfNDef) {
+ state.write("#ifndef ");
+ show_identifier(state, &pind.ident);
+ state.write("\n");
+}
+
+pub fn show_preprocessor_include(state: &OutputState, pi: &syntax::PreprocessorInclude) {
+ state.write("#include ");
+ show_path(state, &pi.path);
+ state.write("\n");
+}
+
+pub fn show_preprocessor_line(state: &OutputState, pl: &syntax::PreprocessorLine) {
+ let _ = write!(state, "#line {}", pl.line);
+ if let Some(source_string_number) = pl.source_string_number {
+ let _ = write!(state, " {}", source_string_number);
+ }
+ state.write("\n");
+}
+
+pub fn show_preprocessor_pragma(state: &OutputState, pp: &syntax::PreprocessorPragma) {
+ let _ = writeln!(state, "#pragma {}", pp.command);
+}
+
+pub fn show_preprocessor_undef(state: &OutputState, pud: &syntax::PreprocessorUndef) {
+ state.write("#undef ");
+ show_identifier(state, &pud.name);
+ state.write("\n");
+}
+
+pub fn show_preprocessor_version(state: &OutputState, pv: &syntax::PreprocessorVersion) {
+ let _ = write!(state, "#version {}", pv.version);
+
+ if let Some(ref profile) = pv.profile {
+ match *profile {
+ syntax::PreprocessorVersionProfile::Core => {
+ state.write(" core");
+ }
+ syntax::PreprocessorVersionProfile::Compatibility => {
+ state.write(" compatibility");
+ }
+ syntax::PreprocessorVersionProfile::ES => {
+ state.write(" es");
+ }
+ }
+ }
+
+ state.write("\n");
+}
+
+pub fn show_preprocessor_extension(state: &OutputState, pe: &syntax::PreprocessorExtension) {
+ state.write("#extension ");
+
+ match pe.name {
+ syntax::PreprocessorExtensionName::All => {
+ state.write("all");
+ }
+ syntax::PreprocessorExtensionName::Specific(ref n) => {
+ state.write(n);
+ }
+ }
+
+ if let Some(ref behavior) = pe.behavior {
+ match *behavior {
+ syntax::PreprocessorExtensionBehavior::Require => {
+ state.write(" : require");
+ }
+ syntax::PreprocessorExtensionBehavior::Enable => {
+ state.write(" : enable");
+ }
+ syntax::PreprocessorExtensionBehavior::Warn => {
+ state.write(" : warn");
+ }
+ syntax::PreprocessorExtensionBehavior::Disable => {
+ state.write(" : disable");
+ }
+ }
+ }
+
+ state.write("\n");
+}
+
+pub fn show_external_declaration(state: &mut OutputState, ed: &hir::ExternalDeclaration) {
+ match *ed {
+ hir::ExternalDeclaration::Preprocessor(ref pp) => {
+ if !state.output_cxx {
+ show_preprocessor(state, pp)
+ }
+ }
+ hir::ExternalDeclaration::FunctionDefinition(ref fd) => {
+ if !state.output_cxx {
+ show_function_definition(state, fd, !0)
+ }
+ }
+ hir::ExternalDeclaration::Declaration(ref d) => show_declaration(state, d),
+ }
+}
+
+pub fn show_cxx_function_definition(state: &mut OutputState, name: hir::SymRef, vector_mask: u32) {
+ if let Some((ref fd, run_class)) = state.hir.function_definition(name) {
+ state.vector_mask = vector_mask;
+ state.return_vector = (vector_mask & (1 << 31)) != 0
+ || match run_class {
+ hir::RunClass::Scalar => false,
+ hir::RunClass::Dependent(mask) => (mask & vector_mask) != 0,
+ _ => true,
+ };
+ match state.functions.get(&(name, vector_mask)) {
+ Some(true) => {}
+ Some(false) => {
+ show_function_prototype(state, &fd.prototype);
+ state.functions.insert((name, vector_mask), true);
+ }
+ None => {
+ state.functions.insert((name, vector_mask), false);
+ let buffer = state.push_buffer();
+ show_function_definition(state, fd, vector_mask);
+ for (name, vector_mask) in state.deps.replace(Vec::new()) {
+ show_cxx_function_definition(state, name, vector_mask);
+ }
+ state.flush_buffer();
+ state.pop_buffer(buffer);
+ state.functions.insert((name, vector_mask), true);
+ }
+ }
+ }
+}
+
+pub fn show_translation_unit(state: &mut OutputState, tu: &hir::TranslationUnit) {
+ state.flush_buffer();
+
+ for ed in &(tu.0).0 {
+ show_external_declaration(state, ed);
+ state.flush_buffer();
+ }
+ if state.output_cxx {
+ for name in &["main", "swgl_drawSpanRGBA8", "swgl_drawSpanR8"] {
+ if let Some(sym) = state.hir.lookup(name) {
+ show_cxx_function_definition(state, sym, 0);
+ state.flush_buffer();
+ }
+ }
+ }
+}
+
+fn write_abi(state: &mut OutputState) {
+ match state.kind {
+ ShaderKind::Fragment => {
+ state.write("static void run(Self *self) {\n");
+ if state.uses_discard {
+ state.write(" self->swgl_IsPixelDiscarded = false;\n");
+ }
+ state.write(" self->main();\n");
+ state.write(" self->step_interp_inputs();\n");
+ state.write("}\n");
+ state.write("static void skip(Self* self, int steps) {\n");
+ state.write(" self->step_interp_inputs(steps);\n");
+ state.write("}\n");
+ if state.use_perspective {
+ state.write("static void run_perspective(Self *self) {\n");
+ if state.uses_discard {
+ state.write(" self->swgl_IsPixelDiscarded = false;\n");
+ }
+ state.write(" self->main();\n");
+ state.write(" self->step_perspective_inputs();\n");
+ state.write("}\n");
+ state.write("static void skip_perspective(Self* self, int steps) {\n");
+ state.write(" self->step_perspective_inputs(steps);\n");
+ state.write("}\n");
+ }
+ if state.hir.lookup("swgl_drawSpanRGBA8").is_some() {
+ state.write(
+ "static void draw_span_RGBA8(Self* self) { DISPATCH_DRAW_SPAN(self, RGBA8); }\n");
+ }
+ if state.hir.lookup("swgl_drawSpanR8").is_some() {
+ state.write(
+ "static void draw_span_R8(Self* self) { DISPATCH_DRAW_SPAN(self, R8); }\n");
+ }
+
+ write!(state, "public:\n{}_frag() {{\n", state.name);
+ }
+ ShaderKind::Vertex => {
+ state.write(
+ "static void run(Self* self, char* interps, size_t interp_stride) {\n",
+ );
+ state.write(" self->main();\n");
+ state.write(" self->store_interp_outputs(interps, interp_stride);\n");
+ state.write("}\n");
+ state.write("static void init_batch(Self *self) { self->bind_textures(); }\n");
+
+ write!(state, "public:\n{}_vert() {{\n", state.name);
+ }
+ }
+ match state.kind {
+ ShaderKind::Fragment => {
+ state.write(" init_span_func = (InitSpanFunc)&read_interp_inputs;\n");
+ state.write(" run_func = (RunFunc)&run;\n");
+ state.write(" skip_func = (SkipFunc)&skip;\n");
+ if state.hir.lookup("swgl_drawSpanRGBA8").is_some() {
+ state.write(" draw_span_RGBA8_func = (DrawSpanRGBA8Func)&draw_span_RGBA8;\n");
+ }
+ if state.hir.lookup("swgl_drawSpanR8").is_some() {
+ state.write(" draw_span_R8_func = (DrawSpanR8Func)&draw_span_R8;\n");
+ }
+ if state.uses_discard {
+ state.write(" enable_discard();\n");
+ }
+ if state.use_perspective {
+ state.write(" enable_perspective();\n");
+ state.write(" init_span_w_func = (InitSpanWFunc)&read_perspective_inputs;\n");
+ state.write(" run_w_func = (RunWFunc)&run_perspective;\n");
+ state.write(" skip_w_func = (SkipWFunc)&skip_perspective;\n");
+ } else {
+ state.write(" init_span_w_func = (InitSpanWFunc)&read_interp_inputs;\n");
+ state.write(" run_w_func = (RunWFunc)&run;\n");
+ state.write(" skip_w_func = (SkipWFunc)&skip;\n");
+ }
+ }
+ ShaderKind::Vertex => {
+ state.write(" set_uniform_1i_func = (SetUniform1iFunc)&set_uniform_1i;\n");
+ state.write(" set_uniform_4fv_func = (SetUniform4fvFunc)&set_uniform_4fv;\n");
+ state.write(" set_uniform_matrix4fv_func = (SetUniformMatrix4fvFunc)&set_uniform_matrix4fv;\n");
+ state.write(" init_batch_func = (InitBatchFunc)&init_batch;\n");
+ state.write(" load_attribs_func = (LoadAttribsFunc)&load_attribs;\n");
+ state.write(" run_primitive_func = (RunPrimitiveFunc)&run;\n");
+ }
+ }
+ state.write("}\n");
+}
+
+pub fn define_global_consts(state: &mut OutputState, tu: &hir::TranslationUnit, part_name: &str) {
+ for i in tu {
+ match i {
+ hir::ExternalDeclaration::Declaration(hir::Declaration::InitDeclaratorList(ref d)) => {
+ let sym = state.hir.sym(d.head.name);
+ match &sym.decl {
+ hir::SymDecl::Global(hir::StorageClass::Const, ..) => {
+ let is_scalar = state.is_scalar.replace(
+ symbol_run_class(&sym.decl, state.vector_mask) == hir::RunClass::Scalar,
+ );
+ if let Some(ref _array) = d.head.ty.array_sizes {
+ show_type(state, &d.head.ty);
+ } else {
+ if let Some(ty_def) = d.head.ty_def {
+ show_sym_decl(state, &ty_def);
+ } else {
+ show_type(state, &d.head.ty);
+ }
+ }
+ write!(state, " constexpr {}::{};\n", part_name, sym.name);
+ state.is_scalar.set(is_scalar);
+ }
+ _ => {}
+ }
+ }
+ _ => {}
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 11:56:05 +0000