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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <charconv>
#include <cstdio>
#include <fstream>
#include <iostream>
#include <limits>
#include <memory>
#include <optional>
#include <sstream>
#include <string>
#include <unordered_map>
#include <vector>
#if TINT_BUILD_GLSL_WRITER
#include "glslang/Public/ResourceLimits.h"
#include "glslang/Public/ShaderLang.h"
#endif // TINT_BUILD_GLSL_WRITER
#if TINT_BUILD_SPV_READER || TINT_BUILD_SPV_WRITER
#include "spirv-tools/libspirv.hpp"
#endif // TINT_BUILD_SPV_READER || TINT_BUILD_SPV_WRITER
#include "src/tint/cmd/generate_external_texture_bindings.h"
#include "src/tint/cmd/helper.h"
#include "src/tint/lang/hlsl/validate/val.h"
#include "src/tint/lang/msl/validate/val.h"
#include "src/tint/lang/wgsl/ast/module.h"
#include "src/tint/utils/cli/cli.h"
#include "src/tint/utils/command/command.h"
#include "src/tint/utils/containers/transform.h"
#include "src/tint/utils/diagnostic/formatter.h"
#include "src/tint/utils/diagnostic/printer.h"
#include "src/tint/utils/macros/defer.h"
#include "src/tint/utils/text/string.h"
#include "src/tint/utils/text/string_stream.h"
#include "tint/tint.h"
#if TINT_BUILD_IR
#include "src/tint/lang/core/ir/disassembler.h" // nogncheck
#include "src/tint/lang/core/ir/module.h" // nogncheck
#include "src/tint/lang/wgsl/reader/program_to_ir/program_to_ir.h" // nogncheck
#endif // TINT_BUILD_IR
#if TINT_BUILD_SPV_WRITER
#define SPV_WRITER_ONLY(x) x
#else
#define SPV_WRITER_ONLY(x)
#endif
#if TINT_BUILD_WGSL_WRITER
#define WGSL_WRITER_ONLY(x) x
#else
#define WGSL_WRITER_ONLY(x)
#endif
#if TINT_BUILD_MSL_WRITER
#define MSL_WRITER_ONLY(x) x
#else
#define MSL_WRITER_ONLY(x)
#endif
#if TINT_BUILD_HLSL_WRITER
#define HLSL_WRITER_ONLY(x) x
#else
#define HLSL_WRITER_ONLY(x)
#endif
#if TINT_BUILD_GLSL_WRITER
#define GLSL_WRITER_ONLY(x) x
#else
#define GLSL_WRITER_ONLY(x)
#endif
namespace {
/// Prints the given hash value in a format string that the end-to-end test runner can parse.
void PrintHash(uint32_t hash) {
std::cout << "<<HASH: 0x" << std::hex << hash << ">>" << std::endl;
}
enum class Format {
kUnknown,
kNone,
kSpirv,
kSpvAsm,
kWgsl,
kMsl,
kHlsl,
kGlsl,
};
struct Options {
bool verbose = false;
std::string input_filename;
std::string output_file = "-"; // Default to stdout
bool parse_only = false;
bool disable_workgroup_init = false;
bool validate = false;
bool print_hash = false;
bool dump_inspector_bindings = false;
bool enable_robustness = false;
std::unordered_set<uint32_t> skip_hash;
Format format = Format::kUnknown;
bool emit_single_entry_point = false;
std::string ep_name;
bool rename_all = false;
#if TINT_BUILD_SPV_READER
tint::spirv::reader::Options spirv_reader_options;
#endif
tint::Vector<std::string, 4> transforms;
std::string fxc_path;
std::string dxc_path;
std::string xcrun_path;
tint::Hashmap<std::string, double, 8> overrides;
std::optional<tint::BindingPoint> hlsl_root_constant_binding_point;
#if TINT_BUILD_IR
bool dump_ir = false;
bool use_ir = false;
#endif // TINT_BUILD_IR
#if TINT_BUILD_SYNTAX_TREE_WRITER
bool dump_ast = false;
#endif // TINT_BUILD_SYNTAX_TREE_WRITER
};
/// @param filename the filename to inspect
/// @returns the inferred format for the filename suffix
Format infer_format(const std::string& filename) {
(void)filename;
#if TINT_BUILD_SPV_WRITER
if (tint::HasSuffix(filename, ".spv")) {
return Format::kSpirv;
}
if (tint::HasSuffix(filename, ".spvasm")) {
return Format::kSpvAsm;
}
#endif // TINT_BUILD_SPV_WRITER
#if TINT_BUILD_WGSL_WRITER
if (tint::HasSuffix(filename, ".wgsl")) {
return Format::kWgsl;
}
#endif // TINT_BUILD_WGSL_WRITER
#if TINT_BUILD_MSL_WRITER
if (tint::HasSuffix(filename, ".metal")) {
return Format::kMsl;
}
#endif // TINT_BUILD_MSL_WRITER
#if TINT_BUILD_HLSL_WRITER
if (tint::HasSuffix(filename, ".hlsl")) {
return Format::kHlsl;
}
#endif // TINT_BUILD_HLSL_WRITER
return Format::kUnknown;
}
bool ParseArgs(tint::VectorRef<std::string_view> arguments,
std::string transform_names,
Options* opts) {
using namespace tint::cli; // NOLINT(build/namespaces)
tint::Vector<EnumName<Format>, 8> format_enum_names{
EnumName(Format::kNone, "none"),
};
SPV_WRITER_ONLY(format_enum_names.Emplace(Format::kSpirv, "spirv"));
SPV_WRITER_ONLY(format_enum_names.Emplace(Format::kSpvAsm, "spvasm"));
WGSL_WRITER_ONLY(format_enum_names.Emplace(Format::kWgsl, "wgsl"));
MSL_WRITER_ONLY(format_enum_names.Emplace(Format::kMsl, "msl"));
HLSL_WRITER_ONLY(format_enum_names.Emplace(Format::kHlsl, "hlsl"));
GLSL_WRITER_ONLY(format_enum_names.Emplace(Format::kGlsl, "glsl"));
OptionSet options;
auto& fmt = options.Add<EnumOption<Format>>("format",
R"(Output format.
If not provided, will be inferred from output filename extension:
.spvasm -> spvasm
.spv -> spirv
.wgsl -> wgsl
.metal -> msl
.hlsl -> hlsl)",
format_enum_names, ShortName{"f"});
TINT_DEFER(opts->format = fmt.value.value_or(Format::kUnknown));
auto& ep = options.Add<StringOption>("entry-point", "Output single entry point",
ShortName{"ep"}, Parameter{"name"});
TINT_DEFER({
if (ep.value.has_value()) {
opts->ep_name = *ep.value;
opts->emit_single_entry_point = true;
}
});
auto& output = options.Add<StringOption>("output-name", "Output file name", ShortName{"o"},
Parameter{"name"});
TINT_DEFER(opts->output_file = output.value.value_or(""));
auto& fxc_path =
options.Add<StringOption>("fxc", R"(Path to FXC dll, used to validate HLSL output.
When specified, automatically enables HLSL validation with FXC)",
Parameter{"path"});
TINT_DEFER(opts->fxc_path = fxc_path.value.value_or(""));
auto& dxc_path =
options.Add<StringOption>("dxc", R"(Path to DXC dll, used to validate HLSL output.
When specified, automatically enables HLSL validation with DXC)",
Parameter{"path"});
TINT_DEFER(opts->dxc_path = dxc_path.value.value_or(""));
auto& xcrun =
options.Add<StringOption>("xcrun", R"(Path to xcrun executable, used to validate MSL output.
When specified, automatically enables MSL validation)",
Parameter{"path"});
TINT_DEFER({
if (xcrun.value.has_value()) {
opts->xcrun_path = *xcrun.value;
opts->validate = true;
}
});
#if TINT_BUILD_IR
auto& dump_ir = options.Add<BoolOption>("dump-ir", "Writes the IR to stdout", Alias{"emit-ir"},
Default{false});
TINT_DEFER(opts->dump_ir = *dump_ir.value);
auto& use_ir = options.Add<BoolOption>(
"use-ir", "Use the IR for writers and transforms when possible", Default{false});
TINT_DEFER(opts->use_ir = *use_ir.value);
#endif // TINT_BUILD_IR
auto& verbose =
options.Add<BoolOption>("verbose", "Verbose output", ShortName{"v"}, Default{false});
TINT_DEFER(opts->verbose = *verbose.value);
auto& validate = options.Add<BoolOption>(
"validate", "Validates the generated shader with all available validators", Default{false});
TINT_DEFER(opts->validate = *validate.value);
auto& parse_only =
options.Add<BoolOption>("parse-only", "Stop after parsing the input", Default{false});
TINT_DEFER(opts->parse_only = *parse_only.value);
#if TINT_BUILD_SPV_READER
auto& allow_nud =
options.Add<BoolOption>("allow-non-uniform-derivatives",
R"(When using SPIR-V input, allow non-uniform derivatives by
inserting a module-scope directive to suppress any uniformity
violations that may be produced)",
Default{false});
TINT_DEFER({
if (allow_nud.value.value_or(false)) {
opts->spirv_reader_options.allow_non_uniform_derivatives = true;
}
});
#endif
auto& disable_wg_init = options.Add<BoolOption>(
"disable-workgroup-init", "Disable workgroup memory zero initialization", Default{false});
TINT_DEFER(opts->disable_workgroup_init = *disable_wg_init.value);
auto& rename_all = options.Add<BoolOption>("rename-all", "Renames all symbols", Default{false});
TINT_DEFER(opts->rename_all = *rename_all.value);
auto& dump_inspector_bindings = options.Add<BoolOption>(
"dump-inspector-bindings", "Dump reflection data about bindings to stdout",
Alias{"emit-inspector-bindings"}, Default{false});
TINT_DEFER(opts->dump_inspector_bindings = *dump_inspector_bindings.value);
#if TINT_BUILD_SYNTAX_TREE_WRITER
auto& dump_ast = options.Add<BoolOption>("dump-ast", "Writes the AST to stdout",
Alias{"emit-ast"}, Default{false});
TINT_DEFER(opts->dump_ast = *dump_ast.value);
#endif // TINT_BUILD_SYNTAX_TREE_WRITER
auto& print_hash = options.Add<BoolOption>("print-hash", "Emit the hash of the output program",
Default{false});
TINT_DEFER(opts->print_hash = *print_hash.value);
auto& transforms =
options.Add<StringOption>("transform", R"(Runs transforms, name list is comma separated
Available transforms:
)" + transform_names,
ShortName{"t"});
TINT_DEFER({
if (transforms.value.has_value()) {
for (auto transform : tint::Split(*transforms.value, ",")) {
opts->transforms.Push(std::string(transform));
}
}
});
auto& hlsl_rc_bp = options.Add<StringOption>("hlsl-root-constant-binding-point",
R"(Binding point for root constant.
Specify the binding point for generated uniform buffer
used for num_workgroups in HLSL. If not specified, then
default to binding 0 of the largest used group plus 1,
or group 0 if no resource bound)");
auto& skip_hash = options.Add<StringOption>(
"skip-hash", R"(Skips validation if the hash of the output is equal to any
of the hash codes in the comma separated list of hashes)");
TINT_DEFER({
if (skip_hash.value.has_value()) {
for (auto hash : tint::Split(*skip_hash.value, ",")) {
uint32_t value = 0;
int base = 10;
if (hash.size() > 2 && hash[0] == '0' && (hash[1] == 'x' || hash[1] == 'X')) {
hash = hash.substr(2);
base = 16;
}
std::from_chars(hash.data(), hash.data() + hash.size(), value, base);
opts->skip_hash.emplace(value);
}
}
});
auto& overrides = options.Add<StringOption>(
"overrides", "Override values as IDENTIFIER=VALUE, comma-separated");
auto& help = options.Add<BoolOption>("help", "Show usage", ShortName{"h"});
auto show_usage = [&] {
std::cout << R"(Usage: tint [options] <input-file>
Options:
)";
options.ShowHelp(std::cout);
};
auto result = options.Parse(std::cerr, arguments);
if (!result) {
std::cerr << std::endl;
show_usage();
return false;
}
if (help.value.value_or(false)) {
show_usage();
return false;
}
if (overrides.value.has_value()) {
for (const auto& o : tint::Split(*overrides.value, ",")) {
auto parts = tint::Split(o, "=");
if (parts.Length() != 2) {
std::cerr << "override values must be of the form IDENTIFIER=VALUE";
return false;
}
auto value = tint::ParseNumber<double>(parts[1]);
if (!value) {
std::cerr << "invalid override value: " << parts[1];
return false;
}
opts->overrides.Add(std::string(parts[0]), value.Get());
}
}
if (hlsl_rc_bp.value.has_value()) {
auto binding_points = tint::Split(*hlsl_rc_bp.value, ",");
if (binding_points.Length() != 2) {
std::cerr << "Invalid binding point for " << hlsl_rc_bp.name << ": "
<< *hlsl_rc_bp.value << std::endl;
return false;
}
auto group = tint::ParseUint32(binding_points[0]);
if (!group) {
std::cerr << "Invalid group for " << hlsl_rc_bp.name << ": " << binding_points[0]
<< std::endl;
return false;
}
auto binding = tint::ParseUint32(binding_points[1]);
if (!binding) {
std::cerr << "Invalid binding for " << hlsl_rc_bp.name << ": " << binding_points[1]
<< std::endl;
return false;
}
opts->hlsl_root_constant_binding_point = tint::BindingPoint{group.Get(), binding.Get()};
}
auto files = result.Get();
if (files.Length() > 1) {
std::cerr << "More than one input file specified: "
<< tint::Join(Transform(files, tint::Quote), ", ") << std::endl;
return false;
}
if (files.Length() == 1) {
opts->input_filename = files[0];
}
return true;
}
/// Writes the given `buffer` into the file named as `output_file` using the
/// given `mode`. If `output_file` is empty or "-", writes to standard
/// output. If any error occurs, returns false and outputs error message to
/// standard error. The ContainerT type must have data() and size() methods,
/// like `std::string` and `std::vector` do.
/// @returns true on success
template <typename ContainerT>
bool WriteFile(const std::string& output_file, const std::string mode, const ContainerT& buffer) {
const bool use_stdout = output_file.empty() || output_file == "-";
FILE* file = stdout;
if (!use_stdout) {
#if defined(_MSC_VER)
fopen_s(&file, output_file.c_str(), mode.c_str());
#else
file = fopen(output_file.c_str(), mode.c_str());
#endif
if (!file) {
std::cerr << "Could not open file " << output_file << " for writing" << std::endl;
return false;
}
}
size_t written =
fwrite(buffer.data(), sizeof(typename ContainerT::value_type), buffer.size(), file);
if (buffer.size() != written) {
if (use_stdout) {
std::cerr << "Could not write all output to standard output" << std::endl;
} else {
std::cerr << "Could not write to file " << output_file << std::endl;
fclose(file);
}
return false;
}
if (!use_stdout) {
fclose(file);
}
return true;
}
#if TINT_BUILD_SPV_WRITER
std::string Disassemble(const std::vector<uint32_t>& data) {
std::string spv_errors;
spv_target_env target_env = SPV_ENV_UNIVERSAL_1_0;
auto msg_consumer = [&spv_errors](spv_message_level_t level, const char*,
const spv_position_t& position, const char* message) {
switch (level) {
case SPV_MSG_FATAL:
case SPV_MSG_INTERNAL_ERROR:
case SPV_MSG_ERROR:
spv_errors +=
"error: line " + std::to_string(position.index) + ": " + message + "\n";
break;
case SPV_MSG_WARNING:
spv_errors +=
"warning: line " + std::to_string(position.index) + ": " + message + "\n";
break;
case SPV_MSG_INFO:
spv_errors +=
"info: line " + std::to_string(position.index) + ": " + message + "\n";
break;
case SPV_MSG_DEBUG:
break;
}
};
spvtools::SpirvTools tools(target_env);
tools.SetMessageConsumer(msg_consumer);
std::string result;
if (!tools.Disassemble(
data, &result,
SPV_BINARY_TO_TEXT_OPTION_INDENT | SPV_BINARY_TO_TEXT_OPTION_FRIENDLY_NAMES)) {
std::cerr << spv_errors << std::endl;
}
return result;
}
#endif // TINT_BUILD_SPV_WRITER
/// Generate SPIR-V code for a program.
/// @param program the program to generate
/// @param options the options that Tint was invoked with
/// @returns true on success
bool GenerateSpirv(const tint::Program* program, const Options& options) {
#if TINT_BUILD_SPV_WRITER
// TODO(jrprice): Provide a way for the user to set non-default options.
tint::spirv::writer::Options gen_options;
gen_options.disable_robustness = !options.enable_robustness;
gen_options.disable_workgroup_init = options.disable_workgroup_init;
gen_options.external_texture_options.bindings_map =
tint::cmd::GenerateExternalTextureBindings(program);
#if TINT_BUILD_IR
gen_options.use_tint_ir = options.use_ir;
#endif
auto result = tint::spirv::writer::Generate(program, gen_options);
if (!result) {
tint::cmd::PrintWGSL(std::cerr, *program);
std::cerr << "Failed to generate: " << result.Failure() << std::endl;
return false;
}
if (options.format == Format::kSpvAsm) {
if (!WriteFile(options.output_file, "w", Disassemble(result.Get().spirv))) {
return false;
}
} else {
if (!WriteFile(options.output_file, "wb", result.Get().spirv)) {
return false;
}
}
const auto hash = tint::CRC32(result.Get().spirv.data(), result.Get().spirv.size());
if (options.print_hash) {
PrintHash(hash);
}
if (options.validate && options.skip_hash.count(hash) == 0) {
// Use Vulkan 1.1, since this is what Tint, internally, uses.
spvtools::SpirvTools tools(SPV_ENV_VULKAN_1_1);
tools.SetMessageConsumer(
[](spv_message_level_t, const char*, const spv_position_t& pos, const char* msg) {
std::cerr << (pos.line + 1) << ":" << (pos.column + 1) << ": " << msg << std::endl;
});
if (!tools.Validate(result.Get().spirv.data(), result.Get().spirv.size(),
spvtools::ValidatorOptions())) {
return false;
}
}
return true;
#else
(void)program;
(void)options;
std::cerr << "SPIR-V writer not enabled in tint build" << std::endl;
return false;
#endif // TINT_BUILD_SPV_WRITER
}
/// Generate WGSL code for a program.
/// @param program the program to generate
/// @param options the options that Tint was invoked with
/// @returns true on success
bool GenerateWgsl(const tint::Program* program, const Options& options) {
#if TINT_BUILD_WGSL_WRITER
// TODO(jrprice): Provide a way for the user to set non-default options.
tint::wgsl::writer::Options gen_options;
auto result = tint::wgsl::writer::Generate(program, gen_options);
if (!result) {
std::cerr << "Failed to generate: " << result.Failure() << std::endl;
return false;
}
if (!WriteFile(options.output_file, "w", result->wgsl)) {
return false;
}
const auto hash = tint::CRC32(result->wgsl.data(), result->wgsl.size());
if (options.print_hash) {
PrintHash(hash);
}
if (options.validate && options.skip_hash.count(hash) == 0) {
// Attempt to re-parse the output program with Tint's WGSL reader.
auto source = std::make_unique<tint::Source::File>(options.input_filename, result->wgsl);
auto reparsed_program = tint::wgsl::reader::Parse(source.get());
if (!reparsed_program.IsValid()) {
auto diag_printer = tint::diag::Printer::create(stderr, true);
tint::diag::Formatter diag_formatter;
diag_formatter.format(reparsed_program.Diagnostics(), diag_printer.get());
return false;
}
}
return true;
#else
(void)program;
(void)options;
std::cerr << "WGSL writer not enabled in tint build" << std::endl;
return false;
#endif // TINT_BUILD_WGSL_WRITER
}
/// Generate MSL code for a program.
/// @param program the program to generate
/// @param options the options that Tint was invoked with
/// @returns true on success
bool GenerateMsl(const tint::Program* program, const Options& options) {
#if TINT_BUILD_MSL_WRITER
// Remap resource numbers to a flat namespace.
// TODO(crbug.com/tint/1501): Do this via Options::BindingMap.
const tint::Program* input_program = program;
auto flattened = tint::writer::FlattenBindings(program);
if (flattened) {
input_program = &*flattened;
}
// TODO(jrprice): Provide a way for the user to set non-default options.
tint::msl::writer::Options gen_options;
#if TINT_BUILD_IR
gen_options.use_tint_ir = options.use_ir;
#endif
gen_options.disable_robustness = !options.enable_robustness;
gen_options.disable_workgroup_init = options.disable_workgroup_init;
gen_options.external_texture_options.bindings_map =
tint::cmd::GenerateExternalTextureBindings(input_program);
gen_options.array_length_from_uniform.ubo_binding = tint::BindingPoint{0, 30};
gen_options.array_length_from_uniform.bindpoint_to_size_index.emplace(tint::BindingPoint{0, 0},
0);
gen_options.array_length_from_uniform.bindpoint_to_size_index.emplace(tint::BindingPoint{0, 1},
1);
auto result = tint::msl::writer::Generate(input_program, gen_options);
if (!result) {
tint::cmd::PrintWGSL(std::cerr, *program);
std::cerr << "Failed to generate: " << result.Failure() << std::endl;
return false;
}
if (!WriteFile(options.output_file, "w", result->msl)) {
return false;
}
const auto hash = tint::CRC32(result->msl.c_str());
if (options.print_hash) {
PrintHash(hash);
}
if (options.validate && options.skip_hash.count(hash) == 0) {
tint::msl::validate::Result res;
#ifdef TINT_ENABLE_MSL_VALIDATION_USING_METAL_API
res = tint::msl::validate::UsingMetalAPI(result->msl);
#else
#ifdef _WIN32
const char* default_xcrun_exe = "metal.exe";
#else
const char* default_xcrun_exe = "xcrun";
#endif
auto xcrun = tint::Command::LookPath(
options.xcrun_path.empty() ? default_xcrun_exe : std::string(options.xcrun_path));
if (xcrun.Found()) {
res = tint::msl::validate::Msl(xcrun.Path(), result->msl);
} else {
res.output = "xcrun executable not found. Cannot validate.";
res.failed = true;
}
#endif // TINT_ENABLE_MSL_VALIDATION_USING_METAL_API
if (res.failed) {
std::cerr << res.output << std::endl;
return false;
}
}
return true;
#else
(void)program;
(void)options;
std::cerr << "MSL writer not enabled in tint build" << std::endl;
return false;
#endif // TINT_BUILD_MSL_WRITER
}
/// Generate HLSL code for a program.
/// @param program the program to generate
/// @param options the options that Tint was invoked with
/// @returns true on success
bool GenerateHlsl(const tint::Program* program, const Options& options) {
#if TINT_BUILD_HLSL_WRITER
// TODO(jrprice): Provide a way for the user to set non-default options.
tint::hlsl::writer::Options gen_options;
gen_options.disable_robustness = !options.enable_robustness;
gen_options.disable_workgroup_init = options.disable_workgroup_init;
gen_options.external_texture_options.bindings_map =
tint::cmd::GenerateExternalTextureBindings(program);
gen_options.root_constant_binding_point = options.hlsl_root_constant_binding_point;
auto result = tint::hlsl::writer::Generate(program, gen_options);
if (!result) {
tint::cmd::PrintWGSL(std::cerr, *program);
std::cerr << "Failed to generate: " << result.Failure() << std::endl;
return false;
}
if (!WriteFile(options.output_file, "w", result->hlsl)) {
return false;
}
const auto hash = tint::CRC32(result->hlsl.c_str());
if (options.print_hash) {
PrintHash(hash);
}
// If --fxc or --dxc was passed, then we must explicitly find and validate with that respective
// compiler.
const bool must_validate_dxc = !options.dxc_path.empty();
const bool must_validate_fxc = !options.fxc_path.empty();
if ((options.validate || must_validate_dxc || must_validate_fxc) &&
(options.skip_hash.count(hash) == 0)) {
tint::hlsl::validate::Result dxc_res;
bool dxc_found = false;
if (options.validate || must_validate_dxc) {
auto dxc = tint::Command::LookPath(
options.dxc_path.empty() ? "dxc" : std::string(options.dxc_path));
if (dxc.Found()) {
dxc_found = true;
auto enable_list = program->AST().Enables();
bool dxc_require_16bit_types = false;
for (auto* enable : enable_list) {
if (enable->HasExtension(tint::builtin::Extension::kF16)) {
dxc_require_16bit_types = true;
break;
}
}
dxc_res = tint::hlsl::validate::UsingDXC(
dxc.Path(), result->hlsl, result->entry_points, dxc_require_16bit_types);
} else if (must_validate_dxc) {
// DXC was explicitly requested. Error if it could not be found.
dxc_res.failed = true;
dxc_res.output = "DXC executable '" + std::string(options.dxc_path) +
"' not found. Cannot validate";
}
}
tint::hlsl::validate::Result fxc_res;
bool fxc_found = false;
if (options.validate || must_validate_fxc) {
auto fxc =
tint::Command::LookPath(options.fxc_path.empty() ? tint::hlsl::validate::kFxcDLLName
: std::string(options.fxc_path));
#ifdef _WIN32
if (fxc.Found()) {
fxc_found = true;
fxc_res =
tint::hlsl::validate::UsingFXC(fxc.Path(), result->hlsl, result->entry_points);
} else if (must_validate_fxc) {
// FXC was explicitly requested. Error if it could not be found.
fxc_res.failed = true;
fxc_res.output = "FXC DLL '" + options.fxc_path + "' not found. Cannot validate";
}
#else
if (must_validate_dxc) {
fxc_res.failed = true;
fxc_res.output = "FXC can only be used on Windows.";
}
#endif // _WIN32
}
if (fxc_res.failed) {
std::cerr << "FXC validation failure:" << std::endl << fxc_res.output << std::endl;
}
if (dxc_res.failed) {
std::cerr << "DXC validation failure:" << std::endl << dxc_res.output << std::endl;
}
if (fxc_res.failed || dxc_res.failed) {
return false;
}
if (!fxc_found && !dxc_found) {
std::cerr << "Couldn't find FXC or DXC. Cannot validate" << std::endl;
return false;
}
if (options.verbose) {
if (fxc_found && !fxc_res.failed) {
std::cout << "Passed FXC validation" << std::endl;
std::cout << fxc_res.output;
std::cout << std::endl;
}
if (dxc_found && !dxc_res.failed) {
std::cout << "Passed DXC validation" << std::endl;
std::cout << dxc_res.output;
std::cout << std::endl;
}
}
}
return true;
#else
(void)program;
(void)options;
std::cerr << "HLSL writer not enabled in tint build" << std::endl;
return false;
#endif // TINT_BUILD_HLSL_WRITER
}
#if TINT_BUILD_GLSL_WRITER
EShLanguage pipeline_stage_to_esh_language(tint::ast::PipelineStage stage) {
switch (stage) {
case tint::ast::PipelineStage::kFragment:
return EShLangFragment;
case tint::ast::PipelineStage::kVertex:
return EShLangVertex;
case tint::ast::PipelineStage::kCompute:
return EShLangCompute;
default:
TINT_UNREACHABLE();
return EShLangVertex;
}
}
#endif
/// Generate GLSL code for a program.
/// @param program the program to generate
/// @param options the options that Tint was invoked with
/// @returns true on success
bool GenerateGlsl(const tint::Program* program, const Options& options) {
#if TINT_BUILD_GLSL_WRITER
if (options.validate) {
glslang::InitializeProcess();
}
auto generate = [&](const tint::Program* prg, const std::string entry_point_name) -> bool {
tint::glsl::writer::Options gen_options;
gen_options.disable_robustness = !options.enable_robustness;
gen_options.external_texture_options.bindings_map =
tint::cmd::GenerateExternalTextureBindings(prg);
auto result = tint::glsl::writer::Generate(prg, gen_options, entry_point_name);
if (!result) {
tint::cmd::PrintWGSL(std::cerr, *prg);
std::cerr << "Failed to generate: " << result.Failure() << std::endl;
return false;
}
if (!WriteFile(options.output_file, "w", result->glsl)) {
return false;
}
const auto hash = tint::CRC32(result->glsl.c_str());
if (options.print_hash) {
PrintHash(hash);
}
if (options.validate && options.skip_hash.count(hash) == 0) {
for (auto entry_pt : result->entry_points) {
EShLanguage lang = pipeline_stage_to_esh_language(entry_pt.second);
glslang::TShader shader(lang);
const char* strings[1] = {result->glsl.c_str()};
int lengths[1] = {static_cast<int>(result->glsl.length())};
shader.setStringsWithLengths(strings, lengths, 1);
shader.setEntryPoint("main");
bool glslang_result = shader.parse(GetDefaultResources(), 310, EEsProfile, false,
false, EShMsgDefault);
if (!glslang_result) {
std::cerr << "Error parsing GLSL shader:\n"
<< shader.getInfoLog() << "\n"
<< shader.getInfoDebugLog() << "\n";
return false;
}
}
}
return true;
};
tint::inspector::Inspector inspector(program);
if (inspector.GetEntryPoints().empty()) {
// Pass empty string here so that the GLSL generator will generate
// code for all functions, reachable or not.
return generate(program, "");
}
bool success = true;
for (auto& entry_point : inspector.GetEntryPoints()) {
success &= generate(program, entry_point.name);
}
return success;
#else
(void)program;
(void)options;
std::cerr << "GLSL writer not enabled in tint build" << std::endl;
return false;
#endif // TINT_BUILD_GLSL_WRITER
}
} // namespace
int main(int argc, const char** argv) {
tint::Vector<std::string_view, 8> arguments;
for (int i = 1; i < argc; i++) {
std::string_view arg(argv[i]);
if (!arg.empty()) {
arguments.Push(argv[i]);
}
}
Options options;
tint::Initialize();
tint::SetInternalCompilerErrorReporter(&tint::cmd::TintInternalCompilerErrorReporter);
struct TransformFactory {
const char* name;
/// Build and adds the transform to the transform manager.
/// Parameters:
/// inspector - an inspector created from the parsed program
/// manager - the transform manager. Add transforms to this.
/// inputs - the input data to the transform manager. Add inputs to this.
/// Returns true on success, false on error (program will immediately exit)
std::function<bool(tint::inspector::Inspector& inspector,
tint::ast::transform::Manager& manager,
tint::ast::transform::DataMap& inputs)>
make;
};
std::vector<TransformFactory> transforms = {
{"first_index_offset",
[](tint::inspector::Inspector&, tint::ast::transform::Manager& m,
tint::ast::transform::DataMap& i) {
i.Add<tint::ast::transform::FirstIndexOffset::BindingPoint>(0, 0);
m.Add<tint::ast::transform::FirstIndexOffset>();
return true;
}},
{"renamer",
[](tint::inspector::Inspector&, tint::ast::transform::Manager& m,
tint::ast::transform::DataMap&) {
m.Add<tint::ast::transform::Renamer>();
return true;
}},
{"robustness",
[&](tint::inspector::Inspector&, tint::ast::transform::Manager&,
tint::ast::transform::DataMap&) { // enabled via writer option
options.enable_robustness = true;
return true;
}},
{"substitute_override",
[&](tint::inspector::Inspector& inspector, tint::ast::transform::Manager& m,
tint::ast::transform::DataMap& i) {
tint::ast::transform::SubstituteOverride::Config cfg;
std::unordered_map<tint::OverrideId, double> values;
values.reserve(options.overrides.Count());
for (auto override : options.overrides) {
const auto& name = override.key;
const auto& value = override.value;
if (name.empty()) {
std::cerr << "empty override name" << std::endl;
return false;
}
if (auto num = tint::ParseNumber<decltype(tint::OverrideId::value)>(name)) {
tint::OverrideId id{num.Get()};
values.emplace(id, value);
} else {
auto override_names = inspector.GetNamedOverrideIds();
auto it = override_names.find(name);
if (it == override_names.end()) {
std::cerr << "unknown override '" << name << "'" << std::endl;
return false;
}
values.emplace(it->second, value);
}
}
cfg.map = std::move(values);
i.Add<tint::ast::transform::SubstituteOverride::Config>(cfg);
m.Add<tint::ast::transform::SubstituteOverride>();
return true;
}},
};
auto transform_names = [&] {
tint::StringStream names;
for (auto& t : transforms) {
names << " " << t.name << std::endl;
}
return names.str();
};
if (!ParseArgs(arguments, transform_names(), &options)) {
return 1;
}
// Implement output format defaults.
if (options.format == Format::kUnknown) {
// Try inferring from filename.
options.format = infer_format(options.output_file);
}
if (options.format == Format::kUnknown) {
// Ultimately, default to SPIR-V assembly. That's nice for interactive use.
options.format = Format::kSpvAsm;
}
std::unique_ptr<tint::Program> program;
std::unique_ptr<tint::Source::File> source_file;
{
tint::cmd::LoadProgramOptions opts;
opts.filename = options.input_filename;
#if TINT_BUILD_SPV_READER
opts.spirv_reader_options = options.spirv_reader_options;
#endif
auto info = tint::cmd::LoadProgramInfo(opts);
program = std::move(info.program);
source_file = std::move(info.source_file);
}
if (options.parse_only) {
return 1;
}
#if TINT_BUILD_SYNTAX_TREE_WRITER
if (options.dump_ast) {
tint::wgsl::writer::Options gen_options;
gen_options.use_syntax_tree_writer = true;
auto result = tint::wgsl::writer::Generate(program.get(), gen_options);
if (!result) {
std::cerr << "Failed to dump AST: " << result.Failure() << std::endl;
} else {
std::cout << result->wgsl << std::endl;
}
}
#endif // TINT_BUILD_SYNTAX_TREE_WRITER
#if TINT_BUILD_WGSL_READER && TINT_BUILD_IR
if (options.dump_ir) {
auto result = tint::wgsl::reader::ProgramToIR(program.get());
if (!result) {
std::cerr << "Failed to build IR from program: " << result.Failure() << std::endl;
} else {
auto mod = result.Move();
if (options.dump_ir) {
tint::ir::Disassembler d(mod);
std::cout << d.Disassemble() << std::endl;
}
}
}
#endif // TINT_BUILD_WGSL_READER && TINT_BUILD_IR
tint::inspector::Inspector inspector(program.get());
if (options.dump_inspector_bindings) {
tint::cmd::PrintInspectorBindings(inspector);
}
tint::ast::transform::Manager transform_manager;
tint::ast::transform::DataMap transform_inputs;
// Renaming must always come first
switch (options.format) {
case Format::kMsl: {
#if TINT_BUILD_MSL_WRITER
transform_inputs.Add<tint::ast::transform::Renamer::Config>(
options.rename_all ? tint::ast::transform::Renamer::Target::kAll
: tint::ast::transform::Renamer::Target::kMslKeywords,
/* preserve_unicode */ false);
transform_manager.Add<tint::ast::transform::Renamer>();
#endif // TINT_BUILD_MSL_WRITER
break;
}
#if TINT_BUILD_GLSL_WRITER
case Format::kGlsl: {
transform_inputs.Add<tint::ast::transform::Renamer::Config>(
options.rename_all ? tint::ast::transform::Renamer::Target::kAll
: tint::ast::transform::Renamer::Target::kGlslKeywords,
/* preserve_unicode */ false);
transform_manager.Add<tint::ast::transform::Renamer>();
break;
}
#endif // TINT_BUILD_GLSL_WRITER
case Format::kHlsl: {
#if TINT_BUILD_HLSL_WRITER
transform_inputs.Add<tint::ast::transform::Renamer::Config>(
options.rename_all ? tint::ast::transform::Renamer::Target::kAll
: tint::ast::transform::Renamer::Target::kHlslKeywords,
/* preserve_unicode */ false);
transform_manager.Add<tint::ast::transform::Renamer>();
#endif // TINT_BUILD_HLSL_WRITER
break;
}
default: {
if (options.rename_all) {
transform_manager.Add<tint::ast::transform::Renamer>();
}
break;
}
}
auto enable_transform = [&](std::string_view name) {
for (auto& t : transforms) {
if (t.name == name) {
return t.make(inspector, transform_manager, transform_inputs);
}
}
std::cerr << "Unknown transform: " << name << std::endl;
std::cerr << "Available transforms: " << std::endl << transform_names() << std::endl;
return false;
};
// If overrides are provided, add the SubstituteOverride transform.
if (!options.overrides.IsEmpty()) {
if (!enable_transform("substitute_override")) {
return 1;
}
}
for (const auto& name : options.transforms) {
// TODO(dsinclair): The vertex pulling transform requires setup code to
// be run that needs user input. Should we find a way to support that here
// maybe through a provided file?
if (!enable_transform(name)) {
return 1;
}
}
if (options.emit_single_entry_point) {
transform_manager.append(std::make_unique<tint::ast::transform::SingleEntryPoint>());
transform_inputs.Add<tint::ast::transform::SingleEntryPoint::Config>(options.ep_name);
}
tint::ast::transform::DataMap outputs;
auto out = transform_manager.Run(program.get(), std::move(transform_inputs), outputs);
if (!out.IsValid()) {
tint::cmd::PrintWGSL(std::cerr, out);
std::cerr << out.Diagnostics().str() << std::endl;
return 1;
}
*program = std::move(out);
bool success = false;
switch (options.format) {
case Format::kSpirv:
case Format::kSpvAsm:
success = GenerateSpirv(program.get(), options);
break;
case Format::kWgsl:
success = GenerateWgsl(program.get(), options);
break;
case Format::kMsl:
success = GenerateMsl(program.get(), options);
break;
case Format::kHlsl:
success = GenerateHlsl(program.get(), options);
break;
case Format::kGlsl:
success = GenerateGlsl(program.get(), options);
break;
case Format::kNone:
break;
default:
std::cerr << "Unknown output format specified" << std::endl;
return 1;
}
if (!success) {
return 1;
}
return 0;
}