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// Copyright 2023 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 <iostream>
#include "src/tint/cmd/generate_external_texture_bindings.h"
#include "src/tint/cmd/helper.h"
#include "tint/tint.h"
#if TINT_BUILD_IR
#include "src/tint/lang/core/ir/from_program.h"
#include "src/tint/lang/core/ir/module.h"
#endif // TINT_BUILD_IR
namespace {
enum class Format {
kUnknown,
kNone,
kSpirv,
kWgsl,
kMsl,
kHlsl,
kGlsl,
};
enum class Looper {
kLoad,
kIRGenerate,
kWriter,
};
struct Options {
bool show_help = false;
std::string input_filename;
Format format = Format::kUnknown;
Looper loop = Looper::kLoad;
uint32_t loop_count = 100;
};
const char kUsage[] = R"(Usage: tint-loopy [options] <input-file>
options:
--format <spirv|wgsl|msl|hlsl|none> -- Generation format. Default SPIR-V.
--loop <load,ir-gen,writer> -- Item to loop
--loop-count <num> -- Number of loops to run, default 100.
)";
Format parse_format(const std::string& fmt) {
(void)fmt;
#if TINT_BUILD_SPV_WRITER
if (fmt == "spirv") {
return Format::kSpirv;
}
#endif // TINT_BUILD_SPV_WRITER
#if TINT_BUILD_WGSL_WRITER
if (fmt == "wgsl") {
return Format::kWgsl;
}
#endif // TINT_BUILD_WGSL_WRITER
#if TINT_BUILD_MSL_WRITER
if (fmt == "msl") {
return Format::kMsl;
}
#endif // TINT_BUILD_MSL_WRITER
#if TINT_BUILD_HLSL_WRITER
if (fmt == "hlsl") {
return Format::kHlsl;
}
#endif // TINT_BUILD_HLSL_WRITER
#if TINT_BUILD_GLSL_WRITER
if (fmt == "glsl") {
return Format::kGlsl;
}
#endif // TINT_BUILD_GLSL_WRITER
if (fmt == "none") {
return Format::kNone;
}
return Format::kUnknown;
}
bool ParseArgs(const std::vector<std::string>& args, Options* opts) {
for (size_t i = 1; i < args.size(); ++i) {
const std::string& arg = args[i];
if (arg == "--format") {
++i;
if (i >= args.size()) {
std::cerr << "Missing value for --format argument." << std::endl;
return false;
}
opts->format = parse_format(args[i]);
if (opts->format == Format::kUnknown) {
std::cerr << "Unknown output format: " << args[i] << std::endl;
return false;
}
} else if (arg == "-h" || arg == "--help") {
opts->show_help = true;
} else if (arg == "--loop") {
++i;
if (i >= args.size()) {
std::cerr << "Missing value for --loop argument." << std::endl;
return false;
}
if (args[i] == "load") {
opts->loop = Looper::kLoad;
} else if (args[i] == "ir-gen") {
opts->loop = Looper::kIRGenerate;
} else if (args[i] == "writer") {
opts->loop = Looper::kWriter;
} else {
std::cerr << "Invalid loop value" << std::endl;
return false;
}
} else if (arg == "--loop-count") {
++i;
if (i >= args.size()) {
std::cerr << "Missing value for --loop-count argument." << std::endl;
return false;
}
int32_t val = atoi(args[i].c_str());
if (val <= 0) {
std::cerr << "Loop count must be greater then 0" << std::endl;
return false;
}
opts->loop_count = static_cast<uint32_t>(val);
} else if (!arg.empty()) {
if (arg[0] == '-') {
std::cerr << "Unrecognized option: " << arg << std::endl;
return false;
}
if (!opts->input_filename.empty()) {
std::cerr << "More than one input file specified: '" << opts->input_filename
<< "' and '" << arg << "'" << std::endl;
return false;
}
opts->input_filename = arg;
}
}
return true;
}
/// Generate SPIR-V code for a program.
/// @param program the program to generate
/// @returns true on success
bool GenerateSpirv(const tint::Program* program) {
#if TINT_BUILD_SPV_WRITER
tint::writer::spirv::Options gen_options;
gen_options.external_texture_options.bindings_map =
tint::cmd::GenerateExternalTextureBindings(program);
auto result = tint::writer::spirv::Generate(program, gen_options);
if (!result.success) {
tint::cmd::PrintWGSL(std::cerr, *program);
std::cerr << "Failed to generate: " << result.error << std::endl;
return false;
}
return true;
#else
(void)program;
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
/// @returns true on success
bool GenerateWgsl(const tint::Program* program) {
#if TINT_BUILD_WGSL_WRITER
tint::wgsl::writer::Options gen_options;
auto result = tint::wgsl::writer::Generate(program, gen_options);
if (!result.success) {
std::cerr << "Failed to generate: " << result.error << std::endl;
return false;
}
return true;
#else
(void)program;
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
/// @returns true on success
bool GenerateMsl(const tint::Program* program) {
#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;
}
tint::msl::writer::Options gen_options;
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.success) {
tint::cmd::PrintWGSL(std::cerr, *program);
std::cerr << "Failed to generate: " << result.error << std::endl;
return false;
}
return true;
#else
(void)program;
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
/// @returns true on success
bool GenerateHlsl(const tint::Program* program) {
#if TINT_BUILD_HLSL_WRITER
tint::hlsl::writer::Options gen_options;
gen_options.external_texture_options.bindings_map =
tint::cmd::GenerateExternalTextureBindings(program);
auto result = tint::hlsl::writer::Generate(program, gen_options);
if (!result.success) {
tint::cmd::PrintWGSL(std::cerr, *program);
std::cerr << "Failed to generate: " << result.error << std::endl;
return false;
}
return true;
#else
(void)program;
std::cerr << "HLSL writer not enabled in tint build" << std::endl;
return false;
#endif // TINT_BUILD_HLSL_WRITER
}
/// Generate GLSL code for a program.
/// @param program the program to generate
/// @returns true on success
bool GenerateGlsl(const tint::Program* program) {
#if TINT_BUILD_GLSL_WRITER
tint::writer::glsl::Options gen_options;
gen_options.external_texture_options.bindings_map =
tint::cmd::GenerateExternalTextureBindings(program);
auto result = tint::writer::glsl::Generate(program, gen_options, "");
if (!result.success) {
tint::cmd::PrintWGSL(std::cerr, *program);
std::cerr << "Failed to generate: " << result.error << std::endl;
return false;
}
return true;
#else
(void)program;
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) {
std::vector<std::string> args(argv, argv + argc);
Options options;
tint::SetInternalCompilerErrorReporter(&tint::cmd::TintInternalCompilerErrorReporter);
#if TINT_BUILD_WGSL_WRITER
tint::Program::printer = [](const tint::Program* program) {
auto result = tint::wgsl::writer::Generate(program, {});
if (!result.error.empty()) {
return "error: " + result.error;
}
return result.wgsl;
};
#endif // TINT_BUILD_WGSL_WRITER
if (!ParseArgs(args, &options)) {
std::cerr << "Failed to parse arguments." << std::endl;
return 1;
}
if (options.show_help) {
std::cout << kUsage << std::endl;
return 0;
}
// Implement output format defaults.
if (options.format == Format::kUnknown) {
options.format = Format::kSpirv;
}
auto diag_printer = tint::diag::Printer::create(stderr, true);
tint::diag::Formatter diag_formatter;
std::unique_ptr<tint::Program> program;
std::unique_ptr<tint::Source::File> source_file;
if (options.loop == Looper::kLoad) {
if (options.input_filename.size() > 5 &&
options.input_filename.substr(options.input_filename.size() - 5) == ".wgsl") {
#if TINT_BUILD_WGSL_READER
std::vector<uint8_t> data;
if (!tint::cmd::ReadFile<uint8_t>(options.input_filename, &data)) {
exit(1);
}
source_file = std::make_unique<tint::Source::File>(
options.input_filename, std::string(data.begin(), data.end()));
uint32_t loop_count = options.loop_count;
for (uint32_t i = 0; i < loop_count; ++i) {
program =
std::make_unique<tint::Program>(tint::reader::wgsl::Parse(source_file.get()));
}
#else
std::cerr << "Tint not built with the WGSL reader enabled" << std::endl;
exit(1);
#endif // TINT_BUILD_WGSL_READER
} else {
#if TINT_BUILD_SPV_READER
std::vector<uint32_t> data;
if (!tint::cmd::ReadFile<uint32_t>(options.input_filename, &data)) {
exit(1);
}
uint32_t loop_count = options.loop_count;
for (uint32_t i = 0; i < loop_count; ++i) {
program = std::make_unique<tint::Program>(tint::reader::spirv::Parse(data, {}));
}
#else
std::cerr << "Tint not built with the SPIR-V reader enabled" << std::endl;
exit(1);
#endif // TINT_BUILD_SPV_READER
}
}
// Load the program that will actually be used
{
tint::cmd::LoadProgramOptions opts;
opts.filename = options.input_filename;
auto info = tint::cmd::LoadProgramInfo(opts);
program = std::move(info.program);
source_file = std::move(info.source_file);
}
#if TINT_BUILD_IR
{
uint32_t loop_count = 1;
if (options.loop == Looper::kIRGenerate) {
loop_count = options.loop_count;
}
for (uint32_t i = 0; i < loop_count; ++i) {
auto result = tint::ir::FromProgram(program.get());
if (!result) {
std::cerr << "Failed to build IR from program: " << result.Failure() << std::endl;
}
}
}
#endif // TINT_BUILD_IR
bool success = false;
{
uint32_t loop_count = 1;
if (options.loop == Looper::kWriter) {
loop_count = options.loop_count;
}
switch (options.format) {
case Format::kSpirv:
for (uint32_t i = 0; i < loop_count; ++i) {
success = GenerateSpirv(program.get());
}
break;
case Format::kWgsl:
for (uint32_t i = 0; i < loop_count; ++i) {
success = GenerateWgsl(program.get());
}
break;
case Format::kMsl:
for (uint32_t i = 0; i < loop_count; ++i) {
success = GenerateMsl(program.get());
}
break;
case Format::kHlsl:
for (uint32_t i = 0; i < loop_count; ++i) {
success = GenerateHlsl(program.get());
}
break;
case Format::kGlsl:
for (uint32_t i = 0; i < loop_count; ++i) {
success = GenerateGlsl(program.get());
}
break;
case Format::kNone:
break;
default:
std::cerr << "Unknown output format specified" << std::endl;
return 1;
}
}
if (!success) {
return 1;
}
return 0;
}