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// Copyright 2021 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 "src/tint/lang/glsl/writer/writer.h"
#include <memory>
#include "src/tint/lang/glsl/writer/ast_printer/ast_printer.h"
#include "src/tint/lang/wgsl/ast/transform/binding_remapper.h"
#include "src/tint/lang/wgsl/ast/transform/combine_samplers.h"
namespace tint::glsl::writer {
Result<Output, std::string> Generate(const Program* program,
const Options& options,
const std::string& entry_point) {
if (!program->IsValid()) {
return std::string("input program is not valid");
}
// Sanitize the program.
auto sanitized_result = Sanitize(program, options, entry_point);
if (!sanitized_result.program.IsValid()) {
return sanitized_result.program.Diagnostics().str();
}
// Generate the GLSL code.
auto impl = std::make_unique<ASTPrinter>(&sanitized_result.program, options.version);
if (!impl->Generate()) {
return impl->Diagnostics().str();
}
Output output;
output.glsl = impl->Result();
// Collect the list of entry points in the sanitized program.
for (auto* func : sanitized_result.program.AST().Functions()) {
if (func->IsEntryPoint()) {
auto name = func->name->symbol.Name();
output.entry_points.push_back({name, func->PipelineStage()});
}
}
return output;
}
} // namespace tint::glsl::writer