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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 "src/sem/variable.h"
#include "src/writer/wgsl/test_helper.h"
namespace tint {
namespace writer {
namespace wgsl {
namespace {
using WgslGeneratorImplTest = TestHelper;
TEST_F(WgslGeneratorImplTest, Generate) {
Func("my_func", ast::VariableList{}, ty.void_(), ast::StatementList{},
ast::DecorationList{});
GeneratorImpl& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.error();
EXPECT_EQ(gen.result(), R"(fn my_func() {
}
)");
}
struct WgslBuiltinData {
ast::Builtin builtin;
const char* attribute_name;
};
inline std::ostream& operator<<(std::ostream& out, WgslBuiltinData data) {
out << data.builtin;
return out;
}
using WgslBuiltinConversionTest = TestParamHelper<WgslBuiltinData>;
TEST_P(WgslBuiltinConversionTest, Emit) {
auto params = GetParam();
auto* var = Global("a", ty.f32(), ast::StorageClass::kPrivate, nullptr,
ast::DecorationList{
Builtin(params.builtin),
});
GeneratorImpl& gen = Build();
gen.EmitDecorations(var->decorations());
EXPECT_EQ(gen.result(),
"[[builtin(" + std::string(params.attribute_name) + ")]]");
}
INSTANTIATE_TEST_SUITE_P(
WgslGeneratorImplTest,
WgslBuiltinConversionTest,
testing::Values(
WgslBuiltinData{ast::Builtin::kPosition, "position"},
WgslBuiltinData{ast::Builtin::kVertexIndex, "vertex_index"},
WgslBuiltinData{ast::Builtin::kInstanceIndex, "instance_index"},
WgslBuiltinData{ast::Builtin::kFrontFacing, "front_facing"},
WgslBuiltinData{ast::Builtin::kFragDepth, "frag_depth"},
WgslBuiltinData{ast::Builtin::kLocalInvocationId,
"local_invocation_id"},
WgslBuiltinData{ast::Builtin::kLocalInvocationIndex,
"local_invocation_index"},
WgslBuiltinData{ast::Builtin::kGlobalInvocationId,
"global_invocation_id"},
WgslBuiltinData{ast::Builtin::kWorkgroupId, "workgroup_id"},
WgslBuiltinData{ast::Builtin::kSampleIndex, "sample_index"}));
} // namespace
} // namespace wgsl
} // namespace writer
} // namespace tint