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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/ast/stage_attribute.h"
#include "src/tint/ast/variable_decl_statement.h"
#include "src/tint/sem/sampled_texture.h"
#include "src/tint/writer/wgsl/test_helper.h"
using namespace tint::number_suffixes; // NOLINT
namespace tint::writer::wgsl {
namespace {
using WgslGeneratorImplTest = TestHelper;
TEST_F(WgslGeneratorImplTest, Emit_GlobalDeclAfterFunction) {
auto* func_var = Var("a", ty.f32());
WrapInFunction(func_var);
GlobalVar("a", ty.f32(), ast::StorageClass::kPrivate);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.Generate()) << gen.error();
EXPECT_EQ(gen.result(), R"( @compute @workgroup_size(1i, 1i, 1i)
fn test_function() {
var a : f32;
}
var<private> a : f32;
)");
}
TEST_F(WgslGeneratorImplTest, Emit_GlobalsInterleaved) {
GlobalVar("a0", ty.f32(), ast::StorageClass::kPrivate);
auto* s0 = Structure("S0", {Member("a", ty.i32())});
Func("func", {}, ty.f32(),
{
Return("a0"),
},
{});
GlobalVar("a1", ty.f32(), ast::StorageClass::kPrivate);
auto* s1 = Structure("S1", {Member("a", ty.i32())});
Func("main", {}, ty.void_(),
{
Decl(Var("s0", ty.Of(s0))),
Decl(Var("s1", ty.Of(s1))),
Assign("a1", Call("func")),
},
{
Stage(ast::PipelineStage::kCompute),
WorkgroupSize(1_i),
});
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.Generate()) << gen.error();
EXPECT_EQ(gen.result(), R"( var<private> a0 : f32;
struct S0 {
a : i32,
}
fn func() -> f32 {
return a0;
}
var<private> a1 : f32;
struct S1 {
a : i32,
}
@compute @workgroup_size(1i)
fn main() {
var s0 : S0;
var s1 : S1;
a1 = func();
}
)");
}
TEST_F(WgslGeneratorImplTest, Emit_Global_Sampler) {
GlobalVar("s", ty.sampler(ast::SamplerKind::kSampler),
ast::AttributeList{
create<ast::GroupAttribute>(0u),
create<ast::BindingAttribute>(0u),
});
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.Generate()) << gen.error();
EXPECT_EQ(gen.result(), " @group(0) @binding(0) var s : sampler;\n");
}
TEST_F(WgslGeneratorImplTest, Emit_Global_Texture) {
auto* st = ty.sampled_texture(ast::TextureDimension::k1d, ty.f32());
GlobalVar("t", st,
ast::AttributeList{
create<ast::GroupAttribute>(0u),
create<ast::BindingAttribute>(0u),
});
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.Generate()) << gen.error();
EXPECT_EQ(gen.result(), " @group(0) @binding(0) var t : texture_1d<f32>;\n");
}
TEST_F(WgslGeneratorImplTest, Emit_GlobalConst) {
GlobalConst("explicit", ty.f32(), Expr(1_f));
GlobalConst("inferred", nullptr, Expr(1_f));
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.Generate()) << gen.error();
EXPECT_EQ(gen.result(), R"( const explicit : f32 = 1.0f;
const inferred = 1.0f;
)");
}
TEST_F(WgslGeneratorImplTest, Emit_OverridableConstants) {
Override("a", ty.f32(), nullptr);
Override("b", ty.f32(), nullptr, {Id(7u)});
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.Generate()) << gen.error();
EXPECT_EQ(gen.result(), R"( override a : f32;
@id(7) override b : f32;
)");
}
} // namespace
} // namespace tint::writer::wgsl