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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/ast/stage_decoration.h"
#include "src/ast/struct_block_decoration.h"
#include "src/ast/variable_decl_statement.h"
#include "src/ast/workgroup_decoration.h"
#include "src/writer/wgsl/test_helper.h"
namespace tint {
namespace writer {
namespace wgsl {
namespace {
using WgslGeneratorImplTest = TestHelper;
TEST_F(WgslGeneratorImplTest, Emit_Function) {
auto* func = Func("my_func", ast::VariableList{}, ty.void_(),
ast::StatementList{
Return(),
},
ast::DecorationList{});
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitFunction(func));
EXPECT_EQ(gen.result(), R"( fn my_func() {
return;
}
)");
}
TEST_F(WgslGeneratorImplTest, Emit_Function_WithParams) {
auto* func = Func(
"my_func", ast::VariableList{Param("a", ty.f32()), Param("b", ty.i32())},
ty.void_(),
ast::StatementList{
Return(),
},
ast::DecorationList{});
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitFunction(func));
EXPECT_EQ(gen.result(), R"( fn my_func(a : f32, b : i32) {
return;
}
)");
}
TEST_F(WgslGeneratorImplTest, Emit_Function_WithDecoration_WorkgroupSize) {
auto* func = Func("my_func", ast::VariableList{}, ty.void_(),
ast::StatementList{Return()},
ast::DecorationList{
Stage(ast::PipelineStage::kCompute),
WorkgroupSize(2, 4, 6),
});
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitFunction(func));
EXPECT_EQ(gen.result(), R"( @stage(compute) @workgroup_size(2, 4, 6)
fn my_func() {
return;
}
)");
}
TEST_F(WgslGeneratorImplTest,
Emit_Function_WithDecoration_WorkgroupSize_WithIdent) {
GlobalConst("height", ty.i32(), Expr(2));
auto* func = Func("my_func", ast::VariableList{}, ty.void_(),
ast::StatementList{Return()},
ast::DecorationList{
Stage(ast::PipelineStage::kCompute),
WorkgroupSize(2, "height"),
});
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitFunction(func));
EXPECT_EQ(gen.result(), R"( @stage(compute) @workgroup_size(2, height)
fn my_func() {
return;
}
)");
}
TEST_F(WgslGeneratorImplTest, Emit_Function_EntryPoint_Parameters) {
auto* vec4 = ty.vec4<f32>();
auto* coord = Param("coord", vec4, {Builtin(ast::Builtin::kPosition)});
auto* loc1 = Param("loc1", ty.f32(), {Location(1u)});
auto* func = Func("frag_main", ast::VariableList{coord, loc1}, ty.void_(),
ast::StatementList{},
ast::DecorationList{
Stage(ast::PipelineStage::kFragment),
});
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitFunction(func));
EXPECT_EQ(gen.result(), R"( @stage(fragment)
fn frag_main(@builtin(position) coord : vec4<f32>, @location(1) loc1 : f32) {
}
)");
}
TEST_F(WgslGeneratorImplTest, Emit_Function_EntryPoint_ReturnValue) {
auto* func = Func("frag_main", ast::VariableList{}, ty.f32(),
ast::StatementList{
Return(1.f),
},
ast::DecorationList{
Stage(ast::PipelineStage::kFragment),
},
ast::DecorationList{
Location(1u),
});
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitFunction(func));
EXPECT_EQ(gen.result(), R"( @stage(fragment)
fn frag_main() -> @location(1) f32 {
return 1.0;
}
)");
}
// https://crbug.com/tint/297
TEST_F(WgslGeneratorImplTest,
Emit_Function_Multiple_EntryPoint_With_Same_ModuleVar) {
// [[block]] struct Data {
// d : f32;
// };
// @binding(0) @group(0) var<storage> data : Data;
//
// @stage(compute) @workgroup_size(1)
// fn a() {
// return;
// }
//
// @stage(compute) @workgroup_size(1)
// fn b() {
// return;
// }
auto* s = Structure("Data", {Member("d", ty.f32())},
{create<ast::StructBlockDecoration>()});
Global("data", ty.Of(s), ast::StorageClass::kStorage, ast::Access::kReadWrite,
ast::DecorationList{
create<ast::BindingDecoration>(0),
create<ast::GroupDecoration>(0),
});
{
auto* var = Var("v", ty.f32(), ast::StorageClass::kNone,
MemberAccessor("data", "d"));
Func("a", ast::VariableList{}, ty.void_(),
ast::StatementList{
Decl(var),
Return(),
},
ast::DecorationList{
Stage(ast::PipelineStage::kCompute),
WorkgroupSize(1),
});
}
{
auto* var = Var("v", ty.f32(), ast::StorageClass::kNone,
MemberAccessor("data", "d"));
Func("b", ast::VariableList{}, ty.void_(),
ast::StatementList{
Decl(var),
Return(),
},
ast::DecorationList{
Stage(ast::PipelineStage::kCompute),
WorkgroupSize(1),
});
}
GeneratorImpl& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.error();
EXPECT_EQ(gen.result(), R"(@block
struct Data {
d : f32;
}
@binding(0) @group(0) var<storage, read_write> data : Data;
@stage(compute) @workgroup_size(1)
fn a() {
var v : f32 = data.d;
return;
}
@stage(compute) @workgroup_size(1)
fn b() {
var v : f32 = data.d;
return;
}
)");
}
} // namespace
} // namespace wgsl
} // namespace writer
} // namespace tint