src/tint/lang/glsl/writer/function_test.cc

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#include "src/tint/lang/glsl/writer/helper_test.h"

namespace tint::glsl::writer {
namespace {

TEST_F(GlslWriterTest, Function_Empty) {
    auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kCompute);
    func->SetWorkgroupSize(1, 1, 1);
    func->Block()->Append(b.Return(func));

    Options opts{};
    ASSERT_TRUE(Generate(opts, tint::ast::PipelineStage::kCompute)) << err_ << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
}
)");
}

TEST_F(GlslWriterTest, FunctionWithParams) {
    auto* func = b.Function("my_func", ty.void_());
    func->SetParams({b.FunctionParam("a", ty.f32()), b.FunctionParam("b", ty.i32())});
    func->Block()->Append(b.Return(func));

    ASSERT_TRUE(Generate()) << err_ << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(
void my_func(float a, int b) {
}
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
}
)");
}

TEST_F(GlslWriterTest, Function_Fragment_Precision) {
    auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
    func->Block()->Append(b.Return(func));

    ASSERT_TRUE(Generate()) << err_ << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(precision highp float;
precision highp int;

void main() {
}
)");
}

}  // namespace
}  // namespace tint::glsl::writer