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

// Copyright 2024 The Dawn & Tint Authors
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#include "src/tint/lang/core/type/sampled_texture.h"
#include "src/tint/lang/glsl/writer/helper_test.h"

#include "gmock/gmock.h"

namespace tint::glsl::writer {
namespace {

using namespace tint::core::fluent_types;     // NOLINT
using namespace tint::core::number_suffixes;  // NOLINT

TEST_F(GlslWriterTest, StripAllNames) {
    auto* str =
        ty.Struct(mod.symbols.New("MyStruct"), {
                                                   {mod.symbols.Register("a"), ty.i32()},
                                                   {mod.symbols.Register("b"), ty.vec4<i32>()},
                                               });
    auto* foo = b.Function("foo", ty.u32());
    auto* param = b.FunctionParam("param", ty.u32());
    foo->AppendParam(param);
    b.Append(foo->Block(), [&] {  //
        b.Return(foo, param);
    });

    auto* func = b.ComputeFunction("main");
    auto* idx = b.FunctionParam("idx", ty.u32());
    idx->SetBuiltin(core::BuiltinValue::kLocalInvocationIndex);
    func->AppendParam(idx);
    b.Append(func->Block(), [&] {  //
        auto* var = b.Var("str", ty.ptr<function>(str));
        auto* val = b.Load(var);
        mod.SetName(val, "val");
        auto* a = b.Access<i32>(val, 0_u);
        mod.SetName(a, "a");
        b.Let("let", b.Call<u32>(foo, idx));
        b.Return(func);
    });

    Options options;
    options.strip_all_names = true;
    ASSERT_TRUE(Generate(options)) << err_ << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(

struct tint_struct {
  int member_0;
  ivec4 member_1;
};

uint v(uint v_1) {
  return v_1;
}
void v_2(uint v_3) {
  tint_struct v_4 = tint_struct(0, ivec4(0));
  uint v_5 = v(v_3);
}
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
  v_2(gl_LocalInvocationIndex);
}
)");
}

TEST_F(GlslWriterTest, StripAllNames_CombinedTextureSamplerName) {
    BindingPoint texture_bp{1, 2};
    BindingPoint sampler_bp{3, 4};
    auto* tex_ty = ty.sampled_texture(core::type::TextureDimension::k2d, ty.f32());
    auto* texture = b.Var("texture", ty.ptr<handle>(tex_ty));
    auto* sampler = b.Var("sampler", ty.ptr<handle>(ty.sampler()));
    texture->SetBindingPoint(texture_bp.group, texture_bp.binding);
    sampler->SetBindingPoint(sampler_bp.group, sampler_bp.binding);
    mod.root_block->Append(texture);
    mod.root_block->Append(sampler);

    auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
    b.Append(func->Block(), [&] {  //
        auto* t = b.Load(texture);
        auto* s = b.Load(sampler);
        b.Let("value",
              b.Call<vec4<f32>>(core::BuiltinFn::kTextureSample, t, s, b.Zero<vec2<f32>>()));
        b.Return(func);
    });

    Options options;
    options.strip_all_names = true;
    options.bindings.sampler_texture_to_name.insert(
        {binding::CombinedTextureSamplerPair{texture_bp, sampler_bp},
         "tint_combined_texture_sampler"});
    ASSERT_TRUE(Generate(options)) << err_ << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(precision highp float;
precision highp int;

uniform highp sampler2D tint_combined_texture_sampler;
void main() {
  vec4 v = texture(tint_combined_texture_sampler, vec2(0.0f));
}
)");
}

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