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// Copyright 2025 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice, this
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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#include "gmock/gmock.h"
#include "src/tint/lang/wgsl/resolver/resolver.h"
#include "src/tint/lang/wgsl/resolver/resolver_helper_test.h"
namespace tint::resolver {
using namespace tint::core::fluent_types; // NOLINT
using namespace tint::core::number_suffixes; // NOLINT
namespace {
using ResolverBarycentricCoordExtensionTest = ResolverTest;
TEST_F(ResolverBarycentricCoordExtensionTest, UseBarycentricCoordWithoutExtensionError) {
Structure("Inputs", Vector{
Member("a", ty.vec3<f32>(),
Vector{Builtin(core::BuiltinValue::kBarycentricCoord)}),
});
EXPECT_FALSE(r()->Resolve());
EXPECT_EQ(
r()->error(),
R"(error: use of '@builtin(barycentric_coord)' requires enabling extension 'chromium_experimental_barycentric_coord')");
}
TEST_F(ResolverBarycentricCoordExtensionTest, UseBarycentricCoordWithExtension) {
Enable(wgsl::Extension::kChromiumExperimentalBarycentricCoord);
Structure("Inputs", Vector{
Member("a", ty.vec3<f32>(),
Vector{Builtin(core::BuiltinValue::kBarycentricCoord)}),
});
EXPECT_TRUE(r()->Resolve()) << r()->error();
}
TEST_F(ResolverBarycentricCoordExtensionTest, BarycentricCoordVec3I32Error) {
Enable(wgsl::Extension::kChromiumExperimentalBarycentricCoord);
Structure("Inputs", Vector{
Member("a", ty.vec3<i32>(),
Vector{Builtin(core::BuiltinValue::kBarycentricCoord)}),
});
EXPECT_FALSE(r()->Resolve());
EXPECT_EQ(r()->error(),
"error: store type of '@builtin(barycentric_coord)' must be 'vec3<f32>'");
}
TEST_F(ResolverBarycentricCoordExtensionTest, BarycentricCoordVertexShader) {
Enable(wgsl::Extension::kChromiumExperimentalBarycentricCoord);
Func(
"main",
Vector{Param("pi", ty.vec3<f32>(), Vector{Builtin(core::BuiltinValue::kBarycentricCoord)})},
ty.void_(), Empty, Vector{Stage(ast::PipelineStage::kVertex)});
EXPECT_FALSE(r()->Resolve());
EXPECT_EQ(r()->error(),
"error: '@builtin(barycentric_coord)' cannot be used for vertex shader input");
}
TEST_F(ResolverBarycentricCoordExtensionTest, BarycentricCoordFragmentShaderOutput) {
Enable(wgsl::Extension::kChromiumExperimentalBarycentricCoord);
Func("main", tint::Empty, ty.vec3<f32>(),
Vector{
Return(Call<vec3<f32>>()),
},
Vector{Stage(ast::PipelineStage::kFragment)},
Vector{Builtin(Source{{1, 2}}, core::BuiltinValue::kBarycentricCoord)});
EXPECT_FALSE(r()->Resolve());
EXPECT_EQ(r()->error(),
"1:2 error: '@builtin(barycentric_coord)' cannot be used for fragment shader output");
}
} // namespace
} // namespace tint::resolver