| // Copyright 2021 The Dawn & Tint Authors |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above copyright notice, this |
| // list of conditions and the following disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // |
| // 3. Neither the name of the copyright holder nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "src/tint/lang/wgsl/ast/transform/clamp_frag_depth.h" |
| |
| #include "src/tint/lang/wgsl/ast/transform/helper_test.h" |
| |
| namespace tint::ast::transform { |
| namespace { |
| |
| using ClampFragDepthTest = ast::transform::TransformTest; |
| |
| TEST_F(ClampFragDepthTest, ShouldRunEmptyModule) { |
| auto* src = R"()"; |
| |
| EXPECT_FALSE(ShouldRun<ClampFragDepth>(src)); |
| } |
| |
| TEST_F(ClampFragDepthTest, ShouldRunNoConfig) { |
| auto* src = R"( |
| @fragment fn main() -> @builtin(frag_depth) f32 { |
| return 0.0; |
| } |
| )"; |
| |
| EXPECT_FALSE(ShouldRun<ClampFragDepth>(src)); |
| } |
| |
| TEST_F(ClampFragDepthTest, ShouldRunNoMinNoMax) { |
| auto* src = R"( |
| @fragment fn main() -> @builtin(frag_depth) f32 { |
| return 0.0; |
| } |
| )"; |
| |
| DataMap config; |
| config.Add<ClampFragDepth::Config>(std::nullopt); |
| |
| EXPECT_FALSE(ShouldRun<ClampFragDepth>(src, config)); |
| } |
| |
| TEST_F(ClampFragDepthTest, ShouldRun) { |
| auto* src = R"( |
| @fragment fn main() -> @builtin(frag_depth) f32 { |
| return 0.0; |
| } |
| )"; |
| |
| DataMap config; |
| config.Add<ClampFragDepth::Config>(tint::DepthRangeOffsets{0, 4}); |
| |
| EXPECT_TRUE(ShouldRun<ClampFragDepth>(src, config)); |
| } |
| |
| TEST_F(ClampFragDepthTest, ExistingPushConstant) { |
| auto* src = R"( |
| enable chromium_experimental_push_constant; |
| |
| struct PushConstants { |
| a : f32, |
| } |
| |
| var<push_constant> push_constants : PushConstants; |
| @fragment fn main() -> @builtin(frag_depth) f32 { |
| return push_constants.a; |
| } |
| |
| )"; |
| |
| auto* expect = R"( |
| enable chromium_experimental_push_constant; |
| |
| struct PushConstants_1 { |
| a : f32, |
| /* @offset(4) */ |
| min_depth : f32, |
| /* @offset(8) */ |
| max_depth : f32, |
| } |
| |
| fn clamp_frag_depth(v : f32) -> f32 { |
| return clamp(v, push_constants.min_depth, push_constants.max_depth); |
| } |
| |
| struct PushConstants { |
| a : f32, |
| } |
| |
| var<push_constant> push_constants : PushConstants_1; |
| |
| @fragment |
| fn main() -> @builtin(frag_depth) f32 { |
| return clamp_frag_depth(push_constants.a); |
| } |
| )"; |
| |
| DataMap config; |
| config.Add<ClampFragDepth::Config>(tint::DepthRangeOffsets{4, 8}); |
| |
| auto got = Run<ClampFragDepth>(src, config); |
| EXPECT_EQ(expect, str(got)); |
| } |
| |
| TEST_F(ClampFragDepthTest, ShouldRunFragDepthAsDirectReturn) { |
| auto* src = R"( |
| @fragment fn main() -> @builtin(frag_depth) f32 { |
| return 0.0; |
| } |
| )"; |
| |
| DataMap config; |
| config.Add<ClampFragDepth::Config>(tint::DepthRangeOffsets{0, 4}); |
| |
| EXPECT_TRUE(ShouldRun<ClampFragDepth>(src, config)); |
| } |
| |
| TEST_F(ClampFragDepthTest, ShouldRunFragDepthInStruct) { |
| auto* src = R"( |
| struct S { |
| @location(0) a : f32, |
| @builtin(frag_depth) b : f32, |
| @location(1) c : f32, |
| } |
| @fragment fn main() -> S { |
| return S(); |
| } |
| )"; |
| |
| DataMap config; |
| config.Add<ClampFragDepth::Config>(tint::DepthRangeOffsets{0, 4}); |
| |
| EXPECT_TRUE(ShouldRun<ClampFragDepth>(src, config)); |
| } |
| |
| TEST_F(ClampFragDepthTest, SingleReturnOfFragDepth) { |
| auto* src = R"( |
| @fragment fn main() -> @builtin(frag_depth) f32 { |
| return 0.0; |
| } |
| )"; |
| |
| auto* expect = R"( |
| enable chromium_experimental_push_constant; |
| |
| struct PushConstants { |
| /* @offset(0) */ |
| min_depth : f32, |
| /* @offset(4) */ |
| max_depth : f32, |
| } |
| |
| var<push_constant> push_constants : PushConstants; |
| |
| fn clamp_frag_depth(v : f32) -> f32 { |
| return clamp(v, push_constants.min_depth, push_constants.max_depth); |
| } |
| |
| @fragment |
| fn main() -> @builtin(frag_depth) f32 { |
| return clamp_frag_depth(0.0); |
| } |
| )"; |
| |
| DataMap config; |
| config.Add<ClampFragDepth::Config>(tint::DepthRangeOffsets{0, 4}); |
| auto got = Run<ClampFragDepth>(src, config); |
| EXPECT_EQ(expect, str(got)); |
| } |
| |
| TEST_F(ClampFragDepthTest, MultipleReturnOfFragDepth) { |
| auto* src = R"( |
| @fragment fn main() -> @builtin(frag_depth) f32 { |
| if (false) { |
| return 1.0; |
| } |
| return 0.0; |
| } |
| )"; |
| |
| auto* expect = R"( |
| enable chromium_experimental_push_constant; |
| |
| struct PushConstants { |
| /* @offset(0) */ |
| min_depth : f32, |
| /* @offset(4) */ |
| max_depth : f32, |
| } |
| |
| var<push_constant> push_constants : PushConstants; |
| |
| fn clamp_frag_depth(v : f32) -> f32 { |
| return clamp(v, push_constants.min_depth, push_constants.max_depth); |
| } |
| |
| @fragment |
| fn main() -> @builtin(frag_depth) f32 { |
| if (false) { |
| return clamp_frag_depth(1.0); |
| } |
| return clamp_frag_depth(0.0); |
| } |
| )"; |
| |
| DataMap config; |
| config.Add<ClampFragDepth::Config>(tint::DepthRangeOffsets{0, 4}); |
| auto got = Run<ClampFragDepth>(src, config); |
| EXPECT_EQ(expect, str(got)); |
| } |
| |
| TEST_F(ClampFragDepthTest, OtherFunctionWithoutFragDepth) { |
| auto* src = R"( |
| @fragment fn main() -> @builtin(frag_depth) f32 { |
| return 0.0; |
| } |
| @fragment fn other() -> @location(0) f32 { |
| return 0.0; |
| } |
| )"; |
| |
| auto* expect = R"( |
| enable chromium_experimental_push_constant; |
| |
| struct PushConstants { |
| /* @offset(0) */ |
| min_depth : f32, |
| /* @offset(4) */ |
| max_depth : f32, |
| } |
| |
| var<push_constant> push_constants : PushConstants; |
| |
| fn clamp_frag_depth(v : f32) -> f32 { |
| return clamp(v, push_constants.min_depth, push_constants.max_depth); |
| } |
| |
| @fragment |
| fn main() -> @builtin(frag_depth) f32 { |
| return clamp_frag_depth(0.0); |
| } |
| |
| @fragment |
| fn other() -> @location(0) f32 { |
| return 0.0; |
| } |
| )"; |
| |
| DataMap config; |
| config.Add<ClampFragDepth::Config>(tint::DepthRangeOffsets{0, 4}); |
| auto got = Run<ClampFragDepth>(src, config); |
| EXPECT_EQ(expect, str(got)); |
| } |
| |
| TEST_F(ClampFragDepthTest, SimpleReturnOfStruct) { |
| auto* src = R"( |
| struct S { |
| @builtin(frag_depth) frag_depth : f32, |
| } |
| |
| @fragment fn main() -> S { |
| return S(0.0); |
| } |
| )"; |
| |
| auto* expect = R"( |
| enable chromium_experimental_push_constant; |
| |
| struct PushConstants { |
| /* @offset(0) */ |
| min_depth : f32, |
| /* @offset(4) */ |
| max_depth : f32, |
| } |
| |
| var<push_constant> push_constants : PushConstants; |
| |
| fn clamp_frag_depth(v : f32) -> f32 { |
| return clamp(v, push_constants.min_depth, push_constants.max_depth); |
| } |
| |
| struct S { |
| @builtin(frag_depth) |
| frag_depth : f32, |
| } |
| |
| fn clamp_frag_depth_S(s : S) -> S { |
| return S(clamp_frag_depth(s.frag_depth)); |
| } |
| |
| @fragment |
| fn main() -> S { |
| return clamp_frag_depth_S(S(0.0)); |
| } |
| )"; |
| |
| DataMap config; |
| config.Add<ClampFragDepth::Config>(tint::DepthRangeOffsets{0, 4}); |
| auto got = Run<ClampFragDepth>(src, config); |
| EXPECT_EQ(expect, str(got)); |
| } |
| |
| TEST_F(ClampFragDepthTest, MixOfFunctionReturningStruct) { |
| auto* src = R"( |
| struct S { |
| @builtin(frag_depth) frag_depth : f32, |
| } |
| struct S2 { |
| @builtin(frag_depth) frag_depth : f32, |
| } |
| |
| @fragment fn returnS() -> S { |
| return S(0.0); |
| } |
| @fragment fn againReturnS() -> S { |
| return S(0.0); |
| } |
| @fragment fn returnS2() -> S2 { |
| return S2(0.0); |
| } |
| )"; |
| |
| // clamp_frag_depth_S is emitted only once. |
| // S2 gets its own clamping function. |
| auto* expect = R"( |
| enable chromium_experimental_push_constant; |
| |
| struct PushConstants { |
| /* @offset(0) */ |
| min_depth : f32, |
| /* @offset(4) */ |
| max_depth : f32, |
| } |
| |
| var<push_constant> push_constants : PushConstants; |
| |
| fn clamp_frag_depth(v : f32) -> f32 { |
| return clamp(v, push_constants.min_depth, push_constants.max_depth); |
| } |
| |
| struct S { |
| @builtin(frag_depth) |
| frag_depth : f32, |
| } |
| |
| struct S2 { |
| @builtin(frag_depth) |
| frag_depth : f32, |
| } |
| |
| fn clamp_frag_depth_S(s : S) -> S { |
| return S(clamp_frag_depth(s.frag_depth)); |
| } |
| |
| @fragment |
| fn returnS() -> S { |
| return clamp_frag_depth_S(S(0.0)); |
| } |
| |
| @fragment |
| fn againReturnS() -> S { |
| return clamp_frag_depth_S(S(0.0)); |
| } |
| |
| fn clamp_frag_depth_S2(s : S2) -> S2 { |
| return S2(clamp_frag_depth(s.frag_depth)); |
| } |
| |
| @fragment |
| fn returnS2() -> S2 { |
| return clamp_frag_depth_S2(S2(0.0)); |
| } |
| )"; |
| |
| DataMap config; |
| config.Add<ClampFragDepth::Config>(tint::DepthRangeOffsets{0, 4}); |
| auto got = Run<ClampFragDepth>(src, config); |
| EXPECT_EQ(expect, str(got)); |
| } |
| |
| TEST_F(ClampFragDepthTest, ComplexIOStruct) { |
| auto* src = R"( |
| struct S { |
| @location(0) blou : vec4<f32>, |
| @location(1) bi : vec4<f32>, |
| @builtin(frag_depth) frag_depth : f32, |
| @location(2) boul : i32, |
| @builtin(sample_mask) ga : u32, |
| } |
| |
| @fragment fn main() -> S { |
| return S(vec4<f32>(), vec4<f32>(), 0.0, 1, 0u); |
| } |
| )"; |
| |
| auto* expect = R"( |
| enable chromium_experimental_push_constant; |
| |
| struct PushConstants { |
| /* @offset(0) */ |
| min_depth : f32, |
| /* @offset(4) */ |
| max_depth : f32, |
| } |
| |
| var<push_constant> push_constants : PushConstants; |
| |
| fn clamp_frag_depth(v : f32) -> f32 { |
| return clamp(v, push_constants.min_depth, push_constants.max_depth); |
| } |
| |
| struct S { |
| @location(0) |
| blou : vec4<f32>, |
| @location(1) |
| bi : vec4<f32>, |
| @builtin(frag_depth) |
| frag_depth : f32, |
| @location(2) |
| boul : i32, |
| @builtin(sample_mask) |
| ga : u32, |
| } |
| |
| fn clamp_frag_depth_S(s : S) -> S { |
| return S(s.blou, s.bi, clamp_frag_depth(s.frag_depth), s.boul, s.ga); |
| } |
| |
| @fragment |
| fn main() -> S { |
| return clamp_frag_depth_S(S(vec4<f32>(), vec4<f32>(), 0.0, 1, 0u)); |
| } |
| )"; |
| |
| DataMap config; |
| config.Add<ClampFragDepth::Config>(tint::DepthRangeOffsets{0, 4}); |
| auto got = Run<ClampFragDepth>(src, config); |
| EXPECT_EQ(expect, str(got)); |
| } |
| |
| } // namespace |
| } // namespace tint::ast::transform |