kc3-lang/angle/src/tests/compiler_tests/OES_sample_variables_test.cpp

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• Hash : 02ae054c
  Author :
  Date : 2025-04-07T13:48:29
  

  Translator: Fix init of inactive output variables
  
  Bug: chromium:398401939
  Change-Id: I0df494b945b8d0e805a62cf7645d06bf233f36ca
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6438495
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  

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• src/tests/compiler_tests/OES_sample_variables_test.cpp

• //
  // Copyright 2020 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // OES_sample_variables_test.cpp:
  //   Test for OES_sample_variables
  //
  
  #include "tests/test_utils/ShaderExtensionTest.h"
  
  namespace
  {
  const char OESPragma[] = "#extension GL_OES_sample_variables : require\n";
  
  // Shader using gl_SampleMask with non-constant index
  // This shader is in the deqp test
  // (functional_shaders_sample_variables_sample_mask_discard_half_per_sample_default_framebuffer)
  const char ESSL310_GLSampleMaskShader[] =
      R"(
      layout(location = 0) out mediump vec4 fragColor;
      void main (void)
      {
          for (int i = 0; i < gl_SampleMask.length(); ++i)
                  gl_SampleMask[i] = int(0xAAAAAAAA);
  
          // force per-sample shading
          highp float blue = float(gl_SampleID);
  
          fragColor = vec4(0.0, 1.0, blue, 1.0);
      })";
  
  // Shader using gl_SampleMask with non-constant index
  // This shader is based on the deqp test on below
  // (functional_shaders_sample_variables_sample_mask_in_bit_count_per_sample_multisample_texture_2)
  const char ESSL310_GLSampleMaskInShader[] =
      R"(
      layout(location = 0) out mediump vec4 fragColor;
      void main (void)
      {
          mediump int maskBitCount = 0;
          for (int j = 0; j < gl_SampleMaskIn.length(); ++j)
          {
              for (int i = 0; i < 32; ++i)
              {
                  if (((gl_SampleMaskIn[j] >> i) & 0x01) == 0x01)
                  {
                      ++maskBitCount;
                  }
              }
          }
  
          // force per-sample shading
          highp float blue = float(gl_SampleID);
  
          if (maskBitCount != 1)
              fragColor = vec4(1.0, 0.0, blue, 1.0);
          else
              fragColor = vec4(0.0, 1.0, blue, 1.0);
      })";
  
  class OESSampleVariablesTest : public sh::ShaderExtensionTest
  {
    public:
      void InitializeCompiler() { InitializeCompiler(SH_GLSL_450_CORE_OUTPUT); }
      void InitializeCompiler(ShShaderOutput shaderOutputType)
      {
          DestroyCompiler();
  
          if (shaderOutputType == SH_SPIRV_VULKAN_OUTPUT || shaderOutputType == SH_MSL_METAL_OUTPUT)
          {
              mCompileOptions.removeInactiveVariables = true;
          }
          mCompiler = sh::ConstructCompiler(GL_FRAGMENT_SHADER, testing::get<0>(GetParam()),
                                            shaderOutputType, &mResources);
          ASSERT_TRUE(mCompiler != nullptr) << "Compiler could not be constructed.";
      }
  
      testing::AssertionResult TestShaderCompile(const char *pragma)
      {
          const char *shaderStrings[] = {testing::get<1>(GetParam()), pragma,
                                         testing::get<2>(GetParam())};
  
          bool success = sh::Compile(mCompiler, shaderStrings, 3, mCompileOptions);
          if (success)
          {
              return ::testing::AssertionSuccess() << "Compilation success";
          }
          return ::testing::AssertionFailure() << sh::GetInfoLog(mCompiler);
      }
  };
  
  // GLES3 needs OES_sample_variables extension
  class OESSampleVariablesTestES31 : public OESSampleVariablesTest
  {};
  
  // Extension flag is required to compile properly. Expect failure when it is
  // not present.
  TEST_P(OESSampleVariablesTestES31, CompileFailsWithoutExtension)
  {
      mResources.OES_sample_variables = 0;
      InitializeCompiler();
      EXPECT_FALSE(TestShaderCompile(OESPragma));
  }
  
  // Extension directive is required to compile properly. Expect failure when
  // it is not present.
  TEST_P(OESSampleVariablesTestES31, CompileFailsWithExtensionWithoutPragma)
  {
      mResources.OES_sample_variables = 1;
      InitializeCompiler();
      EXPECT_FALSE(TestShaderCompile(""));
  }
  
  // With extension flag and extension directive, compiling succeeds.
  // Also test that the extension directive state is reset correctly.
  #ifdef ANGLE_ENABLE_VULKAN
  TEST_P(OESSampleVariablesTestES31, CompileSucceedsWithExtensionAndPragmaOnVulkan)
  {
      mResources.OES_sample_variables = 1;
      InitializeCompiler(SH_SPIRV_VULKAN_OUTPUT);
      EXPECT_TRUE(TestShaderCompile(OESPragma));
      // Test reset functionality.
      EXPECT_FALSE(TestShaderCompile(""));
      EXPECT_TRUE(TestShaderCompile(OESPragma));
  }
  #endif
  
  INSTANTIATE_TEST_SUITE_P(CorrectESSL310Shaders,
                           OESSampleVariablesTestES31,
                           Combine(Values(SH_GLES3_1_SPEC),
                                   Values(sh::ESSLVersion310),
                                   Values(ESSL310_GLSampleMaskShader, ESSL310_GLSampleMaskInShader)));
  
  }  // anonymous namespace
  

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