UnitTests: Use glslang to validate GLSL shaders

include/Nazara/Shader/GlslWriter.hpp

@@ -41,7 +41,7 @@ namespace Nz
 				ExtSupportCallback extCallback;
 				unsigned int glMajorVersion = 3;
 				unsigned int glMinorVersion = 0;
-				bool glES = false;
+				bool glES = true;
 				bool flipYPosition = false;
 				bool remapZPosition = false;
 			};

tests/Engine/Shader/AccessMemberTest.cpp

@@ -4,7 +4,6 @@
 #include <Nazara/Shader/ShaderBuilder.hpp>
 #include <Nazara/Shader/ShaderLangParser.hpp>
 #include <catch2/catch.hpp>
-#include <spirv-tools/libspirv.hpp>
 #include <cctype>
 
 SCENARIO("Shader generation", "[Shader]")

tests/Engine/Shader/ShaderUtils.cpp

@@ -6,8 +6,120 @@
 #include <Nazara/Shader/SpirvPrinter.hpp>
 #include <Nazara/Shader/SpirvWriter.hpp>
 #include <catch2/catch.hpp>
+#include <glslang/Public/ShaderLang.h>
 #include <spirv-tools/libspirv.hpp>
 
+namespace
+{
+	// Use OpenGL default minimal values (from https://www.khronos.org/registry/OpenGL-Refpages/es3.0/html/glGet.xhtml, https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGet.xhtml and https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/)
+	const TBuiltInResource s_minResources = {
+		8,      //< maxLights
+		6,      //< maxClipPlanes
+		32,     //< maxTextureUnits
+		32,     //< maxTextureCoords
+		16,     //< maxVertexAttribs
+		1024,   //< maxVertexUniformComponents
+		60,     //< maxVaryingFloats
+		16,     //< maxVertexTextureImageUnits
+		32,     //< maxCombinedTextureImageUnits
+		16,     //< maxTextureImageUnits
+		896,    //< maxFragmentUniformComponents
+		4,      //< maxDrawBuffers
+		256,    //< maxVertexUniformVectors
+		15,     //< maxVaryingVectors
+		224,    //< maxFragmentUniformVectors
+		256,    //< maxVertexOutputVectors
+		224,    //< maxFragmentInputVectors
+		-8,     //< minProgramTexelOffset
+		7,      //< maxProgramTexelOffset
+		8,      //< maxClipDistances
+		0xFFFF, //< maxComputeWorkGroupCountX
+		0xFFFF, //< maxComputeWorkGroupCountY
+		0xFFFF, //< maxComputeWorkGroupCountZ
+		1024,   //< maxComputeWorkGroupSizeX
+		1024,   //< maxComputeWorkGroupSizeY
+		64,     //< maxComputeWorkGroupSizeZ
+		1024,   //< maxComputeUniformComponents
+		16,     //< maxComputeTextureImageUnits
+		8,      //< maxComputeImageUniforms
+		8,      //< maxComputeAtomicCounters
+		1,      //< maxComputeAtomicCounterBuffers
+		60,     //< maxVaryingComponents
+		64,     //< maxVertexOutputComponents
+		64,     //< maxGeometryInputComponents
+		128,    //< maxGeometryOutputComponents
+		128,    //< maxFragmentInputComponents
+		8,      //< maxImageUnits
+		8,      //< maxCombinedImageUnitsAndFragmentOutputs
+		8,      //< maxCombinedShaderOutputResources
+		0,      //< maxImageSamples
+		0,      //< maxVertexImageUniforms
+		0,      //< maxTessControlImageUniforms
+		0,      //< maxTessEvaluationImageUniforms
+		0,      //< maxGeometryImageUniforms
+		8,      //< maxFragmentImageUniforms
+		8,      //< maxCombinedImageUniforms
+		16,     //< maxGeometryTextureImageUnits
+		256,    //< maxGeometryOutputVertices
+		1024,   //< maxGeometryTotalOutputComponents
+		1024,   //< maxGeometryUniformComponents
+		64,     //< maxGeometryVaryingComponents
+		128,    //< maxTessControlInputComponents
+		128,    //< maxTessControlOutputComponents
+		16,     //< maxTessControlTextureImageUnits
+		1024,   //< maxTessControlUniformComponents
+		4096,   //< maxTessControlTotalOutputComponents
+		128,    //< maxTessEvaluationInputComponents
+		128,    //< maxTessEvaluationOutputComponents
+		16,     //< maxTessEvaluationTextureImageUnits
+		1024,   //< maxTessEvaluationUniformComponents
+		120,    //< maxTessPatchComponents
+		32,     //< maxPatchVertices
+		64,     //< maxTessGenLevel
+		16,     //< maxViewports
+		0,      //< maxVertexAtomicCounters
+		0,      //< maxTessControlAtomicCounters
+		0,      //< maxTessEvaluationAtomicCounters
+		0,      //< maxGeometryAtomicCounters
+		8,      //< maxFragmentAtomicCounters
+		8,      //< maxCombinedAtomicCounters
+		1,      //< maxAtomicCounterBindings
+		0,      //< maxVertexAtomicCounterBuffers
+		0,      //< maxTessControlAtomicCounterBuffers
+		0,      //< maxTessEvaluationAtomicCounterBuffers
+		0,      //< maxGeometryAtomicCounterBuffers
+		1,      //< maxFragmentAtomicCounterBuffers
+		1,      //< maxCombinedAtomicCounterBuffers
+		16384,  //< maxAtomicCounterBufferSize
+		4,      //< maxTransformFeedbackBuffers
+		64,     //< maxTransformFeedbackInterleavedComponents
+		8,      //< maxCullDistances
+		8,      //< maxCombinedClipAndCullDistances
+		4,      //< maxSamples
+		256,    //< maxMeshOutputVerticesNV
+		512,    //< maxMeshOutputPrimitivesNV
+		32,     //< maxMeshWorkGroupSizeX_NV
+		1,      //< maxMeshWorkGroupSizeY_NV
+		1,      //< maxMeshWorkGroupSizeZ_NV
+		32,     //< maxTaskWorkGroupSizeX_NV
+		1,      //< maxTaskWorkGroupSizeY_NV
+		1,      //< maxTaskWorkGroupSizeZ_NV
+		4,      //< maxMeshViewCountNV
+		1,      //< maxDualSourceDrawBuffersEXT
+		{       //< limits
+			true, //< nonInductiveForLoops
+			true, //< whileLoops
+			true, //< doWhileLoops
+			true, //< generalUniformIndexing
+			true, //< generalAttributeMatrixVectorIndexing
+			true, //< generalVaryingIndexing
+			true, //< generalSamplerIndexing
+			true, //< generalVariableIndexing
+			true, //< generalConstantMatrixVectorIndexing
+		}
+	};
+}
+
 void ExpectingGLSL(Nz::ShaderAst::Statement& shader, std::string_view expectedOutput)
 {
 	expectedOutput = Nz::Trim(expectedOutput);
@@ -18,9 +130,30 @@ void ExpectingGLSL(Nz::ShaderAst::Statement& shader, std::string_view expectedOu
 	{
 		std::string output = writer.Generate(shader);
 
+		WHEN("Validating expected code")
+		{
 			INFO("full GLSL output:\n" << output << "\nexcepted output:\n" << expectedOutput);
 			REQUIRE(output.find(expectedOutput) != std::string::npos);
 		}
+
+		WHEN("Validating full GLSL code (using glslang)")
+		{
+			glslang::TShader shader(EShLangVertex);
+			shader.setEnvInput(glslang::EShSourceGlsl, EShLangVertex, glslang::EShClientOpenGL, 300);
+			shader.setEnvClient(glslang::EShClientOpenGL, glslang::EShTargetOpenGL_450);
+			shader.setEnvTarget(glslang::EShTargetNone, static_cast<glslang::EShTargetLanguageVersion>(0));
+			shader.setEntryPoint("main");
+
+			const char* source = output.c_str();
+			shader.setStrings(&source, 1);
+
+			if (!shader.parse(&s_minResources, 100, false, static_cast<EShMessages>(EShMsgDefault | EShMsgKeepUncalled)))
+			{
+				INFO("full GLSL output:\n" << output << "\nerror:\n" << shader.getInfoLog());
+				REQUIRE(false);
+			}
+		}
+	}
 }
 
 void ExpectingNZSL(Nz::ShaderAst::Statement& shader, std::string_view expectedOutput)
@@ -33,12 +166,18 @@ void ExpectingNZSL(Nz::ShaderAst::Statement& shader, std::string_view expectedOu
 	{
 		std::string output = writer.Generate(shader);
 
+		WHEN("Validating expected code")
+		{
 			INFO("full NZSL output:\n" << output << "\nexcepted output:\n" << expectedOutput);
 			REQUIRE(output.find(expectedOutput) != std::string::npos);
+		}
 
+		WHEN("Validating full NZSL code (by recompiling it)")
+		{
 			// validate NZSL by recompiling it
 			REQUIRE_NOTHROW(Nz::ShaderLang::Parse(output));
 		}
+	}
 }
 
 void ExpectingSpirV(Nz::ShaderAst::Statement& shader, std::string_view expectedOutput)
@@ -57,9 +196,14 @@ void ExpectingSpirV(Nz::ShaderAst::Statement& shader, std::string_view expectedO
 		auto spirv = writer.Generate(shader);
 		std::string output = printer.Print(spirv.data(), spirv.size(), settings);
 
+		WHEN("Validating expected code")
+		{
 			INFO("full SPIRV output:\n" << output << "\nexcepted output:\n" << expectedOutput);
 			REQUIRE(output.find(expectedOutput) != std::string::npos);
+		}
 
+		WHEN("Validating full SPIRV code (using libspirv)")
+		{
 			// validate SPIRV with libspirv
 			spvtools::SpirvTools spirvTools(spv_target_env::SPV_ENV_VULKAN_1_0);
 			spirvTools.SetMessageConsumer([&](spv_message_level_t /*level*/, const char* /*source*/, const spv_position_t& /*position*/, const char* message)
@@ -73,4 +217,5 @@ void ExpectingSpirV(Nz::ShaderAst::Statement& shader, std::string_view expectedO
 
 			REQUIRE(spirvTools.Validate(spirv));
 		}
+	}
 }

tests/main.cpp

@@ -7,12 +7,18 @@
 #include <Nazara/Network/Network.hpp>
 #include <Nazara/Physics2D/Physics2D.hpp>
 #include <Nazara/Shader/Shader.hpp>
+#include <glslang/Public/ShaderLang.h>
 
 int main(int argc, char* argv[])
 {
 	Nz::Modules<Nz::Network, Nz::Physics2D, Nz::Shader> nazaza;
 
+	if (!glslang::InitializeProcess())
+		return EXIT_FAILURE;
+
 	int result = Catch::Session().run(argc, argv);
 
+	glslang::FinalizeProcess();
+
 	return result;
 }

tests/xmake.lua

@@ -3,14 +3,14 @@ if is_mode("asan") then
 	add_defines("CATCH_CONFIG_NO_POSIX_SIGNALS")
 end
 
-add_requires("catch2", "spirv-tools")
+add_requires("catch2", "glslang", "spirv-tools")
 
 -- Common config
 set_group("Tests")
 set_kind("binary")
 
 add_deps("NazaraCore", "NazaraNetwork", "NazaraPhysics2D", "NazaraShader")
-add_packages("catch2", "spirv-tools")
+add_packages("catch2", "glslang", "spirv-tools")
 add_headerfiles("Engine/**.hpp")
 add_files("resources.cpp")
 add_files("Engine/**.cpp")