vk: Avoid constantly reinitializing the SH context when compiling SPIRV. Speedup

rpcs3/Emu/RSX/VK/VKCommonDecompiler.cpp

@@ -6,6 +6,8 @@
 
 namespace vk
 {
+	static TBuiltInResource g_default_config;
+
 	std::string getFloatTypeNameImpl(size_t elementCount)
 	{
 		switch (elementCount)
@@ -273,20 +275,16 @@ namespace vk
 	{
 		EShLanguage lang = (domain == glsl::glsl_fragment_program) ? EShLangFragment : EShLangVertex;
 
-		glslang::InitializeProcess();
 		glslang::TProgram program;
 		glslang::TShader shader_object(lang);
 		
 		bool success = false;
 		const char *shader_text = shader.data();
 
-		TBuiltInResource rsc;
-		init_default_resources(rsc);
-
 		shader_object.setStrings(&shader_text, 1);
 
 		EShMessages msg = (EShMessages)(EShMsgVulkanRules | EShMsgSpvRules);
-		if (shader_object.parse(&rsc, 400, EProfile::ECoreProfile, false, true, msg))
+		if (shader_object.parse(&g_default_config, 400, EProfile::ECoreProfile, false, true, msg))
 		{
 			program.addShader(&shader_object);
 			success = program.link(EShMsgVulkanRules);
@@ -302,7 +300,17 @@ namespace vk
 			LOG_ERROR(RSX, "%s", shader_object.getInfoDebugLog());
 		}
 
-		glslang::FinalizeProcess();
 		return success;
 	}
+
+	void initialize_compiler_context()
+	{
+		glslang::InitializeProcess();
+		init_default_resources(g_default_config);
+	}
+
+	void finalize_compiler_context()
+	{
+		glslang::FinalizeProcess();
+	}
 }

rpcs3/Emu/RSX/VK/VKCommonDecompiler.h

@@ -17,4 +17,7 @@ namespace vk
 
 	const varying_register_t& get_varying_register(const std::string& name);
 	bool compile_glsl_to_spv(std::string& shader, glsl::program_domain domain, std::vector<u32> &spv);
+
+	void initialize_compiler_context();
+	void finalize_compiler_context();
 }

rpcs3/Emu/RSX/VK/VKGSRender.cpp

@@ -6,6 +6,7 @@
 #include "../rsx_utils.h"
 #include "../Common/BufferUtils.h"
 #include "VKFormats.h"
+#include "VKCommonDecompiler.h"
 
 namespace
 {
@@ -1019,11 +1020,14 @@ void VKGSRender::on_init_thread()
 
 	GSRender::on_init_thread();
 	rsx_thread = std::this_thread::get_id();
+
+	vk::initialize_compiler_context();
 }
 
 void VKGSRender::on_exit()
 {
 	m_texture_cache.destroy();
+	vk::finalize_compiler_context();
 
 	return GSRender::on_exit();
 }