Vulkan: Use cache for sampler objects

src/Cafe/HW/Latte/Core/LattePerformanceMonitor.h

@@ -124,6 +124,7 @@ typedef struct
 		LattePerfStatCounter numGraphicPipelines;
 		LattePerfStatCounter numImages;
 		LattePerfStatCounter numImageViews;
+		LattePerfStatCounter numSamplers;
 		LattePerfStatCounter numRenderPass;
 		LattePerfStatCounter numFramebuffer;
 

src/Cafe/HW/Latte/Renderer/Vulkan/VKRBase.h

@@ -19,7 +19,7 @@ public:
 
 	virtual ~VKRMoveableRefCounter()
 	{
-		cemu_assert_debug(refCount == 0);
+		cemu_assert_debug(m_refCount == 0);
 
 		// remove references
 #ifdef CEMU_DEBUG_ASSERT
@@ -30,7 +30,11 @@ public:
 		}
 #endif
 		for (auto itr : refs)
-			itr->ref->refCount--;
+		{
+			itr->ref->m_refCount--;
+			if (itr->ref->m_refCount == 0)
+				itr->ref->RefCountReachedZero();
+		}
 		refs.clear();
 		delete selfRef;
 		selfRef = nullptr;
@@ -41,8 +45,8 @@ public:
 	VKRMoveableRefCounter(VKRMoveableRefCounter&& rhs) noexcept
 	{
 		this->refs = std::move(rhs.refs);
-		this->refCount = rhs.refCount;
-		rhs.refCount = 0;
+		this->m_refCount = rhs.m_refCount;
+		rhs.m_refCount = 0;
 		this->selfRef = rhs.selfRef;
 		rhs.selfRef = nullptr;
 		this->selfRef->ref = this;
@@ -57,7 +61,7 @@ public:
 	void addRef(VKRMoveableRefCounter* refTarget)
 	{
 		this->refs.emplace_back(refTarget->selfRef);
-		refTarget->refCount++;
+		refTarget->m_refCount++;
 
 #ifdef CEMU_DEBUG_ASSERT
 		// add reverse ref
@@ -68,16 +72,23 @@ public:
 	// methods to directly increment/decrement ref counter (for situations where no external object is available)
 	void incRef()
 	{
-		this->refCount++;
+		m_refCount++;
 	}
 
 	void decRef()
 	{
-		this->refCount--;
+		m_refCount--;
+		if (m_refCount == 0)
+			RefCountReachedZero();
 	}
 
 protected:
-	int refCount{};
+  	virtual void RefCountReachedZero()
+	{
+		// does nothing by default
+	}
+
+	int m_refCount{};
 private:
 	VKRMoveableRefCounterRef* selfRef;
 	std::vector<VKRMoveableRefCounterRef*> refs;
@@ -88,7 +99,7 @@ private:
 	void moveObj(VKRMoveableRefCounter&& rhs)
 	{
 		this->refs = std::move(rhs.refs);
-		this->refCount = rhs.refCount;
+		this->m_refCount = rhs.m_refCount;
 		this->selfRef = rhs.selfRef;
 		this->selfRef->ref = this;
 	}
@@ -131,6 +142,25 @@ public:
 	VkSampler m_textureDefaultSampler[2] = { VK_NULL_HANDLE, VK_NULL_HANDLE }; // relict from LatteTextureViewVk, get rid of it eventually
 };
 
+
+class VKRObjectSampler : public VKRDestructibleObject
+{
+  public:
+	VKRObjectSampler(VkSamplerCreateInfo* samplerInfo);
+	~VKRObjectSampler() override;
+
+	static VKRObjectSampler* GetOrCreateSampler(VkSamplerCreateInfo* samplerInfo);
+	static void DestroyCache();
+
+	void RefCountReachedZero() override; // sampler objects are destroyed when not referenced anymore
+
+	VkSampler GetSampler() const { return m_sampler; }
+  private:
+	static std::unordered_map<uint64, VKRObjectSampler*> s_samplerCache;
+	VkSampler m_sampler{ VK_NULL_HANDLE };
+	uint64 m_hash;
+};
+
 class VKRObjectRenderPass : public VKRDestructibleObject
 {
 public:

src/Cafe/HW/Latte/Renderer/Vulkan/VulkanRenderer.cpp

@@ -672,6 +672,8 @@ VulkanRenderer::~VulkanRenderer()
 	if (m_commandPool != VK_NULL_HANDLE)
 		vkDestroyCommandPool(m_logicalDevice, m_commandPool, nullptr);
 
+	VKRObjectSampler::DestroyCache();
+
 	// destroy debug callback
 	if (m_debugCallback)
 	{
@@ -3707,6 +3709,7 @@ void VulkanRenderer::AppendOverlayDebugInfo()
 	ImGui::Text("DS StorageBuf  %u", performanceMonitor.vk.numDescriptorStorageBuffers.get());
 	ImGui::Text("Images         %u", performanceMonitor.vk.numImages.get());
 	ImGui::Text("ImageView      %u", performanceMonitor.vk.numImageViews.get());
+	ImGui::Text("ImageSampler   %u", performanceMonitor.vk.numSamplers.get());
 	ImGui::Text("RenderPass     %u", performanceMonitor.vk.numRenderPass.get());
 	ImGui::Text("Framebuffer    %u", performanceMonitor.vk.numFramebuffer.get());
 	m_spinlockDestructionQueue.lock();
@@ -3752,7 +3755,7 @@ void VKRDestructibleObject::flagForCurrentCommandBuffer()
 
 bool VKRDestructibleObject::canDestroy()
 {
-	if (refCount > 0)
+	if (m_refCount > 0)
 		return false;
 	return VulkanRenderer::GetInstance()->HasCommandBufferFinished(m_lastCmdBufferId);
 }
@@ -3793,6 +3796,111 @@ VKRObjectTextureView::~VKRObjectTextureView()
 	performanceMonitor.vk.numImageViews.decrement();
 }
 
+static uint64 CalcHashSamplerCreateInfo(const VkSamplerCreateInfo& info)
+{
+	uint64 h = 0xcbf29ce484222325ULL;
+	auto fnvHashCombine = [](uint64_t &h, auto val) {
+		using T = decltype(val);
+		static_assert(sizeof(T) <= 8);
+		uint64_t val64 = 0;
+		std::memcpy(&val64, &val, sizeof(val));
+		h ^= val64;
+		h *= 0x100000001b3ULL;
+	};
+	cemu_assert_debug(info.sType == VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO);
+	fnvHashCombine(h, info.flags);
+	fnvHashCombine(h, info.magFilter);
+	fnvHashCombine(h, info.minFilter);
+	fnvHashCombine(h, info.mipmapMode);
+	fnvHashCombine(h, info.addressModeU);
+	fnvHashCombine(h, info.addressModeV);
+	fnvHashCombine(h, info.addressModeW);
+	fnvHashCombine(h, info.mipLodBias);
+	fnvHashCombine(h, info.anisotropyEnable);
+	if(info.anisotropyEnable == VK_TRUE)
+		fnvHashCombine(h, info.maxAnisotropy);
+	fnvHashCombine(h, info.compareEnable);
+	if(info.compareEnable == VK_TRUE)
+		fnvHashCombine(h, info.compareOp);
+	fnvHashCombine(h, info.minLod);
+	fnvHashCombine(h, info.maxLod);
+	fnvHashCombine(h, info.borderColor);
+	fnvHashCombine(h, info.unnormalizedCoordinates);
+	// handle custom border color
+	VkBaseOutStructure* ext = (VkBaseOutStructure*)info.pNext;
+	while(ext)
+	{
+		if(ext->sType == VK_STRUCTURE_TYPE_SAMPLER_CUSTOM_BORDER_COLOR_CREATE_INFO_EXT)
+		{
+			auto* extInfo = (VkSamplerCustomBorderColorCreateInfoEXT*)ext;
+			fnvHashCombine(h, extInfo->customBorderColor.uint32[0]);
+			fnvHashCombine(h, extInfo->customBorderColor.uint32[1]);
+			fnvHashCombine(h, extInfo->customBorderColor.uint32[2]);
+			fnvHashCombine(h, extInfo->customBorderColor.uint32[3]);
+		}
+		else
+		{
+			cemu_assert_unimplemented();
+		}
+		ext = ext->pNext;
+	}
+	return h;
+}
+
+std::unordered_map<uint64, VKRObjectSampler*> VKRObjectSampler::s_samplerCache;
+
+VKRObjectSampler::VKRObjectSampler(VkSamplerCreateInfo* samplerInfo)
+{
+	auto* vulkanRenderer = VulkanRenderer::GetInstance();
+	if (vkCreateSampler(vulkanRenderer->GetLogicalDevice(), samplerInfo, nullptr, &m_sampler) != VK_SUCCESS)
+		vulkanRenderer->UnrecoverableError("Failed to create texture sampler");
+	performanceMonitor.vk.numSamplers.increment();
+	m_hash = CalcHashSamplerCreateInfo(*samplerInfo);
+}
+
+VKRObjectSampler::~VKRObjectSampler()
+{
+	vkDestroySampler(VulkanRenderer::GetInstance()->GetLogicalDevice(), m_sampler, nullptr);
+	performanceMonitor.vk.numSamplers.decrement();
+	// remove from cache
+	auto it = s_samplerCache.find(m_hash);
+	if(it != s_samplerCache.end())
+		s_samplerCache.erase(it);
+}
+
+void VKRObjectSampler::RefCountReachedZero()
+{
+	VulkanRenderer::GetInstance()->ReleaseDestructibleObject(this);
+}
+
+VKRObjectSampler* VKRObjectSampler::GetOrCreateSampler(VkSamplerCreateInfo* samplerInfo)
+{
+	auto* vulkanRenderer = VulkanRenderer::GetInstance();
+	uint64 hash = CalcHashSamplerCreateInfo(*samplerInfo);
+	auto it = s_samplerCache.find(hash);
+	if (it != s_samplerCache.end())
+	{
+		auto* sampler = it->second;
+		return sampler;
+	}
+	auto* sampler = new VKRObjectSampler(samplerInfo);
+	s_samplerCache[hash] = sampler;
+	return sampler;
+}
+
+void VKRObjectSampler::DestroyCache()
+{
+	// assuming all other objects which depend on vkSampler are destroyed, this cache should also have been emptied already
+	// but just to be sure lets still clear the cache
+	cemu_assert_debug(s_samplerCache.empty());
+	for(auto& sampler : s_samplerCache)
+	{
+		cemu_assert_debug(sampler.second->m_refCount == 0);
+		delete sampler.second;
+	}
+	s_samplerCache.clear();
+}
+
 VKRObjectRenderPass::VKRObjectRenderPass(AttachmentInfo_t& attachmentInfo, sint32 colorAttachmentCount)
 {
 	// generate helper hash for pipeline state

src/Cafe/HW/Latte/Renderer/Vulkan/VulkanRendererCore.cpp

@@ -727,7 +727,6 @@ VkDescriptorSetInfo* VulkanRenderer::draw_getOrCreateDescriptorSet(PipelineInfo*
 
 		VkSamplerCustomBorderColorCreateInfoEXT samplerCustomBorderColor{};
 
-		VkSampler sampler;
 		VkSamplerCreateInfo samplerInfo{};
 		samplerInfo.sType = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO;
 
@@ -899,10 +898,9 @@ VkDescriptorSetInfo* VulkanRenderer::draw_getOrCreateDescriptorSet(PipelineInfo*
 				}
 			}
 		}
-
-		if (vkCreateSampler(m_logicalDevice, &samplerInfo, nullptr, &sampler) != VK_SUCCESS)
-			UnrecoverableError("Failed to create texture sampler");
-		info.sampler = sampler;
+		VKRObjectSampler* samplerObj = VKRObjectSampler::GetOrCreateSampler(&samplerInfo);
+		vkObjDS->addRef(samplerObj);
+		info.sampler = samplerObj->GetSampler();
 		textureArray.emplace_back(info);
 	}