vk: Refactor framebuffers

- Refactor out framebuffers from the renderer core
- Use a proper cache with sorted queues for faster searching

rpcs3/Emu/RSX/VK/VKFramebuffer.cpp

@@ -0,0 +1,90 @@
+#include "stdafx.h"
+
+#include "VKFramebuffer.h"
+
+namespace vk
+{
+	std::unordered_map<u64, std::vector<std::unique_ptr<vk::framebuffer_holder>>> g_framebuffers_cache;
+
+	vk::framebuffer_holder *get_framebuffer(VkDevice dev, u16 width, u16 height, VkRenderPass renderpass, const std::vector<vk::image*>& image_list)
+	{
+		u64 key = u64(width) | (u64(height) << 16);
+		auto &queue = g_framebuffers_cache[key];
+
+		for (auto &fbo : queue)
+		{
+			if (fbo->matches(image_list, width, height))
+			{
+				return fbo.get();
+			}
+		}
+
+		std::vector<std::unique_ptr<vk::image_view>> image_views;
+		image_views.reserve(image_list.size());
+
+		for (auto &e : image_list)
+		{
+			const VkImageSubresourceRange subres = { e->aspect(), 0, 1, 0, 1 };
+			image_views.push_back(std::make_unique<vk::image_view>(dev, e, vk::default_component_map(), subres));
+		}
+
+		auto value = std::make_unique<vk::framebuffer_holder>(dev, renderpass, width, height, std::move(image_views));
+		auto ret = value.get();
+
+		queue.push_back(std::move(value));
+		return ret;
+	}
+
+	vk::framebuffer_holder* get_framebuffer(VkDevice dev, u16 width, u16 height, VkRenderPass renderpass, VkFormat format, VkImage attachment)
+	{
+		u64 key = u64(width) | (u64(height) << 16);
+		auto &queue = g_framebuffers_cache[key];
+
+		for (const auto &e : queue)
+		{
+			if (e->attachments[0]->info.image == attachment)
+			{
+				return e.get();
+			}
+		}
+
+		VkImageSubresourceRange range = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
+		std::vector<std::unique_ptr<vk::image_view>> views;
+
+		views.push_back(std::make_unique<vk::image_view>(dev, attachment, VK_IMAGE_VIEW_TYPE_2D, format, vk::default_component_map(), range));
+		auto value = std::make_unique<vk::framebuffer_holder>(dev, renderpass, width, height, std::move(views));
+		auto ret = value.get();
+
+		queue.push_back(std::move(value));
+		return ret;
+	}
+
+	void remove_unused_framebuffers()
+	{
+		// Remove stale framebuffers. Ref counted to prevent use-after-free
+		for (auto It = g_framebuffers_cache.begin(); It != g_framebuffers_cache.end();)
+		{
+			It->second.erase(
+				std::remove_if(It->second.begin(), It->second.end(), [](const auto& fbo)
+				{
+					return (fbo->unused_check_count() >= 2);
+				}),
+				It->second.end()
+			);
+
+			if (It->second.empty())
+			{
+				It = g_framebuffers_cache.erase(It);
+			}
+			else
+			{
+				++It;
+			}
+		}
+	}
+
+	void clear_framebuffer_cache()
+	{
+		g_framebuffers_cache.clear();
+	}
+}