3 files changed, 199 insertions, 0 deletions

diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt
index 47290cbcb..c80171fe6 100644
--- a/src/video_core/CMakeLists.txt
+++ b/src/video_core/CMakeLists.txt
@@ -163,6 +163,8 @@ if (ENABLE_VULKAN)
         renderer_vulkan/vk_image.h
         renderer_vulkan/vk_memory_manager.cpp
         renderer_vulkan/vk_memory_manager.h
+        renderer_vulkan/vk_renderpass_cache.cpp
+        renderer_vulkan/vk_renderpass_cache.h
         renderer_vulkan/vk_resource_manager.cpp
         renderer_vulkan/vk_resource_manager.h
         renderer_vulkan/vk_sampler_cache.cpp
diff --git a/src/video_core/renderer_vulkan/vk_renderpass_cache.cpp b/src/video_core/renderer_vulkan/vk_renderpass_cache.cpp
new file mode 100644
index 000000000..93f5d7ba0
--- /dev/null
+++ b/src/video_core/renderer_vulkan/vk_renderpass_cache.cpp
@@ -0,0 +1,100 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <memory>
+#include <vector>
+
+#include "video_core/engines/maxwell_3d.h"
+#include "video_core/renderer_vulkan/declarations.h"
+#include "video_core/renderer_vulkan/maxwell_to_vk.h"
+#include "video_core/renderer_vulkan/vk_device.h"
+#include "video_core/renderer_vulkan/vk_renderpass_cache.h"
+
+namespace Vulkan {
+
+VKRenderPassCache::VKRenderPassCache(const VKDevice& device) : device{device} {}
+
+VKRenderPassCache::~VKRenderPassCache() = default;
+
+vk::RenderPass VKRenderPassCache::GetRenderPass(const RenderPassParams& params) {
+    const auto [pair, is_cache_miss] = cache.try_emplace(params);
+    auto& entry = pair->second;
+    if (is_cache_miss) {
+        entry = CreateRenderPass(params);
+    }
+    return *entry;
+}
+
+UniqueRenderPass VKRenderPassCache::CreateRenderPass(const RenderPassParams& params) const {
+    std::vector<vk::AttachmentDescription> descriptors;
+    std::vector<vk::AttachmentReference> color_references;
+
+    for (std::size_t rt = 0; rt < params.color_attachments.size(); ++rt) {
+        const auto attachment = params.color_attachments[rt];
+        const auto format =
+            MaxwellToVK::SurfaceFormat(device, FormatType::Optimal, attachment.pixel_format);
+        ASSERT_MSG(format.attachable, "Trying to attach a non-attachable format with format={}",
+                   static_cast<u32>(attachment.pixel_format));
+
+        // TODO(Rodrigo): Add eMayAlias when it's needed.
+        const auto color_layout = attachment.is_texception
+                                      ? vk::ImageLayout::eGeneral
+                                      : vk::ImageLayout::eColorAttachmentOptimal;
+        descriptors.emplace_back(vk::AttachmentDescriptionFlagBits::eMayAlias, format.format,
+                                 vk::SampleCountFlagBits::e1, vk::AttachmentLoadOp::eLoad,
+                                 vk::AttachmentStoreOp::eStore, vk::AttachmentLoadOp::eDontCare,
+                                 vk::AttachmentStoreOp::eDontCare, color_layout, color_layout);
+        color_references.emplace_back(static_cast<u32>(rt), color_layout);
+    }
+
+    vk::AttachmentReference zeta_attachment_ref;
+    if (params.has_zeta) {
+        const auto format =
+            MaxwellToVK::SurfaceFormat(device, FormatType::Optimal, params.zeta_pixel_format);
+        ASSERT_MSG(format.attachable, "Trying to attach a non-attachable format with format={}",
+                   static_cast<u32>(params.zeta_pixel_format));
+
+        const auto zeta_layout = params.zeta_texception
+                                     ? vk::ImageLayout::eGeneral
+                                     : vk::ImageLayout::eDepthStencilAttachmentOptimal;
+        descriptors.emplace_back(vk::AttachmentDescriptionFlags{}, format.format,
+                                 vk::SampleCountFlagBits::e1, vk::AttachmentLoadOp::eLoad,
+                                 vk::AttachmentStoreOp::eStore, vk::AttachmentLoadOp::eLoad,
+                                 vk::AttachmentStoreOp::eStore, zeta_layout, zeta_layout);
+        zeta_attachment_ref =
+            vk::AttachmentReference(static_cast<u32>(params.color_attachments.size()), zeta_layout);
+    }
+
+    const vk::SubpassDescription subpass_description(
+        {}, vk::PipelineBindPoint::eGraphics, 0, nullptr, static_cast<u32>(color_references.size()),
+        color_references.data(), nullptr, params.has_zeta ? &zeta_attachment_ref : nullptr, 0,
+        nullptr);
+
+    vk::AccessFlags access;
+    vk::PipelineStageFlags stage;
+    if (!color_references.empty()) {
+        access |=
+            vk::AccessFlagBits::eColorAttachmentRead | vk::AccessFlagBits::eColorAttachmentWrite;
+        stage |= vk::PipelineStageFlagBits::eColorAttachmentOutput;
+    }
+
+    if (params.has_zeta) {
+        access |= vk::AccessFlagBits::eDepthStencilAttachmentRead |
+                  vk::AccessFlagBits::eDepthStencilAttachmentWrite;
+        stage |= vk::PipelineStageFlagBits::eLateFragmentTests;
+    }
+
+    const vk::SubpassDependency subpass_dependency(VK_SUBPASS_EXTERNAL, 0, stage, stage, {}, access,
+                                                   {});
+
+    const vk::RenderPassCreateInfo create_info({}, static_cast<u32>(descriptors.size()),
+                                               descriptors.data(), 1, &subpass_description, 1,
+                                               &subpass_dependency);
+
+    const auto dev = device.GetLogical();
+    const auto& dld = device.GetDispatchLoader();
+    return dev.createRenderPassUnique(create_info, nullptr, dld);
+}
+
+} // namespace Vulkan
diff --git a/src/video_core/renderer_vulkan/vk_renderpass_cache.h b/src/video_core/renderer_vulkan/vk_renderpass_cache.h
new file mode 100644
index 000000000..b49b2db48
--- /dev/null
+++ b/src/video_core/renderer_vulkan/vk_renderpass_cache.h
@@ -0,0 +1,97 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <tuple>
+#include <unordered_map>
+
+#include <boost/container/static_vector.hpp>
+#include <boost/functional/hash.hpp>
+
+#include "video_core/engines/maxwell_3d.h"
+#include "video_core/renderer_vulkan/declarations.h"
+#include "video_core/surface.h"
+
+namespace Vulkan {
+
+class VKDevice;
+
+// TODO(Rodrigo): Optimize this structure for faster hashing
+
+struct RenderPassParams {
+    struct ColorAttachment {
+        u32 index = 0;
+        VideoCore::Surface::PixelFormat pixel_format = VideoCore::Surface::PixelFormat::Invalid;
+        bool is_texception = false;
+
+        std::size_t Hash() const noexcept {
+            return static_cast<std::size_t>(pixel_format) |
+                   static_cast<std::size_t>(is_texception) << 6 |
+                   static_cast<std::size_t>(index) << 7;
+        }
+
+        bool operator==(const ColorAttachment& rhs) const noexcept {
+            return std::tie(index, pixel_format, is_texception) ==
+                   std::tie(rhs.index, rhs.pixel_format, rhs.is_texception);
+        }
+    };
+
+    boost::container::static_vector<ColorAttachment,
+                                    Tegra::Engines::Maxwell3D::Regs::NumRenderTargets>
+        color_attachments{};
+    // TODO(Rodrigo): Unify has_zeta into zeta_pixel_format and zeta_component_type.
+    VideoCore::Surface::PixelFormat zeta_pixel_format = VideoCore::Surface::PixelFormat::Invalid;
+    bool has_zeta = false;
+    bool zeta_texception = false;
+
+    std::size_t Hash() const noexcept {
+        std::size_t hash = 0;
+        for (const auto& rt : color_attachments) {
+            boost::hash_combine(hash, rt.Hash());
+        }
+        boost::hash_combine(hash, zeta_pixel_format);
+        boost::hash_combine(hash, has_zeta);
+        boost::hash_combine(hash, zeta_texception);
+        return hash;
+    }
+
+    bool operator==(const RenderPassParams& rhs) const {
+        return std::tie(color_attachments, zeta_pixel_format, has_zeta, zeta_texception) ==
+               std::tie(rhs.color_attachments, rhs.zeta_pixel_format, rhs.has_zeta,
+                        rhs.zeta_texception);
+    }
+};
+
+} // namespace Vulkan
+
+namespace std {
+
+template <>
+struct hash<Vulkan::RenderPassParams> {
+    std::size_t operator()(const Vulkan::RenderPassParams& k) const noexcept {
+        return k.Hash();
+    }
+};
+
+} // namespace std
+
+namespace Vulkan {
+
+class VKRenderPassCache final {
+public:
+    explicit VKRenderPassCache(const VKDevice& device);
+    ~VKRenderPassCache();
+
+    vk::RenderPass GetRenderPass(const RenderPassParams& params);
+
+private:
+    UniqueRenderPass CreateRenderPass(const RenderPassParams& params) const;
+
+    const VKDevice& device;
+    std::unordered_map<RenderPassParams, UniqueRenderPass> cache;
+};
+
+} // namespace Vulkan