[dxvk] Refactor render pass objects to not use reference counting

Like pipeline objects, we keep these around anyway so there's no
reason to add ref count overhead. Also use a hash map to perform
the lookup.

src/dxvk/dxvk_framebuffer.cpp

@@ -4,7 +4,7 @@ namespace dxvk {
   
   DxvkFramebuffer::DxvkFramebuffer(
     const Rc<vk::DeviceFn>&       vkd,
-    const Rc<DxvkRenderPass>&     renderPass,
+          DxvkRenderPass*         renderPass,
     const DxvkRenderTargets&      renderTargets,
     const DxvkFramebufferSize&    defaultSize)
   : m_vkd           (vkd),

src/dxvk/dxvk_framebuffer.h

@@ -56,7 +56,7 @@ namespace dxvk {
     
     DxvkFramebuffer(
       const Rc<vk::DeviceFn>&       vkd,
-      const Rc<DxvkRenderPass>&     renderPass,
+            DxvkRenderPass*         renderPass,
       const DxvkRenderTargets&      renderTargets,
       const DxvkFramebufferSize&    defaultSize);
     
@@ -204,7 +204,7 @@ namespace dxvk {
   private:
     
     const Rc<vk::DeviceFn>    m_vkd;
-    const Rc<DxvkRenderPass>  m_renderPass;
+          DxvkRenderPass*     m_renderPass;
     const DxvkRenderTargets   m_renderTargets;
     const DxvkFramebufferSize m_renderSize;
     

src/dxvk/dxvk_renderpass.cpp

@@ -4,7 +4,7 @@
 
 namespace dxvk {
   
-  bool DxvkRenderPassFormat::matches(const DxvkRenderPassFormat& fmt) const {
+  bool DxvkRenderPassFormat::eq(const DxvkRenderPassFormat& fmt) const {
     bool eq = sampleCount == fmt.sampleCount;
     
     for (uint32_t i = 0; i < MaxNumRenderTargets && eq; i++) {
@@ -17,6 +17,21 @@ namespace dxvk {
     
     return eq;
   }
+
+
+  size_t DxvkRenderPassFormat::hash() const {
+    DxvkHashState state;
+    state.add(uint32_t(sampleCount));
+
+    for (uint32_t i = 0; i < MaxNumRenderTargets; i++) {
+      state.add(uint32_t(color[i].format));
+      state.add(uint32_t(color[i].layout));
+    }
+
+    state.add(uint32_t(depth.format));
+    state.add(uint32_t(depth.layout));
+    return state;
+  }
   
   
   DxvkRenderPass::DxvkRenderPass(
@@ -39,7 +54,7 @@ namespace dxvk {
   
   
   bool DxvkRenderPass::hasCompatibleFormat(const DxvkRenderPassFormat& fmt) const {
-    return m_format.matches(fmt);
+    return m_format.eq(fmt);
   }
   
   
@@ -216,17 +231,17 @@ namespace dxvk {
   }
   
   
-  Rc<DxvkRenderPass> DxvkRenderPassPool::getRenderPass(const DxvkRenderPassFormat& fmt) {
+  DxvkRenderPass* DxvkRenderPassPool::getRenderPass(const DxvkRenderPassFormat& fmt) {
     std::lock_guard<std::mutex> lock(m_mutex);
+
+    auto entry = m_renderPasses.find(fmt);
+    if (entry != m_renderPasses.end())
+      return &entry->second;
     
-    for (const auto& r : m_renderPasses) {
-      if (r->hasCompatibleFormat(fmt))
-        return r;
-    }
-    
-    Rc<DxvkRenderPass> rp = new DxvkRenderPass(m_vkd, fmt);
-    m_renderPasses.push_back(rp);
-    return rp;
+    auto result = m_renderPasses.emplace(std::piecewise_construct,
+      std::tuple(fmt),
+      std::tuple(m_vkd, fmt));
+    return &result.first->second;
   }
   
 }

src/dxvk/dxvk_renderpass.h

@@ -32,7 +32,9 @@ namespace dxvk {
     DxvkAttachmentFormat  depth;
     DxvkAttachmentFormat  color[MaxNumRenderTargets];
     
-    bool matches(const DxvkRenderPassFormat& fmt) const;
+    bool eq(const DxvkRenderPassFormat& fmt) const;
+
+    size_t hash() const;
   };
   
   
@@ -101,7 +103,7 @@ namespace dxvk {
    * render passes which share the same format but
    * may differ in their attachment operations.
    */
-  class DxvkRenderPass : public RcObject {
+  class DxvkRenderPass {
     
   public:
     
@@ -211,7 +213,7 @@ namespace dxvk {
      * \param [in] fmt The render pass format
      * \returns Matching render pass object
      */
-    Rc<DxvkRenderPass> getRenderPass(
+    DxvkRenderPass* getRenderPass(
       const DxvkRenderPassFormat&  fmt);
     
   private:
@@ -219,7 +221,10 @@ namespace dxvk {
     const Rc<vk::DeviceFn> m_vkd;
     
     std::mutex                      m_mutex;
-    std::vector<Rc<DxvkRenderPass>> m_renderPasses;
+    std::unordered_map<
+      DxvkRenderPassFormat,
+      DxvkRenderPass,
+      DxvkHash, DxvkEq>             m_renderPasses;
     
   };
   

src/dxvk/dxvk_state_cache.cpp

@@ -135,7 +135,7 @@ namespace dxvk {
     for (auto e = entries.first; e != entries.second; e++) {
       const DxvkStateCacheEntry& entry = m_entries[e->second];
 
-      if (entry.format.matches(format) && entry.gpState == state)
+      if (entry.format.eq(format) && entry.gpState == state)
         return;
     }