[dxvk] Recreate buffer views if necessary

Fixes broken animations and artifacts in The Witcher 3.

src/dxvk/dxvk_buffer.cpp

@@ -21,9 +21,9 @@ namespace dxvk {
   }
   
   
-  void DxvkBuffer::rename(
-    const DxvkPhysicalBufferSlice& slice) {
+  void DxvkBuffer::rename(const DxvkPhysicalBufferSlice& slice) {
     m_physSlice = slice;
+    m_revision += 1;
   }
   
   
@@ -68,36 +68,29 @@ namespace dxvk {
     const Rc<vk::DeviceFn>&         vkd,
     const Rc<DxvkBuffer>&           buffer,
     const DxvkBufferViewCreateInfo& info)
-  : m_vkd(vkd), m_buffer(buffer), m_info(info) {
-    this->createBufferView();
+  : m_vkd(vkd), m_info(info), m_buffer(buffer),
+    m_physView(this->createView()),
+    m_revision(m_buffer->m_revision) {
+    
   }
   
   
   DxvkBufferView::~DxvkBufferView() {
-    this->destroyBufferView();
+    
   }
   
   
-  void DxvkBufferView::createBufferView() {
-    auto physicalSlice = this->slice();
-    
-    VkBufferViewCreateInfo viewInfo;
-    viewInfo.sType  = VK_STRUCTURE_TYPE_BUFFER_VIEW_CREATE_INFO;
-    viewInfo.pNext  = nullptr;
-    viewInfo.flags  = 0;
-    viewInfo.buffer = physicalSlice.handle();
-    viewInfo.format = m_info.format;
-    viewInfo.offset = physicalSlice.offset();
-    viewInfo.range  = physicalSlice.length();
-    
-    if (m_vkd->vkCreateBufferView(m_vkd->device(), &viewInfo, nullptr, &m_view) != VK_SUCCESS)
-      throw DxvkError("DxvkBufferView::DxvkBufferView: Failed to create buffer view");
+  void DxvkBufferView::updateView() {
+    if (m_revision != m_buffer->m_revision) {
+      m_physView = this->createView();
+      m_revision = m_buffer->m_revision;
+    }
   }
   
   
-  void DxvkBufferView::destroyBufferView() {
-    m_vkd->vkDestroyBufferView(
-      m_vkd->device(), m_view, nullptr);
+  Rc<DxvkPhysicalBufferView> DxvkBufferView::createView() {
+    return new DxvkPhysicalBufferView(
+      m_vkd, m_buffer->slice(), m_info);
   }
   
 }

src/dxvk/dxvk_buffer.h

@@ -12,7 +12,7 @@ namespace dxvk {
    * if allocated on an appropriate memory type.
    */
   class DxvkBuffer : public RcObject {
-    
+    friend class DxvkBufferView;
   public:
     
     DxvkBuffer(
@@ -126,6 +126,7 @@ namespace dxvk {
     DxvkBufferCreateInfo    m_info;
     VkMemoryPropertyFlags   m_memFlags;
     DxvkPhysicalBufferSlice m_physSlice;
+    uint32_t                m_revision = 0;
     
     // TODO maybe align this to a cache line in order
     // to avoid false sharing once CSMT is implemented
@@ -150,7 +151,7 @@ namespace dxvk {
    * contents like formatted pixel data. These
    * buffer views are used as texel buffers.
    */
-  class DxvkBufferView : public DxvkResource {
+  class DxvkBufferView : public RcObject {
     
   public:
     
@@ -166,7 +167,7 @@ namespace dxvk {
      * \returns Buffer view handle
      */
     VkBufferView handle() const {
-      return m_view;
+      return m_physView->handle();
     }
     
     /**
@@ -189,8 +190,16 @@ namespace dxvk {
      * \brief Backing resource
      * \returns Backing resource
      */
-    Rc<DxvkResource> resource() const {
-      return m_buffer->resource();
+    Rc<DxvkResource> viewResource() const {
+      return m_physView;
+    }
+    
+    /**
+     * \brief Backing buffer resource
+     * \returns Backing buffer resource
+     */
+    Rc<DxvkResource> bufferResource() const {
+      return m_physView->slice().resource();
     }
     
     /**
@@ -198,21 +207,30 @@ namespace dxvk {
      * \returns Slice backing the view
      */
     DxvkPhysicalBufferSlice slice() const {
-      return m_buffer->subSlice(
-        m_info.rangeOffset,
-        m_info.rangeLength);
+      return m_physView->slice();
     }
     
+    /**
+     * \brief Updates the buffer view
+     * 
+     * If the buffer has been invalidated ever since
+     * the view was created, the view is invalid as
+     * well and needs to be re-created. Call this
+     * prior to using the buffer view handle.
+     */
+    void updateView();
+    
   private:
     
-    Rc<vk::DeviceFn>  m_vkd;
-    Rc<DxvkBuffer>    m_buffer;
+    Rc<vk::DeviceFn>           m_vkd;
+    DxvkBufferViewCreateInfo   m_info;
     
-    DxvkBufferViewCreateInfo m_info;
-    VkBufferView             m_view;
+    Rc<DxvkBuffer>             m_buffer;
+    Rc<DxvkPhysicalBufferView> m_physView;
     
-    void createBufferView();
-    void destroyBufferView();
+    uint32_t                   m_revision = 0;
+    
+    Rc<DxvkPhysicalBufferView> createView();
     
   };
   

src/dxvk/dxvk_context.cpp

@@ -1483,8 +1483,6 @@ namespace dxvk {
     
     bool updatePipelineState = false;
     
-    // TODO recreate resource views if the underlying
-    // resource was marked as dirty after invalidation
     for (uint32_t i = 0; i < layout->bindingCount(); i++) {
       const auto& binding = layout->binding(i);
       const auto& res     = m_rc[binding.slot];
@@ -1534,10 +1532,11 @@ namespace dxvk {
           if (res.bufferView != nullptr) {
             updatePipelineState |= bs.setBound(i);
             
+            res.bufferView->updateView();
             m_descInfos[i].texelBuffer = res.bufferView->handle();
             
-            m_cmd->trackResource(res.bufferView);
-            m_cmd->trackResource(res.bufferView->resource());
+            m_cmd->trackResource(res.bufferView->viewResource());
+            m_cmd->trackResource(res.bufferView->bufferResource());
           } else {
             updatePipelineState |= bs.setUnbound(i);
             m_descInfos[i].texelBuffer = m_device->dummyBufferViewDescriptor();