[dxvk] Optimize retrieval of dynamic buffer offsets

src/dxvk/dxvk_buffer.h

@@ -80,6 +80,16 @@ namespace dxvk {
       return m_physSlice.getDescriptor(offset, length, keepOffset);
     }
 
+    /**
+     * \brief Retrieves dynamic offset
+     * 
+     * \param [in] offset Offset into the buffer
+     * \returns Physical buffer slice offset
+     */
+    VkDeviceSize getDynamicOffset(VkDeviceSize offset) const {
+      return m_physSlice.getDynamicOffset(offset);
+    }
+    
     /**
      * \brief Underlying buffer resource
      * 
@@ -270,6 +280,16 @@ namespace dxvk {
       return m_buffer->getDescriptor(m_offset, m_length, keepOffset);
     }
 
+    /**
+     * \brief Retrieves dynamic offset
+     * 
+     * Used for descriptor set binding.
+     * \returns Buffer slice offset
+     */
+    VkDeviceSize getDynamicOffset() const {
+      return m_buffer->getDynamicOffset(m_offset);
+    }
+    
     /**
      * \brief Pointer to mapped memory region
      * 

src/dxvk/dxvk_buffer_res.h

@@ -197,6 +197,16 @@ namespace dxvk {
       return m_buffer->getDescriptor(offset, length);
     }
 
+    /**
+     * \brief Retrieves dynamic offset
+     * 
+     * \param [in] offset Offset into the slice
+     * \returns Physical buffer slice offset
+     */
+    VkDeviceSize getDynamicOffset(VkDeviceSize offset) const {
+      return m_offset + offset;
+    }
+    
     /**
      * \brief Map pointer
      * 

src/dxvk/dxvk_context.cpp

@@ -2305,7 +2305,7 @@ namespace dxvk {
         const auto& res     = m_rc[binding.slot];
 
         m_descOffsets[i] = res.bufferSlice.defined()
-          ? res.bufferSlice.physicalSlice().offset()
+          ? res.bufferSlice.getDynamicOffset()
           : 0;
       }