[dxvk] Add methods to query source access type for an accessed resource

src/dxvk/dxvk_barrier.cpp

@@ -128,6 +128,43 @@ namespace dxvk {
   }
 
 
+  DxvkAccessFlags DxvkBarrierSet::getBufferAccess(
+    const DxvkBufferSliceHandle&    bufSlice) {
+    DxvkAccessFlags access = getAccessTypes(m_srcAccess);
+
+    for (uint32_t i = 0; i < m_bufSlices.size(); i++) {
+      const DxvkBufferSliceHandle& dstSlice = m_bufSlices[i].slice;
+
+      if ((bufSlice.handle == dstSlice.handle)
+       && (bufSlice.offset + bufSlice.length > dstSlice.offset)
+       && (bufSlice.offset < dstSlice.offset + dstSlice.length))
+        access = access | m_bufSlices[i].access;
+    }
+
+    return access;
+  }
+
+  
+  DxvkAccessFlags DxvkBarrierSet::getImageAccess(
+    const Rc<DxvkImage>&            image,
+    const VkImageSubresourceRange&  imgSubres) {
+    DxvkAccessFlags access = getAccessTypes(m_srcAccess & image->info().access);
+
+    for (uint32_t i = 0; i < m_imgSlices.size(); i++) {
+      const VkImageSubresourceRange& dstSubres = m_imgSlices[i].subres;
+
+      if ((image == m_imgSlices[i].image)
+       && (imgSubres.baseArrayLayer < dstSubres.baseArrayLayer + dstSubres.layerCount)
+       && (imgSubres.baseArrayLayer + imgSubres.layerCount     > dstSubres.baseArrayLayer)
+       && (imgSubres.baseMipLevel   < dstSubres.baseMipLevel   + dstSubres.levelCount)
+       && (imgSubres.baseMipLevel   + imgSubres.levelCount     > dstSubres.baseMipLevel))
+        access = access | m_imgSlices[i].access;
+    }
+
+    return access;
+  }
+
+
   void DxvkBarrierSet::recordCommands(const Rc<DxvkCommandList>& commandList) {
     if (m_srcStages | m_dstStages) {
       VkPipelineStageFlags srcFlags = m_srcStages;

src/dxvk/dxvk_barrier.h

@@ -52,6 +52,17 @@ namespace dxvk {
       const VkImageSubresourceRange&  imgSubres,
             DxvkAccessFlags           imgAccess);
     
+    DxvkAccessFlags getBufferAccess(
+      const DxvkBufferSliceHandle&    bufSlice);
+    
+    DxvkAccessFlags getImageAccess(
+      const Rc<DxvkImage>&            image,
+      const VkImageSubresourceRange&  imgSubres);
+    
+    VkPipelineStageFlags getSrcStages() {
+      return m_srcStages;
+    }
+    
     void recordCommands(
       const Rc<DxvkCommandList>&      commandList);