[dxvk] Add resource flag to track graphics pipeline side effects

src/dxvk/dxvk_sparse.h

@@ -580,6 +580,27 @@ namespace dxvk {
       m_trackId = 0u;
     }
 
+    /**
+     * \brief Checks whether the buffer has been used for gfx stores
+     *
+     * \returns \c true if any graphics pipeline has written this
+     *    resource via transform feedback or a storage descriptor.
+     */
+    bool hasGfxStores() const {
+      return m_hasGfxStores;
+    }
+
+    /**
+     * \brief Tracks graphics pipeline side effects
+     *
+     * Must be called whenever the resource is written via graphics
+     * pipeline storage descriptors or transform feedback.
+     * \returns \c true if side effects were already tracked.
+     */
+    bool trackGfxStores() {
+      return std::exchange(m_hasGfxStores, true);
+    }
+
     /**
      * \brief Queries sparse page table
      *
@@ -622,6 +643,8 @@ namespace dxvk {
     uint64_t              m_trackId = { 0u };
     uint64_t              m_cookie = { 0u };
 
+    bool                  m_hasGfxStores = false;
+
     static constexpr uint64_t getIncrement(DxvkAccess access) {
       return uint64_t(1u) << (uint32_t(access) * 20u);
     }