[dxvk] Introduce bindResourceBufferRange

src/dxvk/dxvk_buffer.h

@@ -518,7 +518,18 @@ namespace dxvk {
       return this->m_offset == other.m_offset
           && this->m_length == other.m_length;
     }
-    
+
+    /**
+     * \brief Sets buffer range
+     *
+     * \param [in] offset New offset
+     * \param [in] length New length
+     */
+    void setRange(VkDeviceSize offset, VkDeviceSize length) {
+      m_offset = offset;
+      m_length = length;
+    }
+
   private:
     
     Rc<DxvkBuffer> m_buffer = nullptr;

src/dxvk/dxvk_context.h

@@ -165,6 +165,22 @@ namespace dxvk {
       m_descriptorState.dirtyBuffers(stages);
     }
     
+    /**
+     * \brief Changes bound range of a resource buffer
+     * 
+     * Can be used to quickly bind a new sub-range of
+     * a buffer rather than re-binding the entire buffer.
+     */
+    void bindResourceBufferRange(
+            VkShaderStageFlags    stages,
+            uint32_t              slot,
+            VkDeviceSize          offset,
+            VkDeviceSize          length) {
+      m_rc[slot].bufferSlice.setRange(offset, length);
+
+      m_descriptorState.dirtyBuffers(stages);
+    }
+    
     /**
      * \brief Binds image or buffer view
      *