[D3D12] Fix texture binding hashing

src/xenia/gpu/d3d12/texture_cache.h

@@ -13,6 +13,7 @@
 #include <atomic>
 #include <unordered_map>
 
+#include "xenia/gpu/d3d12/d3d12_shader.h"
 #include "xenia/gpu/d3d12/shared_memory.h"
 #include "xenia/gpu/register_file.h"
 #include "xenia/gpu/texture_info.h"
@@ -72,12 +73,13 @@ class TextureCache {
   // (notifying the command processor about that), so this must be called before
   // binding the actual drawing pipeline.
   void RequestTextures(uint32_t used_vertex_texture_mask,
-                       uint32_t used_pixel_texture_mask,
-                       uint64_t& descriptor_layout_vertex_hash_out,
-                       uint64_t& descriptor_layout_pixel_hash_out);
-  inline uint64_t GetEmptyTextureBindingsHash() const {
-    return texture_bindings_empty_hash_;
-  }
+                       uint32_t used_pixel_texture_mask);
+
+  // Returns the hash of the current bindings (must be called after
+  // RequestTextures) for the provided SRV descriptor layout.
+  uint64_t GetDescriptorHashForActiveTextures(
+      const D3D12Shader::TextureSRV* texture_srvs,
+      uint32_t texture_srv_count) const;
 
   void WriteTextureSRV(uint32_t fetch_constant,
                        TextureDimension shader_dimension,
@@ -371,8 +373,6 @@ class TextureCache {
   std::unordered_multimap<uint64_t, Texture*> textures_;
 
   TextureBinding texture_bindings_[32] = {};
-  // Hash for no textures bound.
-  uint64_t texture_bindings_empty_hash_;
   // Bit vector with bits reset on fetch constant writes to avoid getting
   // texture keys from the fetch constants again and again.
   uint32_t texture_keys_in_sync_ = 0;