@@ -271,14 +271,14 @@ bool SamplerStateCache::ConfigureBoundTexture(const SamplerGLES& sampler,
   const uint64_t sampler_key =
       SamplerDescriptor::ToKey(sampler.GetDescriptor());
   const HandleGLES& handle = texture.GetHandle();
-  auto it = configured_samplers.find(handle);
-  if (it != configured_samplers.end() && it->second == sampler_key) {
+  auto it = configured_samplers_.find(handle);
+  if (it != configured_samplers_.end() && it->second == sampler_key) {
     return true;
   }
   if (!sampler.ConfigureBoundTexture(texture, gl)) {
     return false;
   }
-  configured_samplers[handle] = sampler_key;
+  configured_samplers_[handle] = sampler_key;
   return true;
 }
 
 
@@ -12,14 +12,13 @@
 #include "impeller/renderer/backend/gles/gles.h"
 #include "impeller/renderer/backend/gles/handle_gles.h"
 #include "impeller/renderer/backend/gles/proc_table_gles.h"
+#include "impeller/renderer/backend/gles/sampler_gles.h"
+#include "impeller/renderer/backend/gles/texture_gles.h"
 #include "impeller/renderer/command.h"
 #include "third_party/abseil-cpp/absl/container/flat_hash_map.h"
 
 namespace impeller {
 
-class SamplerGLES;
-class TextureGLES;
-
 namespace testing {
 FML_TEST_CLASS(BufferBindingsGLESTest, BindUniformData);
 FML_TEST_CLASS(BufferBindingsGLESTest, BindArrayData);
@@ -37,13 +36,23 @@ FML_TEST_CLASS(BufferBindingsGLESTest,
 /// @brief      Caches the sampler configuration state applied to GL texture
 ///             objects during a render pass.
 ///
-struct SamplerStateCache {
-  absl::flat_hash_map<HandleGLES, uint64_t, HandleGLES::Hash, HandleGLES::Equal>
-      configured_samplers;
+class SamplerStateCache {
+ public:
+  SamplerStateCache() = default;
+
+  ~SamplerStateCache() = default;
 
   bool ConfigureBoundTexture(const SamplerGLES& sampler,
                              const TextureGLES& texture,
                              const ProcTableGLES& gl);
+
+ private:
+  absl::flat_hash_map<HandleGLES, uint64_t, HandleGLES::Hash, HandleGLES::Equal>
+      configured_samplers_;
+
+  SamplerStateCache(const SamplerStateCache&) = delete;
+
+  SamplerStateCache& operator=(const SamplerStateCache&) = delete;
 };
 
 //------------------------------------------------------------------------------
Original file line number	Diff line number	Diff line change
`@@ -271,14 +271,14 @@ bool SamplerStateCache::ConfigureBoundTexture(const SamplerGLES& sampler,`
`271`	`271`	`const uint64_t sampler_key =`
`272`	`272`	`SamplerDescriptor::ToKey(sampler.GetDescriptor());`
`273`	`273`	`const HandleGLES& handle = texture.GetHandle();`
`274`		`- auto it = configured_samplers.find(handle);`
`275`		`- if (it != configured_samplers.end() && it->second == sampler_key) {`
	`274`	`+ auto it = configured_samplers_.find(handle);`
	`275`	`+ if (it != configured_samplers_.end() && it->second == sampler_key) {`
`276`	`276`	`return true;`
`277`	`277`	`}`
`278`	`278`	`if (!sampler.ConfigureBoundTexture(texture, gl)) {`
`279`	`279`	`return false;`
`280`	`280`	`}`
`281`		`- configured_samplers[handle] = sampler_key;`
	`281`	`+ configured_samplers_[handle] = sampler_key;`
`282`	`282`	`return true;`
`283`	`283`	`}`
`284`	`284`