update macos/ios to Filament v1.51.2

ios/include/filament/backend/Program.h

@@ -17,17 +17,19 @@
 #ifndef TNT_FILAMENT_BACKEND_PRIVATE_PROGRAM_H
 #define TNT_FILAMENT_BACKEND_PRIVATE_PROGRAM_H
 
-#include <utils/compiler.h>
 #include <utils/CString.h>
 #include <utils/FixedCapacityVector.h>
 #include <utils/Invocable.h>
-#include <utils/Log.h>
 #include <utils/ostream.h>
 
 #include <backend/DriverEnums.h>
 
-#include <array>
-#include <variant>
+#include <array>    // FIXME: STL headers are not allowed in public headers
+#include <utility>  // FIXME: STL headers are not allowed in public headers
+#include <variant>  // FIXME: STL headers are not allowed in public headers
+
+#include <stddef.h>
+#include <stdint.h>
 
 namespace filament::backend {
 
@@ -114,6 +116,8 @@ public:
 
     Program& cacheId(uint64_t cacheId) noexcept;
 
+    Program& multiview(bool multiview) noexcept;
+
     ShaderSource const& getShadersSource() const noexcept { return mShadersSource; }
     ShaderSource& getShadersSource() noexcept { return mShadersSource; }
 
@@ -141,6 +145,8 @@ public:
 
     uint64_t getCacheId() const noexcept { return mCacheId; }
 
+    bool isMultiview() const noexcept { return mMultiview; }
+
     CompilerPriorityQueue getPriorityQueue() const noexcept { return mPriorityQueue; }
 
 private:
@@ -156,6 +162,11 @@ private:
     utils::FixedCapacityVector<std::pair<utils::CString, uint8_t>> mAttributes;
     std::array<UniformInfo, Program::UNIFORM_BINDING_COUNT> mBindingUniformInfo;
     CompilerPriorityQueue mPriorityQueue = CompilerPriorityQueue::HIGH;
+    // Indicates the current engine was initialized with multiview stereo, and the variant for this
+    // program contains STE flag. This will be referred later for the OpenGL shader compiler to
+    // determine whether shader code replacement for the num_views should be performed.
+    // This variable could be promoted as a more generic variable later if other similar needs occur.
+    bool mMultiview = false;
 };
 
 } // namespace filament::backend