1 files changed, 37 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/common/matrix_utils.h b/src/3rdparty/angle/src/common/matrix_utils.h
index 6f3187c3e8..aa3f89536e 100644
--- a/src/3rdparty/angle/src/common/matrix_utils.h
+++ b/src/3rdparty/angle/src/common/matrix_utils.h
@@ -16,6 +16,7 @@
 #include <vector>
 
 #include "common/debug.h"
+#include "common/mathutil.h"
 
 namespace angle
 {
@@ -337,6 +338,42 @@ class Matrix
         return result;
     }
 
+    void setToIdentity()
+    {
+        ASSERT(rows() == columns());
+
+        const auto one  = T(1);
+        const auto zero = T(0);
+
+        for (auto &e : mElements)
+            e = zero;
+
+        for (unsigned int i = 0; i < rows(); ++i)
+        {
+            const auto pos = i * columns() + (i % columns());
+            mElements[pos] = one;
+        }
+    }
+
+    template <unsigned int Size>
+    static void setToIdentity(T(&matrix)[Size])
+    {
+        static_assert(gl::iSquareRoot<Size>() != 0, "Matrix is not square.");
+
+        const auto cols = gl::iSquareRoot<Size>();
+        const auto one  = T(1);
+        const auto zero = T(0);
+
+        for (auto &e : matrix)
+            e = zero;
+
+        for (unsigned int i = 0; i < cols; ++i)
+        {
+            const auto pos = i * cols + (i % cols);
+            matrix[pos]    = one;
+        }
+    }
+
   private:
     std::vector<T> mElements;
     unsigned int mRows;