Merge remote-tracking branch 'origin/master' into feature/custom-vector-source

1 files changed, 35 insertions, 0 deletions

diff --git a/src/mbgl/gl/normalization.hpp b/src/mbgl/gl/normalization.hpp
new file mode 100644
index 0000000000..83fa67a3ec
--- /dev/null
+++ b/src/mbgl/gl/normalization.hpp
@@ -0,0 +1,35 @@
+#pragma once
+
+#include <mbgl/math/clamp.hpp>
+
+#include <cassert>
+#include <limits>
+
+namespace mbgl {
+namespace gl {
+
+template <class T>
+class Normalized {
+public:
+    T value;
+
+    Normalized() : value(0) {}
+
+    explicit Normalized(float f)
+        : value(static_cast<T>(std::numeric_limits<T>::max() * util::clamp(f, 0.0f, 1.0f))) {
+        assert(f >= 0.0f);
+        assert(f <= 1.0f);
+    }
+
+    float denormalized() const {
+        return float(value) / std::numeric_limits<T>::max();
+    }
+};
+
+template <class T>
+bool operator==(const Normalized<T>& lhs, const Normalized<T>& rhs) {
+    return lhs.value == rhs.value;
+}
+
+} // namespace gl
+} // namespace mbgl