1 files changed, 66 insertions, 0 deletions
diff --git a/src/mbgl/gl/stencil_mode.hpp b/src/mbgl/gl/stencil_mode.hpp
new file mode 100644
index 0000000000..bc959c9a73
--- /dev/null
+++ b/src/mbgl/gl/stencil_mode.hpp
@@ -0,0 +1,66 @@
+#pragma once
+
+#include <mbgl/util/variant.hpp>
+
+namespace mbgl {
+namespace gl {
+
+class StencilMode {
+public:
+    template <uint32_t F>
+    struct SimpleTest {
+        static constexpr uint32_t func = F;
+        static constexpr uint32_t mask = 0;
+    };
+
+    template <uint32_t F>
+    struct MaskedTest {
+        static constexpr uint32_t func = F;
+        uint32_t mask;
+    };
+
+    using Never        = SimpleTest<0x0200>;
+    using Less         = MaskedTest<0x0201>;
+    using Equal        = MaskedTest<0x0202>;
+    using LessEqual    = MaskedTest<0x0203>;
+    using Greater      = MaskedTest<0x0204>;
+    using NotEqual     = MaskedTest<0x0205>;
+    using GreaterEqual = MaskedTest<0x0206>;
+    using Always       = SimpleTest<0x0207>;
+
+    using Test = variant<
+        Never,
+        Less,
+        Equal,
+        LessEqual,
+        Greater,
+        NotEqual,
+        GreaterEqual,
+        Always>;
+
+    enum Op {
+        Zero          = 0x0000,
+        Keep          = 0x1E00,
+        Replace       = 0x1E01,
+        Increment     = 0x1E02,
+        Decrement     = 0x1E03,
+        Invert        = 0x150A,
+        IncrementWrap = 0x8507,
+        DecrementWrap = 0x8508
+    };
+
+    Test test;
+    int32_t ref;
+    uint32_t mask;
+
+    Op fail;
+    Op depthFail;
+    Op pass;
+
+    static StencilMode disabled() {
+       return StencilMode { Always(), 0, 0, Keep, Keep, Keep };
+    }
+};
+
+} // namespace gl
+} // namespace mbgl