1 files changed, 63 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/libANGLE/IndexRangeCache.h b/gfx/angle/checkout/src/libANGLE/IndexRangeCache.h
new file mode 100644
index 0000000000..0a0c22fe04
--- /dev/null
+++ b/gfx/angle/checkout/src/libANGLE/IndexRangeCache.h
@@ -0,0 +1,63 @@
+//
+// Copyright 2013 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// IndexRangeCache.h: Defines the gl::IndexRangeCache class which stores information about
+// ranges of indices.
+
+#ifndef LIBANGLE_INDEXRANGECACHE_H_
+#define LIBANGLE_INDEXRANGECACHE_H_
+
+#include "angle_gl.h"
+#include "common/PackedEnums.h"
+#include "common/angleutils.h"
+#include "common/mathutil.h"
+
+#include <map>
+
+namespace gl
+{
+
+class IndexRangeCache
+{
+  public:
+    IndexRangeCache();
+    ~IndexRangeCache();
+
+    void addRange(DrawElementsType type,
+                  size_t offset,
+                  size_t count,
+                  bool primitiveRestartEnabled,
+                  const IndexRange &range);
+    bool findRange(DrawElementsType type,
+                   size_t offset,
+                   size_t count,
+                   bool primitiveRestartEnabled,
+                   IndexRange *outRange) const;
+
+    void invalidateRange(size_t offset, size_t size);
+    void clear();
+
+  private:
+    struct IndexRangeKey
+    {
+        IndexRangeKey();
+        IndexRangeKey(DrawElementsType type, size_t offset, size_t count, bool primitiveRestart);
+
+        bool operator<(const IndexRangeKey &rhs) const;
+
+        DrawElementsType type;
+        size_t offset;
+        size_t count;
+        bool primitiveRestartEnabled;
+    };
+
+    typedef std::map<IndexRangeKey, IndexRange> IndexRangeMap;
+    IndexRangeMap mIndexRangeCache;
+};
+
+}  // namespace gl
+
+#endif  // LIBANGLE_INDEXRANGECACHE_H_