IndexRangeCache.h - mozsearch

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//

// 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_