michael@0: //
michael@0: // Copyright (c) 2013 The ANGLE Project Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: //
michael@0: 
michael@0: // IndexRangeCache.h: Defines the rx::IndexRangeCache class which stores information about
michael@0: // ranges of indices.
michael@0: 
michael@0: #ifndef LIBGLESV2_RENDERER_INDEXRANGECACHE_H_
michael@0: #define LIBGLESV2_RENDERER_INDEXRANGECACHE_H_
michael@0: 
michael@0: #include "common/angleutils.h"
michael@0: 
michael@0: namespace rx
michael@0: {
michael@0: 
michael@0: class IndexRangeCache
michael@0: {
michael@0:   public:
michael@0:     void addRange(GLenum type, intptr_t offset, GLsizei count, unsigned int minIdx, unsigned int maxIdx, 
michael@0:                   unsigned int streamOffset);
michael@0:     bool findRange(GLenum type, intptr_t offset, GLsizei count, unsigned int *outMinIndex,
michael@0:                    unsigned int *outMaxIndex, unsigned int *outStreamOffset) const;
michael@0: 
michael@0:     void invalidateRange(unsigned int offset, unsigned int size);
michael@0:     void clear();
michael@0: 
michael@0:   private:
michael@0:     struct IndexRange
michael@0:     {
michael@0:         GLenum type;
michael@0:         intptr_t offset;
michael@0:         GLsizei count;
michael@0: 
michael@0:         IndexRange();
michael@0:         IndexRange(GLenum type, intptr_t offset, GLsizei count);
michael@0: 
michael@0:         bool operator<(const IndexRange& rhs) const;
michael@0:     };
michael@0: 
michael@0:     struct IndexBounds
michael@0:     {
michael@0:         unsigned int minIndex;
michael@0:         unsigned int maxIndex;
michael@0:         unsigned int streamOffset;
michael@0: 
michael@0:         IndexBounds();
michael@0:         IndexBounds(unsigned int minIdx, unsigned int maxIdx, unsigned int offset);
michael@0:     };
michael@0: 
michael@0:     typedef std::map<IndexRange, IndexBounds> IndexRangeMap;
michael@0:     IndexRangeMap mIndexRangeCache;
michael@0: };
michael@0: 
michael@0: }
michael@0: 
michael@0: #endif LIBGLESV2_RENDERER_INDEXRANGECACHE_H