kc3-lang/angle/src/libGLESv2/renderer/IndexRangeCache.cpp

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• Author : Geoff Lang
  Date : 2013-08-06 10:43:14
  Hash : b23fc091
  Message : Change the offset variable to an unsigned int since it cannot be negative and is assigned to streamOffset which is an unsigned int. TRAC #23671 Signed-off-by: Nicolas Capens Signed-off-by: Shannon Woods Author: Geoff Lang

• src/libGLESv2/renderer/IndexRangeCache.cpp

• #include "precompiled.h"
  //
  // Copyright (c) 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.cpp: Defines the rx::IndexRangeCache class which stores information about
  // ranges of indices.
  
  #include "libGLESv2/renderer/IndexRangeCache.h"
  #include "libGLESv2/formatutils.h"
  #include "common/debug.h"
  #include <tuple>
  
  namespace rx
  {
  
  void IndexRangeCache::addRange(GLenum type, unsigned int offset, GLsizei count, unsigned int minIdx, unsigned int maxIdx,
                                 unsigned int streamOffset)
  {
      mIndexRangeCache[IndexRange(type, offset, count)] = IndexBounds(minIdx, maxIdx, streamOffset);
  }
  
  void IndexRangeCache::invalidateRange(unsigned int offset, unsigned int size)
  {
      unsigned int invalidateStart = offset;
      unsigned int invalidateEnd = offset + size;
  
      IndexRangeMap::iterator i = mIndexRangeCache.begin();
      while (i != mIndexRangeCache.end())
      {
          unsigned int rangeStart = i->second.streamOffset;
          unsigned int rangeEnd = i->second.streamOffset + (gl::GetTypeBytes(i->first.type) * i->first.count);
  
          if (invalidateEnd < rangeStart || invalidateStart > rangeEnd)
          {
              ++i;
          }
          else
          {
              i = mIndexRangeCache.erase(i);
          }
      }
  }
  
  bool IndexRangeCache::findRange(GLenum type, unsigned int offset, GLsizei count, unsigned int *outMinIndex,
                                  unsigned int *outMaxIndex, unsigned int *outStreamOffset) const
  {
      IndexRangeMap::const_iterator i = mIndexRangeCache.find(IndexRange(type, offset, count));
      if (i != mIndexRangeCache.end())
      {
          if (outMinIndex)     *outMinIndex = i->second.minIndex;
          if (outMaxIndex)     *outMaxIndex = i->second.maxIndex;
          if (outStreamOffset) *outStreamOffset = i->second.streamOffset;
          return true;
      }
      else
      {
          if (outMinIndex)     *outMinIndex = 0;
          if (outMaxIndex)     *outMaxIndex = 0;
          if (outStreamOffset) *outStreamOffset = 0;
          return false;
      }
  }
  
  void IndexRangeCache::clear()
  {
      mIndexRangeCache.clear();
  }
  
  IndexRangeCache::IndexRange::IndexRange()
      : type(GL_NONE), offset(0), count(0)
  {
  }
  
  IndexRangeCache::IndexRange::IndexRange(GLenum typ, intptr_t off, GLsizei c)
      : type(typ), offset(off), count(c)
  {
  }
  
  bool IndexRangeCache::IndexRange::operator<(const IndexRange& rhs) const
  {
      return std::make_tuple(type, offset, count) < std::make_tuple(rhs.type, rhs.offset, rhs.count);
  }
  
  IndexRangeCache::IndexBounds::IndexBounds()
      : minIndex(0), maxIndex(0), streamOffset(0)
  {
  }
  
  IndexRangeCache::IndexBounds::IndexBounds(unsigned int minIdx, unsigned int maxIdx, unsigned int offset)
      : minIndex(minIdx), maxIndex(maxIdx), streamOffset(offset)
  {
  }
  
  }