kc3-lang/angle/src/libANGLE/IndexRangeCache.cpp

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• Hash : 8dc27f99
  Author :
  Date : 2018-11-29T11:45:44
  

  Use packed enum for DrawElementsType.
  
  The packing and unpacking take a few extra instructions. But it
  completely obviates the need for any switches in the validation code.
  Speed is slightly faster or the similar depending on the back-end.
  
  Also add gl_angle_ext.xml to GL entry point generator inputs. This was
  missing and would cause the code generation to miss certain changes.
  
  Bug: angleproject:2985
  Change-Id: I1ea41a71db71135000166ead8305ec42d22ff7b3
  Reviewed-on: https://chromium-review.googlesource.com/c/1351729
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/libANGLE/IndexRangeCache.cpp

• //
  // 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 gl::IndexRangeCache class which stores information about
  // ranges of indices.
  
  #include "libANGLE/IndexRangeCache.h"
  
  #include "common/debug.h"
  #include "libANGLE/formatutils.h"
  
  namespace gl
  {
  
  IndexRangeCache::IndexRangeCache() {}
  
  IndexRangeCache::~IndexRangeCache() {}
  
  void IndexRangeCache::addRange(DrawElementsType type,
                                 size_t offset,
                                 size_t count,
                                 bool primitiveRestartEnabled,
                                 const IndexRange &range)
  {
      mIndexRangeCache[IndexRangeKey(type, offset, count, primitiveRestartEnabled)] = range;
  }
  
  bool IndexRangeCache::findRange(DrawElementsType type,
                                  size_t offset,
                                  size_t count,
                                  bool primitiveRestartEnabled,
                                  IndexRange *outRange) const
  {
      auto i = mIndexRangeCache.find(IndexRangeKey(type, offset, count, primitiveRestartEnabled));
      if (i != mIndexRangeCache.end())
      {
          if (outRange)
          {
              *outRange = i->second;
          }
          return true;
      }
      else
      {
          if (outRange)
          {
              *outRange = IndexRange();
          }
          return false;
      }
  }
  
  void IndexRangeCache::invalidateRange(size_t offset, size_t size)
  {
      size_t invalidateStart = offset;
      size_t invalidateEnd   = offset + size;
  
      auto i = mIndexRangeCache.begin();
      while (i != mIndexRangeCache.end())
      {
          size_t rangeStart = i->first.offset;
          size_t rangeEnd =
              i->first.offset + (GetDrawElementsTypeSize(i->first.type) * i->first.count);
  
          if (invalidateEnd < rangeStart || invalidateStart > rangeEnd)
          {
              ++i;
          }
          else
          {
              mIndexRangeCache.erase(i++);
          }
      }
  }
  
  void IndexRangeCache::clear()
  {
      mIndexRangeCache.clear();
  }
  
  IndexRangeCache::IndexRangeKey::IndexRangeKey()
      : IndexRangeCache::IndexRangeKey(DrawElementsType::InvalidEnum, 0, 0, false)
  {}
  
  IndexRangeCache::IndexRangeKey::IndexRangeKey(DrawElementsType type_,
                                                size_t offset_,
                                                size_t count_,
                                                bool primitiveRestartEnabled_)
      : type(type_), offset(offset_), count(count_), primitiveRestartEnabled(primitiveRestartEnabled_)
  {}
  
  bool IndexRangeCache::IndexRangeKey::operator<(const IndexRangeKey &rhs) const
  {
      if (type != rhs.type)
      {
          return type < rhs.type;
      }
      if (offset != rhs.offset)
      {
          return offset < rhs.offset;
      }
      if (count != rhs.count)
      {
          return count < rhs.count;
      }
      if (primitiveRestartEnabled != rhs.primitiveRestartEnabled)
      {
          return primitiveRestartEnabled;
      }
      return false;
  }
  
  }  // namespace gl
  

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