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

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• Hash : c2679dbc
  Author :
  Date : 2025-03-10T12:15:08
  

  Key vertex array index range cache on restart
  
  Key vertex array index range cache on primitive restart enablement.
  Add the test to WebGLCompatibilityTest as otherwise the
  VertexArray::getIndexRange() is not testable. Currently WebGL
  compatibility contexts allow changing primitive restart.
  
  Bug: angleproject:401284933
  Change-Id: I48a53770d7dcb2276b89fd743f4834c53c8d8d1e
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6333538
  Auto-Submit: Kimmo Kinnunen <kkinnunen@apple.com>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Kenneth Russell <kbr@chromium.org>
  

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• src/libANGLE/IndexRangeCache.cpp

• //
  // 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.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();
  }
  
  bool 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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