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//
// 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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