IndexRangeCache.cpp

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Author : Stuart Morgan
Date : 2019-08-14 12:25:12
Hash : 9d737966
Message : Standardize copyright notices to project style For all "ANGLE Project" copyrights, standardize to the format specified by the style guide. Changes: - "Copyright (c)" and "Copyright(c)" changed to just "Copyright". - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1"). - Fixed a small number of files that had no copyright date using the initial commit year from the version control history. - Fixed one instance of copyright being "The ANGLE Project" rather than "The ANGLE Project Authors" These changes are applied both to the copyright of source file, and where applicable to copyright statements that are generated by templates. BUG=angleproject:3811 Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

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();
}

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

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

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