godot/thirdparty/etc2comp/EtcSortedBlockList.h

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
namespace Etc
{
class Block4x4;
class SortedBlockList
{
public:
class Link
{
public:
inline void Init(Block4x4 *a_pblock)
{
m_pblock = a_pblock;
m_plinkNext = nullptr;
}
inline Block4x4 * GetBlock(void)
{
return m_pblock;
}
inline void SetNext(Link *a_plinkNext)
{
m_plinkNext = a_plinkNext;
}
inline Link * GetNext(void)
{
return m_plinkNext;
}
inline Link * Advance(unsigned int a_uiSteps = 1)
{
Link *plink = this;
for (unsigned int uiStep = 0; uiStep < a_uiSteps; uiStep++)
{
if (plink == nullptr)
{
break;
}
plink = plink->m_plinkNext;
}
return plink;
}
private:
Block4x4 *m_pblock;
Link *m_plinkNext;
};
SortedBlockList(unsigned int a_uiImageBlocks, unsigned int a_uiBuckets);
~SortedBlockList(void);
void AddBlock(Block4x4 *a_pblock);
void Sort(void);
inline Link * GetLinkToFirstBlock(void)
{
return m_plinkFirst;
}
inline unsigned int GetNumberOfAddedBlocks(void)
{
return m_uiAddedBlocks;
}
inline unsigned int GetNumberOfSortedBlocks(void)
{
return m_uiSortedBlocks;
}
void Print(void);
private:
void InitBuckets(void);
class Bucket
{
public:
Link *plinkFirst;
Link *plinkLast;
};
unsigned int m_uiImageBlocks;
int m_iBuckets;
unsigned int m_uiAddedBlocks;
unsigned int m_uiSortedBlocks;
Link *m_palinkPool;
Bucket *m_pabucket;
float m_fMaxError;
Link *m_plinkFirst;
Link *m_plinkLast;
};
} // namespace Etc