Justin Marshall
42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
#pragma once
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#include <cstdint>
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class idBitBlockAllocator {
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public:
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idBitBlockAllocator(int blocksWide, int blocksHigh);
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~idBitBlockAllocator();
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idBitBlockAllocator(const idBitBlockAllocator&) = delete;
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idBitBlockAllocator& operator=(const idBitBlockAllocator&) = delete;
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void Clear();
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void FillBlock(int x, int y, int w, int h);
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void FillBitBlock(int x, int y, const idBitBlockAllocator& block);
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bool TestBlock(int x, int y, int w, int h, int* fail = nullptr) const;
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bool TestBitBlock(int x, int y, const idBitBlockAllocator& block) const;
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bool FindBlockLinear(int& x, int& y, int w, int h);
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bool FindBitBlockLinear(int& x, int& y, const idBitBlockAllocator& block);
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bool FindBlockInterleaved(int& x, int& y, int w, int h,
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int& searchPoint, bool naturallyAlign);
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int Width() const { return width; }
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int Height() const { return height; }
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bool Get(int x, int y) const;
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private:
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int width;
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int height;
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unsigned char* bits;
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void Set(int x, int y);
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};
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void SeparateBits(int bits, int& x, int& y);
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void SeparateBits2(int bits, int& x, int& y);
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#if INTPTR_MAX == INT32_MAX
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static_assert(sizeof(idBitBlockAllocator) == 12,
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"Recovered idBitBlockAllocator ABI changed");
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#endif
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