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https://github.com/ryujinx-mirror/ryujinx.git
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4da44e09cb
* Make all structs readonly when applicable. It should reduce amount of needless defensive copies * Make structs with trivial boilerplate equality code record structs * Remove unnecessary readonly modifiers from TextureCreateInfo * Make BitMap structs readonly too
157 lines
No EOL
3.6 KiB
C#
157 lines
No EOL
3.6 KiB
C#
namespace Ryujinx.Graphics.Vulkan
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{
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readonly struct BitMap
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{
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public const int IntSize = 64;
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private const int IntShift = 6;
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private const int IntMask = IntSize - 1;
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private readonly long[] _masks;
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public BitMap(int count)
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{
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_masks = new long[(count + IntMask) / IntSize];
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}
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public bool AnySet()
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{
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for (int i = 0; i < _masks.Length; i++)
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{
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if (_masks[i] != 0)
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{
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return true;
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}
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}
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return false;
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}
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public bool IsSet(int bit)
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{
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int wordIndex = bit >> IntShift;
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int wordBit = bit & IntMask;
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long wordMask = 1L << wordBit;
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return (_masks[wordIndex] & wordMask) != 0;
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}
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public bool IsSet(int start, int end)
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{
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if (start == end)
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{
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return IsSet(start);
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}
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int startIndex = start >> IntShift;
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int startBit = start & IntMask;
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long startMask = -1L << startBit;
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int endIndex = end >> IntShift;
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int endBit = end & IntMask;
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long endMask = (long)(ulong.MaxValue >> (IntMask - endBit));
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if (startIndex == endIndex)
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{
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return (_masks[startIndex] & startMask & endMask) != 0;
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}
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if ((_masks[startIndex] & startMask) != 0)
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{
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return true;
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}
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for (int i = startIndex + 1; i < endIndex; i++)
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{
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if (_masks[i] != 0)
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{
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return true;
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}
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}
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if ((_masks[endIndex] & endMask) != 0)
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{
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return true;
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}
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return false;
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}
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public bool Set(int bit)
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{
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int wordIndex = bit >> IntShift;
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int wordBit = bit & IntMask;
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long wordMask = 1L << wordBit;
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if ((_masks[wordIndex] & wordMask) != 0)
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{
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return false;
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}
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_masks[wordIndex] |= wordMask;
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return true;
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}
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public void SetRange(int start, int end)
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{
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if (start == end)
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{
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Set(start);
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return;
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}
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int startIndex = start >> IntShift;
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int startBit = start & IntMask;
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long startMask = -1L << startBit;
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int endIndex = end >> IntShift;
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int endBit = end & IntMask;
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long endMask = (long)(ulong.MaxValue >> (IntMask - endBit));
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if (startIndex == endIndex)
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{
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_masks[startIndex] |= startMask & endMask;
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}
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else
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{
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_masks[startIndex] |= startMask;
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for (int i = startIndex + 1; i < endIndex; i++)
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{
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_masks[i] |= -1;
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}
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_masks[endIndex] |= endMask;
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}
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}
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public void Clear(int bit)
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{
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int wordIndex = bit >> IntShift;
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int wordBit = bit & IntMask;
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long wordMask = 1L << wordBit;
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_masks[wordIndex] &= ~wordMask;
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}
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public void Clear()
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{
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for (int i = 0; i < _masks.Length; i++)
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{
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_masks[i] = 0;
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}
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}
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public void ClearInt(int start, int end)
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{
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for (int i = start; i <= end; i++)
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{
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_masks[i] = 0;
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}
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}
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}
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} |