82 lines
2.5 KiB
C#
82 lines
2.5 KiB
C#
namespace Ryujinx.Graphics.Vulkan
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{
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internal class BufferUsageBitmap
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{
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private readonly BitMap _bitmap;
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private readonly int _size;
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private readonly int _granularity;
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private readonly int _bits;
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private readonly int _writeBitOffset;
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private readonly int _intsPerCb;
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private readonly int _bitsPerCb;
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public BufferUsageBitmap(int size, int granularity)
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{
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_size = size;
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_granularity = granularity;
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// There are two sets of bits - one for read tracking, and the other for write.
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int bits = (size + (granularity - 1)) / granularity;
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_writeBitOffset = bits;
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_bits = bits << 1;
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_intsPerCb = (_bits + (BitMap.IntSize - 1)) / BitMap.IntSize;
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_bitsPerCb = _intsPerCb * BitMap.IntSize;
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_bitmap = new BitMap(_bitsPerCb * CommandBufferPool.MaxCommandBuffers);
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}
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public void Add(int cbIndex, int offset, int size, bool write)
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{
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if (size == 0)
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{
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return;
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}
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// Some usages can be out of bounds (vertex buffer on amd), so bound if necessary.
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if (offset + size > _size)
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{
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size = _size - offset;
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}
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int cbBase = cbIndex * _bitsPerCb + (write ? _writeBitOffset : 0);
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int start = cbBase + offset / _granularity;
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int end = cbBase + (offset + size - 1) / _granularity;
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_bitmap.SetRange(start, end);
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}
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public bool OverlapsWith(int cbIndex, int offset, int size, bool write = false)
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{
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if (size == 0)
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{
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return false;
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}
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int cbBase = cbIndex * _bitsPerCb + (write ? _writeBitOffset : 0);
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int start = cbBase + offset / _granularity;
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int end = cbBase + (offset + size - 1) / _granularity;
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return _bitmap.IsSet(start, end);
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}
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public bool OverlapsWith(int offset, int size, bool write)
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{
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for (int i = 0; i < CommandBufferPool.MaxCommandBuffers; i++)
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{
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if (OverlapsWith(i, offset, size, write))
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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 void Clear(int cbIndex)
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{
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_bitmap.ClearInt(cbIndex * _intsPerCb, (cbIndex + 1) * _intsPerCb - 1);
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}
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}
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}
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