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https://github.com/Ryujinx/Ryujinx.git
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55 lines
1.2 KiB
C#
55 lines
1.2 KiB
C#
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namespace Ryujinx.Graphics.Texture.Utils
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{
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struct Block
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{
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public ulong Low;
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public ulong High;
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public void Encode(ulong value, ref int offset, int bits)
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{
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if (offset >= 64)
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{
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High |= value << (offset - 64);
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}
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else
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{
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Low |= value << offset;
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if (offset + bits > 64)
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{
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int remainder = 64 - offset;
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High |= value >> remainder;
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}
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}
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offset += bits;
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}
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public ulong Decode(ref int offset, int bits)
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{
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ulong value;
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ulong mask = bits == 64 ? ulong.MaxValue : (1UL << bits) - 1;
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if (offset >= 64)
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{
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value = (High >> (offset - 64)) & mask;
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}
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else
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{
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value = Low >> offset;
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if (offset + bits > 64)
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{
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int remainder = 64 - offset;
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value |= High << remainder;
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}
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value &= mask;
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}
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offset += bits;
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return value;
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}
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}
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}
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