diff options
| author | Ac_K <Acoustik666@gmail.com> | 2018-06-01 18:00:16 +0000 |
|---|---|---|
| committer | gdkchan <gab.dark.100@gmail.com> | 2018-06-01 15:00:16 -0300 |
| commit | aeb1bbf50c9996ab53a17e354798be3137ba2ae2 (patch) | |
| tree | b2a3ed103db82e4a51baf70343a839b97762770f /Ryujinx.Graphics/Gal/Texture/BitArrayStream.cs | |
| parent | f43dd080641b3c2508e35bc7651fb0adcb282a2e (diff) | |
Add an ASTC Decoder (Not currently used in Ryujinx) (#131)
* Add an ASTC Decoder (Not currently used in Ryujinx)
* Update ASTCDecoder.cs
Diffstat (limited to 'Ryujinx.Graphics/Gal/Texture/BitArrayStream.cs')
| -rw-r--r-- | Ryujinx.Graphics/Gal/Texture/BitArrayStream.cs | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/Ryujinx.Graphics/Gal/Texture/BitArrayStream.cs b/Ryujinx.Graphics/Gal/Texture/BitArrayStream.cs new file mode 100644 index 00000000..eb2204c4 --- /dev/null +++ b/Ryujinx.Graphics/Gal/Texture/BitArrayStream.cs @@ -0,0 +1,120 @@ +using System;
+using System.Collections;
+
+namespace Ryujinx.Graphics.Gal.Texture
+{
+ public class BitArrayStream
+ {
+ public BitArray BitsArray;
+ public int Position { get; private set; }
+
+ public BitArrayStream(BitArray BitArray)
+ {
+ BitsArray = BitArray;
+ Position = 0;
+ }
+
+ public short ReadBits(int Length)
+ {
+ int RetValue = 0;
+ for (int i = Position; i < Position + Length; i++)
+ {
+ if (BitsArray[i])
+ {
+ RetValue |= 1 << (i - Position);
+ }
+ }
+
+ Position += Length;
+ return (short)RetValue;
+ }
+
+ public int ReadBits(int Start, int End)
+ {
+ int RetValue = 0;
+ for (int i = Start; i <= End; i++)
+ {
+ if (BitsArray[i])
+ {
+ RetValue |= 1 << (i - Start);
+ }
+ }
+
+ return RetValue;
+ }
+
+ public int ReadBit(int Index)
+ {
+ return Convert.ToInt32(BitsArray[Index]);
+ }
+
+ public void WriteBits(int Value, int Length)
+ {
+ for (int i = Position; i < Position + Length; i++)
+ {
+ BitsArray[i] = ((Value >> (i - Position)) & 1) != 0;
+ }
+
+ Position += Length;
+ }
+
+ public byte[] ToByteArray()
+ {
+ byte[] RetArray = new byte[(BitsArray.Length + 7) / 8];
+ BitsArray.CopyTo(RetArray, 0);
+ return RetArray;
+ }
+
+ public static int Replicate(int Value, int NumberBits, int ToBit)
+ {
+ if (NumberBits == 0) return 0;
+ if (ToBit == 0) return 0;
+
+ int TempValue = Value & ((1 << NumberBits) - 1);
+ int RetValue = TempValue;
+ int ResLength = NumberBits;
+
+ while (ResLength < ToBit)
+ {
+ int Comp = 0;
+ if (NumberBits > ToBit - ResLength)
+ {
+ int NewShift = ToBit - ResLength;
+ Comp = NumberBits - NewShift;
+ NumberBits = NewShift;
+ }
+ RetValue <<= NumberBits;
+ RetValue |= TempValue >> Comp;
+ ResLength += NumberBits;
+ }
+ return RetValue;
+ }
+
+ public static int PopCnt(int Number)
+ {
+ int Counter;
+ for (Counter = 0; Number != 0; Counter++)
+ {
+ Number &= Number - 1;
+ }
+ return Counter;
+ }
+
+ public static void Swap<T>(ref T lhs, ref T rhs)
+ {
+ T Temp = lhs;
+ lhs = rhs;
+ rhs = Temp;
+ }
+
+ // Transfers a bit as described in C.2.14
+ public static void BitTransferSigned(ref int a, ref int b)
+ {
+ b >>= 1;
+ b |= a & 0x80;
+ a >>= 1;
+ a &= 0x3F;
+ if ((a & 0x20) != 0) a -= 0x40;
+ }
+ }
+}
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