AssetRipper/AssetRipper.TextureDecoder
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Use stackalloc in Bc6h

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Jeremy Pritts committed 2023-06-29 22:21:45 -04:00
1 parent 691796b919
commit 862995196f
1 file changed
+21 -23
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AssetRipper.TextureDecoder/Bc/BcHelpers.cs
+21 -23
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@@ -64,13 +64,10 @@ internal unsafe static class BcHelpers
public static void DecompressBc6h_Half(ReadOnlySpan<byte> compressedBlock, Span<ushort> decompressedBlock, int destinationPitch, bool isSigned)
{
BitStream bstream = new BitStream();
int[] r = new int[4]; // wxyz
int[] g = new int[4];
int[] b = new int[4];
int[] epR = new int[2]; // endpoints A and B
int[] epG = new int[2];
int[] epB = new int[2];
BitStream bstream = new();
Span<int> r = stackalloc int[4]; // wxyz
Span<int> g = stackalloc int[4];
Span<int> b = stackalloc int[4];
int decompressedOffset = 0;
@@ -78,9 +75,9 @@ internal unsafe static class BcHelpers
bstream.low = compressedBlockSpan[0];
bstream.high = compressedBlockSpan[1];
r[0] = r[1] = r[2] = r[3] = 0;
g[0] = g[1] = g[2] = g[3] = 0;
b[0] = b[1] = b[2] = b[3] = 0;
r.Clear();
g.Clear();
b.Clear();
int mode = bstream.ReadBits(2);
if (mode > 1)
@@ -536,7 +533,7 @@ internal unsafe static class BcHelpers
g[i] = TransformInverse(g[i], g[0], Bc6hTables.ActualBitsCount[0][mode], isSigned);
b[i] = TransformInverse(b[i], b[0], Bc6hTables.ActualBitsCount[0][mode], isSigned);
}
}
}
for (int i = 0; i < 4; ++i)
{
@@ -553,18 +550,19 @@ internal unsafe static class BcHelpers
}
partitionSet &= 0x01;
int index = bstream.ReadBits(indexBits);
int index = bstream.ReadBits(indexBits);
// endpoints A and B
int epR0 = Unquantize(r[(partitionSet * 2) + 0], Bc6hTables.ActualBitsCount[0][mode], isSigned);
int epG0 = Unquantize(g[(partitionSet * 2) + 0], Bc6hTables.ActualBitsCount[0][mode], isSigned);
int epB0 = Unquantize(b[(partitionSet * 2) + 0], Bc6hTables.ActualBitsCount[0][mode], isSigned);
int epR1 = Unquantize(r[(partitionSet * 2) + 1], Bc6hTables.ActualBitsCount[0][mode], isSigned);
int epG1 = Unquantize(g[(partitionSet * 2) + 1], Bc6hTables.ActualBitsCount[0][mode], isSigned);
int epB1 = Unquantize(b[(partitionSet * 2) + 1], Bc6hTables.ActualBitsCount[0][mode], isSigned);
epR[0] = Unquantize(r[(partitionSet * 2) + 0], Bc6hTables.ActualBitsCount[0][mode], isSigned);
epG[0] = Unquantize(g[(partitionSet * 2) + 0], Bc6hTables.ActualBitsCount[0][mode], isSigned);
epB[0] = Unquantize(b[(partitionSet * 2) + 0], Bc6hTables.ActualBitsCount[0][mode], isSigned);
epR[1] = Unquantize(r[(partitionSet * 2) + 1], Bc6hTables.ActualBitsCount[0][mode], isSigned);
epG[1] = Unquantize(g[(partitionSet * 2) + 1], Bc6hTables.ActualBitsCount[0][mode], isSigned);
epB[1] = Unquantize(b[(partitionSet * 2) + 1], Bc6hTables.ActualBitsCount[0][mode], isSigned);
decompressedBlock[decompressedOffset + (j * 3) + 0] = FinishUnquantize(Interpolate(epR[0], epR[1], (mode >= 10) ? Bc6hTables.AWeight4 : Bc6hTables.AWeight3, index), isSigned);
decompressedBlock[decompressedOffset + (j * 3) + 1] = FinishUnquantize(Interpolate(epG[0], epG[1], (mode >= 10) ? Bc6hTables.AWeight4 : Bc6hTables.AWeight3, index), isSigned);
decompressedBlock[decompressedOffset + (j * 3) + 2] = FinishUnquantize(Interpolate(epB[0], epB[1], (mode >= 10) ? Bc6hTables.AWeight4 : Bc6hTables.AWeight3, index), isSigned);
decompressedBlock[decompressedOffset + (j * 3) + 0] = FinishUnquantize(Interpolate(epR0, epR1, (mode >= 10) ? Bc6hTables.AWeight4 : Bc6hTables.AWeight3, index), isSigned);
decompressedBlock[decompressedOffset + (j * 3) + 1] = FinishUnquantize(Interpolate(epG0, epG1, (mode >= 10) ? Bc6hTables.AWeight4 : Bc6hTables.AWeight3, index), isSigned);
decompressedBlock[decompressedOffset + (j * 3) + 2] = FinishUnquantize(Interpolate(epB0, epB1, (mode >= 10) ? Bc6hTables.AWeight4 : Bc6hTables.AWeight3, index), isSigned);
}
decompressedOffset += destinationPitch;
@@ -573,7 +571,7 @@ internal unsafe static class BcHelpers
public static void DecompressBc7(ReadOnlySpan<byte> compressedBlock, Span<byte> decompressedBlock, int destinationPitch)
{
BitStream bstream = new BitStream();
BitStream bstream = new();
int[][] endpoints = CreateRectangularArray<int>(6, 4);
int[][] indices = CreateRectangularArray<int>(4, 4);