AssetRipper/AssetRipper.TextureDecoder
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Astc span output

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Jeremy Pritts committed 2023-09-17 00:42:01 -04:00
1 parent 2a41577d28
commit 1ef781f072
1 file changed
+10 -14
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AssetRipper.TextureDecoder/Astc/AstcDecoder.cs
+10 -14
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@@ -18,15 +18,7 @@ namespace AssetRipper.TextureDecoder.Astc
return DecodeASTC(input, width, height, blockWidth, blockHeight, output);
}
public unsafe static int DecodeASTC(ReadOnlySpan<byte> input, int width, int height, int blockWidth, int blockHeight, Span<byte> output)
{
fixed (byte* outputPtr = output)
{
return DecodeASTC(input, width, height, blockWidth, blockHeight, outputPtr);
}
}
private unsafe static int DecodeASTC(ReadOnlySpan<byte> input, int width, int height, int blockWidth, int blockHeight, byte* output)
public static int DecodeASTC(ReadOnlySpan<byte> input, int width, int height, int blockWidth, int blockHeight, Span<byte> output)
{
ValidateBlockDimension(blockWidth);
ValidateBlockDimension(blockHeight);
@@ -41,19 +33,23 @@ namespace AssetRipper.TextureDecoder.Astc
{
DecodeBlock(input[inputOffset..], blockWidth, blockHeight, buf);
int clen = s < bcw - 1 ? blockWidth : clen_last;
uint* outputPtr = (uint*)(output + (t * blockHeight * 4 * width + s * 4 * blockWidth));
for (int i = 0, y = t * blockHeight; i < blockHeight && y < height; i++, y++)
{
int outputOffsetUInt32 = t * blockHeight * width + s * blockWidth + i * width;
for (int j = 0; j < clen; j++)
{
outputPtr[j] = buf[j + i * blockWidth];
WriteUInt32(output, outputOffsetUInt32 + j, buf[j + i * blockWidth]);
}
outputPtr += width;
}
}
}
return inputOffset;
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
static void WriteUInt32(Span<byte> buffer, int offsetUInt32, uint value)
{
BinaryPrimitives.WriteUInt32LittleEndian(buffer.Slice(offsetUInt32 * sizeof(uint)), value);
}
}
private unsafe static void DecodeBlock(ReadOnlySpan<byte> input, int blockWidth, int blockHeight, Span<uint> output)
@@ -775,7 +771,7 @@ namespace AssetRipper.TextureDecoder.Astc
}
}
private unsafe static void DecodeIntseq(ReadOnlySpan<byte> input, int offset, int a, int b, int count, bool reverse, Span<IntSeqData> _out)
private static void DecodeIntseq(ReadOnlySpan<byte> input, int offset, int a, int b, int count, bool reverse, Span<IntSeqData> _out)
{
if (count <= 0)
{