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Use algorithmic and vectorizable BC1 index fixup.

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Bartosz Taudul 2024-08-21 22:23:16 +02:00
parent 5c1cc80897
commit b6eb08befe
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1 changed files with 5 additions and 22 deletions
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27
server/TracyTextureCompression.cpp
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@ -191,35 +191,18 @@ void TextureCompression::Rdo( char* data, size_t blocks )
while( --blocks );
}
static constexpr uint8_t DxtcIndexTable[256] = {
85, 87, 86, 84, 93, 95, 94, 92, 89, 91, 90, 88, 81, 83, 82, 80,
117, 119, 118, 116, 125, 127, 126, 124, 121, 123, 122, 120, 113, 115, 114, 112,
101, 103, 102, 100, 109, 111, 110, 108, 105, 107, 106, 104, 97, 99, 98, 96,
69, 71, 70, 68, 77, 79, 78, 76, 73, 75, 74, 72, 65, 67, 66, 64,
213, 215, 214, 212, 221, 223, 222, 220, 217, 219, 218, 216, 209, 211, 210, 208,
245, 247, 246, 244, 253, 255, 254, 252, 249, 251, 250, 248, 241, 243, 242, 240,
229, 231, 230, 228, 237, 239, 238, 236, 233, 235, 234, 232, 225, 227, 226, 224,
197, 199, 198, 196, 205, 207, 206, 204, 201, 203, 202, 200, 193, 195, 194, 192,
149, 151, 150, 148, 157, 159, 158, 156, 153, 155, 154, 152, 145, 147, 146, 144,
181, 183, 182, 180, 189, 191, 190, 188, 185, 187, 186, 184, 177, 179, 178, 176,
165, 167, 166, 164, 173, 175, 174, 172, 169, 171, 170, 168, 161, 163, 162, 160,
133, 135, 134, 132, 141, 143, 142, 140, 137, 139, 138, 136, 129, 131, 130, 128,
21, 23, 22, 20, 29, 31, 30, 28, 25, 27, 26, 24, 17, 19, 18, 16,
53, 55, 54, 52, 61, 63, 62, 60, 57, 59, 58, 56, 49, 51, 50, 48,
37, 39, 38, 36, 45, 47, 46, 44, 41, 43, 42, 40, 33, 35, 34, 32,
5, 7, 6, 4, 13, 15, 14, 12, 9, 11, 10, 8, 1, 3, 2, 0
};
void TextureCompression::FixOrder( char* data, size_t blocks )
{
assert( blocks > 0 );
do
{
uint32_t res = 0;
uint32_t tmp;
memcpy( &tmp, data+4, 4 );
for( int k=0; k<4; k++ ) res |= DxtcIndexTable[(tmp >> (k*8)) & 0xFF] << (k*8);
memcpy( data+4, &res, 4 );
tmp = ~tmp;
uint32_t t0 = tmp & 0x55555555;
uint32_t t1 = tmp & 0xAAAAAAAA;
tmp = ( ( t0 << 1 ) | ( t1 >> 1 ) ) ^ t1;
memcpy( data+4, &tmp, 4 );
data += 8;
}
while( --blocks );