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Improve memory access patterns in RDO compression.
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parent
2723144678
commit
2608ceca05
@ -77,17 +77,18 @@ void TextureCompression::Rdo( char* data, size_t blocks )
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assert( blocks > 0 );
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do
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{
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uint32_t idx;
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memcpy( &idx, data+4, 4 );
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uint64_t blk;
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memcpy( &blk, data, 8 );
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uint32_t idx = blk >> 32;
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if( idx == 0x55555555 )
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{
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data += 8;
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continue;
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}
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uint16_t c0, c1;
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memcpy( &c0, data, 2 );
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memcpy( &c1, data+2, 2 );
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uint16_t c0 = blk & 0xFFFF;
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uint16_t c1 = ( blk >> 16 ) & 0xFFFF;
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const int r0b = c0 & 0xF800;
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const int g0b = c0 & 0x07E0;
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@ -180,12 +181,9 @@ void TextureCompression::Rdo( char* data, size_t blocks )
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if( maxDelta23 <= tr3 )
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{
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memcpy( data, &c1, 2 );
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memcpy( data+2, &c0, 2 );
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uint8_t tmp[4];
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memcpy( tmp, &idx, 4 );
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for( int k=0; k<4; k++ ) tmp[k] = Dxtc4To3Table[tmp[k]];
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memcpy( data+4, tmp, 4 );
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uint64_t c = c1 | ( uint64_t( c0 ) << 16 );
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for( int k=0; k<4; k++ ) c |= uint64_t( Dxtc4To3Table[(idx >> (k*8)) & 0xFF] ) << ( 32 + k*8 );
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memcpy( data, &c, 8 );
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}
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}
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}
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