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libSquish
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This commit is contained in:
Jack Andersen 2015-07-18 23:14:23 -10:00
parent 5fa294a640
commit 21d3742aa5
2 changed files with 5 additions and 3 deletions
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6
colourblockGCN.cpp
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@ -61,7 +61,7 @@ static void WriteColourBlock( int a, int b, u8* indices, void* block )
// get the block as bytes
u8* bytes = ( u8* )block;
// write the endpoints
// write the endpoints - GCN 16-bit words byte-swapped
bytes[1] = ( u8 )( a & 0xff );
bytes[0] = ( u8 )( a >> 8 );
bytes[3] = ( u8 )( b & 0xff );
@ -71,6 +71,7 @@ static void WriteColourBlock( int a, int b, u8* indices, void* block )
for( int i = 0; i < 4; ++i )
{
u8 const* ind = indices + 4*i;
// GCN: indices reversed
bytes[4 + i] = ind[3] | ( ind[2] << 2 ) | ( ind[1] << 4 ) | ( ind[0] << 6 );
}
}
@ -142,7 +143,7 @@ void WriteColourBlock4GCN( Vec3::Arg start, Vec3::Arg end, u8 const* indices, vo
static int Unpack565( u8 const* packed, u8* colour )
{
// build the packed value
// build the packed value - GCN: indices reversed
int value = ( int )packed[1] | ( ( int )packed[0] << 8 );
// get the components in the stored range
@ -199,6 +200,7 @@ void DecompressColourGCN( u8* rgba, void const* block )
u8* ind = indices + 4*i;
u8 packed = bytes[4 + i];
// GCN: indices reversed
ind[3] = packed & 0x3;
ind[2] = ( packed >> 2 ) & 0x3;
ind[1] = ( packed >> 4 ) & 0x3;

2
colourblockGCN.h
View File

@ -38,4 +38,4 @@ void DecompressColourGCN( u8* rgba, void const* block );
} // namespace squish
#endif // ndef SQUISH_COLOURBLOCK_H
#endif // ndef SQUISH_COLOURBLOCKGCN_H