Compression ratio one has one (none) DX 10 Name and one FOURCC dxt4?
FOURCC DX 10 Name Description Alpha premultiplied? Compression ratio Texture Type
S3 Texture Compression
1356994
text text text text text text
2-1356994-1
S3TC Format Comparison
S3TC Format Comparison
DXT1 BC1 1-bit Alpha / Opaque N/A 6:1(for 24 bit source image) Simple non-alpha
DXT2 (none) Explicit alpha Yes 4:1 Sharp alpha
DXT3 BC2 Explicit alpha No 4:1 Sharp alpha
DXT4 (none) Interpolated alpha Yes 4:1 Gradient alpha
DXT5 BC3 Interpolated alpha No 4:1 Gradient alpha
SELECT Compression ratio FROM table WHERE DX 10 Name = (none) AND FOURCC = dxt4
(none) dxt4