Texture Coordinates
i740 uses a S15.16 format for texture coordinates
- 32 bits, 16 bit fraction, 1 bit sign, 15 bit integer magnitude
- Coordinate system is (s, t)
Texture maps must be rectangular
- each dimension a power of 2 (I.e, 32 x 16, 64 x 64), etc. (u => 2N, v => 2M)
- 2K requirement make it easier to map from texture coordinates to texture pixel
- Coordinate system is (u, v)
Scan converter provides Texture coordinates for each fragment