MB86296 Datasheet, PDF (112/352 Pages) Fujitsu Component Limited. – PCI Graphics Controller Specification

FUJITSU LIMITED PRELIMINARY AND CONFIDENTIAL
10.1.2 Texture coordinates
Texture coordinate is a 2D coordinate system represented as S and T (S: horizontal, T: vertical).
Any integer in a range of −8192 to +8191 can be used as the S and T coordinates. The texture
coordinates is correlated to the 2D coordinates of a vertex. One texture pattern can be applied to up
to 4096 × 4096 pixels. The pattern size is set in the register. When the S and T coordinates exceed
the maximum pattern size, the repeat, cramp or border color option is selected.
S (max. ±8192)
max. 4096 pixels
Origin
Texture
pattern
10.1.3 Frame buffer
For drawing, the following area must be assigned to the Graphics Memory. The frame size (count of
pixels on X direction) is common for these areas.
Drawing frame
The results of drawing are stored in the graphical image data area. Both the direct and indirect
color mode are applicable.
Z buffer
Z buffer is required for eliminating hidden surfaces. In 16 bits mode, 2 bytes and in 8 bits mode, 1
byte are required per 1 pixel.
Polygon drawing flag buffer
This area is used for polygon drawing. 1 bit is required per 1 pixel.
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Specification Manual Rev0.1