Bridgetek FT801 - Command encoding

FT800 Series Programmer Guide
Version 2.1
Document Reference No.: BRT_000030 Clearance No.: BRT#037
82
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Parameters
Default values
Commands
Bitmap transform
coefficients
+1.0,0,0,0,+1.0,0
BITMAP_TRANSFORM_A-F
Stencil clear value
0
CLEAR_STENCIL
Tag clear value
0
CLEAR_TAG
Mask value of stencil
255
STENCIL_MASK
spass and sfail
KEEP,KEEP
STENCIL_OP
Tag buffer value
255
TAG
Tag mask value
1
TAG_MASK
Alpha clear value
0
CLEAR_COLOR_A
RGB clear color
(0,0,0)
CLEAR_COLOR_RGB
Each display list command in this section lists any graphics context it sets.
4.2 Command encoding
Each display list command has a 32-bit encoding. The most significant bits of the code
determine the command. Command parameters (if any) are present in the least
significant bits. Any bits marked reserved must be zero.
The graphics primitives supported by FT800 and their respective values are mentioned
below
Table 4 FT800 Graphics Primitives list
Graphics Primitive
Primitive value
BITMAPS
1
POINTS
2
LINES
3
LINE_STRIP
4
EDGE_STRIP_R
5
EDGE_STRIP_L
6
EDGE_STRIP_A
7
EDGE_STRIP_B
8
RECTS
9
Various bitmap formats supported by FT800 and their respective values are mentioned
below