Bridgetek FT801 - BITMAP_SIZE

FT800 Series Programmer Guide
Version 2.1
Document Reference No.: BRT_000030 Clearance No.: BRT#037
94
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4.8 BITMAP_SIZE
Specify the screen drawing of bitmaps for the current handle
Encoding
31 24
23 21
20
19
18
17 9
8 0
0x08
reserved
filter
wrapx
wrapy
width
height
Parameters
filter
Bitmap filtering mode, one of NEAREST or BILINEAR
The value of NEAREST is 0 and the value of BILINEAR is 1.
wrapx
Bitmap x wrap mode, one of REPEAT or BORDER
The value of BORDER is 0 and the value of REPEAT is 1.
wrapy
Bitmap y wrap mode, one of REPEAT or BORDER
width
Drawn bitmap width, in pixels
height
Drawn bitmap height, in pixels
Description
This command controls the drawing of bitmaps: the on-screen size of the bitmap,
the behavior for wrapping, and the filtering function. Please note that if wrapx or
wrapy is REPEAT then the corresponding memory layout dimension
(BITMAP_LAYOUT line stride or height) must be power of two, otherwise the result is
undefined.
For parameter width and height, the value from 1 to 511 means the bitmap width
and height in pixel. The value of zero means the 512 pixels in width or height.