FT800 Series Programmer Guide
Version 2.1
Document Reference No.: BRT_000030 Clearance No.: BRT#037
27
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2.5.5 Bitmap transformation matrix
To achieve the bitmap transformation, the bitmap transform matrix below is specified in
the FT800 and denoted as m
m =
by default m =
, it is named as identity matrix.
The coordinates
,
after transforming is calculated in following equation:
= m ×
i.e.:
where A,B,C,E,D,E,F stands for the values assigned by commands
BITMAP_TRANSFORM_A-F.
2.5.6 Color and transparency
The same bitmap can be drawn in more places on the screen, in different colors and
transparency:
dl(COLOR_RGB(255, 64, 64)); // red at (200, 120)
dl(VERTEX2II(200, 120, 0, 0));
dl(COLOR_RGB(64, 180, 64)); // green at (216, 136)
dl(VERTEX2II(216, 136, 0, 0));
dl(COLOR_RGB(255, 255, 64)); // transparent yellow at (232, 152)
dl(COLOR_A(150));
dl(VERTEX2II(232, 152, 0, 0));
Code snippet 10 color and transparency
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