Samsung S3C6400X User Manual page 381

S3C6400X RISC MICROPROCESSOR
WINDOW BLENDING
Overview
The main function of the VPRCS module is window blending. Display controller has 5 window layers and the
details are described below. For example, System can use win0 as a OS window, full TV screen window or etc.,
win1 as a small (next channel ) TV screen with win2 as a menu, win3 as a caption, win 4 as a channel
information. Win3 and win4 has the color limitation by using color index with Color LUT. This feature enhances the
system performance by reducing the data rate of total system.
Total 5 window (example)
win 0 (base)
win 1 (Overlay1)
win 2 (Overlay2)
win 3 (Caption)
win 4 (Cursor)
Overlay Priority
Win 4 > Win 3 > Win 2 > Win 1 > Win 0
Color Key
:The register value to Color-Key reg must be set by 24bit RGB format
Blending equation
Win01(R) = Win0(R) x Beta + Win1(R) x Alpha
Win01(G) = Win0(G) x Beta + Win1(G) x Alpha
Win01(B) = Win0(B) x Beta + Win1(B) x Alpha
Win012(R) = Win01(R) x Beta + Win2(R) x Alpha
Win012(G) = Win01(G) x Beta + Win2(G) x Alpha
Win012(B) = Win01(B) x Beta + Win2(B) x Alpha
Win0123(R) = Win012(R) x Beta + Win3(R) x Alpha
Win0123(G) = Win012(G) x Beta + Win3(G) x Alpha
Win0123(B) = Win012(B) x Beta + Win3(B) x Alpha
: Local / (YCbCr ,RGB without palette)
: RGB with palette
: RGB with palette
: RGB (1/2/4) with 16 level Color LUT
: RGB (1/2) with 4 level Color LUT
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
DISPLAY CONTROLLER
14-19