27 GRAPHICS ENGINE (GE)
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
27-13
3.4.2 Color Depth Conversion
Table 27.
Image color depth
16 bpp
8 bpp
4 bpp
2 bpp
1 bpp
G
E
c
o
lo
r
d
ep
th
16 bpp
Not converted
8 to 16 bpp conversion CCT used (8 bits
×
16)
+ 8 to 16 bpp
conversion
CCT used (8 bits
×
4)
+ 8 to 16 bpp
conversion
CCT used (8 bits
×
2)
+ 8 to 16 bpp
conversion
8 bpp
–
Not converted
CCT used (8 bits
×
16)
CCT used (8 bits
×
4)
CCT used (8 bits
×
2)
4 bpp
–
–
Not converted
CCT used (8 bits
×
4)
CCT used (8 bits
×
2)
2 bpp
–
–
–
Not converted
CCT used (8 bits
×
2)
1 bpp
–
–
–
–
Not converted
–: Cannot be drawn. CCT: CCT in the file header or CCT1
Copy / COPY command (0x29)
Copies the rectangular area specified with the X and Y coordinates of the upper left and lower right corners to
the destination area specified within the work area. Drawing effects such as clipping and transparency that ap-
ply to the destination can also be specified.
Work area
(Clipping area)
X1
Y1
(0, 0)
(X2, Y2)
(X3, Y3)
Y2
Y3
X3
X2
(X1, Y1)
Copy
3.4.5 Image Copy
Figure 27.
This copy function can guarantee that the source image will be copied to the destination properly even if the
source and destination areas overlap one another.
Block transfer / BLKCOPY command (0x2a)
Transfers image data block between a specified area within the work area and memory or a built-in RAM LCD
driver (via USIL). The source and destination can be selected from four combinations in a command argument.
1. Memory
*
1
→
Work area
2. Work area
→
Memory
*
1
3. Work area
→
USIL
*
2
→
Built-in RAM LCD driver/panel (little endian)
4. Work area
→
USIL
*
2
→
Built-in RAM LCD driver/panel (big endian)
*
1: IVRAM (Area 3) or an external memory in Areas 13 to 22
*
2: LCD SPI mode or LCD parallel I/F mode
The USIL transmit data buffer address should be specified as the destination.
Work area
X1
Y1
(0, 0)
(X2, Y2)
Y2
X2
(X1, Y1)
Memory
Image data
USIL
Parallel I/F
or SPI
Built-in RAM
LCD driver/panel
Transmit
data buffer
3.4.6 Image Data Block Transfer
Figure 27.