sed1374 ETC-unknow, sed1374 Datasheet - Page 150

• Manufacturer Part Number: sed1374
• Description: Sed1374 Embedded Memory Color Lcd Controller
• Manufacturer: ETC-unknow

Page 54
SED1374
X26A-G-002-02
Note
Note
int seVirtInit(int DevID, DWORD VirtX, DWORD * VirtY)
Description:
Parameter:
Return Value: ERR_OK - operation completed with no problems
int seVirtMove(int DevID, int Screen, int x, int y)
Description:
Parameter:
Return Value: ERR_OK - operation completed with no problems
The system must have been properly initialized prior to calling seVirtInit()
seVirtInit() must be been called before calling seVirtMove().
This function prepares the system for virtual screen operation. The programmer
passes the desired virtual width, in pixels, as VirtX. When the routine returns VirtY
will contain the maximum number of line that can be displayed at the requested
virtual width.
DevID
VirtX
VirtY
ERR_HAL_BAD_ARG - returned in three situations:
This routine pans and scrolls the display after a virtual display has bee setup. In the
case where split screen operation is being used the WhichScreen argument specifies
which screen to move. The x and y parameters specify, in pixels, the starting location
in the virtual image for the top left corner of the applicable display.
DevID
Screen
x
y
ERR_HAL_BAD_ARG- there are several reasons for this return value:
1) WhichScreen is not SCREEN1 or SCREEN2.
2) the y argument is greater than the last available line less the screen height.
- registered device ID
- horizontal size of virtual display in pixels.
- pointer to an integer to receive the maximum number of displayable
1) the virtual width (VirtX) is greater than the largest possible width
2) the virtual width is less than the physical width or
3) the maximum number of lines becomes less than the physical
- registered device ID
- must be set to 1 or 2, or use the constants SCREEN1 or SCREEN2,
- new starting X position in pixels
- new starting Y position in pixels
(Must be greater or equal to physical size of display)
lines of 'VirtX' width.
to identify which screen to base calculations on
(VirtX varies with color depth and ranges from 4096 pixels wider
number of lines
than the panel at 1 bit-per-pixel down to 512 pixels wider than the
panel at 8 bit-per-pixel)
Epson Research and Development
Programming Notes and Examples
Vancouver Design Center
Issue Date: 99/04/27