S1D13705 Epson Electronics America, Inc., S1D13705 Datasheet - Page 149

• Manufacturer Part Number: S1D13705
• Description: S1d13705 Embedded Memory Lcd Controller
• Manufacturer: Epson Electronics America, Inc.

Epson Research and Development
Vancouver Design Center
Programming Notes and Examples
Issue Date: 01/02/13
Note
Note
Description:
Parameter:
Return Value: ERR_OK - operation completed with no problems
Description:
Parameter:
Return Value: ERR_OK - operation completed with no problems
int seVirtInit(DWORD VirtX, DWORD * VirtY)
int seVirtMove(int Screen, int x, int y)
The system must have been 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. When the routine returns VirtY will contain
the maximum number of line that can be displayed at the requested virtual width.
VirtX
VirtY
ERR_HAL_BAD_ARG - returned in three situations:
This routine pans and scrolls the display. In the case where split screen operation is
being used, the Screen argument specifies which screen to move. The x and y param-
eters specify, in pixels, the starting location in the virtual image for the top left
corner of the applicable display.
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.
- 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
- 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)
X27A-G-002-02
S1D13705
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