Epson S1D13705 Int seSetBitsPerPixelint BitsPerPixel, Int seGetBitsPerPixelint * pBitsPerPixel

Epson Research and Development	Page 53
Vancouver Design Center

int seSetBitsPerPixel(int BitsPerPixel)

Description: This routine sets the display color depth.

After performing validity checks to ensure the requested video mode can be set the appropriate registers are changed and the Look-Up Table is set its default values appropriate to the color depth.

This call is similar to a mode set call on a standard VGA.

Parameter: BitsPerPixel - desired color depth in bits per pixel. - Valid arguments are: 1, 2, 4, and 8.

Return Value: ERR_OK - operation completed with no problems

ERR_FAILED- possible causes for this error include:

1)the desired frame rate may not be attainable with the specified input clock

2)the combination of width, height and color depth may require more memory than is available on the S1D13705.

int seGetBitsPerPixel(int * pBitsPerPixel)

Description: This function reads the S1D13705 registers to determine the current color depth and returns the result in pBitsPerPixel.

Parameters: pBitsPerPixel - pointer to an integer to receive current color depth. - return values will be: 1, 2, 4, or 8.

Return Value: ERR_OK - operation completed with no problems

int seGetBytesPerScanline(int * pBytes)

Description: Determines the number of bytes per scan line of current display mode. It is assumed that the registers have already been correctly initialized before seGetBytesPer- Scanline() is called (i.e. after initializing the HAL, setting the Display mode and adjusting the bits per pixel or other values).

The number of bytes per scanline will include non-displayed bytes if the screen width is greater the display width, or in Default Portrait Mode.

Parameters: pBytes - pointer to an integer to receive the number of bytes per scan line

Return Value: ERR_OK - operation completed with no problems

Programming Notes and Examples	S1D13705
Issue Date: 02/01/22	X27A-G-002-03