IMAGEEFFECTS

typedef struct _IMAGEEFFECTS
{
   L_UINT   uStructSize;
   L_INT nPixFlavor;
   L_INT nColorScheme;
   L_FLOAT fHighLight;
   L_FLOAT fShadow;
   L_FLOAT fBrightness;
   L_FLOAT fContrast;
   L_TCHAR szHalfTone[32];
} IMAGEEFFECTS,  * pIMAGEEFFECTS;

The IMAGEEFFECTS structure provides information about the image effects.

Member	Description
uStructSize	Size of the IMAGEEFFECTS structure, in bytes, for versioning. Use the sizeof() macro to calculate the value.
nPixFlavor	Pixel flavor used when acquiring. Possible values are (according to the TWAIN 1.9 specification):
	Value	Meaning
	TWPF_CHOCOLATE	Zero stands for the darkest shade.
	TWPF_VANILLA	Zero stands for the lightest shade.
nColorScheme	Color scheme to use when scanning is to be done. Possible values are (according to the TWAIN 1.9 specification):
	Value	Meaning
	TWPT_BW	Black and White (1 bit).
	TWPT_GRAY	8-bit Gray Scale
	TWPT_RGB	24-bit RGB Color.
	TWPT_PALETTE	8-bit Color.
	TWPT_CMY	CYAN, magenta, yellow color space.
	TWPT_CMYK	CYAN, magenta, yellow, black color space.
	TWPT_YUV	Color space type that is true color encoding. It uses one luminance value (Y) and two chroma values (UV).
	TWPT_YUVK	The same as YUV with an additional black variable.
	TWPT_CIEXYZ	Chromaticity diagram.
fHighLight	Highlight value.
fShadow	Shadow value.
fBrightness	Brightness value.
fContrast	Contrast value.
szHalfTone	A string having the name of the used pattern.

Comments

pIMAGEEFFECTS is a pointer to a IMAGEEFFECTS structure. Where the function parameter type is pIMAGEEFFECTS, you can declare an IMAGEEFFECTS variable, update the structure's fields, and pass the variable's address in the parameter. Declaring a pIMAGEEFFECTS variable is necessary only if your program requires a pointer.

IMAGEEFFECTS is used with the LTWAINPROPERTIES structure.