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