References ▼
typedef struct _IMAGERESOLUTION{L_UINT uStructSize;L_INT nUnitOfResolution;L_INT nBitsPerPixel;L_FLOAT fHorzResolution;L_FLOAT fVertResolution;L_FLOAT fXScaling;L_FLOAT fYScaling;L_FLOAT fRotationAngle;L_FLOAT fLeftMargin;L_FLOAT fRightMargin;L_FLOAT fTopMargin;L_FLOAT fBottomMargin;} IMAGERESOLUTION, * pIMAGERESOLUTION;
The IMAGERESOLUTION structure provides information about the images effects.
| Member | Description | |
| uStructSize | Size of the IMAGERESOLUTION structure, in bytes, for versioning. Use the sizeof() macro to calculate the value. | |
| nUnitOfResolution | An integer having the unit of resolution to use. Possible values are (according to the TWAIN 1.9 specification): | |
| Value | Meaning | |
| TWUN_INCHES | Inches unit. | |
| TWUN_CENTIMETERS | Centimeters unit. | |
| TWUN_PICAS | Picas unit. | |
| TWUN_POINTS | Points unit. | |
| TWUN_TWIPS | Twips unit. | |
| TWUN_PIXELS | Pixels unit. | |
| nBitsPerPixel | Bits per pixel the acquired images will have. | |
| fHorzResolution | Horizontal resolution of the TWAIN source while acquiring the images. | |
| fVertResolution | Vertical resolution of the TWAIN source while acquiring the images. | |
| fXScaling | The acquired image X-direction scaling value before transferring. | |
| fYScaling | The acquired image X-direction scaling value before transferring. | |
| fRotationAngle | The acquired image rotation angle value before transfer. | |
| fLeftMargin | The left margin of the scanning area. | |
| fRightMargin | The right margin of the scanning area. | |
| fTopMargin | The top margin of the scanning area. | |
| fBottomMargin | The bottom margin of the scanning area. | |
pIMAGERESOLUTION is a pointer to a IMAGERESOLUTION structure. Where the function parameter type is pIMAGERESOLUTION, you can declare an IMAGERESOLUTION variable, update the structure's fields, and pass the variable's address in the parameter. Declaring a pIMAGERESOLUTION variable is necessary only if your program requires a pointer.
IMAGERESOLUTION is used with the LTWAINPROPERTIES structure.