IMAGERESOLUTION

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 image's resolution.

Members

L_UINT uStructSize

Size of the IMAGERESOLUTION structure, in bytes, for versioning. Use the sizeof() operator to calculate the value.

L_INT nUnitOfResolution

An integer specifying the unit of resolution to use. Possible values are (according to the TWAIN specification):

L_INT nBitsPerPixel

Bits per pixel the acquired images will have.

L_FLOAT fHorzResolution

Horizontal resolution of the TWAIN source while acquiring the images.

L_FLOAT fVertResolution

Vertical resolution of the TWAIN source while acquiring the images.

L_FLOAT fXScaling

The acquired image X-direction scaling value before transferring.

L_FLOAT fYScaling

The acquired image X-direction scaling value before transferring.

L_FLOAT fRotationAngle

The acquired image rotation angle value before transfer.

L_FLOAT fLeftMargin

The left margin of the scanning area.

L_FLOAT fRightMargin

The right margin of the scanning area.

L_FLOAT fTopMargin

The top margin of the scanning area.

L_FLOAT fBottomMargin

The bottom margin of the scanning area.

Comments

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.