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 an 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.