Legacy Document

Inside Macintosh: Imaging With QuickDraw /

Chapter 3 - QuickDraw Drawing / QuickDraw Drawing Reference

Routines / Customizing QuickDraw Operations

StdTxtMeas

The StdTxtMeas function is QuickDraw's standard low-level routine for measuring text width.

FUNCTION StdTxtMeas (byteCount:\xDDInteger; textAddr:\xDDPtr; 
                    VAR numer,denom:\xDDPoint; 
                    VAR info:\xDDFontInfo):\xDDInteger;

byteCount

The number of text bytes to measure.

textAddr

A pointer to the memory structure containing the text.

numer

Scaling numerator.

denom

Scaling denominator.

info

A FontInfo record.

DESCRIPTION

The StdTxtMeas function returns the width of the text stored in the arbitrary structure in memory specified by textAddr, starting with the first byte and continuing for byteCount bytes. The numer and denom parameters specify the scaling as in the StdText procedure; note that StdTxtMeas may change them.

SPECIAL CONSIDERATIONS

The StdTxtMeas function may move or purge memory blocks in the application heap. Your application should not call this function at interrupt time.

SEE ALSO

QuickDraw's text-drawing capabilities are described in the chapter "QuickDraw Text" in Inside Macintosh: Text.