GetCharABCWidthsA function

The GetCharABCWidths function retrieves the widths, in logical units, of consecutive characters in a specified range from the current TrueType font. This function succeeds only with TrueType fonts.

Syntax

BOOL GetCharABCWidthsA(
  HDC   hdc,
  UINT  wFirst,
  UINT  wLast,
  LPABC lpABC
);

Parameters

hdc

A handle to the device context.

wFirst

The first character in the group of consecutive characters from the current font.

wLast

The last character in the group of consecutive characters from the current font.

lpABC

A pointer to an array of ABC structures that receives the character widths, in logical units. This array must contain at least as many ABC structures as there are characters in the range specified by the uFirstChar and uLastChar parameters.

Return Value

If the function succeeds, the return value is nonzero

If the function fails, the return value is zero.

Remarks

The TrueType rasterizer provides ABC character spacing after a specific point size has been selected. A spacing is the distance added to the current position before placing the glyph. B spacing is the width of the black part of the glyph. C spacing is the distance added to the current position to provide white space to the right of the glyph. The total advanced width is specified by A+B+C.

When the GetCharABCWidths function retrieves negative A or C widths for a character, that character includes underhangs or overhangs.

To convert the ABC widths to font design units, an application should use the value stored in the otmEMSquare member of a OUTLINETEXTMETRIC structure. This value can be retrieved by calling the GetOutlineTextMetrics function.

The ABC widths of the default character are used for characters outside the range of the currently selected font.

To retrieve the widths of characters in non-TrueType fonts, applications should use the GetCharWidth function.

Requirements

   
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header wingdi.h (include Windows.h)
Library Gdi32.lib
DLL Gdi32.dll

See Also

ABC

Font and Text Functions

Fonts and Text Overview

GetCharWidth

GetOutlineTextMetrics

OUTLINETEXTMETRIC