Method function IGDIPlus.IGPFont.GetHeight(IGPGraphics) : Single
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Class: IGPFont
Contents |
Syntax
Delphi:
function GetHeight( graphics : IGPGraphics ) : Single;
C++ Builder:
float __fastcall GetHeight( IGPGraphics graphics );
Visual C++ (MFC):
GetHeight( graphics );
Summary
Gets the line spacing of this font in the current unit of a specified Graphics object.
Description
Call this method to get the line spacing of this font in the current unit of a specified Graphics object. The line spacing is the vertical distance between the base lines of two consecutive lines of text. Thus, the line spacing includes the blank space between lines along with the height of the character itself.
Remarks
If the font unit is set to anything other than UnitPixel, the
height, in pixels, is calculated using the vertical
resolution of the specified Graphics object. For example,
suppose the font unit is inches and the font size is 0.3.
Also suppose that for the corresponding font family, the em
height is 2048 and the line spacing is 2355. If the unit of
the Graphics object is UnitPixel and the vertical resolution
of the Graphics object is 96 dots per inch, the height is
calculated as follows:
2355*(0.3/2048)*96 = 33.1171875
Continuing with the same example, suppose the unit of the Graphics object is something other than UnitPixel, say UnitMillimeter. Then (using 1 inch = 25.4 millimeters) the height, in millimeters, is calculated as follows:
2355*(0.3/2048)25.4 = 8.762256
