luigi.font

interface Font ;

An abstract interface for any font rendering tech that wants to be used by Luigi

abstract float draw_char (dchar c);

Draw a character using OpenGL commands at position (0,0,0) in current OpenGL coordinates. Return the number of units along the baseline to advance.

abstract float draw_string (char[] str);

Draw a string using OpenGL commands at position (0,0,0) in current OpenGL coordinates. Return the number of units along the baseline to advance. A mixin is available to provide a default implementation of this based on draw_char.

abstract Rect string_rect (char[] str);

Return the bounding box of the string assuming it will be drawn at location (0,0). Thus the x,y positions tell you about the leading and descender. +--------------------+ | <--w--> | ^ | | | (0,0) | | h +------|--------------------|-|---- |(x,y) | v +--------------------+

abstract float height ();

Return the basic height of the font

abstract float width ();

Return width if font is fixed- width , or -1 if the font is proportional

abstract Size origin ();

Returns the location of the origin relative to a character's bounding box top-left corner. Below this would be something like (ox,oy)==(-5,7). Put another way, in order for the top left corner to appear at some (x,y) you should call draw_string with the coordinates set to (x+ox, y+oy)

(0,0)+------------+ | | | | (ox,oy) | | +------|------------|---- | | +------------+