merge_fonts (3) Linux Manual Page

merge_fonts – Merges two fonts into one font. Allegro game programming library.

Synopsis

#include <allegro.h>

FONT *merge_fonts(FONT *f1, FONT *f2)

Description

This function merges the character ranges from two fonts and returns a new font containing all characters in the old fonts. In general, you cannot merge fonts of different types (eg, TrueType fonts and bitmapped fonts), but as a special case, this function can promote a monochrome bitmapped font to a color font and merge those. Example:

 FONT *myfont;

 FONT *myfancy_font;

 FONT *lower_range;

 FONT *upper_range;

 FONT *capitals;

 FONT *combined_font;

 FONT *tempfont;

 …

 /* Create a font that contains the capitals from */

 /* the fancy font but other characters from myfont */

 lower_range = extract_font_range(myfont, -1, ‘A’-1);

 upper_range = extract_font_range(myfont, ‘Z’+1, -1);

 capitals = extract_font_range(myfancy_font, ‘A’, ‘Z’);

 tempfont = merge_fonts(lower_range, capitals);

 combined_font = merge_fonts(tempfont, upper_range);
 /* Clean up temporary fonts */

 destroy_font(lower_range);

 destroy_font(upper_range);

 destroy_font(capitals);

 destroy_font(tempfont);

Return Value

Returns a pointer to the new font or NULL on error. Remember that you are responsible for destroying the font when you are finished with it to avoid memory leaks.

See Also

extract_font_range(3), is_trans_font(3), is_color_font(3), is_mono_font(3), exfont(3)