man text_length () - Returns the length of a string in pixels. Allegro game programming library.
NAME
text_length - Returns the length of a string in pixels. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
int text_length(const FONT *f, const char *str);
DESCRIPTION
Returns the length (in pixels) of a string in the specified font. Example:
int width = text_length(font, "I love spam"); ... bmp = create_bitmap(width, height);