This function will replace a sprite font that you created previously using the function font_add_sprite_ext. It uses a "sprite strip", where each sub-image is be an individual symbol or letter, and the images are mapped to letters based on the argument "string_map" of the function. This argument is a string that you can use to tell GameMaker Studio 2 what order the sub-images of the sprite font are and it will map these automatically when writing text. So, for example, if you have a string-map of "AaBbCcDdEeFfGgHh", your sprite font must have the sub-images ordered in this way.
You can also set the spacing for the font to be proportional (true) or not (false), where a proportional font is spaced based on the actual width of the letters (so the letter "i" takes less room than the letter "w", for example) while a non-proportional font will be spaced based on the sub-image width, like a monospaced font. Finally, you can define the space to leave between each letter when writing, and this can be any integer value, with 0 being no space (the letters will "touch" if proportional). The function returns an index value that should be stored in a variable as this will be needed in all further codes that refer to this font.NOTE: This function requires you to have previously added a sprite font using font_add_sprite(), as it will replace that and cannot be used on fonts that are included as part of the game resources.IMPORTANT! This function is not available with the Trial Licence of the product.
font_replace_sprite_ext(font, spr, string_map, prop, sep);
Argument Description font The font to replace. spr The sprite to add a font based on. string_map String from which sprite sub-image order is taken. prop Set as proportional font or not. sep The space to leave between each letter.
"0123456789+-*/=", true, 2);
The above code will replace a sprite font asset that is indexed in the variable "global.Font" with sprite images indexed in the variable "spr_CalcFont".