Text transparency Allegro 5

Question

Been using al_draw_textf for drawing text to screen and it works perfect.. except text transparency. Wondering if anyone knows how to make al_draw_textf or another allegro function/(or maybe shaders) display text with functionality to fade opacity. Appreciate it

Answer 1

You can use al_map_rgba() to set transparency with al_draw_textf For example, al_draw_textf(font, al_map_rgba(0,0,0,100),0,0,0,"Transparent"); will draw the the text black, but semi transparent. The last argument in al_map_rgba() is the alpha channel, which controls transparency (255 being opaque, 0 being transparent).