Provided by: allegro5-doc_5.2.3.0-1_all 

NAME
al_scale_transform - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro.h>
void al_scale_transform(ALLEGRO_TRANSFORM *trans, float sx, float sy)
DESCRIPTION
Apply a scale to a transformation.
Parameters:
• trans - Transformation to alter
• sx, sy - Scale
SEE ALSO
al_translate_transform(3alleg5), al_rotate_transform(3alleg5), al_build_transform(3alleg5)
Allegro reference manual al_scale_transform(3alleg5)