al_set_shader_int_vector - Allegro 5 API

       Sets  an  integer  vector  array  uniform  of  the  current target bitmap’s shader.  The `num_components'
       parameter can take one of the values 1, 2, 3 or 4.  If it is 1  then  an  array  of  `num_elems'  integer
       elements  is  added.   Otherwise  each  added  array  element  is  assumed  to be a vector with 2, 3 or 4
       components in it.

       For example, if you have a GLSL uniform declared as uniform ivec3 flowers[4] or an HLSL uniform  declared
       as uniform int3 flowers[4], then you’d use this function from your code like so:

              int flowers[4][3] =
              {
                 {1, 2, 3},
                 {4, 5, 6},
                 {7, 8, 9},
                 {2, 5, 7}
              };

              al_set_shader_int_vector("flowers", 3, (int*)flowers, 4);

       Returns true on success.  Otherwise returns false, e.g. if the uniform by that name does not exist in the
       shader.

       al_set_shader_int_vector - Allegro 5 API

al_set_shader_float_vector(3alleg5), al_use_shader(3alleg5)

Allegro reference manual                                                       al_set_shader_int_vector(3alleg5)

       5.1.0

              #include <allegro5/allegro.h>

              bool al_set_shader_int_vector(const char *name,
                 int num_components, const int *i, int num_elems)