NAME

       ALLEGRO_PRIM_STORAGE - Allegro 5 API

SYNOPSIS

              #include <allegro5/allegro_primitives.h>

              typedef enum ALLEGRO_PRIM_STORAGE

DESCRIPTION

       Enumerates the types of storage an attribute of a custom vertex may be stored in.  Many of these can only
       be  used  for  ALLEGRO_PRIM_USER_ATTR attributes and can only be accessed via shaders.  Usually no matter
       what the storage is specified the attribute gets converted to single precision floating  point  when  the
       shader   is   run.    Despite   that,   it  may  be  advantageous  to  use  more  dense  storage  formats
       (e.g. ALLEGRO_PRIM_NORMALIZED_UBYTE_4 instead of ALLEGRO_PRIM_FLOAT_4) when bandwidth (amount  of  memory
       sent to the GPU) is an issue but precision is not.

       • ALLEGRO_PRIM_FLOAT_1 - A single float

         Since: 5.1.6

       • ALLEGRO_PRIM_FLOAT_2 - A doublet of floats

       • ALLEGRO_PRIM_FLOAT_3 - A triplet of floats

       • ALLEGRO_PRIM_FLOAT_4 - A quad of floats

         Since: 5.1.6

       • ALLEGRO_PRIM_SHORT_2 - A doublet of shorts

       • ALLEGRO_PRIM_SHORT_4 - A quad of shorts

         Since: 5.1.6

       • ALLEGRO_PRIM_UBYTE_4 - A quad of unsigned bytes

         Since: 5.1.6

       • ALLEGRO_PRIM_NORMALIZED_SHORT_2 - A doublet of shorts.  Before being sent to the shader, each component
         is divided by 32767.  Each component of the resultant float doublet ranges between -1.0 and 1.0

         Since: 5.1.6

       • ALLEGRO_PRIM_NORMALIZED_SHORT_4 - A quad of shorts.  Before being sent to the shader, each component is
         divided by 32767.  Each component of the resultant float quad ranges between -1.0 and 1.0

         Since: 5.1.6

       • ALLEGRO_PRIM_NORMALIZED_UBYTE_4  -  A  quad  of  unsigned bytes.  Before being sent to the shader, each
         component is divided by 255.  Each component of the resultant float quad ranges between 0.0 and 1.0

         Since: 5.1.6

       • ALLEGRO_PRIM_NORMALIZED_USHORT_2 - A doublet of unsigned shorts.  Before being sent to the shader, each
         component is divided by 65535.  Each component of the resultant float doublet ranges  between  0.0  and
         1.0

         Since: 5.1.6

       • ALLEGRO_PRIM_NORMALIZED_USHORT_4  -  A  quad of unsigned shorts.  Before being sent to the shader, each
         component is divided by 65535.  Each component of the resultant float quad ranges between 0.0 and 1.0

         Since: 5.1.6

       • ALLEGRO_PRIM_HALF_FLOAT_2 - A doublet of half-precision floats.  Note that this storage format  is  not
         supported  on  all  platforms.   al_create_vertex_decl(3alleg5) will return NULL if you use it on those
         platforms

         Since: 5.1.6

       • ALLEGRO_PRIM_HALF_FLOAT_4 - A quad of half-precision floats.  Note that  this  storage  format  is  not
         supported  on  all  platforms.   al_create_vertex_decl(3alleg5) will return NULL if you use it on those
         platforms.

         Since: 5.1.6

SEE ALSO

       ALLEGRO_PRIM_ATTR(3alleg5)

Allegro reference manual                                                           ALLEGRO_PRIM_STORAGE(3alleg5)