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)