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)