NAME

       glDrawElements - render primitives from array data

C SPECIFICATION

       void glDrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid * indices);

PARAMETERS

       mode
           Specifies what kind of primitives to render. Symbolic constants GL_POINTS,
           GL_LINE_STRIP, GL_LINE_LOOP, GL_LINES, GL_LINE_STRIP_ADJACENCY, GL_LINES_ADJACENCY,
           GL_TRIANGLE_STRIP, GL_TRIANGLE_FAN, GL_TRIANGLES, GL_TRIANGLE_STRIP_ADJACENCY,
           GL_TRIANGLES_ADJACENCY and GL_PATCHES are accepted.

       count
           Specifies the number of elements to be rendered.

       type
           Specifies the type of the values in indices. Must be one of GL_UNSIGNED_BYTE,
           GL_UNSIGNED_SHORT, or GL_UNSIGNED_INT.

       indices
           Specifies a pointer to the location where the indices are stored.

DESCRIPTION

       glDrawElements specifies multiple geometric primitives with very few subroutine calls.
       Instead of calling a GL function to pass each individual vertex, normal, texture
       coordinate, edge flag, or color, you can prespecify separate arrays of vertices, normals,
       and so on, and use them to construct a sequence of primitives with a single call to
       glDrawElements.

       When glDrawElements is called, it uses count sequential elements from an enabled array,
       starting at indices to construct a sequence of geometric primitives.  mode specifies what
       kind of primitives are constructed and how the array elements construct these primitives.
       If more than one array is enabled, each is used.

       Vertex attributes that are modified by glDrawElements have an unspecified value after
       glDrawElements returns. Attributes that aren't modified maintain their previous values.

NOTES

       GL_LINE_STRIP_ADJACENCY, GL_LINES_ADJACENCY, GL_TRIANGLE_STRIP_ADJACENCY and
       GL_TRIANGLES_ADJACENCY are available only if the GL version is 3.2 or greater.

ERRORS

       GL_INVALID_ENUM is generated if mode is not an accepted value.

       GL_INVALID_VALUE is generated if count is negative.

       GL_INVALID_OPERATION is generated if a geometry shader is active and mode is incompatible
       with the input primitive type of the geometry shader in the currently installed program
       object.

       GL_INVALID_OPERATION is generated if a non-zero buffer object name is bound to an enabled
       array or the element array and the buffer object's data store is currently mapped.

VERSION SUPPORT

       ┌───────────────┬───────────────────────────────────────────────────────────────────────┐
       │               │                OpenGL Version                                         │
       ├───────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
       │Function       │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
       │/              │     │     │     │     │     │     │     │     │     │     │     │     │
       │Feature        │     │     │     │     │     │     │     │     │     │     │     │     │
       │Name           │     │     │     │     │     │     │     │     │     │     │     │     │
       ├───────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │glDrawElements │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
       └───────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘

SEE ALSO

       glDrawArrays(), glDrawElementsInstanced(), glDrawElementsBaseVertex(),
       glDrawRangeElements()

COPYRIGHT

       Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014 Khronos Group. This
       document is licensed under the SGI Free Software B License. For details, see
       http://oss.sgi.com/projects/FreeB/.

COPYRIGHT

       Copyright © 1991-2006 Silicon Graphics, Inc.
       Copyright © 2010-2014 Khronos Group

[FIXME: source]                             01/03/2018                         GLDRAWELEMENTS(3G)