Vocabulary
opengl.capabilities

Inputs and outputs

version	A version string
extensions	A sequence of extension name strings

Word description
Throws an exception if neither has-gl-version? nor has-gl-extensions? returns true for version or extensions, respectively. Intended for use when required OpenGL functionality can be verified either by a minimum version or a set of equivalent extensions.

See also
require-gl-version, require-glsl-version, require-gl-extensions, has-gl-version?, has-glsl-version?, has-gl-extensions?, has-gl-version-or-extensions?, gl-version, glsl-version, gl-extensions

Definition

USING: arrays kernel make sequences ;

IN: opengl.capabilities

: require-gl-version-or-extensions
( version extensions -- )
2array
[ first2 has-gl-version-or-extensions? ] [
dup first (make-gl-version-error) "\n" %
second (make-gl-extensions-error) "\n" %
] (require-gl) ;