1991-2006
Silicon Graphics, Inc.
glIsEnabled
3G
glIsEnabled
test whether a capability is enabled
C Specification
GLboolean glIsEnabled
GLenum cap
Parameters
cap
Specifies a symbolic constant indicating a GL capability.
Description
glIsEnabled returns GL_TRUE if cap is an enabled capability
and returns GL_FALSE otherwise.
Initially all capabilities except GL_DITHER are disabled;
GL_DITHER is initially enabled.
The following capabilities are accepted for cap:
Constant
See
GL_BLEND
glBlendFunc
GL_CULL_FACE
glCullFace
GL_DEPTH_TEST
glDepthFunc, glDepthRangef
GL_DITHER
glEnable
GL_POLYGON_OFFSET_FILL
glPolygonOffset
GL_SAMPLE_ALPHA_TO_COVERAGE
glSampleCoverage
GL_SAMPLE_COVERAGE
glSampleCoverage
GL_SCISSOR_TEST
glScissor
GL_STENCIL_TEST
glStencilFunc, glStencilOp
Notes
If an error is generated,
glIsEnabled returns 0.
Errors
GL_INVALID_ENUM is generated if cap is not an accepted value.
See Also
glEnable,
glGet
Copyright
Copyright 1991-2006
Silicon Graphics, Inc. This document is licensed under the SGI
Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.