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GLISENABLED(3G)			 OpenGL Manual		       GLISENABLED(3G)

NAME
       glIsEnabled,_glIsEnabledi - test whether a capability is enabled

C SPECIFICATION
       GLboolean glIsEnabled(GLenum cap);

       GLboolean glIsEnabledi(GLenum cap, GLuint index);

PARAMETERS
       cap
	   Specifies a symbolic constant indicating a GL capability.

       index
	   Specifies the index of the capability.

DESCRIPTION
       glIsEnabled returns GL_TRUE if cap is an enabled capability and returns
       GL_FALSE otherwise. Boolean states that are indexed may be tested with
       glIsEnabledi. For glIsEnabledi, index specifies the index of the
       capability to test.  index must be between zero and the count of
       indexed capabilities for cap. 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(), glLogicOp()  │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_CLIP_DISTANCEi		 │ glEnable()		       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_COLOR_LOGIC_OP		 │ glLogicOp()		       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_CULL_FACE			 │ glCullFace()		       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_DEPTH_CLAMP			 │ glEnable()		       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_DEBUG_OUTPUT			 │ glEnable()		       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_DEBUG_OUTPUT_SYNCHRONOUS	 │ glEnable()		       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_DEPTH_TEST			 │ glDepthFunc(),	       │
       │				 │ glDepthRange()	       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_DITHER			 │ glEnable()		       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_FRAMEBUFFER_SRGB		 │ glEnable()		       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_LINE_SMOOTH			 │ glLineWidth()	       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_MULTISAMPLE			 │ glSampleCoverage()	       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_POLYGON_SMOOTH		 │ glPolygonMode()	       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_POLYGON_OFFSET_FILL		 │ glPolygonOffset()	       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_POLYGON_OFFSET_LINE		 │ glPolygonOffset()	       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_POLYGON_OFFSET_POINT		 │ glPolygonOffset()	       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_PROGRAM_POINT_SIZE		 │ glEnable()		       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_PRIMITIVE_RESTART		 │ glEnable(),		       │
       │				 │ glPrimitiveRestartIndex()   │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_SAMPLE_ALPHA_TO_COVERAGE	 │ glSampleCoverage()	       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_SAMPLE_ALPHA_TO_ONE		 │ glSampleCoverage()	       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_SAMPLE_COVERAGE		 │ glSampleCoverage()	       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_SAMPLE_MASK			 │ glEnable()		       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_SCISSOR_TEST			 │ glScissor()		       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_STENCIL_TEST			 │ glStencilFunc(),	       │
       │				 │ glStencilOp()	       │
       ├─────────────────────────────────┼─────────────────────────────┤
       │GL_TEXTURE_CUBEMAP_SEAMLESS	 │ glEnable()		       │
       └─────────────────────────────────┴─────────────────────────────┘

NOTES
       If an error is generated, glIsEnabled and glIsEnabledi return GL_FALSE.

       GL_DEBUG_OUTPUT and GL_DEBUG_OUTPUT_SYNCHRONOUS are available only if
       the GL version is 4.3 or greater.

ERRORS
       GL_INVALID_ENUM is generated if cap is not an accepted value.

       GL_INVALID_VALUE is generated by glIsEnabledi if index is outside the
       valid range for the indexed state cap.

SEE ALSO
       glEnable(), glDisable(), glGet()

COPYRIGHT
       Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2011
       Khronos Group. This document is licensed under the SGI Free Software B
       License. For details, see http://oss.sgi.com/projects/FreeB/.

AUTHORS
       opengl.org

opengl.org			  03/16/2013		       GLISENABLED(3G)

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