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GLENABLE(3G)							  GLENABLE(3G)

NAME
       glEnable, glDisable - enable or disable server-side GL capabilities

C SPECIFICATION
       void glEnable( GLenum cap )

PARAMETERS
       cap    Specifies a symbolic constant indicating a GL capability.

C SPECIFICATION
       void glDisable( GLenum cap )

PARAMETERS
       cap    Specifies a symbolic constant indicating a GL capability.

DESCRIPTION
       glEnable and glDisable enable and disable various capabilities.	Use
       glIsEnabled or glGet to determine the current setting of any
       capability. The initial value for each capability with the exception of
       GL_DITHER is GL_FALSE. The initial value for GL_DITHER is GL_TRUE.

       Both glEnable and glDisable take a single argument, cap, which can
       assume one of the following values:

       GL_ALPHA_TEST		If enabled, do alpha testing. See glAlphaFunc.

       GL_AUTO_NORMAL		If enabled, generate normal vectors when
				either GL_MAP2_VERTEX_3 or GL_MAP2_VERTEX_4 is
				used to generate vertices.  See glMap2.

       GL_BLEND			If enabled, blend the incoming RGBA color
				values with the values in the color buffers.
				See glBlendFunc.

       GL_CLIP_PLANEi		If enabled, clip geometry against user-defined
				clipping plane i.  See glClipPlane.

       GL_COLOR_LOGIC_OP	If enabled, apply the currently selected
				logical operation to the incoming RGBA color
				and color buffer values. See glLogicOp.

       GL_COLOR_MATERIAL	If enabled, have one or more material
				parameters track the current color.  See
				glColorMaterial.

       GL_COLOR_TABLE		If enabled, preform a color table lookup on
				the incoming RGBA color values.	 See
				glColorTable.

       GL_CONVOLUTION_1D	If enabled, perform a 1D convolution operation
				on incoming RGBA color values.	See
				glConvolutionFilter1D.

       GL_CONVOLUTION_2D	If enabled, perform a 2D convolution operation
				on incoming RGBA color values.	See
				glConvolutionFilter2D.

       GL_CULL_FACE		If enabled, cull polygons based on their
				winding in window coordinates.	See
				glCullFace.

       GL_DEPTH_TEST		If enabled, do depth comparisons and update
				the depth buffer. Note that even if the depth
				buffer exists and the depth mask is non-zero,
				the depth buffer is not updated if the depth
				test is disabled. See glDepthFunc and
				glDepthRange.

       GL_DITHER		If enabled, dither color components or indices
				before they are written to the color buffer.

       GL_FOG			If enabled, blend a fog color into the
				posttexturing color.  See glFog.

       GL_HISTOGRAM		If enabled, histogram incoming RGBA color
				values.	 See glHistogram.

       GL_INDEX_LOGIC_OP	If enabled, apply the currently selected
				logical operation to the incoming index and
				color buffer indices. See
				glLogicOp.

       GL_LIGHTi		If enabled, include light i in the evaluation
				of the lighting equation. See glLightModel and
				glLight.

       GL_LIGHTING		If enabled, use the current lighting
				parameters to compute the vertex color or
				index.	Otherwise, simply associate the
				current color or index with each vertex. See
				glMaterial, glLightModel, and glLight.

       GL_LINE_SMOOTH		If enabled, draw lines with correct filtering.
				Otherwise, draw aliased lines.	See
				glLineWidth.

       GL_LINE_STIPPLE		If enabled, use the current line stipple
				pattern when drawing lines. See glLineStipple.

       GL_MAP1_COLOR_4		If enabled, calls to glEvalCoord1,
				glEvalMesh1, and glEvalPoint1 generate RGBA
				values.	 See glMap1.

       GL_MAP1_INDEX		If enabled, calls to glEvalCoord1,
				glEvalMesh1, and glEvalPoint1 generate color
				indices.  See glMap1.

       GL_MAP1_NORMAL		If enabled, calls to glEvalCoord1,
				glEvalMesh1, and glEvalPoint1 generate
				normals.  See glMap1.

       GL_MAP1_TEXTURE_COORD_1	If enabled, calls to glEvalCoord1,
				glEvalMesh1, and glEvalPoint1 generate s
				texture coordinates.  See glMap1.

       GL_MAP1_TEXTURE_COORD_2	If enabled, calls to glEvalCoord1,
				glEvalMesh1, and glEvalPoint1 generate s and t
				texture coordinates.  See glMap1.

       GL_MAP1_TEXTURE_COORD_3	If enabled, calls to glEvalCoord1,
				glEvalMesh1, and glEvalPoint1 generate s, t,
				and r texture coordinates.  See glMap1.

       GL_MAP1_TEXTURE_COORD_4	If enabled, calls to glEvalCoord1,
				glEvalMesh1, and glEvalPoint1 generate s, t,
				r, and q texture coordinates.  See glMap1.

       GL_MAP1_VERTEX_3		If enabled, calls to glEvalCoord1,
				glEvalMesh1, and glEvalPoint1 generate x, y,
				and z vertex coordinates.  See glMap1.

       GL_MAP1_VERTEX_4		If enabled, calls to glEvalCoord1,
				glEvalMesh1, and glEvalPoint1 generate
				homogeneous x, y, z, and w vertex coordinates.
				See glMap1.

       GL_MAP2_COLOR_4		If enabled, calls to glEvalCoord2,
				glEvalMesh2, and glEvalPoint2 generate RGBA
				values.	 See glMap2.

       GL_MAP2_INDEX		If enabled, calls to glEvalCoord2,
				glEvalMesh2, and glEvalPoint2 generate color
				indices.  See glMap2.

       GL_MAP2_NORMAL		If enabled, calls to glEvalCoord2,
				glEvalMesh2, and glEvalPoint2 generate
				normals.  See glMap2.

       GL_MAP2_TEXTURE_COORD_1	If enabled, calls to glEvalCoord2,
				glEvalMesh2, and glEvalPoint2 generate s
				texture coordinates.  See glMap2.

       GL_MAP2_TEXTURE_COORD_2	If enabled, calls to glEvalCoord2,
				glEvalMesh2, and glEvalPoint2 generate s and t
				texture coordinates.  See glMap2.

       GL_MAP2_TEXTURE_COORD_3	If enabled, calls to glEvalCoord2,
				glEvalMesh2, and glEvalPoint2 generate s, t,
				and r texture coordinates.  See glMap2.

       GL_MAP2_TEXTURE_COORD_4	If enabled, calls to glEvalCoord2,
				glEvalMesh2, and glEvalPoint2 generate s, t,
				r, and q texture coordinates.  See glMap2.

       GL_MAP2_VERTEX_3		If enabled, calls to glEvalCoord2,
				glEvalMesh2, and glEvalPoint2 generate x, y,
				and z vertex coordinates.  See glMap2.

       GL_MAP2_VERTEX_4		If enabled, calls to glEvalCoord2,
				glEvalMesh2, and glEvalPoint2 generate
				homogeneous x, y, z, and w vertex coordinates.
				See glMap2.

       GL_MINMAX		If enabled, compute the minimum and maximum
				values of incoming RGBA color values.  See
				glMinmax.

       GL_NORMALIZE		If enabled, normal vectors specified with
				glNormal are scaled to unit length after
				transformation. See glNormal.

       GL_POINT_SMOOTH		If enabled, draw points with proper filtering.
				Otherwise, draw aliased points.	 See
				glPointSize.

       GL_POLYGON_OFFSET_FILL	If enabled, and if the polygon is rendered in
				GL_FILL mode, an offset is added to depth
				values of a polygon's fragments before the
				depth comparison is performed.	See
				glPolygonOffset.

       GL_POLYGON_OFFSET_LINE	If enabled, and if the polygon is rendered in
				GL_LINE mode, an offset is added to depth
				values of a polygon's fragments before the
				depth comparison is performed. See
				glPolygonOffset.

       GL_POLYGON_OFFSET_POINT	If enabled, an offset is added to depth values
				of a polygon's fragments before the depth
				comparison is performed, if the polygon is
				rendered in GL_POINT mode. See
				glPolygonOffset.

       GL_POLYGON_SMOOTH	If enabled, draw polygons with proper
				filtering.  Otherwise, draw aliased polygons.
				For correct anti-aliased polygons, an alpha
				buffer is needed and the polygons must be
				sorted front to back.

       GL_POLYGON_STIPPLE	If enabled, use the current polygon stipple
				pattern when rendering polygons. See
				glPolygonStipple.

       GL_POST_COLOR_MATRIX_COLOR_TABLE
				If enabled, preform a color table lookup on
				RGBA color values after color matrix
				transformation.	 See glColorTable.

       GL_POST_CONVOLUTION_COLOR_TABLE
				If enabled, preform a color table lookup on
				RGBA color values after convolution.  See
				glColorTable.

       GL_RESCALE_NORMAL	If enabled, normal vectors specified with
				glNormal are scaled to unit length after
				transformation. See glNormal.

       GL_SEPARABLE_2D		If enabled, perform a two-dimensional
				convolution operation using a separable
				convolution filter on incoming RGBA color
				values.	 See glSeparableFilter2D.

       GL_SCISSOR_TEST		If enabled, discard fragments that are outside
				the scissor rectangle.	See glScissor.

       GL_STENCIL_TEST		If enabled, do stencil testing and update the
				stencil buffer.	 See glStencilFunc and
				glStencilOp.

       GL_TEXTURE_1D		If enabled, one-dimensional texturing is
				performed (unless two- or three-dimensional
				texturing is also enabled).  See glTexImage1D.

       GL_TEXTURE_2D		If enabled, two-dimensional texturing is
				performed (unless three-dimensional texturing
				is also enabled). See glTexImage2D.

       GL_TEXTURE_3D		If enabled, three-dimensional texturing is
				performed. See glTexImage3D.

       GL_TEXTURE_GEN_Q		If enabled, the q texture coordinate is
				computed using the texture generation function
				defined with glTexGen.	Otherwise, the current
				q texture coordinate is used.  See glTexGen.

       GL_TEXTURE_GEN_R		If enabled, the r texture coordinate is
				computed using the texture generation function
				defined with glTexGen.	Otherwise, the current
				r texture coordinate is used.  See glTexGen.

       GL_TEXTURE_GEN_S		If enabled, the s texture coordinate is
				computed using the texture generation function
				defined with glTexGen.	Otherwise, the current
				s texture coordinate is used.  See glTexGen.

       GL_TEXTURE_GEN_T		If enabled, the t texture coordinate is
				computed using the texture generation function
				defined with glTexGen.	Otherwise, the current
				t texture coordinate is used.  See glTexGen.

NOTES
       GL_POLYGON_OFFSET_FILL, GL_POLYGON_OFFSET_LINE,
       GL_POLYGON_OFFSET_POINT, GL_COLOR_LOGIC_OP, and GL_INDEX_LOGIC_OP are
       available only if the GL version is 1.1 or greater.

       GL_RESCALE_NORMAL, and GL_TEXTURE_3D are available only if the GL
       version is 1.2 or greater.

       GL_COLOR_TABLE, GL_CONVOLUTION_1D, GL_CONVOLUTION_2D, GL_HISTOGRAM,
       GL_MINMAX, GL_POST_COLOR_MATRIX_COLOR_TABLE,
       GL_POST_CONVOLUTION_COLOR_TABLE, and GL_SEPARABLE_2D are available only
       if GL_ARB_imaging is returned from glGet with an argument of
       GL_EXTENSIONS.

       If GL_ARB_multitexture is supported, GL_TEXTURE_1D, GL_TEXTURE_2D,
       GL_TEXTURE_3D, GL_TEXTURE_GEN_S, GL_TEXTURE_GEN_T, GL_TEXTURE_GEN_R,
       and GL_TEXTURE_GEN_Q enable or disable the respective state for the
       active texture unit specified with glActiveTextureARB.

ERRORS
       GL_INVALID_ENUM is generated if cap is not one of the values listed
       previously.

       GL_INVALID_OPERATION is generated if glEnable or glDisable is executed
       between the execution of glBegin and the corresponding execution of
       glEnd.

SEE ALSO
       glActiveTextureARB(3G), glAlphaFunc(3G), glBlendFunc(3G),
       glClipPlane(3G), glColorMaterial(3G), glCullFace(3G), glDepthFunc(3G),
       glDepthRange(3G), glEnableClientState(3G), glFog(3G), glGet(3G),
       glIsEnabled(3G), glLight(3G), glLightModel(3G), glLineWidth(3G),
       glLineStipple(3G), glLogicOp(3G), glMap1(3G), glMap2(3G),
       glMaterial(3G), glNormal(3G), glPointSize(3G), glPolygonMode(3G),
       glPolygonOffset(3G), glPolygonStipple(3G), glScissor(3G),
       glStencilFunc(3G), glStencilOp(3G), glTexGen(3G), glTexImage1D(3G),
       glTexImage2D(3G), glTexImage3D(3G)

								 March 1, 2011
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