fglIsEnabled man page on IRIX

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fglIsEnabled(3G)	       OpenGL Reference		      fglIsEnabled(3G)

NAME
     fglIsEnabled - test whether a capability is enabled

FORTRAN SPECIFICATION
     LOGICAL*1 fglIsEnabled( INTEGER*4 cap )

PARAMETERS
     cap  Specifies a symbolic constant indicating a GL capability.

DESCRIPTION
     fglIsEnabled 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_ALPHA_TEST			fglAlphaFunc
     GL_ASYNC_DRAW_PIXELS_SGIX		fglDrawPixels
     GL_ASYNC_READ_PIXELS_SGIX		fglReadPixels
     GL_ASYNC_TEX_IMAGE_SGIX		fglTexImage1D, fglTexImage2D, fglTexImage3D, fglTexSubImage1D, fglTexSubImage2D, fglTexSubImage3D
     GL_AUTO_NORMAL			fglEvalCoord
     GL_BLEND				fglBlendFunc, fglLogicOp
     GL_CLIP_PLANEi			fglClipPlane
     GL_COLOR_ARRAY			fglColorPointer
     GL_COLOR_LOGIC_OP			fglLogicOp
     GL_COLOR_MATERIAL			fglColorMaterial
     GL_COLOR_TABLE			fglColorTable
     GL_CONVOLUTION_1D			fglConvolutionFilter1D
     GL_CONVOLUTION_2D			fglConvolutionFilter2D
     GL_CULL_FACE			fglCullFace
     GL_DEPTH_TEST			fglDepthFunc, fglDepthRange
     GL_DITHER				fglEnable
     GL_EDGE_FLAG_ARRAY			fglEdgeFlagPointer
     GL_FOG				fglFog
     GL_FOG_OFFSET_SGIX			fglFog
     GL_FRAGMENT_LIGHTi_SGIX		fglFragmentLightModel, fglFragmentLight
     GL_FRAGMENT_LIGHTING_SGIX		fglFragmentMaterial, fglFragmentLightModel, fglFragmentLight
     GL_HISTOGRAM			fglHistogram
     GL_INDEX_ARRAY			fglIndexPointer
     GL_INDEX_LOGIC_OP			fglLogicOp
     GL_INTERLACE_SGIX			fglDrawPixels, fglTexImage2D, fglTexSubImage2D, fglCopyPixels, fglCopyTexSubImage2D
     GL_INTERLACE_READ_INGR		fglReadPixels, fglCopyPixels, fglCopyTexSubImage2DEXT
     GL_IR_INSTRUMENT1_SGIX		fglInstrumentsBufferSGIX
     GL_LIGHTi				fglLightModel, fglLight
     GL_LIGHTING			fglMaterial, fglLightModel, fglLight
     GL_LINE_SMOOTH			fglLineWidth

									Page 1

fglIsEnabled(3G)	       OpenGL Reference		      fglIsEnabled(3G)

     GL_LINE_STIPPLE			fglLineStipple
     GL_LOGIC_OP			fglLogicOp
     GL_MAP1_COLOR_4			fglMap1
     GL_MAP1_INDEX			fglMap1
     GL_MAP1_NORMAL			fglMap1
     GL_MAP1_TEXTURE_COORD_1		fglMap1
     GL_MAP1_TEXTURE_COORD_2		fglMap1
     GL_MAP1_TEXTURE_COORD_3		fglMap1
     GL_MAP1_TEXTURE_COORD_4		fglMap1
     GL_MAP1_VERTEX_3			fglMap1
     GL_MAP1_VERTEX_4			fglMap1
     GL_MAP2_COLOR_4			fglMap2
     GL_MAP2_INDEX			fglMap2
     GL_MAP2_NORMAL			fglMap2
     GL_MAP2_TEXTURE_COORD_1		fglMap2
     GL_MAP2_TEXTURE_COORD_2		fglMap2
     GL_MAP2_TEXTURE_COORD_3		fglMap2
     GL_MAP2_TEXTURE_COORD_4		fglMap2
     GL_MAP2_VERTEX_3			fglMap2
     GL_MAP2_VERTEX_4			fglMap2
     GL_MINMAX				fglMinmax
     GL_NORMAL_ARRAY			fglNormalPointer
     GL_NORMALIZE			fglNormal
     GL_PIXEL_TEXTURE_SGIS		fglPixelTexGenParameterSGIS
     GL_POINT_SMOOTH			fglPointSize
     GL_POLYGON_SMOOTH			fglPolygonMode
     GL_POLYGON_OFFSET_EXT		fglPolygonOffsetEXT
     GL_POLYGON_OFFSET_FILL		fglPolygonOffset
     GL_POLYGON_OFFSET_LINE		fglPolygonOffset
     GL_POLYGON_OFFSET_POINT		fglPolygonOffset
     GL_POLYGON_SMOOTH			fglPolygonMode
     GL_POLYGON_STIPPLE			fglPolygonStipple
     GL_POST_COLOR_MATRIX_COLOR_TABLE	fglColorTable
     GL_POST_CONVOLUTION_COLOR_TABLE	fglColorTable
     GL_REFERENCE_PLANE_SGIX		fglReferencePlaneSGIX
     GL_RESCALE_NORMAL			fglNormal
     GL_SAMPLE_ALPHA_TO_MASK_SGIS	fglSampleMaskSGIS
     GL_SAMPLE_ALPHA_TO_ONE_SGIS	fglSampleMaskSGIS
     GL_SAMPLE_MASK_SGIS		fglSampleMaskSGIS
     GL_SCISSOR_TEST			fglScissor
     GL_SEPARABLE_2D			fglSeparableFilter2D
     GL_SPRITE_SGIX			fglSpriteParameterSGIX
     GL_STENCIL_TEST			fglStencilFunc, fglStencilOp
     GL_TEXTURE_1D			fglTexImage1D
     GL_TEXTURE_2D			fglTexImage2D
     GL_TEXTURE_3D			fglTexImage3D
     GL_TEXTURE_COLOR_TABLE_SGI		fglColorTableSGI
     GL_TEXTURE_COORD_ARRAY		fglTexCoordPointer
     GL_TEXTURE_GEN_Q			fglTexGen
     GL_TEXTURE_GEN_R			fglTexGen

									Page 2

fglIsEnabled(3G)	       OpenGL Reference		      fglIsEnabled(3G)

     GL_TEXTURE_GEN_S			fglTexGen
     GL_TEXTURE_GEN_T			fglTexGen
     GL_VERTEX_ARRAY			fglVertexPointer

NOTES
     If an error is generated, fglIsEnabled returns 0.

     GL_COLOR_LOGIC_OP, GL_COLOR_ARRAY, GL_EDGE_FLAG_ARRAY, GL_INDEX_ARRAY,
     GL_INDEX_LOGIC_OP, GL_NORMAL_ARRAY, GL_POLYGON_OFFSET_FILL,
     GL_POLYGON_OFFSET_LINE, GL_POLYGON_OFFSET_POINT, GL_TEXTURE_COORD_ARRAY,
     and GL_VERTEX_ARRAY 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 when fglGet is called with GL_EXTENSIONS.

     GL_FRAGMENT_LIGHTi_SGIX and GL_FRAGMENT_LIGHTING_SGIX are available only
     if _SGIX_fragment_lighting is returned when fglGet is called with
     GL_EXTENSIONS.

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

     GL_INVALID_OPERATION is generated if fglIsEnabled is executed between the
     execution of fglBegin and the corresponding execution of fglEnd.

MACHINE DEPENDENCIES
     The SGIX_async and SGIX_async_pixel extensions are implemented only on
     Octane2 VPro systems.

     GL_COLOR_TABLE_SGI, GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI and
     GL_POST_CONVOLUTION_COLOR_TABLE_SGI are part of the SGI_color_table
     extension which is not supported on RealityEngine, RealityEngine2, and
     VTX systems.

     The SGIX_fragment_lighting extension is supported only on Octane2 VPro
     systems.

     On Octane2 VPro systems, fglLightModel with GL_SEPARATE_SPECULAR_COLOR is
     not compatible with fragment lighting.  If fragment lighting is enabled,
     it will override the separate specular color light model.

     The SGIX_interlace extension is supported only on InfiniteReality
     systems, on RealityEngine, RealityEngine2, and VTX systems, on Octane2
     VPro systems, and on O2 systems.

									Page 3

fglIsEnabled(3G)	       OpenGL Reference		      fglIsEnabled(3G)

     The INGR_interlace_read extension is supported only on Octane2 VPro
     systems, and on O2 systems.

     GL_PIXEL_TEXTURE_SGIS is part of the SGIS_pixel_texture extension, which
     is supported only on Octane2 VPro systems.

SEE ALSO
     fglEnable, fglEnableClientState, fglGet

									Page 4

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