DragonFly On-Line Manual Pages

GLISENABLED()                                                    GLISENABLED()

NAME
       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_ALPHA_TEST              glAlphaFunc
       GL_AUTO_NORMAL             glEvalCoord
       GL_BLEND                   glBlendFunc, glLogicOp
       GL_CLIP_PLANEi             glClipPlane
       GL_COLOR_ARRAY             glColorPointer
       GL_COLOR_LOGIC_OP          glLogicOp
       GL_COLOR_MATERIAL          glColorMaterial
       GL_CULL_FACE               glCullFace
       GL_DEPTH_TEST              glDepthFunc, glDepthRange
       GL_DITHER                  glEnable
       GL_EDGE_FLAG_ARRAY         glEdgeFlagPointer
       GL_FOG                     glFog
       GL_INDEX_ARRAY             glIndexPointer
       GL_INDEX_LOGIC_OP          glLogicOp
       GL_LIGHTi                  glLightModel, glLight
       GL_LIGHTING                glMaterial, glLightModel, glLight
       GL_LINE_SMOOTH             glLineWidth
       GL_LINE_STIPPLE            glLineStipple
       GL_MAP1_COLOR_4            glMap1, glMap2
       GL_MAP2_TEXTURE_COORD_2    glMap2
       GL_MAP2_TEXTURE_COORD_3    glMap2
       GL_MAP2_TEXTURE_COORD_4    glMap2
       GL_MAP2_VERTEX_3           glMap2
       GL_MAP2_VERTEX_4           glMap2
       GL_NORMAL_ARRAY            glNormalPointer
       GL_NORMALIZE               glNormal
       GL_POINT_SMOOTH            glPointSize
       GL_POLYGON_SMOOTH          glPolygonMode
       GL_POLYGON_OFFSET_FILL     glPolygonOffset
       GL_POLYGON_OFFSET_LINE     glPolygonOffset
       GL_POLYGON_OFFSET_POINT    glPolygonOffset
       GL_POLYGON_STIPPLE         glPolygonStipple
       GL_SCISSOR_TEST            glScissor
       GL_STENCIL_TEST            glStencilFunc, glStencilOp
       GL_TEXTURE_1D              glTexImage1D
       GL_TEXTURE_2D              glTexImage2D
       GL_TEXTURE_COORD_ARRAY     glTexCoordPointer
       GL_TEXTURE_GEN_Q           glTexGen
       GL_TEXTURE_GEN_R           glTexGen
       GL_TEXTURE_GEN_S           glTexGen
       GL_TEXTURE_GEN_T           glTexGen
       GL_VERTEX_ARRAY            glVertexPointer

NOTES
       If an error is generated, glIsEnabled 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 only available if the
       GL version is 1.1 or greater

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

       GL_INVALID_OPERATION is generated if glIsEnabled is executed between
       the execution of glBegin and the corresponding execution of glEnd.

SEE ALSO
       glEnable, glEnableClientState

                                                                 GLISENABLED()