# Method GL.glIsEnabled()

Method glIsEnabled

  ``int` glIsEnabled(`int` `cap`)`

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:

  .TS lb lb l l l. Constant See _

  GL_ALPHA_TEST glAlphaFunc GL_AUTO_NORMAL glEvalCoord GL_BLEND glBlendFunc, glLogicOp `GL_CLIP_PLANE` i `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_LIGHT` i 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` .TE

Parameter `cap`

  Specifies a symbolic constant indicating a GL capability.

Throws

  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.