glIsEnabled function

Article
12/11/2020

The gllsEnabled function tests whether a capability is enabled.

Syntax

GLboolean WINAPI glIsEnabled(
   GLenum cap
);

Parameters

cap

A symbolic constant indicating an OpenGL capability. The following capabilities are accepted.

Value	Meaning
GL_ALPHA_TEST	See glAlphaFunc
GL_AUTO_NORMAL	See glEvalCoord
GL_BLEND	See glBlendFunc
GL_CLIP_PLANE i	See glClipPlane
GL_COLOR_ARRAY	See glColorPointer
GL_COLOR_LOGIC_OP	See glLogicOp
GL_COLOR_MATERIAL	See glColorMaterial
GL_CULL_FACE	See glCullFace
GL_DEPTH_TEST	See glDepthFunc and glDepthRange
GL_DITHER	See glEnable
GL_FOG	See glFog
GL_INDEX_ARRAY	See glIndexPointer
GL_INDEX_LOGIC_OP	See glLogicOp
GL_LIGHT i	See glLightModel and glLight
GL_LIGHTING	See glMaterial, glLightModel, and glLight
GL_LINE_SMOOTH	See glLineWidth
GL_LINE_STIPPLE	See glLineStipple
GL_MAP1_COLOR_4	See glMap1
GL_MAP1_INDEX	See glMap1
GL_MAP1_NORMAL	See glMap1
GL_MAP1_TEXTURE_COORD_1	See glMap1
GL_MAP1_TEXTURE_COORD_2	See glMap1
GL_MAP1_TEXTURE_COORD_3	See glMap1
GL_MAP1_TEXTURE_COORD_4	See glMap1
GL_MAP1_VERTEX_3	See glMap1
GL_MAP1_VERTEX_4	See glMap1
GL_MAP2_COLOR_4	See glMap2
GL_MAP2_INDEX	See glMap2
GL_MAP2_NORMAL	See glMap2
GL_MAP2_TEXTURE_COORD_1	See glMap2
GL_MAP2_TEXTURE_COORD_2	See glMap2
GL_MAP2_TEXTURE_COORD_3	See glMap2
GL_MAP2_TEXTURE_COORD_4	See glMap2
GL_MAP2_VERTEX_3	See glMap2
GL_MAP2_VERTEX_4	See glMap2
GL_NORMAL_ARRAY	See glNormalPointer
GL_NORMALIZE	See glNormal
GL_POINT_SMOOTH	See glPointSize
GL_POLYGON_OFFSET_FILL	See glPolygonOffset
GL_POLYGON_OFFSET_LINE	See glPolygonOffset
GL_POLYGON_OFFSET_POINT	See glPolygonOffset
GL_POLYGON_SMOOTH	See glPolygonMode
GL_POLYGON_STIPPLE	See glPolygonStipple
GL_SCISSOR_TEST	See glScissor
GL_STENCIL_TEST	See glStencilFunc and glStencilOp
GL_TEXTURE_1D	See glTexImage1D
GL_TEXTURE_2D	See glTexImage2D
GL_TEXTURE_COORD_ARRAY	See glTexCoordPointer
GL_TEXTURE_GEN_Q	See glTexGen
GL_TEXTURE_GEN_R	See glTexGen
GL_TEXTURE_GEN_S	See glTexGen
GL_TEXTURE_GEN_T	See glTexGen
GL_VERTEX_ARRAY	See glVertexPointer

Error codes

The following error codes can be retrieved by the glGetError function.

Name	Meaning
GL_INVALID_ENUM	cap was not an accepted value.
GL_INVALID_OPERATION	The function was called between a call to glBegin and the corresponding call to glEnd.

Remarks

The gllsEnabled function returns GL_TRUE if cap is an enabled capability and returns GL_FALSE otherwise.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	Gl.h
Library	Opengl32.lib
DLL	Opengl32.dll