glEnable, glDisable

The glEnable and glDisable functions enable or disable OpenGL capabilities.

void glEnable(
  GLenum cap   
);
 
void glDisable(
  GLenum cap   
);

Parameters

cap: A symbolic constant indicating an OpenGL capability.
For discussion of the values cap can take, see the following Remarks section.

Remarks

The glEnable and glDisable functions enable and disable various capabilities. Use glIsEnabled or glGet to determine the current setting of any capability.

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, compute surface normal vectors analytically when either GL_MAP2_VERTEX_3 or GL_MAP2_VERTEX_4 has generated 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_MATERIAL: If enabled, have one or more material parameters track the current color. See glColorMaterial.
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. See glDepthFunc and glDepthRange.
GL_DITHER: If enabled, dither color components or indexes before they are written to the color buffer.
GL_FOG: If enabled, blend a fog color into the post-texturing color. See glFog.
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. If disabled, associate the current color or index with each vertex. See glMaterial, glLightModel, and glLight.
GL_LINE_SMOOTH: If enabled, draw lines with correct filtering. If disabled, draw aliased lines. See glLineWidth.
GL_LINE_STIPPLE: If enabled, use the current line stipple pattern when drawing lines. See glLineStipple.
GL_LOGIC_OP: If enabled, apply the currently selected logical operation to the incoming and color-buffer indexes. See glLogicOp.
GL_MAP1_COLOR_4: If enabled, calls to glEvalCoord1, glEvalMesh1, and glEvalPoint1 generate RGBA values. See also glMap1.
GL_MAP1_INDEX: If enabled, calls to glEvalCoord1, glEvalMesh1, and glEvalPoint1 generate color indexes. See also glMap1.
GL_MAP1_NORMAL: If enabled, calls to glEvalCoord1, glEvalMesh1, and glEvalPoint1 generate normals. See also glMap1.
GL_MAP1_TEXTURE_COORD_1: If enabled, calls to glEvalCoord1, glEvalMesh1, and glEvalPoint1 generate s texture coordinates. See also glMap1.
GL_MAP1_TEXTURE_COORD_2: If enabled, calls to glEvalCoord1, glEvalMesh1, and glEvalPoint1 generate s and t texture coordinates. See also glMap1.
GL_MAP1_TEXTURE_COORD_3: If enabled, calls to glEvalCoord1, glEvalMesh1, and glEvalPoint1 generate s, t, and r texture coordinates. See also glMap1.
GL_MAP1_TEXTURE_COORD_4: If enabled, calls to glEvalCoord1, glEvalMesh1, and glEvalPoint1 generate s, t, r, and q texture coordinates. See also glMap1.
GL_MAP1_VERTEX_3: If enabled, calls to glEvalCoord1, glEvalMesh1, and glEvalPoint1 generate x, y, and z vertex coordinates. See also glMap1.
GL_MAP1_VERTEX_4: If enabled, calls to glEvalCoord1, glEvalMesh1, and glEvalPoint1 generate homogeneous x, y, z, and w vertex coordinates. See also glMap1.
GL_MAP2_COLOR_4: If enabled, calls to glEvalCoord2, glEvalMesh2, and glEvalPoint2 generate RGBA values. See also glMap2.
GL_MAP2_INDEX: If enabled, calls to glEvalCoord2, glEvalMesh2, and glEvalPoint2 generate color indexes. See also glMap2.
GL_MAP2_NORMAL: If enabled, calls to glEvalCoord2, glEvalMesh2, and glEvalPoint2 generate normals. See also glMap2.
GL_MAP2_TEXTURE_COORD_1: If enabled, calls to glEvalCoord2, glEvalMesh2, and glEvalPoint2 generate s texture coordinates. See also glMap2.
GL_MAP2_TEXTURE_COORD_2: If enabled, calls to glEvalCoord2, glEvalMesh2, and glEvalPoint2 generate s and t texture coordinates. See also glMap2.
GL_MAP2_TEXTURE_COORD_3: If enabled, calls to glEvalCoord2, glEvalMesh2, and glEvalPoint2 generate s, t, and r texture coordinates. See also glMap2.
GL_MAP2_TEXTURE_COORD_4: If enabled, calls to glEvalCoord2, glEvalMesh2, and glEvalPoint2 generate s, t, r, and q texture coordinates. See also glMap2.
GL_MAP2_VERTEX_3: If enabled, calls to glEvalCoord2, glEvalMesh2, and glEvalPoint2 generate x, y, and z vertex coordinates. See also glMap2.
GL_MAP2_VERTEX_4: If enabled, calls to glEvalCoord2, glEvalMesh2, and glEvalPoint2 generate homogeneous x, y, z, and w vertex coordinates. See also glMap2.
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. If disabled, draw aliased points. See glPointSize.
GL_POLYGON_SMOOTH: If enabled, draw polygons with proper filtering. If disabled, draw aliased polygons. See glPolygonMode.
GL_POLYGON_STIPPLE: If enabled, use the current polygon stipple pattern when rendering polygons. See glPolygonStipple.
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-dimensional texturing is also enabled). See glTexImage1D.
GL_TEXTURE_2D: If enabled, two-dimensional texturing is performed. See glTexImage2D.
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.
GL_TEXTURE_GEN_R: If enabled, the r texture coordinate is computed using the texture generation function defined with glTexGen. If disabled, the current r texture coordinate is used.
GL_TEXTURE_GEN_S: If enabled, the s texture coordinate is computed using the texture generation function defined with glTexGen. If disabled, the current s texture coordinate is used.
GL_TEXTURE_GEN_T: If enabled, the t texture coordinate is computed using the texture generation function defined with glTexGen. If disabled, the current t texture coordinate is used.

Error Codes

The following are the error codes generated and their conditions.

Error Code	Condition
GL_INVALID_ENUM	cap was not one of the values listed in the preceding Remarks section.
GL_INVALID_OPERATION	glEnable was called between a call to glBegin and the corresponding call to glEnd.

QuickInfo

  Windows NT: Use version 3.5 and later.
  Windows: Use Windows 95 and later.
  Windows CE: Unsupported.
  Header: Declared in gl.h.
  Import Library: Link with opengl32.lib.

glEnable, glDisable

Parameters

Remarks

Error Codes

QuickInfo

See Also