glIsEnabled

Name

glIsEnabled — test whether a capability is enabled

GLboolean glIsEnabled( GLenum cap);

glIsEnabled returns GL_TRUE if cap is an enabled capability and returns GL_FALSE otherwise.

The following capabilities are accepted for cap:

`Constant`		`See function:`

`GL_ALPHA_TEST`		glAlphaFunc
`GL_BLEND`		glBlendFunc, glLogicOp
`GL_CLIP_PLANEi`		glClipPlane
`GL_COLOR_ARRAY`		glColorPointer
`GL_COLOR_LOGIC_OP`		glLogicOp
`GL_COLOR_MATERIAL`		glMaterial
`GL_CULL_FACE`		glCullFace
`GL_DEPTH_TEST`		glDepthFunc, glDepthRange
`GL_DITHER`		glEnable
`GL_FOG`		glFog
`GL_LIGHTi`		glLight, glLightModel
`GL_LIGHTING`		glLight, glLightModel, glMaterial
`GL_LINE_SMOOTH`		glLineWidth
`GL_MULTISAMPLE`		glEnable
`GL_NORMAL_ARRAY`		glNormalPointer
`GL_NORMALIZE`		glNormal
`GL_POINT_SIZE_ARRAY_OES`		glEnableClientState
`GL_POINT_SMOOTH`		glPointSize
`GL_POINT_SPRITE_OES`		glTexEnv
`GL_POLYGON_OFFSET_FILL`		glPolygonOffset
`GL_RESCALE_NORMAL`		glNormal
`GL_SAMPLE_ALPHA_TO_COVERAGE`		glSampleCoverage
`GL_SAMPLE_ALPHA_TO_ONE`		glSampleCoverage
`GL_SAMPLE_COVERAGE`		glSampleCoverage
`GL_SCISSOR_TEST`		glScissor
`GL_STENCIL_TEST`		glStencilFunc, glStencilOp
`GL_TEXTURE_2D`		glTexImage2D
`GL_TEXTURE_COORD_ARRAY`		glTexCoordPointer
`GL_VERTEX_ARRAY`		glVertexPointer

If an error is generated, glIsEnabled returns 0.

GL_INVALID_ENUM is generated if cap is not an accepted value.