man glIsEnabled (3): test whether a capability is enabled

Other Alias

_glIsEnabledi

C SPECIFICATION

GLboolean glIsEnabled(GLenum cap);
GLboolean glIsEnabledi(GLenum cap, GLuint index);

PARAMETERS

cap

: Specifies a symbolic constant indicating a GL capability.

index

: Specifies the index of the capability.

DESCRIPTION

glIsEnabled returns GL_TRUE if cap is an enabled capability and returns GL_FALSE otherwise. Boolean states that are indexed may be tested with glIsEnabledi. For glIsEnabledi, index specifies the index of the capability to test. index must be between zero and the count of indexed capabilities for cap. Initially all capabilities except GL_DITHER are disabled; GL_DITHER is initially enabled.

The following capabilities are accepted for cap:

Constant	See
GL_BLEND	glBlendFunc(), glLogicOp()
GL_CLIP_DISTANCEi	glEnable()
GL_COLOR_LOGIC_OP	glLogicOp()
GL_CULL_FACE	glCullFace()
GL_DEPTH_CLAMP	glEnable()
GL_DEPTH_TEST	glDepthFunc(), glDepthRange()
GL_DITHER	glEnable()
GL_FRAMEBUFFER_SRGB	glEnable()
GL_LINE_SMOOTH	glLineWidth()
GL_MULTISAMPLE	glSampleCoverage()
GL_POLYGON_SMOOTH	glPolygonMode()
GL_POLYGON_OFFSET_FILL	glPolygonOffset()
GL_POLYGON_OFFSET_LINE	glPolygonOffset()
GL_POLYGON_OFFSET_POINT	glPolygonOffset()
GL_PROGRAM_POINT_SIZE	glEnable()
GL_PRIMITIVE_RESTART	glEnable(), glPrimitiveRestartIndex()
GL_SAMPLE_ALPHA_TO_COVERAGE	glSampleCoverage()
GL_SAMPLE_ALPHA_TO_ONE	glSampleCoverage()
GL_SAMPLE_COVERAGE	glSampleCoverage()
GL_SAMPLE_MASK	glEnable()
GL_SCISSOR_TEST	glScissor()
GL_STENCIL_TEST	glStencilFunc(), glStencilOp()
GL_TEXTURE_CUBEMAP_SEAMLESS	glEnable()

NOTES

If an error is generated, glIsEnabled and glIsEnabledi return GL_FALSE.

ERRORS

GL_INVALID_ENUM is generated if cap is not an accepted value.

GL_INVALID_VALUE is generated by glIsEnabledi if index is outside the valid range for the indexed state cap.

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