glIsEnabled, glIsEnabledi — test whether a capability is enabled
GLboolean glIsEnabled(
|
GLenum cap) ; |
GLboolean glIsEnabledi(
|
GLenum cap, |
GLuint index) ; |
cap
Specifies a symbolic constant indicating a GL capability.
index
Specifies the index of the capability.
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_DISTANCE i
|
glEnable |
GL_COLOR_LOGIC_OP
|
glLogicOp |
GL_CULL_FACE
|
glCullFace |
GL_DEPTH_CLAMP
|
glEnable |
GL_DEBUG_OUTPUT
|
glEnable |
GL_DEBUG_OUTPUT_SYNCHRONOUS
|
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_PRIMITIVE_RESTART_FIXED_INDEX
|
glEnable, |
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_CUBE_MAP_SEAMLESS
|
glEnable |
If an error is generated,
glIsEnabled
and glIsEnabledi
return GL_FALSE
.
GL_PRIMITIVE_RESTART_FIXED_INDEX
are available only if the GL version is 4.3 or greater.
GL_DEBUG_OUTPUT
and GL_DEBUG_OUTPUT_SYNCHRONOUS
are available only if the GL version is 4.3 or greater.
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
.
OpenGL Version | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Function / Feature Name | 2.0 | 2.1 | 3.0 | 3.1 | 3.2 | 3.3 | 4.0 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5 |
glIsEnabled
|
✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
glIsEnabledi
|
- | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see https://khronos.org/registry/OpenGL-Refpages/LICENSES/LicenseRef-FreeB.txt.