GlIsEnabled - mkilgore/QB64pe GitHub Wiki

_glIsEnabled, glIsEnabledi: test whether a capability is enabled

  FUNCTION _glIsEnabled~%% (BYVAL cap AS _UNSIGNED LONG)
  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		_GL_BLEND		_GL_CLIP_DISTANCEi		_GL_COLOR_LOGIC_OP		_GL_CULL_FACE		_GL_DEPTH_CLAMP		_GL_DEBUG_OUTPUT		_GL_DEBUG_OUTPUT_SYNCHRONOUS		_GL_DEPTH_TEST		_GL_DITHER		_GL_FRAMEBUFFER_SRGB		_GL_LINE_SMOOTH		_GL_MULTISAMPLE		_GL_POLYGON_SMOOTH		_GL_POLYGON_OFFSET_FILL		_GL_POLYGON_OFFSET_LINE		_GL_POLYGON_OFFSET_POINT		_GL_PROGRAM_POINT_SIZE		_GL_PRIMITIVE_RESTART		_GL_SAMPLE_ALPHA_TO_COVERAGE		_GL_SAMPLE_ALPHA_TO_ONE		_GL_SAMPLE_COVERAGE		_GL_SAMPLE_MASK		_GL_SCISSOR_TEST		_GL_STENCIL_TEST		_GL_TEXTURE_CUBEMAP_SEAMLESS	_glEnable

If an error is generated, _glIsEnabled and _glIsEnabledi return _GL_FALSE.

_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.

SUB _GL _glEnable, _glDisable, _glGet

Copyright: 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License.
For details, see https://spdx.org/licenses/SGI-B-2.0.html.

Copyright 1991-2006 Silicon Graphics, Inc. Copyright 2010-2011 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.