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131 lines
3.2 KiB
Plaintext
131 lines
3.2 KiB
Plaintext
'''_glIsEnabled, glIsEnabledi:''' test whether a capability is enabled
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{{PageSyntax}}
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FUNCTION _glIsEnabled~%% (BYVAL cap AS _UNSIGNED LONG)
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GLboolean '''_glIsEnabled'''(GLenum {{Parameter|cap}});
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GLboolean '''_glIsEnabledi'''(GLenum {{Parameter|cap}}, GLuint {{Parameter|index}});
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; cap
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: Specifies a symbolic constant indicating a GL capability.
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; index
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: Specifies the index of the capability.
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{{PageDescription}}
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'''_glIsEnabled''' returns {{KW|_GL_TRUE}} if {{Parameter|cap}} is an enabled capability and returns {{KW|_GL_FALSE}} otherwise. Boolean states that are indexed may be tested with '''_glIsEnabledi'''. For '''_glIsEnabledi''', {{Parameter|index}} specifies the index of the capability to test. {{Parameter|index}} must be between zero and the count of indexed capabilities for {{Parameter|cap}}. Initially all capabilities except {{KW|_GL_DITHER}} are disabled; {{KW|_GL_DITHER}} is initially enabled.
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The following capabilities are accepted for {{Parameter|cap}}:
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{|
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! '''Constant'''
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! '''See'''
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| {{KW|_GL_BLEND}}
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| {{KW|_glBlendFunc}}, {{KW|_glLogicOp}}
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|+
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| {{KW|_GL_CLIP_DISTANCE}}''i''
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| {{KW|_glEnable}}
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| {{KW|_GL_COLOR_LOGIC_OP}}
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| {{KW|_glLogicOp}}
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| {{KW|_GL_CULL_FACE}}
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| {{KW|_glCullFace}}
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| {{KW|_GL_DEPTH_CLAMP}}
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| {{KW|_glEnable}}
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| {{KW|_GL_DEBUG_OUTPUT}}
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| {{KW|_glEnable}}
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| {{KW|_GL_DEBUG_OUTPUT_SYNCHRONOUS}}
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| {{KW|_glEnable}}
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| {{KW|_GL_DEPTH_TEST}}
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| {{KW|_glDepthFunc}}, {{KW|_glDepthRange}}
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| {{KW|_GL_DITHER}}
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| {{KW|_glEnable}}
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| {{KW|_GL_FRAMEBUFFER_SRGB}}
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| {{KW|_glEnable}}
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| {{KW|_GL_LINE_SMOOTH}}
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| {{KW|_glLineWidth}}
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| {{KW|_GL_MULTISAMPLE}}
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| {{KW|_glSampleCoverage}}
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| {{KW|_GL_POLYGON_SMOOTH}}
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| {{KW|_glPolygonMode}}
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| {{KW|_GL_POLYGON_OFFSET_FILL}}
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| {{KW|_glPolygonOffset}}
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| {{KW|_GL_POLYGON_OFFSET_LINE}}
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| {{KW|_glPolygonOffset}}
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| {{KW|_GL_POLYGON_OFFSET_POINT}}
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| {{KW|_glPolygonOffset}}
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| {{KW|_GL_PROGRAM_POINT_SIZE}}
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| {{KW|_glEnable}}
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| {{KW|_GL_PRIMITIVE_RESTART}}
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| {{KW|_glEnable}}, {{KW|_glPrimitiveRestartIndex}}
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| {{KW|_GL_SAMPLE_ALPHA_TO_COVERAGE}}
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| {{KW|_glSampleCoverage}}
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| {{KW|_GL_SAMPLE_ALPHA_TO_ONE}}
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| {{KW|_glSampleCoverage}}
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| {{KW|_GL_SAMPLE_COVERAGE}}
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| {{KW|_glSampleCoverage}}
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| {{KW|_GL_SAMPLE_MASK}}
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| {{KW|_glEnable}}
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| {{KW|_GL_SCISSOR_TEST}}
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| {{KW|_glScissor}}
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| {{KW|_GL_STENCIL_TEST}}
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| {{KW|_glStencilFunc}}, {{KW|_glStencilOp}}
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| {{KW|_GL_TEXTURE_CUBEMAP_SEAMLESS}}
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| {{KW|_glEnable}}
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|}
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{{PageNotes}}
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If an error is generated, '''_glIsEnabled''' and '''_glIsEnabledi''' return {{KW|_GL_FALSE}}.
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{{KW|_GL_DEBUG_OUTPUT}} and {{KW|_GL_DEBUG_OUTPUT_SYNCHRONOUS}} are available only if the GL version is 4.3 or greater.
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{{PageErrors}}
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{{KW|_GL_INVALID_ENUM}} is generated if {{Parameter|cap}} is not an accepted value.
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{{KW|_GL_INVALID_VALUE}} is generated by '''_glIsEnabledi''' if {{Parameter|index}} is outside the valid range for the indexed state {{Parameter|cap}}.
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{{PageSeeAlso}}
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{{KW|_GL}}
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{{KW|_glEnable}}, {{KW|_glDisable}}, {{KW|_glGet}}
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{{PageCopyright}}
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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/ http://oss.sgi.com/projects/FreeB/]. |