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https://github.com/QB64-Phoenix-Edition/QB64pe.git
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6e01fc8dce
Added new _STRCMP and _STRICMP commands for quick string comparisons. Cleaned up QB64 to finish removing the QUI (quick user insert) code and folders. Altered UCASE and LCASE routines to be faster in some situations for us.
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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| {{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/]. |