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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.
39 lines
1.9 KiB
Plaintext
39 lines
1.9 KiB
Plaintext
'''_glStencilMask:''' control the front and back writing of individual bits in the stencil planes
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{{PageSyntax}}
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SUB _glStencilMask (BYVAL mask AS _UNSIGNED LONG)
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void '''_glStencilMask'''(GLuint {{Parameter|mask}});
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; mask
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: Specifies a bit mask to enable and disable writing of individual bits in the stencil planes. Initially, the mask is all 1's.
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{{PageDescription}}
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'''_glStencilMask''' controls the writing of individual bits in the stencil planes. The least significant ''n'' bits of {{Parameter|mask}}, where ''n'' is the number of bits in the stencil buffer, specify a mask. Where a 1 appears in the mask, it's possible to write to the corresponding bit in the stencil buffer. Where a 0 appears, the corresponding bit is write-protected. Initially, all bits are enabled for writing.
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There can be two separate {{Parameter|mask}} writemasks; one affects back-facing polygons, and the other affects front-facing polygons as well as other non-polygon primitives. {{KW|_glStencilMask}} sets both front and back stencil writemasks to the same values. Use {{KW|_glStencilMaskSeparate}} to set front and back stencil writemasks to different values.
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{{PageNotes}}
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{{KW|_glStencilMask}} is the same as calling {{KW|_glStencilMaskSeparate}} with {{Parameter|face}} set to {{KW|_GL_FRONT_AND_BACK}}.
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{{PageUseWith}}
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{{KW|_glGet}} with argument {{KW|_GL_STENCIL_WRITEMASK}}, {{KW|_GL_STENCIL_BACK_WRITEMASK}}, or {{KW|_GL_STENCIL_BITS}}
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{{PageSeeAlso}}
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{{KW|_GL}}
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{{KW|_glClear}}, {{KW|_glClearBuffer}}, {{KW|_glColorMask}}, {{KW|_glDepthMask}}, {{KW|_glStencilFunc}}, {{KW|_glStencilFuncSeparate}}, {{KW|_glStencilMaskSeparate}}, {{KW|_glStencilOp}}, {{KW|_glStencilOpSeparate}}
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{{PageCopyright}}
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Copyright 1991-2006 Silicon Graphics, Inc. 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/]. |