glPolygonStipple man page on SunOS

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GLPOLYGONSTIPPLE(3gl)					 GLPOLYGONSTIPPLE(3gl)

NAME
       glPolygonStipple - set the polygon stippling pattern

C SPECIFICATION
       void glPolygonStipple( const GLubyte *mask )

PARAMETERS
       mask  Specifies	a  pointer  to	a  32×32  stipple pattern that will be
	     unpacked from memory in the same way  that	 glDrawPixels  unpacks
	     pixels.

DESCRIPTION
       Polygon	stippling,  like line stippling (see glLineStipple), masks out
       certain fragments produced by rasterization, creating a pattern.	 Stip‐
       pling is independent of polygon antialiasing.

       mask  is	 a pointer to a 32×32 stipple pattern that is stored in memory
       just like the pixel data supplied to a glDrawPixels  call  with	height
       and  width both equal to 32, a pixel format of GL_COLOR_INDEX, and data
       type of GL_BITMAP.  That is, the stipple pattern is  represented	 as  a
       32×32  array of 1-bit color indices packed in unsigned bytes.  glPixel‐
       Store  parameters  like	GL_UNPACK_SWAP_BYTES  and  GL_UNPACK_LSB_FIRST
       affect the assembling of the bits into a stipple pattern.  Pixel trans‐
       fer operations (shift, offset, pixel map) are not applied to the	 stip‐
       ple image, however.

       To  enable  and	disable polygon stippling, call glEnable and glDisable
       with argument GL_POLYGON_STIPPLE. Polygon stippling is  initially  dis‐
       abled. If it's enabled, a rasterized polygon fragment with window coor‐
       dinates xw and yw is sent to the next stage of the GL if	 and  only  if
       the  (xwmod32)th bit in the (ywmod32)th row of the stipple pattern is 1
       (one).  When polygon stippling is disabled, it is  as  if  the  stipple
       pattern consists of all 1's.

ERRORS
       GL_INVALID_OPERATION  is	 generated  if	glPolygonStipple  is  executed
       between the execution of glBegin and  the  corresponding	 execution  of
       glEnd.

ASSOCIATED GETS
       glGetPolygonStipple
       glIsEnabled with argument GL_POLYGON_STIPPLE

SEE ALSO
       glDrawPixels, glLineStipple, glPixelStore, glPixelTransfer

				   15 Mar 97		 GLPOLYGONSTIPPLE(3gl)
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