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GLPOLYGONSTIPPLE(3G)		 OpenGL Manual		  GLPOLYGONSTIPPLE(3G)

NAME
       glPolygonStipple - set the polygon stippling pattern

C SPECIFICATION
       void glPolygonStipple(const GLubyte * pattern);

PARAMETERS
       pattern
	   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.
       Stippling is independent of polygon antialiasing.

       pattern 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.
       glPixelStore() parameters like GL_UNPACK_SWAP_BYTES and
       GL_UNPACK_LSB_FIRST affect the assembling of the bits into a stipple
       pattern. Pixel transfer operations (shift, offset, pixel map) are not
       applied to the stipple image, however.

       If a non-zero named buffer object is bound to the
       GL_PIXEL_UNPACK_BUFFER target (see glBindBuffer()) while a stipple
       pattern is specified, pattern is treated as a byte offset into the
       buffer object's data store.

       To enable and disable polygon stippling, call glEnable() and
       glDisable() with argument GL_POLYGON_STIPPLE. Polygon stippling is
       initially disabled. If it's enabled, a rasterized polygon fragment with
       window coordinates x w and y w is sent to the next stage of the GL if
       and only if the (x w % 32)th bit in the (y w % 32)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 a non-zero buffer object name is
       bound to the GL_PIXEL_UNPACK_BUFFER target and the buffer object's data
       store is currently mapped.

       GL_INVALID_OPERATION is generated if a non-zero buffer object name is
       bound to the GL_PIXEL_UNPACK_BUFFER target and the data would be
       unpacked from the buffer object such that the memory reads required
       would exceed the data store size.

       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

       glGet() with argument GL_PIXEL_UNPACK_BUFFER_BINDING

SEE ALSO
       glDrawPixels(), glLineStipple(), glPixelStore(), glPixelTransfer()

COPYRIGHT
       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/.

AUTHORS
       opengl.org

opengl.org			  04/29/2014		  GLPOLYGONSTIPPLE(3G)

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