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glgetpolygonstipple(3g) [centos man page]

GLGETPOLYGONSTIPPLE(3G) 					   OpenGL Manual					   GLGETPOLYGONSTIPPLE(3G)

NAME
glGetPolygonStipple - return the polygon stipple pattern C SPECIFICATION
void glGetPolygonStipple(GLubyte * pattern); PARAMETERS
pattern Returns the stipple pattern. The initial value is all 1's. DESCRIPTION
glGetPolygonStipple returns to pattern a 32 x 32 polygon stipple pattern. The pattern is packed into memory as if glReadPixels() with both height and width of 32, type of GL_BITMAP, and format of GL_COLOR_INDEX were called, and the stipple pattern were stored in an internal 32 x 32 color index buffer. Unlike glReadPixels(), however, pixel transfer operations (shift, offset, pixel map) are not applied to the returned stipple image. If a non-zero named buffer object is bound to the GL_PIXEL_PACK_BUFFER target (see glBindBuffer()) while a polygon stipple pattern is requested, pattern is treated as a byte offset into the buffer object's data store. NOTES
If an error is generated, no change is made to the contents of pattern. ERRORS
GL_INVALID_OPERATION is generated if a non-zero buffer object name is bound to the GL_PIXEL_PACK_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_PACK_BUFFER target and the data would be packed to the buffer object such that the memory writes required would exceed the data store size. GL_INVALID_OPERATION is generated if glGetPolygonStipple is executed between the execution of glBegin() and the corresponding execution of glEnd(). ASSOCIATED GETS
glGet() with argument GL_PIXEL_PACK_BUFFER_BINDING SEE ALSO
glPixelStore(), glPixelTransfer(), glPolygonStipple(), glReadPixels() COPYRIGHT
Copyright (C) 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 06/10/2014 GLGETPOLYGONSTIPPLE(3G)

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GLPOLYGONSTIPPLE(3G)													      GLPOLYGONSTIPPLE(3G)

NAME
glPolygonStipple - set the polygon stippling pattern C SPECIFICATION
void glPolygonStipple( const GLubyte *mask ) PARAMETERS
mask Specifies a pointer to a 32x32 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. mask is a pointer to a 32x32 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 of GL_COLOR_INDEX, and data type of GL_BITMAP. That is, the stipple pattern is represented as a 32x32 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. 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 coordinates 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(3G), glLineStipple(3G), glPixelStore(3G), glPixelTransfer(3G) GLPOLYGONSTIPPLE(3G)
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